Mayville Engineering Company, Inc. 13F holders
157 funds reported a position in Mayville Engineering Company, Inc. in their 13F for the quarter ended 30 June 2026, together 21.6 million shares worth $807.5 million. Against the quarter before, 53 opened a position, 46 added, 36 trimmed and 20 sold out; together they bought a net 6.4 million shares. The largest holders: Portolan Capital Management, LLC, FMR LLC and BlackRock, Inc.
Funds holding157+33 on Q1 2026
Shares they held21.6Mworth $807.5 million
Net bought on the quarter6.4M sharesabout $237.5 million at the funds' values
Funds buying to selling99 to 56opened or added, to cut or sold
Opened 53Added 46Held 21Trimmed 36Sold out 20
What each fund did in MEC against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in MEC in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
3,405 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 17 reported a position in Mayville Engineering Company, Inc.: 4 opened one, 6 added, 2 trimmed and 7 sold out, a net 18,411 shares bought.
| Fund | Change in shares | Shares now | Status | Filing |
|---|---|---|---|---|
| Hunter Associates Investment Management LLC | +56,517 | 164,045 | added | 13F |
| Y-Intercept (Hong Kong) Ltd | +56,125 | 56,125 | new | 13F |
| State of Wyoming | +5,504 | 5,504 | new | 13F |
| Parkside Financial Bank & Trust | -1,630 | 35 | trimmed | 13F |
| State of Alaska, Department of Revenue | +1,304 | 5,207 | added | 13F |
| Caitong International Asset Management Co., Ltd | +1,063 | 2,006 | added | 13F |
| Exchange Traded Concepts, LLC | +458 | 458 | new | 13F |
| Essential Investment Partners LLC | +350 | 59,236 | added | 13F |
| Gamma Investing LLC | +164 | 338 | added | 13F |
| Sterling Capital Management LLC | +93 | 388 | added | 13F |
| Wealth Enhancement Advisory Services, LLC | -24 | 13,922 | trimmed | 13F |
| SJS Investment Consulting Inc. | +9 | 9 | new | 13F |
| Avior Wealth Management, LLC | -7,519 | 0 | sold out | 13F |
| Delta Capital Management LLC | -9,920 | 0 | sold out | 13F |
| Farther Finance Advisors, LLC | -48 | 0 | sold out | 13F |
| Harbor Capital Advisors, Inc. | -28,625 | 0 | sold out | 13F |
| Heck Capital Advisors, LLC | -10,072 | 0 | sold out | 13F |
| Signaturefd, LLC | -13 | 0 | sold out | 13F |
| SummerHaven Investment Management, LLC | -45,325 | 0 | sold out | 13F |
The largest moves in the name among the funds that have filed, against each fund's previous 13F.
The well-known funds
Of the 44 funds followed here, 6 reported a position in Mayville Engineering Company, Inc. in a 13F for the quarter ended 30 June 2026. The largest: FMR LLC, 1.3 million shares worth $48.0 million, 0.0% of its reported book. In the quarter, 4 funds added or opened a position and 2 trimmed or sold out; together they bought a net 1.5 million shares, about $54.6 million at the funds' own value per share on 30 June 2026. A change under 0.1% of a holding counts as held.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| FMR LLC | 1,280,170 | $48.0 million | 0.0% | +1,275,909 | added | 30 June 2026 | 13F |
| Geode Capital Management | 374,578 | $14.0 million | 0.0% | +38,743 | added | 30 June 2026 | 13F |
| Millennium Management | 253,677 | $9.5 million | 0.0% | -127,295 | trimmed | 30 June 2026 | 13F |
| Two Sigma Investments | 198,912 | $7.5 million | 0.0% | +164,204 | added | 30 June 2026 | 13F |
| Citadel Advisors | 198,712 | $7.4 million | 0.0% | +141,926 | added | 30 June 2026 | 13F |
| Renaissance Technologies | 28,000 | $1.0 million | 0.0% | -34,900 | trimmed | 30 June 2026 | 13F |
Value is what the fund reported.
Read more
Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.The largest holders
| Fund | Shares | Share of all | Value | Of its book | Change in shares | Filing |
|---|---|---|---|---|---|---|
| Portolan Capital Management, LLC | 1,299,256 | 6.01% | $48.7 million | 1.82% | +478,120 | 13F |
| FMR LLC | 1,280,170 | 5.92% | $48.0 million | 0.00% | +1,275,909 | 13F |
| BlackRock, Inc. | 1,183,443 | 5.47% | $44.3 million | 0.00% | +301,589 | 13F |
| Allspring Global Investments Holdings, LLC | 1,072,916 | 4.96% | $37.8 million | 0.06% | -927,434 | 13F |
| Driehaus Capital Management LLC | 846,354 | 3.91% | $31.7 million | 0.18% | new | 13F |
| Summit Partners Public Asset Management, LLC | 800,000 | 3.70% | $30.0 million | 0.78% | new | 13F |
| Dimensional Fund Advisors LP | 782,276 | 3.62% | $29.3 million | 0.01% | -143,940 | 13F |
| Royce & Associates LP | 752,083 | 3.48% | $28.2 million | 0.23% | +1,082 | 13F |
| Vanguard Capital Management LLC | 743,621 | 3.44% | $27.9 million | 0.00% | +148,683 | 13F |
| First Eagle Investment Management, LLC | 739,150 | 3.42% | $27.7 million | 0.02% | 13F | |
| Boston Partners | 696,429 | 3.22% | $25.8 million | 0.02% | +463,792 | 13F |
| Jupiter Topco LLC | 575,278 | 2.66% | $21.5 million | 0.01% | first 13F | 13F |
| Blair William & Co. | 546,714 | 2.53% | $20.5 million | 0.05% | -18,586 | 13F |
| Wellington Management Group LLP | 477,583 | 2.21% | $17.9 million | 0.00% | new | 13F |
| EVR Research LP | 441,908 | 2.04% | $16.6 million | 8.17% | -178,092 | 13F |
| Geode Capital Management, LLC | 374,578 | 1.73% | $14.0 million | 0.00% | +38,743 | 13F |
| Jane Street Group, LLC | 356,151 | 1.65% | $13.3 million | 0.01% | new | 13F |
| JPMorgan Chase & Co. | 347,224 | 1.61% | $13.0 million | 0.00% | +341,743 | 13F |
| Kennedy Capital Management LLC | 336,377 | 1.56% | $12.6 million | 0.22% | +229,586 | 13F |
| Ophir Asset Management Pty Ltd | 326,699 | 1.51% | $12.2 million | 1.01% | new | 13F |
| Granahan Investment Management, LLC | 324,108 | 1.50% | $12.1 million | 0.43% | -63,362 | 13F |
| Silvercrest Asset Management Group LLC | 313,943 | 1.45% | $11.8 million | 0.08% | +44,262 | 13F |
| State Street Corp. | 291,168 | 1.35% | $10.9 million | 0.00% | +5,318 | 13F |
| Nuveen, LLC | 281,914 | 1.30% | $10.6 million | 0.00% | +234,496 | 13F |
| Bank of America Corp. | 276,317 | 1.28% | $10.4 million | 0.00% | +92,718 | 13F |
| Millennium Management LLC | 253,677 | 1.17% | $9.5 million | 0.01% | -127,295 | 13F |
| JB Capital Partners LP | 250,512 | 1.16% | $9.4 million | 1.45% | no change | 13F |
| Squarepoint Ops LLC | 238,766 | 1.10% | $8.9 million | 0.02% | +128,197 | 13F |
| Congruence Capital, LLC | 235,580 | 1.09% | $8.8 million | 2.31% | +1,105 | 13F |
| Bridgeway Capital Management, LLC | 200,980 | 0.93% | $7.5 million | 0.13% | -21,723 | 13F |
| Two Sigma Investments, LP | 198,912 | 0.92% | $7.5 million | 0.01% | +164,204 | 13F |
| Citadel Advisors LLC | 198,712 | 0.92% | $7.4 million | 0.00% | +141,926 | 13F |
| AWM Investment Company, Inc. | 180,000 | 0.83% | $6.7 million | 0.58% | new | 13F |
| Osterweis Capital Management Inc. | 174,600 | 0.81% | $6.5 million | 0.35% | new | 13F |
| Tudor Investment Corp. Et Al | 169,848 | 0.79% | $6.4 million | 0.03% | new | 13F |
| Anchor Capital Advisors LLC | 161,768 | 0.75% | $6.1 million | 0.09% | +80,326 | 13F |
| Lord, Abbett & Co. LLC | 152,175 | 0.70% | $5.7 million | 0.02% | new | 13F |
| Wealthspire Advisors, LLC | 141,607 | 0.65% | $5.3 million | 0.03% | no change | 13F |
| Pillsbury Lake Capital LLC | 136,746 | 0.63% | $5.1 million | 1.41% | new | 13F |
| Informed Momentum Co LLC | 129,182 | 0.60% | $4.8 million | 0.43% | new | 13F |
| Russell Investments Group, Ltd. | 125,513 | 0.58% | $4.7 million | 0.00% | -12,702 | 13F |
| Sei Investments Co. | 118,607 | 0.55% | $4.4 million | 0.00% | -4,271 | 13F |
| Empowered Funds, LLC | 116,570 | 0.54% | $4.4 million | 0.02% | -6,723 | 13F |
| Northern Trust Corp. | 114,995 | 0.53% | $4.3 million | 0.00% | +14,611 | 13F |
| BNP Paribas Financial Markets | 112,455 | 0.52% | $4.2 million | 0.00% | +109,657 | 13F |
| Needham Investment Management LLC | 110,000 | 0.51% | $4.1 million | 0.12% | +90,000 | 13F |
| Hunter Associates Investment Management LLC | 107,528 | 0.50% | $4.0 million | 0.46% | new | 13F |
| Trexquant Investment LP | 100,517 | 0.46% | $3.8 million | 0.02% | new | 13F |
| Morgan Stanley | 100,159 | 0.46% | $3.8 million | 0.00% | +76,325 | 13F |
| Vanguard Fiduciary Trust Co. | 98,709 | 0.46% | $3.7 million | 0.00% | +7,665 | 13F |
The 50 largest of the 157 funds that reported a position in MEC in their 13F for the quarter ended 30 June 2026, by the value each reported.
Read more
Share of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?Options the funds reported on MEC
| Fund | Option | Shares under the options | Value of those shares | Quarter ended | Filing |
|---|---|---|---|---|---|
| Citadel Advisors | Calls | 42,800 | $1.6 million | 30 June 2026 | 13F |
| Citadel Advisors | Puts | 24,900 | $932,754 | 30 June 2026 | 13F |
A 13F lists calls and puts by the shares they cover and what those shares were worth at the quarter's end, not what the options cost.
Read more
They are not counted in the holdings above. A put gains when the stock falls, a call when it rises, and a fund may hold either to hedge.Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 27 October 2026 | 13G | BlackRock, Inc. and 1 other | 1.6 million | 6.3% | 30 September 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 6 August 2026 | 13G | FMR LLC and 3 others | 1.3 million | 5.0% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 8 July 2026 | 13G/A | Allspring Global Investments Holdings, LLC and 1 other | 1.1 million | 4.2% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 28 May 2026 | 13G | Portolan Capital Management, LLC and 3 others | 1.5 million | 5.9% | 20 May 2026 | passive, under 20% (13d-1(c)) | EDGAR |
| 13 February 2026 | 13G/A | Hilve Holdings Ltd and 3 others | 995,756 | 4.9% | 27 October 2025 | passive, under 20% (13d-1(c)) | EDGAR |
| 8 January 2026 | 13G/A | Allspring Global Investments Holdings, LLC and 1 other | 2.1 million | 10.1% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
Read more
Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13GFails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 20 August 2026 | 5,665 | $22.59 | SEC |
| 17 August 2026 | 956 | $24.09 | SEC |
| 14 August 2026 | 20 | $23.40 | SEC |
| 12 August 2026 | 231 | $22.50 | SEC |
| 10 August 2026 | 114 | $24.18 | SEC |
| 4 August 2026 | 2,281 | $26.55 | SEC |
| 31 July 2026 | 6,743 | $25.89 | SEC |
| 30 July 2026 | 6,367 | $25.40 | SEC |
| 29 July 2026 | 2,748 | $27.81 | SEC |
| 28 July 2026 | 49 | $29.45 | SEC |
| 27 July 2026 | 398 | $30.29 | SEC |
| 24 July 2026 | 1,882 | $30.41 | SEC |
| 23 July 2026 | 2,226 | $30.10 | SEC |
| 22 July 2026 | 1,876 | $30.09 | SEC |
| 20 July 2026 | 344 | $30.92 | SEC |
| 17 July 2026 | 384 | $32.50 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.