Quick Takeaways
- FORM - FORMFACTOR INC has 13 insiders with reported activity on this page.
- Net insider value flow over the last year: -$10,561,262.
- Recent transaction rows are available for direct filing-level review.
- Info
- Insider Trading
- Financials
- Holders
Insider Transactions Reported by 13 Insiders of FORMFACTOR INC
- Symbol
- FORM on Nasdaq
- Location
- Livermore, CA
What Changed
- Buy value: ; sell value: $10,561,261.
- Net share flow: -151,254.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Official SEC Source
Insider trading overview
Last 12 monthsNet insider flow leans to selling over the last 12 months. Net value: -$10,561,262.
Buys
$0
Shares: 0
Insiders: 0
Sells
$10,561,262
Shares: 151,254
Insiders: 9
Net
-$10,561,262
Shares: -151,254
Insiders: -9
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 68,276 | $0 | $6,179,390 | -$6,179,390 |
| 3-6 | 0 | 60,378 | $0 | $3,678,099 | -$3,678,099 |
| 6-9 | 0 | 7,600 | $0 | $227,732 | -$227,732 |
| 9-12 | 0 | 15,000 | $0 | $476,040 | -$476,040 |
FORMFACTOR INC executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Mike Slessor | CEO, Director | $45,575,654 | -$6,603,560 | -13% | Mixed | 18 Mar 2026 |
| Thomas St Dennis | Director | $2,971,029 | -$890,768 | -23% | Filing P/S | 10 Feb 2026 |
| Kelley Steven-Waiss | Director | $2,865,237 | -$466,774 | -14% | Filing P/S | 10 Feb 2026 |
| Raymond A. Link | Director | $2,484,106 | Mixed | 30 May 2023 | ||
| Shai Shahar | CFO, SVP Global Finance | $2,295,042 | Mixed | 07 Aug 2025 | ||
| Jorge Titinger | Director | $1,554,522 | -$177,680 | -10% | Filing P/S | 09 Feb 2026 |
| Rebeca Obregon-Jimenez | Director | $1,380,193 | -$383,624 | -22% | Filing P/S | 09 Feb 2026 |
| Brian C. White | Director | $1,055,705 | -$730,248 | -41% | Filing P/S | 24 Feb 2026 |
| Aric Brendan McKinnis | CFO, SVP Global Finance | $1,007,278 | -$313,034 | -24% | Filing P/S | 05 Mar 2026 |
| Sheri Rhodes | Director | $959,053 | -$706,973 | -42% | Filing P/S | 10 Feb 2026 |
| Edward Rogas Jr. | Director | $828,898 | Mixed | 17 May 2021 | ||
| Kevin J. Brewer | Director | $779,701 | -$288,600 | -27% | Filing P/S | 11 Feb 2026 |
| Lothar Maier | Director | $372,890 | Filing P/S | 14 May 2024 |
Top shareholders of FORMFACTOR INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
|
Company |
15%
|
11,569,639
|
$645,354,469 | — | 31 Dec 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
13%
|
10,221,530
|
$570,156,943 | — | 31 Dec 2025 | |
| EARNEST PARTNERS LLC |
13F
|
Company |
7.5%
|
5,774,992
|
$322,129,054 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
3.7%
|
2,869,544
|
$160,063,164 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
3.2%
|
2,516,390
|
$140,364,235 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
2.9%
|
2,271,562
|
$126,707,810 | — | 31 Dec 2025 | |
| REINHART PARTNERS, LLC. |
13F
|
Company |
2.8%
|
2,152,348
|
$120,058,726 | — | 31 Dec 2025 | |
| PRIMECAP MANAGEMENT CO/CA/ |
13F
|
Company |
2.7%
|
2,081,246
|
$116,091,902 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
2.4%
|
1,885,847
|
$105,207,947 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
2.2%
|
1,722,259
|
$96,073,245 | — | 31 Dec 2025 | |
| SEI INVESTMENTS CO |
13F
|
Company |
2.2%
|
1,685,072
|
$93,993,316 | — | 31 Dec 2025 | |
| ALLIANCEBERNSTEIN L.P. |
13F
|
Company |
1.8%
|
1,414,688
|
$78,911,297 | — | 31 Dec 2025 | |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ |
13F
|
Company |
1.8%
|
1,369,024
|
$76,364,159 | — | 31 Dec 2025 | |
| AMERIPRISE FINANCIAL INC |
13F
|
Company |
1.7%
|
1,316,050
|
$73,409,270 | — | 31 Dec 2025 | |
| VICTORY CAPITAL MANAGEMENT INC |
13F
|
Company |
1.6%
|
1,256,545
|
$70,090,080 | — | 31 Dec 2025 | |
| ROYCE & ASSOCIATES LP |
13F
|
Company |
1.5%
|
1,157,891
|
$64,587,160 | — | 31 Dec 2025 | |
| FULLER & THALER ASSET MANAGEMENT, INC. |
13F
|
Company |
1.4%
|
1,084,528
|
$60,494,988 | — | 31 Dec 2025 | |
| Channing Capital Management, LLC |
13F
|
Company |
1.3%
|
1,000,729
|
$55,820,664 | — | 31 Dec 2025 | |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
|
Company |
1.2%
|
964,578
|
$53,805,000 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
1.2%
|
951,728
|
$53,087,388 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
1.1%
|
884,727
|
$49,350,072 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
1.1%
|
824,386
|
$45,984,251 | — | 31 Dec 2025 | |
| Mike Slessor |
3/4/5
|
CEO, Director |
—
mixed-class rows
|
472,675
mixed-class rows
|
$45,575,654 | -$6,603,560 | 18 Mar 2026 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.97%
|
751,352
|
$41,910,432 | — | 31 Dec 2025 | |
| Nuveen, LLC |
13F
|
Company |
0.91%
|
705,927
|
$39,376,607 | — | 31 Dec 2025 | |
| NEEDHAM INVESTMENT MANAGEMENT LLC |
13F
|
Company |
0.9%
|
694,500
|
$38,739,210 | — | 31 Dec 2025 | |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP |
13F
|
Company |
0.78%
|
601,763
|
$33,566,340 | — | 31 Dec 2025 | |
| ROYAL BANK OF CANADA |
13F
|
Company |
0.76%
|
586,649
|
$32,722,000 | — | 31 Dec 2025 | |
| NORGES BANK |
13F
|
Company |
0.73%
|
563,841
|
$31,451,051 | — | 31 Dec 2025 | |
| Assenagon Asset Management S.A. |
13F
|
Company |
0.73%
|
562,769
|
$31,391,255 | — | 31 Dec 2025 | |
| VOYA INVESTMENT MANAGEMENT LLC |
13F
|
Company |
0.73%
|
562,692
|
$31,386,960 | — | 31 Dec 2025 | |
| BESSEMER GROUP INC |
13F
|
Company |
0.73%
|
562,042
|
$31,351,000 | — | 31 Dec 2025 | |
| WESTFIELD CAPITAL MANAGEMENT CO LP |
13F
|
Company |
0.58%
|
449,604
|
$25,078,911 | — | 31 Dec 2025 | |
| Fisher Asset Management, LLC |
13F
|
Company |
0.56%
|
436,045
|
$24,322,589 | — | 31 Dec 2025 | |
| Point72 Asset Management, L.P. |
13F
|
Company |
0.56%
|
430,087
|
$23,990,253 | — | 31 Dec 2025 | |
| Select Equity Group, L.P. |
13F
|
Company |
0.55%
|
426,819
|
$23,807,964 | — | 31 Dec 2025 | |
| NATIXIS ADVISORS, LLC |
13F
|
Company |
0.54%
|
418,631
|
$23,351,000 | — | 31 Dec 2025 | |
| PRINCIPAL FINANCIAL GROUP INC |
13F
|
Company |
0.48%
|
370,395
|
$20,660,633 | — | 31 Dec 2025 | |
| T. Rowe Price Investment Management, Inc. |
13F
|
Company |
0.46%
|
359,479
|
$20,052,000 | — | 31 Dec 2025 | |
| ENVESTNET ASSET MANAGEMENT INC |
13F
|
Company |
0.46%
|
358,786
|
$20,013,100 | — | 31 Dec 2025 | |
| Invesco Ltd. |
13F
|
Company |
0.43%
|
332,927
|
$18,570,668 | — | 31 Dec 2025 | |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC |
13F
|
Company |
0.42%
|
323,429
|
$18,040,870 | — | 31 Dec 2025 | |
| WELLS FARGO & COMPANY/MN |
13F
|
Company |
0.41%
|
315,252
|
$17,584,776 | — | 31 Dec 2025 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
0.4%
|
313,161
|
$17,468,121 | — | 31 Dec 2025 | |
| FRANKLIN RESOURCES INC |
13F
|
Company |
0.37%
|
287,572
|
$16,040,766 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
0.37%
|
283,393
|
$15,807,661 | — | 31 Dec 2025 | |
| First Eagle Investment Management, LLC |
13F
|
Company |
0.35%
|
269,222
|
$15,017,203 | — | 31 Dec 2025 | |
| PUBLIC SECTOR PENSION INVESTMENT BOARD |
13F
|
Company |
0.35%
|
268,329
|
$14,967,392 | — | 31 Dec 2025 | |
| NEW YORK STATE COMMON RETIREMENT FUND |
13F
|
Company |
0.34%
|
260,833
|
$14,549,265 | — | 31 Dec 2025 | |
| PINNACLE ASSOCIATES LTD |
13F
|
Company |
0.31%
|
239,778
|
$13,374,817 | — | 31 Dec 2025 |
Recent Insider Transactions by Companies or Individuals for FORMFACTOR INC
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Mike Slessor | FORM | Common Stock | Sale | -2.17% | $973,076 | $95.15 | -10,227 | 460,859 | 18 Mar 2026 | Direct |
| Aric Brendan McKinnis | FORM | Common Stock | Sale | -23.7% | $313,034 | $90.42 | -3,462 | 11,140 | 05 Mar 2026 | Direct |
| Aric Brendan McKinnis | FORM | Common Stock | Tax liability | -1.3% | -193 | 14,602 | 02 Mar 2026 | Direct | ||
| Aric Brendan McKinnis | FORM | Common Stock | Options Exercise | 5.51% | 773 | 14,795 | 02 Mar 2026 | Direct | ||
| Aric Brendan McKinnis | FORM | Restricted Stock Units | Options Exercise | -50% | -773 | 773 | 02 Mar 2026 | Direct | ||
| Brian C. White | FORM | Common Stock | Sale | -17.9% | $230,023 | $100.01 | -2,300 | 10,556 | 24 Feb 2026 | Direct |
| Mike Slessor | FORM | Common Stock | Sale | -1.81% | $815,597 | $94.14 | -8,664 | 471,086 | 18 Feb 2026 | Direct |
| Kevin J. Brewer | FORM | Common Stock | Sale | -27% | $288,600 | $96.20 | -3,000 | 8,105 | 11 Feb 2026 | Direct |
| Thomas St Dennis | FORM | Common Stock | Sale | -19.1% | $697,355 | $93.84 | -7,431 | 31,526 | 10 Feb 2026 | Direct |
| Sheri Rhodes | FORM | Common Stock | Sale | -42.4% | $706,973 | $92.61 | -7,634 | 10,356 | 10 Feb 2026 | Direct |
| Kelley Steven-Waiss | FORM | Common Stock | Sale | -6.71% | $206,139 | $93.70 | -2,200 | 30,579 | 10 Feb 2026 | Direct |
| Mike Slessor | FORM | Common Stock | Tax liability | -0.68% | -3,288 | 479,750 | 09 Feb 2026 | Direct | ||
| Mike Slessor | FORM | Common Stock | Options Exercise | 1.24% | 5,908 | 483,038 | 09 Feb 2026 | Direct | ||
| Mike Slessor | FORM | Restricted Stock Units | Options Exercise | -33.3% | -5,908 | 11,816 | 09 Feb 2026 | Direct | ||
| Rebeca Obregon-Jimenez | FORM | Restricted Stock Units | Sale | -21.1% | $265,422 | $95.82 | -2,770 | 10,356 | 09 Feb 2026 | Direct |
| Brian C. White | FORM | Common Stock | Sale | -30% | $500,225 | $90.95 | -5,500 | 12,856 | 09 Feb 2026 | Direct |
| Jorge Titinger | FORM | Common Stock | Sale | -10.3% | $177,680 | $88.84 | -2,000 | 17,498 | 09 Feb 2026 | Direct |
| Aric Brendan McKinnis | FORM | Common Stock | Tax liability | -2.34% | -336 | 14,022 | 06 Feb 2026 | Direct | ||
| Aric Brendan McKinnis | FORM | Common Stock | Options Exercise | 8.29% | 1,099 | 14,358 | 06 Feb 2026 | Direct | ||
| Aric Brendan McKinnis | FORM | Restricted Stock Units | Options Exercise | -8.33% | -1,099 | 12,089 | 06 Feb 2026 | Direct | ||
| Mike Slessor | FORM | Common Stock | Tax liability | -0.7% | -3,357 | 477,130 | 06 Feb 2026 | Direct | ||
| Mike Slessor | FORM | Common Stock | Options Exercise | 1.27% | 6,031 | 480,487 | 06 Feb 2026 | Direct | ||
| Mike Slessor | FORM | Restricted Stock Units | Options Exercise | -9.09% | -6,031 | 60,310 | 06 Feb 2026 | Direct | ||
| Aric Brendan McKinnis | FORM | Common Stock | Tax liability | -1.21% | -162 | 13,259 | 05 Feb 2026 | Direct | ||
| Aric Brendan McKinnis | FORM | Common Stock | Options Exercise | 4.04% | 521 | 13,421 | 05 Feb 2026 | Direct | ||
| Aric Brendan McKinnis | FORM | Restricted Stock Units | Options Exercise | -14.3% | -521 | 3,126 | 05 Feb 2026 | Direct | ||
| Mike Slessor | FORM | Common Stock | Tax liability | -0.44% | -2,095 | 474,456 | 05 Feb 2026 | Direct | ||
| Mike Slessor | FORM | Common Stock | Options Exercise | 0.77% | 3,644 | 476,551 | 05 Feb 2026 | Direct | ||
| Mike Slessor | FORM | Restricted Stock Units | Options Exercise | -14.3% | -3,644 | 21,864 | 05 Feb 2026 | Direct | ||
| Mike Slessor | FORM | Common Stock | Sale | -2.69% | $1,005,267 | $76.81 | -13,088 | 472,907 | 15 Jan 2026 | Direct |
| Mike Slessor | FORM | Common Stock | Sale | -7.54% | $2,574,390 | $65.00 | -39,606 | 485,995 | 06 Jan 2026 | Direct |
| Mike Slessor | FORM | Common Stock | Sale | -1.44% | $432,221 | $56.36 | -7,669 | 525,601 | 17 Dec 2025 | Direct |
| Aric Brendan McKinnis | FORM | Common Stock | Tax liability | -1.55% | -193 | 12,274 | 02 Dec 2025 | Direct | ||
| Aric Brendan McKinnis | FORM | Common Stock | Options Exercise | 6.61% | 773 | 12,467 | 02 Dec 2025 | Direct | ||
| Aric Brendan McKinnis | FORM | Restricted Stock Units | Options Exercise | -33.3% | -773 | 1,546 | 02 Dec 2025 | Direct | ||
| Kelley Steven-Waiss | FORM | Common Stock | Sale | -7.61% | $151,106 | $55.96 | -2,700 | 32,779 | 02 Dec 2025 | Direct |
| Mike Slessor | FORM | Common Stock | Sale | -1.55% | $420,690 | $50.06 | -8,403 | 533,270 | 19 Nov 2025 | Direct |
| Thomas St Dennis | FORM | Common Stock | Sale | -4.88% | $99,693 | $49.85 | -2,000 | 38,957 | 17 Nov 2025 | Direct |
| Mike Slessor | FORM | Common Stock | Tax liability | -0.6% | -3,282 | 541,673 | 07 Nov 2025 | Direct | ||
| Mike Slessor | FORM | Common Stock | Options Exercise | 1.1% | 5,908 | 544,955 | 07 Nov 2025 | Direct | ||
| Mike Slessor | FORM | Restricted Stock Units | Options Exercise | -25% | -5,908 | 17,724 | 07 Nov 2025 | Direct | ||
| Aric Brendan McKinnis | FORM | Restricted Stock Units | Award | 13,188 | 13,188 | 06 Nov 2025 | Direct | |||
| Mike Slessor | FORM | Common Stock | Tax liability | -0.62% | -3,351 | 539,047 | 06 Nov 2025 | Direct | ||
| Mike Slessor | FORM | Common Stock | Options Exercise | 1.12% | 6,031 | 542,398 | 06 Nov 2025 | Direct | ||
| Mike Slessor | FORM | Restricted Stock Units | Options Exercise | -8.33% | -6,031 | 66,341 | 06 Nov 2025 | Direct | ||
| Mike Slessor | FORM | Common Stock | Tax liability | -0.38% | -2,025 | 536,367 | 05 Nov 2025 | Direct | ||
| Mike Slessor | FORM | Common Stock | Options Exercise | 0.68% | 3,644 | 538,392 | 05 Nov 2025 | Direct | ||
| Mike Slessor | FORM | Restricted Stock Units | Options Exercise | -12.5% | -3,644 | 25,508 | 05 Nov 2025 | Direct | ||
| Aric Brendan McKinnis | FORM | Common Stock | Tax liability | -1.1% | -130 | 11,694 | 05 Nov 2025 | Direct | ||
| Aric Brendan McKinnis | FORM | Common Stock | Options Exercise | 4.61% | 521 | 11,824 | 05 Nov 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.