MEC US Equity

Mayville Engineering Company, Inc.

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Industrials · Metal Forgings & Stampings · CIK 1766368 · FYE 1231

$27.81

-1.64 (-5.57%)

USD · as of 2026-07-28 · marketstack

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Institutional ownership· 13F filers holding MEC · 2026-Q1 methodology → sources →

123 holders

% of shares outstanding held

70.1%

Shares held (13F)

14,361,474

Reporting holders

123

Top holders

largest 100 of 123 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	Allspring Global Investments Holdings, LLC	2,000,3502.0M	$36M	9.76%	TRIM -3%
2	DIMENSIONAL FUND ADVISORS LP	926,216926,216	$17M	4.52%	ADD 6%
3	BlackRock, Inc.	881,854881,854	$16M	4.30%	—
4	Portolan Capital Management, LLC	821,136821,136	$15M	4.01%	ADD 60%
5	ROYCE & ASSOCIATES LP	751,001751,001	$13M	3.66%	ADD 20%
6	EVR Research LP	620,000620,000	$11M	3.03%	ADD 2%
7	VANGUARD CAPITAL MANAGEMENT LLC	594,938594,938	$11M	2.90%	NEW†
8	BLAIR WILLIAM & CO/IL	565,300565,300	$10M	2.76%	TRIM -3%
9	First Eagle Investment Management, LLC	404,075404,075	$7M	1.97%	ADD 13%
10	Granahan Investment Management, LLC	387,470387,470	$7M	1.89%	ADD 45%
11	MILLENNIUM MANAGEMENT LLC	380,972380,972	$7M	1.86%	ADD 149%
12	AMERIPRISE FINANCIAL INC	351,790351,790	$6M	1.72%	—
13	GEODE CAPITAL MANAGEMENT, LLC	335,835335,835	$6M	1.64%	ADD 2%
14	STATE STREET CORP	285,850285,850	$5M	1.39%	—
15	SILVERCREST ASSET MANAGEMENT GROUP LLC	269,681269,681	$5M	1.32%	ADD 50%
16	JB CAPITAL PARTNERS LP	250,512250,512	$4M	1.22%	—
17	Congruence Capital, LLC	234,475234,475	$4M	1.14%	ADD 13%
18	Boston Partners	232,637232,637	$4M	1.14%	ADD 4%
19	BRIDGEWAY CAPITAL MANAGEMENT, LLC	222,703222,703	$4M	1.09%	—
20	AMERICAN CENTURY COMPANIES INC	221,673221,673	$4M	1.08%	TRIM -21%
21	Roubaix Capital, LLC	210,657210,657	$4M	1.03%	ADD 44%
22	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	185,261185,261	$3M	0.90%	TRIM -36%
23	BANK OF AMERICA CORP /DE/	183,599183,599	$3M	0.90%	TRIM -16%
24	Wealthspire Advisors, LLC	141,607141,607	$3M	0.69%	ADD 48%
25	Panoramic Capital, LLC	140,000140,000	$3M	0.68%	NEW
26	Russell Investments Group, Ltd.	138,215138,215	$2M	0.67%	TRIM -27%
27	Empowered Funds, LLC	123,293123,293	$2M	0.60%	NEW
28	SEI INVESTMENTS CO	122,878122,878	$2M	0.60%	ADD 47%
29	CenterBook Partners LP	120,303120,303	$2M	0.59%	TRIM -53%
30	UBS Group AG	116,571116,571	$2M	0.57%	TRIM -20%
31	Squarepoint Ops LLC	110,569110,569	$2M	0.54%	NEW
32	KENNEDY CAPITAL MANAGEMENT LLC	106,791106,791	$2M	0.52%	ADD 2%
33	NORTHERN TRUST CORP	100,384100,384	$2M	0.49%	ADD 6%
34	FORMULA GROWTH LTD	100,000100,000	$2M	0.49%	ADD 150%
35	OSAIC HOLDINGS, INC.	99,10499,104	$2M	0.48%	TRIM -17%
36	VANGUARD FIDUCIARY TRUST CO	91,04491,044	$2M	0.44%	NEW
37	ANCHOR CAPITAL ADVISORS LLC	81,44281,442	$1M	0.40%	TRIM -25%
38	VANGUARD PORTFOLIO MANAGEMENT LLC	75,90375,903	$1M	0.37%	NEW
39	TOCQUEVILLE ASSET MANAGEMENT L.P.	71,10071,100	$1M	0.35%	—
40	GOLDMAN SACHS GROUP INC	64,90864,908	$1M	0.32%	TRIM -28%
41	RENAISSANCE TECHNOLOGIES LLC	62,90062,900	$1M	0.31%	TRIM -12%
42	CITADEL ADVISORS LLC	56,78656,786	$1M	0.28%	TRIM -45%
43	Integrated Quantitative Investments LLC	50,65950,659	$909,329	0.25%	NEW
44	Nuveen, LLC	47,41847,418	$851,154	0.23%	TRIM -46%
45	SummerHaven Investment Management, LLC	45,32545,325	$813,584	0.22%	TRIM -12%
46	HighTower Advisors, LLC	44,58744,587	$800,337	0.22%	NEW
47	JOURNEY STRATEGIC WEALTH LLC	44,20644,206	$793,498	0.22%	ADD 51%
48	XTX Topco Ltd	41,47841,478	$744,530	0.20%	ADD 94%
49	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	40,09840,098	$719,759	0.20%	TRIM -8%
50	Numerai GP LLC	39,75539,755	$713,602	0.19%	NEW
51	SHEETS SMITH WEALTH MANAGEMENT	38,97538,975	$699,601	0.19%	—
52	Bank of New York Mellon Corp	38,85138,851	$697,375	0.19%	TRIM -8%
53	PANAGORA ASSET MANAGEMENT INC	36,76536,765	$659,932	0.18%	TRIM -33%
54	Legato Capital Management LLC	35,69835,698	$640,779	0.17%	NEW
55	TWO SIGMA INVESTMENTS, LP	34,70834,708	$623,009	0.17%	NEW
56	STATE OF WISCONSIN INVESTMENT BOARD	32,26232,262	$579,103	0.16%	TRIM -21%
57	Ancora Advisors LLC	32,13332,133	$576,787	0.16%	TRIM -75%
58	Janney Montgomery Scott LLC	31,30531,305	$562,000	0.15%	TRIM -8%
59	North Star Investment Management Corp.	30,00030,000	$538,500	0.15%	NEW
60	Invesco Ltd.	27,02827,028	$485,153	0.13%	TRIM -3%
61	O'SHAUGHNESSY ASSET MANAGEMENT, LLC	26,37026,370	$473,342	0.13%	TRIM -3%
62	MORGAN STANLEY	23,83423,834	$427,821	0.12%	TRIM -71%
63	LPL Financial LLC	21,77121,771	$390,789	0.11%	—
64	AQR CAPITAL MANAGEMENT LLC	20,38320,383	$365,875	0.10%	TRIM -36%
65	ENVESTNET ASSET MANAGEMENT INC	20,30120,301	$364,403	0.10%	TRIM -13%
66	NEEDHAM INVESTMENT MANAGEMENT LLC	20,00020,000	$359,000	0.10%	NEW
67	BARCLAYS PLC	19,02819,028	$341,552	0.09%	TRIM -49%
68	SummitTX Capital, L.P.	18,69618,696	$335,593	0.09%	ADD 24%
69	RHUMBLINE ADVISERS	18,20018,200	$326,682	0.09%	—
70	Gradient Investments LLC	17,10417,104	$307,017	0.08%	TRIM -18%
71	Johnson Financial Group, Inc.	16,47516,475	$295,727	0.08%	—
72	Worth Venture Partners, LLC	15,11015,110	$271,225	0.07%	ADD 10%
73	Avior Wealth Management, LLC	14,91914,919	$267,796	0.07%	—
74	FRANKLIN RESOURCES INC	13,52813,528	$242,828	0.07%	—
75	ALLIANCEBERNSTEIN L.P.	12,81012,810	$239,803	0.06%	—
76	WELLS FARGO & COMPANY/MN	12,56912,569	$225,614	0.06%	TRIM -44%
77	MIRABELLA FINANCIAL SERVICES LLP	12,43012,430	$223,119	0.06%	NEW
78	Brevan Howard Capital Management LP	12,02312,023	$215,813	0.06%	NEW
79	Heck Capital Advisors, LLC	11,49411,494	$206,318	0.06%	NEW
80	DEUTSCHE BANK AG\	10,23710,237	$183,754	0.05%	ADD 24%
81	Aquatic Capital Management LLC	8,9018,901	$159,773	0.04%	ADD 103%
82	MetLife Investment Management, LLC	7,9587,958	$142,846	0.04%	—
83	HARBOR CAPITAL ADVISORS, INC.	7,7857,785	$140,000	0.04%	NEW
84	HARBOUR INVESTMENTS, INC.	7,7007,700	$138,215	0.04%	—
85	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	6,2416,241	$112,026	0.03%	ADD 2%
86	JONES FINANCIAL COMPANIES LLLP	6,1816,181	$109,404	0.03%	ADD 111%
87	Vanguard Global Advisers, LLC	5,9365,936	$106,551	0.03%	NEW
88	NEW YORK STATE COMMON RETIREMENT FUND	5,3955,395	$96,840	0.03%	—
89	JPMORGAN CHASE & CO	5,4815,481	$95,808	0.03%	—
90	Police & Firemen's Retirement System of New Jersey	4,6514,651	$83,485	0.02%	—
91	FMR LLC	4,2614,261	$76,487	0.02%	ADD 28%
92	State of Alaska, Department of Revenue	3,9033,903	$70,000	0.02%	—
93	ROYAL BANK OF CANADA	3,4473,447	$62,000	0.02%	TRIM -9%
94	BNP PARIBAS FINANCIAL MARKETS	2,7982,798	$50,224	0.01%	TRIM -5%
95	CITIGROUP INC	1,6371,637	$29,385	0.01%	ADD 18%
96	Ameritas Investment Partners, Inc.	1,4541,454	$26,099	0.01%	—
97	Tower Research Capital LLC (TRC)	1,2811,281	$22,994	0.01%	ADD 18%
98	Legal & General Group Plc	1,2601,260	$22,617	0.01%	—
99	Avion Wealth	1,0001,000	$17,000	0.00%	—
100	CWM, LLC	922922	$16,550	0.00%	ADD 2%

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

Allspring Global Investments Holdings, LLC

2.4M

2.1M

2.0M

$36M

DIMENSIONAL FUND ADVISORS LP

705K

773K

814K

847K

877K

926K

$17M

BlackRock, Inc.

849K

850K

913K

915K

866K

882K

$16M

Portolan Capital Management, LLC

—

513K

821K

$15M

ROYCE & ASSOCIATES LP

584K

591K

559K

567K

624K

751K

$13M

EVR Research LP

—

605K

620K

$11M

VANGUARD CAPITAL MANAGEMENT LLC

—

595K

$11M

BLAIR WILLIAM & CO/IL

198K

92K

373K

377K

584K

565K

$10M

First Eagle Investment Management, LLC

332K

352K

354K

355K

358K

404K

$7M

Granahan Investment Management, LLC

579K

478K

498K

349K

268K

387K

$7M

MILLENNIUM MANAGEMENT LLC

30K

112K

—

153K

381K

$7M

AMERIPRISE FINANCIAL INC

112K

37K

40K

394K

351K

352K

$6M

GEODE CAPITAL MANAGEMENT, LLC

277K

291K

318K

335K

329K

336K

$6M

STATE STREET CORP

250K

252K

265K

275K

285K

286K

$5M

SILVERCREST ASSET MANAGEMENT GROUP LLC

—

180K

270K

$5M

Shares reported each quarter by the largest current holders. Green = added vs the prior filing, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	123	14,361,474	70.1%	$258M
2025-Q4	122	13,849,272	67.6%	$260M
2025-Q3	104	13,286,757	64.8%	$184M
2025-Q2	113	12,673,016	61.8%	$203M
2025-Q1	117	12,437,195	60.7%	$168M
2024-Q4	115	12,463,515	60.8%	$195M
2024-Q3	116	11,690,530	57.0%	$246M
2024-Q2	97	10,758,553	52.5%	$179M
2024-Q1

Short interest has its own tab now — open SI →

Source: SEC Form 13F — every institution manager (≥ $100M in 13F securities) reporting a long US-listed position, across ~10,250 filers over 10 years of history. 13F is long-only, US-listed, filed up to 45 days after quarter-end.

Activists & large holders· Schedule 13D/G beneficial owners · MEC

Large holders — 13G, passive (top 1 by % of class)

Holder

% of class

Type

As of

Allspring Global Investments Holdings, LLC

4.2%

QII

2026-06-30

SEC →

Source: SEC Schedule 13D/13G structured XML. 13D = active intent; 13G filers report passively (Rule 13d-1(b) QII / 13d-1(c) Passive / 13d-1(d) Exempt) and are not activists. Percent and delta are the group aggregate the filing reports. Structured 13D/G coverage begins December 2024 (SEC XML mandate).

Institutional ownership· 13F filers holding MEC · 2026-Q1 methodology → sources →

123 holders

% of shares outstanding held

70.1%

Shares held (13F)

14,361,474

Reporting holders

123

Top holders

largest 100 of 123 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	Allspring Global Investments Holdings, LLC	2,000,3502.0M	$36M	9.76%	TRIM -3%
2	DIMENSIONAL FUND ADVISORS LP	926,216926,216	$17M	4.52%	ADD 6%
3	BlackRock, Inc.	881,854881,854	$16M	4.30%	—
4	Portolan Capital Management, LLC	821,136821,136	$15M	4.01%	ADD 60%
5	ROYCE & ASSOCIATES LP	751,001751,001	$13M	3.66%	ADD 20%
6	EVR Research LP	620,000620,000	$11M	3.03%	ADD 2%
7	VANGUARD CAPITAL MANAGEMENT LLC	594,938594,938	$11M	2.90%	NEW†
8	BLAIR WILLIAM & CO/IL	565,300565,300	$10M	2.76%	TRIM -3%
9	First Eagle Investment Management, LLC	404,075404,075	$7M	1.97%	ADD 13%
10	Granahan Investment Management, LLC	387,470387,470	$7M	1.89%	ADD 45%
11	MILLENNIUM MANAGEMENT LLC	380,972380,972	$7M	1.86%	ADD 149%
12	AMERIPRISE FINANCIAL INC	351,790351,790	$6M	1.72%	—
13	GEODE CAPITAL MANAGEMENT, LLC	335,835335,835	$6M	1.64%	ADD 2%
14	STATE STREET CORP	285,850285,850	$5M	1.39%	—
15	SILVERCREST ASSET MANAGEMENT GROUP LLC	269,681269,681	$5M	1.32%	ADD 50%
16	JB CAPITAL PARTNERS LP	250,512250,512	$4M	1.22%	—
17	Congruence Capital, LLC	234,475234,475	$4M	1.14%	ADD 13%
18	Boston Partners	232,637232,637	$4M	1.14%	ADD 4%
19	BRIDGEWAY CAPITAL MANAGEMENT, LLC	222,703222,703	$4M	1.09%	—
20	AMERICAN CENTURY COMPANIES INC	221,673221,673	$4M	1.08%	TRIM -21%
21	Roubaix Capital, LLC	210,657210,657	$4M	1.03%	ADD 44%
22	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	185,261185,261	$3M	0.90%	TRIM -36%
23	BANK OF AMERICA CORP /DE/	183,599183,599	$3M	0.90%	TRIM -16%
24	Wealthspire Advisors, LLC	141,607141,607	$3M	0.69%	ADD 48%
25	Panoramic Capital, LLC	140,000140,000	$3M	0.68%	NEW
26	Russell Investments Group, Ltd.	138,215138,215	$2M	0.67%	TRIM -27%
27	Empowered Funds, LLC	123,293123,293	$2M	0.60%	NEW
28	SEI INVESTMENTS CO	122,878122,878	$2M	0.60%	ADD 47%
29	CenterBook Partners LP	120,303120,303	$2M	0.59%	TRIM -53%
30	UBS Group AG	116,571116,571	$2M	0.57%	TRIM -20%
31	Squarepoint Ops LLC	110,569110,569	$2M	0.54%	NEW
32	KENNEDY CAPITAL MANAGEMENT LLC	106,791106,791	$2M	0.52%	ADD 2%
33	NORTHERN TRUST CORP	100,384100,384	$2M	0.49%	ADD 6%
34	FORMULA GROWTH LTD	100,000100,000	$2M	0.49%	ADD 150%
35	OSAIC HOLDINGS, INC.	99,10499,104	$2M	0.48%	TRIM -17%
36	VANGUARD FIDUCIARY TRUST CO	91,04491,044	$2M	0.44%	NEW
37	ANCHOR CAPITAL ADVISORS LLC	81,44281,442	$1M	0.40%	TRIM -25%
38	VANGUARD PORTFOLIO MANAGEMENT LLC	75,90375,903	$1M	0.37%	NEW
39	TOCQUEVILLE ASSET MANAGEMENT L.P.	71,10071,100	$1M	0.35%	—
40	GOLDMAN SACHS GROUP INC	64,90864,908	$1M	0.32%	TRIM -28%
41	RENAISSANCE TECHNOLOGIES LLC	62,90062,900	$1M	0.31%	TRIM -12%
42	CITADEL ADVISORS LLC	56,78656,786	$1M	0.28%	TRIM -45%
43	Integrated Quantitative Investments LLC	50,65950,659	$909,329	0.25%	NEW
44	Nuveen, LLC	47,41847,418	$851,154	0.23%	TRIM -46%
45	SummerHaven Investment Management, LLC	45,32545,325	$813,584	0.22%	TRIM -12%
46	HighTower Advisors, LLC	44,58744,587	$800,337	0.22%	NEW
47	JOURNEY STRATEGIC WEALTH LLC	44,20644,206	$793,498	0.22%	ADD 51%
48	XTX Topco Ltd	41,47841,478	$744,530	0.20%	ADD 94%
49	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	40,09840,098	$719,759	0.20%	TRIM -8%
50	Numerai GP LLC	39,75539,755	$713,602	0.19%	NEW
51	SHEETS SMITH WEALTH MANAGEMENT	38,97538,975	$699,601	0.19%	—
52	Bank of New York Mellon Corp	38,85138,851	$697,375	0.19%	TRIM -8%
53	PANAGORA ASSET MANAGEMENT INC	36,76536,765	$659,932	0.18%	TRIM -33%
54	Legato Capital Management LLC	35,69835,698	$640,779	0.17%	NEW
55	TWO SIGMA INVESTMENTS, LP	34,70834,708	$623,009	0.17%	NEW
56	STATE OF WISCONSIN INVESTMENT BOARD	32,26232,262	$579,103	0.16%	TRIM -21%
57	Ancora Advisors LLC	32,13332,133	$576,787	0.16%	TRIM -75%
58	Janney Montgomery Scott LLC	31,30531,305	$562,000	0.15%	TRIM -8%
59	North Star Investment Management Corp.	30,00030,000	$538,500	0.15%	NEW
60	Invesco Ltd.	27,02827,028	$485,153	0.13%	TRIM -3%
61	O'SHAUGHNESSY ASSET MANAGEMENT, LLC	26,37026,370	$473,342	0.13%	TRIM -3%
62	MORGAN STANLEY	23,83423,834	$427,821	0.12%	TRIM -71%
63	LPL Financial LLC	21,77121,771	$390,789	0.11%	—
64	AQR CAPITAL MANAGEMENT LLC	20,38320,383	$365,875	0.10%	TRIM -36%
65	ENVESTNET ASSET MANAGEMENT INC	20,30120,301	$364,403	0.10%	TRIM -13%
66	NEEDHAM INVESTMENT MANAGEMENT LLC	20,00020,000	$359,000	0.10%	NEW
67	BARCLAYS PLC	19,02819,028	$341,552	0.09%	TRIM -49%
68	SummitTX Capital, L.P.	18,69618,696	$335,593	0.09%	ADD 24%
69	RHUMBLINE ADVISERS	18,20018,200	$326,682	0.09%	—
70	Gradient Investments LLC	17,10417,104	$307,017	0.08%	TRIM -18%
71	Johnson Financial Group, Inc.	16,47516,475	$295,727	0.08%	—
72	Worth Venture Partners, LLC	15,11015,110	$271,225	0.07%	ADD 10%
73	Avior Wealth Management, LLC	14,91914,919	$267,796	0.07%	—
74	FRANKLIN RESOURCES INC	13,52813,528	$242,828	0.07%	—
75	ALLIANCEBERNSTEIN L.P.	12,81012,810	$239,803	0.06%	—
76	WELLS FARGO & COMPANY/MN	12,56912,569	$225,614	0.06%	TRIM -44%
77	MIRABELLA FINANCIAL SERVICES LLP	12,43012,430	$223,119	0.06%	NEW
78	Brevan Howard Capital Management LP	12,02312,023	$215,813	0.06%	NEW
79	Heck Capital Advisors, LLC	11,49411,494	$206,318	0.06%	NEW
80	DEUTSCHE BANK AG\	10,23710,237	$183,754	0.05%	ADD 24%
81	Aquatic Capital Management LLC	8,9018,901	$159,773	0.04%	ADD 103%
82	MetLife Investment Management, LLC	7,9587,958	$142,846	0.04%	—
83	HARBOR CAPITAL ADVISORS, INC.	7,7857,785	$140,000	0.04%	NEW
84	HARBOUR INVESTMENTS, INC.	7,7007,700	$138,215	0.04%	—
85	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	6,2416,241	$112,026	0.03%	ADD 2%
86	JONES FINANCIAL COMPANIES LLLP	6,1816,181	$109,404	0.03%	ADD 111%
87	Vanguard Global Advisers, LLC	5,9365,936	$106,551	0.03%	NEW
88	NEW YORK STATE COMMON RETIREMENT FUND	5,3955,395	$96,840	0.03%	—
89	JPMORGAN CHASE & CO	5,4815,481	$95,808	0.03%	—
90	Police & Firemen's Retirement System of New Jersey	4,6514,651	$83,485	0.02%	—
91	FMR LLC	4,2614,261	$76,487	0.02%	ADD 28%
92	State of Alaska, Department of Revenue	3,9033,903	$70,000	0.02%	—
93	ROYAL BANK OF CANADA	3,4473,447	$62,000	0.02%	TRIM -9%
94	BNP PARIBAS FINANCIAL MARKETS	2,7982,798	$50,224	0.01%	TRIM -5%
95	CITIGROUP INC	1,6371,637	$29,385	0.01%	ADD 18%
96	Ameritas Investment Partners, Inc.	1,4541,454	$26,099	0.01%	—
97	Tower Research Capital LLC (TRC)	1,2811,281	$22,994	0.01%	ADD 18%
98	Legal & General Group Plc	1,2601,260	$22,617	0.01%	—
99	Avion Wealth	1,0001,000	$17,000	0.00%	—
100	CWM, LLC	922922	$16,550	0.00%	ADD 2%

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

Allspring Global Investments Holdings, LLC

2.4M

2.1M

2.0M

$36M

DIMENSIONAL FUND ADVISORS LP

705K

773K

814K

847K

877K

926K

$17M

BlackRock, Inc.

849K

850K

913K

915K

866K

882K

$16M

Portolan Capital Management, LLC

—

513K

821K

$15M

ROYCE & ASSOCIATES LP

584K

591K

559K

567K

624K

751K

$13M

EVR Research LP

—

605K

620K

$11M

VANGUARD CAPITAL MANAGEMENT LLC

—

595K

$11M

BLAIR WILLIAM & CO/IL

198K

92K

373K

377K

584K

565K

$10M

First Eagle Investment Management, LLC

332K

352K

354K

355K

358K

404K

$7M

Granahan Investment Management, LLC

579K

478K

498K

349K

268K

387K

$7M

MILLENNIUM MANAGEMENT LLC

30K

112K

—

153K

381K

$7M

AMERIPRISE FINANCIAL INC

112K

37K

40K

394K

351K

352K

$6M

GEODE CAPITAL MANAGEMENT, LLC

277K

291K

318K

335K

329K

336K

$6M

STATE STREET CORP

250K

252K

265K

275K

285K

286K

$5M

SILVERCREST ASSET MANAGEMENT GROUP LLC

—

180K

270K

$5M

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	123	14,361,474	70.1%	$258M
2025-Q4	122	13,849,272	67.6%	$260M
2025-Q3	104	13,286,757	64.8%	$184M
2025-Q2	113	12,673,016	61.8%	$203M
2025-Q1	117	12,437,195	60.7%	$168M
2024-Q4	115	12,463,515	60.8%	$195M
2024-Q3	116	11,690,530	57.0%	$246M
2024-Q2	97	10,758,553	52.5%	$179M
2024-Q1

Short interest has its own tab now — open SI →

Activists & large holders· Schedule 13D/G beneficial owners · MEC

Large holders — 13G, passive (top 1 by % of class)

Holder

% of class

Type

As of

Allspring Global Investments Holdings, LLC

4.2%

QII

2026-06-30

SEC →

MEC US Equity☆

Institutional ownership· 13F filers holding MEC · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · MEC

Institutional ownership· 13F filers holding MEC · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · MEC

MEC US Equity