Mayville Engineering Company, Inc.: which funds bought and sold
Institutions that bought and sold Mayville Engineering 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, 97 institutions that filed 13F reports for both quarters added to or opened positions in Mayville Engineering, and 58 cut or closed them. Together they added a net 6.6M shares, +46.1% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 4.0M shares (+130.7%); index fund managers were net buyers of 547K shares (+22.6%). 52 opened a new position and 20 sold out entirely.
Bought, Q2 2026 97 institutions, 52 of them new holders Sold, Q2 2026 58 institutions, 20 of them sold out
Net change, all compared +6.6M shares (+46.1%)
Net change, active managers +4.0M shares (+130.7%), 24 bought, 12 sold
Buyers versus sellers
97 bought 18 58 sold
Active managers and hedge funds 24 bought · 12 sold · +4.0M
Index fund managers 9 bought · 0 sold · +547K
Other institutions 64 bought · 46 sold · +2.0M
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| FMR LLC Active manager | +1.3M +29943.9% | 1.3M | $48M |
| Driehaus Capital Management LLC Active manager | +846K New position | 846K | $31.7M |
| Summit Partners Public Asset Management, LLC | +800K New position | 800K | $30M |
| Portolan Capital Management, LLC | +478K +58.2% | 1.3M | $48.7M |
| Wellington Management Group LLP Active manager | +478K New position | 478K | $17.9M |
| Boston Partners Active manager | +464K +199.4% | 696K | $25.8M |
| Jane Street Group, LLC | +356K New position | 356K | $13.3M |
| Jpmorgan Chase & Co | +342K +6235.0% | 347K | $13M |
| First Eagle Investment Management, LLC Active manager | +335K +82.9% | 739K | $27.7M |
| Ophir Asset Management Pty Ltd | +327K New position | 327K | $12.2M |
| Blackrock, Inc. Index funds | +302K +34.2% | 1.2M | $44.3M |
| Nuveen, LLC | +234K +494.5% | 282K | $10.6M |
| Kennedy Capital Management LLC Active manager | +230K +215.0% | 336K | $12.6M |
| Awm Investment Company, Inc. | +180K New position | 180K | $6.7M |
| Osterweis Capital Management Inc | +175K New position | 175K | $6.5M |
| Tudor Investment Corp Et Al Hedge fund | +170K New position | 170K | $6.4M |
| Two Sigma Investments, LP Hedge fund | +164K +473.1% | 199K | $7.5M |
| Lord, Abbett & Co. LLC | +152K New position | 152K | $5.7M |
| Vanguard Capital Management LLC Index funds | +149K +25.0% | 744K | $27.9M |
| Citadel Advisors LLC Hedge fund | +142K +249.9% | 199K | $7.4M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| FMR LLC Active manager | +1.3M +29943.9% | 1.3M | $48M |
| Driehaus Capital Management LLC Active manager | +846K New position | 846K | $31.7M |
| Wellington Management Group LLP Active manager | +478K New position | 478K | $17.9M |
| Boston Partners Active manager | +464K +199.4% | 696K | $25.8M |
| First Eagle Investment Management, LLC Active manager | +335K +82.9% | 739K | $27.7M |
| Kennedy Capital Management LLC Active manager | +230K +215.0% | 336K | $12.6M |
| Tudor Investment Corp Et Al Hedge fund | +170K New position | 170K | $6.4M |
| Two Sigma Investments, LP Hedge fund | +164K +473.1% | 199K | $7.5M |
| Citadel Advisors LLC Hedge fund | +142K +249.9% | 199K | $7.4M |
| Squarepoint Ops LLC Hedge fund | +128K +115.9% | 239K | $8.9M |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Allspring Global Investments Holdings, LLC | −927K −46.4% | 1.1M | $37.8M |
| Ameriprise Financial Inc | −352K Sold out | 0 | — |
| Roubaix Capital, LLC | −211K Sold out | 0 | — |
| Arrowstreet Capital, Limited Partnership Hedge fund | −185K Sold out | 0 | — |
| Evr Research LP | −178K −28.7% | 442K | $16.6M |
| American Century Companies Inc Active manager | −173K −78.3% | 48K | $1.8M |
| Dimensional Fund Advisors LP | −144K −15.5% | 782K | $29.3M |
| Millennium Management LLC Hedge fund | −127K −33.4% | 254K | $9.5M |
| Centerbook Partners LP Hedge fund | −89K −74.2% | 31K | $1.2M |
| Panoramic Capital, LLC | −70K −50.0% | 70K | $2.6M |
| Granahan Investment Management, LLC | −63K −16.4% | 324K | $12.1M |
| Osaic Holdings, Inc. | −59K −60.0% | 40K | $1.5M |
| Integrated Quantitative Investments LLC | −51K Sold out | 0 | — |
| Hightower Advisors, LLC | −45K Sold out | 0 | — |
| Panagora Asset Management Inc Active manager | −37K Sold out | 0 | — |
| Legato Capital Management LLC | −36K Sold out | 0 | — |
| Renaissance Technologies LLC Hedge fund | −35K −55.5% | 28K | $1M |
| UBS Group AG | −34K −29.1% | 83K | $3.1M |
| Ancora Advisors LLC | −32K Sold out | 0 | — |
| Numerai Gp LLC | −27K −68.8% | 12K | $464,879 |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Arrowstreet Capital, Limited Partnership Hedge fund | −185K Sold out | 0 | — |
| American Century Companies Inc Active manager | −173K −78.3% | 48K | $1.8M |
| Millennium Management LLC Hedge fund | −127K −33.4% | 254K | $9.5M |
| Centerbook Partners LP Hedge fund | −89K −74.2% | 31K | $1.2M |
| Panagora Asset Management Inc Active manager | −37K Sold out | 0 | — |
| Renaissance Technologies LLC Hedge fund | −35K −55.5% | 28K | $1M |
| Bridgeway Capital Management, LLC Active manager | −22K −9.8% | 201K | $7.5M |
| Alliancebernstein L.P. Active manager | −13K Sold out | 0 | — |
| Brevan Howard Capital Management LP Hedge fund | −6,442 −53.6% | 5,581 | $209,064 |
| O'Shaughnessy Asset Management, LLC Active manager | −4,585 −17.4% | 22K | $816,066 |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Driehaus Capital Management LLCActive manager | 846K | $31.7M |
| Summit Partners Public Asset Management, LLC | 800K | $30M |
| Wellington Management Group LLPActive manager | 478K | $17.9M |
| Jane Street Group, LLC | 356K | $13.3M |
| Ophir Asset Management Pty Ltd | 327K | $12.2M |
| Awm Investment Company, Inc. | 180K | $6.7M |
| Osterweis Capital Management Inc | 175K | $6.5M |
| Tudor Investment Corp Et AlHedge fund | 170K | $6.4M |
| Lord, Abbett & Co. LLC | 152K | $5.7M |
| Pillsbury Lake Capital LLC | 137K | $5.1M |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Ameriprise Financial Inc | 352K | $6.3M |
| Roubaix Capital, LLC | 211K | $3.8M |
| Arrowstreet Capital, Limited PartnershipHedge fund | 185K | $3.3M |
| Integrated Quantitative Investments LLC | 51K | $909,329 |
| Hightower Advisors, LLC | 45K | $800,337 |
| Panagora Asset Management IncActive manager | 37K | $659,932 |
| Legato Capital Management LLC | 36K | $640,779 |
| Ancora Advisors LLC | 32K | $576,787 |
| Summittx Capital, L.P. | 19K | $335,593 |
| Gradient Investments LLC | 17K | $307,017 |
Who holds the shares
- Institutions reporting
- 154
- Ten largest holders
- 44.1% of 13F-reported shares
- Index fund managers
- 13.8% of 13F-reported shares
- Active managers and hedge funds
- 33.1% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 24 | 12 | 16 | 3 | +4.0M | +130.7% |
| Index fund managers | 9 | 0 | 0 | 0 | +547K | +22.6% |
| Other institutions | 64 | 46 | 36 | 17 | +2.0M | +23.0% |
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