Curtis Liu reports 10b5-1 stock sales

Curtis Liu reported sales of Common Stock under a Rule 10b5-1 plan.

Rhea-AI Filing Summary

Curtis Liu reported sales of Common Stock under a Rule 10b5-1 plan. The filing lists three 10b5-1 dispositions: 17,586 shares on 05/04/2026 for $142,877.46, 33,201 shares on 03/06/2026 for $265,838.82, and 30,061 shares on 03/05/2026 for $240,538.91. The record also references Restricted Stock Units with an award date of 05/15/2026.

Insights

Insider Transactions Analyst

Sales executed under a pre-arranged 10b5-1 plan; routine liquidity transactions.

The excerpt lists three reported 10b5-1 sales by Curtis Liu with exact share counts and gross proceeds for each trade date. These entries are presented as dispositions under scheduled plan mechanics rather than discretionary open-market commentary.

Timing and plan terms are not detailed in the excerpt; subsequent filings or footnotes could clarify whether proceeds were retained, used for taxes, or part of an exercise-and-sell sequence. Monitoring later filings may show remaining holdings or plan termination details.

Key Figures

Sale on 05/04/2026: 17,586 shares Sale on 03/06/2026: 33,201 shares Sale on 03/05/2026: 30,061 shares +1 more

4 metrics

Sale on 05/04/2026 17,586 shares gross proceeds $142,877.46

Sale on 03/06/2026 33,201 shares gross proceeds $265,838.82

Sale on 03/05/2026 30,061 shares gross proceeds $240,538.91

RSU award date 05/15/2026 Restricted Stock Units referenced in filing

Key Terms

10b5-1, Restricted Stock Units, Form 144/A

3 terms

10b5-1 regulatory

"10b5-1 Sales for CURTIS LIU 201 Third Street, Suite 200 San Francisco"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Restricted Stock Units financial

"Restricted Stock Units | Issuer | 05/15/2026"

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.

Form 144/A regulatory

"144/A: Filer Information"

FAQ

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

What trades did Curtis Liu report in the 144/A for AMPL?

Curtis Liu reported three 10b5-1 sales: 17,586 shares on 05/04/2026 for $142,877.46, 33,201 shares on 03/06/2026 for $265,838.82, and 30,061 shares on 03/05/2026 for $240,538.91, as listed in the filing.

Were the Curtis Liu sales made under a 10b5-1 plan?

Yes. The filing explicitly labels the transactions as 10b5-1 Sales, indicating they were executed under a pre-arranged trading plan rather than described as ad-hoc open-market trades.

Does the filing show Restricted Stock Units for AMPL?

The excerpt references Restricted Stock Units with an award or effective date of 05/15/2026. The filing lists RSUs as a security type but does not disclose vesting or quantities in the provided text.

How much gross proceeds were reported from the March 2026 sales?

The March trades show combined gross proceeds of $506,377.73, from 33,201 shares on 03/06/2026 for $265,838.82 and 30,061 shares on 03/05/2026 for $240,538.91, as disclosed in the excerpt.

Does the filing disclose who received the sale proceeds?

The excerpt does not state the recipient of proceeds beyond identifying the seller as Curtis Liu; the filing format indicates these are 10b5-1 dispositions but does not specify cash-flow allocation or withholding treatment.

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

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Accepted by SEC EDGAR 06/12/2026 - 04:29 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144/A

144/A: Filer Information

Filer CIK	0001883022
Filer CCC	XXXXXXXX
Previous Accession Number Of The Filing	0001950047-26-005369
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144/A: Issuer Information

Name of Issuer	Amplitude, Inc.
SEC File Number	001-40817
Address of Issuer	201 THIRD STREET, SUITE 200 SAN FRANCISCO CALIFORNIA 94103
Phone	(415) 231-2353
Name of Person for Whose Account the Securities are To Be Sold	Liu Curtis
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer
Relationship to Issuer	Director
Relationship to Issuer	10% Stockholder

144/A: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	22786	178186.52	103867086	06/01/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144/A: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	05/15/2026	Restricted Stock Units	Issuer			22786	05/15/2026	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144/A: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for CURTIS LIU 201 Third Street, Suite 200 San Francisco CA 94103	Common	05/04/2026	17586	142877.46
10b5-1 Sales for CURTIS LIU 201 Third Street, Suite 200, San Francisco CA 94103	Common	03/06/2026	33201	265838.82
10b5-1 Sales for CURTIS LIU 01 Third Street, Suite 200, San Francisco CA 94103	Common	03/05/2026	30061	240538.91

144/A: Remarks and Signature

Remarks	The 144 form is amended to update the share amount to 22,786.
Date of Notice	06/12/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	11/26/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Curtis Liu
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)