Exhibit 2.1
THIRD AMENDMENT TO THE BUSINESS COMBINATION AGREEMENT
This Third Amendment to the Business Combination Agreement (this Amendment or the Third Amendment) is
entered into as of May 3, 2024, by and among OpSec Holdings, a Cayman Islands exempted company incorporated with limited liability and having its registered office at Paget-Brown Financial Services Limited, Century Yard, Cricket Square, P.O.
Box 1111, George Town, Grand Cayman KY1-1102, Cayman Islands (Pubco), Orca Holdings Limited, a Cayman Islands exempted company incorporated with limited liability and having its registered
office at Paget-Brown Financial Services Limited, Century Yard, Cricket Square, P.O. Box 1111, George Town, Grand Cayman KY1-1102, Cayman Islands (the Company), Investcorp Technology
Secondary Fund 2018, L.P., a Cayman Islands exempted limited partnership (ITSF), Mill Reef Capital Fund SCS, a limited partnership (société en commandite
simple) organized under the laws of Luxembourg (Mill Reef, and together with ITSF, the Company Shareholders), and Investcorp Europe Acquisition Corp I, a Cayman Islands exempted company incorporated with
limited liability, with registered number 373300 and whose registered office is at Paget-Brown Financial Services Limited, Century Yard, Cricket Square, P.O. Box 1111, George Town, Grand Cayman KY1-1102,
Cayman Islands (SPAC, together with Pubco, the Company and the Company Shareholders, collectively, the Parties and individually a Party).
RECITALS
WHEREAS,
the Parties entered into that certain Business Combination Agreement, dated as of April 25, 2023 (the Original Business Combination Agreement), by and among the Parties, Opal Merger Sub I, a Cayman Islands exempted company
incorporated with limited liability and having its registered office at Paget-Brown Financial Services Limited, Century Yard, Cricket Square, P.O. Box 1111, George Town, Grand Cayman KY1-1102, Cayman Islands,
and wholly-owned Subsidiary of Pubco, Opal Merger Sub II, a Cayman Islands exempted company incorporated with limited liability and having its registered office at Paget-Brown Financial Services Limited, Century Yard, Cricket Square, P.O. Box 1111,
George Town, Grand Cayman KY1-1102, Cayman Islands, and wholly-owned Subsidiary of Pubco, Orca Midco Limited, a private limited company incorporated under the Laws of England and Wales having its registered
office at 40 Phoenix Road, Washington, Tyne & Wear, United Kingdom, NE38 0AD (Orca Midco), and Orca Bidco Limited, a private limited company incorporated under the Laws of England and Wales and a Subsidiary of the Company
(Orca), as amended by that certain First Amendment to the Business Combination Agreement, dated as of December 14, 2023 (the First Amendment), and as amended by that certain Second Amendment to the Business
Combination Agreement, dated as of March 10, 2024 (the Second Amendment and, the Original Business Combination Agreement, as amended by the First Amendment and the Second Amendment, the Business Combination
Agreement);
WHEREAS, capitalized terms used but not defined herein shall have the meanings assigned to them in the
Business Combination Agreement;
WHEREAS, Orca Midco has entered into the Divestiture Agreement, which provides, among other
things, for the disbursement of the Purchase Price as contemplated by the Second Amendment, and SPAC is a third-party beneficiary of the Divestiture Agreement;