Allegro MicrosystemsALGM
13F holders, Q1 2026 (March 31)322holders +28
61new positions
34sold out
8famous investors
$31.25avg. 13F price*
At the end of Q1 2026, 322 institutions reported holding Allegro Microsystems Inc. (ALGM) in their 13F filings, up 28 from Q4 2025. 61 opened new positions and 34 sold out. The largest holders were FMR LLC ($864.6M), BlackRock, Inc. ($394.0M) and Capital Research Global Investors ($392.1M). 8 famous investors held it, including Joel Greenblatt (0.0% of Gotham Asset Management's portfolio), Lee Ainslie (0.0% of Maverick Capital's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Allegro Microsystems Inc.
- CUSIP
- 01749D105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 61 | $102.9M |
| Exits | 34 | $110.4M |
All 13F filers, Q4 2025 → Q1 2026: 17,046,866 shares bought and 13,834,672 shares sold, net +3,212,194 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 322 holders
| FMR LLC | 0.05% | Add +16.0% | 27,421,206 | $864.6M |
| BlackRock, Inc. | 0.01% | Add +2.4% | 12,494,868 | $394.0M |
| Capital Research Global Investors | 0.06% | Reduce -5.2% | 12,435,558 | $392.1M |
| Invesco Ltd. | 0.03% | Add +14.4% | 8,751,481 | $275.9M |
| Vanguard Portfolio Management LLC | 0.01% | — | 7,920,042 | $249.7M |
| JPMorgan Chase & Co. | 0.02% | Add +17.8% | 8,652,068 | $242.6M |
| Vanguard Capital Management LLC | 0.00% | — | 5,464,718 | $172.3M |
| State Street Corp. | 0.01% | Reduce -2.5% | 5,228,104 | $164.8M |
| Clearbridge Investments, LLC | 0.08% | Reduce -1.8% | 2,863,710 | $90.3M |
| Geode Capital Management, LLC | 0.00% | Add +2.6% | 2,456,820 | $77.5M |
| Morgan Stanley | 0.00% | Add +1.9% | 2,275,285 | $71.7M |
| Dimensional Fund Advisors LP | 0.01% | Add +1.4% | 2,170,487 | $68.4M |
| Nomura Asset Management International Inc. | 0.11% | Add +2.2% | 2,080,641 | $65.6M |
| Principal Financial Group Inc. | 0.03% | Add +2.8% | 1,790,466 | $56.5M |
| Loomis Sayles & Co. L P | 0.07% | Add +101.9% | 1,674,108 | $52.8M |
| Adage Capital Partners Gp, L.L.C. | 0.07% | Reduce -47.8% | 1,464,737 | $46.2M |
| Voya Investment Management LLC | 0.06% | Add +55.2% | 1,459,271 | $46.0M |
| Alliancebernstein L.P. | 0.01% | Add +50.0% | 1,723,370 | $45.5M |
| Goldman Sachs Group Inc. | 0.01% | Add +80.5% | 1,437,215 | $45.3M |
| Charles Schwab Investment Management Inc. | 0.01% | Add +2.1% | 1,390,606 | $43.8M |
| Northern Trust Corp. | 0.00% | Add +3.0% | 1,045,541 | $33.0M |
| Segall Bryant & Hamill, LLC | 0.47% | Reduce -16.3% | 1,044,984 | $32.9M |
| Raymond James Financial Inc. | 0.01% | Add +9.6% | 995,753 | $31.4M |
| Nuveen, LLC | 0.01% | Add +291.6% | 947,502 | $29.9M |
| Kennedy Capital Management LLC | 0.61% | Add +1928.6% | 910,039 | $28.7M |
| Bank of America Corp. | 0.00% | Add +48.4% | 855,453 | $27.0M |
| Vanguard Fiduciary Trust Co. | 0.01% | — | 765,886 | $24.1M |
| Bank of New York Mellon Corp | 0.00% | Reduce -1.0% | 743,292 | $23.4M |
| Marshall Wace, LLP | 0.03% | Add +3.5% | 739,780 | $23.3M |
| Aperture Investors, LLC | 2.83% | New | 709,674 | $22.4M |
| Silvercrest Asset Management Group LLC | 0.16% | Add +4.8% | 707,891 | $22.3M |
| Wellington Management Group LLP | 0.00% | Reduce -39.2% | 673,096 | $21.2M |
| GW&K Investment Management, LLC | 0.18% | Reduce -1.4% | 659,576 | $20.8M |
| Two Sigma Investments, LP | 0.02% | Add +105.8% | 639,841 | $20.2M |
| T. Rowe Price Investment Management, Inc. | 0.01% | Add +60.7% | 561,344 | $17.7M |
| Lord, Abbett & Co. LLC | 0.06% | New | 530,455 | $16.7M |
| Lightrock Netherlands B.V. | 3.42% | Add +43.3% | 507,990 | $16.0M |
| Talos Eurisko Asset Management LP | 2.66% | Reduce -12.0% | 493,173 | $15.5M |
| S Squared Technology, LLC | 5.46% | No change | 457,451 | $14.4M |
| UBS Group AG | 0.00% | Add +58.7% | 435,381 | $13.7M |
| First Trust Advisors LP | 0.01% | Reduce -7.6% | 414,897 | $13.1M |
| Citadel Advisors | 0.01% | Reduce -84.4% | 399,444 | $12.6M |
| Ameriprise Financial Inc. | 0.00% | Reduce -3.8% | 359,282 | $11.3M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +4.3% | 345,057 | $10.9M |
| AQR Capital Management | 0.00% | Add +5.2% | 345,126 | $10.3M |
| Allspring Global Investments Holdings, LLC | 0.02% | Reduce -13.6% | 307,624 | $10.2M |
| Gotham Asset Management | 0.03% | Add +327.2% | 312,246 | $9.8M |
| Rhumbline Advisers | 0.01% | Add +2.7% | 308,407 | $9.7M |
| Jacobs Levy Equity Management, Inc. | 0.04% | New | 308,102 | $9.7M |
| Man Group plc | 0.02% | Reduce -20.9% | 306,349 | $9.7M |
| Sirios Capital Management L P | 1.14% | New | 298,421 | $9.4M |
| Frontier Capital Management Co. LLC | 0.09% | Reduce -49.7% | 264,031 | $8.3M |
| HRT Financial LP | 0.02% | Add +189.8% | 261,772 | $8.3M |
| Peregrine Capital Management LLC | 0.30% | Reduce -4.1% | 259,764 | $8.2M |
| Swiss National Bank | 0.00% | Add +0.4% | 256,400 | $8.1M |
| Balyasny Asset Management L.P. | 0.02% | Reduce -69.7% | 245,910 | $7.8M |
| Pier Capital, LLC | 1.18% | Reduce -2.0% | 226,566 | $7.1M |
| Sei Investments Co. | 0.01% | Add +126.0% | 218,976 | $6.9M |
| Granahan Investment Management, LLC | 0.33% | Add +139.3% | 215,001 | $6.8M |
| G2 Investment Partners Management LLC | 1.62% | New | 208,569 | $6.6M |
| Retirement Systems of Alabama | 0.02% | Add +1.8% | 193,195 | $6.1M |
| Kettle Hill Capital Management, LLC | 1.43% | New | 181,531 | $5.7M |
| Roubaix Capital, LLC | 2.50% | New | 169,993 | $5.4M |
| Legal & General Group Plc | 0.00% | Reduce -11.3% | 164,671 | $5.2M |
| California State Teachers Retirement System | 0.01% | Add +21.8% | 149,826 | $4.7M |
| Castleark Management LLC | 0.15% | New | 147,420 | $4.6M |
| Trillium Asset Management, LLC | 0.15% | Reduce -6.2% | 127,557 | $4.4M |
| Quantinno Capital Management LP | 0.01% | Add +104.9% | 133,902 | $4.2M |
| Trexquant Investment LP | 0.03% | Add +68.3% | 133,800 | $4.2M |
| Walleye Capital LLC | 0.03% | Add +3524.6% | 130,668 | $4.1M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.01% | Add +52.0% | 127,393 | $4.0M |
| Renaissance Technologies | 0.01% | Reduce -71.6% | 123,900 | $3.9M |
| Canada Pension Plan Investment Board | 0.00% | Add +577.8% | 122,000 | $3.8M |
| ArrowMark Colorado Holdings LLC | 0.10% | Reduce -13.6% | 120,784 | $3.8M |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | — | 116,069 | $3.7M |
| Susquehanna International Group, LLP | 0.00% | Reduce -14.1% | 115,383 | $3.6M |
| T. Rowe Price Associates Inc. | 0.00% | Add +12.3% | 113,799 | $3.6M |
| Citigroup Inc. | 0.00% | Reduce -0.1% | 106,154 | $3.3M |
| Russell Investments Group, Ltd. | 0.00% | Add +352.2% | 96,083 | $3.0M |
| Brevan Howard Capital Management LP | 0.03% | New | 95,099 | $3.0M |
| State of Wisconsin Investment Board | 0.01% | Reduce -2.7% | 94,953 | $3.0M |
| State Board of Administration of Florida Retirement System | 0.01% | No change | 92,797 | $2.9M |
| Candriam S.C.A. | 0.01% | Reduce -2.1% | 86,073 | $2.7M |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -1.4% | 81,072 | $2.6M |
| State of Tennessee, Department of Treasury | 0.01% | No change | 79,237 | $2.5M |
| Wells Fargo & Company | 0.00% | Add +12.4% | 73,461 | $2.3M |
| Mitsubishi UFJ Asset Management Co., Ltd. | 0.00% | Reduce -4.6% | 70,956 | $2.2M |
| Massachusetts Financial Services Co. | 0.00% | Reduce -13.6% | 69,297 | $2.2M |
| XTX Topco Ltd | 0.04% | Add +167.4% | 68,567 | $2.2M |
| Entropy Technologies, LP | 0.10% | Add +88.7% | 67,719 | $2.1M |
| State of New Jersey Common Pension Fund D | 0.01% | Reduce -33.3% | 62,022 | $2.0M |
| MetLife Investment Management, LLC | 0.01% | Add +0.8% | 61,051 | $1.9M |
| Neuberger Berman Group LLC | 0.00% | Reduce -51.6% | 57,977 | $1.8M |
| Janus Henderson Group PLC | 0.00% | No change | 57,329 | $1.8M |
| Sphera Management Technology Funds Ltd | 1.02% | Add +42.9% | 57,150 | $1.8M |
| Amalgamated Bank | 0.01% | Add +2.7% | 55,796 | $1.8M |
| Needham Investment Management LLC | 0.09% | Add +37.5% | 55,000 | $1.7M |
| BW Gestao de Investimentos Ltda. | 0.08% | New | 55,000 | $1.7M |
| Summit Partners Public Asset Management, LLC | 0.08% | New | 54,000 | $1.7M |
| Guggenheim Capital LLC | 0.01% | Add +17.8% | 53,690 | $1.7M |
"% of holder's portfolio" is ALGM's weight in each manager's 13F, not the share of Allegro Microsystems Inc. the manager owns.