Company · CIK 0001039399 · SIC 3674 — Semiconductors & Related Devices · Nasdaq
FORMFACTOR INC · FORM
Insider activity reported against this company. All insider holders · On EDGAR ↗
Reported at this company — common stock
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 16, 2026 SForm 4 → | Sep 17, 7:30 pm EDT | Mike SlessorCEO, Director | 17,510 | $104.73 | $1,833,817 | 466,694 | −3.62% | 10b5-1 |
| Sep 3, 2026 SForm 4 → | Sep 4, 4:51 pm EDT | Kelley Steven-WaissDirector | 2,100 | $96.10 | $201,810 | 24,426 | −7.92% | |
| Aug 14, 2026 SForm 4 → | Aug 17, 6:16 pm EDT | Mike SlessorCEO, Director | 16,002 | $130.95 | $2,095,532 | 484,204 | −3.20% | 10b5-1 |
| Aug 7, 2026 FMForm 4 → | Aug 10, 6:58 pm EDT | Mike SlessorCEO, Director | 229,896 | $117.39 | $9,648,988 | 500,206 | — | |
| Aug 5, 2026 FMForm 4 → | Aug 7, 5:56 pm EDT | Mike SlessorCEO, Director | 15,060 | $114.92 | $618,844 | 434,702 | — | |
| Aug 5, 2026 FMForm 4 → | Aug 7, 5:49 pm EDT | Aric Brendan McKinnisCFO, SVP Global Finance | 2,024 | $114.96 | $46,445 | 14,152 | — | |
| Jul 15, 2026 SForm 4 → | Jul 16, 5:30 pm EDT | Mike SlessorCEO, Director | 4,735 | $118.31 | $560,195 | 430,412 | −1.09% | 10b5-1 |
| Jun 16, 2026 GForm 4 → | Jun 16, 8:31 pm EDT | Thomas St DennisDirector | 740 | — | — | 28,333 | — | |
| Jun 15, 2026 SForm 4 → | Jun 16, 8:31 pm EDT | Thomas St DennisDirector | 2,800 | $151.49 | $424,172 | 29,073 | −8.78% | |
| Jun 10, 2026 SForm 4 → | Jun 11, 7:05 pm EDT | Mike SlessorCEO, Director | 11,890 | $121.35 | $1,442,897 | 435,147 | −2.66% | 10b5-1 |
| Jun 2, 2026 FMForm 4 → | Jun 4, 6:22 pm EDT | Aric Brendan McKinnisCFO, SVP Global Finance | 966 | $125.11 | $24,146 | 12,936 | — | |
| Jun 2, 2026 SForm 4 → | Jun 4, 6:20 pm EDT | Sheri RhodesDirector | 6,328 | $125.40 | $793,531 | 5,375 | −54.1% | |
| Mar 13, 2019 SForm 4 → | Mar 14, 1:09 pm EDT | Kelley Steven-WaissDirector | 1,200 | $15.42 | $18,504 | 10,800 | −10.0% | plan? |
| Feb 20, 2019 SForm 4 → | Feb 21, 5:02 pm EST | Thomas St DennisDirector | 8,000 | $15.99 | $127,895 | 45,000 | −15.1% | plan? |
| Feb 12, 2019 SForm 4 → | Feb 14, 7:45 pm EST | Kelley Steven-WaissDirector | 7,000 | $15.50 | $108,522 | 12,000 | −36.8% | plan? |
| Sep 7, 2018 SForm 4 → | Sep 11, 12:38 pm EDT | Michael W ZellnerDirector | 11,000 | $13.49 | $148,397 | 41,875 | −20.8% | plan? |
| Aug 14, 2018 SForm 4 → | Aug 16, 1:42 pm EDT | Richard DeLateurDirector | 6,000 | $14.07 | $84,430 | 13,000 | −31.6% | plan? |
| Aug 5, 2018 MForm 4 → | Aug 7, 5:48 pm EDT | Kelley Steven-WaissDirector | 9,000 | — | — | 19,000 | — | plan? |
| Jul 20, 2018 FMForm 4 → | Jul 24, 4:28 pm EDT | Mike SlessorCEO, Director | 26,690 | $14.00 | $130,998 | 322,312 | — | plan? |
| May 30, 2018 SForm 4 → | May 30, 7:41 pm EDT | Raymond A LinkDirector | 4,500 | $13.35 | $60,075 | 40,602 | −9.98% | plan? |
| May 28, 2018 FMForm 4 → | May 30, 7:33 pm EDT | Mike SlessorCEO, Director | 10,266 | $13.40 | $48,227 | 314,336 | — | plan? |
| May 26, 2018 MForm 4 → | May 30, 7:54 pm EDT | Kelley Steven-WaissDirector | 9,000 | — | — | 10,000 | — | plan? |
| May 26, 2018 MForm 4 → | May 30, 7:49 pm EDT | Lothar MaierDirector | 9,000 | — | — | 66,000 | — | plan? |
| May 26, 2018 MForm 4 → | May 30, 7:45 pm EDT | Richard DeLateurDirector | 9,000 | — | — | 19,000 | — | plan? |
| May 26, 2018 MForm 4 → | May 30, 7:43 pm EDT | Edward Rogas Jr.Director | 9,000 | — | — | 68,000 | — | plan? |
| May 26, 2018 MForm 4 → | May 30, 7:41 pm EDT | Raymond A LinkDirector | 9,000 | — | — | 45,102 | — | plan? |
| May 26, 2018 MForm 4 → | May 30, 7:39 pm EDT | Michael W ZellnerDirector | 9,000 | — | — | 52,875 | — | plan? |
| May 26, 2018 MForm 4 → | May 30, 7:35 pm EDT | Thomas St DennisDirector | 12,334 | — | — | 53,000 | — | plan? |
| May 14, 2018 SForm 4 → | May 15, 2:13 pm EDT | Kelley Steven-WaissDirector | 8,000 | $13.22 | $105,769 | 1,000 | −88.9% | plan? |
| May 11, 2018 SForm 4 → | May 15, 2:10 pm EDT | Michael W ZellnerDirector | 15,400 | $13.09 | $201,625 | 43,875 | −26.0% | plan? |
| May 2, 2018 FMForm 4 → | May 4, 2:47 pm EDT | Mike SlessorCEO, Director | 15,398 | $11.90 | $64,236 | 311,268 | — | plan? |
| Mar 6, 2018 SForm 4 → | Mar 7, 8:35 pm EST | Thomas St DennisDirector | 20,867 | $13.58 | $283,290 | 40,666 | −33.9% | plan? |
| Mar 6, 2018 MForm 4 → | Mar 7, 8:35 pm EST | Thomas St DennisDirector | 20,867 | $10.37 | $216,391 | 61,533 | — | plan? |
| Feb 20, 2018 SForm 4 → | Feb 22, 6:51 pm EST | Michael M LudwigSR VP, CFO | 45,000 | $13.05 | $587,280 | 240,387 | −15.8% | plan? |
| Feb 20, 2018 MForm 4 → | Feb 22, 6:51 pm EST | Michael M LudwigSR VP, CFO | 45,000 | $10.37 | $466,650 | 257,887 | — | plan? |
| Feb 15, 2018 SForm 4 → | Feb 16, 6:50 pm EST | Michael M LudwigSR VP, CFO | 30,000 | $12.73 | $381,870 | 240,387 | −11.1% | plan? |
| Feb 15, 2018 MForm 4 → | Feb 16, 6:50 pm EST | Michael M LudwigSR VP, CFO | 30,000 | $10.37 | $311,100 | 270,387 | — | plan? |
| Nov 13, 2017 SForm 4 → | Nov 14, 2:28 pm EST | Michael M LudwigSR VP, CFO | 16,845 | $17.50 | $294,818 | 241,132 | −6.53% | plan? |
| Nov 7, 2017 SForm 4 → | Nov 8, 3:00 pm EST | Richard DeLateurDirector | 15,000 | $17.69 | $265,370 | 10,000 | −60.0% | plan? |
| Nov 7, 2017 MForm 4 → | Nov 8, 3:00 pm EST | Richard DeLateurDirector | 6,000 | $9.70 | $58,200 | 25,000 | — | plan? |
| Sep 1, 2017 SForm 4 → | Sep 5, 6:37 pm EDT | Michael W ZellnerDirector | 3,725 | $15.26 | $56,842 | 59,275 | −5.91% | plan? |
| Sep 1, 2017 MForm 4 → | Sep 5, 6:37 pm EDT | Michael W ZellnerDirector | 6,000 | $9.31 | $55,860 | 63,000 | — | plan? |
| Aug 23, 2017 SForm 4 → | Aug 24, 6:40 pm EDT | Michael M LudwigSR VP, CFO | 10,000 | $14.07 | $140,696 | 257,977 | −3.73% | plan? |
| Aug 23, 2017 MForm 4 → | Aug 24, 6:40 pm EDT | Michael M LudwigSR VP, CFO | 10,000 | $10.30 | $103,000 | 267,977 | — | plan? |
| Aug 21, 2017 SForm 4 → | Aug 22, 6:59 pm EDT | Michael M LudwigSR VP, CFO | 30,000 | $14.21 | $426,310 | 257,977 | −10.4% | plan? |
| Aug 19, 2017 FMForm 4 → | Aug 22, 6:59 pm EDT | Michael M LudwigSR VP, CFO | 44,203 | $10.82 | $377,424 | 277,977 | — | plan? |
| Jun 14, 2017 SForm 4 → | Jun 15, 4:53 pm EDT | Thomas St DennisDirector | 400 | $13.93 | $5,570 | 40,666 | −0.97% | plan? |
| Jun 14, 2017 MForm 4 → | Jun 15, 4:53 pm EDT | Thomas St DennisDirector | 400 | $10.37 | $4,148 | 41,066 | — | plan? |
| Jun 5, 2017 MForm 4 → | Jun 6, 5:32 pm EDT | Thomas St DennisDirector | 128,733 | $10.37 | $1,334,961 | 169,399 | — | plan? |
| Jun 2, 2017 SForm 4 → | Jun 6, 5:32 pm EDT | Thomas St DennisDirector | 285,333 | $14.61 | $4,167,997 | 40,666 | −87.5% | plan? |
| May 28, 2017 MForm 4 → | May 31, 7:19 pm EDT | Thomas St DennisDirector | 3,333 | — | — | 197,266 | — | plan? |
| May 28, 2017 FMForm 4 → | May 31, 7:17 pm EDT | Mike SlessorCEO, Director | 10,439 | $14.40 | $54,317 | 306,666 | — | plan? |
| May 28, 2017 FMForm 4 → | May 31, 7:16 pm EDT | Michael M LudwigSR VP, CFO | 15,218 | $14.40 | $75,139 | 253,514 | — | plan? |
| May 20, 2017 MForm 4 → | May 23, 6:12 pm EDT | Edward Rogas Jr.Director | 9,000 | — | — | 59,000 | — | plan? |
| May 20, 2017 MForm 4 → | May 23, 6:06 pm EDT | Lothar MaierDirector | 9,000 | — | — | 57,000 | — | plan? |
| May 20, 2017 AForm 4 → | May 23, 6:02 pm EDT | Thomas St DennisDirector | 9,000 | — | — | 193,933 | — | plan? |
| May 20, 2017 MForm 4 → | May 23, 4:19 pm EDT | Michael W ZellnerDirector | 9,000 | — | — | 57,000 | — | plan? |
| May 20, 2017 MForm 4 → | May 23, 4:18 pm EDT | Kelley Steven-WaissDirector | 9,000 | — | — | 9,000 | — | plan? |
| May 20, 2017 MForm 4 → | May 23, 4:17 pm EDT | Richard DeLateurDirector | 9,000 | — | — | 19,000 | — | plan? |
| May 16, 2017 SForm 4 → | May 18, 6:31 pm EDT | Richard DeLateurDirector | 45,262 | $14.08 | $637,167 | 10,000 | −81.9% | plan? |
| May 16, 2017 MForm 4 → | May 18, 6:31 pm EDT | Richard DeLateurDirector | 45,262 | $13.60 | $615,563 | 55,262 | — | plan? |
| May 15, 2017 SForm 4 → | May 17, 8:04 pm EDT | Edward Rogas Jr.Director | 6,000 | $13.90 | $83,420 | 50,000 | −10.7% | plan? |
| May 15, 2017 MForm 4 → | May 17, 8:04 pm EDT | Edward Rogas Jr.Director | 6,000 | $8.91 | $53,460 | 56,000 | — | plan? |
| May 11, 2017 SForm 4 → | May 15, 8:29 pm EDT | Thomas St DennisDirector | 13,962 | $13.55 | $189,200 | 184,933 | −7.02% | plan? |
| May 11, 2017 MForm 4 → | May 15, 8:29 pm EDT | Thomas St DennisDirector | 13,962 | $7.52 | $104,994 | 198,895 | — | plan? |
| May 9, 2017 SForm 4 → | May 9, 7:00 pm EDT | Thomas St DennisDirector | 62,088 | $13.77 | $854,852 | 184,933 | −25.1% | plan? |
| May 8, 2017 SForm 4 → | May 10, 6:57 pm EDT | Richard DeLateurDirector | 80,000 | $13.80 | $1,103,704 | 10,000 | −88.9% | plan? |
| May 8, 2017 MForm 4 → | May 10, 6:57 pm EDT | Richard DeLateurDirector | 80,000 | $10.30 | $824,000 | 90,000 | — | plan? |
| May 5, 2017 MForm 4 → | May 9, 7:00 pm EDT | Thomas St DennisDirector | 82,088 | $7.52 | $466,902 | 247,021 | — | plan? |
| May 5, 2017 FMForm 4 → | May 9, 6:32 pm EDT | Mike SlessorCEO, Director | 28,707 | $14.25 | $147,815 | 303,771 | — | plan? |
| May 5, 2017 FMForm 4 → | May 9, 6:31 pm EDT | Michael M LudwigSR VP, CFO | 20,637 | $14.25 | $80,327 | 248,732 | — | plan? |
| May 1, 2017 FMForm 4 → | May 3, 5:32 pm EDT | Michael M LudwigSR VP, CFO | 63,729 | $11.75 | $204,203 | 239,369 | — | plan? |
| May 1, 2017 FMForm 4 → | May 3, 5:31 pm EDT | Mike SlessorCEO, Director | 80,167 | $11.72 | $339,514 | 295,810 | — | plan? |
| Mar 2, 2017 SForm 4 → | Mar 3, 7:01 pm EST | Richard DeLateurDirector | 12,000 | $11.08 | $132,900 | 10,000 | −54.5% | plan? |
| Feb 22, 2017 SForm 4 → | Feb 24, 7:38 pm EST | Thomas St DennisDirector | 20,297 | $11.68 | $237,072 | 164,933 | −11.0% | plan? |
| Feb 22, 2017 MForm 4 → | Feb 24, 7:38 pm EST | Thomas St DennisDirector | 20,297 | $7.52 | $152,633 | 167,633 | — | plan? |
| Feb 16, 2017 SForm 4 → | Feb 21, 5:52 pm EST | Thomas St DennisDirector | 196,682 | $11.83 | $2,326,816 | 164,933 | −54.4% | plan? |
| Feb 16, 2017 MForm 4 → | Feb 21, 5:52 pm EST | Thomas St DennisDirector | 196,682 | $7.52 | $1,479,049 | 172,301 | — | plan? |
| Feb 13, 2017 SForm 4 → | Feb 15, 5:53 pm EST | Thomas St DennisDirector | 156,971 | $12.07 | $1,894,549 | 164,933 | −48.8% | plan? |
| Feb 13, 2017 MForm 4 → | Feb 15, 5:53 pm EST | Thomas St DennisDirector | 156,971 | $7.52 | $1,180,422 | 223,103 | — | plan? |
| Nov 1, 2016 PForm 4 → | Nov 2, 6:06 pm EDT | Raymond A LinkDirector | 2,000 | $8.95 | $17,900 | 36,102 | +5.86% | plan? |
| Aug 22, 2016 SForm 4 → | Aug 23, 7:55 pm EDT | Richard DeLateurDirector | 10,000 | $10.74 | $107,375 | 22,000 | −31.3% | plan? |
| Aug 10, 2016 PForm 4 → | Aug 11, 8:43 pm EDT | Raymond A LinkDirector | 2,000 | $10.02 | $20,036 | 34,102 | +6.23% | plan? |
| Aug 5, 2016 SForm 4 → | Aug 9, 12:55 pm EDT | Thomas St DennisDirector | 23,120 | $10.51 | $242,896 | 164,933 | −12.3% | plan? |
| Jun 2, 2016 SForm 4 → | Jun 2, 7:13 pm EDT | Michael M LudwigSR VP, CFO | 3,692 | $7.33 | $27,055 | 210,398 | −1.72% | plan? |
| May 31, 2016 SForm 4 → | Jun 2, 7:14 pm EDT | Mike SlessorCEO, Director | 3,401 | $7.33 | $24,923 | 273,577 | −1.23% | plan? |
| May 31, 2016 MForm 4 → | Jun 2, 7:14 pm EDT | Mike SlessorCEO, Director | 6,666 | — | — | 276,978 | — | plan? |
| May 31, 2016 MForm 4 → | Jun 2, 7:13 pm EDT | Michael M LudwigSR VP, CFO | 10,000 | — | — | 214,090 | — | plan? |
| May 31, 2016 MForm 4 → | Jun 2, 7:09 pm EDT | Thomas St DennisDirector | 3,333 | — | — | 188,053 | — | plan? |
| May 6, 2016 SForm 4 → | May 9, 7:08 pm EDT | Mike SlessorCEO, Director | 12,697 | $6.82 | $86,620 | 270,312 | −4.49% | plan? |
| May 6, 2016 SForm 4 → | May 9, 7:05 pm EDT | Michael M LudwigSR VP, CFO | 11,423 | $6.81 | $77,788 | 204,090 | −5.30% | plan? |
| May 5, 2016 MForm 4 → | May 9, 7:12 pm EDT | Thomas St DennisDirector | 40,000 | — | — | 184,720 | — | plan? |
| May 5, 2016 MForm 4 → | May 9, 7:08 pm EDT | Mike SlessorCEO, Director | 33,333 | — | — | 276,002 | — | plan? |
| May 5, 2016 MForm 4 → | May 9, 7:05 pm EDT | Michael M LudwigSR VP, CFO | 30,000 | — | — | 209,780 | — | plan? |
| May 3, 2016 SForm 4 → | May 3, 7:20 pm EDT | Mike SlessorCEO, Director | 32,857 | $7.14 | $234,543 | 249,676 | −11.6% | plan? |
| May 3, 2016 SForm 4 → | May 3, 7:13 pm EDT | Michael M LudwigSR VP, CFO | 24,524 | $7.14 | $175,062 | 185,513 | −11.7% | plan? |
| May 2, 2016 MForm 4 → | May 3, 7:30 pm EDT | Edward Rogas Jr.Director | 10,000 | — | — | 50,000 | — | plan? |
| May 2, 2016 MForm 4 → | May 3, 7:28 pm EDT | Michael W ZellnerDirector | 10,000 | — | — | 48,000 | — | plan? |
| May 2, 2016 MForm 4 → | May 3, 7:20 pm EDT | Mike SlessorCEO, Director | 84,800 | — | — | 282,533 | — | plan? |
| May 2, 2016 MForm 4 → | May 3, 7:13 pm EDT | Michael M LudwigSR VP, CFO | 63,600 | — | — | 210,037 | — | plan? |