Impinj, Inc. Form 4 Filings

Impinj Inc. CFO Baker Cary reported that 479 RSUs from a March 23, 2023 grant and 596 RSUs from a March 23, 2024 grant vested on September 23, 2026; one-sixteenth of each grant vested. Cary acquired the corresponding common shares and remitted 424 shares to the issuer for tax withholding, reported at $177.20 per share. No Rule 10b5-1 plan is reported.

IMPINJ INC (PI) reported that its chief financial officer, Cary Baker, sold 8,892 shares of common stock on September 21, 2026 at a price of $185.00 per share in an open-market transaction. After this sale, he held 80,388 shares of the company’s common stock directly.

The sale was carried out pursuant to a Rule 10b5-1 trading plan that became effective on December 10, 2025, indicating it was pre-arranged under that plan rather than opportunistic.

IMPINJ INC (PI) director Miron Washington reported a sale of 800 shares of Common Stock on September 15, 2026 in an open market or private transaction at $173.26 per share. Following this transaction, he directly holds 4,354 shares of IMPINJ Common Stock. No Rule 10b5-1 trading plan is reported for this sale.

IMPINJ INC (PI) reported that Chief Executive Officer and director Chris Diorio made a bona fide gift of 10,000 shares of common stock on September 14, 2026. The gift was effected pursuant to a Rule 10b5-1 trading plan adopted on February 23, 2026. After this disposition, Diorio held 354,421 shares directly and an additional 199,362 shares indirectly through DFT L.L.C.

IMPINJ INC (PI) reported that its Chief Financial Officer, Cary Baker, had 1,739 Restricted Stock Units convert into an equal number of shares of common stock on August 20, 2026, as part of a prior RSU grant. In connection with this vesting, 685 shares of common stock were remitted to Impinj in an exempt disposition under Rule 16b-3(e) to satisfy tax withholding obligations at a price of $159.73 per share. Following the transaction, Baker held 5,219 RSUs representing additional contingent rights to receive Impinj common stock from the same grant, which originally totaled 6,958 RSUs.

IMPINJ INC (PI) reported that Chief Executive Officer and director Chris Diorio, Ph.D., had 3,753 Restricted Stock Units convert into the same number of shares of common stock on August 20, 2026. In connection with this vesting, 1,477 shares were remitted to Impinj to satisfy tax withholding obligations at a reference price of $159.73 per share, treated as an exempt disposition to the issuer under Rule 16b-3(e). Following the RSU conversion, Diorio held 11,262 RSUs directly, and separately reported 199,362 shares of common stock held indirectly through DFT L.L.C.

IMPINJ INC (PI) reported that Chief Executive Officer and director Chris Diorio, Ph.D., made a bona fide gift of 10,000 shares of common stock on August 17, 2026. The disposition was effected under a Rule 10b5-1 trading plan adopted on February 23, 2026. After the gift, Diorio held 362,145 shares directly and 199,362 shares indirectly through DFT L.L.C.

IMPINJ INC chief financial officer Cary Baker reported selling 1,429 shares of common stock on August 10, 2026 at $185.00 per share. The transaction was reported as a sale and was effected pursuant to a Rule 10b5-1 trading plan effective on December 10, 2025. Following this transaction, Baker reported owning 88,226 shares of IMPINJ common stock directly.

Impinj CEO Chris Diorio reported a bona fide gift of 10,000 shares of common stock on July 13, 2026, at $0.0000 per share, made pursuant to a Rule 10b5-1 trading plan adopted on February 23, 2026. After the gift he holds 372,145 shares directly and reports 199,362 shares held indirectly by DFT L.L.C.

Impinj Inc. chief financial officer Cary Baker reported routine equity compensation activity involving restricted stock units, or RSUs. On June 23, 2026, 1,076 RSUs vested and converted into the same number of common shares. In connection with this vesting, 424 common shares were remitted to Impinj at $125.22 per share to satisfy tax withholding obligations in an exempt transaction under Rule 16b-3(e). Following these transactions, Baker directly owned 89,655 shares of Impinj common stock. The vested RSUs stem from grants of 7,665 RSUs on March 23, 2023 and 9,545 RSUs on March 23, 2024, with one-sixteenth of each grant vesting on the reported date.

Impinj CEO Chris Diorio reported routine equity compensation activity involving restricted stock units and related tax withholding. On June 23, 2026, he converted 3,040 RSUs into common stock, and 1,197 shares were remitted to Impinj at $125.22 per share to satisfy tax obligations under Rule 16b-3(e), rather than sold on the open market.

Following these transactions, Diorio directly held 382,145 shares of Impinj common stock and indirectly held 199,362 shares through DFT L.L.C. The RSUs stem from grants of 19,580 units in March 2023 and 29,075 units in March 2024, with one-sixteenth of each grant vesting on June 23, 2026.

Impinj CEO Chris Diorio reported a charitable transfer of stock. He made a bona fide gift of 10,000 shares of Impinj common stock at a stated price of $0.00 per share. After this gift, he directly owns 380,302 shares and indirectly holds 199,362 shares through DFT L.L.C. The disposition was effected under a pre-arranged Rule 10b5-1 trading plan adopted on February 23, 2026, indicating the transaction was scheduled in advance rather than timed discretionarily.

IMPINJ Inc. director reporting entity Sylebra Capital LLC reported open-market sales of common stock held for its advisory clients. The filing shows three indirect sales totaling 64,633 shares on June 8–9, 2026 at prices between $125.9651 and $130.0685 per share.

After these transactions, 775,943 shares of IMPINJ common stock are reported as indirectly held. The securities are held by Sylebra-managed funds and other advisory clients, and Sylebra entities and their principal disclaim beneficial ownership except to the extent of any pecuniary interest.

Entities advised by Sylebra Capital LLC reported selling Impinj common stock in open-market transactions. On 2026-06-09, they sold 12,105 shares at an average price of $127.3577 per share. On 2026-06-08, they sold 33,000 shares at $130.0685 and 12,528 shares at $125.9651 per share. After these sales, 782,943 shares of Impinj common stock remained indirectly held. The shares are held by Sylebra Capital Partners Master Fund, Menlo Master Fund and other advisory clients, and Sylebra entities and Daniel Patrick Gibson may be deemed to share voting and dispositive power but disclaim beneficial ownership except to the extent of any pecuniary interest.

IMPINJ INC director‑affiliated funds reported selling common stock. On 2026-06-05, entities advised by SYLEBRA CAPITAL LLC executed two open-market sales totaling 47,479 shares of Impinj common stock, at weighted prices of about $122.50 and $128.87 per share.

After these trades, the filing shows indirect holdings of 840,576 shares. The shares are held by Sylebra-managed funds and other advisory clients, and Sylebra entities and director Daniel Patrick Gibson disclaim beneficial ownership except to the extent of any pecuniary interest.

IMPINJ INC chief executive Chris Diorio reported an estate-planning share exchange involving 180,000 shares of common stock with a family trust. On the transfer date, he received 180,000 shares from the 2012 Diorio Descendants Irrevocable Trust and simultaneously transferred 180,000 shares to the same trust.

The exchange used an estimated per-share value of $156.675, based on the average high and low trading prices that day, and was carried out under a pre-arranged Rule 10b5-1 trading plan adopted in February 2026. The filing also notes indirect ownership of 199,362 shares held through DFT L.L.C.

Sylebra-affiliated investment funds sold Impinj common stock in the open market. On this Form 4, entities advised by Sylebra Capital LLC and Sylebra Capital Limited disposed of 33,412 shares of Impinj, Inc. common stock at an average price of $136.8435 per share.

After this transaction, the advisory clients, including Sylebra Capital Partners Master Fund and Sylebra Capital Menlo Master Fund, held 888,055 Impinj shares indirectly. Sylebra and related entities disclaim beneficial ownership of these securities except to the extent of any pecuniary interest.

Sylebra Capital–advised funds reported open-market sales of Impinj common stock. On June 2, entities advised by Sylebra sold 38,724 shares at an average price of $142.3145 per share. On June 3, they sold an additional 6,313 shares at $139.1663 per share.

After these transactions, the filing shows 921,467 Impinj shares indirectly held. The shares are owned by Sylebra Capital Partners Master Fund, Sylebra Capital Menlo Master Fund, and other advisory clients, and Sylebra entities and Daniel Patrick Gibson disclaim beneficial ownership except to the extent of any pecuniary interest.

Sylebra Capital LLC, as a reporting person associated with various investment entities, reported open-market sales of Impinj common stock held for advisory clients. On May 29, entities linked to Sylebra sold 48,504 shares at an average price of $150.7755 per share. On June 1, they sold an additional 7,163 shares at an average price of $144.2911. Following these transactions, the advisory clients collectively held 966,504 shares of Impinj common stock indirectly. The footnotes state that the shares are held by Sylebra Capital Partners Master Fund, Ltd., Sylebra Capital Menlo Master Fund, and other advisory clients, and that Sylebra entities and Daniel Patrick Gibson disclaim beneficial ownership except to the extent of any pecuniary interest.

Impinj director Daniel Patrick Gibson reported updates to his equity holdings. The filing shows indirect ownership of 1,022,171 shares of Impinj common stock through investment entities over which he may be deemed to share voting and dispositive power.

Gibson exercised previously granted restricted stock units, converting 3,114 RSUs into 3,114 shares of common stock at a stated price of $0.00 per share, resulting in 23,010 directly held shares of common stock after the transaction. He also received a new award of 1,896 RSUs, each representing one share of common stock, which will fully vest on May 28, 2027. Earlier RSUs granted on June 5, 2025 fully vested on May 28, 2026 before being settled into common shares.

Impinj Inc. director Arthur L. Valdez Jr. received a grant of 1,896 restricted stock units (RSUs), each representing a right to receive one share of Impinj common stock. These RSUs were awarded at no cash exercise price and will fully vest on May 28, 2027. Following this compensation-related grant, Valdez holds 1,896 derivative-linked shares directly.

Impinj director Washington Miron reported equity compensation activity involving restricted stock units (RSUs). On May 28, 2026, 3,114 RSUs granted on June 5, 2024 fully vested and were exercised into 3,114 shares of common stock, bringing his direct common share holdings to 5,154.

On the same date, he also received a new grant of 1,896 RSUs, each representing a right to one share of common stock, which will fully vest on May 28, 2027. The filing shows only acquisitions and no share sales.

Impinj director Umesh Padval reported equity compensation activity involving restricted stock units (RSUs) and common stock. On May 28, 2026, he exercised 3,114 RSUs that had been granted on June 5, 2025, receiving 3,114 shares of common stock at no cash cost.

On the same date, he also received a new grant of 1,896 RSUs, each representing a right to one share of Impinj common stock. These new RSUs are scheduled to fully vest on May 28, 2027. After these transactions, Padval directly holds 6,654 shares of common stock and 1,896 RSUs, reflecting routine director compensation rather than open-market buying or selling.

Impinj director Steve Sanghi reported routine equity compensation activity. On May 28, 2026, he exercised 3,425 restricted stock units (RSUs) into an equal number of Impinj common shares, increasing his direct common stock holdings to 13,274 shares. The filing also shows a new grant of 2,085 RSUs, each representing a contingent right to receive one share of common stock, which will fully vest on May 28, 2027. Separately, 40,200 common shares are held indirectly through the Sanghi Family Limited Partnership.

Impinj Inc. director Meera Rao reported equity compensation-related transactions with no open-market buying or selling. On May 28, 2026, 3,114 restricted stock units that had been granted on June 5, 2025 fully vested and were exercised into 3,114 shares of common stock. The filing shows Rao holding 11,322 shares of common stock directly after these transactions.

On the same date, Rao received a new grant of 1,896 restricted stock units, each representing a contingent right to receive one share of Impinj common stock. These new RSUs are scheduled to fully vest on May 28, 2027.

Sylebra-affiliated funds reported open-market sales of Impinj common stock. On May 8, 2026 and May 11, 2026, entities advised by Sylebra Capital LLC and related advisers sold an aggregate of 73,810 shares of Impinj common stock in multiple open-market transactions at prices between $149.97 and $154.46 per share.

After these sales, the reporting group shows indirect holdings of just over 1.0 million Impinj shares. The footnotes state that the securities are held by Sylebra Capital Partners Master Fund, Sylebra Capital Menlo Master Fund, and other advisory clients, and that Sylebra entities and Daniel Patrick Gibson disclaim beneficial ownership except to the extent of any pecuniary interest.

Sylebra Capital LLC, as an indirect holder of Impinj, Inc. common stock, reported open-market sales totaling 73,810 shares of the company’s stock. The trades occurred on May 8 and May 11, 2026 at prices ranging from about $149.97 to $154.46 per share. These securities are held by Sylebra-advised funds and other advisory clients, and Sylebra entities and their chief investment officer disclaim beneficial ownership except to any pecuniary interest. The filing shows that more than 1 million shares of Impinj common stock remain held indirectly after the reported sales.

IMPINJ Inc. director-affiliated entity Sylebra Capital LLC, reporting on behalf of investment funds and advisory clients, disclosed an open-market sale of 36,171 shares of common stock on May 7, 2026 at $152.73 per share. After this transaction, entities associated with Sylebra reported holding 1,095,981 shares of IMPINJ common stock indirectly. The filing notes that Sylebra entities and their principal disclaim beneficial ownership of these securities except to the extent of any pecuniary interest.

Sylebra-related investment funds completed an open-market sale of Impinj common stock. On this Form 4, Sylebra Capital LLC, a director of Impinj, reported that advisory clients, including Sylebra Capital Partners Master Fund and Sylebra Capital Menlo Master Fund, sold 36,171 shares of Impinj common stock at an average price of $152.73 per share on May 7, 2026. After this transaction, these advisory clients collectively held 1,132,152 Impinj shares indirectly reported by Sylebra. The filing notes that Sylebra entities and Daniel Gibson, who serves on Impinj’s board, may be deemed to share voting and dispositive power over these shares but disclaim beneficial ownership except to the extent of any pecuniary interest.

Impinj CFO Cary Baker reported routine equity compensation activity involving restricted stock units and common stock. On March 23, 2026, 1,858 RSUs vested and were converted into the same number of Impinj common shares. In connection with the vesting, 732 common shares were remitted to Impinj to satisfy tax withholding obligations under Rule 16b-3(e). Following these transactions, Baker directly held 89,003 shares of common stock.

Baker also received a new grant of 7,627 RSUs, each representing a right to one share of common stock. One-fourth of the shares subject to this new grant will vest on March 23, 2027, and 1/16 of the shares will vest each quarter thereafter, subject to continued service to Impinj.

Impinj CEO Chris Diorio reported routine equity compensation activity on March 23, 2026. A total of 5,635 restricted stock units, granted in prior years, were exercised into common shares, and 2,218 common shares were remitted to Impinj to cover tax withholding obligations.

Following these transactions, Diorio directly held 390,302 shares of Impinj common stock and indirectly held 199,362 shares through DFT L.L.C. He also received a new grant of 24,806 restricted stock units, with one-fourth vesting on March 23, 2027 and additional portions vesting quarterly thereafter, subject to continued service.

IMPINJ INC chief financial officer Cary Baker reported equity award activity involving company common stock. On the reported date, he acquired 8,508 shares of common stock at no cost through the vesting of previously granted performance-based restricted stock units after corporate performance goals were certified as achieved.

In a related exempt transaction, he disposed of 2,234 shares back to the company at $127.92 per share to cover tax withholding obligations triggered by the vesting. After these transactions, he directly owned 87,877 shares of IMPINJ common stock.

IMPINJ INC chief executive officer Chris Diorio reported equity-award activity involving company common stock. He acquired 21,734 shares at no cost through the vesting of performance restricted stock units that were originally granted on March 23, 2023 after meeting specified performance goals.

To cover tax withholding obligations from this vesting, he disposed of 7,435 shares back to the company at a price of $127.92 per share in an exempt transaction. After these transactions, he held 386,885 shares directly, and 199,362 shares indirectly through DFT L.L.C.

Impinj chief executive officer Chris Diorio reported a bona fide gift of common stock. On February 17, 2026, he transferred 1,836 shares of Impinj common stock at a reported price of $0.00 per share, reflecting a non-cash, charitable-style disposition.

After this gift, Diorio’s directly held common stock position was 372,586 shares. The filing also shows an additional 199,362 shares of common stock held indirectly, listed as owned "by DFT L.L.C.", indicating a separate indirect ownership line associated with him.

Impinj Inc director-linked investment entities reported three dispositions of common stock in December 2025. Transactions on 12/11, 12/12 and 12/15/2025 covered 95,345, 50,573 and 134,629 shares, respectively, at prices of $152.87, $146.62 and $150.36.

After the 12/15/2025 transaction, 1,132,152 shares were reported as beneficially owned indirectly. The filing explains that Sylebra Capital entities act as advisers or manager to the funds holding the shares, and together with director Daniel Patrick Gibson they may be deemed to share voting and dispositive power but disclaim beneficial ownership except to any pecuniary interest.

Impinj, Inc. director-affiliated investment entities reported open-market sales of the company’s common stock. On 12/03/2025, they sold 41,221 shares at $167.97 per share. Additional sales included 3,167 shares at $160.59 on 12/04/2025 and 1,373 shares at $161.04 on 12/05/2025. After these transactions, 1,499,837 shares of Impinj common stock were reported as beneficially owned indirectly. The filing explains that the shares are held by Sylebra-managed funds and advisory clients, and the Sylebra entities and Daniel Patrick Gibson, a director of Impinj, may be deemed to share voting and dispositive power but disclaim beneficial ownership except for any pecuniary interest.

Impinj Inc. (PI) chief financial officer transaction was reported on a Form 4. The reporting person, serving as chief financial officer, disclosed a transaction in Impinj common stock dated 11/25/2025 with transaction code G, indicating a transfer such as a gift. The filing shows 1,000 shares of common stock were disposed of at a price of $0. After this transaction, the officer beneficially owns 80,479 shares of Impinj common stock in direct ownership.

Impinj, Inc. (PI) had a group of affiliated investment entities and their principal file a Form 4 reporting open‑market sales of its common stock. On 11/20/2025, they reported selling 8,081 shares at an average price of $156.3249 per share. On 11/21/2025, they reported selling an additional 3,046 shares at an average price of $155.0973 per share.

Following these transactions, the group reported 1,753,445 shares of Impinj common stock beneficially owned in an indirect capacity. The filing explains that various Sylebra entities act as investment managers or advisers to funds that hold the shares and that Daniel Patrick Gibson controls those entities. The reporting persons state they may be deemed to share voting and dispositive power over the shares but disclaim beneficial ownership beyond any pecuniary interest.

Impinj, Inc. (PI) reported an insider stock gift by its Chief Executive Officer and director. On 11/19/2025, the reporting person donated 7,000 shares of Impinj common stock as a gift to a donor advised fund, recorded at a price of $0 per share because it was a charitable transfer rather than a sale. Following this transaction, the reporting person beneficially owned 371,005 shares of common stock directly and 199,362 shares indirectly through DFT L.L.C.

Impinj, Inc. (PI) insiders affiliated with Sylebra reported a sale of 30,000 shares of common stock at $155.63 on 11/11/2025, per a Form 4 filing. Following the transaction, the group reported 1,768,344 shares beneficially owned on an indirect basis.

Footnotes state the securities are held by Sylebra-managed funds and advisory clients. Daniel Patrick Gibson is noted as a director, and the reporting persons disclaim beneficial ownership except to the extent of any pecuniary interest.

Impinj (PI) reporting persons affiliated with Sylebra disclosed an open‑market sale of 6,246 shares of common stock at $162.16 on 11/07/2025. After the transaction, they reported 1,798,344 shares beneficially owned in indirect form.

The filing was made by more than one reporting person. Footnotes state the shares are held by Sylebra-managed funds, with Sylebra entities and Daniel Patrick Gibson (a board member) disclaiming beneficial ownership except to the extent of any pecuniary interest.

Impinj, Inc. (PI) — Form 4 insider transaction. Reporting persons affiliated with Sylebra disclosed a sale of Impinj common stock on 11/06/2025. The filing reports a disposition (Code S) of 23,157 shares at a price of $171.95 per share.

Following the transaction, 1,804,590 shares were reported as beneficially owned on an indirect basis, as noted in the filing. Footnotes state the securities are held by Sylebra-managed funds and advisory clients, that certain Sylebra entities may be deemed to share voting and dispositive power, and that beneficial ownership is disclaimed except to the extent of any pecuniary interest. Daniel Patrick Gibson is identified as a director of Impinj.

Impinj, Inc. (PI) director Form 4: A reporting person serving as a director reported an open-market sale of 342 shares of common stock on 11/07/2025 at a weighted average price of $158.9374 (transaction code S). Following the sale, the filer reported 2,040 shares beneficially owned, held in direct ownership.

The filing indicates it was submitted by attorney-in-fact /s/ Yukio Morikubo for the reporting person. No derivative securities were listed in Table II.

Impinj (PI) insiders reported a stock sale. A group filing disclosed the sale of 1,513 shares of common stock on 11/03/2025 at $202.01 per share. Following the transaction, 1,827,747 shares were reported as beneficially owned on an indirect basis, with the nature of ownership described in the footnotes.

The report was filed by more than one reporting person, including Sylebra-affiliated entities and Daniel Patrick Gibson, who serves as a director. The footnotes state that certain parties disclaim beneficial ownership except to the extent of any pecuniary interest.

Impinj (PI) insider transaction: CEO and Director Chris Diorio reported exercising stock options for 23,500 shares of common stock at $22.40 on 10/30/2025 (transaction code M). Following the transaction, beneficial ownership stands at 378,005 shares direct and 199,362 shares indirect by DFT L.L.C. The exercised option covered 23,500 underlying shares and now shows 0 remaining; it was fully vested on June 11, 2022 and had an expiration of 06/15/2028.

Impinj, Inc. (PI): Director equity grant reported. Director Arthur L. Valdez, Jr. reported an award of 1,220 restricted stock units on 10/20/2025. Each RSU represents a contingent right to receive one share of Impinj common stock and carries no exercise price. The RSUs will fully vest on October 20, 2026, subject to the award’s terms. Following the transaction, 1,220 derivative securities were beneficially owned directly.