# EDGAR Filing Document

**Accession Number:** 0001370053
**File Stem:** 0001193125-26-277505
**Filing Date:** 2026-6
**Character Count:** 7289
**Document Hash:** 10aebcc300d2fa3914607b1e771d8871
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-277505.hdr.sgml**: 20260622

**ACCESSION NUMBER**: 0001193125-26-277505

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 9

**CONFORMED PERIOD OF REPORT**: 20260615

**ITEM INFORMATION**: Entry into a Material Definitive Agreement

**FILED AS OF DATE**: 20260622

**DATE AS OF CHANGE**: 20260622

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ANAPTYSBIO, INC
- **CENTRAL INDEX KEY:** 0001370053
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 203828755
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-37985
- **FILM NUMBER:** 261107018

**BUSINESS ADDRESS:**
- **STREET 1:** 10770 WATERIDGE CIRCLE, SUITE 210
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92121
- **BUSINESS PHONE:** 858-362-6295

**MAIL ADDRESS:**
- **STREET 1:** 10770 WATERIDGE CIRCLE, SUITE 210
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92121

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ANAPTYSBIO INC
- **DATE OF NAME CHANGE:** 20080828

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ANAPTYS BIOSCIENCES INC
- **DATE OF NAME CHANGE:** 20060724

?xml version='1.0' encoding='ASCII'? 8-K

**UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549**

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## FORM 8-K

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**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934**

**Date of Report (Date of earliest event reported):** June 15, 2026<br>

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ANAPTYSBIO, INC.

**(Exact name of Registrant as Specified in Its Charter)**

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| | | |
|:---|:---|:---|
| Delaware | 001-37985 | 20-3828755 |
| **(State or Other Jurisdiction<br>of Incorporation)** | **(Commission File Number)** | **(IRS Employer<br>Identification No.)** |
| 10770 Wateridge Circle, Suite 210 |  |  |
| San Diego**,** California |  | 92121 |
| **(Address of Principal Executive Offices)** |  | **(Zip Code)** |

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**Registrant's Telephone Number, Including Area Code:** 858 362-6295<br>

N/A<br>

**(Former Name or Former Address, if Changed Since Last Report)**

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Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

**Securities registered pursuant to Section 12(b) of the Act:**

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| | |
|:---|:---|
| **<br>Title of each class** | **<br>Name of each exchange on which registered** |
| Common stock, par value $0.001 per share<br> ANAB | The Nasdaq Stock Market LLC |

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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

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 13(a) of the Exchange Act. ☐

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## Item 1.01 Entry into a Material Definitive Agreement.
On June 15, 2026, AnaptysBio, Inc. (the "Company"), entered into a Sublease Agreement (the "Sublease") with First Tracks Biotherapeutics, Inc., a Delaware corporation ("First Tracks"), pursuant to which the Company agreed to sublease to First Tracks approximately 45,057 rentable square feet of space located at 10770 Wateridge Circle, San Diego, California 92121 (the "Premises"). The Premises are currently leased by the Company from Wateridge Property Owner, LP, a Delaware limited partnership (the "Master Landlord"), pursuant to the Lease dated May 4, 2020, as amended by the First Amendment to Lease Agreement dated April 5, 2021 (collectively, the "Master Lease").

The term of the Sublease commenced on June 15, 2026, and continues for a period of twelve (12) months from commencement (the "Sublease Term"). First Tracks has the option to extend the Sublease Term for a renewal period commencing on the first day following the expiration of the initial Sublease Term and continuing until the earlier of (a) April 4, 2028, or (b) twelve months from the commencement of the renewal term, subject to delivery of written notice to the Company at least three months prior to the expiration of the initial Sublease Term. First Tracks also has the right to terminate the Sublease at any time during the Sublease Term upon at least three months' prior written notice to the Company.

Under the Sublease, First Tracks is obligated to pay as monthly rent an amount equal to the monthly Basic Rent (as designated in the Master Lease) owed by the Company under the Master Lease, plus Additional Rent (as defined in the Master Lease) due under the Master Lease, payable in advance on the first day of each month during the Sublease Term. First Tracks is also responsible for any charges actually incurred for services requested by First Tracks that the Company is liable to the Master Landlord for under the Master Lease. The Company remains responsible for the timely payment of Basic Rent and Additional Rent under the Master Lease and for otherwise complying with its obligations under the Master Lease except to the extent assumed by First Tracks.

The Sublease is subordinate to the Master Lease, and First Tracks has agreed to comply with the applicable terms and provisions of the Master Lease as incorporated into the Sublease.

The Company has covenanted that it will not surrender or terminate the Master Lease prior to its scheduled expiration date without the consent of First Tracks (other than in connection with the exercise of its Termination Option (as defined in the Master Lease)), and will not amend or modify the Master Lease in any manner that would materially and adversely affect First Tracks' rights or obligations under the Sublease. If the Company's tenancy or right to possession under the Master Lease terminates for any reason, the Sublease will immediately cease and terminate.

The foregoing description of the Sublease does not purport to be complete and is subject to, and qualified in its entirety by, the full text of the Sublease, a copy of which will be filed with the Company's transition report on Form 10-K/T for the transition period from January 1, 2026 to June 30, 2026.

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**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | | | |
|:---|:---|:---|:---|
|  |  |  | **ANAPTYSBIO, INC.** |
| Date: | June 22, 2026 | By:  | /s/ Christopher M. Murphy |
|  |  |  | Name: Christopher M. Murphy<br>Title: Chief Financial Officer |

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