Follow the people · Insider
Mike Slessor
Mike Slessor files insider transactions with the SEC as a ceo of Formfactor (FORM). We hold 9 disclosed purchases and sales filed since 8 November 2013, 3 of them in the last 90 days.
- Files forFORM
- Disclosed buys and sells9 in all, 3 in the last 90 days
- Last disclosure17 August 2026
Positions held
2 posts we hold — a term names its own dates; a run of filings only says when they filed- Filed 6 November 2013 — 14 August 2026CEO · Formfactor (FORM)399 Form 4 lines · source: SEC Form 4
- Filed 12 December 2025 — 27 May 2026Director · Benchmark Electronics (BHE)2 Form 4 lines · source: SEC Form 4
Everything they disclosed
120 entries, newest first — one per disclosure report, one per Form 4 line- ▼ sold on the open market 2,482 shares of FormfactorSEC Form 417 August 2026Common Stock · traded 14 August 2026 · filed 17 August 2026
- ▼ sold on the open market 2,892 shares of FormfactorSEC Form 417 August 2026Common Stock · traded 14 August 2026 · filed 17 August 2026
- ▼ sold on the open market 3,282 shares of FormfactorSEC Form 417 August 2026Common Stock · traded 14 August 2026 · filed 17 August 2026
- ▼ sold on the open market 1,125 shares of FormfactorSEC Form 417 August 2026Common Stock · traded 14 August 2026 · filed 17 August 2026
- ▼ sold on the open market 5,535 shares of FormfactorSEC Form 417 August 2026Common Stock · traded 14 August 2026 · filed 17 August 2026
- exercised options over 141,792 shares of FormfactorSEC Form 410 August 2026Common Stock · traded 7 August 2026 · filed 10 August 2026
- had shares withheld for tax on 78,908 shares of FormfactorSEC Form 410 August 2026Common Stock · traded 7 August 2026 · filed 10 August 2026
- exercised options over 5,908 shares of FormfactorSEC Form 410 August 2026Common Stock · traded 7 August 2026 · filed 10 August 2026
- had shares withheld for tax on 3,288 shares of FormfactorSEC Form 410 August 2026Common Stock · traded 7 August 2026 · filed 10 August 2026
- was granted 27,696 shares of Formfactor (a derivative holding)SEC Form 410 August 2026Restricted Stock Units · traded 6 August 2026 · filed 10 August 2026
- was granted 141,792 shares of Formfactor (a derivative holding)SEC Form 410 August 2026Performance-based Restricted Stock Units · traded 7 August 2026 · filed 10 August 2026
- exercised options over 141,792 shares of Formfactor (a derivative holding)SEC Form 410 August 2026Performance-based Restricted Stock Units · traded 7 August 2026 · filed 10 August 2026
- exercised options over 5,908 shares of Formfactor (a derivative holding)SEC Form 410 August 2026Restricted Stock Units · traded 7 August 2026 · filed 10 August 2026
- exercised options over 3,644 shares of FormfactorSEC Form 47 August 2026Common Stock · traded 5 August 2026 · filed 7 August 2026
- had shares withheld for tax on 2,028 shares of FormfactorSEC Form 47 August 2026Common Stock · traded 5 August 2026 · filed 7 August 2026
- exercised options over 6,031 shares of FormfactorSEC Form 47 August 2026Common Stock · traded 6 August 2026 · filed 7 August 2026
- had shares withheld for tax on 3,357 shares of FormfactorSEC Form 47 August 2026Common Stock · traded 6 August 2026 · filed 7 August 2026
- exercised options over 3,644 shares of Formfactor (a derivative holding)SEC Form 47 August 2026Restricted Stock Units · traded 5 August 2026 · filed 7 August 2026
- exercised options over 6,031 shares of Formfactor (a derivative holding)SEC Form 47 August 2026Restricted Stock Units · traded 6 August 2026 · filed 7 August 2026
- ▼ sold on the open market 1,041 shares of FormfactorSEC Form 416 July 2026Common Stock · traded 15 July 2026 · filed 16 July 2026
- ▼ sold on the open market 1,650 shares of FormfactorSEC Form 416 July 2026Common Stock · traded 15 July 2026 · filed 16 July 2026
- ▼ sold on the open market 706 shares of FormfactorSEC Form 416 July 2026Common Stock · traded 15 July 2026 · filed 16 July 2026
- ▼ sold on the open market 170 shares of FormfactorSEC Form 416 July 2026Common Stock · traded 15 July 2026 · filed 16 July 2026
- ▼ sold on the open market 300 shares of FormfactorSEC Form 416 July 2026Common Stock · traded 15 July 2026 · filed 16 July 2026
- ▼ sold on the open market 868 shares of FormfactorSEC Form 416 July 2026Common Stock · traded 15 July 2026 · filed 16 July 2026
- ▼ sold on the open market 1,399 shares of FormfactorSEC Form 411 June 2026Common Stock · traded 10 June 2026 · filed 11 June 2026
- ▼ sold on the open market 767 shares of FormfactorSEC Form 411 June 2026Common Stock · traded 10 June 2026 · filed 11 June 2026
- ▼ sold on the open market 400 shares of FormfactorSEC Form 411 June 2026Common Stock · traded 10 June 2026 · filed 11 June 2026
- ▼ sold on the open market 975 shares of FormfactorSEC Form 411 June 2026Common Stock · traded 10 June 2026 · filed 11 June 2026
- ▼ sold on the open market 4,220 shares of FormfactorSEC Form 411 June 2026Common Stock · traded 10 June 2026 · filed 11 June 2026
- ▼ sold on the open market 2,500 shares of FormfactorSEC Form 411 June 2026Common Stock · traded 10 June 2026 · filed 11 June 2026
- ▼ sold on the open market 1,629 shares of FormfactorSEC Form 411 June 2026Common Stock · traded 10 June 2026 · filed 11 June 2026
- was granted 2,093 shares of Benchmark ElectronicsSEC Form 428 May 2026Common Stock · traded 27 May 2026 · filed 28 May 2026
- ▼ sold on the open market 700 shares of FormfactorSEC Form 414 May 2026Common Stock · traded 13 May 2026 · filed 14 May 2026
- ▼ sold on the open market 200 shares of FormfactorSEC Form 414 May 2026Common Stock · traded 13 May 2026 · filed 14 May 2026
- ▼ sold on the open market 66 shares of FormfactorSEC Form 414 May 2026Common Stock · traded 13 May 2026 · filed 14 May 2026
- ▼ sold on the open market 702 shares of FormfactorSEC Form 414 May 2026Common Stock · traded 13 May 2026 · filed 14 May 2026
- ▼ sold on the open market 1,300 shares of FormfactorSEC Form 414 May 2026Common Stock · traded 13 May 2026 · filed 14 May 2026
- ▼ sold on the open market 2,984 shares of FormfactorSEC Form 414 May 2026Common Stock · traded 13 May 2026 · filed 14 May 2026
- ▼ sold on the open market 1,388 shares of FormfactorSEC Form 414 May 2026Common Stock · traded 13 May 2026 · filed 14 May 2026
- ▼ sold on the open market 398 shares of FormfactorSEC Form 414 May 2026Common Stock · traded 13 May 2026 · filed 14 May 2026
- ▼ sold on the open market 100 shares of FormfactorSEC Form 414 May 2026Common Stock · traded 13 May 2026 · filed 14 May 2026
- ▼ sold on the open market 700 shares of FormfactorSEC Form 414 May 2026Common Stock · traded 13 May 2026 · filed 14 May 2026
- ▼ sold on the open market 700 shares of FormfactorSEC Form 414 May 2026Common Stock · traded 13 May 2026 · filed 14 May 2026
- ▼ sold on the open market 200 shares of FormfactorSEC Form 414 May 2026Common Stock · traded 13 May 2026 · filed 14 May 2026
- exercised options over 5,908 shares of FormfactorSEC Form 48 May 2026Common Stock · traded 7 May 2026 · filed 8 May 2026
- had shares withheld for tax on 3,288 shares of FormfactorSEC Form 48 May 2026Common Stock · traded 7 May 2026 · filed 8 May 2026
- exercised options over 5,908 shares of Formfactor (a derivative holding)SEC Form 48 May 2026Restricted Stock Units · traded 7 May 2026 · filed 8 May 2026
- exercised options over 3,644 shares of FormfactorSEC Form 47 May 2026Common Stock · traded 5 May 2026 · filed 7 May 2026
- had shares withheld for tax on 2,028 shares of FormfactorSEC Form 47 May 2026Common Stock · traded 5 May 2026 · filed 7 May 2026
- exercised options over 6,031 shares of FormfactorSEC Form 47 May 2026Common Stock · traded 6 May 2026 · filed 7 May 2026
- had shares withheld for tax on 3,357 shares of FormfactorSEC Form 47 May 2026Common Stock · traded 6 May 2026 · filed 7 May 2026
- exercised options over 3,644 shares of Formfactor (a derivative holding)SEC Form 47 May 2026Restricted Stock Units · traded 5 May 2026 · filed 7 May 2026
- exercised options over 6,031 shares of Formfactor (a derivative holding)SEC Form 47 May 2026Restricted Stock Units · traded 6 May 2026 · filed 7 May 2026
- ▼ sold on the open market 1,826 shares of FormfactorSEC Form 415 April 2026Common Stock · traded 15 April 2026 · filed 15 April 2026
- ▼ sold on the open market 900 shares of FormfactorSEC Form 415 April 2026Common Stock · traded 15 April 2026 · filed 15 April 2026
- ▼ sold on the open market 2,369 shares of FormfactorSEC Form 415 April 2026Common Stock · traded 15 April 2026 · filed 15 April 2026
- ▼ sold on the open market 5,432 shares of FormfactorSEC Form 415 April 2026Common Stock · traded 15 April 2026 · filed 15 April 2026
- ▼ sold on the open market 767 shares of FormfactorSEC Form 415 April 2026Common Stock · traded 15 April 2026 · filed 15 April 2026
- ▼ sold on the open market 1,900 shares of FormfactorSEC Form 418 March 2026Common Stock · traded 18 March 2026 · filed 18 March 2026
- ▼ sold on the open market 5,495 shares of FormfactorSEC Form 418 March 2026Common Stock · traded 18 March 2026 · filed 18 March 2026
- ▼ sold on the open market 2,832 shares of FormfactorSEC Form 418 March 2026Common Stock · traded 18 March 2026 · filed 18 March 2026
- ▼ sold on the open market 1,900 shares of FormfactorSEC Form 418 March 2026Common Stock · traded 18 March 2026 · filed 18 March 2026
- ▼ sold on the open market 5,495 shares of FormfactorSEC Form 418 March 2026Common Stock · traded 18 March 2026 · filed 18 March 2026
- ▼ sold on the open market 2,832 shares of FormfactorSEC Form 418 March 2026Common Stock · traded 18 March 2026 · filed 18 March 2026
- ▼ sold on the open market 834 shares of FormfactorSEC Form 418 February 2026Common Stock · traded 18 February 2026 · filed 18 February 2026
- ▼ sold on the open market 4,934 shares of FormfactorSEC Form 418 February 2026Common Stock · traded 18 February 2026 · filed 18 February 2026
- ▼ sold on the open market 2,896 shares of FormfactorSEC Form 418 February 2026Common Stock · traded 18 February 2026 · filed 18 February 2026
- ▼ sold on the open market 834 shares of FormfactorSEC Form 418 February 2026Common Stock · traded 18 February 2026 · filed 18 February 2026
- ▼ sold on the open market 4,934 shares of FormfactorSEC Form 418 February 2026Common Stock · traded 18 February 2026 · filed 18 February 2026
- ▼ sold on the open market 2,896 shares of FormfactorSEC Form 418 February 2026Common Stock · traded 18 February 2026 · filed 18 February 2026
- exercised options over 5,908 shares of FormfactorSEC Form 411 February 2026Common Stock · traded 9 February 2026 · filed 11 February 2026
- had shares withheld for tax on 3,288 shares of FormfactorSEC Form 411 February 2026Common Stock · traded 9 February 2026 · filed 11 February 2026
- exercised options over 5,908 shares of Formfactor (a derivative holding)SEC Form 411 February 2026Restricted Stock Units · traded 9 February 2026 · filed 11 February 2026
- exercised options over 5,908 shares of Formfactor (a derivative holding)SEC Form 411 February 2026Restricted Stock Units · traded 9 February 2026 · filed 11 February 2026
- exercised options over 5,908 shares of FormfactorSEC Form 411 February 2026Common Stock · traded 9 February 2026 · filed 11 February 2026
- had shares withheld for tax on 3,288 shares of FormfactorSEC Form 411 February 2026Common Stock · traded 9 February 2026 · filed 11 February 2026
- exercised options over 3,644 shares of FormfactorSEC Form 49 February 2026Common Stock · traded 5 February 2026 · filed 9 February 2026
- had shares withheld for tax on 2,095 shares of FormfactorSEC Form 49 February 2026Common Stock · traded 5 February 2026 · filed 9 February 2026
- exercised options over 6,031 shares of FormfactorSEC Form 49 February 2026Common Stock · traded 6 February 2026 · filed 9 February 2026
- exercised options over 3,644 shares of Formfactor (a derivative holding)SEC Form 49 February 2026Restricted Stock Units · traded 5 February 2026 · filed 9 February 2026
- exercised options over 6,031 shares of Formfactor (a derivative holding)SEC Form 49 February 2026Restricted Stock Units · traded 6 February 2026 · filed 9 February 2026
- had shares withheld for tax on 3,357 shares of FormfactorSEC Form 49 February 2026Common Stock · traded 6 February 2026 · filed 9 February 2026
- exercised options over 3,644 shares of Formfactor (a derivative holding)SEC Form 49 February 2026Restricted Stock Units · traded 5 February 2026 · filed 9 February 2026
- exercised options over 6,031 shares of Formfactor (a derivative holding)SEC Form 49 February 2026Restricted Stock Units · traded 6 February 2026 · filed 9 February 2026
- exercised options over 3,644 shares of FormfactorSEC Form 49 February 2026Common Stock · traded 5 February 2026 · filed 9 February 2026
- had shares withheld for tax on 2,095 shares of FormfactorSEC Form 49 February 2026Common Stock · traded 5 February 2026 · filed 9 February 2026
- exercised options over 6,031 shares of FormfactorSEC Form 49 February 2026Common Stock · traded 6 February 2026 · filed 9 February 2026
- had shares withheld for tax on 3,357 shares of FormfactorSEC Form 49 February 2026Common Stock · traded 6 February 2026 · filed 9 February 2026
- ▼ sold on the open market 6,976 shares of FormfactorSEC Form 415 January 2026Common Stock · traded 15 January 2026 · filed 15 January 2026
- ▼ sold on the open market 6,112 shares of FormfactorSEC Form 415 January 2026Common Stock · traded 15 January 2026 · filed 15 January 2026
- ▼ sold on the open market 6,976 shares of FormfactorSEC Form 415 January 2026Common Stock · traded 15 January 2026 · filed 15 January 2026
- ▼ sold on the open market 6,112 shares of FormfactorSEC Form 415 January 2026Common Stock · traded 15 January 2026 · filed 15 January 2026
- ▼ sold on the open market 39,606 shares of FormfactorSEC Form 46 January 2026Common Stock · traded 6 January 2026 · filed 6 January 2026
- ▼ sold on the open market 39,606 shares of FormfactorSEC Form 46 January 2026Common Stock · traded 6 January 2026 · filed 6 January 2026
- ▼ sold on the open market 5,606 shares of FormfactorSEC Form 417 December 2025Common Stock · traded 17 December 2025 · filed 17 December 2025
- ▼ sold on the open market 2,063 shares of FormfactorSEC Form 417 December 2025Common Stock · traded 17 December 2025 · filed 17 December 2025
- was granted 2,256 shares of Benchmark ElectronicsSEC Form 416 December 2025Common Stock · traded 12 December 2025 · filed 16 December 2025
- ▼ sold on the open market 4,739 shares of FormfactorSEC Form 419 November 2025Common Stock · traded 19 November 2025 · filed 19 November 2025
- ▼ sold on the open market 3,664 shares of FormfactorSEC Form 419 November 2025Common Stock · traded 19 November 2025 · filed 19 November 2025
- exercised options over 5,908 shares of Formfactor (a derivative holding)SEC Form 410 November 2025Restricted Stock Units · traded 7 November 2025 · filed 10 November 2025
- exercised options over 5,908 shares of FormfactorSEC Form 410 November 2025Common Stock · traded 7 November 2025 · filed 10 November 2025
- had shares withheld for tax on 3,282 shares of FormfactorSEC Form 410 November 2025Common Stock · traded 7 November 2025 · filed 10 November 2025
- exercised options over 3,644 shares of Formfactor (a derivative holding)SEC Form 47 November 2025Restricted Stock Units · traded 5 November 2025 · filed 7 November 2025
- exercised options over 6,031 shares of Formfactor (a derivative holding)SEC Form 47 November 2025Restricted Stock Units · traded 6 November 2025 · filed 7 November 2025
- exercised options over 3,644 shares of FormfactorSEC Form 47 November 2025Common Stock · traded 5 November 2025 · filed 7 November 2025
- had shares withheld for tax on 2,025 shares of FormfactorSEC Form 47 November 2025Common Stock · traded 5 November 2025 · filed 7 November 2025
- exercised options over 6,031 shares of FormfactorSEC Form 47 November 2025Common Stock · traded 6 November 2025 · filed 7 November 2025
- had shares withheld for tax on 3,351 shares of FormfactorSEC Form 47 November 2025Common Stock · traded 6 November 2025 · filed 7 November 2025
- gave away 5,000 shares of FormfactorSEC Form 44 November 2025Common Stock · traded 3 November 2025 · filed 4 November 2025
- was granted 72,372 shares of Formfactor (a derivative holding)SEC Form 48 August 2025Restricted Stock Units · traded 6 August 2025 · filed 8 August 2025
- exercised options over 5,908 shares of Formfactor (a derivative holding)SEC Form 48 August 2025Restricted Stock Units · traded 7 August 2025 · filed 8 August 2025
- exercised options over 5,908 shares of FormfactorSEC Form 48 August 2025Common Stock · traded 7 August 2025 · filed 8 August 2025
- had shares withheld for tax on 3,282 shares of FormfactorSEC Form 48 August 2025Common Stock · traded 7 August 2025 · filed 8 August 2025
- exercised options over 3,644 shares of Formfactor (a derivative holding)SEC Form 46 August 2025Restricted Stock Units · traded 5 August 2025 · filed 6 August 2025
- exercised options over 3,644 shares of FormfactorSEC Form 46 August 2025Common Stock · traded 5 August 2025 · filed 6 August 2025
- had shares withheld for tax on 2,025 shares of FormfactorSEC Form 46 August 2025Common Stock · traded 5 August 2025 · filed 6 August 2025
- was granted 49,935 shares of Formfactor (a derivative holding)SEC Form 44 August 2025Performance-based Restricted Stock Units · traded 1 August 2025 · filed 4 August 2025
- exercised options over 49,935 shares of Formfactor (a derivative holding)SEC Form 44 August 2025Performance-based Restricted Stock Units · traded 1 August 2025 · filed 4 August 2025
- exercised options over 14,426 shares of Formfactor (a derivative holding)SEC Form 44 August 2025Restricted Stock Units · traded 1 August 2025 · filed 4 August 2025
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.