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, Q4 2025
Institutional positions in Allegro Microsystems, Inc. as of Dec 31, 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
- 294
- +5 vs. Q3 2025
- Shares held
- 136.5M
- +1.07M (+0.8%) vs. Q3 2025
- Total value
- $3.60B
- −$352.0M (−8.9%) vs. Q3 2025
- New holders
- 56
- 79 more added
- Sold out
- 51
- 122 more reduced
7 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Allegro Microsystems, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Police & Firemen's Retirement System of New Jersey | 52,277 | $1.38M | 0.01% | −1,805−3.3% | Reduced |
| Amalgamated Bank | 54,325 | $1.43M | 0.01% | −2,442−4.3% | Reduced |
| D. E. Shaw & Co., Inc. | 55,304 | $1.46M | 0.00% | +55,304 | New |
| Van Eck Associates Corp | 55,496 | $1.46M | 0.00% | −5,211−8.6% | Reduced |
| Janus Henderson Group PLC | 57,329 | $1.51M | 0.00% | 00.0% | Unchanged |
| MetLife Investment Management | 60,588 | $1.60M | 0.01% | −3,118−4.9% | Reduced |
| Hel Ved Capital Management Ltd | 62,850 | $1.66M | 0.57% | +62,850 | New |
| Quantinno Capital Management LP | 65,353 | $1.72M | 0.00% | +6,775+11.6% | Added |
| Wells Fargo & Company | 65,373 | $1.72M | 0.00% | −86,190−56.9% | Reduced |
| Two Sigma Advisers, LP | 70,900 | $1.87M | 0.00% | +60,100+556.5% | Added |
| Gotham Asset Management, LLC | 73,093 | $1.93M | 0.01% | −51,395−41.3% | Reduced |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 74,366 | $2.00M | 0.00% | −31,601−29.8% | Reduced |
| Trexquant Investment LP | 79,486 | $2.10M | 0.02% | −109,962−58.0% | Reduced |
| Massachusetts Financial Services Co | 80,157 | $2.11M | 0.00% | +39,767+98.5% | Added |
| Manufacturers Life Insurance Company, The | 82,250 | $2.17M | 0.00% | −2,387−2.8% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 83,810 | $2.21M | 0.00% | −6,782−7.5% | Reduced |
| Candriam Luxembourg S.C.A. | 87,888 | $2.32M | 0.01% | −1,287−1.4% | Reduced |
| Barclays PLC | 88,300 | $2.33M | 0.00% | −62,725−41.5% | Reduced |
| Granahan Investment Management Inc | 89,857 | $2.37M | 0.10% | +89,857 | New |
| HRT Financial LP | 90,344 | $2.38M | 0.01% | +15,949+21.4% | Added |
| Summit Trail Advisors, LLC | 92,506 | $2.44M | 0.04% | +10,273+12.5% | Added |
| State Board of Administration of Florida Retirement System | 92,797 | $2.45M | 0.00% | 00.0% | Unchanged |
| State of New Jersey Common Pension Fund D | 92,928 | $2.45M | 0.01% | +24,046+34.9% | Added |
| SEI Investments Co | 96,911 | $2.56M | 0.00% | +8,783+10.0% | Added |
| State of Wisconsin Investment Board | 97,609 | $2.57M | 0.01% | −14,230−12.7% | Reduced |
| Price T Rowe Associates Inc | 101,366 | $2.67M | 0.00% | +4,736+4.9% | Added |
| Citigroup Inc | 106,301 | $2.80M | 0.00% | +106,301 | New |
| State of Tennessee, Treasury Department | 79,237 | $2.92M | 0.01% | −7,394−8.5% | Reduced |
| Neuberger Berman Group LLC | 119,741 | $3.16M | 0.00% | −129,823−52.0% | Reduced |
| California State Teachers Retirement System | 122,998 | $3.24M | 0.00% | +4,254+3.6% | Added |
| Susquehanna International Group, LLP | 134,280 | $3.54M | 0.00% | +7,522+5.9% | Added |
| ArrowMark Colorado Holdings LLC | 139,761 | $3.69M | 0.08% | −9,888−6.6% | Reduced |
| Trillium Asset Management, LLC | 136,021 | $3.73M | 0.11% | −30,523−18.3% | Reduced |
| Jane Street Group, LLC | 181,178 | $4.78M | 0.01% | −29,170−13.9% | Reduced |
| Legal & General Group Plc | 185,648 | $4.90M | 0.00% | −11,329−5.8% | Reduced |
| Retirement Systems of Alabama | 189,855 | $5.01M | 0.02% | −1,040−0.5% | Reduced |
| BNP Paribas Arbitrage, SA | 198,785 | $5.24M | 0.00% | +54,214+37.5% | Added |
| Pier Capital, LLC | 231,184 | $6.10M | 0.97% | −3,934−1.7% | Reduced |
| Nuveen, LLC | 241,927 | $6.38M | 0.00% | 00.0% | Unchanged |
| Swiss National Bank | 255,400 | $6.74M | 0.00% | +4,500+1.8% | Added |
| Peregrine Capital Management LLC | 270,888 | $7.15M | 0.22% | −3,589−1.3% | Reduced |
| UBS Group AG | 274,299 | $7.24M | 0.00% | −304,979−52.6% | Reduced |
| Rhumbline Advisers | 300,215 | $7.92M | 0.01% | −12,709−4.1% | Reduced |
| Two Sigma Investments, LP | 310,925 | $8.20M | 0.01% | +149,577+92.7% | Added |
| AQR Capital Management LLC | 327,973 | $8.65M | 0.00% | +77,589+31.0% | Added |
| UBS Asset Management Americas Inc | 330,709 | $8.72M | 0.00% | −6,769−2.0% | Reduced |
| T. Rowe Price Investment Management, Inc. | 349,349 | $9.22M | 0.01% | −735,849−67.8% | Reduced |
| Squarepoint Ops LLC | 353,991 | $9.34M | 0.02% | +14,065+4.1% | Added |
| Lightrock Netherlands B.V. | 354,390 | $9.35M | 1.98% | +354,390 | New |
| Allspring Global Investments Holdings, LLC | 356,026 | $9.58M | 0.02% | −4,160−1.2% | Reduced |
| Ameriprise Financial Inc | 373,490 | $9.85M | 0.00% | +46,568+14.2% | Added |
| Man Group plc | 387,105 | $10.2M | 0.02% | +171,818+79.8% | Added |
| Alyeska Investment Group, L.P. | 400,000 | $10.6M | 0.03% | +400,000 | New |
| Engineers Gate Manager LP | 419,600 | $11.1M | 0.13% | +350,434+506.7% | Added |
| Renaissance Technologies LLC | 436,200 | $11.5M | 0.02% | +436,200 | New |
| First Trust Advisors LP | 448,980 | $11.8M | 0.01% | −102,613−18.6% | Reduced |
| S Squared Technology, LLC | 457,451 | $12.1M | 4.67% | +60,000+15.1% | Added |
| Frontier Capital Management Co LLC | 524,931 | $13.8M | 0.15% | −370,866−41.4% | Reduced |
| Talos Asset Management LP | 560,200 | $14.8M | 2.62% | +560,200 | New |
| Bank of America Corp | 576,655 | $15.2M | 0.00% | −376,024−39.5% | Reduced |
| GW&K Investment Management, LLC | 669,146 | $17.7M | 0.15% | −14,359−2.1% | Reduced |
| Silvercrest Asset Management Group LLC | 675,703 | $17.8M | 0.12% | −9,358−1.4% | Reduced |
| Marshall Wace, LLP | 714,579 | $18.9M | 0.02% | +576,493+417.5% | Added |
| Bank of New York Mellon Corp | 750,586 | $19.8M | 0.00% | −42,929−5.4% | Reduced |
| Schonfeld Strategic Advisors LLC | 754,824 | $19.9M | 0.10% | +674,359+838.1% | Added |
| Goldman Sachs Group Inc | 796,329 | $21.0M | 0.00% | +450,983+130.6% | Added |
| Balyasny Asset Management LLC | 810,460 | $21.4M | 0.04% | +312,129+62.6% | Added |
| Loomis Sayles & Co L P | 829,239 | $21.9M | 0.03% | +27,216+3.4% | Added |
| Raymond James Financial Inc | 908,441 | $24.0M | 0.01% | −17,917−1.9% | Reduced |
| Voya Investment Management LLC | 940,358 | $24.8M | 0.02% | −1,718−0.2% | Reduced |
| Northern Trust Corp | 1,014,999 | $26.8M | 0.00% | +4,142+0.4% | Added |
| Wellington Management Group LLP | 1,106,337 | $29.2M | 0.01% | −54,580−4.7% | Reduced |
| Point72 Asset Management, L.P. | 1,119,265 | $29.5M | 0.05% | +132,465+13.4% | Added |
| Alliancebernstein L.P. | 1,148,652 | $30.3M | 0.01% | −1,541,844−57.3% | Reduced |
| Segall Bryant & Hamill, LLC | 1,248,310 | $32.9M | 0.45% | −75,416−5.7% | Reduced |
| Millennium Management LLC | 1,341,739 | $35.4M | 0.03% | +539,113+67.2% | Added |
| Charles Schwab Investment Management Inc | 1,362,418 | $35.9M | 0.01% | +67,425+5.2% | Added |
| Norges Bank | 1,457,805 | $38.5M | 0.00% | +1,457,805 | New |
| Principal Financial Group Inc | 1,742,296 | $46.0M | 0.02% | −171,778−9.0% | Reduced |
| Analog Century Management LP | 1,890,072 | $49.9M | 2.45% | +715,119+60.9% | Added |
| Nomura Asset Management International Inc. | 2,036,212 | $53.7M | 0.08% | +2,036,212 | New |
| Dimensional Fund Advisors LP | 2,140,147 | $56.5M | 0.01% | +169,597+8.6% | Added |
| Morgan Stanley | 2,233,136 | $58.9M | 0.00% | +294,107+15.2% | Added |
| Geode Capital Management, LLC | 2,393,968 | $63.2M | 0.00% | +24,839+1.0% | Added |
| Citadel Advisors LLC | 2,560,520 | $67.5M | 0.05% | +2,228,889+672.1% | Added |
| Adage Capital Partners GP, L.L.C. | 2,803,944 | $74.0M | 0.11% | +1,227,317+77.8% | Added |
| Clearbridge Investments, LLC | 2,916,785 | $76.9M | 0.06% | −16,021−0.5% | Reduced |
| State Street Corp | 5,359,488 | $141.4M | 0.00% | +78,203+1.5% | Added |
| JPMorgan Chase & Co | 7,347,422 | $193.8M | 0.01% | −383,845−5.0% | Reduced |
| Invesco Ltd. | 7,651,051 | $201.8M | 0.02% | +2,338,624+44.0% | Added |
| BlackRock, Inc. | 12,201,457 | $321.9M | 0.01% | +824,039+7.2% | Added |
| Capital Research Global Investors | 13,111,292 | $345.9M | 0.06% | −3,713,430−22.1% | Reduced |
| Vanguard Group Inc | 14,202,528 | $374.7M | 0.01% | −90,937−0.6% | Reduced |
| FMR LLC | 23,635,746 | $623.5M | 0.03% | −3,832,097−14.0% | Reduced |
| Macquarie Group Ltd | 0 | $0 | 0.00% | −2,197,274−100.0% | Sold out |
| Castleark Management LLC | 0 | $0 | 0.00% | −133,508−100.0% | Sold out |
| Susquehanna Portfolio Strategies, LLC | 0 | $0 | 0.00% | −115,830−100.0% | Sold out |
| Royce & Associates LP | 0 | $0 | 0.00% | −102,230−100.0% | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −89,935−100.0% | Sold out |
| Schroder Investment Management Group | 0 | $0 | 0.00% | −75,401−100.0% | Sold out |