Ticker · CUSIP 346375108

FORM

FORMFACTOR INC
Technology·Semiconductor Equipment & Materials
···Share
Holders (tracked)
14
Combined shares
3,471,747
Combined value
$139.90M
Last close
$127.68
Quarter
2025Q4
Tracked holders · last 8 quarters
+3 vs previous quarter over the last 8.
14122024Q12025Q4
Price is +216.8% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

28 events
  1. SLESSOR MIKE · CEO
    2026-04-15
    Sold $113.9K @ $126.58
    Insider sell
  2. SLESSOR MIKE · CEO
    2026-04-15
    Sold $99.1K @ $129.22
    Insider sell
  3. SLESSOR MIKE · CEO
    2026-04-15
    Sold $302.4K @ $127.65
    Insider sell
  4. SLESSOR MIKE · CEO
    2026-04-15
    Sold $228.7K @ $125.24
    Insider sell
  5. SLESSOR MIKE · CEO
    2026-04-15
    Sold $698.3K @ $128.56
    Insider sell
  6. Paul Tudor Jones (Tudor Investment) opened position2026-02-17
    +50,741 shares · 2025Q4
    13F
  7. Ken Griffin (Citadel Advisors) added2026-02-17
    +87,099 shares · 2025Q4
    13F
  8. D.E. Shaw & Co. trimmed2026-02-17
    −448,752 shares · 2025Q4
    13F
  9. Two Sigma Investments trimmed2026-02-17
    −244,384 shares · 2025Q4
    13F
  10. Izzy Englander (Millennium Mgmt) trimmed2026-02-17
    −30,809 shares · 2025Q4
    13F
  11. Steve Cohen (Point72) added2026-02-17
    +314,971 shares · 2025Q4
    13F
  12. AQR Capital Management added2026-02-17
    +36,808 shares · 2025Q4
    13F
  13. T. Rowe Price added2026-02-17
    +308,826 shares · 2025Q4
    13F
  14. Ray Dalio (Bridgewater Associates) opened position2026-02-13
    +25,979 shares · 2025Q4
    13F
  15. Norges Bank (Norway SWF) opened position2026-02-10
    +563,841 shares · 2025Q4
    13F
  16. Ken Fisher (Fisher Asset Mgmt) added2026-02-09
    +293,746 shares · 2025Q4
    13F
  17. First Eagle Investment Management trimmed2026-02-04
    −31,947 shares · 2025Q4
    13F
  18. Steve Cohen (Point72) opened position2025-11-14
    +115,116 shares · 2025Q3
    13F
  19. Two Sigma Investments added2025-11-14
    +302,409 shares · 2025Q3
    13F
  20. Izzy Englander (Millennium Mgmt) added2025-11-14
    +88,429 shares · 2025Q3
    13F
  21. D.E. Shaw & Co. added2025-11-14
    +108,574 shares · 2025Q3
    13F
  22. T. Rowe Price added2025-11-14
    +564,928 shares · 2025Q3
    13F
  23. AQR Capital Management trimmed2025-11-14
    −26,538 shares · 2025Q3
    13F
  24. Renaissance Technologies exited2025-11-13
    −142,968 shares · 2025Q3
    13F
  25. Norges Bank (Norway SWF) exited2025-11-13
    −83,550 shares · 2025Q3
    13F
  26. Norges Bank (Norway SWF) trimmed2025-11-12
    −68,636 shares · 2024Q3
    13F
  27. Ken Fisher (Fisher Asset Mgmt) trimmed2025-11-12
    −8,940 shares · 2025Q3
    13F
  28. First Eagle Investment Management added2025-11-12
    +19,725 shares · 2025Q3
    13F

Insider activity

Last 30 days
Net (open-market)
−$1.44M
Buys
0 · $0
Sells
5 · $1.44M
Unique insiders
1
DateInsiderCodeSharesPriceValue
04-15SLESSOR MIKE
CEO · Officer, Director
S900$126.58$113.9K
04-15SLESSOR MIKE
CEO · Officer, Director
S767$129.22$99.1K
04-15SLESSOR MIKE
CEO · Officer, Director
S2,369$127.65$302.4K
04-15SLESSOR MIKE
CEO · Officer, Director
S1,826$125.24$228.7K
04-15SLESSOR MIKE
CEO · Officer, Director
S5,432$128.56$698.3K
View full insider history for FORM →
Follow-the-investor returns
If you'd copied each holder of FORM…
Cost basis inferred from 13F share-delta history. Sorted by % return on the position they're still holding.
InvestorFirst inCost basisReturnPosition value today
T. Rowe Price2017Q4$2.15+5843.9%$123.2M
First Eagle Investment Management2021Q2$32.69+290.5%$34.4M
D.E. Shaw & Co.2016Q1$35.01+264.7%$7.7M
Two Sigma Investments2016Q1$36.73+247.6%$14.5M
Izzy Englander (Millennium Mgmt)2016Q1$37.00+245.1%$10.5M
AQR Capital Management2016Q1$40.39+216.1%$26.1M
Paul Tudor Jones (Tudor Investment)2017Q1$46.20+176.4%$6.5M
Ken Fisher (Fisher Asset Mgmt)2016Q1$49.15+159.8%$55.7M
Steve Cohen (Point72)2017Q2$50.61+152.3%$54.9M
Norges Bank (Norway SWF)2016Q1$51.33+148.7%$72.0M
Ken Griffin (Citadel Advisors)2016Q2$52.77+142.0%$6.1M
Ken Griffin (Citadel Advisors)2016Q2$52.77+142.0%$6.1M
Ken Griffin (Citadel Advisors)2016Q2$52.77+142.0%$6.1M
Ray Dalio (Bridgewater Associates)2025Q4$55.78+128.9%$3.3M

Who moved on this name in 2025Q4

13F transactions reported for the latest quarter, grouped by direction.
New positions3
Added to5
Trimmed4
Exited0
—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
10
$33.50B
2022Q2
12
$30.17B
2022Q3
13
$19.5M
2022Q4
14
$378.2M
2023Q1
14
$503.1M
2023Q2
15
$548.5M
2023Q3
14
$489.5M
2023Q4
13
$580.8M
2024Q1
12
$666.3M
2024Q2
14
$873.6M
2024Q3
15
$115.3M
2024Q4
11
$48.6M
2025Q1
8
$28.9M
2025Q2
12
$51.3M
2025Q3
11
$70.7M
2025Q4
14
$139.9M

Who owns FORM

14 super-investors · 2025Q4
Tracked stake
3.47M
shares
Combined value
$140M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New3Added7Trim4
#ManagerSharesValue
1Norges Bank
Norway SWF
563.8K$31M
2Ken Fisher
Fisher Asset Mgmt
436.0K$24M
3Steve Cohen
Point72
430.1K$24M
4First Eagle Investment Management269.2K$15M
5AQR Capital Management204.8K$11M
6Ken Griffin
Citadel Advisors
193.0K$11M
7Two Sigma Investments113.8K$6M
8Izzy Englander
Millennium Mgmt
82.4K$5M
9D.E. Shaw & Co.60.1K$3M
10Paul Tudor Jones
Tudor Investment
50.7K$3M
11Ken Griffin
Citadel Advisors
48.0K$3M
12Ken Griffin
Citadel Advisors
29.3K$2M
13Ray Dalio
Bridgewater Associates
26.0K$1M
14T. Rowe Price964.6K$54K

Recent moves

20 transactions
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