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, Q1 2026
Institutional positions in Allegro Microsystems, Inc. as of Mar 31, 2026. 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
- 322
- +33 vs. Q4 2025
- Shares held
- 138.3M
- +17.5M (+14.5%) vs. Q4 2025
- Total value
- $4.32B
- +$1.13B (+35.5%) vs. Q4 2025
- New holders
- 69
- 126 more added
- Sold out
- 36
- 86 more reduced
5 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Allegro Microsystems, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| FMR LLC | 27,421,206 | $864.6M | 0.05% | +3,785,460+16.0% | Added |
| BlackRock, Inc. | 12,494,868 | $394.0M | 0.01% | +293,411+2.4% | Added |
| Capital Research Global Investors | 12,435,558 | $392.1M | 0.06% | −675,734−5.2% | Reduced |
| Invesco Ltd. | 8,751,481 | $275.9M | 0.03% | +1,100,430+14.4% | Added |
| Vanguard Portfolio Management LLC | 7,920,042 | $249.7M | 0.01% | +7,920,042 | New |
| JPMorgan Chase & Co | 8,652,068 | $242.6M | 0.02% | +1,304,646+17.8% | Added |
| Vanguard Capital Management LLC | 5,464,718 | $172.3M | 0.00% | +5,464,718 | New |
| State Street Corp | 5,228,104 | $164.8M | 0.01% | −131,384−2.5% | Reduced |
| Clearbridge Investments, LLC | 2,863,710 | $90.3M | 0.08% | −53,075−1.8% | Reduced |
| Geode Capital Management, LLC | 2,456,820 | $77.5M | 0.00% | +62,852+2.6% | Added |
| Morgan Stanley | 2,275,285 | $71.7M | 0.00% | +42,149+1.9% | Added |
| Dimensional Fund Advisors LP | 2,170,487 | $68.4M | 0.01% | +30,340+1.4% | Added |
| Nomura Asset Management International Inc. | 2,080,641 | $65.6M | 0.11% | +44,429+2.2% | Added |
| Principal Financial Group Inc | 1,790,466 | $56.5M | 0.03% | +48,170+2.8% | Added |
| Loomis Sayles & Co L P | 1,674,108 | $52.8M | 0.07% | +844,869+101.9% | Added |
| Adage Capital Partners GP, L.L.C. | 1,464,737 | $46.2M | 0.07% | −1,339,207−47.8% | Reduced |
| Voya Investment Management LLC | 1,459,271 | $46.0M | 0.05% | +518,913+55.2% | Added |
| Alliancebernstein L.P. | 1,723,370 | $45.5M | 0.01% | +574,718+50.0% | Added |
| Goldman Sachs Group Inc | 1,437,215 | $45.3M | 0.01% | +640,886+80.5% | Added |
| Charles Schwab Investment Management Inc | 1,390,606 | $43.8M | 0.01% | +28,188+2.1% | Added |
| Northern Trust Corp | 1,045,541 | $33.0M | 0.00% | +30,542+3.0% | Added |
| Segall Bryant & Hamill, LLC | 1,044,984 | $32.9M | 0.47% | −203,326−16.3% | Reduced |
| Raymond James Financial Inc | 995,753 | $31.4M | 0.01% | +87,312+9.6% | Added |
| Nuveen, LLC | 947,502 | $29.9M | 0.01% | +705,575+291.6% | Added |
| Kennedy Capital Management, Inc. | 910,039 | $28.7M | 0.61% | +865,179+1,928.6% | Added |
| Bank of America Corp | 855,453 | $27.0M | 0.00% | +278,798+48.3% | Added |
| Vanguard Fiduciary Trust Co | 765,886 | $24.1M | 0.01% | +765,886 | New |
| Bank of New York Mellon Corp | 743,292 | $23.4M | 0.00% | −7,294−1.0% | Reduced |
| Marshall Wace, LLP | 739,780 | $23.3M | 0.02% | +25,201+3.5% | Added |
| Aperture Investors, LLC | 709,674 | $22.4M | 2.83% | +709,674 | New |
| Silvercrest Asset Management Group LLC | 707,891 | $22.3M | 0.16% | +32,188+4.8% | Added |
| Wellington Management Group LLP | 673,096 | $21.2M | 0.00% | −433,241−39.2% | Reduced |
| GW&K Investment Management, LLC | 659,576 | $20.8M | 0.18% | −9,570−1.4% | Reduced |
| Two Sigma Investments, LP | 639,841 | $20.2M | 0.02% | +328,916+105.8% | Added |
| T. Rowe Price Investment Management, Inc. | 561,344 | $17.7M | 0.01% | +211,995+60.7% | Added |
| Lord, Abbett & Co. LLC | 530,455 | $16.7M | 0.05% | +530,455 | New |
| Lightrock Netherlands B.V. | 507,990 | $16.0M | 3.61% | +153,600+43.3% | Added |
| Talos Asset Management LP | 493,173 | $15.5M | 2.66% | −67,027−12.0% | Reduced |
| S Squared Technology, LLC | 457,451 | $14.4M | 5.46% | 00.0% | Unchanged |
| UBS Group AG | 435,381 | $13.7M | 0.00% | +161,082+58.7% | Added |
| First Trust Advisors LP | 414,897 | $13.1M | 0.01% | −34,083−7.6% | Reduced |
| Citadel Advisors LLC | 399,444 | $12.6M | 0.01% | −2,161,076−84.4% | Reduced |
| Ameriprise Financial Inc | 359,282 | $11.3M | 0.00% | −14,208−3.8% | Reduced |
| UBS Asset Management Americas Inc | 345,057 | $10.9M | 0.00% | +14,348+4.3% | Added |
| AQR Capital Management LLC | 345,126 | $10.3M | 0.00% | +17,153+5.2% | Added |
| Allspring Global Investments Holdings, LLC | 307,624 | $10.2M | 0.02% | −48,402−13.6% | Reduced |
| Gotham Asset Management, LLC | 312,246 | $9.85M | 0.03% | +239,153+327.2% | Added |
| Rhumbline Advisers | 308,407 | $9.72M | 0.01% | +8,192+2.7% | Added |
| Jacobs Levy Equity Management, Inc | 308,102 | $9.71M | 0.04% | +308,102 | New |
| Man Group plc | 306,349 | $9.66M | 0.02% | −80,756−20.9% | Reduced |
| Sirios Capital Management L P | 298,421 | $9.41M | 1.14% | +298,421 | New |
| Frontier Capital Management Co LLC | 264,031 | $8.32M | 0.09% | −260,900−49.7% | Reduced |
| HRT Financial LP | 261,772 | $8.25M | 0.02% | +171,428+189.8% | Added |
| Peregrine Capital Management LLC | 259,764 | $8.19M | 0.30% | −11,124−4.1% | Reduced |
| Swiss National Bank | 256,400 | $8.08M | 0.00% | +1,000+0.4% | Added |
| Balyasny Asset Management LLC | 245,910 | $7.75M | 0.02% | −564,550−69.7% | Reduced |
| Pier Capital, LLC | 226,566 | $7.14M | 1.18% | −4,618−2.0% | Reduced |
| SEI Investments Co | 218,976 | $6.90M | 0.01% | +122,065+126.0% | Added |
| Granahan Investment Management Inc | 215,001 | $6.78M | 0.33% | +125,144+139.3% | Added |
| G2 Investment Partners Management LLC | 208,569 | $6.58M | 1.62% | +208,569 | New |
| Retirement Systems of Alabama | 193,195 | $6.09M | 0.02% | +3,340+1.8% | Added |
| Kettle Hill Capital Management, LLC | 181,531 | $5.72M | 1.43% | +181,531 | New |
| Roubaix Capital, LLC | 169,993 | $5.36M | 2.50% | +169,993 | New |
| Legal & General Group Plc | 164,671 | $5.19M | 0.00% | −20,977−11.3% | Reduced |
| California State Teachers Retirement System | 149,826 | $4.72M | 0.00% | +26,828+21.8% | Added |
| Castleark Management LLC | 147,420 | $4.65M | 0.15% | +147,420 | New |
| Trillium Asset Management, LLC | 127,557 | $4.44M | 0.15% | −8,464−6.2% | Reduced |
| Quantinno Capital Management LP | 133,902 | $4.22M | 0.01% | +68,549+104.9% | Added |
| Trexquant Investment LP | 133,800 | $4.22M | 0.03% | +54,314+68.3% | Added |
| Walleye Capital LLC | 130,668 | $4.12M | 0.03% | +127,063+3,524.6% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 127,393 | $4.02M | 0.01% | +43,583+52.0% | Added |
| Renaissance Technologies LLC | 123,900 | $3.91M | 0.01% | −312,300−71.6% | Reduced |
| Canada Pension Plan Investment Board | 122,000 | $3.85M | 0.00% | +104,000+577.8% | Added |
| ArrowMark Colorado Holdings LLC | 120,784 | $3.81M | 0.10% | −18,977−13.6% | Reduced |
| Vanguard Asset Management, Ltd | 116,069 | $3.66M | 0.00% | +116,069 | New |
| Susquehanna International Group, LLP | 115,383 | $3.64M | 0.00% | −18,897−14.1% | Reduced |
| Price T Rowe Associates Inc | 113,799 | $3.59M | 0.00% | +12,433+12.3% | Added |
| Citigroup Inc | 106,154 | $3.35M | 0.00% | −147−0.1% | Reduced |
| Russell Investments Group, Ltd. | 96,083 | $3.03M | 0.00% | +74,834+352.2% | Added |
| Brevan Howard Capital Management LP | 95,099 | $3.00M | 0.03% | +95,099 | New |
| State of Wisconsin Investment Board | 94,953 | $2.99M | 0.01% | −2,656−2.7% | Reduced |
| State Board of Administration of Florida Retirement System | 92,797 | $2.93M | 0.01% | 00.0% | Unchanged |
| Candriam Luxembourg S.C.A. | 86,073 | $2.71M | 0.01% | −1,815−2.1% | Reduced |
| Manufacturers Life Insurance Company, The | 81,072 | $2.56M | 0.00% | −1,178−1.4% | Reduced |
| State of Tennessee, Treasury Department | 79,237 | $2.50M | 0.01% | 00.0% | Unchanged |
| Wells Fargo & Company | 73,461 | $2.32M | 0.00% | +8,088+12.4% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 70,956 | $2.24M | 0.00% | −3,410−4.6% | Reduced |
| Massachusetts Financial Services Co | 69,297 | $2.18M | 0.00% | −10,860−13.5% | Reduced |
| XTX Topco Ltd | 68,567 | $2.16M | 0.04% | +42,929+167.4% | Added |
| Entropy Technologies, LP | 67,719 | $2.14M | 0.10% | +31,824+88.7% | Added |
| State of New Jersey Common Pension Fund D | 62,022 | $1.96M | 0.01% | −30,906−33.3% | Reduced |
| MetLife Investment Management | 61,051 | $1.92M | 0.01% | +463+0.8% | Added |
| Neuberger Berman Group LLC | 57,977 | $1.83M | 0.00% | −61,764−51.6% | Reduced |
| Janus Henderson Group PLC | 57,329 | $1.81M | 0.00% | 00.0% | Unchanged |
| Sphera Management Technology Funds Ltd | 57,150 | $1.80M | 1.02% | +17,150+42.9% | Added |
| Amalgamated Bank | 55,796 | $1.76M | 0.01% | +1,471+2.7% | Added |
| Needham Investment Management LLC | 55,000 | $1.73M | 0.09% | +15,000+37.5% | Added |
| BW Gestao de Investimentos Ltda. | 55,000 | $1.73M | 0.08% | +55,000 | New |
| Summit Partners Public Asset Management, LLC | 54,000 | $1.70M | 0.08% | +54,000 | New |
| Guggenheim Capital LLC | 53,690 | $1.69M | 0.01% | +8,119+17.8% | Added |