United States Semiconductors & Semiconductor Equipment

FormFactor Inc (FORM)

Track

Over the past 90 days, FormFactor Inc. insiders have engaged in 52 transactions, resulting in a net negative value of approximately $3.42 million. All recorded activity consisted of sales, primarily driven by CEO Mike Slessor and Director Thomas St. Dennis. These transactions were largely planned sales, occurring despite the company's recent earnings report showing an EPS beat.
Ticker: FORM Exchange: NSM
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Top insiders
Trades
SLESSOR MIKE
CEO
6 sales — total 600,000 USD
Planned sale 15 Jul 2026
Value US$1,480,213.66 | Price 205.27 | Shares 61,145
Planned sale 15 Jul 2026
Value US$554,175.61 | Price 347.78 | Shares 63,382
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 119.08 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 118.21 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 117.39 | Shares 1,000
Planned sale 15 Jul 2026
Value US$100,000.00 | Price 116.56 | Shares 1,000
Proposed sale 15 Jul 2026
Value US$3,135,439.37 | Price 313.89 | Shares 74,730
Sale 15 Jun 2026
Value US$424,172.00 | Price 151.49 | Shares 2,800
Proposed sale 15 Jun 2026
Value US$424,172.00 | Price 151.49 | Shares 2,800
Planned sale 10 Jun 2026
Value US$200,969.73 | Price 123.37 | Shares 1,629
Planned sale 10 Jun 2026
Value US$200,969.73 | Price 123.37 | Shares 1,629
Planned sale 10 Jun 2026
Value US$306,575.00 | Price 122.63 | Shares 2,500
Planned sale 10 Jun 2026
Value US$306,575.00 | Price 122.63 | Shares 2,500
Planned sale 10 Jun 2026
Value US$513,658.40 | Price 121.72 | Shares 4,220
Planned sale 10 Jun 2026
Value US$513,658.40 | Price 121.72 | Shares 4,220
Planned sale 10 Jun 2026
Value US$117,975.00 | Price 121.00 | Shares 975
Planned sale 10 Jun 2026
Value US$117,975.00 | Price 121.00 | Shares 975
Planned sale 10 Jun 2026
Value US$47,784.00 | Price 119.46 | Shares 400
Planned sale 10 Jun 2026
Value US$47,784.00 | Price 119.46 | Shares 400
Planned sale 10 Jun 2026
Value US$91,273.00 | Price 119.00 | Shares 767
Planned sale 10 Jun 2026
Value US$91,273.00 | Price 119.00 | Shares 767
Planned sale 10 Jun 2026
Value US$200,969.73 | Price 123.37 | Shares 1,629
Planned sale 10 Jun 2026
Value US$306,575.00 | Price 122.63 | Shares 2,500
Planned sale 10 Jun 2026
Value US$513,658.40 | Price 121.72 | Shares 4,220
Planned sale 10 Jun 2026
Value US$117,975.00 | Price 121.00 | Shares 975
Planned sale 10 Jun 2026
Value US$47,784.00 | Price 119.46 | Shares 400
Planned sale 10 Jun 2026
Value US$91,273.00 | Price 119.00 | Shares 767
Planned sale 10 Jun 2026
Value US$164,662.30 | Price 117.70 | Shares 1,399
Proposed sale 10 Jun 2026
Value US$1,442,913.33 | Price 121.36 | Shares 11,890
Proposed sale 4 Jun 2026
Value US$326,112.00 | Price 129.00 | Shares 2,528
Sale 2 Jun 2026
Value US$793,531.20 | Price 125.40 | Shares 6,328
Proposed sale 2 Jun 2026
Value US$793,531.20 | Price 125.40 | Shares 6,328
Proposed sale 26 May 2026
Value US$547,410.00 | Price 136.85 | Shares 4,000
Sale 21 May 2026
Value US$484,146.30 | Price 126.48 | Shares 3,828
Proposed sale 21 May 2026
Value US$484,146.30 | Price 126.48 | Shares 3,828
Proposed sale 21 May 2026
Value US$484,146.30 | Price 126.48 | Shares 3,828
Sale 20 May 2026
Value US$409,500.00 | Price 126.00 | Shares 3,250
Proposed sale 20 May 2026
Value US$409,500.00 | Price 126.00 | Shares 3,250
Proposed sale 20 May 2026
Value US$195,981.68 | Price 124.28 | Shares 1,577
Sale 19 May 2026
Value US$115,839.90 | Price 115.84 | Shares 1,000
Proposed sale 19 May 2026
Value US$115,840.00 | Price 115.84 | Shares 1,000
Sale 15 May 2026
Value US$678,240.54 | Price 125.60 | Shares 5,400
Proposed sale 15 May 2026
Value US$678,240.54 | Price 125.60 | Shares 5,400
Sale 13 May 2026
Value US$516,299.06 | Price 128.79 | Shares 4,009
Proposed sale 13 May 2026
Value US$516,299.07 | Price 128.79 | Shares 4,009
Planned sale 13 May 2026
Value US$95,577.30 | Price 136.15 | Shares 702
Planned sale 13 May 2026
Value US$8,958.18 | Price 135.73 | Shares 66
Planned sale 13 May 2026
Value US$26,526.00 | Price 132.63 | Shares 200
Planned sale 13 May 2026
Value US$26,114.00 | Price 130.57 | Shares 200
Planned sale 13 May 2026
Value US$90,531.00 | Price 129.33 | Shares 700
Planned sale 13 May 2026
Value US$89,964.00 | Price 128.52 | Shares 700
Planned sale 13 May 2026
Value US$12,747.00 | Price 127.47 | Shares 100
Planned sale 13 May 2026
Value US$50,382.82 | Price 126.59 | Shares 398
Planned sale 13 May 2026
Value US$174,305.04 | Price 125.58 | Shares 1,388
Planned sale 13 May 2026
Value US$372,134.64 | Price 124.71 | Shares 2,984
Planned sale 13 May 2026
Value US$160,836.00 | Price 123.72 | Shares 1,300
Planned sale 13 May 2026
Value US$85,988.00 | Price 122.84 | Shares 700
Proposed sale 13 May 2026
Value US$1,194,065.56 | Price 126.52 | Shares 9,438
Planned sale 15 Apr 2026
Value US$99,111.74 | Price 129.22 | Shares 767
Planned sale 15 Apr 2026
Value US$698,337.92 | Price 128.56 | Shares 5,432
Planned sale 15 Apr 2026
Value US$302,402.85 | Price 127.65 | Shares 2,369
Planned sale 15 Apr 2026
Value US$113,922.00 | Price 126.58 | Shares 900
Planned sale 15 Apr 2026
Value US$228,688.24 | Price 125.24 | Shares 1,826
Proposed sale 15 Apr 2026
Value US$1,442,486.62 | Price 127.72 | Shares 11,294
Planned sale 18 Mar 2026
Value US$271,107.36 | Price 95.73 | Shares 2,832
Planned sale 18 Mar 2026
Value US$523,178.95 | Price 95.21 | Shares 5,495
Planned sale 18 Mar 2026
Value US$178,790.00 | Price 94.10 | Shares 1,900
Proposed sale 18 Mar 2026
Value US$973,087.80 | Price 95.15 | Shares 10,227
Planned sale 5 Mar 2026
Value US$313,034.04 | Price 90.42 | Shares 3,462
Proposed sale 5 Mar 2026
Value US$313,034.04 | Price 90.42 | Shares 3,462
Sale 24 Feb 2026
Value US$230,023.00 | Price 100.01 | Shares 2,300
Proposed sale 24 Feb 2026
Value US$230,023.00 | Price 100.01 | Shares 2,300
Planned sale 18 Feb 2026
Value US$274,511.84 | Price 94.79 | Shares 2,896
Planned sale 18 Feb 2026
Value US$463,647.98 | Price 93.97 | Shares 4,934
Planned sale 18 Feb 2026
Value US$77,436.90 | Price 92.85 | Shares 834
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-07-16 2026-07-15 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
61,145 -4.6%
205.27
US$1,480,214 		61,145 -4.6% 205.27 US$1,480,214
2026-07-16 2026-07-15 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
63,382 -12.1%
347.78
US$554,176 		63,382 -12.1% 347.78 US$554,176
2026-07-16 2026-07-15 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
46,055 -23.7%
36.23
US$3,912,214 		46,055 -23.7% 36.23 US$3,912,214
2026-07-16 2026-07-15 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
1,000 -0.2%
118.21
US$100,000 		1,000 -0.2% 118.21 US$100,000
2026-07-16 2026-07-15 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
1,000 -0.4%
117.39
US$100,000 		1,000 -0.4% 117.39 US$100,000
2026-07-16 2026-07-15 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
1,000 -0.2%
116.56
US$100,000 		1,000 -0.2% 116.56 US$100,000
2026-07-15 2026-07-15 PrS Proposed sale
3.3
MIKE SLESSOR

Officer; Director

Executive Director
1,000
118.31
US$100,000 		1,000 118.31 US$100,000
2026-06-16 2026-06-15 S Sale
2.7
St Dennis Thomas
Non-Executive Director
2,800 -8.8%
151.49
US$424,172 		2,800 -8.8% 151.49 US$424,172
2026-06-15 2026-06-15 PrS Proposed sale
2.7
THOMAS M. ST. DENNIS

Director

Non-Executive Director
2,800
151.49
US$424,172 		2,800 151.49 US$424,172
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
1,629 -0.4%
123.37
US$200,970 		1,629 -0.4% 123.37 US$200,970
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
1,629 -0.4%
123.37
US$200,970 		1,629 -0.4% 123.37 US$200,970
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
2,500 -0.6%
122.63
US$306,575 		2,500 -0.6% 122.63 US$306,575
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
2,500 -0.6%
122.63
US$306,575 		2,500 -0.6% 122.63 US$306,575
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
4,220 -1.0%
121.72
US$513,658 		4,220 -1.0% 121.72 US$513,658
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
4,220 -1.0%
121.72
US$513,658 		4,220 -1.0% 121.72 US$513,658
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
975 -0.2%
121.00
US$117,975 		975 -0.2% 121.00 US$117,975
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
975 -0.2%
121.00
US$117,975 		975 -0.2% 121.00 US$117,975
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
400 -0.1%
119.46
US$47,784 		400 -0.1% 119.46 US$47,784
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
400 -0.1%
119.46
US$47,784 		400 -0.1% 119.46 US$47,784
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
767 -0.2%
119.00
US$91,273 		767 -0.2% 119.00 US$91,273
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
767 -0.2%
119.00
US$91,273 		767 -0.2% 119.00 US$91,273
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
1,629 -0.4%
123.37
US$200,970 		1,629 -0.4% 123.37 US$200,970
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
2,500 -0.6%
122.63
US$306,575 		2,500 -0.6% 122.63 US$306,575
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
4,220 -1.0%
121.72
US$513,658 		4,220 -1.0% 121.72 US$513,658
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
975 -0.2%
121.00
US$117,975 		975 -0.2% 121.00 US$117,975
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
400 -0.1%
119.46
US$47,784 		400 -0.1% 119.46 US$47,784
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
767 -0.2%
119.00
US$91,273 		767 -0.2% 119.00 US$91,273
2026-06-11 2026-06-10 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
1,399 -0.3%
117.70
US$164,662 		1,399 -0.3% 117.70 US$164,662
2026-06-10 2026-06-10 PrS Proposed sale
3.3
MIKE SLESSOR

Officer; Director

Executive Director
11,890
121.36
US$1,442,913 		11,890 121.36 US$1,442,913
2026-06-04 2026-06-04 PrS Proposed sale
2.7
KEVIN J BREWER

Former Director

Non-Executive Director
2,528
129.00
US$326,112 		2,528 129.00 US$326,112
2026-06-04 2026-06-02 S Sale
2.6
Rhodes Sheri
Non-Executive Director
6,328 -54.1%
125.40
US$793,531 		6,328 -54.1% 125.40 US$793,531
2026-06-02 2026-06-02 PrS Proposed sale
2.6
SHERI LYNN RHODES

Director

Non-Executive Director
6,328
125.40
US$793,531 		6,328 125.40 US$793,531
2026-05-26 2026-05-26 PrS Proposed sale
2.7
KEVIN J BREWER

Former Director

Non-Executive Director
4,000
136.85
US$547,410 		4,000 136.85 US$547,410
2026-05-22 2026-05-21 S Sale
2.2
Obregon-Jimenez Rebeca
Non-Executive Director
3,828 -32.7%
126.48
US$484,146 		3,828 -32.7% 126.48 US$484,146
2026-05-21 2026-05-21 PrS Proposed sale
2.2
REBECA OBREGON-JIMENEZ

Director

Non-Executive Director
3,828
126.48
US$484,146 		3,828 126.48 US$484,146
2026-05-21 2026-05-21 PrS Proposed sale
2.2
REBECA OBREGON-JIMENEZ

Director

Non-Executive Director
3,828
126.48
US$484,146 		3,828 126.48 US$484,146
2026-05-21 2026-05-20 S Sale
2.8
WHITE BRIAN C
Non-Executive Director
3,250 -27.3%
126.00
US$409,500 		3,250 -27.3% 126.00 US$409,500
2026-05-20 2026-05-20 PrS Proposed sale
2.8
BRIAN C WHITE

Director

Non-Executive Director
3,250
126.00
US$409,500 		3,250 126.00 US$409,500
2026-05-20 2026-05-20 PrS Proposed sale
2.7
KEVIN J BREWER REVOCABLE TRUST

Board Member
1,577
124.28
US$195,982 		1,577 124.28 US$195,982
2026-05-21 2026-05-19 S Sale
2.7
St Dennis Thomas
Non-Executive Director
1,000 -3.0%
115.84
US$115,840 		1,000 -3.0% 115.84 US$115,840
2026-05-19 2026-05-19 PrS Proposed sale
2.7
Thomas M. St. Dennis

Director

Non-Executive Director
1,000
115.84
US$115,840 		1,000 115.84 US$115,840
2026-05-15 2026-05-15 S Sale
2.5
STEVEN-WAISS KELLEY
Non-Executive Director
5,400 -17.7%
125.60
US$678,241 		5,400 -17.7% 125.60 US$678,241
2026-05-15 2026-05-15 PrS Proposed sale
2.5
KELLEY LYNNE STEVEN-WAISS

Director

Non-Executive Director
5,400
125.60
US$678,241 		5,400 125.60 US$678,241
2026-05-15 2026-05-13 S Sale
3.1
Titinger Jorge
Non-Executive Director
4,009 -22.9%
128.79
US$516,299 		4,009 -22.9% 128.79 US$516,299
2026-05-14 2026-05-13 PrS Proposed sale
3.1
Titinger Jorge

Director

Non-Executive Director
4,009
128.79
US$516,299 		4,009 128.79 US$516,299
2026-05-14 2026-05-13 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
702 -0.2%
136.15
US$95,577 		702 -0.2% 136.15 US$95,577
2026-05-14 2026-05-13 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
66 -0.0%
135.73
US$8,958 		66 -0.0% 135.73 US$8,958
2026-05-14 2026-05-13 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
200 -0.0%
132.63
US$26,526 		200 -0.0% 132.63 US$26,526
2026-05-14 2026-05-13 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
200 -0.0%
130.57
US$26,114 		200 -0.0% 130.57 US$26,114
2026-05-14 2026-05-13 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
700 -0.2%
129.33
US$90,531 		700 -0.2% 129.33 US$90,531
2026-05-14 2026-05-13 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
700 -0.2%
128.52
US$89,964 		700 -0.2% 128.52 US$89,964
2026-05-14 2026-05-13 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
100 -0.0%
127.47
US$12,747 		100 -0.0% 127.47 US$12,747
2026-05-14 2026-05-13 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
398 -0.1%
126.59
US$50,383 		398 -0.1% 126.59 US$50,383
2026-05-14 2026-05-13 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
1,388 -0.3%
125.58
US$174,305 		1,388 -0.3% 125.58 US$174,305
2026-05-14 2026-05-13 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
2,984 -0.7%
124.71
US$372,135 		2,984 -0.7% 124.71 US$372,135
2026-05-14 2026-05-13 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
1,300 -0.3%
123.72
US$160,836 		1,300 -0.3% 123.72 US$160,836
2026-05-14 2026-05-13 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
700 -0.2%
122.84
US$85,988 		700 -0.2% 122.84 US$85,988
2026-05-13 2026-05-13 PrS Proposed sale
3.3
MIKE SLESSOR

Officer; Director

Executive Director
9,438
126.52
US$1,194,066 		9,438 126.52 US$1,194,066
2026-04-15 2026-04-15 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
767 -0.2%
129.22
US$99,112 		767 -0.2% 129.22 US$99,112
2026-04-15 2026-04-15 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
5,432 -1.2%
128.56
US$698,338 		5,432 -1.2% 128.56 US$698,338
2026-04-15 2026-04-15 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
2,369 -0.5%
127.65
US$302,403 		2,369 -0.5% 127.65 US$302,403
2026-04-15 2026-04-15 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
900 -0.2%
126.58
US$113,922 		900 -0.2% 126.58 US$113,922
2026-04-15 2026-04-15 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
1,826 -0.4%
125.24
US$228,688 		1,826 -0.4% 125.24 US$228,688
2026-04-15 2026-04-15 PrS Proposed sale
3.3
MIKE SLESSOR

Officer; Director

Executive Director
11,294
127.72
US$1,442,487 		11,294 127.72 US$1,442,487
2026-03-18 2026-03-18 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
2,832 -0.6%
95.73
US$271,107 		2,832 -0.6% 95.73 US$271,107
2026-03-18 2026-03-18 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
5,495 -1.2%
95.21
US$523,179 		5,495 -1.2% 95.21 US$523,179
2026-03-18 2026-03-18 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
1,900 -0.4%
94.10
US$178,790 		1,900 -0.4% 94.10 US$178,790
2026-03-18 2026-03-18 PrS Proposed sale
3.3
MIKE SLESSOR

Officer; Director

Executive Director
10,227
95.15
US$973,088 		10,227 95.15 US$973,088
2026-03-06 2026-03-05 PlS Planned sale
McKinnis Aric Brendan

CFO, SVP Global Finance

Officer
3,462 -23.7%
90.42
US$313,034 		3,462 -23.7% 90.42 US$313,034
2026-03-05 2026-03-05 PrS Proposed sale
ARIC MCKINNIS

Officer

Officer
3,462
90.42
US$313,034 		3,462 90.42 US$313,034
2026-02-25 2026-02-24 S Sale
2.8
WHITE BRIAN C
Non-Executive Director
2,300 -17.9%
100.01
US$230,023 		2,300 -17.9% 100.01 US$230,023
2026-02-24 2026-02-24 PrS Proposed sale
2.8
BRIAN C WHITE

Director

Non-Executive Director
2,300
100.01
US$230,023 		2,300 100.01 US$230,023
2026-02-18 2026-02-18 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
2,896 -0.6%
94.79
US$274,512 		2,896 -0.6% 94.79 US$274,512
2026-02-18 2026-02-18 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
4,934 -1.0%
93.97
US$463,648 		4,934 -1.0% 93.97 US$463,648
2026-02-18 2026-02-18 PlS Planned sale
3.3
SLESSOR MIKE

CEO

Executive Director
834 -0.2%
92.85
US$77,437 		834 -0.2% 92.85 US$77,437
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