13F Pro

SEC Form 4 reporting owner

Slessor Mike

Slessor Mike has filed 70 Form 4 transactions reported between December 12, 2025 and September 16, 2026, as CEO of FORMFACTOR INC and a reporting owner of BENCHMARK ELECTRONICS INC.

Name as filed: SLESSOR MIKE

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$14.2M
47 lines
Companies
2
with Form 4 filings
Latest transaction
Sep 16, 2026
transaction date

Roles and reported holdings

  • FORMFORMFACTOR INC
    Dec 17, 2025 – Sep 16, 2026

    CEO

    Held directly466,694 sh as of Sep 16, 2026 · Form 4

    24 months: $14.2M sold

  • BHEBENCHMARK ELECTRONICS INC
    Dec 12, 2025 – May 27, 2026

    Reporting owner

    No common-stock holding reported on a purchase, sale, gift or withholding line.

Transaction history

All 70 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Sep 16, 2026FORMCEOOpen-market saleCode S · direct1,000$106K@ $105.80Form 4
Sep 16, 2026FORMCEOOpen-market saleCode S · direct7,773$817K@ $105.12Form 4
Sep 16, 2026FORMCEOOpen-market saleCode S · direct8,737$911K@ $104.26Form 4
Aug 14, 2026FORMCEOOpen-market saleCode S · direct686$91K@ $133.33Form 4
Aug 14, 2026FORMCEOOpen-market saleCode S · direct5,535$733K@ $132.50Form 4
Aug 14, 2026FORMCEOOpen-market saleCode S · direct1,125$148K@ $131.65Form 4
Aug 14, 2026FORMCEOOpen-market saleCode S · direct3,282$428K@ $130.54Form 4
Aug 14, 2026FORMCEOOpen-market saleCode S · direct2,892$375K@ $129.55Form 4
Aug 14, 2026FORMCEOOpen-market saleCode S · direct2,482$319K@ $128.72Form 4
Aug 7, 2026FORMCEOShares withheld for tax or exercise priceCode F · direct3,288$386K@ $117.39Form 4
Aug 7, 2026FORMCEOOption exerciseCode M · direct5,908—Form 4
Aug 7, 2026FORMCEOShares withheld for tax or exercise priceCode F · direct78,908$9.3M@ $117.39Form 4
Aug 7, 2026FORMCEOOption exerciseCode M · direct141,792—Form 4
Aug 6, 2026FORMCEOGrant or awardCode A · direct27,696—Form 4
Aug 6, 2026FORMCEOShares withheld for tax or exercise priceCode F · direct3,357$387K@ $115.21Form 4
Aug 6, 2026FORMCEOOption exerciseCode M · direct6,031—Form 4
Aug 5, 2026FORMCEOShares withheld for tax or exercise priceCode F · direct2,028$232K@ $114.44Form 4
Aug 5, 2026FORMCEOOption exerciseCode M · direct3,644—Form 4
Jul 15, 2026FORMCEOOpen-market saleCode S · direct868$105K@ $121.30Form 4
Jul 15, 2026FORMCEOOpen-market saleCode S · direct300$36K@ $120.58Form 4
Jul 15, 2026FORMCEOOpen-market saleCode S · direct170$20K@ $119.08Form 4
Jul 15, 2026FORMCEOOpen-market saleCode S · direct706$83K@ $118.21Form 4
Jul 15, 2026FORMCEOOpen-market saleCode S · direct1,650$194K@ $117.39Form 4
Jul 15, 2026FORMCEOOpen-market saleCode S · direct1,041$121K@ $116.56Form 4
Jun 10, 2026FORMCEOOpen-market saleCode S · direct1,629$201K@ $123.37Form 4
Jun 10, 2026FORMCEOOpen-market saleCode S · direct2,500$307K@ $122.63Form 4
Jun 10, 2026FORMCEOOpen-market saleCode S · direct4,220$514K@ $121.72Form 4
Jun 10, 2026FORMCEOOpen-market saleCode S · direct975$118K@ $121.00Form 4
Jun 10, 2026FORMCEOOpen-market saleCode S · direct400$48K@ $119.46Form 4
Jun 10, 2026FORMCEOOpen-market saleCode S · direct767$91K@ $119.00Form 4
Jun 10, 2026FORMCEOOpen-market saleCode S · direct1,399$165K@ $117.70Form 4
May 27, 2026BHEGrant or awardCode A · direct2,093—Form 4
May 13, 2026FORMCEOOpen-market saleCode S · direct702$96K@ $136.15Form 4
May 13, 2026FORMCEOOpen-market saleCode S · direct66$9K@ $135.73Form 4
May 13, 2026FORMCEOOpen-market saleCode S · direct200$26K@ $130.57Form 4
May 13, 2026FORMCEOOpen-market saleCode S · direct100$13K@ $127.47Form 4
May 13, 2026FORMCEOOpen-market saleCode S · direct398$50K@ $126.59Form 4
May 13, 2026FORMCEOOpen-market saleCode S · direct1,388$174K@ $125.58Form 4
May 13, 2026FORMCEOOpen-market saleCode S · direct2,984$372K@ $124.71Form 4
May 13, 2026FORMCEOOpen-market saleCode S · direct1,300$161K@ $123.72Form 4
May 13, 2026FORMCEOOpen-market saleCode S · direct700$86K@ $122.84Form 4
May 7, 2026FORMCEOShares withheld for tax or exercise priceCode F · direct3,288$476K@ $144.68Form 4
May 7, 2026FORMCEOOption exerciseCode M · direct5,908—Form 4
May 6, 2026FORMCEOShares withheld for tax or exercise priceCode F · direct3,357$501K@ $149.12Form 4
May 6, 2026FORMCEOOption exerciseCode M · direct6,031—Form 4
May 5, 2026FORMCEOShares withheld for tax or exercise priceCode F · direct2,028$294K@ $145.00Form 4
May 5, 2026FORMCEOOption exerciseCode M · direct3,644—Form 4
Apr 15, 2026FORMCEOOpen-market saleCode S · direct767$99K@ $129.22Form 4
Apr 15, 2026FORMCEOOpen-market saleCode S · direct5,432$698K@ $128.56Form 4
Apr 15, 2026FORMCEOOpen-market saleCode S · direct2,369$302K@ $127.65Form 4
Apr 15, 2026FORMCEOOpen-market saleCode S · direct900$114K@ $126.58Form 4
Apr 15, 2026FORMCEOOpen-market saleCode S · direct1,826$229K@ $125.24Form 4
Mar 18, 2026FORMCEOOpen-market saleCode S · direct2,832$271K@ $95.73Form 4
Mar 18, 2026FORMCEOOpen-market saleCode S · direct5,495$523K@ $95.21Form 4
Mar 18, 2026FORMCEOOpen-market saleCode S · direct1,900$179K@ $94.10Form 4
Feb 18, 2026FORMCEOOpen-market saleCode S · direct2,896$275K@ $94.79Form 4
Feb 18, 2026FORMCEOOpen-market saleCode S · direct4,934$464K@ $93.97Form 4
Feb 18, 2026FORMCEOOpen-market saleCode S · direct834$77K@ $92.85Form 4
Feb 9, 2026FORMCEOShares withheld for tax or exercise priceCode F · direct3,288$312K@ $94.88Form 4
Feb 9, 2026FORMCEOOption exerciseCode M · direct5,908—Form 4
Feb 6, 2026FORMCEOShares withheld for tax or exercise priceCode F · direct3,357$303K@ $90.29Form 4
Feb 6, 2026FORMCEOOption exerciseCode M · direct6,031—Form 4
Feb 5, 2026FORMCEOShares withheld for tax or exercise priceCode F · direct2,095$176K@ $83.87Form 4
Feb 5, 2026FORMCEOOption exerciseCode M · direct3,644—Form 4
Jan 15, 2026FORMCEOOpen-market saleCode S · direct6,112$472K@ $77.24Form 4
Jan 15, 2026FORMCEOOpen-market saleCode S · direct6,976$533K@ $76.43Form 4
Jan 6, 2026FORMCEOOpen-market saleCode S · direct39,606$2.6M@ $65.00Form 4
Dec 17, 2025FORMCEOOpen-market saleCode S · direct2,063$117K@ $56.82Form 4
Dec 17, 2025FORMCEOOpen-market saleCode S · direct5,606$315K@ $56.19Form 4
Dec 12, 2025BHEGrant or awardCode A · direct2,256—Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.