AnaptysBio (ANAB) insider Eric Loumeau files to sell 10,000 shares

Rhea-AI Filing Summary

AnaptysBio insider Eric J. Loumeau has filed a Form 144 to sell 10,000 shares of the company’s common stock. The shares are to be sold through Morgan Stanley Smith Barney on NASDAQ, with an indicated aggregate market value of 540000.00, and are part of a class with 27,688,470 shares outstanding.

The 10,000 shares were acquired on 02/11/2026 via a stock option exercise from the issuer, paid in cash on the same date. The filing also lists multiple prior open-market sales of AnaptysBio common stock by Loumeau over the past three months, including 10,000-share blocks sold on 12/17/2025 and 12/22/2025 for gross proceeds of 460000.00 and 510000.00, respectively.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	10000	540000.00	27688470	02/11/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	02/11/2026	Stock Option Exercise	ISSUER			10000	02/11/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
ERIC J LOUMEAU 10770 Wateridge Circle, Suite 210 San Diego CA 92121	Common	01/09/2026	2210	98814.40
ERIC J LOUMEAU 10770 Wateridge Circle, Suite 210 San Diego CA 92121	Common	01/07/2026	7622	348212.59
ERIC J LOUMEAU 10770 Wateridge Circle, Suite 210 San Diego CA 92121	Common	01/07/2026	2017	90980.82
ERIC J LOUMEAU 10770 Wateridge Circle, Suite 210 San Diego CA 92121	Common	01/06/2026	2983	129040.40
ERIC J LOUMEAU 10770 Wateridge Circle, Suite 210 San Diego CA 92121	Common	12/22/2025	10000	510000.00
ERIC J LOUMEAU 10770 Wateridge Circle, Suite 210 San Diego CA 92121	Common	12/18/2025	141	6625.59
ERIC J LOUMEAU 10770 Wateridge Circle, Suite 210 San Diego CA 92121	Common	12/17/2025	10000	460000.00
ERIC J LOUMEAU 10770 Wateridge Circle, Suite 210 San Diego CA 92121	Common	12/16/2025	12500	560800.25

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the Form 144 filing for ANAB disclose about Eric J. Loumeau?

The Form 144 shows that Eric J. Loumeau plans to sell 10,000 shares of AnaptysBio common stock. These shares were acquired via stock option exercise on February 11, 2026 and will be sold through Morgan Stanley Smith Barney on NASDAQ.

How many ANAB shares does Eric J. Loumeau plan to sell under this Form 144?

Eric J. Loumeau plans to sell 10,000 shares of AnaptysBio common stock. The filing shows an aggregate market value of $540,000 for this planned sale, based on the figures provided, and notes that 27,688,470 shares of this class are outstanding.

How did Eric J. Loumeau acquire the 10,000 ANAB shares to be sold?

The 10,000 AnaptysBio shares were acquired through a stock option exercise on February 11, 2026. The filing states the shares were obtained from the issuer, with 10,000 securities acquired and the purchase price paid in cash on the same date.

What prior ANAB stock sales by Eric J. Loumeau are disclosed in the last three months?

The filing lists several prior sales of AnaptysBio common stock by Eric J. Loumeau in the past three months. These include 10,000 shares sold on December 17, 2025 for $460,000 and another 10,000 shares sold on December 22, 2025 for $510,000, among additional smaller transactions.

Which broker and exchange are involved in Eric J. Loumeau’s planned ANAB share sale?

The planned sale will be executed through Morgan Stanley Smith Barney LLC Executive Financial Services. The Form 144 specifies that the 10,000 AnaptysBio common shares are intended to be sold on the NASDAQ exchange, using that broker’s New York office as listed.

What representation does the ANAB insider make in signing the Form 144 notice?

By signing the notice, the insider represents that they do not know any material adverse information about AnaptysBio’s current or prospective operations that has not been publicly disclosed. This representation also applies as of any trading plan adoption date if relying on Rule 10b5-1.