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FORM Insider Trading & Form 4 Activity

FORMFACTOR INC
Last filing: Oct 14, 2026·9 days ago
NEUTRAL · LAST 90 DAYS
0%
buyers
$0
0 buys
$202K
1 sell
-$202K
net selling
1
insider
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Net flow — last 12 months

Monthly net of insider buys minus sells. Green months indicate net buying; red months indicate net selling.

Most active insiders

Ranked by total transaction value over the last 90 days.

INSIDERBOUGHTSOLDNET
Slessor Mike
CEO
—
$5.3M
-$5.3M
Steven-Waiss Kelley
Insider
—
$202K
-$202K
Mckinnis Aric Brendan
CFO, SVP Global Finance
—
—
$0

Recent transactions

Every Form 4 transaction for FORM, newest first.

SELL10b5-1
Slessor Mike · CEO
Tx Oct 14·Filed Oct 14·EDGAR ↗
1,200 sh @ $125.92
$151K
SELL10b5-1
Slessor Mike · CEO
Tx Oct 14·Filed Oct 14·EDGAR ↗
7,703 sh @ $125.36
$966K
SELL10b5-1
Slessor Mike · CEO
Tx Oct 14·Filed Oct 14·EDGAR ↗
2,195 sh @ $124.23
$273K
SELL10b5-1
Slessor Mike · CEO
Tx Sep 16·Filed Sep 17·EDGAR ↗
1,000 sh @ $105.80
$106K
SELL10b5-1
Slessor Mike · CEO
Tx Sep 16·Filed Sep 17·EDGAR ↗
7,773 sh @ $105.12
$817K
SELL10b5-1
Slessor Mike · CEO
Tx Sep 16·Filed Sep 17·EDGAR ↗
8,737 sh @ $104.26
$911K
SELL
Steven-Waiss Kelley · Insider
Tx Sep 3·Filed Sep 4·EDGAR ↗
2,100 sh @ $96.10
$202K
SELL10b5-1
Slessor Mike · CEO
Tx Aug 14·Filed Aug 17·EDGAR ↗
2,892 sh @ $129.55
$375K
SELL10b5-1
Slessor Mike · CEO
Tx Aug 14·Filed Aug 17·EDGAR ↗
686 sh @ $133.33
$91K
SELL10b5-1
Slessor Mike · CEO
Tx Aug 14·Filed Aug 17·EDGAR ↗
5,535 sh @ $132.50
$733K
SELL10b5-1
Slessor Mike · CEO
Tx Aug 14·Filed Aug 17·EDGAR ↗
1,125 sh @ $131.65
$148K
SELL10b5-1
Slessor Mike · CEO
Tx Aug 14·Filed Aug 17·EDGAR ↗
3,282 sh @ $130.54
$428K
SELL10b5-1
Slessor Mike · CEO
Tx Aug 14·Filed Aug 17·EDGAR ↗
2,482 sh @ $128.72
$319K
TAX
Slessor Mike · CEO
Tx Aug 7·Filed Aug 10·EDGAR ↗
78,908 sh @ $117.39
$9.3M
TAX
Slessor Mike · CEO
Tx Aug 7·Filed Aug 10·EDGAR ↗
3,288 sh @ $117.39
$386K
EXERCISE
Slessor Mike · CEO
Tx Aug 7·Filed Aug 10·EDGAR ↗
5,908 sh
—
EXERCISE
Slessor Mike · CEO
Tx Aug 7·Filed Aug 10·EDGAR ↗
141,792 sh
—
EXERCISE
Mckinnis Aric Brendan · CFO, SVP Global Finance
Tx Aug 6·Filed Aug 7·EDGAR ↗
1,099 sh
—
TAX
Slessor Mike · CEO
Tx Aug 6·Filed Aug 7·EDGAR ↗
3,357 sh @ $115.21
$387K
EXERCISE
Slessor Mike · CEO
Tx Aug 6·Filed Aug 7·EDGAR ↗
6,031 sh
—
TAX
Mckinnis Aric Brendan · CFO, SVP Global Finance
Tx Aug 6·Filed Aug 7·EDGAR ↗
274 sh @ $115.21
$32K
TAX
Slessor Mike · CEO
Tx Aug 5·Filed Aug 7·EDGAR ↗
2,028 sh @ $114.44
$232K
TAX
Mckinnis Aric Brendan · CFO, SVP Global Finance
Tx Aug 5·Filed Aug 7·EDGAR ↗
130 sh @ $114.44
$15K
EXERCISE
Mckinnis Aric Brendan · CFO, SVP Global Finance
Tx Aug 5·Filed Aug 7·EDGAR ↗
521 sh
—
EXERCISE
Slessor Mike · CEO
Tx Aug 5·Filed Aug 7·EDGAR ↗
3,644 sh
—
SELL10b5-1
Slessor Mike · CEO
Tx Jul 15·Filed Jul 16·EDGAR ↗
1,650 sh @ $117.39
$194K
SELL10b5-1
Slessor Mike · CEO
Tx Jul 15·Filed Jul 16·EDGAR ↗
868 sh @ $121.30
$105K
SELL10b5-1
Slessor Mike · CEO
Tx Jul 15·Filed Jul 16·EDGAR ↗
300 sh @ $120.58
$36K
SELL10b5-1
Slessor Mike · CEO
Tx Jul 15·Filed Jul 16·EDGAR ↗
170 sh @ $119.08
$20K
SELL10b5-1
Slessor Mike · CEO
Tx Jul 15·Filed Jul 16·EDGAR ↗
706 sh @ $118.21
$83K
SELL10b5-1
Slessor Mike · CEO
Tx Jul 15·Filed Jul 16·EDGAR ↗
1,041 sh @ $116.56
$121K
GIFT
St Dennis Thomas · Insider
Tx Jun 16·Filed Jun 16·EDGAR ↗
740 sh
—
SELL
St Dennis Thomas · Insider
Tx Jun 15·Filed Jun 16·EDGAR ↗
2,800 sh @ $151.49
$424K
SELL10b5-1
Slessor Mike · CEO
Tx Jun 10·Filed Jun 11·EDGAR ↗
975 sh @ $121.00
$118K
SELL10b5-1
Slessor Mike · CEO
Tx Jun 10·Filed Jun 11·EDGAR ↗
1,399 sh @ $117.70
$165K
SELL10b5-1
Slessor Mike · CEO
Tx Jun 10·Filed Jun 11·EDGAR ↗
767 sh @ $119.00
$91K
SELL10b5-1
Slessor Mike · CEO
Tx Jun 10·Filed Jun 11·EDGAR ↗
400 sh @ $119.46
$48K
SELL10b5-1
Slessor Mike · CEO
Tx Jun 10·Filed Jun 11·EDGAR ↗
4,220 sh @ $121.72
$514K
SELL10b5-1
Slessor Mike · CEO
Tx Jun 10·Filed Jun 11·EDGAR ↗
2,500 sh @ $122.63
$307K
SELL10b5-1
Slessor Mike · CEO
Tx Jun 10·Filed Jun 11·EDGAR ↗
1,629 sh @ $123.37
$201K
EXERCISE
Mckinnis Aric Brendan · CFO, SVP Global Finance
Tx Jun 2·Filed Jun 4·EDGAR ↗
773 sh
—
SELL
Rhodes Sheri · Insider
Tx Jun 2·Filed Jun 4·EDGAR ↗
6,328 sh @ $125.40
$794K
TAX
Mckinnis Aric Brendan · CFO, SVP Global Finance
Tx Jun 2·Filed Jun 4·EDGAR ↗
193 sh @ $125.11
$24K
SELL
Obregon-Jimenez Rebeca · Insider
Tx May 21·Filed May 22·EDGAR ↗
3,828 sh @ $126.47
$484K
SELL
White Brian C · Insider
Tx May 20·Filed May 21·EDGAR ↗
3,250 sh @ $126.00
$410K
SELL
St Dennis Thomas · Insider
Tx May 19·Filed May 21·EDGAR ↗
1,000 sh @ $115.84
$116K
AWARD
White Brian C · Insider
Tx May 15·Filed May 19·EDGAR ↗
1,347 sh
—
AWARD
Rhodes Sheri · Insider
Tx May 15·Filed May 19·EDGAR ↗
1,347 sh
—
AWARD
St Dennis Thomas · Insider
Tx May 15·Filed May 19·EDGAR ↗
1,347 sh
—
AWARD
Obregon-Jimenez Rebeca · Insider
Tx May 15·Filed May 19·EDGAR ↗
1,347 sh
—

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About FORM insider trading data

Form 4 is the SEC filing required when an officer, director, or 10% owner of a public company buys or sells the company's stock. By law, these filings must be submitted within two business days of the trade. Tracenotes pulls every Form 4 filing for FORM from EDGAR, parses it, and surfaces the activity on this page.

What insider buying tells you. Open-market purchases by insiders are widely studied as a meaningful signal. Unlike stock awards (which are compensation, not conviction), an executive spending their own money to buy shares of the company they run is a vote of confidence. Studies have found insider-buying clusters — three or more insiders buying within a short window — outperform the broader market over the following year.

What insider selling tells you. Selling is noisier. Many sales are pre-scheduled under SEC Rule 10b5-1 plans, which let insiders sell on a fixed schedule regardless of company news. We label these "10b5-1" so you can see them. Discretionary sales — sales not tied to a plan — are more meaningful, especially when multiple insiders sell in quick succession.

Tracenotes methodology. We scan EDGAR daily for new Form 4 filings, parse them into individual transactions, and detect clusters when three or more distinct insiders buy or sell within a 14-day window. The data on this page covers the last 12 months. For deeper analysis, Tracenotes also runs language-change detection on 10-K and 10-Q filings — that's our core product.

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Frequently asked questions

What is a Form 4 filing?

Form 4 is the SEC disclosure required when a company insider — an officer, director, or 10% owner — buys or sells the company's stock. By law these filings must be submitted within two business days of the trade.

Is insider buying FORM always bullish?

Open-market purchases by insiders are widely viewed as a bullish signal because executives are spending their own money. Stock awards and option exercises are part of compensation and don't carry the same weight, which is why we treat them separately on this page.

What is a 10b5-1 trade?

A trade made under SEC Rule 10b5-1, which lets insiders pre-schedule sales weeks or months in advance. These sales execute on a fixed plan regardless of company news, so they're a weaker signal than discretionary sales. We label them with a "10b5-1" tag.

What is an insider cluster?

A cluster is when three or more distinct insiders buy or sell within a 14-day window. Clusters are studied as stronger signals than single trades because multiple people independently reach the same view. We surface active clusters on FORMFACTOR INC (FORM) when they form.

Where does FORM insider trading data come from?

Every Form 4 filing for FORM is sourced directly from SEC EDGAR. Tracenotes scans EDGAR daily, parses each Form 4 into individual transactions, and updates this page within hours of new filings.

Nothing on this page constitutes investment advice. Form 4 data is sourced from SEC EDGAR and provided for research purposes only.

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