FORM
FORMFACTOR INC · Technology · Market cap $7.7B
Insiders sold $5.5M net in the last 90 days ·2 sellers, 0 buyers· 3 of 4 sales under Rule 10b5-1 plans· latest Form 4 filed Oct 15, 2026
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$23.4M
reported sales (SEC code S)
Unique Insiders
9
in the rolling window
Latest filing
Oct 15, 2026
SLESSOR MIKE
FORMFACTOR INC (FORM) has 54 SEC Form 4 filings (129 transaction rows) in the rolling window, disclosed by 9 distinct insiders. Most recent filing: Oct 15, 2026.
Inside the rolling window, 9 insiders at FORMFACTOR INC reported no open-market purchases and 32 open-market sales totaling $23.4M. The most active filer is CEO SLESSOR MIKE with 13 filings. Insiders have net sold $12.1M over the trailing 6 months. The most recent open-market filing is a sale of 11,098 shares by CEO SLESSOR MIKE, dated Oct 14, 2026, worth $1.4M.
- Industry:Semiconductors
- CEO:Michael D. Slessor
- Employees:2,153
- HQ:Livermore, CA, US
- IPO:2003-06-12
| Source | |||||||
|---|---|---|---|---|---|---|---|
| CEO | Sale | 11,098 | $1.4M | Oct 15 | -13.1% | SEC ↗ | |
| CEO | Sale | 17,510 | $1.8M | Sep 17 | -11.7% | SEC ↗ | |
STEVEN-WAISS KELLEYFirst in 4 months | Director | Sale | 2,100 | $202K | Sep 4 | -5.2% | SEC ↗ |
| CEO | Sale | 16,002 | $2.1M | Aug 17 | -28.7% | SEC ↗ | |
| CEO | Sale | 4,735 | $560K | Jul 16 | — | SEC ↗ | |
| Director | Sale | 2,800 | $424K | Jun 17 | — | SEC ↗ | |
| CEO | Sale | 11,890 | $1.4M | Jun 11 | — | SEC ↗ | |
Rhodes SheriFirst in 4 months | Director | Sale | 6,328 | $794K | Jun 4 | — | SEC ↗ |
Obregon-Jimenez RebecaFirst in 3 months | Director | Sale | 3,828 | $484K | May 22 | — | SEC ↗ |
| Director | Sale | 3,250 | $410K | May 21 | — | SEC ↗ | |
| Director | Sale | 1,000 | $116K | May 21 | — | SEC ↗ | |
| Director | Sale | 4,009 | $516K | May 15 | — | SEC ↗ | |
STEVEN-WAISS KELLEYFirst in 3 months | Director | Sale | 5,400 | $678K | May 15 | — | SEC ↗ |
| CEO | Sale | 9,438 | $1.2M | May 14 | — | SEC ↗ | |
| CEO | Sale | 11,294 | $1.4M | Apr 15 | — | SEC ↗ | |
| CEO | Sale | 10,227 | $973K | Mar 18 | — | SEC ↗ | |
McKinnis Aric BrendanFirst filing | CFO, SVP Global Finance | Sale | 3,462 | $313K | Mar 6 | — | SEC ↗ |
| Director | Sale | 2,300 | $230K | Feb 25 | — | SEC ↗ | |
| CEO | Sale | 8,664 | $816K | Feb 18 | — | SEC ↗ | |
BREWER KEVIN JFirst filing | Director | Sale | 3,000 | $289K | Feb 12 | — | SEC ↗ |
| Director | Sale | 2,200 | $206K | Feb 11 | — | SEC ↗ | |
| Director | Sale | 7,431 | $697K | Feb 11 | — | SEC ↗ | |
Rhodes SheriFirst filing | Director | Sale | 7,634 | $707K | Feb 11 | — | SEC ↗ |
| Director | Sale | 2,000 | $178K | Feb 10 | — | SEC ↗ | |
WHITE BRIAN CFirst filing | Director | Sale | 5,500 | $500K | Feb 10 | — | SEC ↗ |
Frequently asked questions
How many SEC Form 4 insider filings does FORM have?
FORMFACTOR INC (FORM) has 54 SEC Form 4 filings (129 transaction rows) in the rolling 365-day window, disclosed by 9 distinct insiders. Most recent filing: Oct 15, 2026.
When was the most recent SEC Form 4 filing for FORM?
The most recent Form 4 filing for FORM on Tracefour is dated Oct 15, 2026.
Who is the most active insider at FORM?
The most active SEC Form 4 filer at FORM in the rolling window is CEO SLESSOR MIKE, with 13 filings.
What is the net insider flow at FORM over the last 6 months?
Over the trailing 180 days, insiders at FORM have net sold $12.1M based on SEC Form 4 disclosures.
What is the total insider buy and sell value at FORM in the current window?
Inside the rolling window, insiders at FORM bought $0 and sold $23.4M based on SEC Form 4 filings.
Can I get alerts for FORM insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at FORMFACTOR INC (FORM). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
FORMFACTOR INC is in the Technology sector.