Allegro Microsystems, Inc.
ALGM- Exchange
- Nasdaq
- Industry
- Semiconductors & Related Devices
- SEC CIK
- 0000866291
In the last 90 days, Allegro Microsystems, Inc. insiders filed 0 open-market purchases and 2 sales; 375 institutions reported holding it in 13F filings for Q2 2026, worth $10.2B in total; Maverick Capital is the only superinvestor holding it.
13F holders, Q3 2025
Institutional positions in Allegro Microsystems, Inc. as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 296
- +25 vs. Q2 2025
- Shares held
- 135.9M
- −8.71M (−6.0%) vs. Q2 2025
- Total value
- $3.97B
- −$974.6M (−19.7%) vs. Q2 2025
- New holders
- 66
- 79 more added
- Sold out
- 41
- 108 more reduced
3 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ALGM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 375 | $10.2B |
| Q1 2026 | 322 | $4.32B |
| Q4 2025 | 294 | $3.60B |
| Q3 2025 | 296 | $3.97B |
| Q2 2025 | 274 | $4.99B |
| Q1 2025 | 292 | $3.96B |
| Q4 2024 | 256 | $3.11B |
| Q3 2024 | 248 | $3.32B |
| Q2 2024 | 268 | $3.03B |
| Q1 2024 | 277 | $2.80B |
| Q4 2023 | 288 | $2.91B |
| Q3 2023 | 312 | $2.99B |
| Q2 2023 | 353 | $4.41B |
| Q1 2023 | 314 | $4.67B |
| Q4 2022 | 219 | $2.89B |
| Q3 2022 | 170 | $1.97B |
| Q2 2022 | 172 | $1.83B |
| Q1 2022 | 173 | $2.54B |
| Q4 2021 | 165 | $3.18B |
| Q3 2021 | 153 | $2.71B |
| Q2 2021 | 129 | $2.22B |
| Q1 2021 | 123 | $1.98B |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Allegro Microsystems, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| FMR LLC | 27,467,843 | $802.1M | 0.04% | +220,370+0.8% | Added |
| Capital Research Global Investors | 16,824,722 | $491.3M | 0.09% | +920,365+5.8% | Added |
| Vanguard Group Inc | 14,293,465 | $417.4M | 0.01% | +87,526+0.6% | Added |
| BlackRock, Inc. | 11,377,418 | $332.2M | 0.01% | −412,450−3.5% | Reduced |
| JPMorgan Chase & Co | 7,731,267 | $225.8M | 0.01% | −282,231−3.5% | Reduced |
| Invesco Ltd. | 5,312,427 | $155.1M | 0.02% | −942,148−15.1% | Reduced |
| State Street Corp | 5,281,285 | $154.2M | 0.01% | +88,284+1.7% | Added |
| Clearbridge Investments, LLC | 2,932,806 | $85.6M | 0.06% | −230,958−7.3% | Reduced |
| Alliancebernstein L.P. | 2,690,496 | $78.6M | 0.02% | −69,376−2.5% | Reduced |
| Geode Capital Management, LLC | 2,369,129 | $69.2M | 0.00% | −36,857−1.5% | Reduced |
| Macquarie Group Ltd | 2,197,274 | $64.2M | 0.07% | −382,054−14.8% | Reduced |
| Dimensional Fund Advisors LP | 1,970,550 | $57.5M | 0.01% | −137,254−6.5% | Reduced |
| Morgan Stanley | 1,939,029 | $56.6M | 0.00% | −137,323−6.6% | Reduced |
| Principal Financial Group Inc | 1,914,074 | $55.9M | 0.03% | −243,263−11.3% | Reduced |
| Adage Capital Partners GP, L.L.C. | 1,576,627 | $46.0M | 0.07% | −600,933−27.6% | Reduced |
| Segall Bryant & Hamill, LLC | 1,323,726 | $38.7M | 0.51% | −4,528−0.3% | Reduced |
| Charles Schwab Investment Management Inc | 1,294,993 | $37.8M | 0.01% | +55,668+4.5% | Added |
| Analog Century Management LP | 1,174,953 | $34.3M | 1.84% | −196,637−14.3% | Reduced |
| Wellington Management Group LLP | 1,160,917 | $33.9M | 0.01% | −1,475,922−56.0% | Reduced |
| T. Rowe Price Investment Management, Inc. | 1,085,198 | $31.7M | 0.02% | −202,643−15.7% | Reduced |
| Northern Trust Corp | 1,010,857 | $29.5M | 0.00% | −47,867−4.5% | Reduced |
| Point72 Asset Management, L.P. | 986,800 | $28.8M | 0.06% | +692,245+235.0% | Added |
| Bank of America Corp | 952,679 | $27.8M | 0.00% | +493,910+107.7% | Added |
| Voya Investment Management LLC | 942,076 | $27.5M | 0.03% | +225,633+31.5% | Added |
| Raymond James Financial Inc | 926,358 | $27.0M | 0.01% | −328,824−26.2% | Reduced |
| Frontier Capital Management Co LLC | 895,797 | $26.2M | 0.23% | −1,470,160−62.1% | Reduced |
| Millennium Management LLC | 802,626 | $23.4M | 0.02% | +123,008+18.1% | Added |
| Loomis Sayles & Co L P | 802,023 | $23.4M | 0.03% | +135,662+20.4% | Added |
| Bank of New York Mellon Corp | 793,515 | $23.2M | 0.00% | −248,905−23.9% | Reduced |
| Silvercrest Asset Management Group LLC | 685,061 | $20.0M | 0.13% | −5,304−0.8% | Reduced |
| GW&K Investment Management, LLC | 683,505 | $20.0M | 0.18% | −21,313−3.0% | Reduced |
| Royal Bank of Canada | 642,474 | $18.8M | 0.00% | −206,037−24.3% | Reduced |
| UBS Group AG | 579,278 | $16.9M | 0.00% | −80,362−12.2% | Reduced |
| First Trust Advisors LP | 551,593 | $16.1M | 0.01% | −24,885−4.3% | Reduced |
| Balyasny Asset Management LLC | 498,331 | $14.6M | 0.03% | −973,758−66.1% | Reduced |
| S Squared Technology, LLC | 397,451 | $11.6M | 4.41% | 00.0% | Unchanged |
| Allspring Global Investments Holdings, LLC | 360,186 | $10.2M | 0.02% | −30,918−7.9% | Reduced |
| Goldman Sachs Group Inc | 345,346 | $10.1M | 0.00% | +107,785+45.4% | Added |
| Squarepoint Ops LLC | 339,926 | $9.93M | 0.02% | +339,926 | New |
| UBS Asset Management Americas Inc | 337,478 | $9.85M | 0.00% | −145,845−30.2% | Reduced |
| Citadel Advisors LLC | 331,631 | $9.68M | 0.01% | −1,187,777−78.2% | Reduced |
| Ameriprise Financial Inc | 326,922 | $9.55M | 0.00% | −90,232−21.6% | Reduced |
| Rhumbline Advisers | 312,924 | $9.14M | 0.01% | −16,946−5.1% | Reduced |
| Peregrine Capital Management LLC | 274,477 | $8.01M | 0.24% | +39,552+16.8% | Added |
| Cubist Systematic Strategies, LLC | 273,675 | $7.99M | 0.11% | +273,675 | New |
| Swiss National Bank | 250,900 | $7.33M | 0.00% | +4,700+1.9% | Added |
| AQR Capital Management LLC | 250,384 | $7.31M | 0.00% | +229,655+1,107.9% | Added |
| Neuberger Berman Group LLC | 249,564 | $7.29M | 0.01% | −994,851−79.9% | Reduced |
| Nuveen, LLC | 241,927 | $7.06M | 0.00% | −3,702−1.5% | Reduced |
| Pier Capital, LLC | 235,118 | $6.87M | 1.07% | −27,035−10.3% | Reduced |
| Man Group plc | 215,287 | $6.29M | 0.01% | +215,287 | New |
| Jane Street Group, LLC | 210,348 | $6.14M | 0.01% | +210,348 | New |
| Legal & General Group Plc | 196,977 | $5.75M | 0.00% | −5,504−2.7% | Reduced |
| Retirement Systems of Alabama | 190,895 | $5.57M | 0.02% | −9,886−4.9% | Reduced |
| Trexquant Investment LP | 189,448 | $5.53M | 0.06% | +189,448 | New |
| Trillium Asset Management, LLC | 166,544 | $4.86M | 0.13% | −144,285−46.4% | Reduced |
| Two Sigma Investments, LP | 161,348 | $4.71M | 0.01% | −185,458−53.5% | Reduced |
| Wells Fargo & Company | 151,563 | $4.43M | 0.00% | −13,926−8.4% | Reduced |
| Barclays PLC | 151,025 | $4.41M | 0.00% | +33,266+28.2% | Added |
| ArrowMark Colorado Holdings LLC | 149,649 | $4.37M | 0.08% | −77,728−34.2% | Reduced |
| BNP Paribas Arbitrage, SA | 144,571 | $4.22M | 0.00% | +125,854+672.4% | Added |
| Marshall Wace, LLP | 138,086 | $4.03M | 0.00% | +138,086 | New |
| Castleark Management LLC | 133,508 | $3.90M | 0.11% | +30,348+29.4% | Added |
| Susquehanna International Group, LLP | 126,758 | $3.70M | 0.01% | −27,356−17.8% | Reduced |
| Gotham Asset Management, LLC | 124,488 | $3.64M | 0.02% | +116,138+1,390.9% | Added |
| IMC-Chicago, LLC | 122,837 | $3.59M | 0.06% | +122,837 | New |
| California State Teachers Retirement System | 118,744 | $3.47M | 0.00% | +60.0% | Added |
| Susquehanna Portfolio Strategies, LLC | 115,830 | $3.38M | 0.05% | 00.0% | Unchanged |
| State of Wisconsin Investment Board | 111,839 | $3.27M | 0.01% | −4,813−4.1% | Reduced |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 105,967 | $3.09M | 0.00% | −10,956−9.4% | Reduced |
| Royce & Associates LP | 102,230 | $2.99M | 0.03% | +102,230 | New |
| Point72 Hong Kong Ltd | 98,300 | $2.87M | 0.13% | +98,300 | New |
| Price T Rowe Associates Inc | 96,630 | $2.82M | 0.00% | +7,303+8.2% | Added |
| State Board of Administration of Florida Retirement System | 92,797 | $2.71M | 0.00% | +8,214+9.7% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 90,592 | $2.65M | 0.00% | −58,385−39.2% | Reduced |
| Jain Global LLC | 89,935 | $2.63M | 0.03% | +8,123+9.9% | Added |
| Candriam Luxembourg S.C.A. | 89,175 | $2.60M | 0.01% | +89,175 | New |
| SEI Investments Co | 88,128 | $2.57M | 0.00% | +1,776+2.1% | Added |
| HSBC Holdings PLC | 86,851 | $2.53M | 0.00% | +48,911+128.9% | Added |
| State of Tennessee, Treasury Department | 86,631 | $2.53M | 0.01% | −6,734−7.2% | Reduced |
| Manufacturers Life Insurance Company, The | 84,637 | $2.47M | 0.00% | −9,014−9.6% | Reduced |
| Summit Trail Advisors, LLC | 82,233 | $2.40M | 0.03% | +70,703+613.2% | Added |
| Schonfeld Strategic Advisors LLC | 80,465 | $2.35M | 0.02% | −354,843−81.5% | Reduced |
| Schroder Investment Management Group | 75,401 | $2.20M | 0.00% | +75,401 | New |
| Paloma Partners Management Co | 75,000 | $2.19M | 0.44% | +75,000 | New |
| HRT Financial LP | 74,395 | $2.17M | 0.01% | −56,436−43.1% | Reduced |
| Quantbot Technologies LP | 71,708 | $2.09M | 0.06% | +54,528+317.4% | Added |
| Engineers Gate Manager LP | 69,166 | $2.02M | 0.02% | +69,166 | New |
| State of New Jersey Common Pension Fund D | 68,882 | $2.01M | 0.01% | −3,810−5.2% | Reduced |
| MetLife Investment Management | 63,706 | $1.86M | 0.01% | −6,561−9.3% | Reduced |
| Caption Management, LLC | 62,974 | $1.84M | 0.11% | +47,974+319.8% | Added |
| Van Eck Associates Corp | 60,707 | $1.77M | 0.00% | +30,890+103.6% | Added |
| Quantinno Capital Management LP | 58,578 | $1.71M | 0.00% | +11,639+24.8% | Added |
| Janus Henderson Group PLC | 57,329 | $1.67M | 0.00% | 00.0% | Unchanged |
| Mutual of America Capital Management LLC | 57,256 | $1.67M | 0.02% | −7,755−11.9% | Reduced |
| Amalgamated Bank | 56,767 | $1.66M | 0.01% | −2,500−4.2% | Reduced |
| Kennedy Capital Management, Inc. | 56,613 | $1.65M | 0.04% | −16,782−22.9% | Reduced |
| Treasurer of the State of North Carolina | 55,337 | $1.62M | 0.00% | −2,149−3.7% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 54,082 | $1.58M | 0.01% | +8,200+17.9% | Added |
| Occudo Quantitative Strategies LP | 53,934 | $1.57M | 0.19% | +34,181+173.0% | Added |