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Allegro MicroSystems
ALGM

Overview Fund Activity

289 hedge funds and large institutions have $3.93B invested in Allegro MicroSystems in 2025 Q1 according to their latest regulatory filings, with 71 funds opening new positions, 104 increasing their positions, 80 reducing their positions, and 34 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
289
Holders Change
+35
Holders Change %
+13.78%
% of All Funds
3.93%
Holding in Top 10
5
Holding in Top 10 Change
+3
Holding in Top 10 Change %
+150%
% of All Funds
0.07%
New
71
Increased
104
Reduced
80
Closed
34
Calls
$38.2M
Puts
$78.8M
Net Calls
-$40.6M
Net Calls Change
-$53.4M

Top Buyers

1
Capital Research Global Investors
Capital Research Global Investors
California
+$133M
2
Fidelity Investments
Fidelity Investments
Massachusetts
+$104M
3
FCM
Frontier Capital Management
Massachusetts
+$70.8M
4
Citadel Advisors
Citadel Advisors
Florida
+$69.3M
5
Invesco
Invesco
Georgia
+$69M

Top Sellers

1
Westfield Capital Management
Westfield Capital Management
Massachusetts
-$48.9M
2
WP
Woodline Partners
California
-$45.6M
3
JPMorgan Chase & Co
JPMorgan Chase & Co
New York
-$38.6M
4
PP
Paloma Partners
Connecticut
-$35.1M
5
Two Sigma Investments
Two Sigma Investments
New York
-$33.3M
Name Holding Trade Value Shares
Change 		Shares
Change %
Fidelity Investments
1
Fidelity Investments
Massachusetts
$677M +$104M +4,146,625 +18%
Vanguard Group
2
Vanguard Group
Pennsylvania
$354M +$429K +17,070 +0.1%
BlackRock
3
BlackRock
New York
$293M -$2.16M -86,050 -0.7%
Capital Research Global Investors
4
Capital Research Global Investors
California
$278M +$133M +5,294,593 +92%
JPMorgan Chase & Co
5
JPMorgan Chase & Co
New York
$226M -$38.6M -1,535,701 -15%
State Street
6
State Street
Massachusetts
$128M -$19.9M -792,883 -13%
Invesco
7
Invesco
Georgia
$122M +$69M +2,746,880 +132%
Citadel Advisors
8
Citadel Advisors
Florida
$109M +$69.3M +2,758,171 +175%
Wellington Management Group
9
Wellington Management Group
Massachusetts
$81.6M -$18.7M -744,792 -19%
ClearBridge Investments
10
ClearBridge Investments
New York
$79.5M -$5.61M -223,410 -7%
FCM
11
Frontier Capital Management
Massachusetts
$73.1M +$70.8M +2,818,543 +3,091%
Morgan Stanley
12
Morgan Stanley
New York
$66.6M -$212K -8,427 -0.3%
Macquarie Group
13
Macquarie Group
Australia
$66.2M +$29.1M +1,157,239 +78%
Principal Financial Group
14
Principal Financial Group
Iowa
$60.7M +$3.64M +144,824 +6%
Millennium Management
15
Millennium Management
New York
$60.4M +$27.1M +1,078,025 +81%
Geode Capital Management
16
Geode Capital Management
Massachusetts
$60M +$591K +23,502 +1%
Balyasny Asset Management
17
Balyasny Asset Management
Illinois
$58.5M +$44.2M +1,759,343 +310%
SPPAM
18
Summit Partners Public Asset Management
Massachusetts
$57.1M +$34.6M +1,377,600 +154%
Adage Capital Partners
19
Adage Capital Partners
Massachusetts
$53M -$15.7M -625,137 -23%
Dimensional Fund Advisors
20
Dimensional Fund Advisors
Texas
$49.5M +$6.25M +248,805 +14%
ACM
21
Analog Century Management
New York
$48.6M -$1.74M -69,268 -3%
KCM
22
Kodai Capital Management
Illinois
$41.6M +$41.6M +1,655,806 New
FGP
23
Freestone Grove Partners
California
$40.3M +$30.9M +1,230,709 +330%
UBS Group
24
UBS Group
Switzerland
$36.7M +$2.98M +118,718 +9%
SBH
25
Segall Bryant & Hamill
Illinois
$33M +$33M +1,311,526 New
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