Ticker · CUSIP 82706C108

SIMO

ADR

SILICON MOTION TECHNOLOGY CO

Technology·Semiconductors

···Share

Holders (tracked)

Combined shares

1,717,539

Combined value

$159.22M

Last close

$139.71

Quarter

2025Q4

Price is +50.7% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$139.71+101.48 (+265.45%)H $143.01 · L $37.97 · Avg Vol 475K

Tracked holders · last 8 quarters

+2 vs previous quarter over the last 8.

SEC event timeline

18 events

Ken Griffin (Citadel Advisors) added2026-02-17
+60,305 shares · 2025Q4
Position
D.E. Shaw & Co. added2026-02-17
+23,470 shares · 2025Q4
Position
Two Sigma Investments added2026-02-17
+302,476 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2026-02-17
−66,158 shares · 2025Q4
Position
Steve Cohen (Point72) exited2026-02-17
−700,048 shares · 2025Q4
Position
Wellington Management added2026-02-17
+1,043 shares · 2025Q4
Position
Paul Tudor Jones (Tudor Investment) opened position2026-02-17
+2,500 shares · 2025Q4
Position
Mario Gabelli (GAMCO) trimmed2026-02-05
−4,029 shares · 2025Q4
Position
First Eagle Investment Management added2026-02-04
+3,032 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) added2025-11-14
+88,146 shares · 2025Q3
Position
Steve Cohen (Point72) trimmed2025-11-14
−364,354 shares · 2025Q3
Position
Two Sigma Investments added2025-11-14
+57,015 shares · 2025Q3
Position
D.E. Shaw & Co. trimmed2025-11-14
−23,927 shares · 2025Q3
Position
Wellington Management trimmed2025-11-14
−154,044 shares · 2025Q3
Position
Renaissance Technologies exited2025-11-13
−11,500 shares · 2025Q3
Position
Norges Bank (Norway SWF) added2025-11-12
+146,456 shares · 2024Q3
Position
Mario Gabelli (GAMCO) trimmed2025-11-12
−3,639 shares · 2025Q3
Position
First Eagle Investment Management added2025-11-12
+4,287 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for SIMO →

Follow-the-investor returns

If you'd copied each holder of SIMO…

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
Jeremy Grantham (GMO)	2016Q1	$65.34	+113.8%	$2.2M
Paul Tudor Jones (Tudor Investment)	2016Q2	$69.89	+99.9%	$349K
Wellington Management	2016Q1	$71.58	+95.2%	$97.4M
Mario Gabelli (GAMCO)	2023Q3	$72.60	+92.4%	$2.6M
First Eagle Investment Management	2025Q2	$76.06	+83.7%	$21.4M
Izzy Englander (Millennium Mgmt)	2016Q1	$77.12	+81.2%	$20.5M
D.E. Shaw & Co.	2016Q1	$77.52	+80.2%	$14.3M
Ken Griffin (Citadel Advisors)	2016Q1	$92.17	+51.6%	$18.6M
Ken Griffin (Citadel Advisors)	2016Q1	$92.17	+51.6%	$18.6M
Ken Griffin (Citadel Advisors)	2016Q1	$92.17	+51.6%	$18.6M
Two Sigma Investments	2016Q3	$92.68	+50.8%	$657K
Two Sigma Investments	2016Q3	$92.68	+50.8%	$657K
Two Sigma Investments	2016Q3	$92.68	+50.8%	$657K

Who moved on this name in 2025Q4

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

New positions1

Paul Tudor Jones (Tudor Investment)
+2,500
$232K

Added to5

Two Sigma Investments
+302,476
$28.0M
Ken Griffin (Citadel Advisors)
+60,305
$5.6M
D.E. Shaw & Co.
+23,470
$2.2M
First Eagle Investment Management
+3,032
$281K
Wellington Management
+1,043
$97K

Trimmed2

Izzy Englander (Millennium Mgmt)
−66,158
$6.1M
Mario Gabelli (GAMCO)
−4,029
$373K

Exited1

Steve Cohen (Point72)
−700,048
$66.4M

Institutional ownership over time

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

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	12	2,916,226	$194.9M	—
2022Q2	9	2,526,800	$211.5M	-3
2022Q3	12	2,724,376	$177.6M	+3
2022Q4	11	2,696,941	$175.3M	-1
2023Q1	9	2,429,249	$159.2M	-2
2023Q2	14	3,277,189	$235.5M	+5
2023Q3	14	2,170,155	$111.2M	—
2023Q4	10	2,104,262	$128.9M	-4
2024Q1	10	2,767,081	$212.9M	—
2024Q2	13	2,739,731	$221.9M	+3
2024Q3	11	2,586,482	$157.1M	-2
2024Q4	10	1,462,317	$79.0M	-1
2025Q1	10	1,400,988	$70.8M	—
2025Q2	13	2,524,519	$189.8M	+3
2025Q3	11	2,083,048	$197.5M	-2
2025Q4	13	1,717,539	$159.2M	+2

Who owns SIMO

13 super-investors · 2025Q4

Tracked stake

1.72M

Combined value

$159M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New1Added9Trim2Held1

#	Manager	Shares	Value	% of book	Last action
1	Wellington Management	697.0K	$65M	0.0%	Added+1.0K
2	Two Sigma Investments	379.8K	$35M	0.0%	Added+302.5K
3	First Eagle Investment Management	153.5K	$14M	0.0%	Added+3.0K
4	Izzy Englander Millennium Mgmt	147.0K	$14M	0.0%	Trim−66.2K
5	Ken Griffin Citadel Advisors	133.1K	$12M	0.0%	Added+60.3K
6	D.E. Shaw & Co.	102.0K	$9M	0.0%	Added+23.5K
7	Ken Griffin Citadel Advisors	32.7K	$3M	0.0%	Added+60.3K
8	Ken Griffin Citadel Advisors	27.7K	$3M	0.0%	Added+60.3K
9	Mario Gabelli GAMCO	18.6K	$2M	0.0%	Trim−4.0K
10	Jeremy Grantham GMO	16.1K	$1M	0.0%	Held
11	Two Sigma Investments	4.7K	$436K	0.0%	Added+302.5K
12	Two Sigma Investments	2.8K	$260K	0.0%	Added+302.5K
13	Paul Tudor Jones Tudor Investment	2.5K	$232K	0.0%	New+2.5K

Recent moves

20 transactions

SOLDSteve Cohen (Point72)
−700,048 · 2025Q4
TRIMIzzy Englander (Millennium Mgmt)
−66,158 · 2025Q4
ADDKen Griffin (Citadel Advisors)
+60,305 · 2025Q4
ADDTwo Sigma Investments
+302,476 · 2025Q4
ADDD.E. Shaw & Co.
+23,470 · 2025Q4
NEWPaul Tudor Jones (Tudor Investment)
+2,500 · 2025Q4
ADDWellington Management
+1,043 · 2025Q4
TRIMMario Gabelli (GAMCO)
−4,029 · 2025Q4
ADDFirst Eagle Investment Management
+3,032 · 2025Q4
TRIMSteve Cohen (Point72)
−364,354 · 2025Q3
ADDIzzy Englander (Millennium Mgmt)
+88,146 · 2025Q3
TRIMWellington Management
−154,044 · 2025Q3
ADDTwo Sigma Investments
+57,015 · 2025Q3
TRIMD.E. Shaw & Co.
−23,927 · 2025Q3
SOLDRenaissance Technologies
−11,500 · 2025Q3
ADDFirst Eagle Investment Management
+4,287 · 2025Q3
TRIMMario Gabelli (GAMCO)
−3,639 · 2025Q3
ADDNorges Bank (Norway SWF)
+146,456 · 2024Q3
ADDSteve Cohen (Point72)
+963,941 · 2025Q2
TRIMTwo Sigma Investments
−70,678 · 2025Q2

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