Aquamarine (Guy Spier)
Aquamarine (Guy Spier) (Aquamarine Zurich AG) reported 7 positions worth $144.1K as of June 30, 2026 (13F filed July 10, 2026). Largest holding: BRK-B (33.9%).
Related managers
Five closest superinvestors by Jaccard overlap of tickers held in the latest quarter (computed nightly).
| Manager | Overlap | Shared holdings |
|---|---|---|
| Valley Forge Capital (Dev Kantesaria) | 16.7% | MCO, MA |
| Akre Capital Management | 13.0% | MCO, BRK-B, MA |
| Fairholme Capital (Bruce Berkowitz) | 11.1% | BRK-B, BRK-A |
| Punch Card Management (Norbert Lou) | 9.1% | BRK-A |
| Chou Associates (Francis Chou) | 8.6% | MCO, BRK-B, BRK-A |
Read the 2026-Q2 quarterly report · 13F Filing Calendar
Frequently Asked Questions
What stocks does Aquamarine (Guy Spier) hold as of Q2 2026?
Aquamarine (Guy Spier) reported 7 positions worth $144.1K in its Q2 2026 13F filing. Largest positions: BRK-B (33.9%), BRK-A (15.6%), AXP (15.3%), MA (14.3%) and MCO (8.5%).
What did Aquamarine (Guy Spier) buy in Q2 2026?
No previous quarter is available yet; the comparison appears with the next filing.
What did Aquamarine (Guy Spier) sell in Q2 2026?
No previous quarter is available yet.
13F data shows quarter-end positions, is delayed by up to 45 days and covers only long positions in US-listed securities; short positions, most derivatives and non-US assets are not reported.