Ticker · CUSIP 346375108

FORM

FORMFACTOR INC

Technology·Semiconductor Equipment & Materials

···Share

Holders (tracked)

Combined shares

3,471,747

Combined value

$193.65M

Last close

$137.21

Quarter

2025Q4

Price is +146.0% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$137.21+112.02 (+444.70%)H $137.21 · L $24.99 · Avg Vol 1.1M

Insider sell

Tracked holders · last 8 quarters

+3 vs previous quarter over the last 8.

SEC event timeline

28 events

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

Insider activity

Last 30 days

Net (open-market)

−$1.44M

Buys

0 · $0

Sells

5 · $1.44M

Unique insiders

Date	Insider	Code	Shares	Price	Value
04-15	SLESSOR MIKE CEO · Officer, Director	S	900	$126.58	$113.9K
04-15	SLESSOR MIKE CEO · Officer, Director	S	767	$129.22	$99.1K
04-15	SLESSOR MIKE CEO · Officer, Director	S	2,369	$127.65	$302.4K
04-15	SLESSOR MIKE CEO · Officer, Director	S	1,826	$125.24	$228.7K
04-15	SLESSOR MIKE CEO · Officer, Director	S	5,432	$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 each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
First Eagle Investment Management	2021Q2	$32.99	+315.9%	$36.9M
D.E. Shaw & Co.	2016Q1	$35.49	+286.6%	$8.2M
Two Sigma Investments	2016Q1	$36.78	+273.0%	$15.6M
Izzy Englander (Millennium Mgmt)	2016Q1	$37.56	+265.3%	$11.3M
AQR Capital Management	2016Q1	$40.39	+239.7%	$28.1M
T. Rowe Price	2017Q4	$42.36	+223.9%	$132.3M
Paul Tudor Jones (Tudor Investment)	2017Q1	$46.20	+197.0%	$7.0M
Ken Fisher (Fisher Asset Mgmt)	2016Q1	$49.70	+176.1%	$59.8M
Steve Cohen (Point72)	2017Q2	$50.61	+171.1%	$59.0M
Norges Bank (Norway SWF)	2016Q1	$51.33	+167.3%	$77.4M
Ken Griffin (Citadel Advisors)	2016Q2	$52.77	+160.0%	$6.6M
Ken Griffin (Citadel Advisors)	2016Q2	$52.77	+160.0%	$6.6M
Ken Griffin (Citadel Advisors)	2016Q2	$52.77	+160.0%	$6.6M
Ray Dalio (Bridgewater Associates)	2025Q4	$55.78	+146.0%	$3.6M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions3

Norges Bank (Norway SWF)
+563,841
$31.5M
Paul Tudor Jones (Tudor Investment)
+50,741
$2.8M
Ray Dalio (Bridgewater Associates)
+25,979
$1.4M

Added to5

Steve Cohen (Point72)
+314,971
$17.6M
Ken Fisher (Fisher Asset Mgmt)
+293,746
$16.4M
Ken Griffin (Citadel Advisors)
+87,099
$4.9M
AQR Capital Management
+36,808
$2.1M
T. Rowe Price
+308,826
$17K

Trimmed4

D.E. Shaw & Co.
−448,752
$25.0M
Two Sigma Investments
−244,384
$13.6M
First Eagle Investment Management
−31,947
$1.8M
Izzy Englander (Millennium Mgmt)
−30,809
$1.7M

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	10	17,131,145	$33.50B	—
2022Q2	12	16,879,856	$30.17B	+2
2022Q3	13	17,574,076	$440.2M	+1
2022Q4	14	18,371,306	$408.4M	+1
2023Q1	14	16,719,514	$532.5M	—
2023Q2	15	16,772,729	$574.0M	+1
2023Q3	14	14,526,860	$507.6M	-1
2023Q4	13	14,437,595	$602.2M	-1
2024Q1	12	15,118,243	$689.8M	-1
2024Q2	14	15,062,726	$911.7M	+2
2024Q3	15	3,052,001	$140.4M	+1
2024Q4	11	1,647,820	$72.5M	-4
2025Q1	8	1,567,368	$44.3M	-3
2025Q2	12	1,581,027	$54.4M	+4
2025Q3	11	2,595,828	$94.5M	-1
2025Q4	14	3,471,747	$193.7M	+3

Who owns FORM

14 super-investors · 2025Q4

Tracked stake

3.47M

Combined value

$194M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New3Added7Trim4

#	Manager	Shares	Value	% of book	Last action	8Q trend
1	T. Rowe Price	964.6K	$54M	0.0%	Added+308.8K
2	Norges Bank Norway SWF	563.8K	$31M	0.0%	New+563.8K
3	Ken Fisher Fisher Asset Mgmt	436.0K	$24M	0.0%	Added+293.7K
4	Steve Cohen Point72	430.1K	$24M	0.0%	Added+315.0K
5	First Eagle Investment Management	269.2K	$15M	0.0%	Trim−31.9K
6	AQR Capital Management	204.8K	$11M	0.0%	Added+36.8K
7	Ken Griffin Citadel Advisors	193.0K	$11M	0.0%	Added+87.1K
8	Two Sigma Investments	113.8K	$6M	0.0%	Trim−244.4K
9	Izzy Englander Millennium Mgmt	82.4K	$5M	0.0%	Trim−30.8K
10	D.E. Shaw & Co.	60.1K	$3M	0.0%	Trim−448.8K
11	Paul Tudor Jones Tudor Investment	50.7K	$3M	0.0%	New+50.7K
12	Ken Griffin Citadel Advisors	48.0K	$3M	0.0%	Added+87.1K
13	Ken Griffin Citadel Advisors	29.3K	$2M	0.0%	Added+87.1K
14	Ray Dalio Bridgewater Associates	26.0K	$1M	0.0%	New+26.0K	—

Recent moves

20 transactions

NEWPaul Tudor Jones (Tudor Investment)
+50,741 · 2025Q4
ADDKen Griffin (Citadel Advisors)
+87,099 · 2025Q4
ADDT. Rowe Price
+308,826 · 2025Q4
ADDAQR Capital Management
+36,808 · 2025Q4
ADDSteve Cohen (Point72)
+314,971 · 2025Q4
TRIMD.E. Shaw & Co.
−448,752 · 2025Q4
TRIMTwo Sigma Investments
−244,384 · 2025Q4
TRIMIzzy Englander (Millennium Mgmt)
−30,809 · 2025Q4
NEWRay Dalio (Bridgewater Associates)
+25,979 · 2025Q4
NEWNorges Bank (Norway SWF)
+563,841 · 2025Q4
ADDKen Fisher (Fisher Asset Mgmt)
+293,746 · 2025Q4
TRIMFirst Eagle Investment Management
−31,947 · 2025Q4
ADDIzzy Englander (Millennium Mgmt)
+88,429 · 2025Q3
NEWSteve Cohen (Point72)
+115,116 · 2025Q3
TRIMAQR Capital Management
−26,538 · 2025Q3
ADDTwo Sigma Investments
+302,409 · 2025Q3
ADDD.E. Shaw & Co.
+108,574 · 2025Q3
ADDT. Rowe Price
+564,928 · 2025Q3
SOLDNorges Bank (Norway SWF)
−83,550 · 2025Q3
SOLDRenaissance Technologies
−142,968 · 2025Q3

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