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 |
|---|---|---|---|---|---|
| FMR LLC | 23,635,746 | $623.5M | 0.03% | −3,832,097−14.0% | Reduced |
| Vanguard Group Inc | 14,202,528 | $374.7M | 0.01% | −90,937−0.6% | Reduced |
| Capital Research Global Investors | 13,111,292 | $345.9M | 0.06% | −3,713,430−22.1% | Reduced |
| BlackRock, Inc. | 12,201,457 | $321.9M | 0.01% | +824,039+7.2% | Added |
| Invesco Ltd. | 7,651,051 | $201.8M | 0.02% | +2,338,624+44.0% | Added |
| JPMorgan Chase & Co | 7,347,422 | $193.8M | 0.01% | −383,845−5.0% | Reduced |
| State Street Corp | 5,359,488 | $141.4M | 0.00% | +78,203+1.5% | Added |
| Clearbridge Investments, LLC | 2,916,785 | $76.9M | 0.06% | −16,021−0.5% | Reduced |
| Adage Capital Partners GP, L.L.C. | 2,803,944 | $74.0M | 0.11% | +1,227,317+77.8% | Added |
| Citadel Advisors LLC | 2,560,520 | $67.5M | 0.05% | +2,228,889+672.1% | Added |
| Geode Capital Management, LLC | 2,393,968 | $63.2M | 0.00% | +24,839+1.0% | Added |
| Morgan Stanley | 2,233,136 | $58.9M | 0.00% | +294,107+15.2% | Added |
| Dimensional Fund Advisors LP | 2,140,147 | $56.5M | 0.01% | +169,597+8.6% | Added |
| Nomura Asset Management International Inc. | 2,036,212 | $53.7M | 0.08% | +2,036,212 | New |
| Analog Century Management LP | 1,890,072 | $49.9M | 2.45% | +715,119+60.9% | Added |
| Principal Financial Group Inc | 1,742,296 | $46.0M | 0.02% | −171,778−9.0% | Reduced |
| Norges Bank | 1,457,805 | $38.5M | 0.00% | +1,457,805 | New |
| Charles Schwab Investment Management Inc | 1,362,418 | $35.9M | 0.01% | +67,425+5.2% | Added |
| Millennium Management LLC | 1,341,739 | $35.4M | 0.03% | +539,113+67.2% | Added |
| Segall Bryant & Hamill, LLC | 1,248,310 | $32.9M | 0.45% | −75,416−5.7% | Reduced |
| Alliancebernstein L.P. | 1,148,652 | $30.3M | 0.01% | −1,541,844−57.3% | Reduced |
| Point72 Asset Management, L.P. | 1,119,265 | $29.5M | 0.05% | +132,465+13.4% | Added |
| Wellington Management Group LLP | 1,106,337 | $29.2M | 0.01% | −54,580−4.7% | Reduced |
| Northern Trust Corp | 1,014,999 | $26.8M | 0.00% | +4,142+0.4% | Added |
| Voya Investment Management LLC | 940,358 | $24.8M | 0.02% | −1,718−0.2% | Reduced |
| Raymond James Financial Inc | 908,441 | $24.0M | 0.01% | −17,917−1.9% | Reduced |
| Loomis Sayles & Co L P | 829,239 | $21.9M | 0.03% | +27,216+3.4% | Added |
| Balyasny Asset Management LLC | 810,460 | $21.4M | 0.04% | +312,129+62.6% | Added |
| Goldman Sachs Group Inc | 796,329 | $21.0M | 0.00% | +450,983+130.6% | Added |
| Schonfeld Strategic Advisors LLC | 754,824 | $19.9M | 0.10% | +674,359+838.1% | Added |
| Bank of New York Mellon Corp | 750,586 | $19.8M | 0.00% | −42,929−5.4% | Reduced |
| Marshall Wace, LLP | 714,579 | $18.9M | 0.02% | +576,493+417.5% | Added |
| Silvercrest Asset Management Group LLC | 675,703 | $17.8M | 0.12% | −9,358−1.4% | Reduced |
| GW&K Investment Management, LLC | 669,146 | $17.7M | 0.15% | −14,359−2.1% | Reduced |
| Bank of America Corp | 576,655 | $15.2M | 0.00% | −376,024−39.5% | Reduced |
| Talos Asset Management LP | 560,200 | $14.8M | 2.62% | +560,200 | New |
| Frontier Capital Management Co LLC | 524,931 | $13.8M | 0.15% | −370,866−41.4% | Reduced |
| S Squared Technology, LLC | 457,451 | $12.1M | 4.67% | +60,000+15.1% | Added |
| First Trust Advisors LP | 448,980 | $11.8M | 0.01% | −102,613−18.6% | Reduced |
| Renaissance Technologies LLC | 436,200 | $11.5M | 0.02% | +436,200 | New |
| Engineers Gate Manager LP | 419,600 | $11.1M | 0.13% | +350,434+506.7% | Added |
| Alyeska Investment Group, L.P. | 400,000 | $10.6M | 0.03% | +400,000 | New |
| Man Group plc | 387,105 | $10.2M | 0.02% | +171,818+79.8% | Added |
| Ameriprise Financial Inc | 373,490 | $9.85M | 0.00% | +46,568+14.2% | Added |
| Allspring Global Investments Holdings, LLC | 356,026 | $9.58M | 0.02% | −4,160−1.2% | Reduced |
| Lightrock Netherlands B.V. | 354,390 | $9.35M | 1.98% | +354,390 | New |
| Squarepoint Ops LLC | 353,991 | $9.34M | 0.02% | +14,065+4.1% | Added |
| T. Rowe Price Investment Management, Inc. | 349,349 | $9.22M | 0.01% | −735,849−67.8% | Reduced |
| UBS Asset Management Americas Inc | 330,709 | $8.72M | 0.00% | −6,769−2.0% | Reduced |
| AQR Capital Management LLC | 327,973 | $8.65M | 0.00% | +77,589+31.0% | Added |
| Two Sigma Investments, LP | 310,925 | $8.20M | 0.01% | +149,577+92.7% | Added |
| Rhumbline Advisers | 300,215 | $7.92M | 0.01% | −12,709−4.1% | Reduced |
| UBS Group AG | 274,299 | $7.24M | 0.00% | −304,979−52.6% | Reduced |
| Peregrine Capital Management LLC | 270,888 | $7.15M | 0.22% | −3,589−1.3% | Reduced |
| Swiss National Bank | 255,400 | $6.74M | 0.00% | +4,500+1.8% | Added |
| Nuveen, LLC | 241,927 | $6.38M | 0.00% | 00.0% | Unchanged |
| Pier Capital, LLC | 231,184 | $6.10M | 0.97% | −3,934−1.7% | Reduced |
| BNP Paribas Arbitrage, SA | 198,785 | $5.24M | 0.00% | +54,214+37.5% | Added |
| Retirement Systems of Alabama | 189,855 | $5.01M | 0.02% | −1,040−0.5% | Reduced |
| Legal & General Group Plc | 185,648 | $4.90M | 0.00% | −11,329−5.8% | Reduced |
| Jane Street Group, LLC | 181,178 | $4.78M | 0.01% | −29,170−13.9% | Reduced |
| Trillium Asset Management, LLC | 136,021 | $3.73M | 0.11% | −30,523−18.3% | Reduced |
| ArrowMark Colorado Holdings LLC | 139,761 | $3.69M | 0.08% | −9,888−6.6% | Reduced |
| Susquehanna International Group, LLP | 134,280 | $3.54M | 0.00% | +7,522+5.9% | Added |
| California State Teachers Retirement System | 122,998 | $3.24M | 0.00% | +4,254+3.6% | Added |
| Neuberger Berman Group LLC | 119,741 | $3.16M | 0.00% | −129,823−52.0% | Reduced |
| State of Tennessee, Treasury Department | 79,237 | $2.92M | 0.01% | −7,394−8.5% | Reduced |
| Citigroup Inc | 106,301 | $2.80M | 0.00% | +106,301 | New |
| Price T Rowe Associates Inc | 101,366 | $2.67M | 0.00% | +4,736+4.9% | Added |
| State of Wisconsin Investment Board | 97,609 | $2.57M | 0.01% | −14,230−12.7% | Reduced |
| SEI Investments Co | 96,911 | $2.56M | 0.00% | +8,783+10.0% | Added |
| State of New Jersey Common Pension Fund D | 92,928 | $2.45M | 0.01% | +24,046+34.9% | Added |
| State Board of Administration of Florida Retirement System | 92,797 | $2.45M | 0.00% | 00.0% | Unchanged |
| Summit Trail Advisors, LLC | 92,506 | $2.44M | 0.04% | +10,273+12.5% | Added |
| HRT Financial LP | 90,344 | $2.38M | 0.01% | +15,949+21.4% | Added |
| Granahan Investment Management Inc | 89,857 | $2.37M | 0.10% | +89,857 | New |
| Barclays PLC | 88,300 | $2.33M | 0.00% | −62,725−41.5% | Reduced |
| Candriam Luxembourg S.C.A. | 87,888 | $2.32M | 0.01% | −1,287−1.4% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 83,810 | $2.21M | 0.00% | −6,782−7.5% | Reduced |
| Manufacturers Life Insurance Company, The | 82,250 | $2.17M | 0.00% | −2,387−2.8% | Reduced |
| Massachusetts Financial Services Co | 80,157 | $2.11M | 0.00% | +39,767+98.5% | Added |
| Trexquant Investment LP | 79,486 | $2.10M | 0.02% | −109,962−58.0% | Reduced |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 74,366 | $2.00M | 0.00% | −31,601−29.8% | Reduced |
| Gotham Asset Management, LLC | 73,093 | $1.93M | 0.01% | −51,395−41.3% | Reduced |
| Two Sigma Advisers, LP | 70,900 | $1.87M | 0.00% | +60,100+556.5% | Added |
| Wells Fargo & Company | 65,373 | $1.72M | 0.00% | −86,190−56.9% | Reduced |
| Quantinno Capital Management LP | 65,353 | $1.72M | 0.00% | +6,775+11.6% | Added |
| Hel Ved Capital Management Ltd | 62,850 | $1.66M | 0.57% | +62,850 | New |
| MetLife Investment Management | 60,588 | $1.60M | 0.01% | −3,118−4.9% | Reduced |
| Janus Henderson Group PLC | 57,329 | $1.51M | 0.00% | 00.0% | Unchanged |
| Van Eck Associates Corp | 55,496 | $1.46M | 0.00% | −5,211−8.6% | Reduced |
| D. E. Shaw & Co., Inc. | 55,304 | $1.46M | 0.00% | +55,304 | New |
| Amalgamated Bank | 54,325 | $1.43M | 0.01% | −2,442−4.3% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 52,277 | $1.38M | 0.01% | −1,805−3.3% | Reduced |
| Mutual of America Capital Management LLC | 51,618 | $1.36M | 0.01% | −5,638−9.8% | Reduced |
| Treasurer of the State of North Carolina | 51,565 | $1.36M | 0.00% | −3,772−6.8% | Reduced |
| New York State Common Retirement Fund | 50,938 | $1.34M | 0.00% | 00.0% | Unchanged |
| Qube Research & Technologies Ltd | 48,097 | $1.27M | 0.00% | +48,097 | New |
| Yousif Capital Management, LLC | 38,286 | $1.26M | 0.01% | −463−1.2% | Reduced |
| Guggenheim Capital LLC | 45,571 | $1.20M | 0.01% | +25,337+125.2% | Added |