How significant is Curtis Liu’s AMPL share sale compared with his remaining stake?

Liu sold 33,201 shares but still holds 603,756 shares afterward, including a large block of restricted stock units. That means the reported sale represents only a small portion of his disclosed equity position in Amplitude, suggesting a routine liquidity event.

Amplitude (NASDAQ: AMPL) CTO Liu sells 33,201 shares under 10b5-1 plan

Filing Impact

(Moderate)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Amplitude, Inc. director and Chief Technology Officer Curtis Liu reported an open-market sale of 33,201 shares of Class A Common Stock at a weighted average price of $8.007 per share on March 6, 2026. The transaction was executed under a pre-arranged Rule 10b5-1 trading plan adopted on November 26, 2025, indicating it was scheduled in advance rather than timed discretionarily. After this sale, Liu directly held 603,756 shares, which the disclosure notes includes 568,585 restricted stock units. This filing shows a planned sale representing only a portion of his overall equity position while he continues to retain a substantial stake in the company.

Insights

Planned sale of a small portion of CTO's holdings under 10b5-1.

Curtis Liu, Chief Technology Officer and director of Amplitude, Inc., sold 33,201 Class A shares at a weighted average of $8.007 on March 6, 2026. The filing shows this as an open-market sale of common stock.

A key detail is that the trade occurred under a Rule 10b5-1 plan adopted on November 26, 2025. Such plans allow insiders to pre-schedule trades, reducing concerns that timing reflects nonpublic information or a sudden change in sentiment.

Post-transaction, Liu holds 603,756 shares, including 568,585 restricted stock units. Given that the sale represents only a small fraction of his reported stake and that no options or other derivatives remain visible in this filing, the activity appears routine and primarily administrative rather than thesis-changing for investors.

Insider Trade Summary 10b5-1

Net Seller: 33,201 shares ($265,840)

Net Sell 1 txn

Insider Liu Curtis

Role Chief Technology Officer

Sold 33,201 shs ($266K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	33,201	$8.007	$266K

Holdings After Transaction: Class A Common Stock — 603,756 shares (Direct)

Footnotes (1)

The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the reporting person on November 26, 2025. This transaction was executed in multiple trades at prices ranging from $8.00 to $8.04. 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. Includes 568,585 restricted stock units.

Form 4 Insider Transactions: What Each Field Means →

03/10/2026 - 04:54 PM

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).

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

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)
03/06/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A Common Stock	03/06/2026		S		33,201⁽¹⁾	D	$8.007⁽²⁾	603,756⁽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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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 at prices ranging from $8.00 to $8.04. 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	03/10/2026
	** 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.

Source: View Original Filing on SEC EDGAR

FAQ

What did Amplitude (AMPL) CTO Curtis Liu report in this Form 4?

Curtis Liu reported selling 33,201 shares of Amplitude Class A Common Stock in an open-market transaction. The weighted average sale price was about $8.007 per share, and the trade occurred on March 6, 2026, according to the Form 4 disclosure.

Was the AMPL insider stock sale by Curtis Liu part of a 10b5-1 plan?

Yes. The filing states the sales were made under a Rule 10b5-1 trading plan adopted on November 26, 2025. Such pre-arranged plans schedule trades in advance, helping demonstrate the transactions were not timed based on nonpublic company information.

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

After the sale, Curtis Liu directly holds 603,756 Amplitude shares. The filing clarifies that this figure includes 568,585 restricted stock units, which generally convert into shares over time as vesting or other conditions are satisfied under the company’s equity plans.

What price did Amplitude CTO Curtis Liu receive for his AMPL shares?

The reported weighted average sale price was $8.007 per share, with individual trades executed between $8.00 and $8.04. The Form 4 notes he can provide detailed trade breakdowns upon request to regulators, the company, or shareholders.

Does this Amplitude (AMPL) Form 4 indicate derivative exercises or only stock sales?

This Form 4 reflects only a sale of non-derivative Class A Common Stock. The transactionSummary shows no option exercises, conversions, or other derivative transactions, and the derivativeSummary section is empty in this particular disclosure.