Welcome to our dedicated page for BOOST RUN SEC filings (Ticker: BRUN), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
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Boost Run Inc. notified the SEC that it cannot, without unreasonable effort or expense, timely file its Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2026. The company states it needs additional time to compile required information and expects to file the Q1 2026 Form 10-Q no later than June 1, 2026.
The notice was signed by Erik Guckel, Chief Financial Officer, on May 26, 2026. Contact information listed includes telephone 847-812-3764. The filing cites Rule 12b-25 and includes standard forward-looking statement cautionary language.
Boost Run Inc. Schedule 13G: a group of Citadel entities and Kenneth Griffin jointly report beneficial ownership of Class A common stock. Citadel Advisors LLC and related entities may be deemed to beneficially own 1,516,090 shares (4.8%). Citadel Securities LLC may be deemed to beneficially own 224,223 shares (0.7%). Kenneth Griffin may be deemed to beneficially own 1,740,313 shares (5.5%). The filing cites 31,895,656 Shares outstanding as of May 8, 2026 and notes holdings may include instruments exercisable for or convertible into Shares.
Goodrich ILMJS LLC filed a Schedule 13D reporting beneficial ownership of 2,065,385 shares of Boost Run Inc. Class A common stock, representing 6.48% of the class. The position stems from Boost Run’s SPAC business combination completed on May 8, 2026 and related equity issuances.
The filing explains that Goodrich ILMJS LLC is the record holder, while Sean Goodrich, its managing member and a Boost Run director, has voting and investment discretion over these shares. Goodrich ILMJS LLC is also attributed 1,272,885 additional Class A shares and 1,101,986 warrants subject to an Amended and Restated Transfer Agreement with Willow Lane Sponsor, plus potential earnout shares under a separate Earnout Agreement tied to stock performance.
Boost Run Inc. director and ten percent owner Weil B. Luke reported his initial holdings in a Form 3. The filing shows that securities are held indirectly through Willow Lane Sponsor, LLC, which is the record holder. Mr. Weil is the sole managing member of the Sponsor and has voting and investment discretion over these holdings, while disclaiming beneficial ownership beyond any pecuniary interest.
The Sponsor holds 4,628,674 shares of Class A common stock and 4,007,222 warrants, each warrant exercisable for one share of Class A common stock at an exercise price of $11.50 per share until May 8, 2031, subject to a 9.8% ownership blocker. This Form 3 reflects existing positions rather than new purchases or sales.
Boost Run Inc. director Sean Goodrich has filed a Schedule 13D reporting beneficial ownership of 2,065,385 shares of Class A common stock, representing 6.48% of the class. The shares are held of record by Goodrich ILMJS LLC, where he is managing member with voting and investment discretion.
The position arises from Boost Run’s SPAC business combination completed on May 8, 2026, and related agreements. A Transfer Agreement with Willow Lane Sponsor, LLC covers 27.5% of 4,628,674 Founder Shares and 27.5% of 4,007,222 warrants at $1.75 per Founder Share, with securities held in escrow until closing conditions are met. An Earnout Agreement allows the sponsor to earn up to 1,125,000 shares and the SPV up to 1,968,750 shares based on Class A stock performance, alongside lock-up and registration rights arrangements that govern when and how these securities may be sold.
Boost Run Inc. CEO Andrew Karos reports significant ownership after the company’s SPAC business combination. He beneficially owns 29,533,018 shares of Class B Common Stock, treated as convertible into an equal number of Class A shares, representing 48.08% of the Class A Common Stock on an as-converted basis.
The Class B shares automatically convert into Class A shares upon certain events, including transfers, his departure as an executive or director, or if his Class B holdings fall below 40% of the amount held immediately after closing. Karos has sole voting and dispositive power over these shares and is party to lock-up and registration rights agreements related to the transaction that took Boost Run public.
Boost Run Inc. reported that A23 Revocable Trust No.1, Dated January 26, 2026 is a more than 10% beneficial owner of the company’s Class A common stock. The trust holds 8,016,095 shares of Class A Common Stock, par value $0.0001 per share, in a direct ownership position.
Boost Run Inc. filed an initial statement of beneficial ownership showing that Chief Executive Officer and director Karos Andrew directly holds 29,533,018 shares of Class B Common Stock. Each Class B share is convertible into one share of Class A Common Stock under the terms described.
The filing lists this large Class B position, which currently represents Andrew’s direct holding, and does not report any recent purchases or sales. The Class B shares automatically convert into Class A shares upon certain events, including specified transfers, his ceasing to serve as an executive or director, or his beneficial ownership falling below 40% of his initial Class B stake, subject to stated exceptions.
Boost Run Inc. filed an initial Form 3 to report that Jeffrey Kleinops is a director of the company. The filing does not list any share holdings or transactions, so it serves purely as an initial ownership statement confirming his insider status with Boost Run Inc.
Boost Run Inc. director and Chief Operating Officer Georgakopoulos Harilaos has filed an initial Form 3 reporting his beneficial ownership in the company. The filing shows indirect ownership of 8,016,095 shares of Class A common stock, held "By Self as Trustee for the A23 Revocable Trust No.1." This Form 3 records an existing position and does not report any new buy or sell transaction.