Mayville Engineering Company (MEC)
Mayville Engineering Company on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, earnings dates and insider trades. Listed on NYSE, classified by the SEC as metal forgings & stampings.
2.4M
Short interest
settlement 2026-09-30
3.5
Days to cover
-1.7 days vs prior
43.5%
Short share of volume
2026-10-23
223
Fails to deliver
settlement 2026-09-28
Tue 3 Nov
Next earnings
estimated date
-$327K
Insider flow, 90 days
0 buys, 1 sells
As of 2026-10-23.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 30 September 2026, short interest in MEC is 2,443,538 shares, up 579,028 shares over the last month. Over the last 48 readings it ranged from 118,751 shares (31 October 2024) to 2,443,538 shares (30 September 2026). The latest reading sits at the top of that range. At the reported average volume of 692K shares a day that is 3.5 days to cover.
Embed this chart.The embed keeps its attribution line.
<iframe src="https://xoomar.com/embed/stocks/mec" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-09-30 | 2,443,538 | +22.9% | 692,019 | 3.53 |
| 2026-09-15 | 1,988,864 | +6.7% | 377,974 | 5.26 |
| 2026-08-31 | 1,864,510 | -10.8% | 555,059 | 3.36 |
| 2026-08-14 | 2,091,358 | +0.9% | 752,467 | 2.78 |
| 2026-07-31 | 2,073,434 | +47.8% | 627,152 | 3.31 |
| 2026-07-15 | 1,403,086 | +3.7% | 429,838 | 3.26 |
| 2026-06-30 | 1,352,905 | +30.1% | 590,878 | 2.29 |
| 2026-06-15 | 1,040,215 | +24.8% | 867,852 | 1.20 |
| 2026-05-29 | 833,816 | -1.7% | 630,685 | 1.32 |
| 2026-05-15 | 847,984 | -8.0% | 339,925 | 2.49 |
| 2026-04-30 | 922,032 | +4.3% | 111,108 | 8.30 |
| 2026-04-15 | 883,600 | +7.5% | 128,236 | 6.89 |
| 2026-03-31 | 821,921 | +3.5% | 142,796 | 5.76 |
| 2026-03-13 | 793,901 | +9.8% | 271,168 | 2.93 |
| 2026-02-27 | 723,030 | -6.2% | 120,053 | 6.02 |
| 2026-02-13 | 771,033 | -6.2% | 161,737 | 4.77 |
| 2026-01-30 | 822,166 | -11.9% | 137,649 | 5.97 |
| 2026-01-15 | 933,021 | +2.2% | 189,853 | 4.91 |
| 2025-12-31 | 912,662 | -17.6% | 194,279 | 4.70 |
| 2025-12-15 | 1,106,915 | +18.8% | 148,015 | 7.48 |
| 2025-11-28 | 931,703 | +8.8% | 298,138 | 3.13 |
| 2025-11-14 | 856,760 | -1.0% | 246,832 | 3.47 |
| 2025-10-31 | 865,306 | +35.2% | 318,786 | 2.71 |
| 2025-10-15 | 640,098 | +7.1% | 99,686 | 6.42 |
| 2025-09-30 | 597,434 | +4.3% | 142,498 | 4.19 |
| 2025-09-15 | 572,974 | +19.2% | 111,850 | 5.12 |
| 2025-08-29 | 480,689 | -3.0% | 102,880 | 4.67 |
| 2025-08-15 | 495,482 | -2.1% | 210,791 | 2.35 |
| 2025-07-31 | 506,374 | +7.8% | 106,266 | 4.77 |
| 2025-07-15 | 469,638 | +12.7% | 92,057 | 5.10 |
| 2025-06-30 | 416,612 | +34.8% | 171,938 | 2.42 |
| 2025-06-13 | 308,995 | +6.2% | 108,417 | 2.85 |
| 2025-05-30 | 290,986 | +27.9% | 113,760 | 2.56 |
| 2025-05-15 | 227,522 | +9.0% | 119,118 | 1.91 |
| 2025-04-30 | 208,723 | -4.6% | 119,128 | 1.75 |
| 2025-04-15 | 218,819 | -0.2% | 86,848 | 2.52 |
| 2025-03-31 | 219,166 | -11.1% | 96,601 | 2.27 |
| 2025-03-14 | 246,380 | -8.0% | 185,779 | 1.33 |
| 2025-02-28 | 267,917 | +5.0% | 65,439 | 4.09 |
| 2025-02-14 | 255,239 | +4.5% | 45,794 | 5.57 |
| 2025-01-31 | 244,180 | -3.6% | 73,105 | 3.34 |
| 2025-01-15 | 253,432 | -12.7% | 104,537 | 2.42 |
| 2024-12-31 | 290,235 | +16.8% | 133,695 | 2.17 |
| 2024-12-13 | 248,433 | +10.4% | 93,769 | 2.65 |
| 2024-11-29 | 225,065 | +8.8% | 85,634 | 2.63 |
| 2024-11-15 | 206,773 | +74.1% | 289,366 | 1.00 |
| 2024-10-31 | 118,751 | -20.4% | 64,714 | 1.84 |
| 2024-10-15 | 149,104 | -35.7% | 96,290 | 1.55 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 23 October 2026, the short share of MEC volume is 43.5%, up 0.5 points over the last five sessions. Over the last 30 readings it ranged from 24.0% (17 September 2026) to 73.3% (24 September 2026). The latest reading is 3.6 points below the 30-session average of 47.2%, on 186K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-23 | 81K | 186K | 43.5% | 2,460 |
| 2026-10-22 | 82K | 199K | 41.3% | 401 |
| 2026-10-21 | 120K | 194K | 62.1% | 0 |
| 2026-10-20 | 79K | 114K | 69.0% | 0 |
| 2026-10-19 | 86K | 156K | 55.2% | 0 |
| 2026-10-16 | 66K | 152K | 43.0% | 0 |
| 2026-10-15 | 67K | 126K | 53.1% | 0 |
| 2026-10-14 | 65K | 167K | 38.8% | 0 |
| 2026-10-13 | 41K | 96K | 43.1% | 27 |
| 2026-10-12 | 38K | 148K | 25.7% | 0 |
| 2026-10-09 | 21K | 61K | 34.9% | 0 |
| 2026-10-08 | 77K | 139K | 55.4% | 68 |
| 2026-10-07 | 89K | 244K | 36.6% | 0 |
| 2026-10-06 | 39K | 96K | 40.3% | 0 |
| 2026-10-05 | 97K | 200K | 48.4% | 0 |
| 2026-10-02 | 104K | 189K | 55.0% | 0 |
| 2026-10-01 | 173K | 482K | 35.8% | 100 |
| 2026-09-30 | 148K | 324K | 45.7% | 959 |
| 2026-09-29 | 206K | 317K | 65.2% | 0 |
| 2026-09-28 | 206K | 297K | 69.6% | 0 |
| 2026-09-25 | 146K | 241K | 60.6% | 0 |
| 2026-09-24 | 102K | 140K | 73.3% | 0 |
| 2026-09-23 | 144K | 269K | 53.5% | 5 |
| 2026-09-22 | 90K | 309K | 29.1% | 0 |
| 2026-09-21 | 61K | 147K | 41.6% | 0 |
| 2026-09-18 | 90K | 216K | 41.7% | 0 |
| 2026-09-17 | 50K | 208K | 24.0% | 0 |
| 2026-09-16 | 54K | 152K | 35.4% | 3,292 |
| 2026-09-15 | 72K | 201K | 36.0% | 2,629 |
| 2026-09-14 | 83K | 143K | 58.3% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 28 September 2026, the fails-to-deliver balance in MEC is 223 shares, down 20,132 shares over the last settlement date. Over the last 30 readings it ranged from 20 shares (14 August 2026) to 56,849 shares (1 May 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-28 | 223 | $17.16 | $4K |
| 2026-09-21 | 20,355 | $17.20 | $350K |
| 2026-09-17 | 319 | $17.32 | $6K |
| 2026-08-20 | 5,665 | $22.59 | $128K |
| 2026-08-17 | 956 | $24.09 | $23K |
| 2026-08-14 | 20 | $23.40 | $468 |
| 2026-08-12 | 231 | $22.50 | $5K |
| 2026-08-10 | 114 | $24.18 | $3K |
| 2026-08-04 | 2,281 | $26.55 | $61K |
| 2026-07-31 | 6,743 | $25.89 | $175K |
| 2026-07-30 | 6,367 | $25.40 | $162K |
| 2026-07-29 | 2,748 | $27.81 | $76K |
| 2026-07-28 | 49 | $29.45 | $1K |
| 2026-07-27 | 398 | $30.29 | $12K |
| 2026-07-24 | 1,882 | $30.41 | $57K |
| 2026-07-23 | 2,226 | $30.10 | $67K |
| 2026-07-22 | 1,876 | $30.09 | $56K |
| 2026-07-20 | 344 | $30.92 | $11K |
| 2026-07-17 | 384 | $32.50 | $12K |
| 2026-07-07 | 349 | $34.41 | $12K |
| 2026-07-06 | 419 | $33.55 | $14K |
| 2026-06-25 | 3,042 | $34.39 | $105K |
| 2026-06-16 | 163 | $34.74 | $6K |
| 2026-06-10 | 139 | $34.74 | $5K |
| 2026-06-09 | 100 | $33.60 | $3K |
| 2026-05-20 | 707 | $23.55 | $17K |
| 2026-05-19 | 527 | $24.92 | $13K |
| 2026-05-11 | 1,647 | $27.20 | $45K |
| 2026-05-04 | 54,453 | $22.24 | $1.2M |
| 2026-05-01 | 56,849 | $22.81 | $1.3M |
Insider trades
SEC Form 4, newest first. JSONInsiders at MEC reported 1 open-market sell worth $327K in the last 90 days and no open-market buys. Latest filing: Leuba Sean P (SVP, GC & Secretary) on 2026-08-06.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-08-06 | Leuba Sean P | SVP, GC & Secretary | Sell | 13K | $25.44 | $327K | 7K |
| 2026-06-11 | Reddy Jagadeesh A | President & CEO | Sell | 16K | $35.05 | $550K | 124K |
| 2026-06-08 | Reddy Jagadeesh A | President & CEO | Sell | 1K | $35.01 | $46K | 140K |
| 2026-06-01 | Reddy Jagadeesh A | President & CEO | Sell | 17K | $30.00 | $519K | 141K |
| 2026-06-01 | Reddy Jagadeesh A | President & CEO | Sell | 18K | $30.00 | $538K | 140K |
| 2026-05-26 | Raber Ryan F | EVP - Strategy, Sales & Mktg | Sell | 20K | $26.00 | $520K | 87K |
| 2026-05-21 | Nichols Craig D | SVP, Operations & Supply Chain | Sell | 4K | $23.24 | $93K | 146 |
| 2026-05-08 | Leuba Sean P | SVP, GC & Secretary | Gift | 1K | $0.00 | $0 | 19K |
| 2026-05-07 | Reddy Jagadeesh A | President & CEO | Sell | 11K | $26.11 | $299K | 158K |
| 2026-05-07 | Reddy Jagadeesh A | President & CEO | Sell | 10K | $25.72 | $266K | 170K |
| 2026-04-21 | Wingfield Tania | Director | Exercise or conversion | 6K | $0.00 | $0 | 6K |
| 2026-04-21 | McCormick Robert L | Director | Exercise or conversion | 10K | $0.00 | $0 | 29K |
| 2026-04-21 | Fisher Steven L | Director | Exercise or conversion | 10K | $0.00 | $0 | 81K |
| 2026-04-21 | Fisher Steven L | Director | Exercise or conversion | 14K | $0.00 | $0 | 70K |
| 2026-04-21 | Fisher Steven L | Director | Exercise or conversion | 20K | $0.00 | $0 | 56K |
| 2026-04-21 | Fisher Steven L | Director | Exercise or conversion | 6K | $0.00 | $0 | 36K |
| 2026-04-21 | Christen Timothy L | Director | Exercise or conversion | 12K | $0.00 | $0 | 154K |
| 2026-03-15 | Reddy Jagadeesh A | President & CEO | Tax withholding | 30K | $16.67 | $501K | 180K |
| 2026-03-15 | Reddy Jagadeesh A | President & CEO | Exercise or conversion | 28K | $0.00 | $0 | 210K |
| 2026-03-15 | Reddy Jagadeesh A | President & CEO | Exercise or conversion | 36K | $0.00 | $0 | 183K |
| 2026-03-15 | Raber Ryan F | EVP - Strategy, Sales & Mktg | Tax withholding | 14K | $16.67 | $236K | 107K |
| 2026-03-15 | Raber Ryan F | EVP - Strategy, Sales & Mktg | Exercise or conversion | 12K | $0.00 | $0 | 121K |
| 2026-03-15 | Raber Ryan F | EVP - Strategy, Sales & Mktg | Exercise or conversion | 18K | $0.00 | $0 | 109K |
| 2026-03-15 | Nichols Craig D | SVP, Operations & Supply Chain | Tax withholding | 2K | $16.67 | $28K | 4K |
| 2026-03-15 | Nichols Craig D | SVP, Operations & Supply Chain | Exercise or conversion | 6K | $0.00 | $0 | 6K |
| 2026-03-15 | Leuba Sean P | SVP, Corp. Development & GC | Tax withholding | 5K | $16.67 | $88K | 18K |
| 2026-03-15 | Leuba Sean P | SVP, Corp. Development & GC | Exercise or conversion | 5K | $0.00 | $0 | 24K |
| 2026-03-15 | Leuba Sean P | SVP, Corp. Development & GC | Exercise or conversion | 7K | $0.00 | $0 | 19K |
| 2026-03-15 | Lehr Rachele Marie | Chief Financial Officer | Tax withholding | 5K | $16.67 | $77K | 31K |
| 2026-03-15 | Lehr Rachele Marie | Chief Financial Officer | Exercise or conversion | 6K | $0.00 | $0 | 35K |
| 2026-03-15 | Lehr Rachele Marie | Chief Financial Officer | Exercise or conversion | 9K | $0.00 | $0 | 29K |
| 2026-03-05 | Leuba Sean P | GC & Secretary | Sell | 7K | $18.81 | $126K | 12K |
| 2026-03-05 | Leuba Sean P | GC & Secretary | Sell | 3K | $20.07 | $50K | 0 |
| 2025-12-11 | Fisher Steven L | Director | Sell | 5K | $19.14 | $96K | 30K |
| 2025-12-11 | Fisher Steven L | Director | Sell | 5K | $19.08 | $95K | 35K |
| 2025-11-25 | Raber Ryan F | EVP - Strategy, Sales & Mktg | Sell | 3K | $16.63 | $42K | 91K |
| 2025-11-25 | Raber Ryan F | EVP - Strategy, Sales & Mktg | Sell | 13K | $16.69 | $209K | 94K |
| 2025-11-06 | Nichols Craig D | SVP, Operations & Supply Chain | Grant | 1K | $15.95 | $18K | 1K |
| 2025-08-11 | Leuba Sean P | SVP, Corp. Development & GC | Buy | 500 | $13.56 | $7K | 3K |
| 2025-08-08 | Lehr Rachele Marie | Chief Financial Officer | Buy | 1K | $14.08 | $20K | 21K |
| 2025-08-07 | Reddy Jagadeesh A | President & CEO | Buy | 8K | $14.06 | $105K | 146K |
| 2025-07-19 | Reddy Jagadeesh A | President & CEO | Tax withholding | 15K | $15.30 | $230K | 139K |
| 2025-07-19 | Reddy Jagadeesh A | President & CEO | Exercise or conversion | 32K | $0.00 | $0 | 154K |
| 2025-04-16 | Christen Timothy L | Director,Other | Exercise or conversion | 11K | $0.00 | $0 | 141K |
| 2025-04-16 | Fisher Steven L | Director | Exercise or conversion | 9K | $0.00 | $0 | 40K |
| 2025-04-16 | Kent Jennifer J. | Director | Exercise or conversion | 9K | $0.00 | $0 | 25K |
| 2025-04-16 | McCormick Robert L | Director | Exercise or conversion | 9K | $0.00 | $0 | 19K |
| 2025-04-16 | CARLSON ALLEN J | Director | Exercise or conversion | 9K | $0.00 | $0 | 75K |
| 2025-03-15 | Raber Ryan F | EVP - Strategy, Sales & Mktg | Exercise or conversion | 18K | $0.00 | $0 | 114K |
| 2025-03-15 | Raber Ryan F | EVP - Strategy, Sales & Mktg | Tax withholding | 8K | $14.35 | $119K | 106K |
| 2025-03-15 | Butz Todd M | Chief Financial Officer | Tax withholding | 6K | $14.35 | $81K | 174K |
| 2025-03-15 | Butz Todd M | Chief Financial Officer | Exercise or conversion | 18K | $0.00 | $0 | 179K |
| 2025-03-15 | Reddy Jagadeesh A | President & CEO | Tax withholding | 17K | $14.35 | $245K | 122K |
| 2025-03-15 | Reddy Jagadeesh A | President & CEO | Exercise or conversion | 36K | $0.00 | $0 | 139K |
| 2025-03-15 | Leuba Sean P | SVP, Corp. Development & GC | Tax withholding | 3K | $14.35 | $46K | 19K |
| 2025-03-15 | Leuba Sean P | SVP, Corp. Development & GC | Exercise or conversion | 7K | $0.00 | $0 | 22K |
| 2025-03-15 | Lehr Rachele Marie | Chief Human Resources Officer | Tax withholding | 3K | $14.35 | $39K | 19K |
| 2025-03-15 | Lehr Rachele Marie | Chief Human Resources Officer | Exercise or conversion | 9K | $0.00 | $0 | 22K |
| 2025-03-12 | Reddy Jagadeesh A | President & CEO | Buy | 380 | $13.75 | $5K | 380 |
| 2025-03-06 | Leuba Sean P | SVP, Corp. Development & GC | Buy | 1K | $14.18 | $14K | 2K |
| 2025-02-28 | Raber Ryan F | EVP - Strategy, Sales & Mktg | Tax withholding | 6K | $14.95 | $90K | 97K |
| 2025-02-28 | Raber Ryan F | EVP - Strategy, Sales & Mktg | Exercise or conversion | 13K | $0.00 | $0 | 103K |
| 2025-02-28 | Reddy Jagadeesh A | President & CEO | Exercise or conversion | 25K | $0.00 | $0 | 114K |
| 2025-02-28 | Reddy Jagadeesh A | President & CEO | Tax withholding | 12K | $14.95 | $179K | 103K |
| 2025-02-28 | Butz Todd M | Chief Financial Officer | Tax withholding | 4K | $14.95 | $55K | 162K |
| 2025-02-28 | Butz Todd M | Chief Financial Officer | Exercise or conversion | 12K | $0.00 | $0 | 165K |
| 2025-02-28 | Leuba Sean P | SVP, Corp. Development & GC | Exercise or conversion | 6K | $0.00 | $0 | 17K |
| 2025-02-28 | Leuba Sean P | SVP, Corp. Development & GC | Tax withholding | 3K | $14.95 | $41K | 14K |
| 2025-02-28 | Lehr Rachele Marie | Chief Human Resources Officer | Tax withholding | 3K | $14.95 | $42K | 14K |
| 2025-02-28 | Lehr Rachele Marie | Chief Human Resources Officer | Exercise or conversion | 9K | $0.00 | $0 | 16K |
| 2025-01-09 | Leuba Sean P | SVP, Corp. Development & GC | Exercise or conversion | 6K | $0.00 | $0 | 14K |
| 2025-01-09 | Leuba Sean P | SVP, Corp. Development & GC | Tax withholding | 3K | $15.00 | $43K | 11K |
| 2024-11-07 | Leuba Sean P | SVP, Corp. Development & GC | Buy | 1K | $16.13 | $16K | 1K |
| 2024-11-07 | Reddy Jagadeesh A | President & CEO | Buy | 6K | $16.72 | $99K | 89K |
| 2024-11-07 | Lehr Rachele Marie | Chief Human Resources Officer | Buy | 2K | $15.90 | $24K | 8K |
| 2024-11-07 | Butz Todd M | Chief Financial Officer | Buy | 1K | $15.79 | $20K | 41K |
| 2024-08-23 | Raber Ryan F | EVP - Strategy, Sales & Mktg | Sell | 22K | $19.15 | $412K | 97K |
| 2024-08-22 | Raber Ryan F | EVP - Strategy, Sales & Mktg | Exercise or conversion | 59K | $0.00 | $0 | 156K |
| 2024-08-22 | Raber Ryan F | EVP - Strategy, Sales & Mktg | Tax withholding | 37K | $19.15 | $718K | 119K |
| 2024-08-21 | Butz Todd M | Chief Financial Officer | Exercise or conversion | 88K | $0.00 | $0 | 213K |
| 2024-08-21 | Butz Todd M | Chief Financial Officer | Tax withholding | 59K | $19.15 | $1.1M | 154K |
| 2024-07-19 | Reddy Jagadeesh A | President & CEO | Exercise or conversion | 32K | $0.00 | $0 | 98K |
| 2024-07-19 | Reddy Jagadeesh A | President & CEO | Tax withholding | 15K | $18.53 | $279K | 83K |
| 2024-04-16 | McCormick Robert L | Director | Exercise or conversion | 10K | $0.00 | $0 | 10K |
| 2024-04-16 | Rothman Jay O. | Director | Exercise or conversion | 10K | $0.00 | $0 | 25K |
| 2024-04-16 | Fisher Steven L | Director | Exercise or conversion | 10K | $0.00 | $0 | 31K |
| 2024-04-16 | Christen Timothy L | Director,Other | Exercise or conversion | 12K | $0.00 | $0 | 131K |
| 2024-04-16 | CARLSON ALLEN J | Director | Exercise or conversion | 10K | $0.00 | $0 | 66K |
| 2024-04-16 | Kent Jennifer J. | Director | Exercise or conversion | 10K | $0.00 | $0 | 16K |
| 2024-03-15 | Reddy Jagadeesh A | President & CEO | Buy | 2K | $12.85 | $20K | 2K |
| 2024-02-28 | Reddy Jagadeesh A | President & CEO | Exercise or conversion | 25K | $0.00 | $0 | 74K |
| 2024-02-28 | Reddy Jagadeesh A | President & CEO | Tax withholding | 8K | $11.97 | $97K | 66K |
| 2024-02-28 | Leuba Sean P | SVP, Corp. Development & GC | Exercise or conversion | 6K | $0.00 | $0 | 10K |
| 2024-02-28 | Leuba Sean P | SVP, Corp. Development & GC | Tax withholding | 2K | $11.97 | $22K | 8K |
| 2024-02-28 | Raber Ryan F | EVP - Strategy, Sales & Mktg | Exercise or conversion | 33K | $0.00 | $0 | 108K |
| 2024-02-28 | Raber Ryan F | EVP - Strategy, Sales & Mktg | Tax withholding | 11K | $11.97 | $126K | 97K |
| 2024-02-28 | Butz Todd M | Chief Financial Officer | Tax withholding | 10K | $11.97 | $114K | 125K |
| 2024-02-28 | Butz Todd M | Chief Financial Officer | Exercise or conversion | 30K | $0.00 | $0 | 134K |
| 2024-02-28 | Lehr Rachele Marie | Chief Human Resources Officer | Tax withholding | 3K | $11.97 | $34K | 6K |
| 2024-02-28 | Lehr Rachele Marie | Chief Human Resources Officer | Exercise or conversion | 9K | $0.00 | $0 | 9K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON6 Form 144 notices on file for MEC worth $1.9M at the prices reported; 2 in the last 90 days worth $335K. Latest: Leuba Sean P filed on 2026-08-06 to sell 1,015 shares ($26K) from 2026-08-06.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-08-06 | Leuba Sean POfficer | 1K | $26K | 0.004% | 2026-08-06 | Vanguard Marketing Corporation |
| 2026-08-06 | Leuba Sean POfficer | 12K | $309K | 0.046% | 2026-08-06 | Vanguard Marketing Corporation |
| 2026-06-11 | JAGADEESH REDDYDirector, Officer | 16K | $531K | 0.077% | 2026-06-11 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-08 | JAGADEESH REDDYDirector, Officer | 1K | $43K | 0.006% | 2026-06-08 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-01 | JAGADEESH REDDYDirector, Officer | 17K | $464K | 0.084% | 2026-06-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-07 | JAGADEESH A REDDYDirector, Officer | 22K | $509K | 0.106% | 2026-05-07 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON4 holders report 5% or more of MEC in their latest filing, all on Schedule 13G (passive). The largest reported stake is George McCabe at 5.9% of the class (1,465,004 shares), filed 2026-05-28 for an event on 2026-05-20.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-06 | 13G | FMR LLCparent holding company | 1.3M | 5.0% | 2026-06-30 |
| 2026-08-06 | 13G | Abigail P. Johnsonindividual | 1.3M | 5.0% | 2026-06-30 |
| 2026-07-08 | 13G/Ano. 5 | Allspring Global Investments Holdings, LLCparent holding company | 1.1M | 4.2% | 2026-06-30 |
| 2026-05-28 | 13G | George McCabeindividual | 1.5M | 5.9% | 2026-05-20 |
| 2026-05-28 | 13G | Portolan Capital Management, LLCinvestment adviser | 1.5M | 5.9% | 2026-05-20 |
| 2026-02-13 | 13G/Ano. 1 | Hilve Holdings Ltdcorporation | 996K | 4.9% | 2025-10-27 |
| 2026-02-13 | 13G/Ano. 1 | Mikhail Stiskinindividual | 996K | 4.9% | 2025-10-27 |
13F holders
Tracked managers holding MEC at their latest 13F. JSON5 of the 30 tracked managers held MEC at their latest 13F, $26.1M in total at quarter-end prices. Millennium Management is the largest at $9.5M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 3 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Millennium Management | 2026-06-30 | 254K | $9.5M | 0.00% | -127K |
| Two Sigma Investments | 2026-06-30 | 199K | $7.5M | 0.01% | +164K |
| Citadel Advisors | 2026-06-30 | 199K | $7.4M | 0.00% | +142K |
| Renaissance Technologies | 2026-06-30 | 28K | $1.0M | 0.00% | -35K |
| AQR Capital Management | 2026-06-30 | 18K | $683K | 0.00% | -2K |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
What this page is
Mayville Engineering Company in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Mayville Engineering Company (MEC), SEC CIK 1766368, listed on NYSE, classified by the SEC as metal forgings & stampings. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-09-30.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-23.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-28.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-08-06.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-08-06.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-04.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-08-06.JSON and CSV
- Company record
- EDGAR filing index for CIK 1766368Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
Other companies the SEC classifies as metal forgings & stampings
Other company pages
- MLMMartin Marietta Materials
- MMM3M
- MNSTMonster Beverage
- MOAltria Group
- MODModine Manufacturing
- MOSMosaic
- MPMP Materials
- MPCMarathon Petroleum
- MPWRMonolithic Power Systems
- MRKMerck
- MRNAModerna
- MRSHMarsh & McLennan Companies
- MRVLMarvell Technology
- MSMorgan Stanley
- MSCIMSCI
- MSFTMicrosoft
- MSIMotorola Solutions
- MSTRStrategy
- MTBM&T Bank
- MTCHMatch Group
- MTDMettler-Toledo International
Datasets
Frequently Asked Questions
How much of MEC is sold short?
2,443,538 shares were held short at the 2026-09-30 settlement, 3.5 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is MEC's daily short volume?
On 2026-10-23, 80,937 of the 185,911 MEC shares reported to FINRA were sold short, 43.5% of the day's reported volume. Short volume is a flow for one day, not a position.
Does MEC have fails to deliver?
The SEC's latest file shows 223 MEC shares failed to deliver at settlement 2026-09-28. Fails are reported per settlement date and published twice a month with a lag.
Are MEC insiders buying or selling?
Insiders at MEC reported 1 open-market sell worth $327K in the last 90 days and no open-market buys. Latest filing: Leuba Sean P (SVP, GC & Secretary) on 2026-08-06.
Have MEC insiders filed to sell?
6 Form 144 notices on file for MEC worth $1.9M at the prices reported; 2 in the last 90 days worth $335K. Latest: Leuba Sean P filed on 2026-08-06 to sell 1,015 shares ($26K) from 2026-08-06.
Who owns 5% or more of MEC?
4 holders report 5% or more of MEC in their latest filing, all on Schedule 13G (passive). The largest reported stake is George McCabe at 5.9% of the class (1,465,004 shares), filed 2026-05-28 for an event on 2026-05-20.
Which tracked 13F managers own MEC?
5 of the 30 tracked 13F managers held MEC shares at their latest filing, $26.1M in all. The largest: Izzy Englander's Millennium Management (254K shares, $9.5M), Two Sigma Investments (199K shares, $7.5M), Ken Griffin's Citadel Advisors (199K shares, $7.4M), Renaissance Technologies (28K shares, $1.0M), Cliff Asness's AQR Capital Management (18K shares, $683K).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.