Wednesday, October 28, 2026
Data from SEC filings, checked daily
Public filings, plainly told
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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

Timeline: news and trades

Company filings (8-K), insider trades, notices of planned sales (Form 144) and fund moves in the past year, newest first.

  1. Oct 14, 2026Insider saleCEO Mike Slessor sold $1.4 million under a 10b5-1 plan
  2. Oct 14, 2026Planned saleMIKE SLESSOR (officer, director) filed notice to sell about $1.4 million around Oct 14, 2026
  3. Sep 16, 2026Insider saleCEO Mike Slessor sold $1.8 million under a 10b5-1 plan
  4. Sep 16, 2026Planned saleMIKE SLESSOR (officer, director) filed notice to sell about $1.8 million around Sep 16, 2026
  5. Sep 3, 2026Insider saleDirector Kelley Steven-Waiss sold $201,810
  6. Aug 14, 2026Insider saleCEO Mike Slessor sold $2.1 million under a 10b5-1 plan
  7. Jun 30, 2026FundBridgewater Associates added 224% in Q2 2026 (13F filed Aug 14, 2026)
  8. Jun 30, 2026FundRenaissance Technologies opened a position in Q2 2026 (13F filed Aug 13, 2026)

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.

Recent FORM insider trades
FiledTradedInsiderRoleTypeSharesPrice ($)ValueHoldingFiling
Oct 14Oct 14Mike SlessorCEOCEO▼ SELL10b5-111,098125.20$1.39M−2.4%Form 4 ↗
Sep 17Sep 16Mike SlessorCEOCEO▼ SELL10b5-117,510104.73$1.83M−3.6%Form 4 ↗
Sep 4Sep 3Kelley Steven-WaissDirectorDirector▼ SELL2,10096.10$202K−7.9%Form 4 ↗
Aug 17Aug 14Mike SlessorCEOCEO▼ SELL10b5-116,002130.95$2.10M−3.2%Form 4 ↗
Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings

Insiders who traded in the past year

InsiderRoleBuysBoughtSellsSoldLatest
Mike SlessorCEO0$03$5.32MOct 14, 2026
Kelley Steven-WaissDirector0$01$202KSep 4, 2026

Buybacks and executive pay

FORMFACTOR INC spent $26.2 million buying back its own shares in 2025.

From the company's XBRL data filed with the SEC. "Actually paid" is the SEC's pay-versus-performance measure, which counts changes in the value of stock awards. "Value of $100 invested" is the company's cumulative shareholder return as reported, usually measured from five years earlier. See all buybacks and CEO pay across companies.

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.

FundQuarterSharesValue% of portfolioChange
Renaissance TechnologiesQ2 2026295,568$47.3M0.07%▲ New
Bridgewater AssociatesQ2 2026162,592$26.0M0.11%▲ +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 →