Prospectus Filed Pursuant to Rule 424(b)(3) (424b3)

the ability of dMY IV and Planet prior to the Business Combination, and New Planet following the Business Combination, to:

meet the Closing conditions to the Business Combination, including approval by stockholders of dMY IV and Minimum Proceeds Condition;

realize the benefits expected from the Business Combination;

obtain and maintain the listing of New Planet’s Class A common stock on the NYSE following the Business Combination; and

the occurrence of any event, change or other circumstances that could give rise to the termination of the Merger Agreement;

New Planet’s success in retaining or recruiting, or changes required in, its officers, key employees or directors following the Business Combination;

factors relating to the business, operations and financial performance of Planet, including, but not limited to:

New Planet’s limited operating history;

whether a market for New Planet’s data grows as expected as well as the timing of such growth and New Planet’s ability to attract new customers;

New Planet’s ability to retain existing customers and renew existing contracts;

New Planet’s ability to sell additional data and analytic products or expand the scope of data services for its existing customers;

the competitiveness of New Planet’s geospatial data set and analytic capabilities relative to other commercial satellite data providers, including New Planet’s ability to continue to capture certain high-value government procurement contracts;

whether New Planet is subject to any risks as a result of its global operations, including, but not limited to, being subject to any hostile actions by a government or other state actor;

whether New Planet is subject to any cyber-attacks or other security incidents, and whether such actions, or any other events, compromise Planet’s satellites, satellite operations, infrastructure, archived data, information technology and communication systems and other related system;

the impact of New Planet’s satellites failing to operate as intended or them being destroyed or otherwise becoming inoperable;

New Planet’s ability to build satellites and procure third-party launch contracts at the same or lower cost as recent historical periods, in order to maintain or enhance the capabilities of its current operational satellite fleet;

New Planet’s ability to secure future financing, if needed, and whether New Planet is able to repay its existing indebtedness when due;

New Planet’s ability to increase its commercial sales organization;

New Planet’s ability to respond to general economic conditions;

New Planet’s ability to manage its growth effectively;

the impact of the COVID-19 pandemic;

the seasonality of New Planet’s business, which can be impacted by customer behavior and buying patterns, and has historically been weighted towards the second half of the year;

New Planet’s ability to comply with complex regulatory requirements; and

the continued development and evolution of New Planet’s software platform to enhance the ease of use and accessibility of its data products for non-geospatial experts and thus facilitate expansion into new vertical markets;

competition and competitive pressures from other companies worldwide in the industries in which New Planet will operate;

litigation and the ability to adequately protect New Planet’s intellectual property rights; and

other factors detailed under the section entitled “Risk Factors.”

Why am I receiving this proxy statement/prospectus?

dMY IV, First Merger Sub, Second Merger Sub and Planet have agreed to a business combination under the terms of the Merger Agreement that is described in this proxy statement/prospectus. A copy of the Merger Agreement is attached hereto as Annex A. dMY IV urges its stockholders to read the Merger Agreement in its entirety. The Merger Agreement must be adopted by the dMY IV Stockholders in accordance with the DGCL and the Current Charter. dMY IV is holding a Special Meeting to obtain that approval. dMY IV Stockholders will also be asked to vote on certain other matters described in this proxy statement/prospectus at the Special Meeting and to approve the adjournment of the Special Meeting, if necessary or appropriate, to solicit additional proxies in the event there are not sufficient votes at the time of the Special Meeting to adopt the Merger Agreement and thereby approve the Business Combination. Additionally, dMY IV must provide all holders of public shares with the opportunity to have their public shares redeemed in connection with its initial business combination. Holders who wish to exercise their redemption rights must, prior to 5:00 p.m., New York City time, on December 1, 2021: (i) submit a written request to the Transfer Agent that dMY IV redeem their public shares for cash and (ii) deliver their public shares to the Transfer Agent physically or electronically using the Depository Trust Company’s (“DTC”) Deposit and Withdrawal at Custodian (“DWAC”) system.

Why is dMY IV proposing the Business Combination?

dMY IV was formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or other similar business combination with one or more operating businesses.

When and where will the Special Meeting take place?

The dMY IV Special Meeting will be held on December 3, 2021, at 12:00 p.m., New York City time, at https://www.cstproxy.com/dmytechnologyiv/2021. In light of ongoing developments related to COVID-19, and the related protocols that governments have implemented, the Board determined that the special meeting will be a virtual meeting conducted exclusively via live webcast. The Board believes that this is the right choice for dMY IV and its stockholders at this time, as it permits stockholders to attend and participate in the special meeting while safeguarding the health and safety of dMY IV’s stockholders, directors and management team. You will be able to attend the special meeting online, vote, view the list of stockholders entitled to vote at the special meeting and submit your questions during the special meeting by visiting https://www.cstproxy.com/dmytechnologyiv/2021. To participate in the virtual meeting, you will need a 12-digit control number assigned by Continental Stock Transfer & Trust Company. The meeting webcast will begin promptly at 12:00 p.m., New York City time. You may also attend the meeting telephonically by dialing 1-877-770-3647 (toll-free within the United States and Canada) or +1-312-780-0854 (outside of the United States and Canada, standard rates apply). The passcode for telephone access is 78637428#, but please note that you will not be able to vote or ask questions if you choose to participate telephonically. We encourage you to access the meeting prior to the start time and you should allow ample time for the check-in procedures.

What matters will be considered at the Special Meeting?

The dMY IV Stockholders will be asked to consider and vote on the following proposals:

a proposal to adopt the Merger Agreement and approve the Business Combination (the “Business Combination Proposal”);

a proposal to approve, assuming the Business Combination Proposal is approved and adopted, the proposed amended and restated articles of incorporation (the “Proposed Charter”) of dMY IV (“Charter Proposal A”);

a proposal to approve, assuming the Business Combination Proposal and Charter Proposal A are approved and adopted, an amendment to the Proposed Charter to (i) increase the number of dMY IV Class A common stock from 380,000,00 shares to 570,000,000 shares of New Planet Class A common stock and the total number of authorized shares from 401,000,000 shares to 631,500,000 shares and (ii) provide that the number of authorized shares of any class of common stock or preferred stock may be increased or decreased (but not below the number of shares thereof then outstanding) by the affirmative vote of the holders of a majority of the stock of the Company entitled to vote, irrespective of the provisions of Section 242(b)(2) of the DGCL (“Charter Proposal B”, and along with Charter Proposal A, the “Charter Proposals”);

a proposal to approve, on a non-advisory basis and as required by applicable SEC guidance, certain material differences between the Current Charter and the Proposed Charter (the “Advisory Charter Proposals”);

to consider and vote upon a proposal to approve, assuming the Business Combination Proposal and the Charter Proposal A are approved and adopted, for the purposes of complying with the applicable listing rules of the NYSE, the issuance of (x) shares of New Planet Class A common stock and New Planet Class B common stock pursuant to the terms of the Merger Agreement and (y) shares of dMY IV Class A common stock to certain institutional investors and individuals (the “PIPE Investors”) in connection with the Private Placement (as later defined in this proxy statement/prospectus), plus any

additional shares pursuant to subscription agreements we may enter into prior to Closing (the “Stock Issuance Proposal”);

to consider and vote upon a proposal to approve, assuming the Business Combination Proposal, Charter Proposal A and the Stock Issuance Proposal are approved and adopted, the Incentive Plan (the “Incentive Plan Proposal”);

to consider and vote upon a proposal to approve, assuming the Business Combination Proposal, Charter Proposal A, the Stock Issuance Proposal and the Incentive Plan Proposal are approved and adopted, the ESPP (the “ESPP Proposal”); and

to consider and vote upon a proposal to approve the adjournment of the Special Meeting to a later date or dates, if necessary, to permit further solicitation and vote of proxies if, based upon the tabulated vote at the time of the Special Meeting, any of the condition precedent proposals would not be duly approved and adopted by our stockholders or we determine that one or more of the closing conditions under the Merger Agreement is not satisfied or waived (the “Adjournment Proposal”).

Is my vote important?

Yes. The Business Combination cannot be completed unless the Merger Agreement is adopted by a majority of the votes cast on such proposal by the dMY IV Stockholders present in person or represented by proxy at a meeting at which a quorum is present and entitled to vote thereon, and the other condition precedent proposals achieve the necessary vote outlined below. Only dMY IV Stockholders as of the close of business on October 19, 2021, the record date for the Special Meeting, are entitled to vote at the Special Meeting. The dMY IV Board unanimously recommends that such dMY IV Stockholders vote “FOR” the approval of the Business Combination Proposal, “FOR” the approval of Charter Proposal A, “FOR” the approval of Charter Proposal B, “FOR” the approval, on an advisory basis, of the Advisory Charter Proposals, “FOR” the approval of the Stock Issuance Proposal, “FOR” the approval of the Incentive Plan Proposal, “FOR” the approval of the ESPP Proposal and “FOR” the approval of the Adjournment Proposal.

If my shares are held in “street name” by my bank, brokerage firm or other nominee, will my bank, brokerage firm or other nominee automatically vote those shares for me?

No. Under the relevant rules, brokers are not permitted to vote on any of the matters to be considered at the Special Meeting. As a result, your public shares will not be voted on any matter unless you affirmatively instruct your broker, bank or nominee how to vote your shares in one of the ways indicated by your broker, bank or other nominee. You should instruct your broker to vote your shares in accordance with directions you provide.

What dMY IV Stockholder vote is required for the approval of each proposal brought before the Special Meeting? What will happen if I fail to vote or abstain from voting on each proposal?

The Business Combination Proposal. Approval of the Business Combination Proposal requires the affirmative vote of a majority of the votes cast by dMY IV Stockholders present in person (which would include presence at the virtual Special Meeting) or represented by proxy at the Special Meeting and entitled to vote thereon. The failure to vote and abstentions will have no effect on the outcome of the proposal. Our initial stockholders have agreed to vote their shares in favor of the Business Combination. The percentage of outstanding shares of dMY IV Class B common stock held by our Sponsor and our other initial stockholders that are obligated to vote in favor of the Business Combination, represents approximately 20% of the voting power of dMY IV. Accordingly, if all of our outstanding shares were to be voted, we would only need the additional affirmative vote of shares representing approximately 30.1% of the outstanding shares in order to approve the Business Combination. Because the Business Combination only requires a majority of the votes cast at the Special Meeting in order to be approved and if only the dMY IV Common Shares held by the

What will Planet’s equity holders receive in connection with the Business Combination?

Subject to the terms of the Merger Agreement, and subject to the satisfaction or waiver of certain closing conditions set forth therein, at the Closing, Planet Stockholders (other than holders of unvested Planet equity awards as of the Closing) will receive $2,135,000,000 in aggregate consideration (the “Aggregate Base Consideration”) in the form of newly issued New Planet Class A common stock and newly issued New Planet Class B common stock, as applicable, at a per share price of $10.00.

What equity stake will current dMY IV Stockholders and Planet Stockholders hold in New Planet immediately after the consummation of the Business Combination?

The following table illustrates varying ownership levels in New Planet at the Closing, assuming no redemptions by dMY IV’s public stockholders and the maximum redemptions by dMY IV’s public stockholders that would still result in satisfaction of the Minimum Proceeds Condition as described elsewhere in this proxy statement/prospectus:

Assumes that holders of 34,500,000 public shares exercise their redemption rights in connection with the Business Combination (maximum redemption scenario based on $345.1 million held in trust as of June 30, 2021 and a redemption price of $10.00 per share).

Amount presents shares on a fully diluted, net exercise basis. Includes shares of New Planet Class B common stock to be issued to the Planet Founders at the Closing. The actual number of outstanding shares of New Planet common stock held by Planet Stockholders at Closing will vary depending on the number of Planet Warrants and Planet options that remain unexercised prior to Closing and the number of Planet Restricted Stock Unit Awards that have not settled prior to the Closing. Based on shares of Planet capital stock outstanding as of June 29, 2021, an estimated 192,644,340 shares of New Planet common stock would be issued to Planet Stockholders (including Planet Stockholders and holders of Planet Restricted Stock Unit Awards that will vest in connection with the Business Combination) at Closing based on an illustrative Exchange Ratio under the Merger Agreement of approximately 1.5636. The actual Exchange Ratio will be calculated based on Planet’s outstanding capital stock as of immediately prior to the Effective Time.

Excludes up to 27,000,000 shares of New Planet common stock that may be issued as Contingent Consideration. The Planet Founders will receive shares of New Planet Class B common stock for any Contingent Consideration issued in respect of their ownership of Planet Class B common stock held immediately prior to the Mergers.

Excludes the 862,500 Founder Shares that will be part of Sponsor Earnout Securities and remain subject to forfeiture prior to vesting but over which Sponsor will be able to exercise voting authority.

Excludes 6,900,000 shares of New Planet Class A common stock that will be issuable upon exercise of the public warrants and 5,933,333 shares of New Planet Class A common stock that will be issuable upon exercise of the private placement warrants, a portion of which will be subject to future vesting as described in the section of this proxy statement/prospectus titled “Ancillary Agreements Related to the Business Combination—Founder Share Vesting.” Also excludes shares of New Planet common stock that will be available for issuance under the Incentive Plan and under the ESPP.

What voting power will current dMY IV Stockholders, the Planet Founders and other Planet Stockholders hold in New Planet immediately after the consummation of the Business Combination?

It is anticipated that, upon completion of the Business Combination, the voting power in New Planet will be as set forth in the table below (which was, except as noted below, prepared using the same assumptions as the immediately preceding table and related footnotes):

Consists of an estimated 21,596,032 shares of New Planet Class B common stock to be issued at the Closing to the Planet Founders, based on shares of Planet capital stock outstanding as of June 29, 2021 and an illustrative Exchange Ratio of approximately 1.5636. The actual Exchange Ratio will be calculated based on Planet’s outstanding capital stock as of immediately prior to the Effective Time.

Consists of the remaining consideration to be issued to other Planet Stockholders at the Closing, including shares issuable upon settlement of Planet Restricted Stock Unit Awards that will vest in connection with the Business Combination.

Includes the 862,500 Founder Shares that will be part of Sponsor Earnout Securities, and over which Sponsor will exercise voting authority prior to the vesting of such Sponsor Earnout Securities.

Do dMY IV’s directors and officers have any interest in the matters to be voted on at the Special Meeting?

Yes. When you consider the recommendation of the dMY IV Board in favor of approval of the Business Combination Proposal, you should keep in mind that dMY IV’s initial stockholders, including its directors

None of our officers and directors is required to commit their full time to our affairs and, accordingly, they may have conflicts of interest in allocating their time among various business activities.

Each of our officers and directors presently has, and any of them in the future may have additional, fiduciary or contractual obligations to another entity pursuant to which such officer or director is or will be required to present a business combination opportunity to such entity, including dMY Technology Group, Inc. VI (“dMY VI”), that is sponsored by an affiliate of our sponsor. The Current Charter provides that dMY IV renounces its interest in any corporate opportunity offered to any director or officer unless such opportunity is expressly offered to such person solely in his or her capacity as a director or officer of dMY IV and such opportunity is one dMY IV is legally and contractually permitted to undertake and would otherwise be reasonable for dMY IV to pursue, and to the extent the director or officer is permitted to refer that opportunity to dMY IV without violating another legal obligation. We do not believe, however, that the pre-existing fiduciary duties or contractual obligations of our officers and directors will materially undermine our ability to complete the Business Combination, and such pre-existing fiduciary duties and contractual obligations did not materially affect our search for an acquisition target.

If we are unable to complete our initial business combination by March 9, 2023 or during any Extension Period, we will: (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but not more than 10 business days thereafter, redeem the public shares and (iii) as promptly as reasonably possible following such redemption, subject to the approval of our remaining stockholders and our Board, liquidate and dissolve, subject in each case to our obligations under the DGCL to provide for claims of creditors and the requirements of other applicable law. There will be no redemption rights or liquidating distributions with respect to our warrants, which will expire worthless if we fail to complete our initial business combination by March 9, 2023 or during any Extension Period. Our initial stockholders purchased the Founder Shares prior to our initial public offering for an aggregate purchase price of $25,000. Upon the Closing, such Founder Shares will be converted into 8,625,000 shares of New Planet Class A common stock, 862,500 of which will be subject to further vesting conditions. Based on the closing price of dMY IV Class A common stock on NYSE of $10.13 on October 29, 2021, such vested shares would be worth $87,371,250.

Simultaneously with the Closing of our initial public offering, we consummated the sale of 5,933,333 private placement warrants at a price of $1.50 per warrant in a private placement to our Sponsor. The warrants are each exercisable commencing on the later of 30 days following the Closing and 12 months from the closing of our initial public offering, which occurred on March 9, 2021, for one share of dMY IV Class A common stock at $11.50 per share. If we do not consummate a Business Combination transaction by March 9, 2023 or during any Extension Period, then the proceeds from the sale of the private placement warrants will be part of the liquidating distribution to the public stockholders and the warrants held by our initial stockholders will be worthless. The warrants held by our initial stockholders had an aggregate market value of $15,011,332 based upon the closing price of $2.53 per warrant on the NYSE on October 29, 2021, with 2,966,667 private placement warrants that are unvested and subject to further vesting conditions.

Our Sponsor, officers and directors will lose their entire investment in us if we do not complete a business combination by March 9, 2023 or during any Extension Period. Certain of them may continue to serve as officers and/or directors of New Planet after the Closing. As such, in the future they may receive any cash fees, stock options or stock awards that the New Planet board of directors determines to pay to its directors and/or officers.

Our initial stockholders and our officers and directors have agreed to waive their rights to liquidating distributions from the Trust Account with respect to their Founder Shares if dMY IV fails to complete a business combination by March 9, 2023 or during any Extension Period.

In order to protect the amounts held in the Trust Account, the Sponsor has agreed that it will be liable to us if and to the extent any claims by a vendor for services rendered or products sold to us, or a prospective target business with which we have entered into a transaction agreement, reduce the amount of funds in the Trust Account. This liability will not apply with respect to any claims by a third party who executed a waiver of any right, title, interest or claim of any kind in or to any monies held in the Trust Account or to any claims under our indemnity of the underwriters of this offering against certain liabilities, including liabilities under the Securities Act.

Following the Closing, our Sponsor would be entitled to the repayment of any working capital loan and advances that have been made to dMY IV and remain outstanding. As of the date of this proxy statement/prospectus, our Sponsor has not made any advances to us for working capital expenses. If we do not complete an initial Business Combination within the required period, we may use a portion of our working capital held outside the Trust Account to repay the working capital loans, but no proceeds held in the Trust Account would be used to repay the working capital loans.

Following the consummation of the Business Combination, we will continue to indemnify our existing directors and officers and will maintain a directors’ and officers’ liability insurance policy.

Upon the Closing, subject to the terms and conditions of the Merger Agreement, our Sponsor, our officers and directors and their respective affiliates may be entitled to reimbursement for any reasonable out-of-pocket expenses related to identifying, investigating and consummating an initial Business Combination, and repayment of any other loans, if any, and on such terms as to be determined by dMY IV from time to time, made by our Sponsor or certain of our officers and directors to finance transaction costs in connection with an intended initial Business Combination. As of September 14, 2021, the total aggregate amount of out-of-pocket expenses expected to be repaid by dMY IV upon consummation of the business combination is $120,639.50.

Upon the completion of the Business Combination, Goldman and Needham & Company, LLC (“Needham”), who acted as dMY IV’s underwriters in the IPO, will be entitled to an aggregate deferred underwriting commission of $12,075,000. Additionally, Goldman, Morgan Stanley & Co. LLC (“Morgan Stanley”) and Needham will receive, in the aggregate, $21,930,000 in fees in connection with certain financial advisory services provided to Planet and dMY IV. Lastly, Morgan Stanley and Goldman will also be entitled to receive approximately $7,000,000 in placement agent fees in connection with the PIPE Investment. If we were to fail to complete a business combination by March 9, 2023 or during any Extension Period, none of Goldman, Needham or Morgan Stanley would receive their expected compensation for their collective roles as underwriters, financial advisors and placement agents.

Given the difference in the purchase price our Sponsor paid for the Founder Shares as compared to the price of the units sold in the IPO and the substantial number of shares of dMY IV Class A common stock that our Sponsor will receive upon conversion of the Founder Shares in connection with the Business Combination, our Sponsor and its affiliates may earn a positive rate of return on their investment even if the New Planet common stock trades below the price paid for the units in the IPO and the public stockholders experience a negative rate of return following the completion of the Business Combination.

The Sponsor owns 8,550,000 Founder Shares and Darla Anderson, Francesca Luthi and Charles E. Wert each own 25,000 founder shares, initially purchased from the Sponsor for an aggregate price of $25,225 (valued at $248,750 based on the closing price of $9.95 of the dMY IV Class A common stock on October 19, 2021, the record date for the Special Meeting), all of which will become worthless if an initial business combination is not completed by March 9, 2023.

The Sponsor owns 5,933,333 Private Placement Warrants (valued at $21,953,332.10, based on a valuation as of June 30, 2021, the most recent date for which a valuation is available), all of which will

become worthless if an initial business combination is not completed by March 9, 2023. The Sponsor purchased the Private Placement Warrants from dMY IV on March 4, 2021 for $1.50 per warrant, amounting to an aggregate purchase price of $8,900,000.

The Sponsor will benefit from the completion of a business combination and may be incentivized to complete an acquisition of a less favorable target company or on terms less favorable to the public stockholders rather than liquidating dMY IV.

We agreed to pay our Sponsor a total of $10,000 per month for office space, administrative and support services and such arrangement will terminate upon the Closing. As of October 29, 2021, we have paid our Sponsor a total of $70,000 in connection with this arrangement.

We agreed to repay our Sponsor a total of $37,000 under the promissory note that the Company may be unable to repay if the initial business combination is not completed.

The Sponsor and the initial stockholders will enter into an amended Registration Rights Agreement which will provide them with registration rights.

What happens to the funds deposited in the Trust Account after consummation of the Business Combination?

A total of $345,000,000, including $338,100,000 of the proceeds from the IPO (which amount includes $12,075,000 of the underwriters’ deferred discount) and approximately $6,900,000 of the proceeds of the

What happens if a substantial number of the public stockholders vote in favor of the Business Combination Proposal and exercise their redemption right?

dMY IV Stockholders who vote in favor of the Business Combination may also nevertheless exercise their redemption rights. Accordingly, the Business Combination may be consummated even though the funds available from the Trust Account and the number of public stockholders are reduced as a result of redemptions by public stockholders. The consummation of the Business Combination is conditioned upon, among other things, dMY IV having an aggregate cash amount of at least $250,000,000 available at Closing from the Trust Account and PIPE Investors (the “Minimum Proceeds Condition”). dMY IV intends to notify dMY IV Stockholders by press release promptly after it becomes aware that Planet has waived this condition. In addition, with fewer public shares and public stockholders, the trading market for New Planet Class A common stock may be less liquid than the market for dMY IV’s Class A common stock was prior to consummation of the Business Combination and New Planet may not be able to meet the listing standards for The New York Stock Exchange or another national securities exchange. In addition, with less funds available from the Trust Account, the working capital infusion from the Trust Account into Planet’s business will be reduced. As a result, the proceeds will be greater in the event that no public stockholders exercise redemption rights with respect to their public shares for a pro rata portion of the Trust Account as opposed to the scenario in which dMY IV’s public stockholders exercise the maximum allowed redemption rights.

The maximum redemption scenario assumes all 34,500,000 shares of dMY IV Class A common stock are redeemed for the proceeds in the Trust Account. Accordingly, the Trust Value per Share of non-redeeming shareholders is not applicable in the maximum redemption scenario.

The maximum redemption scenario assumes all 34,500,000 shares of dMY IV Class A common stock are redeemed for the proceeds in the Trust Account. Accordingly, deferred underwriting commission as a percentage of cash left in the Trust Account following redemptions is not applicable in the maximum redemption scenario.

What amendments will be made to the Current Charter?

We are asking dMY IV Stockholders to approve the Proposed Charter that will be effective upon the consummation of the Business Combination. The Proposed Charter provides for various changes that the dMY IV Board believes are necessary to address the needs of the post-Business Combination company, including, among other things: (i) the change of dMY IV’s name to “Planet Labs PBC”; (ii) the increase of the total number of shares of New Planet’s capital stock from 401,000,000 shares to 631,500,000 shares (or 441,500,000 shares in the event that Charter Proposal B does not pass), which would consist of (A) increasing (x) dMY IV Class A common stock from 380,000,00 shares to 570,000,000 shares of New Planet Class A common stock (or remaining at 380,000,000 shares in the event Charter Proposal B does not pass), (y) dMY IV Class B common stock from 20,000,000 shares to 30,000,000 shares of New Planet Class B common stock (assuming the holders of dMY IV Class B common stock approve such increase) and (z) the preferred stock of dMY IV from 1,000,000 shares to 1,500,000 shares of New Planet preferred stock, and (B) authorizing the creation of 30,000,000 shares of New Planet Class C common stock; (iii) the establishment of 20:1 voting rights with respect to shares of New Planet Class B common stock, as described herein and in the Proposed Charter; (iv) providing stockholders, until the Sunset Date, the ability to act by written consent in lieu of a meeting, subject to certain requirements as described herein and in the Proposed Charter; (v) changes to the required vote to amend the charter and bylaws; (vi) that certain transactions are not “corporate opportunities” and that certain persons are not subject the doctrine of corporate opportunity; (vii) the elimination of certain provisions specific to dMY IV’s status as a blank check company; and (viii) provide that New Planet will be a public benefit corporation under Delaware law and identify its public benefit as to accelerate humanity toward a more sustainable, secure and prosperous world by illuminating environmental and social change.

What effect will the Proposed Charter’s multi-class structure have on New Planet’s public stockholders?

Shares of New Planet Class B common stock will have 20 votes per share, while shares of New Planet Class A common stock will have one vote per share. Upon the consummation of the Business Combination, the Planet Founders will hold all of the issued and outstanding shares of New Planet Class B common stock. Accordingly, upon the consummation of the Business Combination and, assuming no redemptions by our public stockholders, the Planet Founders will hold over approximately 65% of the voting power of New Planet’s capital stock and will be able to control matters submitted to New Planet’s stockholders for approval, including the election of directors, amendments of its organizational documents and any merger, consolidation, sale of all or substantially all of its assets or other major corporate transactions. Additionally, the Planet Founders will receive additional shares of New Planet Class B common stock for any Contingent Consideration issued in respect of their ownership of Planet Class B common stock held immediately prior to the Mergers. The Planet Founders may have interests that differ from yours and may vote in a way with which you disagree and which may be adverse to your interests. This concentrated control may have the effect of delaying, preventing or deterring a change in control of New Planet, could deprive our stockholders of an opportunity to receive a premium for their capital stock as part of a sale of New Planet, and might ultimately affect the market price of shares of New Planet Class A common stock. For information about our multi-class structure, see the section titled “Description of New Planet Securities.”

What effect will New Planet being a public benefit corporation under Delaware law have on New Planet’s public stockholders?

Unlike traditional corporations, which have a fiduciary duty to focus exclusively on maximizing stockholder value, as a Delaware public benefit corporation, New Planet’s directors will have a fiduciary duty to consider not only the stockholders’ interests, but also the company’s specific public benefit and the interests

What material negative factors did the dMY IV Board consider in connection with the Business Combination?

Although the dMY IV Board believes that the acquisition of Planet will provide dMY IV’s stockholders with an opportunity to participate in a combined company with significant growth potential, market share and a well-known brand, the board of directors did consider certain potentially material negative factors in arriving at that conclusion, such as the risk that dMY IV Stockholders would not approve the Business Combination and the risk that significant numbers of dMY IV Stockholders would exercise their redemption rights. In addition, during the course of dMY IV management’s evaluation of Planet’s operating business and its public company potential, management conducted detailed due diligence on certain potential challenges. Some factors that both dMY IV management and the board of directors considered were (i) risks associated with successful implementation of Planet’s long term business plan and strategy and Planet realizing the anticipated benefits of the Business Combination on the timeline expected or at all, (ii) the corporate governance provisions of the Proposed Charter and the effect of those provisions on the governance of New Planet, including that the Planet Founders will each hold common stock carrying 20 votes per share, subject to certain transfer restrictions and sunset provisions in the Proposed Charter, (iii) the inherent limitations in the due diligence review of Planet conducted by the dMY IV management team and dMY IV’s outside advisors and that dMY IV did not obtain a fairness opinion from an independent investment banking firm, (iv) the potential inability to complete the Mergers, (v) the possibility of litigation challenging the Business Combination, and (vii) that some of our officers and directors may have interests in the Business Combinations as individuals that are in addition to, and that may be different from, the interests of Company stockholders and that Goldman Sachs & Co. LLC (“Goldman”), as dMY IV’s underwriter in its initial public offering, is acting as Planet’s financial advisor and a co-placement agent of the PIPE Financing. The Board also weighed the risk around the multi-class structure (with “super-voting” rights for Planet Founders), which already existed at Planet with the long-term benefits that a founder-controlled company would provide to dMY IV Stockholders and future stockholders of Planet after Closing.

Did the Board obtain a third-party valuation or fairness opinion in determining whether or not to proceed with the Mergers?

No. The Board did not obtain a fairness opinion with respect to the consideration to be paid in the Mergers. The officers and directors of dMY IV have substantial experience in evaluating the operating and financial merits of companies from a wide range of industries, including the technology sector, and concluded that their experience and background enabled them to make the necessary analyses and determinations regarding the Business Combination. Accordingly, investors will be relying solely on the judgment of the Board and dMY IV’s advisors in valuing Planet’s business.

Do I have redemption rights?

If you are a public stockholder, you have the right to request that dMY IV redeem all or a portion of your public shares for cash, provided that you follow the procedures and deadlines described elsewhere in this proxy statement/prospectus under the heading “The Special Meeting — Redemption Rights.” Public stockholders may elect to redeem all or a portion of their public shares even if they vote for the Business Combination Proposal. We sometimes refer to these rights to elect to redeem all or a portion of the public shares into a pro rata portion of the cash held in the Trust Account as “redemption rights.” If you wish to exercise your redemption rights, please see the answer to the next question: “How do I exercise my redemption rights?”

How do I exercise my redemption rights?

If you are a public stockholder and wish to exercise your right to redeem your public shares, you must:

(a) hold public shares or (b) hold public shares through units and elect to separate your units into the underlying public shares and public warrants prior to exercising your redemption rights with respect to the public shares; and

prior to 5:00 p.m., New York City time, on December 1, 2021, (a) submit a written request to Continental that dMY IV redeem your public shares for cash and (b) deliver your public shares to Continental, physically or electronically through DTC.

If I am a holder of units, can I exercise redemption rights with respect to my units?

No. Holders of outstanding units must elect to separate the units into the underlying public shares and public warrants prior to exercising redemption rights with respect to the public shares. If you hold your units in an account at a brokerage firm or bank, you must notify your broker or bank that you elect to separate the units into the underlying public shares and public warrants, or if you hold units registered in your own name, you must contact Continental, dMY IV’s transfer agent, directly and instruct them to do so. The redemption rights include the requirement that a holder must identify itself in writing as a beneficial holder and provide its legal name, phone number and address to Continental in order to validly redeem. If you fail to cause your units to be separated and delivered to Continental, dMY IV’s transfer agent, prior to 5:00 p.m., New York City time, on December 1, 2021, you will not be able to exercise your redemption rights with respect to your public shares.

What are the U.S. federal income tax consequences of exercising my redemption rights?

The U.S. federal income tax consequences of exercising your redemption rights depend on your particular facts and circumstances. It is possible that you may be treated as selling your public shares for cash and, as a result, recognize capital gain or capital loss. It is also possible that the redemption may be treated as a distribution for U.S. federal income tax purposes depending on the amount of public shares that you own or

What are the U.S. federal income tax consequences of the Mergers?

The Mergers, taken together, are intended to qualify as a “reorganization” within the meaning of Section 368(a) of the Code. In connection with the filing of this registration statement, Planet is receiving an opinion of counsel, based on customary assumptions and certain representations, warranties and covenants of Planet, dMY IV and First Merger Sub, to the effect that the Mergers, taken together, will qualify as a “reorganization.” It is not, however, a condition to the completion of the Mergers that either Planet or dMY IV receives an opinion of counsel as of the Closing to the effect that the Mergers will so qualify, and the Mergers will occur even if they do not so qualify. No ruling has been, or will be, sought by Planet or dMY IV from the IRS with respect to the Mergers and there can be no assurance that the IRS will not challenge the qualification of the Mergers, taken together, as a “reorganization” under Section 368(a) of the Code or that a court would not sustain such a challenge.

How do the public warrants differ from the private placement warrants and what are the related risks for any public warrant holders post business combination?

What is Planet?

Planet, a Delaware corporation headquartered in San Francisco, California, is a provider of daily data and insights about Earth and aims to use space to help life on Earth. Planet is driven by a mission to image the world every day, and make change visible, accessible and actionable. Founded in 2010 by three NASA scientists, Planet designs, builds, and operates the largest earth observation fleet of imaging satellites. Planet provides data and analytics solutions to over 700 customers across a variety of industries including, agriculture, forestry, defense and intelligence, finance and civil government (among others), enabling users to simply and effectively derive unique value from satellite imagery.

How does the dMY IV Board recommend that I vote?

The dMY IV Board recommends that the dMY IV Stockholders vote “FOR” the approval of the Business Combination Proposal, “FOR” the approval of Charter Proposal A, “FOR” the approval of Charter

What will happen to my dMY IV Common Stock as a result of the Business Combination?

If the Business Combination is completed, (i) each share of dMY IV’s Class A common stock will remain outstanding and continue as a share of New Planet Class A common stock, and (ii) each share of dMY IV’s Class B common stock will automatically become a share of New Planet Class A common stock. See the section entitled “The Merger Agreement—Merger Consideration” beginning on page 127. New Planet Class B common stock will have the same economic terms as the New Planet Class A common stock, but the New Planet Class B common stock will have twenty (20) votes per share (until the Sunset Date).

How does our Sponsor and the other initial stockholders intend to vote their shares?

In connection with our initial public offering, our initial stockholders, the Sponsor, and our officers and directors at the time of our initial public offering entered into a letter agreement to vote their shares in favor of the Business Combination Proposal, and we also expect them to vote their shares in favor of all other proposals being presented at the Special Meeting. In addition, the Sponsor and certain other beneficial owners of dMY IV’s Class B common stock have entered into a support agreement with Planet, pursuant to which they have agreed to vote their shares in favor of the Business Combination (and each of the other proposals to be brought at the Special Meeting). These stockholders, together with our initial stockholders, collectively own approximately 20% of our issued and outstanding shares of dMY IV Common Stock. Accordingly, if all of our outstanding shares were to be voted, we would need the affirmative vote of approximately 30.1% of the remaining shares to approve the Business Combination. If the shares held by the minimum number of stockholders necessary for a quorum for the Special Meeting were to be voted, we would need the additional affirmative vote of shares representing approximately 5% of the outstanding shares in order to approve the Business Combination.

May our Sponsor and the other initial stockholders purchase public shares or warrants prior to the Special Meeting?

At any time prior to the Special Meeting, during a period when they are not then aware of any material nonpublic information regarding dMY IV or its securities, the initial stockholders, Planet and/or its affiliates may purchase shares and/or warrants from investors, or they may enter into transactions with such investors and others to provide them with incentives to acquire public shares or vote their public shares in favor of the Business Combination Proposal. The purpose of such share purchases and other transactions would be to increase the likelihood that (i) the proposals presented for approval at the Special Meeting are approved and/or (ii) dMY IV satisfies the Minimum Proceeds Condition. Any such stock purchases and other transactions may thereby increase the likelihood of obtaining dMY IV Stockholder Approval. This may result in the completion of our Business Combination in a way that may not otherwise have been possible. While the exact nature of any such incentives has not been determined as of the date of this proxy statement/prospectus, they might include, without limitation, arrangements to protect such investors or holders against potential loss in value of their shares, including the granting of put options and the transfer to such investors or holders of shares or rights owned by the initial stockholders for nominal value.

Who is entitled to vote at the Special Meeting?

The dMY IV Board has fixed October 19, 2021 as the record date for the Special Meeting. All holders of record of dMY IV Common Stock as of the close of business on the record date are entitled to receive notice of, and to vote at, the Special Meeting, provided that those shares remain outstanding on the date of the Special Meeting. Physical attendance at the Special Meeting is not required to vote. See the section entitled “Questions and Answers About the Business Combination and the Special Meeting — How can I vote my shares without attending the Special Meeting?” on page 34 for instructions on how to vote your shares of dMY IV Common Stock without attending the Special Meeting.

How many votes do I have?

Each dMY IV Stockholder of record is entitled to one vote for each dMY IV Share held by such holder as of the close of business on the record date. As of the close of business on the record date, there were 43,125,000 outstanding shares of dMY IV Common Stock.

What constitutes a quorum for the Special Meeting?

A quorum is the minimum number of stockholders necessary to hold a valid meeting.

Where will the New Planet Class A common stock that dMY IV Stockholders receive in the Business Combination be publicly traded?

Assuming the Business Combination is completed, the shares of New Planet Class A common stock (including the New Planet Class A common stock issued in connection with the Business Combination) will be listed and traded on the NYSE under the ticker symbol “PL” and the public warrants will be listed and traded on the NYSE under the ticker symbol “PL WS”.

What happens if the Business Combination is not completed?

If the Merger Agreement is not adopted by dMY IV Stockholders or if the Business Combination is not completed for any other reason by 5:00 p.m., New York City time, on February 21, 2022, then we will either seek an extension of time to complete the Business Combination or seek to consummate an alternative initial business combination prior to March 9, 2023 or any extended period of time that we may have to consummate an initial business combination as a result of an amendment to our amended and restated certificate of incorporation (an “Extension Period”). If we do not consummate an initial business combination by March 9, 2023 or during any Extension Period, we will cease all operations except for the purpose of winding up and redeem our public shares and liquidate the Trust Account, in which case our public stockholders may only receive approximately $10.00 per share and our warrants will expire worthless.

How can I attend and vote my shares at the Special Meeting?

dMY IV Common Stock held directly in your name as the stockholder of record of such dMY IV Common Stock as of the close of business on October 19, 2021, the record date, may be voted electronically at the Special Meeting. If you choose to attend the Special Meeting, you will need to visit https://www.cstproxy.com/dmytechnologyiv/2021, and enter the control number found on your proxy card, voting instruction form or notice you previously received. You may vote during the Special Meeting by following instructions available on the meeting website during the meeting. If your shares are held in “street name” by a broker, bank or other nominee and you wish to attend and vote at the Special Meeting, you will not be permitted to attend and vote electronically at the Special Meeting unless you first obtain a legal proxy issued in your name from the record owner. To request a legal proxy, please contact your broker, bank or other nominee holder of record. It is suggested you do so in a timely manner to ensure receipt of your legal proxy prior to the Special Meeting.

How can I vote my shares without attending the Special Meeting?

If you are a stockholder of record of dMY IV Common Stock as of the close of business on October 19, 2021, the record date, you can vote by mail by following the instructions provided in the enclosed proxy card. Please note that if you hold your shares in “street name,” which means your shares are held of record by a broker, bank or nominee, you should contact your broker to ensure that votes related to the shares you beneficially own are properly counted. In this regard, you must provide the broker, bank or nominee with instructions on how to vote your shares, or otherwise follow the instructions provided by your bank, brokerage firm or other nominee.

What is a proxy?

A proxy is a legal designation of another person to vote the stock you own. If you are a stockholder of record of dMY IV Common Stock as of the close of business on the record date, and you vote by phone, by Internet or by signing, dating and returning your proxy card in the enclosed postage-paid envelope, you designate two of dMY IV’s officers as your proxies at the Special Meeting, each with full power to act without the other and with full power of substitution. These two officers are Harry L. You and Niccolo de Masi.

What is the difference between holding shares as a stockholder of record and as a beneficial owner?

If your shares of dMY IV Common Stock are registered directly in your name with Continental you are considered the stockholder of record with respect to those shares, and access to proxy materials is being provided directly to you. If your shares are held in a stock brokerage account or by a bank or other nominee, then you are considered the beneficial owner of those shares, which are considered to be held in street name. Access to proxy materials is being provided to you by your broker, bank or other nominee who is considered the stockholder of record with respect to those shares.

If a dMY IV Stockholder gives a proxy, how will the dMY IV Common Stock covered by the proxy be voted?

If you provide a proxy by returning the applicable enclosed proxy card, the individuals named on the enclosed proxy card will vote your shares of dMY IV Common Stock in the way that you indicate when

How will my dMY IV Common Stock be voted if I return a blank proxy?

If you sign, date and return your proxy and do not indicate how you want your shares of dMY IV Common Stock to be voted, then your shares of dMY IV Common Stock will be voted “FOR” the approval of the Business Combination Proposal, “FOR” the approval of Charter Proposal A, “FOR” the approval of Charter Proposal B, “FOR” the approval, on an advisory basis, of the Advisory Charter Proposals, “FOR” the approval of the Stock Issuance Proposal, “FOR” the approval of the Incentive Plan Proposal, “FOR” the approval of the ESPP Proposal and “FOR” the approval of the Adjournment Proposal.

Can I change my vote after I have submitted my proxy?

Yes. If you are a stockholder of record of dMY IV Common Stock as of the close of business on the record date, you can change or revoke your proxy before it is voted at the meeting in one of the following ways:

submit a new proxy card bearing a later date;

give written notice of your revocation to dMY IV’s Corporate Secretary, which notice must be received by dMY IV’s Corporate Secretary prior to the vote at the Special Meeting; or

vote electronically at the Special Meeting by visiting https://www.cstproxy.com/dmytechnologyiv/2021 and entering the control number found on your proxy card, voting instruction form or notice you previously received. Please note that your attendance at the Special Meeting will not alone serve to revoke your proxy.

Where can I find the voting results of the Special Meeting?

The preliminary voting results are expected to be announced at the Special Meeting. In addition, within four business days following certification of the final voting results, dMY IV will file the final voting results of its Special Meeting with the SEC in a Current Report on Form 8-K.

Are dMY IV Stockholders able to exercise dissenters’ rights or appraisal rights with respect to the matters being voted upon at the Special Meeting?

No. dMY IV Stockholders are not entitled to exercise dissenters’ rights or appraisal rights under Delaware law in connection with the Business Combination. Dissenters’ rights or appraisal rights are unavailable under Delaware law in connection with the Business Combination to holders of dMY IV’s Class A Common Stock because it is currently listed on a national securities exchange and such holders are not required to receive any consideration (other than continuing to hold their shares of dMY IV’s Class A common stock, which will become an equal number of shares of New Planet Class A common stock after giving effect to the Business Combination). Holders of dMY IV’s Class A common stock may vote against the Business Combination Proposal or redeem their dMY IV Common Stock if they are not in favor of the adoption of the Merger Agreement or the Business Combination. Dissenters’ rights or appraisal rights are unavailable under Delaware law in connection with the Business Combination to holders of dMY IV’s Class B Common Stock because they have agreed to vote in favor of the Business Combination.

Are there any risks that I should consider as a dMY IV Stockholder in deciding how to vote or whether to exercise my redemption rights?

Yes. You should read and carefully consider the risk factors set forth in the section entitled “Risk Factors” beginning on page 69. You also should read and carefully consider the risk factors of dMY IV and Planet contained in the documents that are incorporated by reference herein.

What happens if I sell my dMY IV Common Stock before the Special Meeting?

The record date for dMY IV Stockholders entitled to vote at the Special Meeting is earlier than the date of the Special Meeting. If you transfer your shares of dMY IV Common Stock before the record date, you will not be entitled to vote at the Special Meeting. If you transfer your shares of dMY IV Common Stock after the record date but before the Special Meeting, you will, unless special arrangements are made, retain your right to vote at the Special Meeting but will transfer the right to hold New Planet shares to the person to whom you transfer your shares.

When is the Business Combination expected to be completed?

Subject to the satisfaction or waiver of the Closing conditions described in the section entitled “The Merger Agreement — Conditions to Closing” beginning on page 141, including the adoption of the Merger Agreement by the dMY IV Stockholders at the Special Meeting, the Business Combination is expected to close by the end of 2021. However, it is possible that factors outside the control of both dMY IV and Planet could result in the Business Combination being completed at a later time, or not being completed at all.

Who will solicit and pay the cost of soliciting proxies?

dMY IV has engaged a professional proxy solicitation firm, Morrow Sodali (“Morrow”), to assist in soliciting proxies for the Special Meeting. dMY IV has agreed to pay Morrow a fee of $30,000, plus disbursements. dMY IV will reimburse Morrow for reasonable out-of-pocket expenses and will indemnify Morrow and its affiliates against certain claims, liabilities, losses, damages and expenses. dMY IV will also reimburse banks, brokers and other custodians, nominees and fiduciaries representing beneficial owners of our common stock for their expenses in forwarding soliciting materials to beneficial owners of our common stock and in obtaining voting instructions from those owners. dMY IV’s management team may also solicit proxies by telephone, by facsimile, by mail, on the Internet or in person. They will not be paid any additional amounts for soliciting proxies.

What are the conditions to completion of the Business Combination?

The Closing is subject to certain customary conditions, including, among other things: (i) approvals by dMY IV’s stockholders and Planet’s stockholders of the Merger Agreement and the transactions contemplated thereby; (ii) the expiration or termination of the waiting period (or any extension thereof) applicable under the Hart-Scott-Rodino-Antitrust Improvements Act of 1976; (iii) obtainment of the necessary consents from the Federal Communications Commission and National Oceanic and Atmospheric Administration; (iv) that dMY IV has not received valid redemption requests (that have not subsequently been withdrawn) that would require it to redeem dMY IV Class A common stock in an amount that would cause dMY IV not to have at least $5,000,001 of net tangible assets (as determined in accordance with Rule 3a51-1(g)(1) of the Exchange Act); (v) effectiveness of the Registration Statement; (vi) the shares of New Planet Class A common stock to be issued in connection with the Business Combination having been approved for listing on the New York Stock Exchange; (vii) the accuracy of the representations and warranties, covenants and agreements of Planet and dMY IV, respectively, subject to customary materiality qualifications; (viii) the absence of any material adverse effect that is continuing with respect to Planet and dMY IV, respectively, between the date of the Merger Agreement and the date of the Closing; (ix) the absence of any governmental order, statute, rule or

What should I do now?

You should read this proxy statement/prospectus carefully in its entirety, including the annexes, and return your completed, signed and dated proxy card(s) by mail in the enclosed postage-paid envelope or submit your voting instructions by telephone or via the Internet as soon as possible so that your shares of dMY IV Common Stock will be voted in accordance with your instructions.

What should I do if I receive more than one set of voting materials?

Stockholders may receive more than one set of voting materials, including multiple copies of this proxy statement/prospectus and multiple proxy cards or voting instruction cards. For example, if you hold your shares in more than one brokerage account, you will receive a separate voting instruction card for each brokerage account in which you hold shares. If you are a holder of record and your shares are registered in more than one name, you will receive more than one proxy card. Please complete, sign, date and return each proxy card and voting instruction card that you receive in order to cast a vote with respect to all of your shares of dMY IV Common Stock.

Whom do I call if I have questions about the Special Meeting or the Business Combination?

If you have questions about the Special Meeting or the Business Combination, or desire additional copies of this proxy statement/prospectus or additional proxies, you may contact: