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Amplitude CEO's spouse sells 901 shares on Nov. 4

The spouse's Class A sales were made under a Rule 10b5-1 trading plan adopted June 11, 2026.

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Form Type
4

Rhea-AI Filing Summary

Amplitude, Inc. CEO and President Spenser Skates reported indirect transactions by his spouse: 901 Class B shares converted into 901 Class A shares on November 4, 2026, followed by a sale of 901 Class A shares at a weighted average $17.4629 per share. On November 5, 2026, his spouse converted 61 Class B shares into Class A and sold 29 shares at a weighted average $17.5190 and 32 shares at $18.6700 per share. The sales were made under a Rule 10b5-1 trading plan adopted by the spouse on June 11, 2026.

Separately, Spenser Skates held 5,342,146 Class B shares directly as of November 4, 2026; Class B shares are convertible at the holder’s option into Class A on a one-to-one basis.

Insider Skates Spenser
Role CEO and President
Sold 962 shs ($17K)
Approx. gross sale proceeds $17K
Share of Position Sold 100%
Type Security Shares Price Value
Conversion Class B Common Stock F1 61 $0.00 $0.00
Conversion Class A Common Stock F1 61 $0.00 $0.00
Sale Class A Common Stock F2, F4 29 $17.519 $508.05
Sale Class A Common Stock F2 32 $18.67 $597.44
Conversion Class B Common Stock F1 901 $0.00 $0.00
Conversion Class A Common Stock F1 901 $0.00 $0.00
Sale Class A Common Stock F2, F3 901 $17.4629 $16K
Holding Class B Common Stock F1 -- -- --
Holdings After Transaction: Class B Common Stock — 192,108 contracts (Indirect, By Spouse); Class A Common Stock — 0 shares (Indirect, By Spouse); Class B Common Stock — 5,342,146 contracts (Direct)
Holdings Before and After: Class B Common Stock, 193,070 to 192,108 contracts (Indirect, By Spouse); Class A Common Stock, 0 to 0 shares (Indirect, By Spouse)
Footnotes (4)
  1. F1. The Class B Common Stock is convertible at any time at the option of the holder into the Issuer's Class A Common Stock on a one-to-one basis. The Class B Common Stock will convert automatically into shares of the Issuer's Class A Common Stock on a one-to-one basis upon the earlier of (a) any transfer of the Class B Common Stock by the holder, whether or not for value, subject to certain exceptions, (b) the death or incapacity of Mr. Skates, (c) the date that is six months following the date on which Mr. Skates is no longer an employee or director of the Issuer (unless Mr. Skates has rejoined the Issuer during such six-month period) or (d) the date that is six months following the date on which none of the Issuer's founders is an employee or director of the Issuer (unless a founder has rejoined the Issuer during such six-month period).
  2. F2. The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person's spouse on June 11, 2026.
  3. F3. This transaction was executed in multiple trades at prices ranging from $17.4500 to $17.5300. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
  4. F4. This transaction was executed in multiple trades at prices ranging from $17.4500 to $17.9000. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
Class B-to-Class A conversions 901 Class B shares into 901 Class A shares Indirect conversion by the spouse on November 4, 2026
Class A shares sold 901 shares Indirect sale by the spouse on November 4, 2026
Weighted average sale price $17.4629 per share 901 Class A shares sold on November 4, 2026
Class B-to-Class A conversion 61 Class B shares into 61 Class A shares Indirect conversion by the spouse on November 5, 2026
November 5 Class A sales 29 shares at a weighted average $17.5190 per share; 32 shares at $18.6700 per share Indirect sales by the spouse
Direct Class B shares held 5,342,146 shares Spenser Skates, as of November 4, 2026
Rule 10b5-1 trading plan regulatory
"sales reported were effected pursuant to a 10b5-1 trading plan"
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
"price reported above reflects the weighted average sale price"
Class B Common Stock technical
"convertible at any time at the option of the holder"
A class B common stock is one of multiple types of a company’s ordinary shares that carries specific rights—often different voting power or dividend priority—compared with other classes. For investors it matters because those differences affect how much influence you have over company decisions, the income you might receive, and how freely the shares trade; think of it like owning a car with different keys: some keys let you start the engine and open the trunk, others only unlock the door.
one-to-one basis technical
"Class A Common Stock on a one-to-one basis"

FAQ

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

How many AMPL shares did Spenser Skates's spouse sell, and at what prices?

The reported sales were 901 Class A shares on November 4, 2026, at a weighted average $17.4629 per share, and 29 shares at a weighted average $17.5190 plus 32 shares at $18.6700 on November 5, 2026. The sales were made under a Rule 10b5-1 trading plan adopted by the spouse on June 11, 2026.

How does AMPL Class B stock convert to Class A?

Class B Common Stock is convertible at any time at the holder’s option into Class A Common Stock on a one-to-one basis. It also converts automatically upon certain transfers, subject to exceptions, or upon Spenser Skates’s death or incapacity. Automatic conversion can also occur six months after specified employment or director-status conditions involving Mr. Skates or the founders.

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

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SEC Form 4
FORM 4UNITED 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*
Skates Spenser

(Last)(First)(Middle)
C/O AMPLITUDE, INC.
201 THIRD STREET, 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)
XDirectorX10% Owner
XOfficer (give title below)Other (specify below)
CEO and President
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
11/04/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Class A Common Stock11/04/2026C901A$0(1)901IBy Spouse
Class A Common Stock11/04/2026S(2)901D$17.4629(3)0IBy Spouse
Class A Common Stock11/05/2026C61A$0(1)61IBy Spouse
Class A Common Stock11/05/2026S(2)29D$17.519(4)32IBy Spouse
Class A Common Stock11/05/2026S(2)32D$18.670IBy Spouse
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Class B Common Stock(1)11/04/2026C(1)901 (1) (1)Class A Common Stock901$0192,169IBy Spouse
Class B Common Stock(1)11/05/2026C(1)61 (1) (1)Class A Common Stock61$0192,108IBy Spouse
Class B Common Stock(1) (1) (1)Class A Common Stock5,342,1465,342,146D
Explanation of Responses:
1. The Class B Common Stock is convertible at any time at the option of the holder into the Issuer's Class A Common Stock on a one-to-one basis. The Class B Common Stock will convert automatically into shares of the Issuer's Class A Common Stock on a one-to-one basis upon the earlier of (a) any transfer of the Class B Common Stock by the holder, whether or not for value, subject to certain exceptions, (b) the death or incapacity of Mr. Skates, (c) the date that is six months following the date on which Mr. Skates is no longer an employee or director of the Issuer (unless Mr. Skates has rejoined the Issuer during such six-month period) or (d) the date that is six months following the date on which none of the Issuer's founders is an employee or director of the Issuer (unless a founder has rejoined the Issuer during such six-month period).
2. The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person's spouse on June 11, 2026.
3. This transaction was executed in multiple trades at prices ranging from $17.4500 to $17.5300. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
4. This transaction was executed in multiple trades at prices ranging from $17.4500 to $17.9000. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
/s/ Elizabeth Fisher, as attorney in fact for Spenser Skates11/06/2026
** Signature of Reporting PersonDate
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)

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