Follow the people · Insider
Sean Patrick Buckley
Sean Patrick Buckley files insider transactions with the SEC as an officer of Magnite (MGNI). We hold 5 disclosed purchases and sales filed since 3 June 2021, 5 of them in the last 90 days.
- Files forMGNI
- Disclosed buys and sells5 in all, 5 in the last 90 days
- Last disclosure18 August 2026
Positions held
1 post we hold — a term names its own dates; a run of filings only says when they filed- Filed 1 June 2021 — 18 August 2026Officer · Magnite (MGNI)68 Form 4 lines · source: SEC Form 4
Everything they disclosed
68 entries, newest first — one per disclosure report, one per Form 4 line- had shares withheld for tax on 11,715 shares of MagniteSEC Form 418 August 2026Common Stock · traded 15 August 2026 · filed 18 August 2026
- ▼ sold on the open market 8,271 shares of MagniteSEC Form 418 August 2026Common Stock · traded 17 August 2026 · filed 18 August 2026
- ▼ sold on the open market 2,759 shares of MagniteSEC Form 418 August 2026Common Stock · traded 18 August 2026 · filed 18 August 2026
- exercised options over 28,703 shares of MagniteSEC Form 47 August 2026Common Stock · traded 6 August 2026 · filed 7 August 2026
- ▼ sold on the open market 47,942 shares of MagniteSEC Form 47 August 2026Common Stock · traded 6 August 2026 · filed 7 August 2026
- ▼ sold on the open market 19,237 shares of MagniteSEC Form 47 August 2026Common Stock · traded 6 August 2026 · filed 7 August 2026
- exercised options over 28,703 shares of Magnite (a derivative holding)SEC Form 47 August 2026Stock Option (right to buy) · traded 6 August 2026 · filed 7 August 2026
- ▼ sold on the open market 19,233 shares of MagniteSEC Form 49 July 2026Common Stock · traded 7 July 2026 · filed 9 July 2026
- ▼ sold on the open market 19,233 shares of MagniteSEC Form 418 June 2026Common Stock · traded 17 June 2026 · filed 18 June 2026
- had shares withheld for tax on 12,019 shares of MagniteSEC Form 419 May 2026Common Stock · traded 15 May 2026 · filed 19 May 2026
- had shares withheld for tax on 26,942 shares of MagniteSEC Form 418 February 2026Common Stock · traded 15 February 2026 · filed 18 February 2026
- had shares withheld for tax on 26,942 shares of MagniteSEC Form 418 February 2026Common Stock · traded 15 February 2026 · filed 18 February 2026
- exercised options over 64,125 shares of MagniteSEC Form 412 January 2026Common Stock · traded 9 January 2026 · filed 12 January 2026
- had shares withheld for tax on 30,369 shares of MagniteSEC Form 412 January 2026Common Stock · traded 9 January 2026 · filed 12 January 2026
- exercised options over 64,125 shares of Magnite (a derivative holding)SEC Form 412 January 2026Performance Stock Units · traded 9 January 2026 · filed 12 January 2026
- exercised options over 64,125 shares of Magnite (a derivative holding)SEC Form 412 January 2026Performance Stock Units · traded 9 January 2026 · filed 12 January 2026
- exercised options over 64,125 shares of MagniteSEC Form 412 January 2026Common Stock · traded 9 January 2026 · filed 12 January 2026
- had shares withheld for tax on 30,369 shares of MagniteSEC Form 412 January 2026Common Stock · traded 9 January 2026 · filed 12 January 2026
- was granted 127,273 shares of MagniteSEC Form 45 January 2026Common Stock · traded 1 January 2026 · filed 5 January 2026
- was granted 42,757 shares of Magnite (a derivative holding)SEC Form 45 January 2026Performance Stock Units · traded 1 January 2026 · filed 5 January 2026
- was granted 42,757 shares of Magnite (a derivative holding)SEC Form 45 January 2026Performance Stock Units · traded 1 January 2026 · filed 5 January 2026
- was granted 127,273 shares of MagniteSEC Form 45 January 2026Common Stock · traded 1 January 2026 · filed 5 January 2026
- ▼ sold on the open market 2,213 shares of MagniteSEC Form 426 November 2025Common Stock · traded 24 November 2025 · filed 26 November 2025
- had shares withheld for tax on 11,642 shares of MagniteSEC Form 418 November 2025Common Stock · traded 15 November 2025 · filed 18 November 2025
- ▼ sold on the open market 4,426 shares of MagniteSEC Form 418 November 2025Common Stock · traded 18 November 2025 · filed 18 November 2025
- ▼ sold on the open market 20,000 shares of MagniteSEC Form 410 September 2025Common Stock · traded 8 September 2025 · filed 10 September 2025
- ▼ sold on the open market 20,000 shares of MagniteSEC Form 410 September 2025Common Stock · traded 9 September 2025 · filed 10 September 2025
- ▼ sold on the open market 10,886 shares of MagniteSEC Form 420 August 2025Common Stock · traded 18 August 2025 · filed 20 August 2025
- ▼ sold on the open market 9,315 shares of MagniteSEC Form 420 August 2025Common Stock · traded 19 August 2025 · filed 20 August 2025
- had shares withheld for tax on 15,049 shares of MagniteSEC Form 416 May 2025Common Stock · traded 15 May 2025 · filed 16 May 2025
- ▼ sold on the open market 9,692 shares of MagniteSEC Form 416 May 2025Common Stock · traded 16 May 2025 · filed 16 May 2025
- ▼ sold on the open market 10,527 shares of MagniteSEC Form 421 February 2025Common Stock · traded 19 February 2025 · filed 21 February 2025
- had shares withheld for tax on 27,444 shares of MagniteSEC Form 419 February 2025Common Stock · traded 15 February 2025 · filed 19 February 2025
- ▼ sold on the open market 18,693 shares of MagniteSEC Form 47 February 2025Common Stock · traded 7 February 2025 · filed 7 February 2025
- was granted 41,566 shares of Magnite (a derivative holding)SEC Form 413 January 2025Performance Stock Units · traded 9 January 2025 · filed 13 January 2025
- was granted 123,479 shares of MagniteSEC Form 413 January 2025Common Stock · traded 9 January 2025 · filed 13 January 2025
- had shares withheld for tax on 10,133 shares of MagniteSEC Form 419 November 2024Common Stock · traded 15 November 2024 · filed 19 November 2024
- ▼ sold on the open market 10,001 shares of MagniteSEC Form 419 November 2024Common Stock · traded 18 November 2024 · filed 19 November 2024
- ▼ sold on the open market 2,623 shares of MagniteSEC Form 413 November 2024Common Stock · traded 11 November 2024 · filed 13 November 2024
- ▼ sold on the open market 2,619 shares of MagniteSEC Form 413 November 2024Common Stock · traded 11 November 2024 · filed 13 November 2024
- ▼ sold on the open market 2,623 shares of MagniteSEC Form 421 August 2024Common Stock · traded 19 August 2024 · filed 21 August 2024
- ▼ sold on the open market 2,623 shares of MagniteSEC Form 421 August 2024Common Stock · traded 20 August 2024 · filed 21 August 2024
- had shares withheld for tax on 9,646 shares of MagniteSEC Form 416 August 2024Common Stock · traded 15 August 2024 · filed 16 August 2024
- ▼ sold on the open market 19,607 shares of MagniteSEC Form 417 July 2024Common Stock · traded 15 July 2024 · filed 17 July 2024
- ▼ sold on the open market 19,604 shares of MagniteSEC Form 417 July 2024Common Stock · traded 16 July 2024 · filed 17 July 2024
- ▼ sold on the open market 21,653 shares of MagniteSEC Form 47 June 2024Common Stock · traded 5 June 2024 · filed 7 June 2024
- ▼ sold on the open market 2,682 shares of MagniteSEC Form 429 May 2024Common Stock · traded 24 May 2024 · filed 29 May 2024
- had shares withheld for tax on 9,407 shares of MagniteSEC Form 417 May 2024Common Stock · traded 15 May 2024 · filed 17 May 2024
- ▼ sold on the open market 16,925 shares of MagniteSEC Form 417 May 2024Common Stock · traded 16 May 2024 · filed 17 May 2024
- had shares withheld for tax on 24,110 shares of MagniteSEC Form 416 February 2024Common Stock · traded 15 February 2024 · filed 16 February 2024
- was granted 50,752 shares of Magnite (a derivative holding)SEC Form 44 January 2024Performance Stock Units · traded 2 January 2024 · filed 4 January 2024
- was granted 142,276 shares of MagniteSEC Form 44 January 2024Common Stock · traded 2 January 2024 · filed 4 January 2024
- had shares withheld for tax on 5,078 shares of MagniteSEC Form 417 November 2023Common Stock · traded 15 November 2023 · filed 17 November 2023
- ▼ sold on the open market 5,273 shares of MagniteSEC Form 418 August 2023Common Stock · traded 16 August 2023 · filed 18 August 2023
- ▼ sold on the open market 12,219 shares of MagniteSEC Form 46 June 2023Common Stock · traded 2 June 2023 · filed 6 June 2023
- ▼ sold on the open market 5,640 shares of MagniteSEC Form 418 May 2023Common Stock · traded 16 May 2023 · filed 18 May 2023
- had shares withheld for tax on 15,401 shares of MagniteSEC Form 417 February 2023Common Stock · traded 15 February 2023 · filed 17 February 2023
- was granted 50,752 shares of Magnite (a derivative holding)SEC Form 44 January 2023Performance Stock Units · traded 1 January 2023 · filed 4 January 2023
- was granted 142,276 shares of MagniteSEC Form 44 January 2023Common Stock · traded 1 January 2023 · filed 4 January 2023
- had shares withheld for tax on 1,632 shares of MagniteSEC Form 417 November 2022Common Stock · traded 15 November 2022 · filed 17 November 2022
- had shares withheld for tax on 1,632 shares of MagniteSEC Form 417 August 2022Common Stock · traded 15 August 2022 · filed 17 August 2022
- had shares withheld for tax on 11,185 shares of MagniteSEC Form 43 June 2022Common Stock · traded 1 June 2022 · filed 3 June 2022
- had shares withheld for tax on 6,525 shares of MagniteSEC Form 417 May 2022Common Stock · traded 15 May 2022 · filed 17 May 2022
- was granted 86,108 shares of Magnite (a derivative holding)SEC Form 43 February 2022Stock Option (Right to Buy) · traded 1 February 2022 · filed 3 February 2022
- was granted 121,024 shares of MagniteSEC Form 43 February 2022Common Stock · traded 1 February 2022 · filed 3 February 2022
- was granted 43,788 shares of Magnite (a derivative holding)SEC Form 43 June 2021Stock Option (Right to Buy) · traded 1 June 2021 · filed 3 June 2021
- was granted 58,843 shares of MagniteSEC Form 43 June 2021Common Stock · traded 1 June 2021 · filed 3 June 2021
- was granted 50,437 shares of MagniteSEC Form 43 June 2021Common Stock · traded 1 June 2021 · filed 3 June 2021
Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.