AMPL Rule 144 notice: RSUs sale dated 05/15/2026

AMPL notice under Rule 144: proposed sale of Common shares related to Restricted Stock Units with a listed sale date of 05/15/2026.

Rhea-AI Filing Summary

AMPL notice under Rule 144: proposed sale of Common shares related to Restricted Stock Units with a listed sale date of 05/15/2026. The filing also lists recent 10b5-1 sales by Curtis Liu on 03/05/2026 (30,061 shares, $240,538.91), 03/06/2026 (33,201 shares, $265,838.82), and 05/04/2026 (17,586 shares, $142,877.46).

Key Figures

Sale date listed: 05/15/2026 10b5-1 sale (03/05/2026): 30,061 shares Proceeds (03/05/2026): $240,538.91 +4 more

7 metrics

Sale date listed 05/15/2026 Restricted Stock Units sale date

10b5-1 sale (03/05/2026) 30,061 shares sale by Curtis Liu on 03/05/2026

Proceeds (03/05/2026) $240,538.91 proceeds reported for 30,061-share sale on 03/05/2026

10b5-1 sale (03/06/2026) 33,201 shares sale by Curtis Liu on 03/06/2026

Proceeds (03/06/2026) $265,838.82 proceeds reported for 33,201-share sale on 03/06/2026

10b5-1 sale (05/04/2026) 17,586 shares sale by Curtis Liu on 05/04/2026

Proceeds (05/04/2026) $142,877.46 proceeds reported for 17,586-share sale on 05/04/2026

Key Terms

10b5-1, Restricted Stock Units, Rule 144

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

"Securities To Be Sold | Common | 05/15/2026 | 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.

Rule 144 regulatory

"form_type: "144" listed in metadata and header"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

FAQ

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

What does the AMPL Rule 144 filing disclose?

It lists a proposed Rule 144 sale of Common shares tied to Restricted Stock Units dated 05/15/2026. The filing also documents three recent 10b5-1 sales by Curtis Liu on 03/05/2026, 03/06/2026, and 05/04/2026 including share counts and proceeds.

How many shares did Curtis Liu sell under 10b5-1 plans in the excerpt?

The excerpt shows three 10b5-1 sales totaling 80,848 shares. Individual sales: 30,061 shares on 03/05/2026, 33,201 shares on 03/06/2026, and 17,586 shares on 05/04/2026, with proceeds listed for each sale.

What proceeds are reported for the recent 10b5-1 sales in the filing?

Proceeds are listed as $240,538.91, $265,838.82, and $142,877.46. These correspond to sales on 03/05/2026, 03/06/2026, and 05/04/2026 respectively and are shown adjacent to each share count in the excerpt.

Does the filing state who is offering the shares or who receives proceeds?

The excerpt identifies the security type and dates but does not assign proceeds recipients in explicit prose. The filing shows broker/filer information (Morgan Stanley Smith Barney LLC) and lists the transactions and dates without separately stating cash‑flow recipients.

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

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Accepted by SEC EDGAR 06/01/2026 - 04:18 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

144: Filer Information

Filer CIK	0001883022
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: 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	4152312353
Name of Person for Whose Account the Securities are To Be Sold	CURTIS LIU
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	Director
Relationship to Issuer	Officer
Relationship to Issuer	10% Stockholder

144: 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	22201	173611.82	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: 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			22201	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: 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 201 Third Street, Suite 200 San Francisco CA 94103	Common	03/05/2026	30061	240538.91

144: Remarks and Signature

Remarks
Date of Notice	06/01/2026
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)