Wellington Management Group’s Mayville Engineering Co MEC Stock Holding History

Wellington Management Group’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	$17.9M	Buy	+477,583	New	+$12.8M	﹤0.01%	1112
2022 Q2	–	Sell	-235,355	Closed	-$2.21M	–	2149
2022 Q1	$2.21M	Sell	235,355 -69,643	-23%	-$790K	﹤0.01%	1576
2021 Q4	$4.55M	Sell	304,998 -101,254	-25%	-$1.67M	﹤0.01%	1488
2021 Q3	$7.64M	Sell	406,252 -1,055,827	-72%	-$18.1M	﹤0.01%	1369
2021 Q2	$29.4M	Buy	1,462,079 +112,817	+8%	+$1.99M	﹤0.01%	999
2021 Q1	$19.4M	Buy	1,349,262 +85,212	+7%	+$1.26M	﹤0.01%	1083
2020 Q4	$17M	Buy	1,264,050 +163,534	+15%	+$1.81M	﹤0.01%	1075
2020 Q3	$10.1M	Buy	1,100,516 +450,978	+69%	+$3.81M	﹤0.01%	1097
2020 Q2	$5.13M	Buy	649,538 +177,759	+38%	+$1.09M	﹤0.01%	1206
2020 Q1	$2.89M	Buy	471,779 +129,375	+38%	+$971K	﹤0.01%	1304
2019 Q4	$3.21M	Buy	+342,404	New	+$3.55M	﹤0.01%	1441

Other funds holding MEC

PCM

Portolan Capital Management Boston, Massachusetts $2.67B AUM 169.09% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

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 Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Royce & Associates New York $12.4B AUM 64.17% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return

Wellington Management Group's MEC Position: Q2 2026 in Review

Wellington Management Group opened a new position in Mayville Engineering Co (MEC) in Q2 2026: 477,583 shares worth $17.9M. The stake represents ﹤0.01% of the portfolio and ranks #1112 among its holdings. This is a return to the name: Wellington Management Group previously reported a position in MEC as recently as Q1 2022.

Wellington Management Group first reported a position in MEC in Q4 2019 and has held it in 11 quarters since. The position peaked at $29.4M in Q2 2021. 155 funds tracked by Wall St. Rank hold MEC as of Q2 2026.

Wellington Management Group held 477,583 shares of Mayville Engineering Co worth $17.9M as of Q2 2026.
Mayville Engineering Co was a new Wellington Management Group position in Q2 2026.
Mayville Engineering Co made up ﹤0.01% of Wellington Management Group's portfolio in Q2 2026, its #1112 holding.
Wellington Management Group first reported a position in Mayville Engineering Co in Q4 2019 and has held it in 11 quarters since.
Wellington Management Group's Mayville Engineering Co position peaked at $29.4M in Q2 2021.
155 funds tracked by Wall St. Rank held Mayville Engineering Co as of Q2 2026.

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