Allegro Microsystems ALGM Institutional Ownership

NASDAQ ALGM

$31.48 -0.21 (-0.66%)

At close: Oct 23, 2026 · 4:00 PM EDT

Institutions by Trading Activity

373 Institutions

Increased 217 58.2%

Unchanged 50 13.4%

Reduced 106 28.4%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

79.75%

▲+4.99 pp QoQ

Shares Held by Institutions

148.18Mn

of 185.81Mn outstanding

▲+7.12% QoQ

Shares Outstanding

185.81Mn

37.63Mn held outside 13F filers

Institutional Investors

373

filed 13F for Jun 2026

▲+53 vs prior quarter

Net Shares Added (QoQ)

+9.85Mn

accumulated since last quarter

Value of Holdings

$4.66Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 21, 2026

Allegro Microsystems, Inc. (NASDAQ:ALGM) was held by 373 institutional investors that filed 13F reports for the quarter ended June 30, 2026.

These investors held 79.75% of Allegro Microsystems' outstanding shares at the end of Q2 2026, up from 74.76% in Q1 2026.
Total shares held in Allegro Microsystems rose 7.12% from Q1 2026, while the number of holders rose 38.15% from Q2 2025.
Looking at the 373 holders of ALGM individually, 217 added to their positions, 106 reduced their stakes and 50 left their positions unchanged.
Institutional investors held 148.18Mn shares of Allegro Microsystems in total at the end of Q2 2026, up 9.85Mn from the prior quarter and up 5.72Mn from a year earlier.
As of June 30, 2026, the biggest holder of Allegro Microsystems was FMR LLC with 25.58Mn shares, or 13.77% of shares outstanding.
Among holders that already owned Allegro Microsystems, the biggest buyers in Q2 2026 were Invesco Ltd. (+4.93Mn shares), JPMorgan Chase & Co (+4.07Mn shares), T. Rowe Price Associates Inc (+3.6Mn shares), BlackRock, Inc. (+1.39Mn shares) and Massachusetts Financial Services Co (+1.37Mn shares).
Holders that trimmed the most shares of Allegro Microsystems in Q2 2026 while keeping a position were FMR LLC (-1.84Mn shares), Nomura Asset Management International Inc. (-921.14K shares), Marshall Wace, LLP (-726.47K shares), Segall Bryant & Hamill, LLC (-715.9K shares) and AllianceBernstein L.P. (-522.17K shares).
Business Quant data shows the 10 biggest positions in Allegro Microsystems as of Q2 2026 were held by FMR LLC (25.58Mn shares), BlackRock, Inc. (13.89Mn shares), Invesco Ltd. (13.68Mn shares), JPMorgan Chase & Co (12.72Mn shares), Capital Research Global Investors (12.01Mn shares), Vanguard Portfolio Management LLC (7.67Mn shares), State Street Corp (5.68Mn shares), Vanguard Capital Management LLC (5.51Mn shares), T. Rowe Price Associates Inc (3.71Mn shares) and Clearbridge Investments, LLC (2.95Mn shares).

Form 13F Holdings

373 Institutional Holders

Report period 30 Jun, 2026

Total shares held 148.18Mn

Of outstanding 79.75%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	FMR LLC	0000315066	25,581,021	13.77%	▼1,840,185	-6.71%	$1.78Bn
2	BlackRock, Inc.	0002012383	13,889,324	7.48%	▲1,394,456	+11.16%	$966.97Mn
3	Invesco Ltd.	0000914208	13,678,393	7.36%	▲4,926,912	+56.30%	$952.29Mn
4	Jpmorgan Chase & Co	0000019617	12,723,790	6.85%	▲4,071,722	+47.06%	$844.87Mn
5	Capital Research Global Investors	0001422848	12,006,396	6.46%	▼429,162	-3.45%	$835.89Mn
6	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	7,668,472	4.13%	▼251,570	-3.18%	$533.88Mn
7	State Street Corp	0000093751	5,676,421	3.06%	▲448,317	+8.58%	$395.19Mn
8	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	5,508,806	2.96%	▲44,088	+0.81%	$383.52Mn
9	PRICE T ROWE ASSOCIATES INC /MD/	0000080255	3,710,288	2.00%	▲3,596,489	+3,160.39%	$258.31K
10	Clearbridge Investments, LLC	0001348883	2,946,239	1.59%	▲82,529	+2.88%	$205.12Mn
11	GEODE CAPITAL MANAGEMENT, LLC	0001214717	2,644,929	1.42%	▲188,109	+7.66%	$184.18Mn
12	DIMENSIONAL FUND ADVISORS LP	0000354204	2,123,963	1.14%	▼46,524	-2.14%	$147.85Mn
13	Morgan Stanley	0000895421	1,809,335	0.97%	▼465,950	-20.48%	$125.97Mn
14	LOOMIS SAYLES & CO L P	0000312348	1,619,931	0.87%	▼54,177	-3.24%	$112.78Mn
15	Goldman Sachs Group Inc	0000886982	1,575,057	0.85%	▲137,842	+9.59%	$109.66Mn
16	Principal Financial Group Inc	0001126328	1,489,791	0.80%	▼300,675	-16.79%	$103.72Mn
17	MASSACHUSETTS FINANCIAL SERVICES CO /MA/	0000912938	1,443,495	0.78%	▲1,374,198	+1,983.06%	$100.49Mn
18	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0000884546	1,360,525	0.73%	▼30,081	-2.16%	$94.72Mn
19	NORGES BANK	0001374170	1,294,958	0.70%	▲1,294,958	0.00%	$90.15Mn
20	ALLIANCEBERNSTEIN L.P.	0001109448	1,201,203	0.65%	▼522,167	-30.30%	$37.87Mn

Showing 1 to 20 of 373 holders