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, Q2 2026
Institutional positions in Allegro Microsystems, Inc. as of Jun 30, 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
- 375
- +58 vs. Q1 2026
- Shares held
- 148.2M
- +9.97M (+7.2%) vs. Q1 2026
- Total value
- $10.2B
- +$5.91B (+136.7%) vs. Q1 2026
- New holders
- 101
- 117 more added
- Sold out
- 43
- 107 more reduced
5 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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 | $3.61B |
| Q3 2025 | 296 | $4.19B |
| Q2 2025 | 274 | $5.02B |
| Q1 2025 | 292 | $3.98B |
| Q4 2024 | 256 | $3.11B |
| Q3 2024 | 248 | $3.58B |
| Q2 2024 | 268 | $3.29B |
| Q1 2024 | 277 | $3.15B |
| Q4 2023 | 288 | $3.08B |
| Q3 2023 | 312 | $3.01B |
| Q2 2023 | 353 | $4.47B |
| Q1 2023 | 314 | $5.11B |
| Q4 2022 | 219 | $2.89B |
| Q3 2022 | 170 | $1.98B |
| Q2 2022 | 172 | $1.83B |
| Q1 2022 | 173 | $2.54B |
| Q4 2021 | 165 | $3.18B |
| Q3 2021 | 153 | $2.71B |
| Q2 2021 | 128 | $2.22B |
| Q1 2021 | 123 | $1.98B |
Institutions, Q2 2026
Shares, value and share of portfolio for each institution holding Allegro Microsystems, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| FMR LLC | 25,581,021 | $1.78B | 0.08% | −1,840,185−6.7% | Reduced |
| BlackRock, Inc. | 13,889,324 | $967.0M | 0.01% | +1,394,456+11.2% | Added |
| Invesco Ltd. | 13,678,393 | $952.3M | 0.08% | +4,926,912+56.3% | Added |
| JPMorgan Chase & Co | 12,723,790 | $844.9M | 0.05% | +4,071,722+47.1% | Added |
| Capital Research Global Investors | 12,006,396 | $835.9M | 0.12% | −429,162−3.5% | Reduced |
| Vanguard Portfolio Management LLC | 7,668,472 | $533.9M | 0.02% | −251,570−3.2% | Reduced |
| State Street Corp | 5,676,421 | $395.2M | 0.01% | +448,317+8.6% | Added |
| Vanguard Capital Management LLC | 5,508,806 | $383.5M | 0.01% | +44,088+0.8% | Added |
| Price T Rowe Associates Inc | 3,710,288 | $258.3M | 0.03% | +3,596,489+3,160.4% | Added |
| Clearbridge Investments, LLC | 2,946,239 | $205.1M | 0.17% | +82,529+2.9% | Added |
| Geode Capital Management, LLC | 2,644,929 | $184.2M | 0.01% | +188,109+7.7% | Added |
| Dimensional Fund Advisors LP | 2,123,963 | $147.8M | 0.03% | −46,524−2.1% | Reduced |
| Morgan Stanley | 1,809,335 | $126.0M | 0.01% | −465,950−20.5% | Reduced |
| Loomis Sayles & Co L P | 1,619,931 | $112.8M | 0.14% | −54,177−3.2% | Reduced |
| Goldman Sachs Group Inc | 1,575,057 | $109.7M | 0.01% | +137,842+9.6% | Added |
| Principal Financial Group Inc | 1,489,791 | $103.7M | 0.05% | −300,675−16.8% | Reduced |
| Massachusetts Financial Services Co | 1,443,495 | $100.5M | 0.03% | +1,374,198+1,983.1% | Added |
| Charles Schwab Investment Management Inc | 1,360,525 | $94.7M | 0.01% | −30,081−2.2% | Reduced |
| Norges Bank | 1,294,958 | $90.2M | 0.01% | +1,294,958 | New |
| Northern Trust Corp | 1,167,135 | $81.3M | 0.01% | +121,594+11.6% | Added |
| Nomura Asset Management International Inc. | 1,159,503 | $80.7M | 0.12% | −921,138−44.3% | Reduced |
| Adage Capital Partners GP, L.L.C. | 1,121,950 | $78.1M | 0.11% | −342,787−23.4% | Reduced |
| Voya Investment Management LLC | 966,871 | $67.3M | 0.06% | −492,400−33.7% | Reduced |
| Raymond James Financial Inc | 928,060 | $64.6M | 0.02% | −67,693−6.8% | Reduced |
| Bank of America Corp | 921,728 | $64.2M | 0.00% | +66,275+7.7% | Added |
| Wellington Management Group LLP | 814,937 | $56.7M | 0.01% | +141,841+21.1% | Added |
| Vanguard Fiduciary Trust Co | 800,030 | $55.7M | 0.01% | +34,144+4.5% | Added |
| UBS Group AG | 780,945 | $54.4M | 0.01% | +345,564+79.4% | Added |
| Nuveen, LLC | 722,645 | $50.3M | 0.01% | −224,857−23.7% | Reduced |
| Bank of New York Mellon Corp | 716,952 | $49.9M | 0.01% | −26,340−3.5% | Reduced |
| Kennedy Capital Management, Inc. | 689,668 | $48.0M | 0.85% | −220,371−24.2% | Reduced |
| First Trust Advisors LP | 684,022 | $47.6M | 0.03% | +269,125+64.9% | Added |
| GW&K Investment Management, LLC | 666,812 | $46.4M | 0.36% | +7,236+1.1% | Added |
| Ameriprise Financial Inc | 608,793 | $43.0M | 0.01% | +249,511+69.4% | Added |
| Allspring Global Investments Holdings, LLC | 620,540 | $39.2M | 0.06% | +312,916+101.7% | Added |
| Alliancebernstein L.P. | 1,201,203 | $37.9M | 0.01% | −522,167−30.3% | Reduced |
| Silvercrest Asset Management Group LLC | 537,082 | $37.4M | 0.25% | −170,809−24.1% | Reduced |
| Lord, Abbett & Co. LLC | 525,863 | $36.6M | 0.10% | −4,592−0.9% | Reduced |
| T. Rowe Price Investment Management, Inc. | 517,648 | $36.0M | 0.02% | −43,696−7.8% | Reduced |
| AQR Capital Management LLC | 493,753 | $33.4M | 0.01% | +148,627+43.1% | Added |
| Aperture Investors, LLC | 443,427 | $30.9M | 3.28% | −266,247−37.5% | Reduced |
| Braun Stacey Associates Inc | 366,493 | $25.5M | 0.72% | +366,493 | New |
| Two Sigma Investments, LP | 343,994 | $23.9M | 0.02% | −295,847−46.2% | Reduced |
| Rhumbline Advisers | 333,507 | $23.2M | 0.02% | +25,100+8.1% | Added |
| S Squared Technology, LLC | 332,451 | $23.1M | 7.18% | −125,000−27.3% | Reduced |
| Segall Bryant & Hamill, LLC | 332,440 | $23.1M | 0.27% | −712,544−68.2% | Reduced |
| Frontier Capital Management Co LLC | 330,904 | $23.0M | 0.21% | +66,873+25.3% | Added |
| CIBC Bancorp USA Inc. | 327,536 | $22.8M | 0.03% | +327,536 | New |
| Gotham Asset Management, LLC | 325,436 | $22.7M | 0.05% | +13,190+4.2% | Added |
| UBS Asset Management Americas Inc | 323,297 | $22.5M | 0.00% | −21,760−6.3% | Reduced |
| HRT Financial LP | 316,439 | $22.0M | 0.04% | +54,667+20.9% | Added |
| Russell Investments Group, Ltd. | 272,403 | $19.0M | 0.02% | +176,320+183.5% | Added |
| Balyasny Asset Management LLC | 267,283 | $18.6M | 0.03% | +21,373+8.7% | Added |
| Swiss National Bank | 250,900 | $17.5M | 0.01% | −5,500−2.1% | Reduced |
| Federated Hermes, Inc. | 237,367 | $16.5M | 0.02% | +227,499+2,305.4% | Added |
| Pier Capital, LLC | 227,777 | $15.9M | 2.10% | +1,211+0.5% | Added |
| Granite Investment Partners, LLC | 215,679 | $15.0M | 0.77% | +215,679 | New |
| Lightrock Netherlands B.V. | 206,490 | $14.4M | 2.84% | −301,500−59.4% | Reduced |
| Peregrine Capital Management LLC | 200,422 | $14.0M | 0.45% | −59,342−22.8% | Reduced |
| Granahan Investment Management Inc | 185,461 | $12.9M | 0.46% | −29,540−13.7% | Reduced |
| Talos Asset Management LP | 182,600 | $12.7M | 1.87% | −310,573−63.0% | Reduced |
| Susquehanna International Group, LLP | 178,568 | $12.4M | 0.01% | +63,185+54.8% | Added |
| SEI Investments Co | 169,643 | $11.8M | 0.01% | −49,333−22.5% | Reduced |
| Retirement Systems of Alabama | 169,402 | $11.8M | 0.04% | −23,793−12.3% | Reduced |
| Quantinno Capital Management LP | 166,217 | $11.6M | 0.01% | +32,315+24.1% | Added |
| Legal & General Group Plc | 164,734 | $11.5M | 0.00% | +630.0% | Added |
| Citigroup Inc | 148,210 | $10.3M | 0.00% | +42,056+39.6% | Added |
| California State Teachers Retirement System | 144,618 | $10.1M | 0.01% | −5,208−3.5% | Reduced |
| Nippon Life Global Investors Americas, Inc. | 143,870 | $10.0M | 0.40% | +143,870 | New |
| Trillium Asset Management, LLC | 143,348 | $9.98M | 0.31% | +15,791+12.4% | Added |
| Castleark Management LLC | 141,900 | $9.88M | 0.27% | −5,520−3.7% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 133,903 | $9.32M | 0.01% | +6,510+5.1% | Added |
| Vanguard Asset Management, Ltd | 119,149 | $8.30M | 0.01% | +3,080+2.7% | Added |
| Royal Bank of Canada | 108,497 | $7.55M | 0.00% | +78,160+257.6% | Added |
| Lisanti Capital Growth, LLC | 107,865 | $7.51M | 1.65% | +107,865 | New |
| State Board of Administration of Florida Retirement System | 96,177 | $6.70M | 0.01% | +3,380+3.6% | Added |
| Man Group plc | 95,101 | $6.62M | 0.01% | −211,248−69.0% | Reduced |
| Wells Fargo & Company | 94,917 | $6.61M | 0.00% | +21,456+29.2% | Added |
| Edgestream Partners, L.P. | 92,188 | $6.42M | 0.19% | +92,188 | New |
| Manufacturers Life Insurance Company, The | 91,616 | $6.38M | 0.00% | +10,544+13.0% | Added |
| New York State Common Retirement Fund | 89,119 | $6.20M | 0.01% | +42,781+92.3% | Added |
| Deutsche Bank AG | 88,759 | $6.18M | 0.00% | +64,639+268.0% | Added |
| State of Wisconsin Investment Board | 88,089 | $6.13M | 0.01% | −6,864−7.2% | Reduced |
| Envestnet Asset Management Inc | 85,884 | $5.98M | 0.00% | +40,944+91.1% | Added |
| Candriam Luxembourg S.C.A. | 84,708 | $5.89M | 0.03% | −1,365−1.6% | Reduced |
| ArrowMark Colorado Holdings LLC | 83,361 | $5.80M | 0.24% | −37,423−31.0% | Reduced |
| Natixis Advisors, L.P. | 76,653 | $5.34M | 0.01% | +29,273+61.8% | Added |
| LPL Financial LLC | 71,589 | $4.98M | 0.00% | +35,511+98.4% | Added |
| Van Eck Associates Corp | 70,504 | $4.91M | 0.00% | +28,738+68.8% | Added |
| Algert Global LLC | 65,240 | $4.54M | 0.05% | +58,500+868.0% | Added |
| MetLife Investment Management | 64,638 | $4.50M | 0.02% | +3,587+5.9% | Added |
| Holocene Advisors, LP | 63,010 | $4.39M | 0.01% | +63,010 | New |
| State of Tennessee, Treasury Department | 62,389 | $4.34M | 0.01% | −16,848−21.3% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 61,148 | $4.26M | 0.01% | +12,544+25.8% | Added |
| Handelsbanken Fonder AB | 59,900 | $4.17M | 0.01% | +19,900+49.8% | Added |
| EAM Investors, LLC | 59,485 | $4.14M | 0.37% | +59,485 | New |
| Guggenheim Capital LLC | 59,349 | $4.13M | 0.03% | +5,659+10.5% | Added |
| Neuberger Berman Group LLC | 59,204 | $4.12M | 0.00% | +1,227+2.1% | Added |
| Amalgamated Bank | 58,401 | $4.07M | 0.03% | +2,605+4.7% | Added |
| Jupiter Topco LLC | 57,329 | $3.99M | 0.00% | +57,329 | New |