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Equibles

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

Position in TUSK — Mammoth Energy Services, Inc.

CIK 884546 SAN FRANCISCO, CA
Back to TUSK Full portfolio

Position in TUSK

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$34,901
-$109,308 QoQ
Shares Held
10,739
-81.8% QoQ
Ownership
0.022%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#64
of 94 holders
Holding Since
Mar 2020
23 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in TUSK Over Time

Shares Held

Position Value (USD)

Position in Conglomerates

Industrials · as of Jun 30, 2026

CHARLES SCHWAB INVESTMENT MANAGEMENT INC holds $1,333,798,393 across 19 Conglomerates names. TUSK ranks #19 (0.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 MMM
3M Co
 3,448,533 $558,351,977
2 HON
Honeywell International Inc
 2,031,187 $454,782,769
3 VMI
Valmont Industries Inc
 244,104 $140,994,470
4 OTTR
Otter Tail Corp
 519,756 $46,767,644
5 GHC
Graham Holdings Co
 40,801 $46,571,077
6 SEB
Seaboard Corp /De/
 5,411 $24,156,490
7 DLX
Deluxe Corp
 858,413 $20,498,902
8 MATW
Matthews International Corp
 503,394 $13,551,366

All Filings in TUSK

Export CSV
23 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $34,901 10,739
2026-03-31 $144,209 58,861
2025-12-31 $130,746 70,674
2025-09-30 $161,843 70,674
2025-06-30 $197,887 70,674
2025-03-31 $144,174 70,674
2024-12-31 $212,022 70,674
2024-09-30 $260,164 63,610
2024-06-30 $209,857 63,981
2024-03-31 $232,890 63,981
2023-12-31 $285,355 63,981
2023-09-30 $296,871 63,981
2023-06-30 $309,028 63,981
2023-03-31 $45,318 10,739
2022-12-31 $92,892 10,739
2022-09-30 $36,619 10,739
2021-12-31 $28,834 15,843
2021-09-30 $46,103 15,843
2021-06-30 $72,719 15,843
2021-03-31 $84,284 15,843
2020-12-31 $70,501 15,843
2020-06-30 $61,572 52,180
2020-03-31 $53,678 71,667