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 | $3.60B |
| 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, 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 |
|---|---|---|---|---|---|
| Lisanti Capital Growth, LLC | 107,865 | $7.51M | 1.65% | +107,865 | New |
| Royal Bank of Canada | 108,497 | $7.55M | 0.00% | +78,160+257.6% | Added |
| Vanguard Asset Management, Ltd | 119,149 | $8.30M | 0.01% | +3,080+2.7% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 133,903 | $9.32M | 0.01% | +6,510+5.1% | Added |
| Castleark Management LLC | 141,900 | $9.88M | 0.27% | −5,520−3.7% | Reduced |
| Trillium Asset Management, LLC | 143,348 | $9.98M | 0.31% | +15,791+12.4% | Added |
| Nippon Life Global Investors Americas, Inc. | 143,870 | $10.0M | 0.40% | +143,870 | New |
| California State Teachers Retirement System | 144,618 | $10.1M | 0.01% | −5,208−3.5% | Reduced |
| Citigroup Inc | 148,210 | $10.3M | 0.00% | +42,056+39.6% | Added |
| Legal & General Group Plc | 164,734 | $11.5M | 0.00% | +630.0% | Added |
| Quantinno Capital Management LP | 166,217 | $11.6M | 0.01% | +32,315+24.1% | Added |
| Retirement Systems of Alabama | 169,402 | $11.8M | 0.04% | −23,793−12.3% | Reduced |
| SEI Investments Co | 169,643 | $11.8M | 0.01% | −49,333−22.5% | Reduced |
| Susquehanna International Group, LLP | 178,568 | $12.4M | 0.01% | +63,185+54.8% | Added |
| Talos Asset Management LP | 182,600 | $12.7M | 1.87% | −310,573−63.0% | Reduced |
| Granahan Investment Management Inc | 185,461 | $12.9M | 0.46% | −29,540−13.7% | Reduced |
| Peregrine Capital Management LLC | 200,422 | $14.0M | 0.45% | −59,342−22.8% | Reduced |
| Lightrock Netherlands B.V. | 206,490 | $14.4M | 2.94% | −301,500−59.4% | Reduced |
| Granite Investment Partners, LLC | 215,679 | $15.0M | 0.77% | +215,679 | New |
| Pier Capital, LLC | 227,777 | $15.9M | 2.10% | +1,211+0.5% | Added |
| Federated Hermes, Inc. | 237,367 | $16.5M | 0.02% | +227,499+2,305.4% | Added |
| Swiss National Bank | 250,900 | $17.5M | 0.01% | −5,500−2.1% | Reduced |
| Balyasny Asset Management LLC | 267,283 | $18.6M | 0.03% | +21,373+8.7% | Added |
| Russell Investments Group, Ltd. | 272,403 | $19.0M | 0.02% | +176,320+183.5% | Added |
| HRT Financial LP | 316,439 | $22.0M | 0.04% | +54,667+20.9% | Added |
| UBS Asset Management Americas Inc | 323,297 | $22.5M | 0.00% | −21,760−6.3% | Reduced |
| Gotham Asset Management, LLC | 325,436 | $22.7M | 0.05% | +13,190+4.2% | Added |
| CIBC Bancorp USA Inc. | 327,536 | $22.8M | 0.03% | +327,536 | New |
| Frontier Capital Management Co LLC | 330,904 | $23.0M | 0.21% | +66,873+25.3% | Added |
| Segall Bryant & Hamill, LLC | 332,440 | $23.1M | 0.27% | −712,544−68.2% | Reduced |
| S Squared Technology, LLC | 332,451 | $23.1M | 7.18% | −125,000−27.3% | Reduced |
| Rhumbline Advisers | 333,507 | $23.2M | 0.02% | +25,100+8.1% | Added |
| Two Sigma Investments, LP | 343,994 | $23.9M | 0.02% | −295,847−46.2% | Reduced |
| Braun Stacey Associates Inc | 366,493 | $25.5M | 0.72% | +366,493 | New |
| Aperture Investors, LLC | 443,427 | $30.9M | 3.28% | −266,247−37.5% | Reduced |
| AQR Capital Management LLC | 493,753 | $33.4M | 0.01% | +148,627+43.1% | Added |
| T. Rowe Price Investment Management, Inc. | 517,648 | $36.0M | 0.02% | −43,696−7.8% | Reduced |
| Lord, Abbett & Co. LLC | 525,863 | $36.6M | 0.10% | −4,592−0.9% | Reduced |
| Silvercrest Asset Management Group LLC | 537,082 | $37.4M | 0.25% | −170,809−24.1% | Reduced |
| Alliancebernstein L.P. | 1,201,203 | $37.9M | 0.01% | −522,167−30.3% | Reduced |
| Allspring Global Investments Holdings, LLC | 620,540 | $39.2M | 0.06% | +312,916+101.7% | Added |
| Ameriprise Financial Inc | 608,793 | $43.0M | 0.01% | +249,511+69.4% | Added |
| GW&K Investment Management, LLC | 666,812 | $46.4M | 0.36% | +7,236+1.1% | Added |
| First Trust Advisors LP | 684,022 | $47.6M | 0.03% | +269,125+64.9% | Added |
| Kennedy Capital Management, Inc. | 689,668 | $48.0M | 0.85% | −220,371−24.2% | Reduced |
| Bank of New York Mellon Corp | 716,952 | $49.9M | 0.01% | −26,340−3.5% | Reduced |
| Nuveen, LLC | 722,645 | $50.3M | 0.01% | −224,857−23.7% | Reduced |
| UBS Group AG | 780,945 | $54.4M | 0.01% | +345,564+79.4% | Added |
| Vanguard Fiduciary Trust Co | 800,030 | $55.7M | 0.01% | +34,144+4.5% | Added |
| Wellington Management Group LLP | 814,937 | $56.7M | 0.01% | +141,841+21.1% | Added |
| Bank of America Corp | 921,728 | $64.2M | 0.00% | +66,275+7.7% | Added |
| Raymond James Financial Inc | 928,060 | $64.6M | 0.02% | −67,693−6.8% | Reduced |
| Voya Investment Management LLC | 966,871 | $67.3M | 0.06% | −492,400−33.7% | Reduced |
| Adage Capital Partners GP, L.L.C. | 1,121,950 | $78.1M | 0.11% | −342,787−23.4% | Reduced |
| Nomura Asset Management International Inc. | 1,159,503 | $80.7M | 0.12% | −921,138−44.3% | Reduced |
| Northern Trust Corp | 1,167,135 | $81.3M | 0.01% | +121,594+11.6% | Added |
| Norges Bank | 1,294,958 | $90.2M | 0.01% | +1,294,958 | New |
| Charles Schwab Investment Management Inc | 1,360,525 | $94.7M | 0.01% | −30,081−2.2% | Reduced |
| Massachusetts Financial Services Co | 1,443,495 | $100.5M | 0.03% | +1,374,198+1,983.1% | Added |
| Principal Financial Group Inc | 1,489,791 | $103.7M | 0.05% | −300,675−16.8% | Reduced |
| Goldman Sachs Group Inc | 1,575,057 | $109.7M | 0.01% | +137,842+9.6% | Added |
| Loomis Sayles & Co L P | 1,619,931 | $112.8M | 0.14% | −54,177−3.2% | Reduced |
| Morgan Stanley | 1,809,335 | $126.0M | 0.01% | −465,950−20.5% | Reduced |
| Dimensional Fund Advisors LP | 2,123,963 | $147.8M | 0.03% | −46,524−2.1% | Reduced |
| Geode Capital Management, LLC | 2,644,929 | $184.2M | 0.01% | +188,109+7.7% | Added |
| Clearbridge Investments, LLC | 2,946,239 | $205.1M | 0.17% | +82,529+2.9% | Added |
| Price T Rowe Associates Inc | 3,710,288 | $258.3M | 0.03% | +3,596,489+3,160.4% | Added |
| Vanguard Capital Management LLC | 5,508,806 | $383.5M | 0.01% | +44,088+0.8% | Added |
| State Street Corp | 5,676,421 | $395.2M | 0.01% | +448,317+8.6% | Added |
| Vanguard Portfolio Management LLC | 7,668,472 | $533.9M | 0.02% | −251,570−3.2% | Reduced |
| Capital Research Global Investors | 12,006,396 | $835.9M | 0.12% | −429,162−3.5% | Reduced |
| JPMorgan Chase & Co | 12,723,790 | $844.9M | 0.05% | +4,071,722+47.1% | Added |
| Invesco Ltd. | 13,678,393 | $952.3M | 0.08% | +4,926,912+56.3% | Added |
| BlackRock, Inc. | 13,889,324 | $967.0M | 0.01% | +1,394,456+11.2% | Added |
| FMR LLC | 25,581,021 | $1.78B | 0.08% | −1,840,185−6.7% | Reduced |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −399,444−100.0% | Sold out |
| G2 Investment Partners Management LLC | 0 | $0 | 0.00% | −208,569−100.0% | Sold out |
| Kettle Hill Capital Management, LLC | 0 | $0 | 0.00% | −181,531−100.0% | Sold out |
| Roubaix Capital, LLC | 0 | $0 | 0.00% | −169,993−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −133,800−100.0% | Sold out |
| Renaissance Technologies LLC | 0 | $0 | 0.00% | −123,900−100.0% | Sold out |
| Brevan Howard Capital Management LP | 0 | $0 | 0.00% | −95,099−100.0% | Sold out |
| Summit Partners Public Asset Management, LLC | 0 | $0 | 0.00% | −54,000−100.0% | Sold out |
| Boothbay Fund Management, LLC | 0 | $0 | 0.00% | −51,418−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −45,132−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −37,128−100.0% | Sold out |
| Lecap Asset Management Ltd | 0 | $0 | 0.00% | −28,521−100.0% | Sold out |
| Altfest L J & Co Inc | 0 | $0 | 0.00% | −28,167−100.0% | Sold out |
| Millennium Management LLC | 0 | $0 | 0.00% | −28,127−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −27,987−100.0% | Sold out |
| Moody National Bank Trust Division | 0 | $0 | 0.00% | −22,355−100.0% | Sold out |
| CenterBook Partners LP | 0 | $0 | 0.00% | −21,847−100.0% | Sold out |
| Mirabella Financial Services LLP | 0 | $0 | 0.00% | −17,082−100.0% | Sold out |
| Bridgewater Associates, LP | 0 | $0 | 0.00% | −16,645−100.0% | Sold out |
| PEAK6 LLC | 0 | $0 | 0.00% | −15,503−100.0% | Sold out |
| Catalyst Funds Management Pty Ltd | 0 | $0 | 0.00% | −13,500−100.0% | Sold out |
| Alpine Global Management, LLC | 0 | $0 | 0.00% | −12,630−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −11,703−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −11,699−100.0% | Sold out |
| MML Investors Services, LLC | 0 | $0 | 0.00% | −10,975−100.0% | Sold out |