Every Form 4 that Amplitude Inc (AMPL) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow AMPL and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full AMPL filings page.
Amplitude, Inc. (AMPL) reported an insider equity-compensation event for Chief Technology Officer and director Curtis Liu. On August 17, 2026, 53,878 shares of Class A common stock were withheld at $13.03 per share to satisfy tax withholding obligations arising from RSUs that vested on August 15, 2026; this withholding does not represent an open-market sale. After this transaction, Liu directly held 950,316 shares of Class A common stock, including 774,628 RSUs.
Amplitude, Inc. (AMPL) disclosed that CEO, President and 10% owner Spenser Skates had 52,369 shares of Class A Common Stock withheld on August 17, 2026. These shares were withheld by the company solely to satisfy tax withholding obligations related to the net issuance of shares from vested restricted stock units and do not represent an open-market sale. Following this withholding, Skates holds 1,231,188 shares directly, including 1,102,599 RSUs.
Amplitude, Inc. (AMPL) reported that Chief Commercial Officer Nathaniel Glenn Crook had 109,368 shares of Class A Common Stock withheld on August 17, 2026 to satisfy tax withholding obligations related to RSU vesting. The company notes this was not an open-market sale. Following this withholding, Crook directly holds 1,922,696 shares of Class A Common Stock, which includes 1,241,362 RSUs.
Amplitude, Inc. (AMPL) reported that its Chief Financial Officer, Andrew Casey, had 72,814 shares of Class A Common Stock withheld on August 17, 2026. The shares were withheld by the company solely to satisfy tax withholding obligations related to the vesting of restricted stock units and are explicitly stated not to represent a sale by the reporting person. After this tax-withholding transaction, Casey directly holds 1,363,338 shares of Class A Common Stock, including 814,949 RSUs.
Amplitude, Inc. director and Chief Technology Officer Curtis Liu, a ten percent owner, reported two bona fide gift transfers of derivative securities on July 8, 2026. The gifts involved an aggregate of 350,000 shares of Class B Common Stock, in two blocks of 175,000 shares. These transfers were non-market gifts, and no value was received for the shares. After the transactions, Liu indirectly holds 7,207,208 shares of Class B Common Stock through a trust and 175,000 shares through his spouse. The Class B Common Stock is convertible into Class A Common Stock on a one-to-one basis and is subject to automatic conversion upon specified events.
Tzuo Tien reported acquisition or exercise transactions in this Form 4 filing.
Amplitude, Inc. director Tzuo Tien received an award of 1,521 shares of Class A Common Stock in the form of restricted stock units granted under the company’s Non-Employee Director Compensation Program in lieu of cash retainer fees. The RSUs carry no purchase price and each unit represents one share, with issuance of the underlying shares deferred under the program’s terms. Following this grant, Tzuo Tien directly holds 101,601 shares of Class A Common Stock, including 50,789 RSUs.
Schultz Erica reported acquisition or exercise transactions in this Form 4 filing.
Amplitude, Inc. director Erica Schultz received an award of 1,659 shares of Class A Common Stock in the form of restricted stock units. The RSUs were granted under the company’s Non-Employee Director Compensation Program in lieu of cash retainer fees and carry no purchase price.
Following this grant, Schultz directly holds 143,100 shares of Class A Common Stock, which the disclosure notes includes 28,194 RSUs. Each RSU represents the right to receive one share of Class A Common Stock, with issuance of the underlying shares deferred under the program’s terms.
Amplitude, Inc. Chief Technology Officer Curtis Liu reported an open-market sale of 22,786 shares of Class A common stock on June 1, 2026 at a weighted average price of $8.0259 per share, executed under a pre-arranged Rule 10b5-1 trading plan adopted on November 26, 2025.
Due to a broker administrative error, 585 fewer shares were actually sold than required by the plan; the broker corrected this through its error account, crediting Liu for 585 shares at the June 1, 2026 sale price and absorbing the cost, with no additional open-market sale.
Following the transaction, Liu directly owns 1,004,194 shares, which include 880,520 restricted stock units.
Amplitude, Inc. director Catherine Wong reported an open-market sale of 7,453 shares of Class A Common Stock on June 12, 2026 at a weighted average price of $6.7865 per share. The shares were sold to satisfy tax obligations related to vesting RSUs under a pre-arranged Rule 10b5-1 trading plan. Following this transaction, she directly owns 111,462 shares, including 24,857 RSUs.
Amplitude, Inc. director James M. Whitehurst received a grant of 24,857 restricted stock units (RSUs) of Class A Common Stock at no cost. Each RSU converts into one share and will vest in full on June 9, 2027, or immediately before the 2027 annual meeting, subject to his continued board service. Following this award, he directly holds 187,201 shares, including 36,214 RSUs.
Wong Catherine reported acquisition or exercise transactions in this Form 4 filing.
Amplitude, Inc. director Catherine Wong received a grant of 24,857 restricted stock units (RSUs) for Class A Common Stock as equity compensation. Each RSU equals one share of Class A stock and was granted at no cash purchase price. The RSUs vest in full on the earlier of June 9, 2027 or immediately before Amplitude’s 2027 annual stockholder meeting, as long as she continues serving on the Board. After this award, Wong’s direct holdings increase to 118,915 shares and RSUs in total, reflecting a routine expansion of her equity stake aligned with the company’s non-employee director compensation program.
Gill Ronald S reported acquisition or exercise transactions in this Form 4 filing.
Amplitude, Inc. director Ronald S. Gill received an equity award of 24,857 restricted stock units of Class A Common Stock on June 9, 2026. This grant was issued at no cash cost under the company’s Non-Employee Director Compensation Program as part of his board compensation.
Each RSU represents one share of Class A Common Stock and will vest in full on the earlier of June 9, 2027 or immediately before the 2027 annual stockholders’ meeting, subject to his continued board service. After this grant, Gill directly holds 99,535 Class A-related interests, including 13,729 shares from a prior pro rata in-kind distribution and 58,657 RSUs.
Schultz Erica reported acquisition or exercise transactions in this Form 4 filing.
Amplitude, Inc. director Erica Schultz reported an equity grant of 24,857 restricted stock units (RSUs) of Class A Common Stock, received at no cash cost. The RSUs were granted under the company’s Non-Employee Director Compensation Program, and vesting has been deferred under that program’s terms. Following this award, she holds 141,441 shares of Class A Common Stock, including 26,535 RSUs, giving her a larger overall equity stake aligned with shareholder interests.
Grady Patrick W reported acquisition or exercise transactions in this Form 4 filing.
Amplitude, Inc. director Patrick W. Grady reported a compensation-related grant of 24,857 restricted stock units (RSUs) for Class A Common Stock. The RSUs were granted at no cash cost and will vest in full on the earlier of June 9, 2027 or immediately before the company’s 2027 annual stockholders’ meeting, subject to his continued board service.
After this award, Grady directly holds 85,806 Class A shares (including the 24,857 RSUs). He also reports indirect ownership through several Sequoia Capital funds, which collectively hold multiple blocks of Amplitude Class A shares, while he disclaims beneficial ownership beyond his pecuniary interest.
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.
Amplitude, Inc. Chief Technology Officer Curtis Liu had 40,279 shares of Class A common stock withheld at $6.06 per share to cover tax obligations from vesting restricted stock units. This was not an open-market sale. After the withholding, he directly holds 1,026,980 shares, including unvested RSUs.
Amplitude, Inc. Chief Commercial Officer Nathaniel Glenn Crook reported a routine tax-related share disposition. On May 15, 2026, 101,292 shares of Class A Common Stock were withheld by the company at $6.06 per share to satisfy tax withholding obligations arising from vesting restricted stock units, and the footnote clarifies this was not an open-market sale. After this withholding, he held 2,032,064 shares directly, including 1,471,366 restricted stock units and 2,330 shares acquired through the employee stock purchase plan on May 14, 2026.
Amplitude, Inc. Chief Financial Officer Andrew Casey had 64,872 shares of Class A Common Stock withheld at $6.06 per share to cover tax obligations from vested restricted stock units on May 15, 2026. This was not an open-market sale. After the withholding, he directly holds 1,436,152 shares, including 958,054 RSUs and 2,500 shares acquired through the employee stock purchase plan.
Amplitude, Inc. CEO and President Spenser Skates reported a tax-related share withholding tied to equity compensation. On May 15, 2026, 39,562 shares of Class A Common Stock were withheld at $6.06 per share to satisfy tax withholding obligations from vested restricted stock units and did not involve any open-market sale.
After this withholding, Skates directly held 1,283,557 shares of Class A Common Stock, which includes 1,212,859 restricted stock units that may settle in shares over time.
Amplitude, Inc. director and Chief Technology Officer Curtis Liu reported an open-market sale of 17,586 shares of Class A common stock at a weighted average price of $8.1245 per share on May 4, 2026. The sale was carried out under a Rule 10b5-1 trading plan adopted on November 26, 2025, indicating it was pre-scheduled. Following this transaction, Liu directly holds 1,067,259 shares of Class A common stock, which includes 986,412 restricted stock units.
Skates Spenser reported acquisition or exercise transactions in this Form 4 filing.
Amplitude, Inc. reported that CEO and President Spenser Skates received an equity award of 1,323,119 shares of Class A Common Stock in the form of restricted stock units. Each RSU represents one share and was granted at no cash cost per share.
The RSUs vest in twelve substantially equal quarterly installments beginning on May 15, 2026, contingent on Skates’ continued service through each vesting date. Following this grant, he is shown as directly holding 1,323,119 shares, aligning his compensation closely with the company’s future stock performance over the multi‑year vesting period.
Liu Curtis reported acquisition or exercise transactions in this Form 4 filing.
Amplitude, Inc. director and Chief Technology Officer Curtis Liu received a grant of 417,827 shares of Class A Common Stock as a stock award, increasing his directly held stake to 1,084,845 shares.
The award is structured as restricted stock units, each representing one share, and will vest in twelve substantially equal quarterly installments beginning on May 15, 2026, subject to his continued service. Footnotes note that his holdings include 986,412 RSUs and correct earlier March 2026 filings that understated his beneficial ownership by 63,262 shares.
Crook Nathaniel Glenn reported acquisition or exercise transactions in this Form 4 filing.
Amplitude, Inc. Chief Commercial Officer Nathaniel Glenn Crook received equity awards of Class A Common Stock on April 15, 2026. The awards cover a total of 1,253,481 shares granted at no cash cost as stock-based compensation. One grant of 278,551 restricted stock units vests in four substantially equal quarterly installments beginning on May 15, 2026, conditioned on continued service. A second grant of 974,930 restricted stock units vests in twelve substantially equal quarterly installments beginning on the same date, also subject to continued service. Following these awards, Crook directly holds 2,131,026 Class A shares, including 726,441 RSUs under the first grant structure and 1,701,371 RSUs under the longer vesting schedule.
Casey Andrew reported acquisition or exercise transactions in this Form 4 filing.
Amplitude, Inc. Chief Financial Officer Casey Andrew received a grant of 431,754 restricted stock units (RSUs), each representing one share of Class A Common Stock. The RSUs vest in twelve substantially equal quarterly installments beginning on May 15, 2026, subject to his continued service.
Following this award, Andrew holds 1,498,524 Class A shares in total, which includes 1,101,159 RSUs. This is a compensation-related equity grant rather than an open-market purchase or sale.
Schultz Erica reported acquisition or exercise transactions in this Form 4 filing.
Amplitude, Inc. director Erica Schultz received a grant of 1,678 restricted stock units (RSUs) of Class A Common Stock as part of the company’s Non-Employee Director Compensation Program, in lieu of cash retainer fees. Each RSU represents one share, with issuance deferred under the program.
Following this grant, Schultz holds 116,584 Class A shares, including 16,584 RSUs. This is a routine, compensation-related equity award rather than an open-market stock purchase or sale.
Tzuo Tien reported acquisition or exercise transactions in this Form 4 filing.
Amplitude, Inc. director Tzuo Tien reported an equity compensation grant of 1,538 shares of Class A Common Stock in the form of restricted stock units. The RSUs were granted under the company’s Non-Employee Director Compensation Program in lieu of cash retainer fees and carry no purchase price.
Each RSU represents one share of Class A Common Stock, with issuance of the underlying shares deferred under the program’s terms. Following this award, Tzuo Tien directly holds 100,080 Class A shares, including 49,268 RSUs.
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.
Amplitude, Inc. director and Chief Technology Officer Curtis Liu sold 30,061 shares of Class A common stock in an open-market transaction at a weighted average price of $8.0017 per share. The sale was effected under a 10b5-1 trading plan adopted by the reporting person. After this transaction, Liu directly holds 636,957 shares, which include 568,585 restricted stock units.
HANSEN THOMAS NEERGAARD reported disposition transactions in a Form 4 filing for AMPL. The filing lists transactions totaling 69,142 shares at a weighted average price of $6.34 per share. Following the reported transactions, holdings were 1,845,845 shares.
Liu Curtis reported disposition transactions in a Form 4 filing for AMPL. The filing lists transactions totaling 26,672 shares at a weighted average price of $6.34 per share. Following the reported transactions, holdings were 730,280 shares.
Casey Andrew reported disposition transactions in a Form 4 filing for AMPL. The filing lists transactions totaling 39,438 shares at a weighted average price of $6.34 per share. Following the reported transactions, holdings were 1,066,770 shares.
Amplitude, Inc. director Tien Tzuo reported an equity grant under the company’s non-employee director compensation program. On January 5, 2026, he was awarded 999 restricted stock units (RSUs) of Class A Common Stock at a price of $0.00 per share, granted in lieu of board retainer fees. Each RSU represents the right to receive one share of Class A Common Stock, and issuance of the shares has been deferred under the program’s terms.
Following this grant, Tzuo beneficially owns 98,542 shares of Class A Common Stock, which includes 47,730 RSUs, all reported as directly owned.
Amplitude, Inc. director Erica Schultz reported an option exercise and share sale. On 12/15/2025, she exercised stock options for 10,000 shares of Class A common stock at an exercise price of $4.19 per share, increasing her direct holdings. That same day, she sold 10,000 shares of Class A common stock at a weighted average price of $10.8758 per share under a Rule 10b5-1 trading plan adopted on March 12, 2025.
After these transactions, Schultz directly holds 114,906 shares of Class A common stock, which includes 14,906 RSUs49,500 stock options with an exercise price of $4.19, which are early exercisable and vest monthly from December 10, 2020 until fully vested on the fourth anniversary of that date.
Amplitude, Inc. (AMPL) director Erica Schultz reported an option exercise and share sale involving Class A common stock. On 11/17/2025, she exercised a stock option for 10,000 shares at an exercise price of $4.19 per share and acquired these shares. That same day, she sold 10,000 shares at a weighted average price of $10.2295, with individual trade prices ranging from $9.5000 to $10.5800, under a Rule 10b5-1 trading plan adopted on March 12, 2025.
After these transactions, Schultz directly beneficially owned 107,406 shares of Class A common stock and held 59,500 stock options. The reported option is early exercisable, with 1/48th of the option shares vesting monthly from December 10, 2020 so that all shares vest over four years.
Amplitude, Inc. (AMPL) director, 10% owner, and Chief Technology Officer Liu Curtis reported an automatic share withholding tied to equity compensation. On 11/15/2025, 36,092 shares of Class A common stock were withheld at $10.73 per share to satisfy tax obligations arising from the vesting of restricted stock units. This transaction is classified as code F, meaning it reflects tax withholding rather than an open-market sale. After this event, Liu Curtis beneficially owned 756,952 shares of Class A common stock, including 639,658 RSUs, maintaining a substantial ownership position in the company.
Amplitude, Inc. (AMPL) reported an insider equity transaction by its Chief Financial Officer, Andrew Casey. On November 15, 2025, the company withheld 54,400 shares of Class A Common Stock at $10.73 per share to cover tax withholding obligations tied to the vesting of restricted stock units (RSUs). This withholding is described as not representing a market sale by the executive. Following the transaction, Casey beneficially owned 1,106,208 shares of Class A Common Stock, which the filing states includes 1,140,440 RSUs.
Amplitude, Inc. (AMPL) reported an insider equity transaction involving its President, Thomas Neergaard Hansen. On November 15, 2025, the company withheld 91,618 shares of Class A common stock to cover tax obligations arising from the vesting of restricted stock units (RSUs). This withholding is explicitly described as not being a sale by the reporting person, but a share reduction to satisfy tax withholding. After this transaction, Hansen beneficially owned 1,914,987 shares of Class A common stock, which includes 1,140,440 RSUs.
Amplitude, Inc. (AMPL): Form 4 insider transaction
Chief Executive Officer and Director Spenser Skates, a 10% owner, reported transactions on 11/11/2025. A 400,000-share conversion of Class B Common Stock into Class A Common Stock occurred on a one-to-one basis at $0.00. On the same day, 400,000 shares of Class A Common Stock were sold at a weighted average price of $10.9883, executed in multiple trades between $10.5500 and $11.2700. The transactions were reported as indirect, “By Spouse.”
The sales were effected under a Rule 10b5‑1 trading plan adopted on August 8, 2025. The filing notes Class B shares are convertible into Class A on a one-to-one basis under the terms described.
Amplitude, Inc. (AMPL) director Erica Schultz filed a Form 4 reporting an option exercise and related sale on 10/15/2025. She exercised 10,000 Class A shares via a stock option at $4.19 per share (code M), then sold 10,000 Class A shares (code S) at a weighted average price of $10.1229, with trades ranging from $10.0200 to $10.2900. The sale was made under a Rule 10b5-1 trading plan adopted on March 12, 2025.
After these transactions, she beneficially owns 107,406 Class A shares directly and holds 69,500 derivative securities (stock options) directly. The reported option is early exercisable and follows a monthly vesting schedule that began on December 10, 2020.
Amplitude, Inc. (AMPL) director Tien Tzuo received equity compensation under the company's director program. The Form 4 shows an acquisition on 10/05/2025 of 977 shares of Class A common stock reported at $0.00, reflecting restricted stock units granted in lieu of retainer fees. The filing states issuance of the RSU shares has been deferred under the program. After the transaction, the reporting person beneficially owned 97,543 shares, which includes 46,731 additional RSUs. The form was signed by an attorney in fact on 10/07/2025.
Erica Schultz, a director of Amplitude, Inc. (AMPL), reported transactions on 09/15/2025: She exercised an early-exercisable option to purchase 10,000 shares at a $4.19 exercise price and immediately sold 10,000 shares pursuant to a pre-established 10b5-1 trading plan. The sale generated a weighted average sale price of $11.0633 per share, with execution prices ranging from $10.85 to $11.31. Following these transactions, Schultz beneficially owned 79,500 shares subject to outstanding options and 107,406 shares of Class A common stock.
The option vests monthly beginning 12/10/2020 and fully vested on the fourth anniversary; the sale was executed under the 10b5-1 plan adopted 03/12/2025.