Allegro MicroSystems Ownership | Who Owns Allegro MicroSystems?

Overview Forecast RevenueFinancials Chart Transcripts

Allegro MicroSystems Ownership Summary

Allegro MicroSystems is owned by 10.17% institutional investors, 33.08% insiders, and 56.75% retail investors. Fmr is the largest institutional shareholder, holding 14.88% of ALGM shares. Fidelity Select Semiconductors is the top mutual fund, with 7.65% of its assets in Allegro MicroSystems shares.

ALGM Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Allegro MicroSystems	10.17%	33.08%	56.75%
Sector	Technology Stocks	35.26%	13.26%	51.48%
Idea	Semiconductor Stocks List	60.61%	7.19%	32.20%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Fmr	27.47M	14.88%	$802.06M
Vanguard group	14.20M	7.67%	$374.66M
Capital research global investors	13.11M	7.08%	$345.88M
Blackrock funding, inc. /de	12.20M	6.59%	$321.87M
Jpmorgan chase	7.35M	3.97%	$193.83M
Blackrock	6.63M	3.45%	$187.36M
Invesco	5.31M	2.88%	$155.12M
State street	5.28M	2.86%	$154.21M
Clearbridge investments	2.92M	1.58%	$76.94M
Alliancebernstein	2.69M	1.46%	$78.56M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
S squared	457.45K	4.67%	$12.07M
Lightrock netherlands b.v.	354.39K	1.94%	$9.35M
Analog century management lp	1.17M	1.84%	$34.31M
Pier capital	231.18K	0.97%	$6.10M
Segall bryant & hamill	1.32M	0.52%	$38.65M
Hel ved capital management	62.85K	0.45%	$1.66M
Prentiss smith	25.06K	0.39%	$661.08K
Sphera management technology funds	40.00K	0.37%	$1.17M
Paloma partners management	75.00K	0.36%	$2.19M
Lecap asset management	29.70K	0.31%	$783.38K

Top Buyers

Holder	Shares	% Assets	Change
Norges bank	1.46M	0.00%	1.46M
Blackrock funding, inc. /de	12.20M	0.01%	824.04K
Point72 asset management	986.80K	0.05%	692.25K
Millennium management	1.32M	0.01%	651.88K
Goldman sachs group	796.33K	0.00%	450.98K

Top Sellers

Holder	Shares	% Assets	Change
Capital research global investors	13.11M	0.06%	-3.71M
Macquarie group	-	-	-2.20M
Freestone grove partners lp	-	-	-1.60M
Wellington management group llp	1.16M	0.01%	-1.48M
Frontier capital management	895.80K	0.23%	-1.47M

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	1.46M	0.00%	1.46M	$38.46M
Renaissance	436.20K	0.02%	436.20K	$11.51M
Scout investments	389.39K	0.30%	389.39K	$11.00M
Cubist systematic strategies	273.68K	0.04%	273.68K	$7.99M
Man group	215.29K	0.01%	215.29K	$6.29M

Sold Out

Holder	Change
Financial gravity asset management	-1.00
Jfs wealth advisors	-1.00
Claris advisors, llc / mo /	-2.00
Bay harbor wealth management	-3.00
Dinuzzo private wealth	-4.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	93	-70.48%	18,824,783	-86.15%	10	0.19%	31	-78.91%	41	-62.04%
Sep 30, 2025	113	-61.17%	29,584,099	-78.76%	16	0.28%	45	-70.20%	45	-54.55%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Fidelity Select Semiconductors	14.18M	7.65%	-
American Funds SMALLCAP World A	6.26M	3.38%	-3.33M
American Funds Capital World Gr&Inc A	5.93M	3.20%	-
Capital Group World Growth & Inc Cmp	5.93M	3.20%	-
Vanguard US Total Market Shares ETF	4.00M	2.17%	890.47K
iShares Core S&P Mid-Cap ETF	4.01M	2.16%	964.11K
Invesco Small Cap Value A	3.94M	2.12%	1.81M
Vanguard Total Stock Mkt Idx Inv	3.82M	2.06%	9.15K
Vanguard Information Technology ETF	3.19M	1.72%	13.22K
Vanguard Small Cap Index	2.73M	1.47%	2.22K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Mar 02, 2026	Briansky Sharon	SVP, GC and Secretary	Sell	$340.44K
Mar 02, 2026	Hagen Erin	SVP, CHRO	Sell	$90.93K
Feb 17, 2026	Briansky Sharon	SVP, GC and Secretary	Sell	$384.76K
Dec 10, 2025	Briansky Sharon	SVP, GC and Secretary	Sell	$836.19K
Aug 22, 2025	Webster Roald Graham	VP, Chief Accounting Officer	Sell	$271.19K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	3
2025 Q4	-	1
2025 Q3	-	3
2025 Q2	-	2
2025 Q1	-	-

ALGM Ownership FAQ

Who owns the most shares of Allegro MicroSystems?

Allegro MicroSystems’s largest shareholders are Fmr (27.47M shares, 14.88%), Vanguard group (14.2M shares, 7.67%), and Capital research global investors (13.11M shares, 7.08%). Together, they hold 29.63% 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 4.67% of its assets in 457.45K Allegro MicroSystems shares, valued at 12.07M$.

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 7.65% of its total shares outstanding invested in 14.18M Allegro MicroSystems shares.

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