Aquamarine

Superinvestor

Aquamarine Zurich AG

SEC CIK: 0001953324
Manager: Guy Spier
Style: Value
Latest filing: Jul 10, 2026

SEC filings (opens in a new tab)

Predecessor filersAquamarine Capital Management, LLC

CNR holding history

Core Natural Resources, Inc. in every 13F filed by Aquamarine, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

CNR overview All 13F holders of CNR Full Q2 2026 holdings

Shares (Q4 2025): 0; Sold out in Q4 2025
Value: $0
% of portfolio: 0.0%
Quarters held: 3; Since Q1 2025

Holdings of CNR by Aquamarine, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q4 2025	0	$0	0.0%	−10,740−100.0%	Sold out	Holders
Q3 2025	10,740	$897.0K	0.3%	00.0%	Unchanged	Holders
Q2 2025	10,740	$749.0K	0.2%	00.0%	Unchanged	Holders
Q1 2025	10,740	$828.0K	0.3%	+10,740	New	Holders