Granahan Investment Management’s Mayville Engineering Co MEC Stock Holding History

Granahan Investment Management’s Portfolio MEC Stock Details MEC Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$6.96M	Buy	387,470 +119,708	+45%	+$2.3M	0.34%	71
2025 Q4	$5.01M	Sell	267,762 -81,505	-23%	-$1.33M	0.21%	106
2025 Q3	$4.81M	Sell	349,267 -149,038	-30%	-$2.24M	0.2%	102
2025 Q2	$7.95M	Buy	498,305 +20,267	+4%	+$290K	0.32%	77
2025 Q1	$6.42M	Sell	478,038 -100,929	-17%	-$1.52M	0.32%	82
2024 Q4	$9.1M	Buy	578,967 +240,752	+71%	+$4.4M	0.38%	74
2024 Q3	$7.13M	Buy	338,215 +13,781	+4%	+$258K	0.28%	102
2024 Q2	$5.41M	Buy	324,434 +133,371	+70%	+$2.02M	0.22%	121
2024 Q1	$2.74M	Buy	191,063 +46,785	+32%	+$610K	0.1%	153
2023 Q4	$2.08M	Buy	144,278 +128,944	+841%	+$1.6M	0.07%	158
2023 Q3	$168K	Buy	+15,334	New	+$177K	0.01%	182

Other funds holding MEC

Allspring Global Investments Charlotte, North Carolina $59.7B AUM 29.08% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

PCM

Portolan Capital Management Boston, Massachusetts $1.88B AUM 115.74% 1-Year Est. Return

Royce & Associates New York $10.1B AUM 42.88% 1-Year Est. Return

EVR Research Richmond, Virginia $250M AUM 41.5% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

William Blair & Company Chicago, Illinois $34.9B AUM 18.88% 1-Year Est. Return

First Eagle Investment Management New York $59B AUM 32.99% 1-Year Est. Return

Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Granahan Investment Management's MEC Position: Q1 2026 in Review

Granahan Investment Management increased its Mayville Engineering Co (MEC) stake by 45% in Q1 2026, buying an estimated $2.3M and bringing the position to 387,470 shares worth $6.96M. The position accounts for 0.34% of the portfolio, ranked #71.

Granahan Investment Management first reported a position in MEC in Q3 2023 and has held it in 11 quarters since. The position peaked at $9.1M in Q4 2024. 124 funds tracked by Wall St. Rank hold MEC as of Q1 2026.

Granahan Investment Management held 387,470 shares of Mayville Engineering Co worth $6.96M as of Q1 2026.
Granahan Investment Management bought 119,708 Mayville Engineering Co shares in Q1 2026, an estimated $2.3M.
Mayville Engineering Co made up 0.34% of Granahan Investment Management's portfolio in Q1 2026, its #71 holding.
Granahan Investment Management first reported a position in Mayville Engineering Co in Q3 2023 and has held it in 11 quarters since.
Granahan Investment Management's Mayville Engineering Co position peaked at $9.1M in Q4 2024.
124 funds tracked by Wall St. Rank held Mayville Engineering Co as of Q1 2026.

Based on Granahan Investment Management's 13F filing for Q1 2026, filed 15 May 2026.