Amplitude CEO Skates's spouse sells 6,951 shares

The sales were conducted under a Rule 10b5-1 plan adopted by the spouse on June 11, 2026.

Rhea-AI Filing Summary

Amplitude, Inc. reported that shares held indirectly by the spouse of CEO and President Spenser Skates were converted and sold. On October 26, 2026, 300 Class B shares converted one-for-one into Class A shares; 100 Class A shares were sold at $17.4500 and 200 at $17.4700. On October 28, 2026, 6,651 Class B shares converted one-for-one and 6,651 Class A shares were sold at a weighted average price of $17.5258, across trades ranging from $17.4500 to $17.7800. The sales were made under the spouse's Rule 10b5-1 trading plan adopted June 11, 2026.

Insider Trade Summary 10b5-1

Exercise and sale activity reported; no spread calculated

Exercise and Sale 8 txns

Insider Skates Spenser

Role CEO and President

Sold 6,951 shs ($122K)

Approx. gross sale proceeds $122K

Type	Security	Shares	Price	Value
Conversion	Class B Common Stock F1	6,651	$0.00	$0.00
Conversion	Class A Common Stock F1	6,651	$0.00	$0.00
Sale	Class A Common Stock F2, F3	6,651	$17.5258	$117K
Conversion	Class B Common Stock F1	300	$0.00	$0.00
Conversion	Class A Common Stock F1	300	$0.00	$0.00
Sale	Class A Common Stock F2	100	$17.45	$2K
Sale	Class A Common Stock F2	200	$17.47	$3K
holding	Class B Common Stock F1	--	--	--

Holdings After Transaction: Class B Common Stock — 193,070 contracts (Indirect, By Spouse); Class A Common Stock — 0 shares (Indirect, By Spouse); Class B Common Stock — 5,342,146 contracts (Direct)

Footnotes (3)

1. F1. The Class B Common Stock is convertible at any time at the option of the holder into the Issuer's Class A Common Stock on a one-to-one basis. The Class B Common Stock will convert automatically into shares of the Issuer's Class A Common Stock on a one-to-one basis upon the earlier of (a) any transfer of the Class B Common Stock by the holder, whether or not for value, subject to certain exceptions, (b) the death or incapacity of Mr. Skates, (c) the date that is six months following the date on which Mr. Skates is no longer an employee or director of the Issuer (unless Mr. Skates has rejoined the Issuer during such six-month period) or (d) the date that is six months following the date on which none of the Issuer's founders is an employee or director of the Issuer (unless a founder has rejoined the Issuer during such six-month period).
2. F2. The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person's spouse on June 11, 2026.
3. F3. This transaction was executed in multiple trades at prices ranging from $17.4500 to $17.7800. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Key Figures

Total Class A shares sold: 6,951 shares Class A shares sold: 6,651 shares Weighted average sale price: $17.5258 per share +5 more

8 metrics

Total Class A shares sold 6,951 shares Transactions reported on October 26 and October 28, 2026

Class A shares sold 6,651 shares October 28, 2026

Weighted average sale price $17.5258 per share 6,651 Class A shares sold October 28, 2026

Class A shares sold 100 shares October 26, 2026

Sale price $17.4500 per share 100 Class A shares sold October 26, 2026

Class A shares sold 200 shares October 26, 2026

Sale price $17.4700 per share 200 Class A shares sold October 26, 2026

Underlying Class A shares 5,342,146 shares Direct Class B position reported October 26, 2026; convertible one-for-one

Key Terms

Rule 10b5-1 trading plan, weighted average sale price, one-to-one basis

3 terms

Rule 10b5-1 trading plan financial

"10b5-1 trading plan adopted by the Reporting Person's spouse"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted average sale price financial

"price reported above reflects the weighted average sale price"

one-to-one basis technical

"convertible at any time at the option of the holder into the Issuer's Class A Common Stock on a one-to-one basis"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many AMPL shares did Spenser Skates's spouse sell, and at what prices?

The spouse of CEO and President Spenser Skates sold 6,951 Class A shares on October 26 and October 28, 2026. The October 26 sales were 100 shares at $17.4500 and 200 at $17.4700; 6,651 shares were sold October 28 at a weighted average of $17.5258. The sales were made under a Rule 10b5-1 trading plan adopted June 11, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/28/2026 - 05:45 PM EDT Accepted by SEC EDGAR 10/28/2026 - 05:45 PM EDT Learn about SEC filing dates

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
Estimated average burden
hours per response:			0.5

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

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Skates Spenser

(Last) (First) (Middle)

C/O AMPLITUDE, INC.

201 THIRD STREET, SUITE 200

(Street)

SAN FRANCISCO CALIFORNIA 94103

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Amplitude, Inc. [ AMPL ]

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

X	Director	X	10% Owner
X	Officer (give title below)		Other (specify below)
	CEO and President

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/26/2026

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

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

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

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	10/26/2026		C		300	A	$0(1)	300	I	By Spouse
Class A Common Stock	10/26/2026		S(2)		100	D	$17.45	200	I	By Spouse
Class A Common Stock	10/26/2026		S(2)		200	D	$17.47	0	I	By Spouse
Class A Common Stock	10/28/2026		C		6,651	A	$0(1)	6,651	I	By Spouse
Class A Common Stock	10/28/2026		S(2)		6,651	D	$17.5258(3)	0	I	By Spouse

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	(1)	10/26/2026		C(1)			300	(1)	(1)	Class A Common Stock	300	$0	199,721	I	By Spouse
Class B Common Stock	(1)	10/28/2026		C(1)			6,651	(1)	(1)	Class A Common Stock	6,651	$0	193,070	I	By Spouse
Class B Common Stock	(1)							(1)	(1)	Class A Common Stock	5,342,146		5,342,146	D

Explanation of Responses:

1. The Class B Common Stock is convertible at any time at the option of the holder into the Issuer's Class A Common Stock on a one-to-one basis. The Class B Common Stock will convert automatically into shares of the Issuer's Class A Common Stock on a one-to-one basis upon the earlier of (a) any transfer of the Class B Common Stock by the holder, whether or not for value, subject to certain exceptions, (b) the death or incapacity of Mr. Skates, (c) the date that is six months following the date on which Mr. Skates is no longer an employee or director of the Issuer (unless Mr. Skates has rejoined the Issuer during such six-month period) or (d) the date that is six months following the date on which none of the Issuer's founders is an employee or director of the Issuer (unless a founder has rejoined the Issuer during such six-month period).

2. The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person's spouse on June 11, 2026.

3. This transaction was executed in multiple trades at prices ranging from $17.4500 to $17.7800. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

	/s/ Elizabeth Fisher, as attorney in fact for Spenser Skates	10/28/2026
	** 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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)