Allegro Microsystems, Inc.: which funds bought and sold
Institutions that bought and sold Allegro Microsystems shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.
Between March 31, 2026 and June 30, 2026, 209 institutions that filed 13F reports for both quarters added to or opened positions in Allegro Microsystems, and 150 cut or closed them. Together they added a net 8.6M shares, +6.2% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 866K shares (−1.6%); index fund managers were net buyers of 2.0M shares (+5.3%). 93 opened a new position and 43 sold out entirely.
Bought, Q2 2026 209 institutions, 93 of them new holders Sold, Q2 2026 150 institutions, 43 of them sold out
Net change, all compared +8.6M shares (+6.2%)
Net change, active managers −866K shares (−1.6%), 19 bought, 31 sold
Buyers versus sellers
209 bought 49 150 sold
Active managers and hedge funds 19 bought · 31 sold · −866K
Index fund managers 8 bought · 3 sold · +2.0M
Other institutions 182 bought · 116 sold · +7.5M
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Invesco Ltd. | +4.9M +56.3% | 13.7M | $952M |
| Jpmorgan Chase & Co | +4.1M +47.1% | 12.7M | $845M |
| Price T Rowe Associates Inc Active manager | +3.6M +3160.4% | 3.7M | $258M |
| Blackrock, Inc. Index funds | +1.4M +11.2% | 13.9M | $967M |
| Massachusetts Financial Services Co Active manager | +1.4M +1983.1% | 1.4M | $100M |
| State Street Corp Index funds | +448K +8.6% | 5.7M | $395M |
| Braun Stacey Associates Inc | +366K New position | 366K | $25.5M |
| UBS Group AG | +346K +79.4% | 781K | $54.4M |
| CIBC Bancorp Usa Inc. | +328K New position | 328K | $22.8M |
| Allspring Global Investments Holdings, LLC | +313K +101.7% | 621K | $39.2M |
| First Trust Advisors LP | +269K +64.9% | 684K | $47.6M |
| Ameriprise Financial Inc | +250K +69.4% | 609K | $43M |
| Federated Hermes, Inc. Active manager | +227K +2305.4% | 237K | $16.5M |
| Granite Investment Partners, LLC | +216K New position | 216K | $15M |
| Geode Capital Management, LLC Index funds | +188K +7.7% | 2.6M | $184M |
| Russell Investments Group, Ltd. | +176K +183.5% | 272K | $19M |
| AQR Capital Management LLC Hedge fund | +149K +43.1% | 494K | $33.4M |
| Nippon Life Global Investors Americas, Inc. | +144K New position | 144K | $10M |
| Wellington Management Group LLP Active manager | +142K +21.1% | 815K | $56.7M |
| Goldman Sachs Group Inc | +138K +9.6% | 1.6M | $110M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Price T Rowe Associates Inc Active manager | +3.6M +3160.4% | 3.7M | $258M |
| Massachusetts Financial Services Co Active manager | +1.4M +1983.1% | 1.4M | $100M |
| Federated Hermes, Inc. Active manager | +227K +2305.4% | 237K | $16.5M |
| AQR Capital Management LLC Hedge fund | +149K +43.1% | 494K | $33.4M |
| Wellington Management Group LLP Active manager | +142K +21.1% | 815K | $56.7M |
| Edgestream Partners, L.P. Hedge fund | +92K New position | 92K | $6.4M |
| Clearbridge Investments, LLC Active manager | +83K +2.9% | 2.9M | $205M |
| Frontier Capital Management Co LLC Active manager | +67K +25.3% | 331K | $23M |
| Holocene Advisors, LP Hedge fund | +63K New position | 63K | $4.4M |
| Algert Global LLC Hedge fund | +59K +868.0% | 65K | $4.5M |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| FMR LLC Active manager | −1.8M −6.7% | 25.6M | $1.8B |
| Nomura Asset Management International Inc. | −921K −44.3% | 1.2M | $80.7M |
| Marshall Wace, LLP Hedge fund | −726K −98.2% | 13K | $926,572 |
| Segall Bryant & Hamill, LLC Active manager | −713K −68.2% | 332K | $23.1M |
| Alliancebernstein L.P. Active manager | −522K −30.3% | 1.2M | $37.9M |
| Voya Investment Management LLC | −492K −33.7% | 967K | $67.3M |
| Morgan Stanley | −466K −20.5% | 1.8M | $126M |
| Capital Research Global Investors Active manager | −429K −3.5% | 12.0M | $836M |
| Citadel Advisors LLC Hedge fund | −399K Sold out | 0 | — |
| Adage Capital Partners Gp, L.L.C. Hedge fund | −343K −23.4% | 1.1M | $78.1M |
| Talos Eurisko Asset Management LP | −311K −63.0% | 183K | $12.7M |
| Lightrock Netherlands B.V. | −302K −59.4% | 206K | $14.4M |
| Principal Financial Group Inc | −301K −16.8% | 1.5M | $104M |
| Two Sigma Investments, LP Hedge fund | −296K −46.2% | 344K | $23.9M |
| Jacobs Levy Equity Management, Inc Active manager | −281K −91.3% | 27K | $1.9M |
| Sirios Capital Management L P | −275K −92.1% | 23K | $1.6M |
| Aperture Investors, LLC | −266K −37.5% | 443K | $30.9M |
| Vanguard Portfolio Management LLC Index funds | −252K −3.2% | 7.7M | $534M |
| Nuveen, LLC | −225K −23.7% | 723K | $50.3M |
| Kennedy Capital Management LLC Active manager | −220K −24.2% | 690K | $48M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| FMR LLC Active manager | −1.8M −6.7% | 25.6M | $1.8B |
| Marshall Wace, LLP Hedge fund | −726K −98.2% | 13K | $926,572 |
| Segall Bryant & Hamill, LLC Active manager | −713K −68.2% | 332K | $23.1M |
| Alliancebernstein L.P. Active manager | −522K −30.3% | 1.2M | $37.9M |
| Capital Research Global Investors Active manager | −429K −3.5% | 12.0M | $836M |
| Citadel Advisors LLC Hedge fund | −399K Sold out | 0 | — |
| Adage Capital Partners Gp, L.L.C. Hedge fund | −343K −23.4% | 1.1M | $78.1M |
| Two Sigma Investments, LP Hedge fund | −296K −46.2% | 344K | $23.9M |
| Jacobs Levy Equity Management, Inc Active manager | −281K −91.3% | 27K | $1.9M |
| Kennedy Capital Management LLC Active manager | −220K −24.2% | 690K | $48M |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Braun Stacey Associates Inc | 366K | $25.5M |
| CIBC Bancorp Usa Inc. | 328K | $22.8M |
| Granite Investment Partners, LLC | 216K | $15M |
| Nippon Life Global Investors Americas, Inc. | 144K | $10M |
| Lisanti Capital Growth, LLC | 108K | $7.5M |
| Edgestream Partners, L.P.Hedge fund | 92K | $6.4M |
| Holocene Advisors, LPHedge fund | 63K | $4.4M |
| Informed Momentum Co LLC | 59K | $4.1M |
| Munro PartnersActive manager | 50K | $3.5M |
| Amundi | 49K | $3.4M |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Citadel Advisors LLCHedge fund | 399K | $12.6M |
| G2 Investment Partners Management LLC | 209K | $6.6M |
| Kettle Hill Capital Management, LLC | 182K | $5.7M |
| Roubaix Capital, LLC | 170K | $5.4M |
| Trexquant Investment LPHedge fund | 134K | $4.2M |
| Renaissance Technologies LLCHedge fund | 124K | $3.9M |
| Brevan Howard Capital Management LPHedge fund | 95K | $3M |
| Summit Partners Public Asset Management, LLC | 54K | $1.7M |
| Boothbay Fund Management, LLCHedge fund | 51K | $1.6M |
| Y-Intercept (Hong Kong) Ltd | 45K | $1.4M |
Who holds the shares
- Institutions reporting
- 372
- Ten largest holders
- 69.8% of 13F-reported shares
- Index fund managers
- 26.4% of 13F-reported shares
- Active managers and hedge funds
- 36.9% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 19 | 31 | 5 | 10 | −866K | −1.6% |
| Index fund managers | 8 | 3 | 0 | 0 | +2.0M | +5.3% |
| Other institutions | 182 | 116 | 88 | 33 | +7.5M | +16.4% |
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