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NASDAQ · TECHNOLOGY · Holders

FormFactor Inc (FORM) Institutional Ownership & Insider Trading History

Recent insider purchases and sales for FORM from Form 4 filings. Institutional holdings surface here when ownership sources publish.

Section freshness

Price Jun 24, 4:00 PM EDT · Statements Mar 30, 8:00 PM EDT

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Price time means the latest available trade or regular-market close. Other times show when that section was checked or published.

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Ownership read

FORM insider sentiment: Net selling.

94 sales and 0 purchases appear in the recent Form 4 filings. Use the filters below to separate real buying and selling from option exercises, gifts, awards, and tax withholding.

Review insider tradesView institutions

Insider flow

FORM

Purchases—
Sales279.17K

Directional bars ignore awards, gifts, conversions, and tax withholding rows.

Top holder

—

Institutional data pending

Insider stance

Net selling

$19.86M sold / — bought

Latest filing

Jun 10, 2026

Most recent holder or insider filing date

Filings shown

120

0 holder / 120 insider

Holder rows
Pending
Market data source
Latest filing
Jun 10, 2026
Most recent holder or insider filing date
Increased / initiated
Pending
0 decreased
Insider rows
120
Market data source

Recent insider transactions

FormFactor Inc (FORM) Form 4 filings

Action codes are translated so open-market buys and sales are separate from awards, gifts, conversions, and tax withholding.

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
767
% company
<0.01%
Price
$119.00
Value
$91,273

Filed Jun 10, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
1.63K
% company
<0.01%
Price
$123.37
Value
$200,970

Filed Jun 10, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
2.50K
% company
<0.01%
Price
$122.63
Value
$306,575

Filed Jun 10, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
4.22K
% company
<0.01%
Price
$121.72
Value
$513,658

Filed Jun 10, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
975
% company
<0.01%
Price
$121.00
Value
$117,975

Filed Jun 10, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
1.40K
% company
<0.01%
Price
$117.70
Value
$164,662

Filed Jun 10, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
400
% company
<0.01%
Price
$119.46
Value
$47,784

Filed Jun 10, 2026

RHODES, SHERI

Director

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
6.33K
% company
<0.01%
Price
$125.40
Value
$793,531

Filed Jun 2, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
773
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Jun 2, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
773
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Jun 2, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
193
% company
<0.01%
Price
$125.11
Value
$24,146

Filed Jun 2, 2026

OBREGON-JIMENEZ, REBECA

Director

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
3.83K
% company
<0.01%
Price
$126.48
Value
$484,146

Filed May 21, 2026

WHITE, BRIAN C

Director

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
3.25K
% company
<0.01%
Price
$126.00
Value
$409,500

Filed May 20, 2026

ST, DENNIS THOMAS

Director

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
1.00K
% company
<0.01%
Price
$115.84
Value
$115,840

Filed May 19, 2026

STEVEN-WAISS, KELLEY

Director

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
1.35K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed May 15, 2026

RHODES, SHERI

Director

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
1.35K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed May 15, 2026

OBREGON-JIMENEZ, REBECA

Director

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
1.35K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed May 15, 2026

ST, DENNIS THOMAS

Director

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
1.35K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed May 15, 2026

TITINGER, JORGE

Director

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
1.35K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed May 15, 2026

WHITE, BRIAN C

Director

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
1.35K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed May 15, 2026

STEVEN-WAISS, KELLEY

Director

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
5.40K
% company
<0.01%
Price
$125.60
Value
$678,241

Filed May 15, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
1.30K
% company
<0.01%
Price
$123.72
Value
$160,836

Filed May 13, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
702
% company
<0.01%
Price
$136.15
Value
$95,577

Filed May 13, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
66
% company
<0.01%
Price
$135.73
Value
$8,958

Filed May 13, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
200
% company
<0.01%
Price
$132.63
Value
$26,526

Filed May 13, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
200
% company
<0.01%
Price
$130.57
Value
$26,114

Filed May 13, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
700
% company
<0.01%
Price
$129.33
Value
$90,531

Filed May 13, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
700
% company
<0.01%
Price
$128.52
Value
$89,964

Filed May 13, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
100
% company
<0.01%
Price
$127.47
Value
$12,747

Filed May 13, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
398
% company
<0.01%
Price
$126.59
Value
$50,383

Filed May 13, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
1.39K
% company
<0.01%
Price
$125.58
Value
$174,305

Filed May 13, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
2.98K
% company
<0.01%
Price
$124.71
Value
$372,135

Filed May 13, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
700
% company
<0.01%
Price
$122.84
Value
$85,988

Filed May 13, 2026

TITINGER, JORGE

Director

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
4.01K
% company
<0.01%
Price
$128.79
Value
$516,299

Filed May 13, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
5.91K
% company
<0.01%
Price
Not reported
Value
Not reported

Filed May 7, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
3.29K
% company
<0.01%
Price
$144.68
Value
$475,708

Filed May 7, 2026

SLESSOR, MIKE

Director, CEO

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
5.91K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed May 7, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
274
% company
<0.01%
Price
$149.12
Value
$40,859

Filed May 6, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
1.10K
% company
<0.01%
Price
Not reported
Value
Not reported

Filed May 6, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
1.10K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed May 6, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
6.03K
% company
<0.01%
Price
Not reported
Value
Not reported

Filed May 6, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
3.36K
% company
<0.01%
Price
$149.12
Value
$500,596

Filed May 6, 2026

SLESSOR, MIKE

Director, CEO

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
6.03K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed May 6, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
3.64K
% company
<0.01%
Price
Not reported
Value
Not reported

Filed May 5, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
2.03K
% company
<0.01%
Price
$145.00
Value
$294,060

Filed May 5, 2026

SLESSOR, MIKE

Director, CEO

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
3.64K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed May 5, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
521
% company
<0.01%
Price
Not reported
Value
Not reported

Filed May 5, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
130
% company
<0.01%
Price
$145.00
Value
$18,850

Filed May 5, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
521
% company
<0.01%
Price
No cash value
Value
No cash value

Filed May 5, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
2.37K
% company
<0.01%
Price
$127.65
Value
$302,403

Filed Apr 15, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
900
% company
<0.01%
Price
$126.58
Value
$113,922

Filed Apr 15, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
5.43K
% company
<0.01%
Price
$128.56
Value
$698,338

Filed Apr 15, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
767
% company
<0.01%
Price
$129.22
Value
$99,112

Filed Apr 15, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
1.83K
% company
<0.01%
Price
$125.24
Value
$228,688

Filed Apr 15, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
1.90K
% company
<0.01%
Price
$94.10
Value
$178,790

Filed Mar 18, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
5.50K
% company
<0.01%
Price
$95.21
Value
$523,179

Filed Mar 18, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
2.83K
% company
<0.01%
Price
$95.73
Value
$271,107

Filed Mar 18, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
3.46K
% company
<0.01%
Price
$90.42
Value
$313,034

Filed Mar 5, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
193
% company
<0.01%
Price
$99.70
Value
$19,242

Filed Mar 2, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
773
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Mar 2, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
773
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Mar 2, 2026

WHITE, BRIAN C

Director

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
2.30K
% company
<0.01%
Price
$100.01
Value
$230,023

Filed Feb 24, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
4.93K
% company
<0.01%
Price
$93.97
Value
$463,648

Filed Feb 18, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
834
% company
<0.01%
Price
$92.85
Value
$77,437

Filed Feb 18, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
2.90K
% company
<0.01%
Price
$94.79
Value
$274,512

Filed Feb 18, 2026

BREWER, KEVIN J

Director

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
3.00K
% company
<0.01%
Price
$96.20
Value
$288,600

Filed Feb 11, 2026

RHODES, SHERI

Director

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
7.63K
% company
<0.01%
Price
$92.61
Value
$706,973

Filed Feb 10, 2026

ST, DENNIS THOMAS

Director

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
5.60K
% company
<0.01%
Price
$93.71
Value
$524,894

Filed Feb 10, 2026

STEVEN-WAISS, KELLEY

Director

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
2.20K
% company
<0.01%
Price
$93.70
Value
$206,139

Filed Feb 10, 2026

ST, DENNIS THOMAS

Director

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
1.83K
% company
<0.01%
Price
$94.24
Value
$172,460

Filed Feb 10, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
5.91K
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Feb 9, 2026

TITINGER, JORGE

Director

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
2.00K
% company
<0.01%
Price
$88.84
Value
$177,680

Filed Feb 9, 2026

WHITE, BRIAN C

Director

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
5.50K
% company
<0.01%
Price
$90.95
Value
$500,225

Filed Feb 9, 2026

OBREGON-JIMENEZ, REBECA

Director

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
2.77K
% company
<0.01%
Price
$95.82
Value
$265,422

Filed Feb 9, 2026

SLESSOR, MIKE

Director, CEO

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
5.91K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Feb 9, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
3.29K
% company
<0.01%
Price
$94.88
Value
$311,965

Filed Feb 9, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
3.36K
% company
<0.01%
Price
$90.29
Value
$303,104

Filed Feb 6, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
1.10K
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Feb 6, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
336
% company
<0.01%
Price
$90.29
Value
$30,337

Filed Feb 6, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
1.10K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Feb 6, 2026

SLESSOR, MIKE

Director, CEO

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
6.03K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Feb 6, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
6.03K
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Feb 6, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
521
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Feb 5, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
3.64K
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Feb 5, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
2.10K
% company
<0.01%
Price
$83.87
Value
$175,708

Filed Feb 5, 2026

SLESSOR, MIKE

Director, CEO

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
3.64K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Feb 5, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
521
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Feb 5, 2026

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
162
% company
<0.01%
Price
$83.87
Value
$13,587

Filed Feb 5, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
6.11K
% company
<0.01%
Price
$77.24
Value
$472,091

Filed Jan 15, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
6.98K
% company
<0.01%
Price
$76.43
Value
$533,176

Filed Jan 15, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
39.61K
% company
0.05%
Price
$65.00
Value
$2,574,390

Filed Jan 6, 2026

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
2.06K
% company
<0.01%
Price
$56.82
Value
$117,220

Filed Dec 17, 2025

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
5.61K
% company
<0.01%
Price
$56.19
Value
$315,001

Filed Dec 17, 2025

STEVEN-WAISS, KELLEY

Director

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
2.70K
% company
<0.01%
Price
$55.97
Value
$151,106

Filed Dec 2, 2025

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
773
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Dec 2, 2025

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
193
% company
<0.01%
Price
$56.04
Value
$10,816

Filed Dec 2, 2025

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
773
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Dec 2, 2025

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
4.74K
% company
<0.01%
Price
$49.65
Value
$235,291

Filed Nov 19, 2025

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
3.66K
% company
<0.01%
Price
$50.60
Value
$185,398

Filed Nov 19, 2025

ST, DENNIS THOMAS

Director

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
2.00K
% company
<0.01%
Price
$49.85
Value
$99,693

Filed Nov 17, 2025

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
3.28K
% company
<0.01%
Price
$52.25
Value
$171,485

Filed Nov 7, 2025

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
5.91K
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Nov 7, 2025

SLESSOR, MIKE

Director, CEO

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
5.91K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Nov 7, 2025

SLESSOR, MIKE

Director, CEO

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
6.03K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Nov 6, 2025

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
13.19K
% company
0.02%
Price
No cash value
Value
No cash value

Filed Nov 6, 2025

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
6.03K
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Nov 6, 2025

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
3.35K
% company
<0.01%
Price
$54.22
Value
$181,691

Filed Nov 6, 2025

SLESSOR, MIKE

Director, CEO

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
3.64K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Nov 5, 2025

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
2.02K
% company
<0.01%
Price
$55.36
Value
$112,104

Filed Nov 5, 2025

SLESSOR, MIKE

Director, CEO

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
3.64K
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Nov 5, 2025

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
521
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Nov 5, 2025

MCKINNIS, ARIC BRENDAN

CFO, SVP Global Finance

Sale to issuerDisposition to the company or issuer. It is directional selling, but not always an ordinary open-market sale.
Shares
130
% company
<0.01%
Price
$55.36
Value
$7,197

Filed Nov 5, 2025

Showing 112 of 120 matching Form 4 rows. Percent of company uses current shares outstanding when available.Load more insiders

Frequently asked

Common questions.

Who are the largest FORM shareholders?

FormFactor Inc (FORM) institutional holders are ranked by reported share count when ownership data publishes filing rows.

What is institutional ownership of FORM?

FormFactor Inc (FORM) institutional ownership appears when filing-based market data returns holder rows. TECHi does not fill unavailable ownership fields with placeholder shareholders.

Where can I see FormFactor Inc insider transactions?

FormFactor Inc (FORM) has 120 Form 4 insider transactions on file, most recently on Jun 10, 2026, separated into purchases, sales, option exercises, awards, gifts, and tax withholding so administrative transactions are distinguished from open-market trades.

Are FORM insiders buying or selling?

Recent FORM insider activity reads Net selling: 94 sales and 0 purchases. Awards, gifts, conversions, and tax withholding are listed separately because they do not carry the same signal as open-market trades.

Who is the most active FORM insider?

SLESSOR, MIKE is the most active FORM insider by absolute share movement, with 250,756 shares moving across the filing history. Review the action labels before treating that activity as buying or selling.