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MWH · SOLV Energy, Inc. · Holdings

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$23.25 +0.32 (+1.40%) At close · Oct 21
Russell 1000 member Rebalance outlook locked
Market Cap
$4.64B
Shares
202.39M
Volume · Oct 21 2.52M Avg daily vol (3M) 1.64M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP → See every holder of MWH: 13F, 13D and 13G, insiders and funds →
Institutional holdings are being reconciled with SEC filings. Holder totals and changes may be incomplete until reconciliation finishes.
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 191
Total Value: $4,454,118,053
Total Shares: 131,398,997
Showing 1–100 of 191 holdings by value · page 1 of 2

Institutional Ownership Trend

3 quarters

Superinvestors Holding MWH

All superinvestors →
George Soros $14,868,409 Ray Dalio $2,896,293

Holder Concentration

Across 177 13F filers
Top Holder
63.9%
Mar 2026 → Jun 2026 · range 63.9% – 76.8%
of institutional value
Top 5
71.6%
Mar 2026 → Jun 2026 · range 71.6% – 81.4%
of institutional value
Top 10
77.1%
Mar 2026 → Jun 2026 · range 77.1% – 85.3%
of institutional value
HHI
4,109
Mar 2026 → Jun 2026 · range 4,109 – 5,913
Highly concentrated

Who Holds MWH

Last 3 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 177 filers, like-for-like change +8.6%; actively managed books +61.7%; index-like books +123.7%.

Holder type Share Filers Change
Registered adviser 84.1% 86 -0.3%
Exempt adviser 0.6% 4 +27.0%
Adviser 1.5% 5 +53.8%
Bank 2.3% 14 +533.2%
Broker-dealer 0.0% 1 new
Benefit plan 0.0% 3 -84.5%
Non-US 3.0% 8 +60.5%
Holding company 3.1% 8 +190.6%
Unknown 5.4% 48 +88.8%

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 2 holders with no observed 2026-03-31 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.

Conviction and Crowding

177 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders
1
0.565% of filers hold it in their top 10
Mar 31, 2026: 3
Holders above 5%
1
median weight 0.006%
Mar 31, 2026: 2
Crowding
—
the issuer has more than one class of common stock, so its count is the total across classes
Private-fund advisers
—
of shares outstanding
Institutional ownership
—
the issuer has more than one class of common stock, so its count is the total across classes
Top 10 holders
77.1%
of 13F shares, Herfindahl 0.411
Active holders
+61.7%
like-for-like share change of active filers
5% stakes on record
1
0 13D, 1 13G (0 institutional, 0 passive, 1 exempt)
How long holders have held it value-weighted 1.9 quarters
Under 1 year 100.0% 1 to 3 years 0.000% 3 years or more 0.000% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $1,723,327 (1 buying, 1 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost
$30.95
estimated per share
Mar 31, 2026: $29.63
Quarter-end price
$34.05
implied by 13F values
Estimated gain or loss
+10.0%
price against the estimated cost
Estimated at a loss
13.5%
of costed 13F value

Estimated cost covers 97.3% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies MWH's active holders also own, quarter ended Jun 30, 2026
# Company Shared holders
1 FRVO Fervo Energy Co 13
2 EROC ERock, Inc. 9
3 INIO Innio N.V. 13
4 LGN Legence Corp. 11
5 FPS Forgent Power Solutions, Inc. 16
6 XE X-Energy, Inc. 10
7 BKV BKV Corp 7
8 DPC DPC Holdings PLC 10
9 MAIR Madison Air Solutions Corp 7
10 ARXS Arxis, Inc. 6

Shareholder Targets

13F filers that own its peers but not MWH, quarter ended Jun 30, 2026

Found through its holder-overlap peers: FRVO, EROC, INIO, LGN, FPS, XE, BKV, DPC, MAIR, ARXS, OPAL, QNT, ALH, WBI, NXT, TBN, ANDG, ULS, INGM, HTO. 1,183 filers in all.

# Filer In peers
1 Advent International, L.P. Unknown, Concentrated $13,256,154,166 3 held
2 Platinum Equity Advisors, LLC/DE Registered adviser, Concentrated $4,867,901,130 1 held
3 BDT CAPITAL PARTNERS, LLC Registered adviser, Unknown $3,732,734,977 1 held
4 Blackstone Inc. Adviser, Concentrated $1,822,328,929 11 held
5 DEVON ENERGY CORP/DE Unknown, Unknown $1,592,728,379 2 held
6 T. Rowe Price Investment Management, Inc. Adviser, Diversified active $1,509,635,988 9 held
7 Capital International Investors Adviser, Diversified active $1,416,950,741 7 held
8 Capital Research Global Investors Adviser, Diversified active $1,258,677,876 7 held
9 AMAZON COM INC Unknown, Concentrated $1,208,766,365 1 held
10 COATUE MANAGEMENT LLC Registered adviser, Concentrated $1,145,207,474 1 held

Fund Ownership of MWH by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 2.18% of shares outstanding.

Fund type Of shares outstanding Shares
Index funds 0.25% 506,003
Index ETFs 1.93% 3,898,325
Active ETFs 0.16% 327,250
Active funds 3.09% 6,251,818
Unclassified 0.06% 122,527
All registered funds 5.49% 11,105,923
How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Holder type: Registered adviser 95 Exempt adviser 4 Adviser 6 Bank 14 Broker-dealer 1 Benefit plan 3 Non-US 8 Holding company 8 Unknown 52
Showing 100 of 191
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
AMERICAN SECURITIES LLC $2,823,439,654 63.39% 82,920,401
BlackRock, Inc. $94,419,522 2.12% 2,772,967
Robeco Schweiz AG $89,939,840 2.02% 2,641,405
Driehaus Capital Management LLC $80,972,738 1.82% 2,378,054
FRED ALGER MANAGEMENT, LLC $77,391,257 1.74% 2,272,871
VANGUARD CAPITAL MANAGEMENT LLC $55,079,211 1.24% 1,617,598
VANGUARD PORTFOLIO MANAGEMENT LLC $51,767,474 1.16% 1,520,337
Balyasny Asset Management L.P. $50,124,255 1.13% 1,472,078
Handelsbanken Fonder AB $44,242,152 0.99% 1,299,329
JENNISON ASSOCIATES LLC $39,796,175 0.89% 1,168,757
Ninety One UK Ltd $36,804,476 0.83% 1,532,243
TWO SIGMA INVESTMENTS, LP $35,266,334 0.79% 1,035,722
BNP PARIBAS ASSET MANAGEMENT Holding S.A. $33,925,853 0.76% 996,354
JPMORGAN CHASE & CO $31,455,831 0.71% 923,813
Aventail Capital Group, LP $29,077,338 0.65% 853,960
SCOPUS ASSET MANAGEMENT, L.P. $27,274,424 0.61% 801,011
UBS Group AG $26,135,076 0.59% 767,550
Yaupon Capital Management LP $25,537,500 0.57% 750,000
Electron Capital Partners, LLC $25,516,593 0.57% 749,386
GEODE CAPITAL MANAGEMENT, LLC $25,098,901 0.56% 737,119
FRANKLIN RESOURCES INC $24,357,429 0.55% 715,343
MILLENNIUM MANAGEMENT LLC $23,682,694 0.53% 695,527
TimesSquare Capital Management, LLC $22,277,144 0.50% 654,248
Point72 Asset Management, L.P. $20,105,707 0.45% 590,476
Wealth High Governance Asset Management Ltda. $19,719,989 0.44% 579,148
DEUTSCHE BANK AG\ $19,653,079 0.44% 577,183
FEDERATED HERMES, INC. $19,561,725 0.44% 574,500
BANK OF AMERICA CORP /DE/ $19,281,629 0.43% 566,274
RENAISSANCE TECHNOLOGIES LLC $19,091,835 0.43% 560,700
Walleye Capital LLC $18,844,359 0.42% 553,432
NEUMEIER POMA INVESTMENT COUNSEL LLC $18,320,262 0.41% 538,040
FMR LLC $17,999,681 0.40% 528,625
CUSHING ASSET MANAGEMENT, LP dba NXG INVESTMENT MANAGEMENT $17,706,000 0.40% 520,000
LMR Partners LLP $17,569,493 0.39% 515,991
BNP PARIBAS ARBITRAGE, SA $17,091,738 0.38% 501,960
Ghisallo Capital Management LLC $17,025,000 0.38% 500,000
Pictet Asset Management Holding SA $16,932,486 0.38% 497,283
Hood River Capital Management LLC $15,906,661 0.36% 467,156
SOROS FUND MANAGEMENT LLC $14,868,409 0.33% 436,664
STATE STREET CORP $14,773,443 0.33% 433,875
BW Gestao de Investimentos Ltda. $14,273,794 0.32% 419,201
GOLDMAN SACHS GROUP INC $14,119,410 0.32% 414,667
DISCOVERY CAPITAL MANAGEMENT, LLC / CT $14,018,385 0.31% 411,700
Burkehill Global Management, LP $13,620,000 0.31% 400,000
Covalis Capital LLP $13,620,000 0.31% 400,000
SEVEN GRAND MANAGERS, LLC $13,620,000 0.31% 400,000
LOS ANGELES CAPITAL MANAGEMENT LLC $12,782,676 0.29% 375,409
Cinctive Capital Management LP $12,554,132 0.28% 368,697
Alyeska Investment Group, L.P. $11,462,966 0.26% 336,651
BROWN ADVISORY INC $10,119,523 0.23% 297,196
RAYMOND JAMES FINANCIAL INC $9,911,919 0.22% 291,099
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND $9,704,250 0.22% 285,000
Invesco Ltd. $9,291,391 0.21% 272,875
COHEN & STEERS, INC. $9,228,162 0.21% 271,018
Hill City Capital, LP $8,512,500 0.19% 250,000
D. E. Shaw & Co., Inc. $8,291,345 0.19% 243,505
VANGUARD FIDUCIARY TRUST CO $7,878,250 0.18% 231,373
CHARLES SCHWAB INVESTMENT MANAGEMENT INC $7,591,651 0.17% 222,956
Wealth High Governance Capital Ltda $7,520,010 0.17% 220,852
ExodusPoint Capital Management, LP $7,273,658 0.16% 213,617
CITADEL ADVISORS LLC $6,967,004 0.16% 204,611
Ninety One North America, Inc. $6,817,044 0.15% 283,807
Centiva Capital, LP $6,656,877 0.15% 195,503
Universal- Beteiligungs- und Servicegesellschaft mbH $6,557,519 0.15% 192,585
CenterBook Partners LP $6,428,299 0.14% 188,790
Longaeva Partners L.P. $5,665,579 0.13% 166,390
NORTHERN TRUST CORP $5,607,864 0.13% 164,695
Asset Management One Co., Ltd. $5,155,714 0.12% 151,416
SEI INVESTMENTS CO $4,956,488 0.11% 145,565
WELLINGTON MANAGEMENT GROUP LLP $4,852,226 0.11% 142,503
NORGES BANK $4,424,014 0.10% 129,927
MARSHALL WACE, LLP $4,107,723 0.09% 120,638
XTX Topco Ltd $4,069,111 0.09% 119,504
Squarepoint Ops LLC $4,036,797 0.09% 118,555
TUDOR INVESTMENT CORP ET AL $3,875,707 0.09% 113,824
AMERIPRISE FINANCIAL INC $3,734,671 0.08% 109,682
Bank of New York Mellon Corp $3,359,370 0.08% 98,660
SCHRODER INVESTMENT MANAGEMENT GROUP $3,232,604 0.07% 94,937
Zurcher Kantonalbank (Zurich Cantonalbank) $3,060,618 0.07% 89,886
Hel Ved Capital Management Ltd $2,962,350 0.07% 87,000
Bridgewater Associates, LP $2,896,293 0.07% 85,060
Diameter Capital Partners LP $2,724,000 0.06% 80,000
MYDA Advisors LLC $2,724,000 0.06% 80,000
REAVES W H & CO INC $2,553,750 0.06% 75,000
Vennlight Capital Management, LP $2,395,145 0.05% 70,342
Potrero Capital Research LLC $2,245,291 0.05% 65,941
NEUBERGER BERMAN GROUP LLC $2,160,574 0.05% 63,453
ALPS ADVISORS INC $2,066,835 0.05% 60,700
Qube Research & Technologies Ltd $1,861,649 0.04% 54,674
BENJAMIN EDWARDS INC $1,798,384 0.04% 52,816
ENVESTNET ASSET MANAGEMENT INC $1,687,926 0.04% 49,572
Tidal Investments LLC $1,675,464 0.04% 49,206
Swiss National Bank $1,617,375 0.04% 47,500
Nuveen, LLC $1,591,905 0.04% 46,752
Defiance ETFs, LLC $1,523,431 0.03% 44,741
MORGAN STANLEY $1,265,363 0.03% 37,162
RHUMBLINE ADVISERS $1,174,622 0.03% 34,497
Green Alpha Advisors, LLC $1,092,093 0.02% 45,466
Freestone Grove Partners LP $1,081,836 0.02% 31,772
ESSEX INVESTMENT MANAGEMENT CO LLC $1,030,313 0.02% 42,894

Showing the top 100 of 191 holders. Create a free account to see every holder, past quarters, search, filters and CSV export.

Key facts CIK 2065636 CUSIP 78475V103 13F (30d) 23 filings 23 filers Visit website Investor relations