Impinj Inc SEC Filings

Impinj, Inc. (PI) disclosed an insider ownership update: Arthur L. Valdez, Jr. filed a Form 3 as a director, stating that no securities are beneficially owned as of 10/20/2025.

The filing is by one reporting person and lists no non-derivative or derivative holdings.

Impinj, Inc. (PI) expanded and refreshed its board. On October 20, 2025, the Board set its size at seven directors and appointed Arthur L. Valdez Jr. as a director, effective immediately, with an initial term expiring at the next annual meeting of stockholders.

The company states there were no arrangements or understandings behind his selection and no related party transactions requiring disclosure. Mr. Valdez will participate in Impinj’s outside director compensation policy and enter into the company’s standard indemnification agreement.

Chris Diorio, CEO and director of Impinj Inc. (PI), reported multiple transactions tied to the vesting of restricted stock units (RSUs) on 09/23/2025. Portions of RSU grants vested and were converted into common stock: 2,594; 1,224; and 1,818 shares were recorded as acquired under Rule 16b-3 exemptions, increasing his direct holdings. Concurrently, 2,219 shares were remitted to Impinj to satisfy tax withholding at a price of $184.97 per share. After these transactions, Diorio beneficially owns 356,724 shares directly and 199,362 shares indirectly through DFT L.L.C.

Cary Baker, Chief Financial Officer of Impinj Inc. (PI), reported multiple transactions on 09/23/2025 related to the vesting and settlement of restricted stock units (RSUs) and a sale. A total of 1,857 RSUs vested (781 + 479 + 597) and were recorded as acquired in the non-derivative and derivative tables; these RSUs convert one-for-one into common shares. Separately, 732 shares were disposed of in a transaction priced at $184.97 per share, and the reporting person remitted shares to the issuer to satisfy tax withholding obligations arising from RSU vesting. Following the transactions, the reporting person beneficially owned 81,479 shares (after the sale and withholding).

Chris Diorio, Ph.D., Chief Executive Officer and Director of Impinj Inc. (PI), reported insider transactions dated 09/18/2025. The filing shows non-derivative purchases of 47,039 and 7,036 shares of Common Stock on 09/18/2025 at reported prices of $33.77 and $22.40, respectively. Following those transactions the report lists 351,088 shares beneficially owned directly and 199,362 shares beneficially owned indirectly through DFT L.L.C. The filing also reports derivative entries showing stock options tied to the same amounts and exercise prices, with vesting dates noted as July 3, 2021 and June 11, 2022. The document was signed 09/19/2025.

Chris Diorio, Director and Chief Executive Officer of Impinj Inc. (PI), reported sales of common stock effected under a Rule 10b5-1 trading plan on September 15-16, 2025. The filing lists ten sell transactions that aggregate to 9,096 shares sold at weighted-average prices for each batch ranging from about $179.26 up to $191.76 as detailed in the form. Following these transactions, the filing shows Mr. Diorio directly beneficially owns 297,013 shares and indirectly owns 199,362 shares through DFT L.L.C.

The form includes explanatory notes that the reported amounts and prices reflect aggregated multiple transactions within specified per-share price ranges and that full per-transaction detail is available on request.

Chris Diorio, Chief Executive Officer and Director of Impinj, Inc. (PI), reported a gift disposition of 30,000 common shares on 09/12/2025 under Code G(1). The filing states this transfer is permitted by a lock-up agreement tied to the companys September 2025 0% Convertible Senior Notes offering, allowing Diorio to gift up to 30,000 shares during the lock-up period. After the reported transaction, Diorio beneficially owns 306,109 shares directly and 199,362 shares indirectly via DFT L.L.C. The Form 4 was signed by an attorney in fact on 09/16/2025.

Sylebra Capital and affiliated entities reported owning 1,829,260 shares of Impinj Inc. common stock, equal to 6.29% of the class. This filing is an amendment to a prior Schedule 13D and reflects a disposal of securities executed in the ordinary course of portfolio management. The filing names four reporting persons — Sylebra Capital LLC, Sylebra Capital Ltd, Sylebra Capital Management, Ltd and Daniel Patrick Gibson — and states that they share voting and dispositive power over the reported shares through affiliated investment entities. The amendment attaches a Joint Filing Agreement and otherwise leaves prior Schedule 13D disclosures unchanged.

Impinj, Inc. Form 144 notice shows a proposed sale of 300,000 shares of common stock through Morgan Stanley & Co. LLC on NASDAQ, with an aggregate market value of $58,873,670. The filing reports 1,829,260 shares outstanding, so the proposed sale represents approximately 16.4% of outstanding shares. The securities were acquired on 03/01/2018 via open market purchases and payment was made DVP–Cash. No sales by the reporting person were reported in the past three months. The filer certifies they are unaware of undisclosed material adverse information about the issuer.