Eric J. Loumeau - 11 Feb 2026 Form 4 Insider Report for ANAPTYSBIO, INC (ANAB)

Reporting relationship: CHIEF LEGAL OFFICER
Issuer ticker: ANAB
Reported as of: 11 Feb 2026
Net transaction value: -$243,000
SEC form: 4
Accepted by SEC: 13 Feb 2026, 16:05:06 UTC
Prior SEC filing: 09 Jan 2026
Source filing: View source filing
Reporting owner signature: /s/ Eric Loumeau

Key filing fact

Eric J. Loumeau filed Form 4 for ANAPTYSBIO, INC (ANAB) on 13 Feb 2026.

Key facts

This page summarizes Eric J. Loumeau's Form 4 filing for ANAPTYSBIO, INC (ANAB).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 13 Feb 2026, 16:05.

Change

Previous filing in this sequence was filed on 09 Jan 2026.
Current net transaction value: -$243,000.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001239648 Primary reporting owner

LOUMEAU ERIC J

Relationship: CHIEF LEGAL OFFICER
Address: C/O ANAPTYSBIO, INC., 10770 WATERIDGE CIRCLE, SUITE 210, SAN DIEGO
Signature: /s/ Eric Loumeau
Signature date: 13 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ANAB transaction

Common Stock

Options Exercise

Transaction value: $297,000
Shares: +10,000
Change %: +78%
Price: $29.70
Shares after: 22,835
Date: 11 Feb 2026
Ownership: Direct

ANAB transaction

Common Stock

Sale

Transaction value: $540,000
Shares: -10,000
Change %: -44%
Price: $54.00
Shares after: 12,835
Date: 11 Feb 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ANAB transaction Derivative

Employee Stock Option (right to buy)

Options Exercise

Transaction value: $0
Shares: -10,000
Change %: -22%
Price: $0.000000
Shares after: 35,000
Date: 11 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 10,000
Exercise price: $29.70
Footnotes: F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 3 footnotes

Footnote F1

The transactions reported on this Form 4 were effected pursuant to a 10b5-1 trading plan adopted by the reporting person dated April 11, 2025.

Footnote F2

The stock option is fully vested.

Footnote F3

In addition to the options to purchase a total of 35,000 shares of common stock as set forth in Table II, the Reporting Person also holds additional options to purchase up to an aggregate of 436,010 shares of common stock, which options vest according to their terms.