DaveManuel.com · Institutional Ownership · Who Owns It
MAYVILLE ENGR CO INC (MEC)
Institutional ownership reported to the SEC as of Q2 2026, across 30 quarters.
160
Reporting holders
$834.2M
Reported value
84.8%
Of shares outstanding
2.3%
Calls
0.9%
Puts
+35
Holder change
Institutions report 21,629,423 shares against 25,500,331 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| Portolan Capital Management, LLC | $48.7M | 1,299,256 | 1.82% | 3q | +58.2%+$17.9M |
| FMR LLC | $48.0M | 1,280,170 | 0.00% | 18q | +29943.9%+$47.8M |
| BlackRock, Inc. | $44.3M | 1,183,443 | 0.00% | 8q | +34.2%+$11.3M |
| Allspring Global Investments Holdings, LLC | $37.8M | 1,072,916 | 0.06% | 19q | -46.4%-$32.7M |
| Driehaus Capital Management LLC | $31.7M | 846,354 | 0.18% | new | NEW |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | $30.0M | 800,000 | 0.53% | new | NEW |
| DIMENSIONAL FUND ADVISORS LP | $29.3M | 782,276 | 0.01% | 22q | -15.5%-$5.4M |
| ROYCE & ASSOCIATES LP | $28.2M | 752,083 | 0.23% | 15q | HELD |
| VANGUARD CAPITAL MANAGEMENT LLC | $27.9M | 743,621 | 0.00% | 2q | +25.0%+$5.6M |
| First Eagle Investment Management, LLC | $27.7M | 739,150 | 0.02% | 10q | +82.9%+$12.6M |
| Boston Partners | $25.8M | 696,429 | 0.02% | 4q | +199.4%+$17.2M |
| Jupiter Topco LLC | $21.5M | 575,278 | 0.01% | new | FIRST |
| BLAIR WILLIAM & CO/IL | $20.5M | 546,714 | 0.05% | 14q | -3.3%-$696.2K |
| WELLINGTON MANAGEMENT GROUP LLP | $17.9M | 477,583 | 0.00% | new | NEW |
| EVR Research LP | $16.6M | 441,908 | 8.17% | 3q | -28.7%-$6.7M |
| JANE STREET GROUP, LLC | $15.1M incl. $1.8M options CALL+PUT | 356,151 | 0.00% | new | NEW |
| GEODE CAPITAL MANAGEMENT, LLC | $14.0M | 374,578 | 0.00% | 29q | +11.5%+$1.5M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $13.5M incl. $10.3M options CALL+PUT | 85,462 | 0.00% | new | NEW |
| JPMORGAN CHASE & CO | $13.0M | 347,224 | 0.00% | 15q | +6235.0%+$12.8M |
| KENNEDY CAPITAL MANAGEMENT LLC | $12.6M | 336,377 | 0.22% | 3q | +215.0%+$8.6M |
| Ophir Asset Management Pty Ltd | $12.2M | 326,699 | 1.01% | new | NEW |
| Granahan Investment Management, LLC | $12.1M | 324,108 | 0.43% | 12q | -16.4%-$2.4M |
| SILVERCREST ASSET MANAGEMENT GROUP LLC | $11.8M | 313,943 | 0.08% | 3q | +16.4%+$1.7M |
| STATE STREET CORP | $10.9M | 291,168 | 0.00% | 29q | +1.9%+$199.2K |
| Nuveen, LLC | $10.6M | 281,914 | 0.00% | 6q | +494.5%+$8.8M |
| BANK OF AMERICA CORP /DE/ | $10.4M | 276,317 | 0.00% | 29q | +50.5%+$3.5M |
| CITADEL ADVISORS LLC | $10.0M incl. $2.5M options CALL+PUT | 198,712 | 0.00% | 3q | +249.9%+$7.1M |
| MILLENNIUM MANAGEMENT LLC | $9.5M | 253,677 | 0.00% | 3q | -33.4%-$4.8M |
| JB CAPITAL PARTNERS LP | $9.4M | 250,512 | 1.45% | 12q | HELD |
| Squarepoint Ops LLC | $8.9M | 238,766 | 0.01% | 2q | +115.9%+$4.8M |
| CONGRUENCE CAPITAL, LLC | $8.8M | 235,580 | 2.31% | 3q | HELD |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | $7.5M | 200,980 | 0.13% | 25q | -9.8%-$813.7K |
| TWO SIGMA INVESTMENTS, LP | $7.5M | 198,912 | 0.01% | 2q | +473.1%+$6.2M |
| AWM Investment Company, Inc. | $6.7M | 180,000 | 0.59% | new | NEW |
| OSTERWEIS CAPITAL MANAGEMENT INC | $6.5M | 174,600 | 0.31% | new | NEW |
| TUDOR INVESTMENT CORP ET AL | $6.4M | 169,848 | 0.01% | new | NEW |
| ANCHOR CAPITAL ADVISORS LLC | $6.1M | 161,768 | 0.09% | 13q | +98.6%+$3.0M |
| LORD, ABBETT & CO. LLC | $5.7M | 152,175 | 0.02% | new | NEW |
| PEAK6 LLC | $5.6M CALL | options only | 0.01% | new | OPTIONS |
| Wealthspire Advisors, LLC | $5.3M | 141,607 | 0.03% | 19q | HELD |
| Pillsbury Lake Capital LLC | $5.1M | 136,746 | 1.40% | new | NEW |
| Informed Momentum Co LLC | $4.8M | 129,182 | 0.43% | new | NEW |
| Russell Investments Group, Ltd. | $4.7M | 125,513 | 0.00% | 25q | -9.2%-$475.8K |
| SEI INVESTMENTS CO | $4.4M | 118,607 | 0.00% | 14q | -3.5%-$160.0K |
| Empowered Funds, LLC | $4.4M | 116,570 | 0.02% | 2q | -5.5%-$251.8K |
| NORTHERN TRUST CORP | $4.3M | 114,995 | 0.00% | 29q | +14.6%+$547.3K |
| Caption Management, LLC | $4.3M incl. $3.7M options CALL+PUT | 14,092 | 0.02% | new | NEW |
| BNP PARIBAS FINANCIAL MARKETS | $4.2M | 112,455 | 0.00% | 13q | +3919.1%+$4.1M |
| NEEDHAM INVESTMENT MANAGEMENT LLC | $4.1M | 110,000 | 0.12% | 2q | +450.0%+$3.4M |
| HUNTER ASSOCIATES INVESTMENT MANAGEMENT LLC | $4.0M | 107,528 | 0.46% | new | NEW |
| Trexquant Investment LP | $3.8M | 100,517 | 0.02% | new | NEW |
| MORGAN STANLEY | $3.8M | 100,159 | 0.00% | 29q | +320.2%+$2.9M |
| VANGUARD FIDUCIARY TRUST CO | $3.7M | 98,709 | 0.00% | 2q | +8.4%+$287.1K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $3.7M | 98,263 | 0.00% | 2q | +29.5%+$837.6K |
| Walleye Capital LLC | $3.5M | 93,444 | 0.01% | new | NEW |
| Qube Research & Technologies Ltd | $3.3M | 87,129 | 0.00% | new | NEW |
| UBS Group AG | $3.1M | 82,662 | 0.00% | 29q | -29.1%-$1.3M |
| Invesco Ltd. | $2.8M | 75,331 | 0.00% | 18q | +178.7%+$1.8M |
| FORMULA GROWTH LTD | $2.8M | 75,000 | 0.99% | 3q | -25.0%-$936.5K |
| TOCQUEVILLE ASSET MANAGEMENT L.P. | $2.7M | 71,100 | 0.04% | 27q | HELD |
| Panoramic Capital, LLC | $2.6M | 70,000 | 1.13% | 2q | -50.0%-$2.6M |
| XTX Topco Ltd | $2.5M | 65,604 | 0.03% | 3q | +58.2%+$903.8K |
| POLEN CAPITAL MANAGEMENT LLC | $2.3M | 61,827 | 0.02% | new | NEW |
| Essential Investment Partners LLC | $2.2M | 58,886 | 1.77% | 3q | +48.6%+$721.0K |
| CITIGROUP INC | $2.0M | 52,620 | 0.00% | 15q | +3114.4%+$1.9M |
| GOLDMAN SACHS GROUP INC | $1.9M | 51,990 | 0.00% | 9q | -19.9%-$483.9K |
| AMERICAN CENTURY COMPANIES INC | $1.8M | 48,211 | 0.00% | 15q | -78.3%-$6.5M |
| Balyasny Asset Management L.P. | $1.8M | 47,052 | 0.00% | new | NEW |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $1.7M | 45,861 | 0.00% | 13q | +14.4%+$215.9K |
| SummerHaven Investment Management, LLC | $1.7M | 45,325 | 0.91% | 4q | HELD |
| Bank of New York Mellon Corp | $1.7M | 44,873 | 0.00% | 13q | +15.5%+$225.6K |
| GatePass Capital, LLC | $1.5M | 40,000 | 0.57% | new | NEW |
| OSAIC HOLDINGS, INC. | $1.5M | 39,614 | 0.00% | 26q | -60.0%-$2.2M |
| SHEETS SMITH WEALTH MANAGEMENT | $1.4M | 37,897 | 0.14% | 18q | -2.8%-$40.4K |
| Diametric Capital, LP | $1.3M | 35,727 | 0.14% | new | NEW |
| Aquatic Capital Management LLC | $1.2M | 31,731 | 0.04% | 3q | +256.5%+$855.2K |
| Janney Montgomery Scott LLC | $1.2M | 31,304 | 0.00% | 7q | HELD |
| CenterBook Partners LP | $1.2M | 30,992 | 0.06% | 6q | -74.2%-$3.3M |
| BOOTHBAY FUND MANAGEMENT, LLC | $1.1M | 30,584 | 0.02% | new | NEW |
| North Star Investment Management Corp. | $1.1M | 30,000 | 0.06% | 2q | HELD |
| J. Goldman & Co LP | $1.1M CALL | options only | 0.03% | new | OPTIONS |
| KORNITZER CAPITAL MANAGEMENT INC /KS | $1.1M | 29,587 | 0.02% | new | NEW |
| HARBOR CAPITAL ADVISORS, INC. | $1.1M | 28,625 | 0.07% | 2q | +267.7%+$780.5K |
| RENAISSANCE TECHNOLOGIES LLC | $1.0M | 28,000 | 0.00% | 9q | -55.5%-$1.3M |
| Divisadero Street Capital Management, LP | $1.0M | 27,482 | 0.02% | new | NEW |
| Quadrature Capital Ltd | $991.8K | 26,477 | 0.01% | new | NEW |
| Johnson Financial Group, Inc. | $974.0K | 26,000 | 0.03% | 3q | +57.8%+$356.8K |
| PRELUDE CAPITAL MANAGEMENT, LLC | $897.9K | 23,969 | 0.07% | new | NEW |
| LPL Financial LLC | $830.6K | 22,172 | 0.00% | 29q | +1.8%+$15.0K |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC | $816.1K | 21,785 | 0.00% | 14q | -17.4%-$171.8K |
| HRT FINANCIAL LP | $807.0K | 21,568 | 0.00% | new | NEW |
| IMC-Chicago, LLC | $775.4K CALL | options only | 0.00% | new | OPTIONS |
| WELLS FARGO & COMPANY/MN | $760.4K | 20,300 | 0.00% | 29q | +61.5%+$289.6K |
| RHUMBLINE ADVISERS | $749.2K | 20,001 | 0.00% | 13q | +9.9%+$67.5K |
| GROUP ONE TRADING LLC | $749.2K CALL | options only | 0.00% | new | OPTIONS |
| ENVESTNET ASSET MANAGEMENT INC | $708.7K | 18,920 | 0.00% | 12q | -6.8%-$51.7K |
| AQR CAPITAL MANAGEMENT LLC | $682.7K | 18,224 | 0.00% | 8q | -10.6%-$80.9K |
| STATE OF WISCONSIN INVESTMENT BOARD | $680.7K | 18,171 | 0.00% | 7q | -43.7%-$527.8K |
| WESBANCO BANK INC | $674.3K | 18,000 | 0.02% | new | NEW |
| DEUTSCHE BANK AG\ | $534.9K | 14,278 | 0.00% | 3q | +39.5%+$151.4K |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-10-27 | 13G | BlackRock, Inc. | 6.3% |
What the insiders did
Open market purchases and sales reported on Form 4 in the last 180 days. Grants, option exercises and shares surrendered to cover tax are left out: they are compensation rather than a decision to buy or sell. Where a broker filled one order in tranches the lines are summed, because it was one decision.
Officers and directors
| Date | Insider | Role | Side | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-11 | Reddy Jagadeesh A | President & CEO | Sold | 15,688 | $549.8K |
| 2026-06-01 | Reddy Jagadeesh A | President & CEO | Sold | 17,942 | $538.3K |
| 2026-05-26 | Raber Ryan F | EVP - Strategy, Sales & Mktg | Sold | 20,000 | $520.0K |
| 2026-06-01 | Reddy Jagadeesh A | President & CEO | Sold | 17,294 | $518.8K |
| 2026-08-06 | Leuba Sean P | SVP, GC & Secretary | Sold | 12,855 | $327.0K |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q3 2026 | 17 | $5.6M | 375,236 | 5 | 6 | 1 | 0.0% |
| Q2 2026 | 160 | $834.2M | 21,629,423 | 57 | 45 | 36 | 3.2% |
| Q1 2026 | 125 | $258.5M | 14,401,113 | 20 | 36 | 38 | 0.0% |
| Q4 2025 | 123 | $261.2M | 13,883,530 | 27 | 34 | 41 | 0.3% |
| Q3 2025 | 105 | $183.7M | 13,286,723 | 12 | 40 | 28 | 0.0% |
| Q2 2025 | 114 | $203.0M | 12,673,011 | 15 | 43 | 30 | 0.0% |
| Q1 2025 | 117 | $168.0M | 12,437,195 | 15 | 34 | 38 | 0.1% |
| Q4 2024 | 115 | $195.8M | 12,460,649 | 16 | 45 | 25 | 0.2% |
| Q3 2024 | 116 | $246.6M | 11,690,530 | 33 | 46 | 21 | 0.1% |
| Q2 2024 | 99 | $180.2M | 10,758,553 | 22 | 36 | 20 | 0.5% |
| Q1 2024 | 83 | $139.3M | 9,654,756 | 7 | 21 | 25 | 0.7% |
| Q4 2023 | 81 | $135.2M | 9,287,475 | 6 | 28 | 24 | 1.0% |
| Q3 2023 | 86 | $98.4M | 8,911,760 | 11 | 26 | 21 | 0.6% |
| Q2 2023 | 89 | $109.5M | 8,722,452 | 30 | 28 | 22 | 0.8% |
| Q1 2023 | 77 | $117.3M | 7,829,989 | 14 | 32 | 20 | 0.4% |
| Q4 2022 | 69 | $88.5M | 7,000,067 | 23 | 14 | 21 | 0.0% |
| Q3 2022 | 56 | $41.3M | 6,343,048 | 7 | 17 | 13 | 0.0% |
| Q2 2022 | 59 | $102.5M | 13,262,557 | 13 | 19 | 13 | 0.0% |
| Q1 2022 | 63 | $127.0M | 13,556,016 | 10 | 19 | 20 | 0.0% |
| Q4 2021 | 66 | $228.5M | 15,309,899 | 6 | 18 | 25 | 0.0% |
| Q3 2021 | 76 | $450.1M | 23,939,752 | 24 | 20 | 19 | 0.0% |
| Q2 2021 | 57 | $180.8M | 8,989,900 | 7 | 30 | 16 | 0.0% |
| Q1 2021 | 58 | $110.4M | 7,678,066 | 10 | 21 | 16 | 0.0% |
| Q4 2020 | 51 | $99.0M | 7,389,572 | 7 | 19 | 15 | 0.0% |
| Q3 2020 | 48 | $64.5M | 7,015,545 | 6 | 15 | 15 | 0.0% |
| Q2 2020 | 51 | $51.7M | 6,540,675 | 8 | 20 | 11 | 0.0% |
| Q1 2020 | 49 | $36.5M | 5,957,895 | 9 | 13 | 20 | 0.0% |
| Q4 2019 | 48 | $60.3M | 6,429,630 | 8 | 23 | 11 | 0.0% |
| Q3 2019 | 49 | $77.3M | 5,862,647 | 9 | 17 | 14 | 0.0% |
| Q2 2019 | 52 | $80.4M | 5,826,038 | 52 | 0 | 0 | 0.0% |