Allegro MicroSystems Ownership | Who Owns Allegro MicroSystems?

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Allegro MicroSystems Ownership Summary

Allegro MicroSystems is owned by 79.04% institutional investors, 33.16% insiders. Fmr is the largest institutional shareholder, holding 12.04% of ALGM shares. Fidelity Select Semiconductors is the top mutual fund, with 7.34% of its assets in Allegro MicroSystems shares.

ALGM Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Allegro MicroSystems	79.04%	33.16%	-12.20%
Sector	Technology Stocks	126.02%	12.46%	-38.47%
Idea	Semiconductor Stocks List	62.65%	7.35%	30.01%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Fmr	22.77M	12.04%	$497.85M
Capital research global investors	15.90M	8.62%	$543.77M
Vanguard group	14.08M	7.44%	$307.85M
Blackrock funding, inc. /de	11.79M	6.39%	$403.10M
Jpmorgan chase	10.53M	5.57%	$230.22M
Blackrock	6.63M	3.45%	$187.36M
State street	5.88M	3.19%	$128.48M
Wellington management group llp	3.99M	2.11%	$87.30M
Clearbridge investments	3.38M	1.79%	$74.00M
Frontier capital management	2.37M	1.28%	$80.89M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
S squared	397.45K	5.73%	$13.59M
Ecofi investissements sa	27.10K	5.00%	$4.50M
Analog century management lp	2.00M	2.93%	$43.75M
Pier capital	262.15K	1.37%	$8.96M
Lisanti capital growth	109.97K	1.04%	$3.76M
Summit partners public asset management	1.15M	1.00%	$39.46M
G2 investment partners management	130.00K	0.97%	$4.44M
Frontier capital management	2.37M	0.75%	$80.89M
Nkcfo	28.00K	0.40%	$957.00K
Yorktown management & research	11.30K	0.37%	$386.35K

Top Buyers

Holder	Shares	% Assets	Change
Capital research global investors	15.90M	0.11%	4.84M
Schonfeld strategic advisors	1.62M	0.21%	1.62M
Norges bank	1.23M	0.00%	1.23M
Ubs group	1.34M	0.01%	1.01M
Wellington management group llp	3.99M	0.02%	934.05K

Top Sellers

Holder	Shares	% Assets	Change
Fmr	22.77M	0.03%	-5.48M
Manufacturers life insurance company, the	102.28K	0.00%	-2.05M
Freestone grove partners lp	-	-	-1.60M
Ameriprise financial	360.52K	0.00%	-1.59M
Morgan stanley	2.08M	0.00%	-1.44M

New Positions

Holder	Shares	% Assets	Change	Value
Schonfeld strategic advisors	1.62M	0.21%	1.62M	$35.43M
Norges bank	1.23M	0.00%	1.23M	$26.93M
Bnp paribas arbitrage, snc	639.26K	0.01%	639.26K	$13.97M
Scout investments	389.39K	0.30%	389.39K	$11.00M
Point72 asset management	294.56K	0.02%	294.56K	$10.07M

Sold Out

Holder	Change
Jfs wealth advisors	-1.00
Financial gravity asset management	-1.00
Quest partners	-1.00
Claris advisors, llc / mo /	-2.00
Activest wealth management	-3.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2025	297	-4.81%	145,898,259	-6.38%	79	1.10%	152	-13.64%	101	27.85%
Mar 31, 2025	313	12.59%	156,307,245	9.92%	84	1.42%	176	35.38%	81	-27.03%
Dec 31, 2024	277	2.59%	142,162,783	0.57%	77	1.38%	130	-17.72%	110	50.68%
Sep 30, 2024	268	-6.29%	141,128,709	31.62%	74	2.43%	157	4.67%	72	-20.00%
Jun 30, 2024	284	-4.70%	107,220,294	3.33%	55	1.92%	148	0.68%	90	-9.09%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Fidelity Select Semiconductors	13.59M	7.34%	98.65K
American Funds SMALLCAP World A	10.16M	5.50%	166.57K
American Funds Capital World Gr&Inc A	4.36M	2.36%	4.36M
Capital Group World Growth & Inc Cmp	4.36M	2.36%	4.36M
iShares Core S&P Mid-Cap ETF	4.26M	2.30%	-7.64K
Vanguard US Total Market Shares ETF	4.00M	2.17%	890.47K
Vanguard Total Stock Mkt Idx Inv	3.79M	2.05%	-79.69K
Vanguard Information Technology ETF	2.92M	1.58%	29.75K
Vanguard Small Cap Index	2.92M	1.58%	-19.61K
Fidelity Small Cap Value Fund	2.23M	1.21%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Aug 12, 2025	Lury Richard R.	-	Sell	$222.67K
Aug 04, 2025	Hagen Erin	SVP, CHRO	Sell	$157.24K
Jun 11, 2025	Lury Richard R.	-	Sell	$94.39K
Jun 04, 2025	Lury Richard R.	-	Sell	$189.04K
Nov 18, 2024	Doogue Michael	SVP, CTO	Buy	$285.00K

Insider Transactions Trends

Date	Buy	Sell
2025 Q3	-	2
2025 Q2	-	2
2025 Q1	-	-
2024 Q4	3	-
2024 Q3	-	2

ALGM Ownership FAQ

Who owns the most shares of Allegro MicroSystems?

Allegro MicroSystems’s largest shareholders are Fmr (22.77M shares, 12.04%), Capital research global investors (15.9M shares, 8.62%), and Vanguard group (14.08M shares, 7.44%). Together, they hold 28.10% 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 5.73% of its assets in 397.45K Allegro MicroSystems shares, valued at 13.59M$.

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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