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Allegro MicroSystems Ownership | Who Owns Allegro MicroSystems?

OverviewForecastRevenueFinancialsChartTranscripts

Allegro MicroSystems Ownership Summary

Allegro MicroSystems is owned by 16.03% institutional investors, 33.12% insiders, and 50.85% retail investors. Fmr is the largest institutional shareholder, holding 14.88% of ALGM shares. Fidelity Select Semiconductors is the top mutual fund, with 7.34% of its assets in Allegro MicroSystems shares.

ALGM Ownership Benchmark

TypeName% Inst% Insiders% Retail
StockAllegro MicroSystems16.03%33.12%50.85%
SectorTechnology Stocks 50.69%12.56%36.75%
IdeaSemiconductor Stocks List 114.42%7.19%-21.61%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Fmr27.47M14.88%$802.06M
Capital research global investors16.82M9.11%$491.28M
Vanguard group14.29M7.74%$417.37M
Blackrock funding, inc. /de11.38M6.16%$332.22M
Jpmorgan chase7.73M4.19%$225.75M
Blackrock6.63M3.45%$187.36M
Invesco5.31M2.88%$155.12M
State street5.28M2.86%$154.21M
Clearbridge investments2.93M1.59%$85.64M
Alliancebernstein2.69M1.46%$78.56M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
S squared397.45K4.41%$11.61M
Analog century management lp1.17M1.84%$34.31M
Ecofi investissements sa41.20K1.44%$1.20M
Pier capital235.12K1.07%$6.87M
Segall bryant & hamill1.32M0.52%$38.65M
Axq capital, lp38.66K0.43%$1.13M
Prentiss smith25.06K0.41%$731.75K
Sphera management technology funds40.00K0.37%$1.17M
Paloma partners management75.00K0.36%$2.19M
Semanteon capital management, lp8.50K0.31%$248.32K

Top Buyers

HolderShares% AssetsChange
Norges bank1.23M0.00%1.23M
Capital research global investors16.82M0.09%920.37K
Point72 asset management986.80K0.05%692.25K
Millennium management1.32M0.01%651.88K
Scout investments389.39K0.30%389.39K

Top Sellers

HolderShares% AssetsChange
Freestone grove partners lp---1.60M
Wellington management group llp1.16M0.01%-1.48M
Frontier capital management895.80K0.23%-1.47M
Artisan partners limited partnership---1.43M
Summit partners public asset management---1.15M

New Positions

HolderShares% AssetsChangeValue
Norges bank1.23M0.00%1.23M$26.93M
Scout investments389.39K0.30%389.39K$11.00M
Cubist systematic strategies273.68K0.04%273.68K$7.99M
Man group215.29K0.01%215.29K$6.29M
Trexquant investment lp189.45K0.06%189.45K$5.53M

Sold Out

HolderChange
Jfs wealth advisors-1.00
Financial gravity asset management-1.00
Claris advisors, llc / mo /-2.00
Activest wealth management-3.00
Bay harbor wealth management-3.00

Institutional Ownership Trends

DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Sep 30, 2025113-61.17%29,584,099-78.76%160.28%45-70.20%45-54.55%
Jun 30, 2025297-4.81%145,898,259-6.38%791.10%152-13.64%10127.85%
Mar 31, 202531312.59%156,307,2459.92%841.42%17635.38%81-27.03%
Dec 31, 20242772.59%142,162,7830.57%771.38%130-17.72%11050.68%
Sep 30, 2024268-6.29%141,128,70931.62%742.43%1574.67%72-20.00%

Top Mutual Funds Shareholders

HolderShares% HoldingChange
Fidelity Select Semiconductors13.59M7.34%-
American Funds SMALLCAP World A10.16M5.50%166.57K
American Funds Capital World Gr&Inc A4.36M2.36%4.36M
Capital Group World Growth & Inc Cmp4.36M2.36%4.36M
iShares Core S&P Mid-Cap ETF4.26M2.30%-
Vanguard US Total Market Shares ETF4.00M2.17%890.47K
Vanguard Total Stock Mkt Idx Inv3.79M2.05%-79.69K
Vanguard Information Technology ETF2.92M1.58%29.75K
Vanguard Small Cap Index2.92M1.58%-19.61K
Fidelity Small Cap Value Fund2.23M1.21%-

Recent Insider Transactions

DateNameRoleActivityValue
Aug 22, 2025Webster Roald Graham VP, Chief Accounting OfficerSell$271.19K
Aug 12, 2025Lury Richard R.-Sell$222.67K
Aug 04, 2025Hagen Erin SVP, CHROSell$157.24K
Jun 11, 2025Lury Richard R.-Sell$94.39K
Jun 04, 2025Lury Richard R.-Sell$189.04K

Insider Transactions Trends

DateBuySell
2025 Q4--
2025 Q3-3
2025 Q2-2
2025 Q1--
2024 Q43-

ALGM Ownership FAQ

Who owns the most shares of Allegro MicroSystems?

Allegro MicroSystems’s largest shareholders are Fmr (27.47M shares, 14.88%), Capital research global investors (16.82M shares, 9.11%), and Vanguard group (14.29M shares, 7.74%). Together, they hold 31.74% of Allegro MicroSystems’s total shares outstanding.

Does Blackrock own Allegro MicroSystems?

Yes, BlackRock owns 3.45% of Allegro MicroSystems, totaling 6.63M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 187.36M$. In the last quarter, BlackRock decreased its holdings by -143K shares, a -2.11% change.

Who is Allegro MicroSystems’s biggest shareholder by percentage of total assets invested?

S squared is Allegro MicroSystems’s biggest shareholder by percentage of total assets invested, with 4.41% of its assets in 397.45K Allegro MicroSystems shares, valued at 11.61M$.

Who is the top mutual fund holder of Allegro MicroSystems shares?

Fidelity Select Semiconductors is the top mutual fund holder of Allegro MicroSystems shares, with 7.34% of its total shares outstanding invested in 13.59M Allegro MicroSystems shares.

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