Was Curtis Liu’s Amplitude (AMPL) share sale under a 10b5-1 plan?

Yes. The filing states the sales were effected under a Rule 10b5-1 trading plan adopted on November 26, 2025 . Such plans pre-schedule trades, indicating this sale was arranged in advance rather than timed opportunistically.

CTO Curtis Liu sells 22K Amplitude (NASDAQ: AMPL) shares via 10b5-1 plan

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

Amplitude reported that CTO and 10% owner Curtis Liu sold 22,201 shares of Class A Common Stock. The open-market sale occurred at a weighted average price of $8.0259 per share and was executed on June 1, 2026 .

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

Curtis Liu sold 22,201 Amplitude shares at a weighted average price of $8.0259 per share. The trades were executed in a price range from $8.0000 to $8.0600 , according to the disclosed transaction details and related footnote.

Q: How many Amplitude (AMPL) shares does Curtis Liu own after the sale?

After the reported transaction, Curtis Liu directly holds 1,004,779 shares of Amplitude Class A Common Stock. This total includes 880,520 restricted stock units , reflecting a substantial ongoing equity stake in the company following the sale.

Q: What type of security did Curtis Liu sell in the Amplitude (AMPL) Form 4?

The Form 4 shows that Curtis Liu sold Class A Common Stock of Amplitude. The transaction involved 22,201 non-derivative shares in an open-market sale, with execution prices ranging from $8.0000 to $8.0600 per share on the transaction date.

Q: How significant is Curtis Liu’s Amplitude (AMPL) stock sale relative to his holdings?

Liu sold 22,201 shares while retaining 1,004,779 shares after the transaction. This indicates he disposed of only a small fraction of his total direct holdings, and he continues to hold a large equity position in Amplitude.

Filing Impact

(Moderate)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Amplitude, Inc. Chief Technology Officer Curtis Liu, who is also a 10% owner, sold 22,201 shares of Class A Common Stock in an open-market transaction at a weighted average price of $8.0259 per share on June 1, 2026. The sale was executed under a pre-arranged Rule 10b5-1 trading plan adopted on November 26, 2025, indicating it was scheduled in advance. Following this transaction, Liu directly holds 1,004,779 shares, which include 880,520 restricted stock units, so the sale represents a small portion of his overall position.

Insider Trade Summary 10b5-1

Net Seller: 22,201 shares ($178,183)

Net Sell 1 txn

Insider Liu Curtis

Role Chief Technology Officer

Sold 22,201 shs ($178K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	22,201	$8.0259	$178K

Holdings After Transaction: Class A Common Stock — 1,004,779 shares (Direct, null)

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 $8.0000 to $8.0600. 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 880,520 restricted stock units.

Key Figures

Shares sold: 22,201 shares Sale price (weighted average): $8.0259 per share Post-transaction holdings: 1,004,779 shares +3 more

6 metrics

Shares sold 22,201 shares Class A Common Stock sold on June 1, 2026

Sale price (weighted average) $8.0259 per share Open-market sale of Class A Common Stock

Post-transaction holdings 1,004,779 shares Directly held after June 1, 2026 sale

Restricted stock units included 880,520 RSUs Part of post-transaction direct holdings

Trade price range $8.0000–$8.0600 Multiple trades executed within this range

10b5-1 plan adoption date November 26, 2025 Plan governing the June 1, 2026 sale

Key Terms

Rule 10b5-1 trading plan, weighted average sale price, restricted stock units, open-market sale

4 terms

Rule 10b5-1 trading plan financial

"The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person on November 26, 2025."

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

"The price reported in Column 4 above reflects the weighted average sale price."

restricted stock units financial

"Includes 880,520 restricted stock units."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

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Form 4 Insider Transactions: What Each Field Means →

06/03/2026 - 05:17 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

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)
	Chief Technology Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/01/2026

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)
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	06/01/2026		S		22,201⁽¹⁾	D	$8.0259⁽²⁾	1,004,779⁽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 $8.0000 to $8.0600. 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 880,520 restricted stock units.

Remarks:

	/s/ Elizabeth Fisher, as attorney in fact for Curtis Liu	06/03/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

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

Amplitude reported that CTO and 10% owner Curtis Liu sold 22,201 shares of Class A Common Stock. The open-market sale occurred at a weighted average price of $8.0259 per share and was executed on June 1, 2026.

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

Curtis Liu sold 22,201 Amplitude shares at a weighted average price of $8.0259 per share. The trades were executed in a price range from $8.0000 to $8.0600, according to the disclosed transaction details and related footnote.

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

After the reported transaction, Curtis Liu directly holds 1,004,779 shares of Amplitude Class A Common Stock. This total includes 880,520 restricted stock units, reflecting a substantial ongoing equity stake in the company following the sale.

What type of security did Curtis Liu sell in the Amplitude (AMPL) Form 4?

The Form 4 shows that Curtis Liu sold Class A Common Stock of Amplitude. The transaction involved 22,201 non-derivative shares in an open-market sale, with execution prices ranging from $8.0000 to $8.0600 per share on the transaction date.

How significant is Curtis Liu’s Amplitude (AMPL) stock sale relative to his holdings?

Liu sold 22,201 shares while retaining 1,004,779 shares after the transaction. This indicates he disposed of only a small fraction of his total direct holdings, and he continues to hold a large equity position in Amplitude.