[Form 4] Amplitude, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Amplitude, Inc. (AMPL) director, 10% owner, and Chief Technology Officer Liu Curtis reported an automatic share withholding tied to equity compensation. On 11/15/2025, 36,092 shares of Class A common stock were withheld at $10.73 per share to satisfy tax obligations arising from the vesting of restricted stock units. This transaction is classified as code F, meaning it reflects tax withholding rather than an open-market sale. After this event, Liu Curtis beneficially owned 756,952 shares of Class A common stock, including 639,658 RSUs, maintaining a substantial ownership position in the company.

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).

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^*

Liu Curtis

(Last) (First) (Middle)

C/O AMPLITUDE, INC.

201 THIRD ST., SUITE 200

(Street)

SAN FRANCISCO CA 94103

(City) (State) (Zip)

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)
	Chief Technology Officer

3. Date of Earliest Transaction (Month/Day/Year)
11/15/2025

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	11/15/2025		F(1)		36,092	D	$10.73	756,952(2)	D

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

Explanation of Responses:

1. Represents shares of the Issuer's Class A Common Stock withheld by the Issuer solely to satisfy tax withholding obligations in connection with the net issuance of shares of the Issuer's Class A Common Stock delivered to the reporting person on November 15, 2025, from the vesting of restricted stock units ("RSUs"), and does not represent a sale by the reporting person.

2. Includes 639,658 RSUs.

Remarks:

	/s/ Elizabeth Fisher, as attorney in fact for Liu Curtis	11/18/2025
	** 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.
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.

FAQ

What insider transaction did Amplitude (AMPL) report for Liu Curtis?

Amplitude reported that Liu Curtis had 36,092 shares of Class A common stock withheld on 11/15/2025 to cover tax obligations related to vesting restricted stock units, coded as an F transaction.

Does the Form 4 for Amplitude (AMPL) show an open-market sale by Liu Curtis?

No. The filing states that the 36,092 shares were withheld by the issuer solely to satisfy tax withholding obligations from RSU vesting and do not represent a sale by Liu Curtis.

How many Amplitude (AMPL) shares does Liu Curtis own after the reported transaction?

Following the tax withholding transaction, Liu Curtis beneficially owned 756,952 shares of Amplitude Class A common stock, which includes 639,658 RSUs.

What is Liu Curtis’s role and relationship to Amplitude (AMPL)?

Liu Curtis is reported as a Director, a 10% Owner, and an Officer of Amplitude, serving as Chief Technology Officer.

What does transaction code F mean in the Amplitude (AMPL) Form 4?

Transaction code F indicates that shares were withheld by the issuer to pay taxes due on the vesting or exercise of equity awards, rather than being sold on the open market.

What was the reported price per share for the Amplitude (AMPL) tax withholding transaction?

The Form 4 shows a price of $10.73 per share for the 36,092 shares of Class A common stock withheld to satisfy tax obligations.