ALGM

Allegro Microsystems Inc
Information TechnologyUSCUSIP 01749D105◍ Confluence graph
Tracked 13F Holders
320
-120 QoQ
13F Value (tracked)
$4.0B
Insider Net · 180d
-$3.6M
0↑ 9↓
Recent Filings
15
Smart-money sentimentMixed
BearishBullish
13F funds (latest Q)39 adding · 19 trimming
Insider net (180d)-$3.6M

Who owns ALGM?

320 tracked 13F filers

320 tracked 13F filers disclose a position in ALGM as of the latest SEC 13F filings, a combined $4.0B in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

All quarters use one ordinary-share-equivalent series. Historical ADS are converted at 2 ADS = 1 ordinary share. Expand a row for the exact calculation; the residual is not classified as a trade.
3 source-reported value rows are withheld because the reported units do not agree with same-security peers. Share counts remain visible and unchanged.
#FundPosition valueSharesLast moveAs ofHistory
1FMR LLC
$864.6M
27.4M
+16%
Added · +3.8M sh
Q1 2026
2BlackRock, Inc.
$394.0M
12.5M
+2.4%
Added · +293K sh
Q1 2026
3JPMORGAN CHASE & CO
$242.6M
8.7M
+18%
Added · +1.3M sh
Q1 2026
4VANGUARD PORTFOLIO MANAGEMENT LLC
$249.7M
7.9M
First observed position
No prior filed position
Q1 2026
5STATE STREET CORP
$395.2M
5.7M
+8.6%
Added · +448K sh
Q2 2026
6VANGUARD CAPITAL MANAGEMENT LLC
$172.3M
5.5M
First observed position
No prior filed position
Q1 2026
7Clearbridge Investments, LLC
$90.3M
2.9M
−1.8%
Reduced · −53K sh
Q1 2026
8GEODE CAPITAL MANAGEMENT, LLC
$184.2M
2.6M
+7.7%
Added · +188K sh
Q2 2026
9MORGAN STANLEY
$71.7M
2.3M
+1.9%
Added · +42K sh
Q1 2026
10DIMENSIONAL FUND ADVISORS LP
$68.4M
2.2M
+1.4%
Added · +30K sh
Q1 2026
11PRINCIPAL FINANCIAL GROUP INC
$56.5M
1.8M
+2.8%
Added · +48K sh
Q1 2026
12ALLIANCEBERNSTEIN L.P.
$45.5M
1.7M
+50%
Added · +575K sh
Q1 2026
13LOOMIS SAYLES & CO L P
$52.8M
1.7M
+102%
Added · +845K sh
Q1 2026
14ADAGE CAPITAL PARTNERS GP, L.L.C.
$46.2M
1.5M
−48%
Reduced · −1.3M sh
Q1 2026
15VOYA INVESTMENT MANAGEMENT LLC
$46.0M
1.5M
+55%
Added · +519K sh
Q1 2026
16NORGES BANK
$38.5M
1.5M
+3.5%
Added · +50K sh
Q4 2025
17GOLDMAN SACHS GROUP INC
$45.3M
1.4M
+80%
Added · +641K sh
Q1 2026
18CHARLES SCHWAB INVESTMENT MANAGEMENT INC
$43.8M
1.4M
+2.1%
Added · +28K sh
Q1 2026
19NORTHERN TRUST CORP
$33.0M
1.0M
+3.0%
Added · +31K sh
Q1 2026
20RAYMOND JAMES FINANCIAL INC
$31.4M
996K
+9.6%
Added · +87K sh
Q1 2026
21Nuveen, LLC
$29.9M
948K
+292%
Added · +706K sh
Q1 2026
22KENNEDY CAPITAL MANAGEMENT LLC
$28.7M
910K
20×
Added · +865K sh
Q1 2026
23BANK OF AMERICA CORP /DE/
$27.0M
855K
+48%
Added · +279K sh
Q1 2026
24VANGUARD FIDUCIARY TRUST CO
$24.1M
766K
First observed position
No prior filed position
Q1 2026
25Bank of New York Mellon Corp
$23.4M
743K
−1.0%
Reduced · −7K sh
Q1 2026

Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

Is ALGM being bought or sold by institutions?

Last quarter, 12 funds opened a new position in ALGM and 27 added to an existing one, while 19 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).

Opened (NEW)
12
funds
Added
27
funds
Reduced
19
funds
Exited
0
funds

Funds that own ALGM also own

CompanyCo-held byCombined value
MICROSOFT CORPMSFT168 funds$206.0B
NVIDIA CORPNVDA167 funds$315.3B
AMAZON.COM INCAMZN167 funds$155.3B
META PLATFORMS INC-CLASS AMETA164 funds$90.4B
ALPHABET INC-CL AGOOGL163 funds$125.5B
APPLE INCAAPL162 funds$230.9B
ELI LILLY & COLLY162 funds$58.7B
VISA INC-CLASS A SHARESV161 funds$51.1B
BROADCOM INCAVGO160 funds$118.2B
ALPHABET INC-CL CGOOG160 funds$96.7B
JPMORGAN CHASE & COJPM160 funds$48.1B
MASTERCARD INC - AMA158 funds$41.7B

Ranked by how many of ALGM's institutional holders also hold each name, a cross-fund conviction signal.

Insider activity (Form 4)

Full insider page →
Buys · 180d
$0
0 insiders
Sells · 180d
$3.6M
9 insiders
Net
-$3.6M
9 P/S txns
Signal
Net Selling
open-market
DateInsiderRoleActionSharesValue
Aug 17, 2026Raubacher JennieDirectorSell (S)1K$45K
Aug 10, 2026Hagen ErinSVP, CHROSell (S)2K$101K
Jun 3, 2026Madormo RichardSVP, Worldwide SalesSell (S)5K$264K
May 22, 2026Coleman TroySVP, General Manager, ProductsSell (S)5K$206K
May 21, 2026Webster Roald GrahamVP, Chief Accounting OfficerSell (S)5K$234K
May 18, 2026Kent IanSVP, Global OperationsSell (S)3K$110K
May 14, 2026Lynch Susan DDirectorSell (S)17K$760K
May 11, 2026Doogue MichaelPresident and CEO, DirectorSell (S)30K$1.4M
May 11, 2026Briansky SharonSVP, GC and SecretarySell (S)9K$425K
Mar 2, 2026Hagen ErinSVP, CHROSell (S)3K$91K
Mar 2, 2026Briansky SharonSVP, GC and SecretarySell (S)10K$340K
Feb 17, 2026Briansky SharonSVP, GC and SecretarySell (S)9K$385K

Institutional ownership over time

152 funds-37 since Q3 2024
0136272Q3 2024Q1 2025Q3 2025Q1 2026Q2 2026
funds holding aggregate valuelatest $955.5M · 1 values withheld

Recent filings

15 shown

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Connected entities for ALGM

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Ask your agent what changed in ALGM

This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.

Copy-paste
curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://arkolith.com/api/v1/stocks/ALGM/capital-change-brief"
Ask your agent
Use Arkolith's capital_change_brief for ALGM.
Tell me what changed, whether insider activity
corroborates it, and cite the SEC evidence.

13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for ALGM. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.