Amplitude CTO Liu sells 30,061 shares in plan trade

Amplitude, Inc. director and Chief Technology Officer Curtis Liu sold 30,061 shares of Class A common stock in an open-market transaction at a weighted average price of $8.0017 per share.

Rhea-AI Filing Summary

Amplitude, Inc. director and Chief Technology Officer Curtis Liu sold 30,061 shares of Class A common stock in an open-market transaction at a weighted average price of $8.0017 per share. The sale was effected under a 10b5-1 trading plan adopted by the reporting person. After this transaction, Liu directly holds 636,957 shares, which include 568,585 restricted stock units.

Insider Trade Summary

Net Seller: 30,061 shares

Net Sell 1 txn

Insider Liu Curtis

Role Chief Technology Officer

Sold 30,061 shs ($241K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	30,061	$8.0017	$241K

Holdings After Transaction: Class A Common Stock — 636,957 shares (Direct)

Footnotes (3)

1. F1. The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the reporting person on November 26, 2025.
2. F2. This transaction was executed in multiple trades in prices ranging from $8.00 to $8.02, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.
3. F3. Includes 568,585 restricted stock units.

FAQ

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

Amplitude reported that Curtis Liu sold 30,061 shares of Class A common stock. The transaction was an open-market sale at a weighted average price of $8.0017 per share, documented in a Form 4 insider trading report.

At what price did Curtis Liu sell Amplitude (AMPL) shares?

Curtis Liu sold Amplitude shares at a weighted average price of $8.0017 per share. Individual trades occurred in a price range from $8.00 to $8.02, according to the detailed transaction disclosure in the Form 4 filing.

How many Amplitude (AMPL) shares does Curtis Liu hold after this sale?

After the reported sale, Curtis Liu directly holds 636,957 Amplitude shares. This total includes 568,585 restricted stock units, as specified in the Form 4 footnotes describing his remaining beneficial ownership position.

Was the Amplitude (AMPL) insider sale under a 10b5-1 plan?

Yes. The Form 4 states the sales were effected under a 10b5-1 trading plan adopted by Curtis Liu. Such plans allow pre-arranged trading instructions, helping insiders systematically sell shares over time under predetermined conditions.

What role does Curtis Liu hold at Amplitude (AMPL)?

Curtis Liu is identified as a director and officer of Amplitude, serving as Chief Technology Officer. The Form 4 also classifies him as a ten percent owner, highlighting his significant equity stake in the company.

What type of security did Curtis Liu sell in Amplitude (AMPL)?

The transaction involved Amplitude Class A common stock. The Form 4 characterizes it as a non-derivative transaction, meaning it related directly to common shares rather than options, warrants, or other derivative securities.

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Accepted by SEC EDGAR 03/09/2026 - 04:44 PM 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^*

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)
03/05/2026

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	03/05/2026		S		30,061(1)	D	$8.0017(2)	636,957(3)	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. The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the reporting person on November 26, 2025.

2. This transaction was executed in multiple trades in prices ranging from $8.00 to $8.02, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

3. Includes 568,585 restricted stock units.

Remarks:

	/s/ Elizabeth Fisher, as attorney in fact for Liu Curtis	03/09/2026
	** 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.