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The Three Rivers Holding Corp. 1997 Stock Option Plan

The Alliance Imaging, Inc. 1997 Stock Option Plan

(Full title of the plans)

Richard W. Johns

Chief Operating Officer and Chief Legal Officer

Alliance HealthCare Services, Inc.

18201 Von Karman Avenue, Suite 600

Irvine, CA 92612

(949) 242-5300

Copy To:

Charles K. Ruck

Joshua M. Dubofsky

Latham & Watkins LLP

650 Town Center Drive, 20 ^th Floor

Costa Mesa, California 92626

(714) 540-1235

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definition of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. Check one:

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.  ☐

DEREGISTRATION OF SECURITIES

These Post-Effective Amendments (these “ Post-Effective Amendments ”) relate to the following registration statements of Alliance HealthCare Services, Inc. (“ Alliance ”) filed with the Securities and Exchange Commission on Form S-8 (the “ Registration Statements ”):

On August 21, 2017, pursuant to the terms of the Agreement and Plan of Merger, dated as of April 10, 2017, by and among Alliance, Tahoe Investment Group Co., Ltd., an entity organized under the laws of the People’s Republic of China (“ Tahoe ”), THAIHOT Investment Company Limited, an exempted company incorporated under the laws of the Cayman Islands and indirect wholly owned subsidiary of Tahoe, THAIHOT Investment Company US Limited, a Delaware corporation and indirect wholly owned subsidiary of Tahoe (“ Parent ”), and Alliance Healthcare Services Merger Sub Limited, a Delaware corporation and wholly owned subsidiary of Parent (“ Sub ”), Sub merged with and into Alliance, and Alliance became a wholly owned subsidiary of Parent (the “ Merger ”). As a result of the Merger, any offering pursuant to the Registration Statements has been terminated and Alliance hereby terminates the effectiveness of the Registration Statements. In accordance with an undertaking made by Alliance in the Registration Statements to remove from registration, by means of a post-effective amendment, any of the securities registered under each Registration Statement that remain unsold at the termination of the offerings, Alliance hereby removes from registration the securities registered but unsold under the Registration Statements, if any.