Mercury Systems Inc: which funds bought and sold
Institutions that bought and sold Mercury Systems 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, 208 institutions that filed 13F reports for both quarters added to or opened positions in Mercury Systems, and 175 cut or closed them. Together they added a net 461K shares, +0.7% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 808K shares (+4.2%); index fund managers were net buyers of 131K shares (+0.6%). 80 opened a new position and 43 sold out entirely.
Bought, Q2 2026 208 institutions, 80 of them new holders Sold, Q2 2026 175 institutions, 43 of them sold out
Net change, all compared +461K shares (+0.7%)
Net change, active managers +808K shares (+4.2%), 29 bought, 30 sold
Buyers versus sellers
208 bought 45 175 sold
Active managers and hedge funds 29 bought · 30 sold · +808K
Index fund managers 6 bought · 6 sold · +131K
Other institutions 173 bought · 139 sold · −478K
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| FMR LLC Active manager | +938K +103.8% | 1.8M | $225M |
| American Capital Management Inc | +486K New position | 486K | $59.5M |
| Blackrock, Inc. Index funds | +451K +5.1% | 9.4M | $1.1B |
| Franklin Resources Inc Active manager | +393K +86.7% | 847K | $104M |
| Goldman Sachs Group Inc | +375K +31.2% | 1.6M | $193M |
| Price T Rowe Associates Inc Active manager | +257K +25.0% | 1.3M | $157M |
| Invesco Ltd. | +228K +9.3% | 2.7M | $327M |
| Driehaus Capital Management LLC Active manager | +193K +65.6% | 488K | $59.7M |
| Swedbank AB | +189K +342.1% | 244K | $29.9M |
| Morgan Stanley | +140K +20.9% | 812K | $99.3M |
| First Trust Advisors LP | +138K +11.9% | 1.3M | $159M |
| Vanguard Portfolio Management LLC Index funds | +121K +4.1% | 3.0M | $371M |
| Jane Street Group, LLC | +115K New position | 115K | $14.1M |
| Df Dent & Co Inc | +114K New position | 114K | $13.9M |
| Summit Partners Public Asset Management, LLC | +98K New position | 98K | $12M |
| Segall Bryant & Hamill, LLC Active manager | +95K +10.1% | 1.0M | $126M |
| American Century Companies Inc Active manager | +82K +14.1% | 665K | $81.3M |
| Select Equity Group, L.P. Active manager | +82K +98.0% | 165K | $20.2M |
| Thrivent Financial For Lutherans | +67K +48.0% | 207K | $25.3M |
| William Blair Investment Management, LLC Active manager | +52K +16.0% | 380K | $46.5M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| FMR LLC Active manager | +938K +103.8% | 1.8M | $225M |
| Franklin Resources Inc Active manager | +393K +86.7% | 847K | $104M |
| Price T Rowe Associates Inc Active manager | +257K +25.0% | 1.3M | $157M |
| Driehaus Capital Management LLC Active manager | +193K +65.6% | 488K | $59.7M |
| Segall Bryant & Hamill, LLC Active manager | +95K +10.1% | 1.0M | $126M |
| American Century Companies Inc Active manager | +82K +14.1% | 665K | $81.3M |
| Select Equity Group, L.P. Active manager | +82K +98.0% | 165K | $20.2M |
| William Blair Investment Management, LLC Active manager | +52K +16.0% | 380K | $46.5M |
| Loomis Sayles & Co L P Active manager | +35K +5.5% | 681K | $83.3M |
| Algert Global LLC Hedge fund | +32K +582.6% | 37K | $4.6M |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Ameriprise Financial Inc | −493K −49.7% | 499K | $61.1M |
| State Street Corp Index funds | −447K −11.6% | 3.4M | $418M |
| Conestoga Capital Advisors, LLC | −431K −22.5% | 1.5M | $182M |
| Jennison Associates LLC Active manager | −333K −48.4% | 355K | $43.4M |
| Citadel Advisors LLC Hedge fund | −293K Sold out | 0 | — |
| Voya Investment Management LLC | −199K −32.7% | 410K | $50.2M |
| Jana Partners Management, LP Hedge fund | −149K −3.6% | 4.0M | $484M |
| Nomura Asset Management International Inc. | −147K −50.8% | 142K | $17.4M |
| Mirae Asset Global Etfs Holdings Ltd. | −143K −16.7% | 716K | $87.6M |
| Royal Bank Of Canada | −139K −26.0% | 394K | $48.2M |
| Penn Capital Management Company, LLC Active manager | −128K Sold out | 0 | — |
| Metlife Investment Management, LLC | −122K −41.3% | 174K | $21.2M |
| Qube Research & Technologies Ltd Hedge fund | −111K Sold out | 0 | — |
| Sei Investments Co | −109K −29.5% | 262K | $32M |
| Allspring Global Investments Holdings, LLC | −99K −17.2% | 475K | $58.4M |
| Two Sigma Investments, LP Hedge fund | −90K −55.7% | 72K | $8.8M |
| Van Eck Associates Corp | −88K −10.4% | 763K | $93.3M |
| Archon Capital Management LLC | −85K −88.6% | 11K | $1.3M |
| Bank Of America Corp | −71K −24.2% | 224K | $27.3M |
| Dimensional Fund Advisors LP | −71K −5.8% | 1.2M | $141M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Jennison Associates LLC Active manager | −333K −48.4% | 355K | $43.4M |
| Citadel Advisors LLC Hedge fund | −293K Sold out | 0 | — |
| Jana Partners Management, LP Hedge fund | −149K −3.6% | 4.0M | $484M |
| Penn Capital Management Company, LLC Active manager | −128K Sold out | 0 | — |
| Qube Research & Technologies Ltd Hedge fund | −111K Sold out | 0 | — |
| Two Sigma Investments, LP Hedge fund | −90K −55.7% | 72K | $8.8M |
| Neuberger Berman Group LLC Active manager | −69K −7.6% | 842K | $102M |
| Edgestream Partners, L.P. Hedge fund | −51K −58.0% | 37K | $4.5M |
| Exoduspoint Capital Management, LP Hedge fund | −39K Sold out | 0 | — |
| BAMCO Inc Active manager | −38K −5.9% | 607K | $74.2M |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| American Capital Management Inc | 486K | $59.5M |
| Jane Street Group, LLC | 115K | $14.1M |
| Df Dent & Co Inc | 114K | $13.9M |
| Summit Partners Public Asset Management, LLC | 98K | $12M |
| Informed Momentum Co LLC | 48K | $5.9M |
| Hwg Holdings LP | 37K | $4.5M |
| Peak6 LLC | 30K | $3.7M |
| Homestead Advisers Corp | 20K | $2.4M |
| Trexquant Investment LPHedge fund | 18K | $2.2M |
| Waratah Capital Advisors Ltd. | 12K | $1.5M |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Citadel Advisors LLCHedge fund | 293K | $21.4M |
| Penn Capital Management Company, LLCActive manager | 128K | $9.3M |
| Qube Research & Technologies LtdHedge fund | 111K | $8.1M |
| Exoduspoint Capital Management, LPHedge fund | 39K | $2.9M |
| Bouvel Investment Partners, LLC | 33K | $2.4M |
| Freemont Management S.A. | 32K | $2.3M |
| Castleark Management LLC | 25K | $1.8M |
| Great Lakes Advisors, LLC | 22K | $1.6M |
| Squarepoint Ops LLCHedge fund | 22K | $1.6M |
| Cookson Peirce & Co Inc | 17K | $1.3M |
Who holds the shares
- Institutions reporting
- 389
- Ten largest holders
- 47.8% of 13F-reported shares
- Index fund managers
- 32.7% of 13F-reported shares
- Active managers and hedge funds
- 30.6% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 29 | 30 | 7 | 9 | +808K | +4.2% |
| Index fund managers | 6 | 6 | 0 | 0 | +131K | +0.6% |
| Other institutions | 173 | 139 | 73 | 34 | −478K | −1.9% |