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FORM Insider Trading

Insider Ownership Percentage: 0.79%
Insider Buying (Last 12 Months): $0.00
Insider Selling (Last 12 Months): $11,443,796.21

FormFactor Insider Trading History Chart

This chart shows the insider buying and selling history at FormFactor by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

FormFactor Share Price & Price History

Current Price: $151.40
Price Change: ▲ Price Increase of +3.53 (2.39%)
As of 05/11/2026 04:00 PM ET

This chart shows the closing price history over time for FORM up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

FormFactor Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
4/15/2026Mike SlessorCEOSell11,294$127.72$1,442,469.68449,565View SEC Filing Icon  
3/18/2026Mike SlessorCEOSell10,227$95.15$973,099.05460,859View SEC Filing Icon  
3/5/2026Aric Brendan MckinnisCFOSell3,462$90.42$313,034.0411,140View SEC Filing Icon  
2/24/2026Brian C. WhiteDirectorSell2,300$100.01$230,023.0010,556View SEC Filing Icon  
2/18/2026Mike SlessorCEOSell8,664$94.14$815,628.96471,086View SEC Filing Icon  
2/11/2026Kevin J. BrewerDirectorSell3,000$96.20$288,600.008,105View SEC Filing Icon  
2/10/2026Thomas St. DennisDirectorSell7,431$93.84$697,325.0431,526View SEC Filing Icon  
2/10/2026Kelley Steven-WaissDirectorSell2,200$93.70$206,140.0030,579View SEC Filing Icon  
2/10/2026Sheri RhodesDirectorSell7,634$92.61$706,984.7410,356View SEC Filing Icon  
2/9/2026Brian C. WhiteDirectorSell5,500$90.95$500,225.0012,856View SEC Filing Icon  
2/9/2026Rebeca Obregon-JimenezDirectorSell2,770$95.82$265,421.4010,356View SEC Filing Icon  
1/15/2026Mike SlessorCEOSell13,088$76.81$1,005,289.28472,907View SEC Filing Icon  
1/6/2026Mike SlessorCEOSell39,606$65.00$2,574,390.00485,995View SEC Filing Icon  
12/17/2025Mike SlessorCEOSell7,669$56.36$432,224.84525,601View SEC Filing Icon  
12/2/2025Kelley Steven-WaissDirectorSell2,700$55.97$151,119.0032,779View SEC Filing Icon  
11/19/2025Mike SlessorCEOSell8,403$50.06$420,654.18533,270View SEC Filing Icon  
11/17/2025Thomas St. DennisDirectorSell2,000$49.85$99,700.0038,957View SEC Filing Icon  
9/12/2025Kelley Steven-WaissDirectorSell3,600$30.43$109,548.0035,479View SEC Filing Icon  
8/13/2025Rebeca Obregon-JimenezDirectorSell4,000$29.55$118,200.0013,126View SEC Filing Icon  
5/29/2025Thomas St. DennisDirectorSell3,000$31.24$93,720.0040,957View SEC Filing Icon  
5/1/2025Mike SlessorCEOSell4,000$31.72$126,880.00510,650View SEC Filing Icon  
4/1/2025Mike SlessorCEOSell4,000$28.24$112,960.00514,650View SEC Filing Icon  
2/3/2025Mike SlessorCEOSell4,000$38.98$155,920.00518,531View SEC Filing Icon  
1/2/2025Mike SlessorCEOSell4,000$44.44$177,760.00522,531View SEC Filing Icon  
12/2/2024Mike SlessorCEOSell4,000$40.59$162,360.00526,531View SEC Filing Icon  
10/1/2024Mike SlessorCEOSell4,000$45.28$181,120.00530,276View SEC Filing Icon  
9/3/2024Mike SlessorCEOSell4,000$46.31$185,240.00534,276View SEC Filing Icon  
8/6/2024Jorge TitingerDirectorSell6,770$41.94$283,933.8012,970View SEC Filing Icon  
8/1/2024Mike SlessorCEOSell4,000$50.93$203,720.00523,187View SEC Filing Icon  
7/1/2024Mike SlessorCEOSell4,000$59.00$236,000.00487,581View SEC Filing Icon  
5/28/2024Rebeca Obregon-JimenezDirectorSell4,833$57.59$278,332.4710,598View SEC Filing Icon  
5/20/2024Brian C. WhiteDirectorSell3,290$57.00$187,530.0011,828View SEC Filing Icon  
5/10/2024Thomas St. DennisDirectorSell2,000$56.30$112,600.0036,701View SEC Filing Icon  
5/7/2024Shai ShaharCFOSell6,094$55.76$339,801.4415,669View SEC Filing Icon  
5/7/2024Sheri RhodesDirectorSell13,319$56.02$746,130.387,634View SEC Filing Icon  
5/1/2024Mike SlessorCEOSell4,000$43.75$175,000.00491,781View SEC Filing Icon  
4/1/2024Mike SlessorCEOSell4,000$45.94$183,760.00495,781View SEC Filing Icon  
3/4/2024Shai ShaharCFOSell10,000$44.51$445,100.0027,591View SEC Filing Icon  
3/1/2024Mike SlessorCEOSell4,000$43.38$173,520.00499,781View SEC Filing Icon  
2/12/2024Shai ShaharCFOSell10,000$42.12$421,200.0067,141View SEC Filing Icon  
12/1/2023Rebeca Obregon-JimenezDirectorSell8,490$37.51$318,459.9011,603View SEC Filing Icon  
11/20/2023Shai ShaharCFOSell16,618$39.49$656,244.8277,941View SEC Filing Icon  
11/14/2023Thomas St. DennisDirectorSell3,792$38.24$145,006.0838,701View SEC Filing Icon  
11/9/2023Shai ShaharCFOSell10,986$35.02$384,729.72107,933View SEC Filing Icon  
See Full Table

SEC Filings (Institutional Ownership Changes) for FormFactor (NASDAQ:FORM)

98.76% of FormFactor stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at FORM by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

FormFactor Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
5/8/2026PNC Financial Services Group Inc.7,067$0.69M0.0%-24.3%0.009%Search for SEC Filing on Google Icon
5/8/2026Madison Asset Management LLC24,107$2.34M0.0%-74.8%0.031%Search for SEC Filing on Google Icon
5/8/2026Summit Global Investments6,063$0.59M0.0%N/A0.008%Search for SEC Filing on Google Icon
5/7/2026Meeder Advisory Services Inc.3,462$0.34M0.0%N/A0.004%Search for SEC Filing on Google Icon
5/7/2026Dimensional Fund Advisors LP1,412,119$136.94M0.0%-18.0%1.812%Search for SEC Filing on Google Icon
5/7/2026Parallel Advisors LLC6,381$0.62M0.0%+1,077.3%0.008%Search for SEC Filing on Google Icon
5/7/2026Swiss National Bank153,400$14.88M0.0%+0.9%0.197%Search for SEC Filing on Google Icon
5/7/2026Hanseatic Management Services Inc.13,750$1.33M1.3%N/A0.018%Search for SEC Filing on Google Icon
5/6/2026California Public Employees Retirement System116,977$11.35M0.0%N/A0.150%Search for SEC Filing on Google Icon
5/6/2026Bessemer Group Inc.391,959$38.02M0.1%-30.3%0.503%Search for SEC Filing on Google Icon
5/6/2026Allspring Global Investments Holdings LLC83,511$8.43M0.0%-47.5%0.107%Search for SEC Filing on Google Icon
5/5/2026Bank of New York Mellon Corp633,543$61.45M0.0%-15.7%0.813%Search for SEC Filing on Google Icon
5/5/2026Illinois Municipal Retirement Fund42,683$4.14M0.1%+10.0%0.055%Search for SEC Filing on Google Icon
5/5/2026Sanctuary Advisors LLC13,181$1.28M0.0%-27.3%0.017%Search for SEC Filing on Google Icon
5/5/2026Maryland State Retirement & Pension System11,307$1.10M0.0%-0.7%0.015%Search for SEC Filing on Google Icon
5/5/2026Hillsdale Investment Management Inc.61,710$5.99M0.2%+43,978.6%0.079%Search for SEC Filing on Google Icon
5/4/2026Calamos Advisors LLC30,909$3M0.0%N/A0.040%Search for SEC Filing on Google Icon
5/4/2026Archer Investment Corp3,171$0.31M0.1%N/A0.004%Search for SEC Filing on Google Icon
5/4/2026Principal Financial Group Inc.378,495$36.71M0.0%+2.2%0.486%Search for SEC Filing on Google Icon
5/1/2026Fifth Third Bancorp66,370$6.44M0.0%+184.1%0.085%Search for SEC Filing on Google Icon
5/1/2026Sequoia Financial Advisors LLC2,786$0.27M0.0%N/A0.004%Search for SEC Filing on Google Icon
4/30/2026Hsbc Holdings PLC24,881$2.41M0.0%N/A0.032%Search for SEC Filing on Google Icon
4/29/2026Sage Rhino Capital LLC2,474$0.24M0.0%N/A0.003%Search for SEC Filing on Google Icon
4/28/2026Abel Hall LLC5,897$0.57M0.1%+14.1%0.008%Search for SEC Filing on Google Icon
4/28/2026Praxis Investment Management Inc.3,694$0.36M0.0%-63.8%0.005%Search for SEC Filing on Google Icon
4/27/2026New York State Teachers Retirement System33,813$3.28M0.0%+86.4%0.043%Search for SEC Filing on Google Icon
4/27/2026Leonteq Securities AG2,000$0.19M0.0%N/A0.003%Search for SEC Filing on Google Icon
4/25/2026Strs Ohio19,100$1.85M0.0%+63.2%0.025%Search for SEC Filing on Google Icon
4/25/2026Keybank National Association OH2,331$0.23M0.0%-70.4%0.003%Search for SEC Filing on Google Icon
4/24/2026Peregrine Capital Management LLC131,096$12.72M0.5%-27.8%0.168%Search for SEC Filing on Google Icon
4/24/2026Impact Partnership Wealth LLC2,849$0.28M0.0%-57.9%0.004%Search for SEC Filing on Google Icon
4/23/2026Inspire Investing LLC5,321$0.52M0.0%-36.5%0.007%Search for SEC Filing on Google Icon
4/22/2026Janney Montgomery Scott LLC13,816$1.34M0.0%-41.9%0.018%Search for SEC Filing on Google Icon
4/22/2026Pictet Asset Management Holding SA12,303$1.19M0.0%+13.1%0.016%Search for SEC Filing on Google Icon
4/22/2026Sterling Capital Management LLC1,030$100K0.0%-31.8%0.001%Search for SEC Filing on Google Icon
4/21/2026Decker Retirement Planning Inc.38,348$3.72M1.7%N/A0.049%Search for SEC Filing on Google Icon
4/21/2026Louisiana State Employees Retirement System34,400$3.34M0.1%N/A0.044%Search for SEC Filing on Google Icon
4/21/2026Triangle Securities Wealth Management2,442$0.24M0.1%N/A0.003%Search for SEC Filing on Google Icon
4/21/2026Silver Oak Securities Incorporated4,055$0.39M0.0%N/A0.005%Search for SEC Filing on Google Icon
4/20/2026Blue Trust Inc.10,542$1.02M0.0%+1.9%0.014%Search for SEC Filing on Google Icon
4/20/2026Fifth Third Wealth Advisors LLC2,580$0.25M0.0%N/A0.003%Search for SEC Filing on Google Icon
4/20/2026Assenagon Asset Management S.A.422,827$41.01M0.1%-24.9%0.542%Search for SEC Filing on Google Icon
4/17/2026Krilogy Financial LLC2,375$0.23M0.0%N/A0.003%Search for SEC Filing on Google Icon
3/17/2026Rockefeller Capital Management L.P.4,622$0.26M0.0%+23.9%0.006%Search for SEC Filing on Google Icon
3/9/2026Corient Private Wealth LLC4,389$0.25M0.0%-22.1%0.006%Search for SEC Filing on Google Icon
2/23/2026Virtu Financial LLC7,115$0.40M0.0%N/A0.009%Search for SEC Filing on Google Icon
2/19/2026T. Rowe Price Investment Management Inc.359,479$20.05M0.0%+210,121.6%0.464%Search for SEC Filing on Google Icon
2/19/2026Invesco Ltd.332,927$18.57M0.0%+6.4%0.429%Search for SEC Filing on Google Icon
2/19/2026Corient Private Wealth LLC4,178$0.23M0.0%-25.8%0.005%Search for SEC Filing on Google Icon
2/18/2026Mercer Global Advisors Inc. ADV7,509$0.42M0.0%+2.1%0.010%Search for SEC Filing on Google Icon
2/18/2026Vident Advisory LLC4,523$0.25M0.0%-19.5%0.006%Search for SEC Filing on Google Icon
2/18/2026State of Tennessee Department of Treasury34,275$1.91M0.0%+43.7%0.044%Search for SEC Filing on Google Icon
2/18/2026Mackenzie Financial Corp7,581$0.43M0.0%N/A0.010%Search for SEC Filing on Google Icon
2/18/2026Regal Partners Ltd10,000$0.56M0.0%N/A0.013%Search for SEC Filing on Google Icon
2/18/2026Fuller & Thaler Asset Management Inc.1,084,528$60.50M0.2%N/A1.399%Search for SEC Filing on Google Icon
2/18/2026Sunstone Asset Management L.P.15,409$0.86M0.8%N/A0.020%Search for SEC Filing on Google Icon
2/18/2026Zacks Investment Management4,315$0.24M0.0%N/A0.006%Search for SEC Filing on Google Icon
2/18/2026VARCOV Co.6,547$0.37M0.1%N/A0.008%Search for SEC Filing on Google Icon
2/18/2026Voloridge Investment Management LLC323,429$18.04M0.1%-16.7%0.417%Search for SEC Filing on Google Icon
2/18/2026Tudor Investment Corp ET AL50,741$2.83M0.0%N/A0.065%Search for SEC Filing on Google Icon
2/18/2026Twinbeech Capital LP21,200$1.18M0.1%N/A0.027%Search for SEC Filing on Google Icon
2/18/2026Sora Investors LLC60,699$3.39M0.3%-46.5%0.078%Search for SEC Filing on Google Icon
2/18/2026Polymer Capital Management US LLC35,319$1.97M0.2%-71.1%0.046%Search for SEC Filing on Google Icon
2/18/2026Millennium Management LLC82,369$4.60M0.0%-27.2%0.106%Search for SEC Filing on Google Icon
2/18/2026Man Group plc7,516$0.42M0.0%N/A0.010%Search for SEC Filing on Google Icon
2/18/2026Inspire Investing LLC8,380$0.47M0.0%-33.3%0.011%Search for SEC Filing on Google Icon
2/18/2026CastleKnight Management LP27,800$1.55M0.0%N/A0.036%Search for SEC Filing on Google Icon
2/18/2026Boothbay Fund Management LLC4,851$0.27M0.0%N/A0.006%Search for SEC Filing on Google Icon
2/17/2026Guggenheim Capital LLC22,656$1.26M0.0%+44.5%0.029%Search for SEC Filing on Google Icon
2/17/2026Schonfeld Strategic Advisors LLC15,509$0.87M0.0%-4.8%0.020%Search for SEC Filing on Google Icon
2/17/2026PDT Partners LLC51,112$2.85M0.2%-28.2%0.066%Search for SEC Filing on Google Icon
2/17/2026AQR Capital Management LLC204,768$11.42M0.0%+21.9%0.264%Search for SEC Filing on Google Icon
2/17/2026Abel Hall LLC5,169$0.29M0.1%N/A0.007%Search for SEC Filing on Google Icon
2/17/2026Cetera Investment Advisers40,980$2.29M0.0%-2.5%0.053%Search for SEC Filing on Google Icon
2/17/2026Cim Investment Management Inc.4,578$0.26M0.1%N/A0.006%Search for SEC Filing on Google Icon
2/17/2026Sandler Capital Management26,019$1.45M0.5%N/A0.034%Search for SEC Filing on Google Icon
2/17/2026Trexquant Investment LP87,107$4.86M0.0%N/A0.112%Search for SEC Filing on Google Icon
2/17/2026Amundi7,447$0.42M0.0%N/A0.010%Search for SEC Filing on Google Icon
2/17/2026Sciencast Management LP4,710$0.26M0.0%N/A0.006%Search for SEC Filing on Google Icon
2/17/2026Price T Rowe Associates Inc. MD964,578$53.81M0.0%+47.1%1.244%Search for SEC Filing on Google Icon
2/17/2026T. Rowe Price Investment Management Inc.144,346$8.05M0.0%+84,312.9%0.186%Search for SEC Filing on Google Icon
2/17/2026Osaic Holdings Inc.3,650$0.20M0.0%+34.2%0.005%Search for SEC Filing on Google Icon
2/17/2026California State Teachers Retirement System73,300$4.09M0.0%+2.4%0.095%Search for SEC Filing on Google Icon
2/17/2026Russell Investments Group Ltd.44,548$2.49M0.0%+4.9%0.057%Search for SEC Filing on Google Icon
2/17/2026Maryland State Retirement & Pension System11,385$0.64M0.0%+2.7%0.015%Search for SEC Filing on Google Icon
2/17/2026State of Wisconsin Investment Board73,385$4.09M0.0%-11.6%0.095%Search for SEC Filing on Google Icon
2/17/2026Kemnay Advisory Services Inc.4,081$0.23M0.0%N/A0.005%Search for SEC Filing on Google Icon
2/17/2026Captrust Financial Advisors10,089$0.56M0.0%+21.0%0.013%Search for SEC Filing on Google Icon
2/17/2026&PARTNERS31,645$1.77M0.0%-6.9%0.041%Search for SEC Filing on Google Icon
2/17/2026ExodusPoint Capital Management LP84,215$4.70M0.0%N/A0.109%Search for SEC Filing on Google Icon
2/17/2026Royal Bank of Canada586,649$32.72M0.0%-31.9%0.757%Search for SEC Filing on Google Icon
2/17/2026Magnetar Financial LLC72,739$4.06M0.0%N/A0.094%Search for SEC Filing on Google Icon
2/17/2026Needham Investment Management LLC694,500$38.74M2.4%-6.1%0.896%Search for SEC Filing on Google Icon
2/16/2026Squarepoint Ops LLC17,027$0.95M0.0%-94.3%0.022%Search for SEC Filing on Google Icon
2/16/2026Vanguard Personalized Indexing Management LLC10,033$0.56M0.0%+9.1%0.013%Search for SEC Filing on Google Icon
2/16/2026Verition Fund Management LLC38,775$2.16M0.0%-7.8%0.050%Search for SEC Filing on Google Icon
2/16/2026MML Investors Services LLC4,768$0.27M0.0%N/A0.006%Search for SEC Filing on Google Icon
2/16/2026Mariner LLC23,916$1.33M0.0%-6.9%0.031%Search for SEC Filing on Google Icon
2/16/2026Fieldview Capital Management LLC3,733$0.21M0.0%N/A0.005%Search for SEC Filing on Google Icon
2/16/2026Healthcare of Ontario Pension Plan Trust Fund171,055$9.54M0.0%+225.8%0.221%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
FormFactor logo
FormFactor, Inc. designs, manufactures, and sells probe cards, analytical probes, probe stations, metrology systems, thermal systems, and cryogenic systems to semiconductor companies and scientific institutions in the United States, Taiwan, South Korea, China, Europe, Japan, Malaysia, Singapore, and internationally. It operates in two segments, Probe Cards and Systems. The company offers probe cards to test various semiconductor device types, including systems on a chip products, mobile application processors, microprocessors, microcontrollers, and graphic processors, as well as radio frequency, analog, mixed signal, image sensor, electro-optical, dynamic random access memory, NAND flash memory, and NOR flash memory devices, as well as computer processor devices; and analytical probes, which are used for a range of applications, including device characterization, electrical simulation model development, failure analysis, and prototype design debugging for universities, research institutions, semiconductor integrated device manufacturers, semiconductor foundries, and fabless semiconductor companies. It also provides probe systems for semiconductor design engineers to capture and analyze accurate data; surface metrology systems for the development, production, and quality control of semiconductor products; thermal subsystems, such as thermal chucks and other test systems used in probe stations and other applications; and precision cryogenic instruments, semiconductor tests, and measurement systems. In addition, the company offers on-site probe card maintenance and service training, seminars, and telephone support services. It markets and sells its products through direct sales force, manufacturers' representatives, and distributors. The company was incorporated in 1993 and is headquartered in Livermore, California.
Read More on FormFactor

Today's Range

Now: $151.40
Low: $139.29
High: $157.63

50 Day Range

MA: $114.51
Low: $85.01
High: $155.08

52 Week Range

Now: $151.40
Low: $26.08
High: $159.09

Volume

3,801,011 shs

Average Volume

2,164,477 shs

Market Capitalization

$11.80 billion

P/E Ratio

174.02

Dividend Yield

N/A

Beta

1.32

Who are the company insiders with the largest holdings of FormFactor?

FormFactor's top insider investors include:
  1. Mike Slessor (CEO)
  2. Michael M Ludwig (CFO)
  3. Dennis Thomas St (Director)
  4. Mike Slessor (President)
  5. Shai Shahar (CFO)
  6. Dennis Thomas St (CEO)
  7. Richard Delateur (Director)
  8. Michael Ludwig (CFO)
  9. Michael W Zellner (Director)
  10. Stuart Merkadeau (SVP)
Learn More about top insider investors at FormFactor.

Who are the major institutional investors of FormFactor?

FormFactor's top institutional investors include:
  1. Dimensional Fund Advisors LP — 1.81%
  2. Bank of New York Mellon Corp — 0.81%
  3. Assenagon Asset Management S.A. — 0.54%
  4. Bessemer Group Inc. — 0.50%
  5. Principal Financial Group Inc. — 0.49%
  6. Swiss National Bank — 0.20%
Learn More about top institutional investors of FormFactor stock.

Which major investors are selling FormFactor stock?

During the last quarter, FORM stock was sold by these institutional investors:
  1. Dimensional Fund Advisors LP
  2. Bessemer Group Inc.
  3. Assenagon Asset Management S.A.
  4. Bank of New York Mellon Corp
  5. Allspring Global Investments Holdings LLC
  6. Madison Asset Management LLC
  7. Peregrine Capital Management LLC
  8. Janney Montgomery Scott LLC
In the last year, company insiders that have sold FormFactor company stock include:
  1. Mike Slessor (CEO)
  2. Dennis Thomas St (Director)
  3. Kelley Steven-Waiss (Director)
  4. Rebeca Obregon-Jimenez (Director)
  5. Brian C White (Director)
  6. Aric Brendan Mckinnis (CFO)
  7. Sheri Rhodes (Director)
  8. Kevin J Brewer (Director)
Learn More investors selling FormFactor stock.

Which major investors are buying FormFactor stock?

During the previous quarter, FORM stock was purchased by institutional investors including:
  1. California Public Employees Retirement System
  2. Hillsdale Investment Management Inc.
  3. Fifth Third Bancorp
  4. Decker Retirement Planning Inc.
  5. Louisiana State Employees Retirement System
  6. Calamos Advisors LLC
  7. Hsbc Holdings PLC
  8. New York State Teachers Retirement System

FormFactor Active Insiders

Mike Slessor
Mike Slessor (Age 55)
CEO, President & Director
7 recent trades
Aric Brendan Mckinnis
Aric Brendan Mckinnis
Senior Vice President and Chief Financial Officer
1 recent trades
Shai Shahar
Shai Shahar (Age 54)
CFO
Sheri Rhodes
Sheri Rhodes (Age 56)
Director
1 recent trades
Kelley Steven-Waiss
Kelley Steven-Waiss
Director
2 recent trades
Rebeca Obregon-Jimenez
Director
1 recent trades
Dennis Thomas St
Dennis Thomas St
Director
2 recent trades
Jorge Titinger
Jorge Titinger
Director
Brian C White
Director
2 recent trades
Kevin J Brewer
Kevin J Brewer
Director
1 recent trades