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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
Q2 		$12.1M Sell
324,108
-63,362
-16% -$1.69M 0.43% 55
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

PCM
Portolan Capital Management Boston, Massachusetts $2.67B AUM 169.09% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Allspring Global Investments
Allspring Global Investments Charlotte, North Carolina $65.2B AUM 39.42% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $17.3B AUM 211.34% 1-Year Est. Return
SPPAM
Summit Partners Public Asset Management Boston, Massachusetts $5.69B AUM 259.25% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
RA
Royce & Associates New York $12.4B AUM 64.17% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return

Granahan Investment Management's MEC Position: Q2 2026 in Review

Granahan Investment Management reduced its Mayville Engineering Co (MEC) stake by 16% in Q2 2026, selling an estimated $1.69M and leaving 324,108 shares worth $12.1M. The position accounts for 0.43% of the portfolio, ranked #55.

Granahan Investment Management first reported a position in MEC in Q3 2023 and has held it in 12 quarters since. 155 funds tracked by Wall St. Rank hold MEC as of Q2 2026.

  • Granahan Investment Management held 324,108 shares of Mayville Engineering Co worth $12.1M as of Q2 2026.
  • Granahan Investment Management sold 63,362 Mayville Engineering Co shares in Q2 2026, an estimated $1.69M.
  • Mayville Engineering Co made up 0.43% of Granahan Investment Management's portfolio in Q2 2026, its #55 holding.
  • Granahan Investment Management first reported a position in Mayville Engineering Co in Q3 2023 and has held it in 12 quarters since.
  • 155 funds tracked by Wall St. Rank held Mayville Engineering Co as of Q2 2026.

Based on Granahan Investment Management's 13F filing for Q2 2026, filed 14 Aug 2026.