# EDGAR Filing Document

**Accession Number:** 0001496671
**File Stem:** 0001193125-23-070124
**Filing Date:** 2023-3
**Character Count:** 7282
**Document Hash:** 04f7cac4fb02916965c564236e4a9ac3
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-23-070124.hdr.sgml**: 20230314

**ACCESSION NUMBER**: 0001193125-23-070124

**CONFORMED SUBMISSION TYPE**: POS AM

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230314

**DATE AS OF CHANGE**: 20230314

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Calithera Biosciences, Inc.
- **CENTRAL INDEX KEY:** 0001496671
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **IRS NUMBER:** 272366329
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** POS AM
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-243731
- **FILM NUMBER:** 23730675

**BUSINESS ADDRESS:**
- **STREET 1:** 343 OYSTER POINT BLVD #200
- **CITY:** SOUTH SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94080
- **BUSINESS PHONE:** 650-870-1000

**MAIL ADDRESS:**
- **STREET 1:** 343 OYSTER POINT BLVD #200
- **CITY:** SOUTH SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94080

**As filed with the Securities and Exchange Commission on March 14, 2023** 

**Registration No. 333-243731** 

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**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

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**POST-EFFECTIVE AMENDMENT NO. 1 TO** 

**FORM S-3** 

**REGISTRATION STATEMENT NO. 333-243731** 

***UNDER***

***THE SECURITIES ACT OF 1933***

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## Calithera Biosciences, Inc.
**(Exact name of registrant as specified in its charter)** 

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| | |
|:---|:---|
| **Delaware** | **27-2366329** |
| **(State or other jurisdiction of**<br> **incorporation or organization)** | **(I.R.S. Employer**<br> **Identification Number)** |

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**343 Oyster Point Blvd., Suite 200** 

**South San Francisco, California 94080** 

**(Address, including zip code, and telephone number, including area code, of registrant's principal executive offices)** 

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**Susan M. Molineaux, Ph.D.** 

**President and Chief Executive Officer** 

**343 Oyster Point Blvd., Suite 200** 

**South San Francisco, California 94080** 

**(650) 870-1000** 

**(Name, address, including zip code, and telephone number, including area code, of agent for service)** 

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***Copies to:***

**John T. McKenna** 

**Cooley LLP** 

**3175 Hanover Street** 

**Palo Alto, California 94304** 

**(650) 843-5000** 

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**Approximate date of commencement of proposed sale to the public:** Not Applicable. The registrant is filing this post-effective amendment to remove from registration any securities registered hereunder that remain unsold.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box. ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box. ☐

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☐

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act.

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| | | | |
|:---|:---|:---|:---|
| Large accelerated filer | ☐ | Accelerated filer | ☐ |
| Non-accelerated filer | ☒ | Smaller reporting company | ☒ |
|  |  | Emerging growth company | ☐ |

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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. ☐

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**TERMINATION OF REGISTRATION** 

This Post-Effective Amendment No. 1 (this "***Post-Effective Amendment***"), relates to the registration statement on Form S-3, Registration No. 333-243731 (the "***Registration Statement***"), filed by Calithera Biosciences, Inc. (the "***Company***") on August 10, 2020, with the Securities and Exchange Commission to register the sale from time to time of up to $250,000,000 in total of the following securities: (i) debt securities; (ii) the Company's common stock, par value $0.0001; (iii) the Company's preferred stock, par value $0.0001; and (iv) warrants for any of the foregoing securities (collectively, the "***Registered Securities***"). The Registration Statement was declared effective on August 19, 2020.

On January 9, 2023, Calithera Biosciences, Inc. announced that our Board of Directors had unanimously approved the dissolution and liquidation of Calithera Biosciences, Inc. pursuant to a plan of complete liquidation and dissolution, subject to stockholder approval. Therefore, the Company has determined to terminate the offerings of Registered Securities under the Registration Statement. Accordingly, the Company is filing this Post-Effective Amendment to terminate the effectiveness of the Registration Statement, and, in accordance with the undertakings made by the Company in the Registration Statement, to remove from registration any and all of the Registered Securities that remain unsold as of the date hereof. The Registration Statement is hereby amended, as appropriate, to reflect the deregistration of all such securities.

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**SIGNATURES** 

Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this Post-Effective Amendment No. 1 to the Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of South San Francisco, State of California, on March 14, 2023.

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| | |
|:---|:---|
| **CALITHERA BIOSCIENCES, INC.** | **CALITHERA BIOSCIENCES, INC.** |
| By: | /S/ SUSAN M. MOLINEAUX, PH.D. |
|  | Name: Susan M. Molineaux, Ph.D. |
|  | Title: President and Chief Executive Officer |

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Pursuant to Rule 478 under the Securities Act of 1933, as amended, no other person is required to sign this Post-Effective Amendment No. 1 to the Registration Statement.