MEC — MAYVILLE ENGR CO INC
As of Q2 2026, 29 SEC-registered investment managers reported holding MEC (MAYVILLE ENGR CO INC) in their latest 13F filings, with a combined reported value of $245.48M across 6.56M shares. That is +74.9% by share count (+2.81M shares) versus the previous quarter, while reported value moved +264.4%. Ownership is concentrated: the five largest holders account for 62.1% of reported value and the top ten for 85.2%.
Compared with the prior quarter, 5 opened new positions, 15 added to existing stakes, 7 trimmed, 1 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.
MEC is classified in the Industrials sector.
All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.
| Fund | Quarter | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|---|
| Fidelity Management & Research (FMR) history | Q2 2026 | 1.28M | $47.96M | 0.00% | Add |
| BlackRock Inc history | Q2 2026 | 1.18M | $44.33M | 0.00% | Add |
| Royce & Associates history | Q2 2026 | 752.08K | $28.17M | 0.23% | Hold |
| Wellington Management Group history | Q2 2026 | 477.58K | $17.89M | 0.00% | New |
| Geode Capital Management history | Q2 2026 | 374.58K | $14.04M | 0.00% | Add |
| First Eagle Investment Management history | Q2 2026 | 369.57K | $13.84M | 0.02% | Reduce |
| JPMorgan Chase & Co history | Q2 2026 | 347.22K | $13.03M | 0.00% | New |
| Vanguard Group history | Q4 2025 | 627.65K | $11.75M | 0.00% | Reduce |
| Bank of America Corp history | Q2 2026 | 276.32K | $10.35M | 0.00% | Add |
| Citadel Advisors history | Q2 2026 | 266.41K | $9.98M | 0.00% | Add |
| Millennium Management history | Q2 2026 | 253.68K | $9.50M | 0.00% | Reduce |
| Two Sigma Investments history | Q2 2026 | 198.91K | $7.45M | 0.01% | Add |
| Northern Trust Corp history | Q2 2026 | 115.00K | $4.31M | 0.00% | Add |
| Morgan Stanley history | Q2 2026 | 100.16K | $3.75M | 0.00% | Add |
| Arrowstreet Capital history | Q1 2026 | 185.26K | $3.33M | 0.00% | Reduce |
| UBS Group AG history | Q2 2026 | 82.66K | $3.10M | 0.00% | Reduce |
| Invesco Ltd history | Q2 2026 | 75.33K | $2.82M | 0.00% | Add |
| Polen Capital Management history | Q2 2026 | 61.83K | $2.32M | 0.02% | New |
| Citigroup Inc history | Q2 2026 | 52.62K | $1.97M | 0.00% | Add |
| Goldman Sachs Group history | Q2 2026 | 51.99K | $1.95M | 0.00% | Reduce |
New Positions (Q2 2026)
- Wellington Management Group 477.58K sh · $17.89M
- JPMorgan Chase & Co 347.22K sh · $13.03M
- Polen Capital Management 61.83K sh · $2.32M
- Balyasny Asset Management 47.05K sh · $1.76M
- T. Rowe Price Associates 12.03K sh · $451
Fully Exited (vs previous quarter)
- Arrowstreet Capital sold 185.26K sh · $3.33M
Fund Position History — shares by quarter (top 20 funds)
| Fund | Q3 2021 | Q4 2021 | Q1 2022 | Q2 2022 | Q3 2022 | Q4 2022 | Q1 2023 | Q2 2023 | Q3 2023 | Q4 2023 | Q1 2024 | Q2 2024 | Q3 2024 | Q4 2024 | Q1 2025 | Q2 2025 | Q3 2025 | Q4 2025 | Q1 2026 | Q2 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fidelity Management & Research (FMR) | — | — | 3.33K | 3.30K | 3.30K | 3.47K | 3.08K | 2.90K | 2.96K | 2.97K | 3.08K | 3.08K | 3.13K | 3.15K | 3.10K | 3.15K | 3.27K | 3.33K | 4.26K | 1.28M |
| BlackRock Inc | — | — | — | — | — | — | — | — | — | — | — | — | 897.61K | 848.76K | 849.59K | 913.19K | 914.84K | 865.62K | 881.85K | 1.18M |
| Royce & Associates | — | — | — | — | — | 173.05K | 209.41K | 334.11K | 576.36K | 635.96K | 650.39K | 660.17K | 560.55K | 584.30K | 591.32K | 558.85K | 566.72K | 624.31K | 751.00K | 752.08K |
| Wellington Management Group | 406.25K | 305.00K | 235.35K | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 477.58K |
| Geode Capital Management | 152.08K | 145.02K | 151.01K | 78.15K | 78.15K | 85.29K | 93.13K | 201.84K | 217.06K | 231.44K | 231.21K | 263.56K | 277.68K | 277.45K | 290.77K | 318.32K | 334.87K | 328.92K | 335.83K | 374.58K |
| First Eagle Investment Management | — | — | — | — | — | — | — | — | — | — | 49.74K | 250.78K | 299.88K | 332.38K | 351.88K | 354.07K | 354.57K | 358.07K | 404.07K | 369.57K |
| JPMorgan Chase & Co | 7.19K | 3.48K | 4.24K | 40 | 40 | 453 | 48.01K | 8.84K | 7.20K | 8.21K | 4.81K | 6.40K | 5.69K | 6.15K | 6.58K | 7.94K | 6.49K | 5.55K | — | 347.22K |
| Bank of America Corp | 82.30K | 76.11K | 82.31K | 145.57K | 161.31K | 135.97K | 145.54K | 145.27K | 157.75K | 160.79K | 157.97K | 165.48K | 214.46K | 216.93K | 240.23K | 227.70K | 208.97K | 218.89K | 183.60K | 276.32K |
| Citadel Advisors | — | — | 78.24K | 101.27K | 74.89K | — | 21.12K | 113.45K | 65.18K | 32.90K | 16.88K | 24.64K | 22.83K | 20.03K | 158.35K | 15.99K | — | 103.46K | 56.79K | 266.41K |
| Millennium Management | — | 20.43K | 48.76K | 226.84K | 193.59K | 87.12K | 111.00K | 14.63K | 15.35K | 14.17K | — | — | — | 30.34K | 112.35K | — | — | 153.20K | 380.97K | 253.68K |
| Two Sigma Investments | — | — | — | — | 30.33K | 35.37K | 18.40K | 37.69K | — | — | 13.79K | 10.98K | — | — | — | — | — | — | 34.71K | 198.91K |
| Northern Trust Corp | 76.35K | 78.21K | 72.92K | 14.22K | 14.22K | 15.19K | 16.99K | 86.06K | 86.07K | 97.47K | 89.97K | 88.20K | 98.20K | 101.33K | 99.91K | 101.74K | 109.23K | 94.37K | 100.38K | 115.00K |
| Morgan Stanley | 15.81K | 23.80K | 14.72K | 26.11K | 35.58K | 29.43K | 154.03K | 13.16K | 13.54K | 27.66K | 21.12K | 30.39K | 57.45K | 44.87K | 28.85K | 62.30K | 35.00K | 82.39K | 23.83K | 100.16K |
| UBS Group AG | 350 | 111.56K | 135.61K | 160.52K | 162.20K | 165.56K | 166.42K | 191.15K | 220.50K | 226.46K | 218.08K | 220.47K | 156.26K | 73.80K | 26.16K | 87.53K | 105.75K | 146.55K | 116.57K | 82.66K |
| Invesco Ltd | 105.01K | — | 26.92K | 30.37K | 28.74K | 28.59K | 169.18K | 189.71K | 52.98K | 36.32K | 69.74K | 261.94K | 218.87K | 36.00K | 32.77K | 29.42K | 26.19K | 27.87K | 27.03K | 75.33K |
| Polen Capital Management | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 61.83K |
| Citigroup Inc | 1.18K | 2.28K | 386 | 86 | — | 13.80K | 24.35K | 3.30K | 10 | 1.81K | 2.36K | 3.25K | 9.70K | 10.58K | 9.66K | 5.74K | 1.22K | 1.39K | 1.64K | 52.62K |
| Goldman Sachs Group | — | — | — | — | 23.96K | 22.26K | 37.46K | 15.57K | — | — | — | 51.55K | 151.96K | 213.76K | 113.53K | 85.57K | 92.98K | 89.75K | 64.91K | 51.99K |
| Balyasny Asset Management | — | — | — | — | — | — | — | — | 10.63K | — | — | — | — | — | — | — | — | — | — | 47.05K |
| Charles Schwab Investment Management | 22.34K | 22.34K | 24.08K | — | — | — | — | 28.58K | 28.58K | 28.52K | 28.52K | 32.49K | 34.25K | 34.25K | 34.25K | 39.13K | 39.13K | 43.45K | 40.10K | 45.86K |
▲ Bought Low (fund opened/added, stock rose ≥5% next quarter) ▼ Sold High (fund reduced, stock fell ≥5% next quarter)
Drag / scroll to zoom · Default shows the most recent year · Annotations come from quarterly fund actions in 13F filings · Hover a marker for details