Nasdaq · CIK 0001039399
FORM FORMFACTOR INC
Insider trading from SEC Form 4. Last filing 25 d ago. Close $139.67 on Oct 9, 2026, +266% from the 52-week low and -13% from the high.
Last 90 days
Net insider value
-$2.0M
more sold than bought
Buys
0
$0 by 0 insiders
Sells
2
$2.0M by 2 insiders
Insiders on file
10
with a Form 4 at this company
Price and insider trades, last year
FORMOct 9, 2026 · close 139.67
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at FORMFACTOR INC, scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 38Weak | Mike Slessor CEO sell | $1.8M 17,510 shares | -4% | - | |
| 35Weak | Kelley Steven-Waiss director sell | $202k 2,100 shares | -8% | - | |
| 38Weak | Mike Slessor CEO sell | $973k 10,227 shares | -2% | +315% from low-9% from high | |
| 36Weak | Aric Brendan McKinnis CFO, SVP Global Finance sell | $313k 3,462 shares | -24% | +274% from low-18% from high | |
| 48Moderate | Brian C White director sell | $230k 2,300 shares | -18% | +334% from low0% from high | |
| 42Moderate | Mike Slessor CEO sell | $816k 8,664 shares | -2% | +308% from low-2% from high | |
| 54Moderate | Kevin J Brewer director sell | $289k 3,000 shares | -27% | +314% from low0% from high | |
| 42Moderate | Kelley Steven-Waiss director sell | $206k 2,200 shares | -7% | +303% from low-2% from high | |
| 61Notable | Sheri Rhodes director sell | $707k 7,634 shares | -42% | +303% from low-2% from high | |
| 56Moderate | Thomas St Dennis director sell | $697k 7,431 shares | -19% | +303% from low-2% from high | |
| 47Moderate | Jorge Titinger director sell | $178k 2,000 shares | -10% | +309% from low0% from high | |
| 58Moderate | Brian C White director sell | $500k 5,500 shares | -30% | +309% from low0% from high | |
| 48Moderate | Rebeca Obregon-Jimenez director sell | $265k 2,770 shares | -21% | +309% from low0% from high | |
| 30Weak | Mike Slessor CEO sell | $1.0M 13,088 shares | -3% | +225% from low0% from high | |
| 30Weak | Mike Slessor CEO sell | $2.6M 39,606 shares | -8% | +176% from low0% from high | |
| 22Weak | Mike Slessor CEO sell | $432k 7,669 shares | -1% | +132% from low-9% from high | |
| 34Weak | Kelley Steven-Waiss director sell | $151k 2,700 shares | -8% | +142% from low-5% from high | |
| 36Weak | Mike Slessor CEO sell | $421k 8,403 shares | -2% | +118% from low-15% from high | |
| 33Weak | Thomas St Dennis director sell | $100k 2,000 shares | -5% | +112% from low-17% from high | |
| 25Weak | Kelley Steven-Waiss director sell | $110k 3,600 shares | -9% | +30% from low-38% from high | |
| 30Weak | Rebeca Obregon-Jimenez director sell | $118k 4,000 shares | -23% | +32% from low-37% from high | |
| 16Weak | Mike Slessor CEO sell | $136k 4,000 shares | -1% | +51% from low-28% from high | |
| 23Weak | Mike Slessor CEO sell | $119k 4,000 shares | -1% | +30% from low-38% from high | |
| 33Weak | Thomas St Dennis director sell | $94k 3,000 shares | -7% | +34% from low-36% from high | |
| 16Weak | Mike Slessor CEO sell | $127k 4,000 shares | -1% | +25% from low-41% from high | |
| 15Weak | Mike Slessor CEO sell | $113k 4,000 shares | -1% | +0% from low-42% from high | |
| 38Weak | Kelley Steven-Waiss director sell | $120k 3,870 shares | -11% | - | |
| 24Weak | Mike Slessor CEO sell | $132k 4,000 shares | -1% | - | |
| 16Weak | Mike Slessor CEO sell | $156k 4,000 shares | -1% | - | |
| 17Weak | Mike Slessor CEO sell | $178k 4,000 shares | -1% | - | |
| 16Weak | Mike Slessor CEO sell | $162k 4,000 shares | -1% | - | |
| 33Weak | Thomas St Dennis director sell | $121k 3,100 shares | -8% | - | |
| 24Weak | Mike Slessor CEO sell | $155k 4,000 shares | -1% | - |
Transactions
The last 100 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 16, 2026 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -8,737 | $104.26 | $911k | 475,467 | 25 d ago |
| Sep 16, 2026 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -7,773 | $105.12 | $817k | 467,694 | 25 d ago |
| Sep 16, 2026 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -1,000 | $105.80 | $106k | 466,694 | 25 d ago |
| Sep 3, 2026 | Kelley Steven-Waiss director | SOpen-market sale Common Stock | -2,100 | $96.10 | $202k | 24,426 | 38 d ago |
| Mar 18, 2026 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -1,900 | $94.10 | $179k | 469,186 | Mar 18, 2026 |
| Mar 18, 2026 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -5,495 | $95.21 | $523k | 463,691 | Mar 18, 2026 |
| Mar 18, 2026 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -2,832 | $95.73 | $271k | 460,859 | Mar 18, 2026 |
| Mar 5, 2026 | Aric Brendan McKinnis CFO, SVP Global Finance | SOpen-market sale Common Stock10b5-1 | -3,462 | $90.42 | $313k | 11,140 | Mar 6, 2026 |
| Mar 2, 2026 | Aric Brendan McKinnis CFO, SVP Global Finance | MOption exercise Common Stock | +773 | $0.00 | $0 | 14,795 | Mar 3, 2026 |
| Mar 2, 2026 | Aric Brendan McKinnis CFO, SVP Global Finance | FTax withholding Common Stock | -193 | $99.70 | $19k | 14,602 | Mar 3, 2026 |
| Mar 2, 2026 | Aric Brendan McKinnis CFO, SVP Global Finance | MOption exercise Restricted Stock Unitsderivative | -773 | $0.00 | $0 | 773 | Mar 3, 2026 |
| Feb 24, 2026 | Brian C White director | SOpen-market sale Common Stock | -2,300 | $100.01 | $230k | 10,556 | Feb 25, 2026 |
| Feb 18, 2026 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -834 | $92.85 | $77k | 478,916 | Feb 18, 2026 |
| Feb 18, 2026 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -4,934 | $93.97 | $464k | 473,982 | Feb 18, 2026 |
| Feb 18, 2026 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -2,896 | $94.79 | $275k | 471,086 | Feb 18, 2026 |
| Feb 11, 2026 | Kevin J Brewer director | SOpen-market sale Common Stock | -3,000 | $96.20 | $289k | 8,105 | Feb 12, 2026 |
| Feb 10, 2026 | Kelley Steven-Waiss director | SOpen-market sale Common Stock | -2,200 | $93.70 | $206k | 30,579 | Feb 11, 2026 |
| Feb 10, 2026 | Sheri Rhodes director | SOpen-market sale Common Stock | -7,634 | $92.61 | $707k | 10,356 | Feb 11, 2026 |
| Feb 10, 2026 | Thomas St Dennis director | SOpen-market sale Common Stock | -5,601 | $93.71 | $525k | 33,356 | Feb 11, 2026 |
| Feb 9, 2026 | Mike Slessor CEO | MOption exercise Common Stock | +5,908 | $0.00 | $0 | 483,038 | Feb 11, 2026 |
| Feb 10, 2026 | Thomas St Dennis director | SOpen-market sale Common Stock | -1,830 | $94.24 | $172k | 31,526 | Feb 11, 2026 |
| Feb 9, 2026 | Mike Slessor CEO | FTax withholding Common Stock | -3,288 | $94.88 | $312k | 479,750 | Feb 11, 2026 |
| Feb 9, 2026 | Mike Slessor CEO | MOption exercise Restricted Stock Unitsderivative | -5,908 | $0.00 | $0 | 11,816 | Feb 11, 2026 |
| Feb 9, 2026 | Rebeca Obregon-Jimenez director | SOpen-market sale Restricted Stock Units | -2,770 | $95.82 | $265k | 10,356 | Feb 10, 2026 |
| Feb 9, 2026 | Jorge Titinger director | SOpen-market sale Common Stock | -2,000 | $88.84 | $178k | 17,498 | Feb 10, 2026 |
| Feb 9, 2026 | Brian C White director | SOpen-market sale Common Stock | -5,500 | $90.95 | $500k | 12,856 | Feb 10, 2026 |
| Feb 5, 2026 | Mike Slessor CEO | MOption exercise Common Stock | +3,644 | $0.00 | $0 | 476,551 | Feb 9, 2026 |
| Feb 5, 2026 | Aric Brendan McKinnis CFO, SVP Global Finance | MOption exercise Common Stock | +521 | $0.00 | $0 | 13,421 | Feb 9, 2026 |
| Feb 5, 2026 | Mike Slessor CEO | FTax withholding Common Stock | -2,095 | $83.87 | $176k | 474,456 | Feb 9, 2026 |
| Feb 5, 2026 | Aric Brendan McKinnis CFO, SVP Global Finance | FTax withholding Common Stock | -162 | $83.87 | $14k | 13,259 | Feb 9, 2026 |
| Feb 6, 2026 | Mike Slessor CEO | MOption exercise Common Stock | +6,031 | $0.00 | $0 | 480,487 | Feb 9, 2026 |
| Feb 6, 2026 | Aric Brendan McKinnis CFO, SVP Global Finance | MOption exercise Common Stock | +1,099 | $0.00 | $0 | 14,358 | Feb 9, 2026 |
| Feb 6, 2026 | Aric Brendan McKinnis CFO, SVP Global Finance | FTax withholding Common Stock | -336 | $90.29 | $30k | 14,022 | Feb 9, 2026 |
| Feb 6, 2026 | Mike Slessor CEO | FTax withholding Common Stock | -3,357 | $90.29 | $303k | 477,130 | Feb 9, 2026 |
| Feb 5, 2026 | Mike Slessor CEO | MOption exercise Restricted Stock Unitsderivative | -3,644 | $0.00 | $0 | 21,864 | Feb 9, 2026 |
| Feb 5, 2026 | Aric Brendan McKinnis CFO, SVP Global Finance | MOption exercise Restricted Stock Unitsderivative | -521 | $0.00 | $0 | 3,126 | Feb 9, 2026 |
| Feb 6, 2026 | Aric Brendan McKinnis CFO, SVP Global Finance | MOption exercise Restricted Stock Unitsderivative | -1,099 | $0.00 | $0 | 12,089 | Feb 9, 2026 |
| Feb 6, 2026 | Mike Slessor CEO | MOption exercise Restricted Stock Unitsderivative | -6,031 | $0.00 | $0 | 60,310 | Feb 9, 2026 |
| Jan 15, 2026 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -6,976 | $76.43 | $533k | 479,019 | Jan 15, 2026 |
| Jan 15, 2026 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -6,112 | $77.24 | $472k | 472,907 | Jan 15, 2026 |
| Jan 6, 2026 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -39,606 | $65.00 | $2.6M | 485,995 | Jan 6, 2026 |
| Dec 17, 2025 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -5,606 | $56.19 | $315k | 527,664 | Dec 17, 2025 |
| Dec 17, 2025 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -2,063 | $56.82 | $117k | 525,601 | Dec 17, 2025 |
| Dec 2, 2025 | Aric Brendan McKinnis CFO, SVP Global Finance | MOption exercise Common Stock | +773 | $0.00 | $0 | 12,467 | Dec 3, 2025 |
| Dec 2, 2025 | Aric Brendan McKinnis CFO, SVP Global Finance | FTax withholding Common Stock | -193 | $56.04 | $11k | 12,274 | Dec 3, 2025 |
| Dec 2, 2025 | Aric Brendan McKinnis CFO, SVP Global Finance | MOption exercise Restricted Stock Unitsderivative | -773 | $0.00 | $0 | 1,546 | Dec 3, 2025 |
| Dec 2, 2025 | Kelley Steven-Waiss director | SOpen-market sale Common Stock | -2,700 | $55.97 | $151k | 32,779 | Dec 2, 2025 |
| Nov 19, 2025 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -4,739 | $49.65 | $235k | 536,934 | Nov 19, 2025 |
| Nov 19, 2025 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -3,664 | $50.60 | $185k | 533,270 | Nov 19, 2025 |
| Nov 17, 2025 | Thomas St Dennis director | SOpen-market sale Common Stock | -2,000 | $49.85 | $100k | 38,957 | Nov 17, 2025 |
| Nov 7, 2025 | Mike Slessor CEO | MOption exercise Common Stock | +5,908 | $0.00 | $0 | 544,955 | Nov 10, 2025 |
| Nov 7, 2025 | Mike Slessor CEO | FTax withholding Common Stock | -3,282 | $52.25 | $171k | 541,673 | Nov 10, 2025 |
| Nov 7, 2025 | Mike Slessor CEO | MOption exercise Restricted Stock Unitsderivative | -5,908 | $0.00 | $0 | 17,724 | Nov 10, 2025 |
| Nov 6, 2025 | Aric Brendan McKinnis CFO, SVP Global Finance | AGrant or award Restricted Stock Unitsderivative | +13,188 | $0.00 | $0 | 13,188 | Nov 7, 2025 |
| Nov 5, 2025 | Mike Slessor CEO | MOption exercise Common Stock | +3,644 | - | - | 538,392 | Nov 7, 2025 |
| Nov 5, 2025 | Mike Slessor CEO | FTax withholding Common Stock | -2,025 | $55.36 | $112k | 536,367 | Nov 7, 2025 |
| Nov 6, 2025 | Mike Slessor CEO | MOption exercise Common Stock | +6,031 | - | - | 542,398 | Nov 7, 2025 |
| Nov 6, 2025 | Mike Slessor CEO | FTax withholding Common Stock | -3,351 | $54.22 | $182k | 539,047 | Nov 7, 2025 |
| Nov 5, 2025 | Mike Slessor CEO | MOption exercise Restricted Stock Unitsderivative | -3,644 | $0.00 | $0 | 25,508 | Nov 7, 2025 |
| Nov 6, 2025 | Mike Slessor CEO | MOption exercise Restricted Stock Unitsderivative | -6,031 | $0.00 | $0 | 66,341 | Nov 7, 2025 |
| Nov 5, 2025 | Aric Brendan McKinnis CFO, SVP Global Finance | MOption exercise Common Stock | +521 | $0.00 | $0 | 11,824 | Nov 5, 2025 |
| Nov 5, 2025 | Aric Brendan McKinnis CFO, SVP Global Finance | FTax withholding Common Stock | -130 | $55.36 | $7,197 | 11,694 | Nov 5, 2025 |
| Nov 5, 2025 | Aric Brendan McKinnis CFO, SVP Global Finance | MOption exercise Restricted Stock Unitsderivative | -521 | $0.00 | $0 | 3,647 | Nov 5, 2025 |
| Nov 3, 2025 | Mike Slessor CEO | GGift Common Stock | -5,000 | $0.00 | $0 | 534,748 | Nov 4, 2025 |
| Sep 12, 2025 | Kelley Steven-Waiss director | SOpen-market sale Common Stock | -3,600 | $30.43 | $110k | 35,479 | Sep 12, 2025 |
| Sep 2, 2025 | Aric Brendan McKinnis CFO, SVP Global Finance | MOption exercise Common Stock | +773 | $0.00 | $0 | 11,496 | Sep 3, 2025 |
| Sep 2, 2025 | Aric Brendan McKinnis CFO, SVP Global Finance | FTax withholding Common Stock | -193 | $28.43 | $5,487 | 11,303 | Sep 3, 2025 |
| Sep 2, 2025 | Aric Brendan McKinnis CFO, SVP Global Finance | MOption exercise Restricted Stock Unitsderivative | -773 | $0.00 | $0 | 2,319 | Sep 3, 2025 |
| Aug 13, 2025 | Rebeca Obregon-Jimenez director | SOpen-market sale Common Stock | -4,000 | $29.55 | $118k | 13,126 | Aug 13, 2025 |
| Aug 7, 2025 | Shai Shahar CFO, SVP Global Finance | MOption exercise Common Stock | +2,955 | - | - | 57,610 | Aug 8, 2025 |
| Aug 7, 2025 | Mike Slessor CEO | MOption exercise Common Stock | +5,908 | - | - | 543,030 | Aug 8, 2025 |
| Aug 7, 2025 | Shai Shahar CFO, SVP Global Finance | FTax withholding Common Stock | -1,642 | $27.98 | $46k | 55,968 | Aug 8, 2025 |
| Aug 7, 2025 | Mike Slessor CEO | FTax withholding Common Stock | -3,282 | $27.98 | $92k | 539,748 | Aug 8, 2025 |
| Aug 7, 2025 | Shai Shahar CFO, SVP Global Finance | MOption exercise Restricted Stock Unitsderivative | -2,955 | $0.00 | $0 | 11,820 | Aug 8, 2025 |
| Aug 6, 2025 | Mike Slessor CEO | AGrant or award Restricted Stock Unitsderivative | +72,372 | $0.00 | $0 | 72,372 | Aug 8, 2025 |
| Aug 7, 2025 | Mike Slessor CEO | MOption exercise Restricted Stock Unitsderivative | -5,908 | $0.00 | $0 | 23,632 | Aug 8, 2025 |
| Aug 5, 2025 | Shai Shahar CFO, SVP Global Finance | MOption exercise Common Stock | +1,116 | - | - | 55,275 | Aug 6, 2025 |
| Aug 5, 2025 | Mike Slessor CEO | MOption exercise Common Stock | +3,644 | - | - | 539,147 | Aug 6, 2025 |
| Aug 5, 2025 | Shai Shahar CFO, SVP Global Finance | FTax withholding Common Stock | -620 | $29.14 | $18k | 54,655 | Aug 6, 2025 |
| Aug 5, 2025 | Mike Slessor CEO | FTax withholding Common Stock | -2,025 | $29.14 | $59k | 537,122 | Aug 6, 2025 |
| Aug 5, 2025 | Shai Shahar CFO, SVP Global Finance | MOption exercise Restricted Stock Unitsderivative | -1,116 | $0.00 | $0 | 8,928 | Aug 6, 2025 |
| Aug 5, 2025 | Mike Slessor CEO | MOption exercise Restricted Stock Unitsderivative | -3,644 | $0.00 | $0 | 29,152 | Aug 6, 2025 |
| Aug 1, 2025 | Shai Shahar CFO, SVP Global Finance | MOption exercise Common Stock | +17,477 | $0.00 | $0 | 61,481 | Aug 4, 2025 |
| Aug 1, 2025 | Mike Slessor CEO | MOption exercise Common Stock10b5-1 | +49,935 | $0.00 | $0 | 556,830 | Aug 4, 2025 |
| Aug 1, 2025 | Shai Shahar CFO, SVP Global Finance | FTax withholding Common Stock | -9,709 | $28.93 | $281k | 51,772 | Aug 4, 2025 |
| Aug 1, 2025 | Mike Slessor CEO | FTax withholding Common Stock10b5-1 | -27,739 | $28.93 | $802k | 529,091 | Aug 4, 2025 |
| Aug 1, 2025 | Shai Shahar CFO, SVP Global Finance | MOption exercise Common Stock | +5,049 | $0.00 | $0 | 56,821 | Aug 4, 2025 |
| Aug 1, 2025 | Mike Slessor CEO | MOption exercise Common Stock10b5-1 | +14,426 | $0.00 | $0 | 543,517 | Aug 4, 2025 |
| Aug 1, 2025 | Shai Shahar CFO, SVP Global Finance | FTax withholding Common Stock | -2,805 | $28.93 | $81k | 54,159 | Aug 4, 2025 |
| Aug 1, 2025 | Mike Slessor CEO | FTax withholding Common Stock10b5-1 | -8,014 | $28.93 | $232k | 535,503 | Aug 4, 2025 |
| Aug 1, 2025 | Shai Shahar CFO, SVP Global Finance | AGrant or award Performance-based Restricted Stock Unitsderivative | +17,477 | $0.00 | $0 | 17,477 | Aug 4, 2025 |
| Aug 1, 2025 | Mike Slessor CEO | AGrant or award Performance-based Restricted Stock Unitsderivative10b5-1 | +49,935 | $0.00 | $0 | 49,935 | Aug 4, 2025 |
| Aug 1, 2025 | Shai Shahar CFO, SVP Global Finance | MOption exercise Performance-based Restricted Stock Unitsderivative | -17,477 | $0.00 | $0 | 0 | Aug 4, 2025 |
| Aug 1, 2025 | Mike Slessor CEO | MOption exercise Performance-based Restricted Stock Unitsderivative10b5-1 | -49,935 | $0.00 | $0 | 0 | Aug 4, 2025 |
| Aug 1, 2025 | Shai Shahar CFO, SVP Global Finance | MOption exercise Restricted Stock Unitsderivative | -5,049 | $0.00 | $0 | 0 | Aug 4, 2025 |
| Aug 1, 2025 | Mike Slessor CEO | MOption exercise Restricted Stock Unitsderivative10b5-1 | -14,426 | $0.00 | $0 | 0 | Aug 4, 2025 |
| Jul 1, 2025 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -4,000 | $34.03 | $136k | 506,895 | Jul 2, 2025 |
| Jun 2, 2025 | Mike Slessor CEO | SOpen-market sale Common Stock10b5-1 | -4,000 | $29.83 | $119k | 510,895 | Jun 3, 2025 |
| May 29, 2025 | Thomas St Dennis director | SOpen-market sale Common Stock | -3,000 | $31.24 | $94k | 40,957 | May 30, 2025 |
| May 16, 2025 | Kevin J Brewer director | AGrant or award Common Stock | +6,528 | $0.00 | $0 | 11,105 | May 16, 2025 |
Insiders
Everyone who has filed a Form 4 here.
- Kevin J Brewerdirector
- Aric Brendan McKinnisCFO, SVP Global Finance
- Rebeca Obregon-Jimenezdirector
- Sheri Rhodesdirector
- Mike SlessorCEO
- Kelley Steven-Waissdirector
- Shai ShaharCFO, SVP Global Finance
- Thomas St Dennisdirector
- Jorge Titingerdirector
- Brian C Whitedirector
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.