StockCIK 1039399
FORMFACTOR INC (FORM): Insider Trades and Fund Holdings
In the past 12 months, FORMFACTOR INC insiders reported 0 open-market purchases worth $0 and 4 sales worth $5.52M; 3 of the sales were reported as made under a 10b5-1 trading plan.
0Insider buys, 12 months
$0Bought by insiders, 12 months
$5.52MSold by insiders, 12 months
2Tracked funds holding
Recent insider trades
Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Oct 14, 2026.
| Filed | Insider | Type | Value |
|---|---|---|---|
| Oct 14 | Mike SlessorCEO | ▼ SELL10b5-1 | $1.39M |
| Sep 17 | Mike SlessorCEO | ▼ SELL10b5-1 | $1.83M |
| Sep 4 | Kelley Steven-WaissDirector | ▼ SELL | $202K |
| Aug 17 | Mike SlessorCEO | ▼ SELL10b5-1 | $2.10M |
Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings
Insiders who traded in the past year
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Mike Slessor | CEO | 0 | $0 | 3 | $5.32M |
| Kelley Steven-Waiss | Director | 0 | $0 | 1 | $202K |
Tracked funds that report FORM
From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.
| Fund | Shares | Value | Change |
|---|---|---|---|
| Renaissance Technologies | 295,568 | $47.3M | ▲ New |
| Bridgewater Associates | 162,592 | $26.0M | ▲ +223.8% |
Source: SEC Form 13F-HR filings, retrieved Oct 28, 2026. How we read filings
Reading these numbers
Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →