ALGM Institutional Ownership & Shareholders
ALLEGRO MICROSYSTEMS INC (ALGM) is currently held by 363 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $10.15B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Fmr Llc is currently the largest disclosed institutional shareholder of ALGM tracked by InsiderSet, reporting ownership valued at approximately $1.78B in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $780.99M, representing an estimated loss of -56.15% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 71% of the total disclosed ALGM value among the investors covered in this analysis. Major shareholders include Fmr Llc, Blackrock, Inc., Invesco Ltd., and several other long-term asset managers with concentrated positions in ALLEGRO MICROSYSTEMS INC (ALGM).
This page ranks the largest institutional ALGM shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
363
Total Reported Value
$10.15B
Largest Holder
Fmr Llc
Largest Position
$1.78B
Insider Transactions (90d)
6
Latest Filing Quarter
Q2 2026
New Institutional Positions
93
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Fmr Llc | 0.08% | 25,581,021 | $1,780,950,716 | $780,988,571 | -$999,962,145 | -56.15% | |
| Blackrock, Inc. | 0.01% | 13,889,324 | $966,974,743 | $424,041,062 | -$542,933,681 | -56.15% | |
| Invesco Ltd. | 0.08% | 13,678,393 | $952,289,720 | $417,601,338 | -$534,688,382 | -56.15% | |
| Jpmorgan Chase & Co | 0.05% | 12,723,790 | $844,865,142 | $388,457,309 | -$456,407,833 | -54.02% | |
| Capital Research Global Investors | 0.12% | 12,006,396 | $835,885,290 | $366,555,270 | -$469,330,020 | -56.15% | |
| Vanguard Portfolio Management Llc | 0.02% | 7,668,472 | $533,879,021 | $234,118,450 | -$299,760,571 | -56.15% | |
| State Street Corp | 0.01% | 5,676,421 | $395,192,430 | $173,301,133 | -$221,891,297 | -56.15% | |
| Vanguard Capital Management Llc | 0.01% | 5,508,806 | $383,523,074 | $168,183,847 | -$215,339,227 | -56.15% | |
| Price T Rowe Associates Inc | 0.03% | 3,710,288 | $258,311,000 | $113,275,093 | -$145,035,907 | -56.15% | |
| Clearbridge Investments, Llc | 0.17% | 2,946,239 | $205,117,173 | $89,948,677 | -$115,168,496 | -56.15% | |
| Geode Capital Management, Llc | 0.01% | 2,644,929 | $184,178,667 | $80,749,682 | -$103,428,985 | -56.16% | |
| Dimensional Fund Advisors Lp | 0.03% | 2,123,963 | $147,846,925 | $64,844,590 | -$83,002,335 | -56.14% | |
| Morgan Stanley | 0.01% | 1,809,335 | $125,966,099 | $55,238,998 | -$70,727,101 | -56.15% | |
| Loomis Sayles & Co L P | 0.14% | 1,619,931 | $112,779,596 | $49,456,493 | -$63,323,103 | -56.15% | |
| Goldman Sachs Group Inc | 0.01% | 1,575,057 | $109,655,469 | $48,086,490 | -$61,568,979 | -56.15% | |
| Massachusetts Financial Services Co | 0.03% | 1,443,495 | $100,487,390 | $44,069,902 | -$56,417,488 | -56.14% | |
| Charles Schwab Investment Management Inc | 0.01% | 1,360,525 | $94,719,751 | $41,536,828 | -$53,182,923 | -56.15% | |
| Norges Bank | 0.01% | 1,294,958 | $90,154,976 | $39,535,068 | -$50,619,908 | -56.15% | |
| Northern Trust Corp | 0.01% | 1,167,135 | $81,255,938 | $35,632,632 | -$45,623,306 | -56.15% | |
| Nomura Asset Management International Inc. | 0.12% | 1,159,503 | $80,725,000 | $35,399,627 | -$45,325,373 | -56.15% | |
| Adage Capital Partners Gp, L.L.C. | 0.11% | 1,121,950 | $78,110,159 | $34,253,134 | -$43,857,026 | -56.15% | |
| Voya Investment Management Llc | 0.06% | 966,871 | $67,313,558 | $29,518,572 | -$37,794,986 | -56.15% | |
| Raymond James Financial Inc | 0.02% | 928,060 | $64,611,536 | $28,333,672 | -$36,277,864 | -56.15% | |
| Bank Of America Corp | 0.00% | 921,728 | $64,170,703 | $28,140,356 | -$36,030,347 | -56.15% | |
| Principal Financial Group Inc | 0.03% | 1,729,566 | $62,869,724 | $52,803,650 | -$10,066,074 | -16.01% | |
| Wellington Management Group Llp | 0.01% | 814,937 | $56,735,914 | $24,880,027 | -$31,855,887 | -56.15% | |
| Vanguard Fiduciary Trust Co | 0.01% | 800,030 | $55,698,089 | $24,424,916 | -$31,273,173 | -56.15% | |
| Ubs Group Ag | 0.01% | 780,945 | $54,369,391 | $23,842,251 | -$30,527,140 | -56.15% | |
| Nuveen, Llc | 0.01% | 722,645 | $50,310,545 | $22,062,352 | -$28,248,193 | -56.15% | |
| Bank Of New York Mellon Corp | 0.01% | 716,952 | $49,914,204 | $21,888,545 | -$28,025,659 | -56.15% | |
| Kennedy Capital Management Llc | 0.85% | 689,668 | $48,014,686 | $21,055,564 | -$26,959,122 | -56.15% | |
| First Trust Advisors Lp | 0.03% | 684,022 | $47,621,611 | $20,883,192 | -$26,738,419 | -56.15% | |
| Gw&K Investment Management, Llc | 0.36% | 666,812 | $46,424,000 | $20,357,770 | -$26,066,230 | -56.15% | |
| Ameriprise Financial Inc | 0.01% | 608,793 | $42,953,870 | $18,586,450 | -$24,367,420 | -56.73% | |
| Allspring Global Investments Holdings, Llc | 0.06% | 620,540 | $39,218,128 | $18,945,086 | -$20,273,042 | -51.69% | |
| Alliancebernstein L.P. | 0.01% | 1,201,203 | $37,873,931 | $36,672,728 | -$1,201,203 | -3.17% | |
| Silvercrest Asset Management Group Llc | 0.25% | 537,082 | $37,391,736 | $16,397,113 | -$20,994,623 | -56.15% | |
| Lord, Abbett & Co. Llc | 0.10% | 525,863 | $36,611,000 | $16,054,597 | -$20,556,403 | -56.15% | |
| T. Rowe Price Investment Management, Inc. | 0.02% | 517,648 | $36,039,000 | $15,803,793 | -$20,235,207 | -56.15% | |
| Aqr Capital Management Llc | 0.01% | 493,753 | $33,417,232 | $15,074,279 | -$18,342,953 | -54.89% | |
| Aperture Investors, Llc | 3.28% | 443,427 | $30,871,388 | $13,537,826 | -$17,333,562 | -56.15% | |
| Conestoga Capital Advisors, Llc | 0.79% | 719,595 | $26,157,278 | $21,969,235 | -$4,188,043 | -16.01% | |
| Two Sigma Investments, Lp | 0.02% | 343,994 | $23,948,862 | $10,502,137 | -$13,446,725 | -56.15% | |
| Rhumbline Advisers | 0.02% | 333,507 | $23,218,704 | $10,181,969 | -$13,036,735 | -56.15% | |
| S Squared Technology, Llc | 7.18% | 332,451 | $23,145,239 | $10,149,729 | -$12,995,510 | -56.15% | |
| Segall Bryant & Hamill, Llc | 0.27% | 332,440 | $23,144,473 | $10,149,393 | -$12,995,080 | -56.15% | |
| Frontier Capital Management Co Llc | 0.21% | 330,904 | $23,037,508 | $10,102,499 | -$12,935,009 | -56.15% | |
| Cibc Bancorp Usa Inc. | 0.03% | 327,536 | $22,806,886 | $9,999,674 | -$12,807,212 | -56.16% | |
| Gotham Asset Management, Llc | 0.05% | 325,436 | $22,656,854 | $9,935,561 | -$12,721,293 | -56.15% | |
| Hrt Financial Lp | 0.04% | 316,439 | $22,030,000 | $9,660,883 | -$12,369,117 | -56.15% |
Frequently asked questions about ALGM
Who are the largest institutional holders of ALGM?
The largest institutional holders of ALGM reported in the latest SEC Form 13F filings include Fmr Llc, Blackrock, Inc., Invesco Ltd., Jpmorgan Chase & Co, and Capital Research Global Investors. InsiderSet ranks institutional holders by their latest reported ALGM position.
What is ALGM institutional ownership?
This page tracks ALGM positions reported by institutional investment managers through SEC Form 13F. ALLEGRO MICROSYSTEMS INC (ALGM) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ALGM?
InsiderSet currently tracks 363 institutional managers reporting ALGM holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ALGM shareholders.
How much ALGM stock do institutions own?
Institutional investment managers disclosed approximately $10.15B in ALGM holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ALGM institutional ownership last updated?
The latest ALGM institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ALGM holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ALGM position after the reporting date.
Are institutions buying or selling ALGM?
Institutional buying and selling can be analyzed by comparing ALGM positions across consecutive 13F reporting periods. InsiderSet's ALGM Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ALGM ownership changes.
How has ALGM institutional ownership changed over time?
InsiderSet tracks ALGM institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.