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FORMFACTOR INC

FORM Net selling
CIK 0001039399 #988 in the set updated 17 Sep 2026
Bought (120 mo)
$17.90K
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$72.85M
$15.59M on a plan · $24.94M straight out of an exercise
Sold at will
$32.32M
97 of 229 sales
Net
−$72.83M
−$32.31M against sales at will

By person

16 insiders · 231 transactions
70.0×

Michael D. Slessor holds 70.0 times base salary in stock. $46.53M of shares against $664.62K in salary for 2025.

Salary from the company's own proxy. The shares are what Michael D. Slessor last reported holding, valued at $96.10, the price Common Stock was last bought or sold at on the open market here, on 3 Sep 2026.

Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
SLESSOR MIKE
CEO
—
$33.06M (111) scheduled
−$33.06M
484,204
0.6198%
$46.53M
+125.4%
St Dennis Thomas
Director
—
$13.14M (32) scheduled
−$13.14M
74,333
0.0952%
$7.14M
−65.5%
MAIER LOTHAR
Director
—
$5.49M (1)
−$5.49M
6,770
0.0087%
$650.60K
−87.2%
Shahar Shai
CFO, SVP Global Finance
—
$3.91M (15)
−$3.91M
55,968
0.0716%
$5.38M
—
STEVEN-WAISS KELLEY
Director
—
$2.56M (16)
−$2.56M
24,426
0.0313%
$2.35M
+125.5%
Rhodes Sheri
Director
—
$2.43M (5)
−$2.43M
5,375
0.0069%
$516.54K
+11.2%
DeLateur Richard
Director
—
$2.32M (7) scheduled
−$2.32M
25,000
0.0320%
$2.40M
+13.6%
ROGAS EDWARD JR
Director
—
$2.21M (7)
−$2.21M
61,098
0.0782%
$5.87M
−31.4%
LUDWIG MICHAEL M
SR VP, CFO
—
$1.83M (9) scheduled
−$1.83M
240,387
0.3077%
$23.10M
+14.7%
Obregon-Jimenez Rebeca
Director
—
$1.79M (7)
−$1.79M
13,126
0.0168%
$1.26M
+30.2%
WHITE BRIAN C
Director
—
$1.33M (4)
−$1.33M
8,653
0.0111%
$831.55K
+91.4%
Titinger Jorge
Director
—
$977.93K (3)
−$977.93K
14,836
0.0190%
$1.43M
+207.0%
ZELLNER MICHAEL W
Director
—
$720.62K (4)
−$720.62K
41,875
0.0536%
$4.02M
−12.8%
LINK RAYMOND A
Director
$17.90K (1)
$481.76K (6)
−$463.86K
66,225
0.0848%
$6.36M
+94.2%
McKinnis Aric Brendan
CFO, SVP Global Finance
—
$313.03K (1)
−$313.03K
14,152
0.0181%
$1.36M
+24.7%
BREWER KEVIN J
Director
—
$288.60K (1)
−$288.60K
8,105
0.0104%
$778.89K
—

Individual transactions

97
Insider
Date
Role
Action
Shares
Price
Amount
STEVEN-WAISS KELLEY
3 Sep 2026
Director
Sell
2,100
$96.10
$201.81K
St Dennis Thomas
15 Jun 2026
Director
Sell
2,800
$151.49
$424.17K
Rhodes Sheri
2 Jun 2026
Director
Sell
6,328
$125.40
$793.53K
Obregon-Jimenez Rebeca
21 May 2026
Director
Sell
3,828
$126.48
$484.15K
WHITE BRIAN C
20 May 2026
Director
Sell
3,250
$126.00
$409.50K
St Dennis Thomas
19 May 2026
Director
Sell
1,000
$115.84
$115.84K
STEVEN-WAISS KELLEY
15 May 2026
Director
Sell
5,400
$125.60
$678.24K
Titinger Jorge
13 May 2026
Director
Sell
4,009
$128.79
$516.30K
McKinnis Aric Brendan
5 Mar 2026
CFO, SVP Global Finance
Sell
3,462
$90.42
$313.03K
WHITE BRIAN C
24 Feb 2026
Director
Sell
2,300
$100.01
$230.02K
BREWER KEVIN J
11 Feb 2026
Director
Sell
3,000
$96.20
$288.60K
STEVEN-WAISS KELLEY
10 Feb 2026
Director
Sell
2,200
$93.70
$206.14K
Rhodes Sheri
10 Feb 2026
Director
Sell
7,634
$92.61
$706.97K
St Dennis Thomas
10 Feb 2026
Director
Sell
1,830
$94.24
$172.46K
St Dennis Thomas
10 Feb 2026
Director
Sell
5,601
$93.71
$524.89K
Titinger Jorge
9 Feb 2026
Director
Sell
2,000
$88.84
$177.68K
WHITE BRIAN C
9 Feb 2026
Director
Sell
5,500
$90.95
$500.23K
Obregon-Jimenez Rebeca
9 Feb 2026
Director
Sell
2,770
$95.82
$265.42K
STEVEN-WAISS KELLEY
2 Dec 2025
Director
Sell
2,700
$55.97
$151.11K
St Dennis Thomas
17 Nov 2025
Director
Sell
2,000
$49.85
$99.69K
STEVEN-WAISS KELLEY
12 Sep 2025
Director
Sell
3,600
$30.43
$109.53K
Obregon-Jimenez Rebeca
13 Aug 2025
Director
Sell
4,000
$29.55
$118.20K
St Dennis Thomas
29 May 2025
Director
Sell
3,000
$31.24
$93.72K
STEVEN-WAISS KELLEY
5 Mar 2025
Director
Sell
3,870
$31.02
$120.05K
St Dennis Thomas
5 Nov 2024
Director
Sell
3,100
$39.11
$121.23K
Titinger Jorge
6 Aug 2024
Director
Sell
6,770
$41.94
$283.95K
Obregon-Jimenez Rebeca
28 May 2024
Director
Sell
4,833
$57.59
$278.33K
WHITE BRIAN C
20 May 2024
Director
Sell
3,290
$57.00
$187.53K
MAIER LOTHAR
14 May 2024
Director
Sell
99,723
$55.08
$5.49M
St Dennis Thomas
10 May 2024
Director
Sell
2,000
$56.30
$112.60K
Rhodes Sheri
7 May 2024
Director
Sell
13,319
$56.02
$746.14K
STEVEN-WAISS KELLEY
6 May 2024
Director
Sell
4,800
$54.24
$260.33K
Shahar Shai
6 May 2024
CFO, SVP Global Finance
Sell
5,148
$54.38
$279.94K
Shahar Shai
6 May 2024
CFO, SVP Global Finance
Sell
680
$54.60
$37.13K
Shahar Shai
4 Mar 2024
CFO, SVP Global Finance
Sell
10,000
$44.51
$445.12K
Shahar Shai
12 Feb 2024
CFO, SVP Global Finance
Sell
10,000
$42.12
$421.25K
Obregon-Jimenez Rebeca
1 Dec 2023
Director
Sell
8,490
$37.51
$318.46K
Shahar Shai
20 Nov 2023
CFO, SVP Global Finance
Sell
16,618
$39.49
$656.19K
St Dennis Thomas
14 Nov 2023
Director
Sell
3,792
$38.24
$144.99K
Shahar Shai
10 Nov 2023
CFO, SVP Global Finance
Sell
10,000
$37.53
$375.32K
Shahar Shai
10 Nov 2023
CFO, SVP Global Finance
Sell
3,374
$37.53
$126.63K
Shahar Shai
9 Nov 2023
CFO, SVP Global Finance
Sell
601
$35.90
$21.58K
Shahar Shai
9 Nov 2023
CFO, SVP Global Finance
Sell
9,892
$34.96
$345.81K
Shahar Shai
9 Nov 2023
CFO, SVP Global Finance
Sell
493
$35.15
$17.33K
Shahar Shai
6 Mar 2023
CFO, SVP Global Finance
Sell
4,759
$29.68
$141.23K
St Dennis Thomas
16 Feb 2023
Director
Sell
13,000
$32.31
$419.97K
SLESSOR MIKE
13 Feb 2023
CEO
Sell
10,000
$31.97
$319.67K
LINK RAYMOND A
17 May 2022
Director
Sell
1,600
$40.23
$64.37K
STEVEN-WAISS KELLEY
9 Feb 2022
Director
Sell
6,000
$42.62
$255.70K
St Dennis Thomas
8 Feb 2022
Director
Sell
6,000
$41.63
$249.77K
Obregon-Jimenez Rebeca
8 Feb 2022
Director
Sell
2,400
$41.61
$99.87K
STEVEN-WAISS KELLEY
24 Nov 2021
Director
Sell
3,000
$43.12
$129.36K
Shahar Shai
9 Nov 2021
CFO, SVP Global Finance
Sell
3,374
$43.78
$147.73K
SLESSOR MIKE
5 Nov 2021
CEO
Sell
25,000
$44.60
$1.12M
SLESSOR MIKE
26 May 2021
CEO
Sell
15,010
$34.68
$520.51K
LINK RAYMOND A
18 May 2021
Director
Sell
3,500
$34.49
$120.71K
Rhodes Sheri
18 May 2021
Director
Sell
3,549
$34.50
$122.45K
SLESSOR MIKE
24 Feb 2021
CEO
Sell
15,000
$46.95
$704.25K
ROGAS EDWARD JR
19 Feb 2021
Director
Sell
8,597
$48.46
$416.61K
ROGAS EDWARD JR
19 Feb 2021
Director
Sell
3,403
$49.06
$166.95K
ROGAS EDWARD JR
19 Feb 2021
Director
Sell
6,000
$48.99
$293.94K
SLESSOR MIKE
19 Nov 2020
CEO
Sell
4,602
$38.76
$178.39K
SLESSOR MIKE
19 Nov 2020
CEO
Sell
9,510
$38.73
$368.32K
Obregon-Jimenez Rebeca
13 Nov 2020
Director
Sell
5,992
$37.59
$225.25K
ROGAS EDWARD JR
5 Nov 2020
Director
Sell
6,000
$33.45
$200.68K
ROGAS EDWARD JR
4 Nov 2020
Director
Sell
9,000
$32.53
$292.74K
Rhodes Sheri
9 Jul 2020
Director
Sell
2,010
$31.90
$64.12K
STEVEN-WAISS KELLEY
15 Jun 2020
Director
Sell
4,000
$26.55
$106.19K
SLESSOR MIKE
2 Jun 2020
CEO
Sell
16,000
$25.12
$401.95K
LINK RAYMOND A
19 May 2020
Director
Sell
4,000
$24.33
$97.34K
Shahar Shai
12 May 2020
CFO, SVP Global Finance
Sell
17,216
$24.63
$423.95K
St Dennis Thomas
11 May 2020
Director
Sell
6,000
$24.78
$148.69K
Shahar Shai
11 May 2020
CFO, SVP Global Finance
Sell
5,111
$24.87
$127.09K
SLESSOR MIKE
2 Mar 2020
CEO
Sell
15,856
$22.16
$351.39K
St Dennis Thomas
10 Feb 2020
Director
Sell
10,000
$25.94
$259.38K
SLESSOR MIKE
2 Dec 2019
CEO
Sell
14,976
$22.82
$341.70K
St Dennis Thomas
20 Nov 2019
Director
Sell indirect
5,000
$22.68
$113.41K
ROGAS EDWARD JR
14 Oct 2019
Director
Sell indirect
38,000
$19.85
$754.46K
STEVEN-WAISS KELLEY
11 Sep 2019
Director
Sell
1,200
$18.19
$21.83K
ZELLNER MICHAEL W
4 Sep 2019
Director
Sell
18,000
$17.43
$313.75K
St Dennis Thomas
20 Aug 2019
Director
Sell
3,000
$17.26
$51.78K
STEVEN-WAISS KELLEY
11 Jun 2019
Director
Sell
1,200
$15.67
$18.81K
DeLateur Richard
11 Jun 2019
Director
Sell
6,000
$15.50
$93.03K
LINK RAYMOND A
21 May 2019
Director
Sell
4,000
$15.58
$62.32K
STEVEN-WAISS KELLEY
21 May 2019
Director
Sell
4,500
$15.58
$70.10K
STEVEN-WAISS KELLEY
13 Mar 2019
Director
Sell
1,200
$15.42
$18.50K
St Dennis Thomas
20 Feb 2019
Director
Sell
8,000
$15.99
$127.90K
STEVEN-WAISS KELLEY
12 Feb 2019
Director
Sell
7,000
$15.50
$108.52K
ZELLNER MICHAEL W
7 Sep 2018
Director
Sell
11,000
$13.49
$148.40K
DeLateur Richard
14 Aug 2018
Director
Sell
6,000
$14.07
$84.43K
LINK RAYMOND A
30 May 2018
Director
Sell
4,500
$13.35
$60.08K
STEVEN-WAISS KELLEY
14 May 2018
Director
Sell
8,000
$13.22
$105.77K
ZELLNER MICHAEL W
11 May 2018
Director
Sell
15,400
$13.09
$201.62K
LUDWIG MICHAEL M
13 Nov 2017
SR VP, CFO
Sell
16,845
$17.50
$294.82K
St Dennis Thomas
2 Jun 2017
Director
Sell
156,600
$14.63
$2.29M
LUDWIG MICHAEL M
27 Mar 2017
SR VP, CFO
Sell
10
$10.81
$108.10
DeLateur Richard
2 Mar 2017
Director
Sell
12,000
$11.08
$132.90K
Show all 231 transactions →

What was left out

Form 4 filings counted 338
Amendments (4/A) skipped 3
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 73
Sales straight out of an exercise 59
Sales at will 97
Transactions with no price 0
Shares from compensation/vesting 4,385,992
Sales filed before the plan box existed 53
History held since 2 Nov 2016