$MWH

$22.55 +$0.52 (2.36%) Close

$MWH Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 118.1M shares outstanding

Who owns MWH?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 84.3%

American Securities LLC 70.2% · BlackRock, Inc. 2.4%

Institutional ownership

100.0%

0 pts vs last qtr

Institutional holders

177

+66 vs last qtr

Net shares bought

+10.4M

by institutions in Q2 2026

New / sold out

88 / 22

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Fred Alger Management, LLC NEW +2.3M
BlackRock, Inc. +2.1M

Biggest sellers in Q2 2026

American Securities LLC −8.9M
Point72 Asset Management, L.P. −1.4M

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Solv Energy Inc in the last 12 months.

Is your stake being diluted?

There are not yet two fiscal years of reported share counts for Solv Energy Inc.

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years0% 1–3 years0% Under 1 year100%

Quarterly turnover

18.0%

of institutional shares changed hands

Top 10 managers, median time held

1 quarter

Super Investors

Investment managers reporting MWH on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
AS American Securities LLC	82.9M	70.22%	−8.9M (−9.6%)	Q1 '26	75.2%
Shares held by quarter Peak holding91.8M (Q1'26) Change over 8 quarters+82.9M Share of the company70.220% American Securities LLC's full portfolio →
B BlackRock, Inc.	2.8M	2.35%	+2.1M (+328.6%)	Q1 '26	0.0%
Shares held by quarter Peak holding2.8M (Q2'26) Change over 8 quarters+2.8M Share of the company2.350% BlackRock, Inc.'s full portfolio →

American Securities LLC

82.9M

% of company

70.22%

Change vs last qtr

−8.9M (−9.6%)

Held since

Q1 '26

BlackRock, Inc.

2.8M

% of company

2.35%

Change vs last qtr

+2.1M (+328.6%)

Held since

Q1 '26

28 more super investors behind a free account

See every manager holding Solv Energy Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting MWH on Form N-PORT; together they hold 12.5% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$39.9M	1.2M	0.99%	0.00%	June 30, 2026
VS Vanguard Small-Cap Index Fund Vanguard Index Funds	$28.7M	843.5K	0.71%	0.02%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$39.9M

% of company

0.99%

% of the fund

0.00%

As of

June 30, 2026

Vanguard Small-Cap Index Fund

Vanguard Index Funds

Position value

$28.7M

% of company

0.71%

% of the fund

0.02%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Solv Energy Inc and how much of the fund the position is.

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