TXG Genomics (NASDAQ: TXG) Serge Saxonov lists recent Class A sales in Form 144

Rhea-AI Filing Summary

TXG Genomics insider Serge Saxonov filed a Form 144 disclosing proposed sales of Class A Common shares. The notice lists multiple recently vested RSU lots and an option exercise as the source of shares, and shows four dispositions in Mar–Apr 2026 with specific share counts and proceeds.

Insights

Corporate Governance / Insider Transactions

Form 144 lists proposed Class A Common sales and recent insider dispositions.

The filing shows Serge Saxonov as the reporting person, with multiple RSU vesting entries (including 05/21/2026 and 08/21/2023) and an Option Exercise of 913 shares on 04/01/2019. Four cash dispositions are recorded in the excerpt.

Cash‑flow treatment is from the insider sales; the filing lists specific trade dates and proceeds for each disposition in Mar–Apr 2026. Subsequent SEC filings or broker confirmations will show whether proposed sales were executed under the listed methods.

Key Figures

Disposition on 03/02/2026: 16,152 shares Disposition on 03/23/2026: 10,000 shares Disposition on 03/24/2026: 5,000 shares +4 more

7 metrics

Disposition on 03/02/2026 16,152 shares cash disposition with proceeds $367,096.23

Disposition on 03/23/2026 10,000 shares cash disposition with proceeds $191,296.77

Disposition on 03/24/2026 5,000 shares cash disposition with proceeds $97,611.67

Disposition on 04/14/2026 5,000 shares cash disposition with proceeds $122,783.81

RSU vesting example 10,718 shares RSU vesting dated 05/21/2026 listed as source

RSU vesting example 16,437 shares RSU vesting dated 08/21/2023 listed as source

Option exercise 913 shares Option Exercise dated 04/01/2019

Key Terms

Form 144, RSU Vesting, Option Exercise

3 terms

Form 144 regulatory

"filed a Form 144 disclosing proposed sales"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

RSU Vesting financial

"RSU Vesting | Issuer | 05/21/2026 | 10718"

RSU vesting is the process by which restricted stock units — a promise by a company to give shares to an employee — become actual, owned shares over time or when certain goals are met. Investors care because vested shares can dilute existing ownership when issued, and the timing of vesting affects when employees can sell shares, which can influence share supply, insider selling patterns, and company incentives.

Option Exercise financial

"Option Exercise | Issuer | 04/01/2019 | 913"

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
Class A Common	JP Morgan Securities LLC 270 Park Avenue, 10th Floor New York NY 10017	40718	964202.24	116877317	05/26/2026	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 *
Class A Common	05/21/2026	RSU Vesting	Issuer			10718	05/21/2026	Compensation
Class A Common	05/21/2024	RSU Vesting	Issuer			23	05/21/2024	Compensation
Class A Common	08/21/2024	RSU Vesting	Issuer			6285	08/21/2024	Compensation
Class A Common	08/21/2023	RSU Vesting	Issuer			16437	08/21/2023	Compensation
Class A Common	11/21/2024	RSU Vesting	Issuer			6342	11/21/2024	Compensation
Class A Common	04/01/2019	Option Exercise	Issuer			913	04/01/2019	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
Serge Saxonov Care of TXG Genomics Inc 6230 Stoneridge Mall Road Pleasanton CA 94588	Class A Common	03/02/2026	16152	367096.23
Serge Saxonov Care of TXG Genomics Inc 6230 Stoneridge Mall Road Pleasanton CA 94588	Class A Common	03/23/2026	10000	191296.77
Serge Saxonov Care of TXG Genomics Inc 6230 Stoneridge Mall Road Pleasanton CA 94588	Class A Common	03/24/2026	5000	97611.67
Serge Saxonov Care of TXG Genomics Inc 6230 Stoneridge Mall Road Pleasanton CA 94588	Class A Common	04/14/2026	5000	122783.81

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

Who filed the Form 144 for TXG Genomics?

The Form 144 was filed by Serge Saxonov care of TXG Genomics Inc at a Pleasanton, CA address. The filing names him as the reporting person and lists Class A Common as the security.

What recent insider sales does the TXG Form 144 show?

The excerpt lists four dispositions: 16,152 shares on 03/02/2026, 10,000 shares on 03/23/2026, 5,000 shares on 03/24/2026, and 5,000 shares on 04/14/2026, each with cash proceeds stated.

What sources of shares are listed for the proposed sales?

The filing lists multiple RSU vesting entries (examples: 05/21/2026 with 10,718 shares; 08/21/2023 with 16,437 shares) and an Option Exercise of 913 shares dated 04/01/2019 as sources.

Are proceeds for the recent sales disclosed in the Form 144 excerpt?

Yes. The excerpt shows dollar proceeds for each recorded disposition, for example $367,096.23 for 16,152 shares on 03/02/2026 and $191,296.77 for 10,000 shares on 03/23/2026.