FORM
FormFactor, Inc.$115.40-0.93 (-0.80%)Prev Close$116.33·MCap$9.16B·P/E166.71·Vol934.7K·Yield—
▲
Buys (12M)
0
$0.00
▼
Sells (12M)
27
$16.63M
◆
Net Activity
Net Seller
$16.63M
●
Active Insiders
9
last 12 mo
Over the past 12 months, insider activity at FormFactor, Inc. (FORM) has been exclusively selling, with 0 insider purchases totaling $0.00 and 27 insider sales totaling $16.63M. The most recent insider transaction was by St Dennis Thomas (director), who sold $424.2K worth of shares on Jun 16, 2026. FormFactor, Inc. operates in the Technology sector, within the Semiconductors industry, with a market cap of $9.16B.
FORM Insider Trading Activity
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Jun 16, 2026 | St Dennis Thomas | director | Sell | 2,800 | $151.49 | $424.2K | 29,073 |
| Jun 11, 2026 | SLESSOR MIKE | director, officer: CEO | Sell | 11,890 | $121.35 | $1.44M | 445,638 |
| Jun 4, 2026 | Rhodes Sheri | director | Sell | 6,328 | $125.40 | $793.5K | 5,375-54% |
| May 21, 2026 | WHITE BRIAN C | director | Sell | 3,250 | $126.00 | $409.5K | 8,653-27% |
| May 21, 2026 | St Dennis Thomas | director | Sell | 1,000 | $115.84 | $115.8K | 31,873 |
| May 15, 2026 | STEVEN-WAISS KELLEY | director | Sell | 5,400 | $125.60 | $678.2K | 25,179 |
| May 15, 2026 | Titinger Jorge | director | Sell | 4,009 | $128.78 | $516.3K | 13,489 |
| May 14, 2026 | SLESSOR MIKE | director, officer: CEO | Sell | 7,838 | $126.56 | $992.0K | 454,475 |
| Apr 15, 2026 | SLESSOR MIKE | director, officer: CEO | Sell | 11,294 | $127.72 | $1.44M | 459,033 |
| Mar 18, 2026 | SLESSOR MIKE | director, officer: CEO | Sell | 10,227 | $95.15 | $973.1K | 469,186 |
| Mar 6, 2026 | McKinnis Aric Brendan | officer: CFO, SVP Global Finance | Sell | 3,462 | $90.42 | $313.0K | 11,140 |
| Feb 25, 2026 | WHITE BRIAN C | director | Sell | 2,300 | $100.01 | $230.0K | 10,556 |
| Feb 18, 2026 | SLESSOR MIKE | CEO | Sell | 8,664 | $94.14 | $815.6K | 0 |
| Feb 12, 2026 | BREWER KEVIN J | director | Sell | 3,000 | $96.20 | $288.6K | 8,105-27% |
| Feb 11, 2026 | Rhodes Sheri | director | Sell | 7,634 | $92.61 | $707.0K | 10,356-42% |
| Feb 11, 2026 | St Dennis Thomas | director | Sell | 7,431 | $93.84 | $697.4K | 33,356 |
| Feb 11, 2026 | STEVEN-WAISS KELLEY | director | Sell | 2,200 | $93.70 | $206.1K | 30,579 |
| Feb 10, 2026 | Titinger Jorge | director | Sell | 2,000 | $88.84 | $177.7K | 17,498 |
| Feb 10, 2026 | WHITE BRIAN C | director | Sell | 5,500 | $90.95 | $500.2K | 12,856-30% |
| Jan 15, 2026 | SLESSOR MIKE | director, officer: CEO | Sell | 13,088 | $76.81 | $1.01M | 479,019 |
| Jan 6, 2026 | SLESSOR MIKE | director, officer: CEO | Sell | 39,606 | $65.00 | $2.57M | 485,995 |
| Dec 17, 2025 | SLESSOR MIKE | CEO | Sell | 7,669 | $56.36 | $432.2K | 527,664 |
| Dec 2, 2025 | STEVEN-WAISS KELLEY | Director | Sell | 2,700 | $55.97 | $151.1K | 32,779 |
| Nov 19, 2025 | SLESSOR MIKE | CEO | Sell | 8,403 | $50.06 | $420.7K | 536,934 |
| Nov 17, 2025 | St Dennis Thomas | Director | Sell | 2,000 | $49.85 | $99.7K | 38,957 |
| Sep 12, 2025 | STEVEN-WAISS KELLEY | Director | Sell | 3,600 | $30.43 | $109.5K | 35,479 |
| Aug 13, 2025 | Obregon-Jimenez Rebeca | Director | Sell | 4,000 | $29.55 | $118.2K | 13,126 |
| Jul 2, 2025 | SLESSOR MIKE | CEO | Sell | 4,000 | $34.03 | $136.1K | 506,895 |
| Jun 3, 2025 | SLESSOR MIKE | CEO | Sell | 4,000 | $29.83 | $119.3K | 510,895 |
| May 30, 2025 | St Dennis Thomas | Director | Sell | 3,000 | $31.24 | $93.7K | 40,957 |
| May 1, 2025 | SLESSOR MIKE | CEO | Sell | 4,000 | $31.72 | $126.9K | 510,650 |
| Apr 1, 2025 | SLESSOR MIKE | CEO | Sell | 4,000 | $28.24 | $113.0K | 514,650 |
| Mar 6, 2025 | STEVEN-WAISS KELLEY | Director | Sell | 3,870 | $31.02 | $120.0K | 32,551 |
| Mar 4, 2025 | SLESSOR MIKE | CEO | Sell | 4,000 | $33.05 | $132.2K | 518,650 |
| Feb 3, 2025 | SLESSOR MIKE | CEO | Sell | 4,000 | $38.98 | $155.9K | 518,631 |
| Jan 2, 2025 | SLESSOR MIKE | CEO | Sell | 4,000 | $44.44 | $177.8K | 522,931 |
| Dec 2, 2024 | SLESSOR MIKE | CEO | Sell | 4,000 | $40.59 | $162.3K | 526,632 |
| Nov 6, 2024 | St Dennis Thomas | Director | Sell | 3,100 | $39.11 | $121.2K | 37,429 |
| Nov 4, 2024 | SLESSOR MIKE | CEO | Sell | 4,000 | $38.81 | $155.2K | 526,276 |
| Oct 2, 2024 | SLESSOR MIKE | CEO | Sell | 4,000 | $45.28 | $181.1K | 531,276 |
| Sep 4, 2024 | SLESSOR MIKE | CEO | Sell | 4,000 | $46.31 | $185.2K | 535,464 |
| Aug 7, 2024 | Titinger Jorge | Director | Sell | 6,770 | $41.94 | $284.0K | 12,970-34% |
| Aug 5, 2024 | SLESSOR MIKE | CEO | Sell | 4,000 | $50.93 | $203.7K | 526,149 |
| Jul 2, 2024 | SLESSOR MIKE | CEO | Sell | 4,000 | $59.00 | $236.0K | 489,258 |
| Jun 4, 2024 | SLESSOR MIKE | CEO | Sell | 4,000 | $54.37 | $217.5K | 492,811 |
| May 29, 2024 | Obregon-Jimenez Rebeca | Director | Sell | 4,833 | $57.59 | $278.3K | 10,598-31% |
| May 22, 2024 | WHITE BRIAN C | Director | Sell | 3,290 | $57.00 | $187.5K | 11,828 |
| May 15, 2024 | MAIER LOTHAR | Director | Sell | 99,723 | $55.08 | $5.49M | 6,770-94% |
| May 13, 2024 | St Dennis Thomas | Director | Sell | 2,000 | $56.30 | $112.6K | 36,701 |
| May 8, 2024 | Rhodes Sheri | Director | Sell | 13,319 | $56.02 | $746.1K | 7,634-64% |
Showing 1–50 of 75
1 / 2
FORM Insider Buying Activity
The following table shows recent insider purchases of FormFactor, Inc. (FORM) stock reported via SEC Form 4 filings.
No insider buying activity found for FORM in the last 12 months.
FORM Insider Selling Activity
The following table shows recent insider sales of FormFactor, Inc. (FORM) stock reported via SEC Form 4 filings.
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Jun 16, 2026 | St Dennis Thomas | director | Sell | 2,800 | $151.49 | $424.2K | 29,073 |
| Jun 11, 2026 | SLESSOR MIKE | director, officer: CEO | Sell | 11,890 | $121.35 | $1.44M | 445,638 |
| Jun 4, 2026 | Rhodes Sheri | director | Sell | 6,328 | $125.40 | $793.5K | 5,375-54% |
| May 21, 2026 | WHITE BRIAN C | director | Sell | 3,250 | $126.00 | $409.5K | 8,653-27% |
| May 21, 2026 | St Dennis Thomas | director | Sell | 1,000 | $115.84 | $115.8K | 31,873 |
| May 15, 2026 | STEVEN-WAISS KELLEY | director | Sell | 5,400 | $125.60 | $678.2K | 25,179 |
| May 15, 2026 | Titinger Jorge | director | Sell | 4,009 | $128.78 | $516.3K | 13,489 |
| May 14, 2026 | SLESSOR MIKE | director, officer: CEO | Sell | 7,838 | $126.56 | $992.0K | 454,475 |
| Apr 15, 2026 | SLESSOR MIKE | director, officer: CEO | Sell | 11,294 | $127.72 | $1.44M | 459,033 |
| Mar 18, 2026 | SLESSOR MIKE | director, officer: CEO | Sell | 10,227 | $95.15 | $973.1K | 469,186 |
| Mar 6, 2026 | McKinnis Aric Brendan | officer: CFO, SVP Global Finance | Sell | 3,462 | $90.42 | $313.0K | 11,140 |
| Feb 25, 2026 | WHITE BRIAN C | director | Sell | 2,300 | $100.01 | $230.0K | 10,556 |
| Feb 18, 2026 | SLESSOR MIKE | CEO | Sell | 8,664 | $94.14 | $815.6K | 0 |
| Feb 12, 2026 | BREWER KEVIN J | director | Sell | 3,000 | $96.20 | $288.6K | 8,105-27% |
| Feb 11, 2026 | Rhodes Sheri | director | Sell | 7,634 | $92.61 | $707.0K | 10,356-42% |
| Feb 11, 2026 | St Dennis Thomas | director | Sell | 7,431 | $93.84 | $697.4K | 33,356 |
| Feb 11, 2026 | STEVEN-WAISS KELLEY | director | Sell | 2,200 | $93.70 | $206.1K | 30,579 |
| Feb 10, 2026 | Titinger Jorge | director | Sell | 2,000 | $88.84 | $177.7K | 17,498 |
| Feb 10, 2026 | WHITE BRIAN C | director | Sell | 5,500 | $90.95 | $500.2K | 12,856-30% |
| Jan 15, 2026 | SLESSOR MIKE | director, officer: CEO | Sell | 13,088 | $76.81 | $1.01M | 479,019 |
| Jan 6, 2026 | SLESSOR MIKE | director, officer: CEO | Sell | 39,606 | $65.00 | $2.57M | 485,995 |
| Dec 17, 2025 | SLESSOR MIKE | CEO | Sell | 7,669 | $56.36 | $432.2K | 527,664 |
| Dec 2, 2025 | STEVEN-WAISS KELLEY | Director | Sell | 2,700 | $55.97 | $151.1K | 32,779 |
| Nov 19, 2025 | SLESSOR MIKE | CEO | Sell | 8,403 | $50.06 | $420.7K | 536,934 |
| Nov 17, 2025 | St Dennis Thomas | Director | Sell | 2,000 | $49.85 | $99.7K | 38,957 |
| Sep 12, 2025 | STEVEN-WAISS KELLEY | Director | Sell | 3,600 | $30.43 | $109.5K | 35,479 |
| Aug 13, 2025 | Obregon-Jimenez Rebeca | Director | Sell | 4,000 | $29.55 | $118.2K | 13,126 |
| Jul 2, 2025 | SLESSOR MIKE | CEO | Sell | 4,000 | $34.03 | $136.1K | 506,895 |
| Jun 3, 2025 | SLESSOR MIKE | CEO | Sell | 4,000 | $29.83 | $119.3K | 510,895 |
| May 30, 2025 | St Dennis Thomas | Director | Sell | 3,000 | $31.24 | $93.7K | 40,957 |
| May 1, 2025 | SLESSOR MIKE | CEO | Sell | 4,000 | $31.72 | $126.9K | 510,650 |
| Apr 1, 2025 | SLESSOR MIKE | CEO | Sell | 4,000 | $28.24 | $113.0K | 514,650 |
| Mar 6, 2025 | STEVEN-WAISS KELLEY | Director | Sell | 3,870 | $31.02 | $120.0K | 32,551 |
| Mar 4, 2025 | SLESSOR MIKE | CEO | Sell | 4,000 | $33.05 | $132.2K | 518,650 |
| Feb 3, 2025 | SLESSOR MIKE | CEO | Sell | 4,000 | $38.98 | $155.9K | 518,631 |
| Jan 2, 2025 | SLESSOR MIKE | CEO | Sell | 4,000 | $44.44 | $177.8K | 522,931 |
| Dec 2, 2024 | SLESSOR MIKE | CEO | Sell | 4,000 | $40.59 | $162.3K | 526,632 |
| Nov 6, 2024 | St Dennis Thomas | Director | Sell | 3,100 | $39.11 | $121.2K | 37,429 |
| Nov 4, 2024 | SLESSOR MIKE | CEO | Sell | 4,000 | $38.81 | $155.2K | 526,276 |
| Oct 2, 2024 | SLESSOR MIKE | CEO | Sell | 4,000 | $45.28 | $181.1K | 531,276 |
| Sep 4, 2024 | SLESSOR MIKE | CEO | Sell | 4,000 | $46.31 | $185.2K | 535,464 |
| Aug 7, 2024 | Titinger Jorge | Director | Sell | 6,770 | $41.94 | $284.0K | 12,970-34% |
| Aug 5, 2024 | SLESSOR MIKE | CEO | Sell | 4,000 | $50.93 | $203.7K | 526,149 |
| Jul 2, 2024 | SLESSOR MIKE | CEO | Sell | 4,000 | $59.00 | $236.0K | 489,258 |
| Jun 4, 2024 | SLESSOR MIKE | CEO | Sell | 4,000 | $54.37 | $217.5K | 492,811 |
| May 29, 2024 | Obregon-Jimenez Rebeca | Director | Sell | 4,833 | $57.59 | $278.3K | 10,598-31% |
| May 22, 2024 | WHITE BRIAN C | Director | Sell | 3,290 | $57.00 | $187.5K | 11,828 |
| May 15, 2024 | MAIER LOTHAR | Director | Sell | 99,723 | $55.08 | $5.49M | 6,770-94% |
| May 13, 2024 | St Dennis Thomas | Director | Sell | 2,000 | $56.30 | $112.6K | 36,701 |
| May 8, 2024 | Rhodes Sheri | Director | Sell | 13,319 | $56.02 | $746.1K | 7,634-64% |
FORM Insiders
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