FormFactor, Inc. (FORM) Insider Trading

Over the last 3 months, FORM insiders made 0 open-market buys and 21 sales, a net sale of -$5.3M (SEC Form 4). Over the last 6 months, 281 institutions increased and 293 reduced their position (13F).

Insider Activity

Sentiment
0/100
Buys (3m)
0
Sells (3m)
21
Net (3m)
-$5.3M
Insider trades by month Buys Sells
Mar
Apr
May
Jun
Jul
Aug
Context3-month price -12%Institutions accumulating (13F)
DateInsiderTypeSharesPrice
Aug 17, 2026SLESSOR MIKEdirector, officer: CEOSell686$133.33
Aug 17, 2026SLESSOR MIKEdirector, officer: CEOSell1,125$131.65
Aug 17, 2026SLESSOR MIKEdirector, officer: CEOSell5,535$132.50
Aug 17, 2026SLESSOR MIKEdirector, officer: CEOSell2,892$129.55
Aug 17, 2026SLESSOR MIKEdirector, officer: CEOSell3,282$130.54
Aug 17, 2026SLESSOR MIKEdirector, officer: CEOSell2,482$128.72
Aug 10, 2026SLESSOR MIKEdirector, officer: CEOGrant141,792—
Aug 10, 2026SLESSOR MIKEdirector, officer: CEOTax78,908$117.39
Aug 10, 2026McKinnis Aric Brendanofficer: CFO, SVP Global FinanceGrant6,924—
Aug 10, 2026SLESSOR MIKEdirector, officer: CEOTax3,288$117.39
Aug 10, 2026SLESSOR MIKEdirector, officer: CEOOption141,792—
Aug 10, 2026SLESSOR MIKEdirector, officer: CEOGrant27,696—
Aug 10, 2026SLESSOR MIKEdirector, officer: CEOOption5,908—
Aug 7, 2026McKinnis Aric Brendanofficer: CFO, SVP Global FinanceTax130$114.44
Aug 7, 2026McKinnis Aric Brendanofficer: CFO, SVP Global FinanceOption1,099—
Aug 7, 2026McKinnis Aric Brendanofficer: CFO, SVP Global FinanceTax274$115.21
Aug 7, 2026SLESSOR MIKEdirector, officer: CEOOption6,031—
Aug 7, 2026SLESSOR MIKEdirector, officer: CEOTax2,028$114.44
Aug 7, 2026SLESSOR MIKEdirector, officer: CEOOption3,644—
Aug 7, 2026SLESSOR MIKEdirector, officer: CEOTax3,357$115.21
Aug 7, 2026McKinnis Aric Brendanofficer: CFO, SVP Global FinanceOption521—
Jul 16, 2026SLESSOR MIKEdirector, officer: CEOSell868$121.30
Jul 16, 2026SLESSOR MIKEdirector, officer: CEOSell1,650$117.39
Jul 16, 2026SLESSOR MIKEdirector, officer: CEOSell706$118.21
Jul 16, 2026SLESSOR MIKEdirector, officer: CEOSell1,041$116.56
Jul 16, 2026SLESSOR MIKEdirector, officer: CEOSell300$120.58
Jul 16, 2026SLESSOR MIKEdirector, officer: CEOSell170$119.08
Jun 16, 2026St Dennis ThomasdirectorSell2,800$151.49
Jun 11, 2026SLESSOR MIKEdirector, officer: CEOSell2,500$122.63
Jun 11, 2026SLESSOR MIKEdirector, officer: CEOSell400$119.46

Source: FORM SEC Form 4 filings, latest Aug 17, 2026. For informational purposes only — not investment advice.

Institutional activity (13F)

How institutions changed their FORM positions over the last 6 months (SEC Form 13F).

Increased
281
New positions
265
Reduced
293
Sold out
45
Largest moves
InstitutionActionSharesFiled
BLACKROCK, INC.Increased12.2MMay 13, 2026
BlackRock, Inc.Reduced10.5MAug 7, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCNew Position5.9MMay 8, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCReduced5.2MAug 13, 2026
EARNEST PARTNERS LLCReduced4.9MMay 15, 2026
EARNEST PARTNERS LLCReduced3.8MAug 13, 2026
VANGUARD CAPITAL MANAGEMENT LLCIncreased3.5MAug 13, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position3.5MMay 15, 2026
STATE STREET CORPIncreased2.9MMay 15, 2026
STATE STREET CORPReduced2.6MAug 7, 2026
BANK OF AMERICA CORP /DE/Reduced2.5MMay 18, 2026
POLAR CAPITAL HOLDINGS PLCNew Position2.3MMay 15, 2026
ALLIANCEBERNSTEIN L.P.Increased2.2MMay 15, 2026
GEODE CAPITAL MANAGEMENT, LLCIncreased2.2MMay 15, 2026
Polar Capital Holdings PlcReduced2.1MAug 14, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.

← Back to FORM overview (price, financials, earnings)