The Filings Report

FormFactor Inc. insider trading

FORMfinancial statementsForm 4 filings on EDGAR185 transactions since Nov 9, 2024

From August 12, 2026 to November 9, 2026, 0 insiders at FormFactor Inc. bought $0 of stock in the open market, and 2 sold $6M. Officers and directors accounted for $0 of purchases and $6M of sales. The last reported transaction was an open-market sale by Slessor Mike on October 14, 2026.

The answer card and chart use the same period. Change the range above the chart to update both. Form 4 filings through October 14, 2026; awards, option exercises, tax withholding and gifts are excluded from these totals.

Stock price and insider activity

Daily price candles with insider purchases and sales directly beneath them on the same timeline. Bars show individual days; totals sum all days in the selected period.

FORM daily priceSplit-adjusted prices in US dollars

Bought $0Sold $6MAug 12, 2026 – Nov 9, 2026

Nov 6, 2026O $81.03 · H $81.55 · L $77.13 · C $81.12Bought $0 (0)Sold $0 (0)
$65$88$111$133$1562026-08-12: open $127.80, high $130.47, low $125.54, close $128.772026-08-13: open $128.03, high $135.64, low $127.26, close $131.672026-08-14: open $129.48, high $134.29, low $127.36, close $131.602026-08-17: open $134.05, high $139.80, low $133.19, close $138.162026-08-18: open $129.28, high $129.57, low $120.01, close $124.342026-08-19: open $126.03, high $126.03, low $113.55, close $114.952026-08-20: open $114.50, high $117.60, low $112.43, close $115.712026-08-21: open $117.69, high $117.80, low $110.32, close $114.162026-08-24: open $110.63, high $112.16, low $104.77, close $107.902026-08-25: open $112.41, high $112.41, low $106.79, close $107.722026-08-26: open $107.80, high $110.22, low $104.68, close $108.102026-08-27: open $112.00, high $113.90, low $109.26, close $110.232026-08-28: open $109.46, high $109.95, low $101.33, close $101.702026-08-31: open $103.15, high $103.17, low $99.77, close $100.612026-09-01: open $99.27, high $99.54, low $94.99, close $95.412026-09-02: open $95.50, high $97.50, low $93.51, close $96.582026-09-03: open $95.03, high $97.16, low $92.05, close $96.762026-09-04: open $99.64, high $104.20, low $99.01, close $103.902026-09-08: open $107.09, high $111.99, low $106.64, close $109.862026-09-09: open $109.53, high $115.95, low $108.52, close $114.182026-09-10: open $110.00, high $115.81, low $110.00, close $112.122026-09-11: open $113.68, high $117.12, low $112.94, close $114.952026-09-14: open $104.24, high $109.06, low $102.67, close $102.942026-09-15: open $105.13, high $105.17, low $100.39, close $101.692026-09-16: open $105.00, high $106.13, low $103.13, close $104.822026-09-17: open $109.64, high $112.68, low $109.25, close $111.532026-09-18: open $114.00, high $118.67, low $113.50, close $118.382026-09-21: open $123.00, high $123.78, low $118.49, close $119.312026-09-22: open $116.82, high $126.17, low $116.52, close $126.012026-09-23: open $125.39, high $131.48, low $123.64, close $131.392026-09-24: open $126.98, high $129.86, low $124.36, close $129.042026-09-25: open $130.85, high $133.06, low $128.22, close $129.692026-09-28: open $129.32, high $131.16, low $124.10, close $130.972026-09-29: open $132.51, high $136.69, low $132.51, close $136.252026-09-30: open $142.30, high $150.65, low $140.14, close $149.312026-10-01: open $149.45, high $149.70, low $145.07, close $148.442026-10-02: open $150.32, high $151.18, low $145.89, close $149.152026-10-05: open $150.50, high $151.17, low $143.69, close $147.992026-10-06: open $148.32, high $148.41, low $140.88, close $141.302026-10-07: open $137.27, high $142.40, low $135.69, close $139.802026-10-08: open $136.28, high $143.64, low $134.54, close $137.132026-10-09: open $141.08, high $142.81, low $137.68, close $139.672026-10-12: open $136.86, high $136.86, low $129.51, close $130.282026-10-13: open $127.64, high $128.25, low $121.58, close $128.092026-10-14: open $124.11, high $126.29, low $118.89, close $119.712026-10-15: open $112.99, high $114.35, low $106.48, close $113.342026-10-16: open $110.72, high $111.70, low $104.62, close $105.012026-10-19: open $110.46, high $114.87, low $110.08, close $110.162026-10-20: open $106.95, high $109.68, low $103.93, close $107.702026-10-21: open $110.95, high $112.75, low $109.35, close $112.182026-10-22: open $103.48, high $105.14, low $94.60, close $95.032026-10-23: open $94.25, high $100.50, low $93.01, close $98.512026-10-26: open $99.98, high $104.16, low $98.47, close $101.112026-10-27: open $103.97, high $107.29, low $102.83, close $106.852026-10-28: open $109.38, high $111.85, low $107.00, close $110.312026-10-29: open $101.80, high $103.29, low $96.42, close $97.462026-10-30: open $89.84, high $91.05, low $84.53, close $87.532026-11-02: open $89.54, high $92.61, low $87.09, close $87.302026-11-03: open $91.12, high $97.67, low $90.27, close $96.792026-11-04: open $94.87, high $96.05, low $83.53, close $85.242026-11-05: open $79.77, high $80.23, low $69.88, close $71.682026-11-06: open $81.03, high $81.55, low $77.13, close $81.12Insider purchases / sales · USD$5M$0−$5M2026-08-14: 0 purchases ($0), 6 sales ($2M)2026-09-03: 0 purchases ($0), 1 sales ($202K)2026-09-16: 0 purchases ($0), 3 sales ($2M)2026-10-14: 0 purchases ($0), 3 sales ($1M)Aug 12Sep 2Sep 25Oct 16Nov 6

purchases above zero; sales below. Both use the transaction date and the same dollar scale. Hover, tap, or use arrow keys to inspect a date. Awards, exercises, tax withholding and gifts are excluded.

Dates with prices or insider activity are spaced evenly; empty weekends and holidays are omitted. Prices through Nov 6, 2026. Insider data through Nov 9, 2026. Prices are adjusted for splits; transaction values are reported dollars.

Every transaction

185 transactions from November 9, 2024 to November 9, 2026, newest first. Open-market purchases and sales are coloured; awards, exercises, tax withholding and gifts are grey and not counted.

TradedInsiderRoleTransactionSharesPriceValueHeld afterFiled
Oct 14, 2026Slessor MikeCEO, Directoropen-market sale10b5-12,195$124.23$273K464,499Oct 14, 2026
Oct 14, 2026Slessor MikeCEO, Directoropen-market sale10b5-17,703$125.36$966K456,796Oct 14, 2026
Oct 14, 2026Slessor MikeCEO, Directoropen-market sale10b5-11,200$125.92$151K455,596Oct 14, 2026
Sep 16, 2026Slessor MikeCEO, Directoropen-market sale10b5-18,737$104.26$911K475,467Sep 17, 2026
Sep 16, 2026Slessor MikeCEO, Directoropen-market sale10b5-17,773$105.12$817K467,694Sep 17, 2026
Sep 16, 2026Slessor MikeCEO, Directoropen-market sale10b5-11,000$105.80$106K466,694Sep 17, 2026
Sep 3, 2026Steven-Waiss KelleyDirectoropen-market sale2,100$96.10$202K24,426Sep 4, 2026
Aug 14, 2026Slessor MikeCEO, Directoropen-market sale10b5-12,482$128.72$319K497,724Aug 17, 2026
Aug 14, 2026Slessor MikeCEO, Directoropen-market sale10b5-12,892$129.55$375K494,832Aug 17, 2026
Aug 14, 2026Slessor MikeCEO, Directoropen-market sale10b5-13,282$130.54$428K491,550Aug 17, 2026
Aug 14, 2026Slessor MikeCEO, Directoropen-market sale10b5-11,125$131.65$148K490,425Aug 17, 2026
Aug 14, 2026Slessor MikeCEO, Directoropen-market sale10b5-15,535$132.50$733K484,890Aug 17, 2026
Aug 14, 2026Slessor MikeCEO, Directoropen-market sale10b5-1686$133.33$91K484,204Aug 17, 2026
Aug 7, 2026Slessor MikeCEO, Directoroption exercise141,792$0.00—576,494Aug 10, 2026
Aug 7, 2026Slessor MikeCEO, Directortax withholding78,908$117.39$9M497,586Aug 10, 2026
Aug 7, 2026Slessor MikeCEO, Directoroption exercise5,908$0.00—503,494Aug 10, 2026
Aug 7, 2026Slessor MikeCEO, Directortax withholding3,288$117.39$386K500,206Aug 10, 2026
Aug 6, 2026Slessor MikeCEO, Directoroption exercise6,031$0.00—438,059Aug 7, 2026
Aug 6, 2026Slessor MikeCEO, Directortax withholding3,357$115.21$387K434,702Aug 7, 2026
Aug 6, 2026McKinnis Aric BrendanCFO, SVP Global Financeoption exercise1,099$0.00—14,426Aug 7, 2026
Aug 6, 2026McKinnis Aric BrendanCFO, SVP Global Financetax withholding274$115.21$32K14,152Aug 7, 2026
Aug 5, 2026Slessor MikeCEO, Directoroption exercise3,644$0.00—434,056Aug 7, 2026
Aug 5, 2026Slessor MikeCEO, Directortax withholding2,028$114.44$232K432,028Aug 7, 2026
Aug 5, 2026McKinnis Aric BrendanCFO, SVP Global Financeoption exercise521$0.00—13,457Aug 7, 2026
Aug 5, 2026McKinnis Aric BrendanCFO, SVP Global Financetax withholding130$114.44$15K13,327Aug 7, 2026
Jul 15, 2026Slessor MikeCEO, Directoropen-market sale10b5-11,041$116.56$121K434,106Jul 16, 2026
Jul 15, 2026Slessor MikeCEO, Directoropen-market sale10b5-11,650$117.39$194K432,456Jul 16, 2026
Jul 15, 2026Slessor MikeCEO, Directoropen-market sale10b5-1706$118.21$83K431,750Jul 16, 2026
Jul 15, 2026Slessor MikeCEO, Directoropen-market sale10b5-1170$119.08$20K431,580Jul 16, 2026
Jul 15, 2026Slessor MikeCEO, Directoropen-market sale10b5-1300$120.58$36K431,280Jul 16, 2026
Jul 15, 2026Slessor MikeCEO, Directoropen-market sale10b5-1868$121.30$105K430,412Jul 16, 2026
Jun 16, 2026St Dennis ThomasDirectorgift740$0.00—28,333Jun 16, 2026
Jun 15, 2026St Dennis ThomasDirectoropen-market sale2,800$151.49$424K29,073Jun 16, 2026
Jun 10, 2026Slessor MikeCEO, Directoropen-market sale10b5-11,399$117.70$165K445,638Jun 11, 2026
Jun 10, 2026Slessor MikeCEO, Directoropen-market sale10b5-1767$119.00$91K444,871Jun 11, 2026
Jun 10, 2026Slessor MikeCEO, Directoropen-market sale10b5-1400$119.46$48K444,471Jun 11, 2026
Jun 10, 2026Slessor MikeCEO, Directoropen-market sale10b5-1975$121.00$118K443,496Jun 11, 2026
Jun 10, 2026Slessor MikeCEO, Directoropen-market sale10b5-14,220$121.72$514K439,276Jun 11, 2026
Jun 10, 2026Slessor MikeCEO, Directoropen-market sale10b5-12,500$122.63$307K436,776Jun 11, 2026
Jun 10, 2026Slessor MikeCEO, Directoropen-market sale10b5-11,629$123.37$201K435,147Jun 11, 2026
Jun 2, 2026McKinnis Aric BrendanCFO, SVP Global Financeoption exercise773$0.00—13,129Jun 4, 2026
Jun 2, 2026McKinnis Aric BrendanCFO, SVP Global Financetax withholding193$125.11$24K12,936Jun 4, 2026
Jun 2, 2026Rhodes SheriDirectoropen-market sale6,328$125.40$794K5,375Jun 4, 2026
May 21, 2026Obregon-Jimenez RebecaDirectoropen-market sale3,828$126.47$484K7,875May 22, 2026
May 20, 2026White Brian CDirectoropen-market sale3,250$126.00$410K8,653May 21, 2026
May 19, 2026St Dennis ThomasDirectoropen-market sale1,000$115.84$116K31,873May 21, 2026
May 15, 2026St Dennis ThomasDirectoraward1,347$0.00—32,873May 19, 2026
May 15, 2026Obregon-Jimenez RebecaDirectoraward1,347$0.00—11,703May 19, 2026
May 15, 2026Rhodes SheriDirectoraward1,347$0.00—11,703May 19, 2026
May 15, 2026Steven-Waiss KelleyDirectoraward1,347$0.00—26,526May 19, 2026

Who the insiders are

Everyone who reported a transaction since November 9, 2024, by open-market value over twelve months. Shares held are after the insider’s latest directly held transaction.

InsiderRoleLast transactionKindShares heldBought, 12 monthsSold, 12 monthsSales under a plan
Slessor MikeCEO, DirectorOct 14, 2026open-market sale464,499—$16M (55)55 of 55
Rhodes SheriDirectorJun 2, 2026open-market sale5,375—$2M (2)0 of 2
St Dennis ThomasDirectorJun 16, 2026gift28,333—$1M (5)0 of 5
Steven-Waiss KelleyDirectorSep 3, 2026open-market sale24,426—$1M (4)0 of 4
White Brian CDirectorMay 20, 2026open-market sale8,653—$1M (3)0 of 3
Obregon-Jimenez RebecaDirectorMay 21, 2026open-market sale7,875—$750K (2)0 of 2
Titinger JorgeDirectorMay 15, 2026award14,836—$694K (2)0 of 2
McKinnis Aric BrendanCFO, SVP Global FinanceAug 6, 2026option exercise14,426—$313K (1)0 of 1
Brewer Kevin JDirectorFeb 11, 2026open-market sale8,105—$289K (1)0 of 1
Shahar ShaiCFO, SVP Global FinanceAug 7, 2025tax withholding55,968———

Questions

Are FormFactor Inc. insiders buying or selling?

Over the twelve months to November 9, 2026, 9 insiders at FormFactor Inc. sold $23M of stock in the open market, all by officers and directors, and no insider bought. Net, insiders sold $23M. Only open-market purchases and sales are counted.

Who sold the most FormFactor Inc. stock in the last year?

Slessor Mike (CEO, Director) sold $16M in 55 open-market sales over the twelve months to November 9, 2026.

Do FormFactor Inc. executives sell under 10b5-1 plans?

55 of the 75 open-market sales in the last twelve months (73%) were reported as made under a Rule 10b5-1 trading plan, set up in advance. A sale under a plan is still counted as a sale.

What counts as insider buying here?

Only open-market purchases (Form 4 code P) and sales (code S) by officers, directors and 10% owners. Stock awards, option exercises, shares withheld for tax and gifts are listed in the table but never counted as buying or selling.

More on FormFactor Inc.

From Form 4, 4/A and 5 filings with the SEC. A record of insider transactions, not a recommendation.