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CASTLEARK MANAGEMENT LLC

Position in RIG — Transocean Ltd.

CIK 1106832 CHICAGO, IL

Position in RIG

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$8,866,352
+$3,316,247 QoQ
Shares Held
1,813,160
+116.6% QoQ
Ownership
0.162%
of shares outstanding
% of Portfolio
0.27%
of 13F equity value
Holder Rank
#67
of 534 holders
Holding Since
Sep 2023
8 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in RIG Over Time

Shares Held

Position Value (USD)

Position in Oil & Gas Drilling

Energy · as of Jun 30, 2026

CASTLEARK MANAGEMENT LLC holds $8,866,352 across 1 Oil & Gas Drilling name. RIG ranks #1 (100.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 RIG
Transocean Ltd.
This page
1,813,160 $8,866,352

All Filings in RIG

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8 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $8,866,352 1,813,160
2026-03-31 $5,550,105 837,120
2025-12-31 $4,715,179 1,141,690
2024-09-30 $2,888,937 679,750
2024-06-30 $1,117,080 208,800
2024-03-31 $2,622,528 417,600
2023-12-31 $287,147 45,220
2023-09-30 $2,116,127 257,750