Allegro Microsystems ALGM Institutional Ownership

NASDAQ ALGM

$37.16 -0.03 (-0.08%)

At close: Aug 21, 2026 · 4:00 PM EDT

Institutions by Trading Activity

315 Institutions

Increased 196 62.2%

Unchanged 35 11.1%

Reduced 84 26.7%

Ownership Statistics

13F · as of 31 Mar, 2026

Institutional Ownership

7,488.09%

▲+70.36 pp QoQ

Shares Held by Institutions

138.83Mn

of 1.85Mn outstanding

▲+18.28% QoQ

Shares Outstanding

1.85Mn

-136.98Mn held outside 13F filers

Institutional Investors

315

filed 13F for Mar 2026

▲+30 vs prior quarter

Net Shares Added (QoQ)

+21.45Mn

accumulated since last quarter

Value of Holdings

$5.47Bn

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

Quarter ending 31 Mar, 2026

Allegro Microsystems, Inc. (NASDAQ:ALGM) has 315 institutional investors with active 13F positions as of March 2026.

Collectively, these holders controlled 7488.1% of Allegro Microsystems's outstanding shares in March 2026, up from 7417.7% in December 2025.
They increased total shares held in Allegro Microsystems by 18.28% from last quarter, and the number of investors in ALGM increased 7.88% annually.
During the quarter, 196 of these 315 funds increased positions in ALGM, 84 reduced exposure, and 35 held steady.
Institutional investors collectively held 138.83Mn shares in Allegro Microsystems as of March 2026, up by 21.45Mn shares quarter on quarter, and down 25.17Mn shares year over year.
FMR LLC leads ownership in ALGM with 27.42Mn shares as of March 31, 2026, equal to 1479.03% of outstanding shares.
The biggest buyers of Allegro Microsystems for the quarter ending March 2026 included VANGUARD PORTFOLIO MANAGEMENT LLC (7.92Mn), VANGUARD CAPITAL MANAGEMENT LLC (5.46Mn), FMR LLC (3.79Mn), Jpmorgan Chase & Co (1.3Mn), Invesco Ltd. (1.1Mn).
Leading sellers of Allegro Microsystems shares for the quarter ending March 2026 were CITADEL ADVISORS LLC (2.16Mn), ADAGE CAPITAL PARTNERS GP, L.L.C. (1.34Mn), MILLENNIUM MANAGEMENT LLC (1.31Mn), Schonfeld Strategic Advisors LLC (743.12K), Capital Research Global Investors (675.73K).
Per Business Quant data, the top 10 holders of Allegro Microsystems for the quarter ending March 2026 are FMR LLC (27.42Mn), BlackRock, Inc. (12.49Mn), Capital Research Global Investors (12.44Mn), Invesco Ltd. (8.75Mn), Jpmorgan Chase & Co (8.65Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (7.92Mn), VANGUARD CAPITAL MANAGEMENT LLC (5.46Mn), State Street Corp (5.23Mn), Clearbridge Investments, LLC (2.86Mn), GEODE CAPITAL MANAGEMENT, LLC (2.46Mn).

Form 13F Holdings

315 Institutional Holders

Report period 31 Mar, 2026

Total shares held 138.83Mn

Of outstanding 7,488.09%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	FMR LLC	0000315066	27,421,206	1,479.03%	▲3,785,460	+16.02%	$864.59Mn
2	BlackRock, Inc.	0002012383	12,494,868	673.94%	▲293,411	+2.40%	$393.96Mn
3	Capital Research Global Investors	0001422848	12,435,558	670.74%	▼675,734	-5.15%	$392.09Mn
4	Invesco Ltd.	0000914208	8,751,481	472.03%	▲1,100,430	+14.38%	$275.93Mn
5	Jpmorgan Chase & Co	0000019617	8,652,068	466.67%	▲1,304,646	+17.76%	$242.60Mn
6	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	7,920,042	427.19%	▲7,920,042	0.00%	$249.72Mn
7	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	5,464,718	294.75%	▲5,464,718	0.00%	$172.30Mn
8	State Street Corp	0000093751	5,228,104	281.99%	▼131,384	-2.45%	$164.84Mn
9	Clearbridge Investments, LLC	0001348883	2,863,710	154.46%	▼53,075	-1.82%	$90.29Mn
10	GEODE CAPITAL MANAGEMENT, LLC	0001214717	2,456,820	132.51%	▲62,852	+2.63%	$77.48Mn
11	Morgan Stanley	0000895421	2,275,285	122.72%	▲42,149	+1.89%	$71.74Mn
12	DIMENSIONAL FUND ADVISORS LP	0000354204	2,170,487	117.07%	▲30,340	+1.42%	$68.40Mn
13	NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	0000921739	2,080,641	112.22%	▲44,429	+2.18%	$65.60Mn
14	Principal Financial Group Inc	0001126328	1,790,466	96.57%	▲48,170	+2.76%	$56.45Mn
15	ALLIANCEBERNSTEIN L.P.	0001109448	1,723,370	92.95%	▲574,718	+50.03%	$45.46Mn
16	LOOMIS SAYLES & CO L P	0000312348	1,674,108	90.30%	▲844,869	+101.88%	$52.78Mn
17	ADAGE CAPITAL PARTNERS GP, L.L.C.	0001165408	1,464,737	79.00%	▼1,339,207	-47.76%	$46.18Mn
18	VOYA INVESTMENT MANAGEMENT LLC	0001068837	1,459,271	78.71%	▲518,913	+55.18%	$46.01Mn
19	Goldman Sachs Group Inc	0000886982	1,437,215	77.52%	▼155,443	-9.76%	$45.32Mn
20	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0000884546	1,390,606	75.01%	▲28,188	+2.07%	$43.85Mn

Showing 1 to 20 of 315 holders