[Form 4] 10x Genomics, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Serge Saxonov, Chief Executive Officer and Director of 10x Genomics (TXG), filed a Form 4 reporting a transaction dated 09/12/2025 in which 900 shares of Class A common stock were disposed (code G). After the reported transaction, Mr. Saxonov directly beneficially owns 1,034,817 shares of Class A common stock. The filing also discloses substantial indirect and convertible holdings held in multiple trusts for which he serves as trustee, including convertible Class B shares that can convert into Class A shares and derivative holdings underlying 1,192,040 and 1,750,000 Class A shares as reported. Footnotes identify transfers on July 18, 2025 and several irrevocable trusts (each holding 250,000 shares) for which he is sole trustee, indicating estate or trust structuring of substantial ownership.

Positive

• Continued substantial ownership: Reporting person retains direct beneficial ownership of 1,034,817 Class A shares and significant convertible/derivative exposure.
• Ownership structured via trusts: Multiple trusts (Andromeda, Sirius, Y/S Descendants', Y/S Pot, seven 2018 irrevocable trusts) hold shares with the reporting person serving as trustee, indicating planned estate/trust structuring.

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Routine insider gift and trust transfers reflect ownership structuring, not a change in control.

The Form 4 shows a small disposition of 900 Class A shares coded as a gift and multiple transfers among trusts where the reporting person is trustee. The filing emphasizes indirect beneficial ownership via several trusts and the existence of convertible Class B shares that convert to Class A shares on transfer or at the holder's option. These entries are consistent with estate planning and governance structuring rather than operational or governance changes at the company. No departures, new grants, or material dilutive events are disclosed.

Securities Analyst

TL;DR: Insider retains substantial economic and voting exposure through direct and indirect holdings.

Post-transaction, Mr. Saxonov directly holds 1,034,817 Class A shares and the filing documents convertible Class B and derivative positions that underlie material additional Class A exposure (notably 1,192,040 and 1,750,000 shares in different entries). The movement of 89,825 shares referenced in footnotes and multiple irrevocable trusts each holding 250,000 shares suggest ongoing ownership concentration and internal transfers among family/trust vehicles. The small 900-share disposition is immaterial relative to total holdings and does not indicate a shift in his economic stake.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Saxonov Serge

(Last) (First) (Middle)

10X GENOMICS, INC.

6230 STONERIDGE MALL ROAD

(Street)

PLEASANTON CA 94588

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
10x Genomics, Inc. [ TXG ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

3. Date of Earliest Transaction (Month/Day/Year)
09/12/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	09/12/2025		G		900	D	$0	1,034,817	D
Class A Common Stock								27	I	See footnote(1)
Class A Common Stock								0(2)	I	See footnote(3)
Class A Common Stock								213,250	I	See footnote(4)
Class A Common Stock								58,000	I	See footnote(5)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Class B Common Stock	(6)							(6)	(6)	Class A Common Stock	1,192,040		1,192,040(7)	D
Class B Common Stock	(6)							(6)	(6)	Class A Common Stock	89,825		89,825	I	See footnote(3)
Class B Common Stock	(6)							(6)	(6)	Class A Common Stock	1,750,000		1,750,000	I	See footnote(8)

Explanation of Responses:

1. The shares are held by the Andromeda Trust, for which the Reporting Person serves as trustee.

2. Reflects transfer of 89,825 shares of Class A Common Stock to the Reporting Person on July 18, 2025.

3. The shares are held by the Sirius Trust, for which the Reporting Person serves as trustee.

4. The shares are held by the Y/S Descendants' Trust, for which the Reporting Person serves as trustee.

5. The shares are held by the Y/S Pot Trust, for which the Reporting Person serves as trustee.

6. Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Additionally, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon transfer, whether or not for value (subject to certain exceptions) and upon the occurrence of certain other events set forth in the Issuer's Amended and Restated Certificate of Incorporation.

7. Reflects transfer of 89,825 shares of Class B Common Stock to Sirius Trust on July 18, 2025.

8. 250,000 shares are held by each of Polaris 2018 Irrevocable Trust, Antares 2018 Irrevocable Trust, Arcturus 2018 Irrevocable Trust, FLY 2018 Irrevocable Trust, LY 2018 Irrevocable Trust, MS 2018 Irrevocable Trust and NS 2018 Irrevocable Trust, of which the Reporting Person is the sole trustee.

	/s/ Eric S. Whitaker, as Attorney-in-Fact for Serge Saxonov	09/16/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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FAQ

What transaction did Serge Saxonov report on Form 4 for TXG?

The Form 4 reports a disposition of 900 Class A shares (transaction code G) on 09/12/2025, recorded as a gift.

How many Class A shares does Serge Saxonov directly own after the reported transaction?

After the reported transaction Mr. Saxonov directly beneficially owns 1,034,817 Class A shares.

Does the filing indicate indirect holdings or trusts for Serge Saxonov?

Yes. The filing lists multiple trusts (Andromeda Trust, Sirius Trust, Y/S Descendants' Trust, Y/S Pot Trust and several 2018 irrevocable trusts) that hold shares for which he serves as trustee.

Are there convertible or derivative holdings disclosed in the Form 4?

Yes. The filing discloses convertible Class B common stock (convertible into Class A) and derivative positions underlying 1,192,040 and 1,750,000 Class A shares as reported.

Were there any transfers noted prior to the 09/12/2025 transaction?

Footnotes state transfers on July 18, 2025, including transfer of 89,825 shares of Class A to the reporting person and 89,825 Class B shares to the Sirius Trust.