Aquamarine Zurich AG

Sector-focusedQuality / disciplined sizingConcentrated strategy

Total reported value

$144.1M

Reporting period: 2026-06-30 · Number of holdings: 7

Aquamarine Zurich AG disclosed 7 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $144.1M and a quarterly turnover rate of 6.3%.

Personality snowflake

Concentration: 79.3
Portfolio Stability: 6.29
Momentum/Contrarian: 50
Sector conviction: 100
Diversification: 14
Sizing Uniformity: 93.27

Recent moves

Add AXP
0.0%　$2.3M
Add DJCO
0.0%　$1.4M
Trim BRK-B
0.0%　$2.1M
Trim MA
0.0%　$558.0K
Trim BRK-A
0.0%　$922.0K
Add RACE
0.0%　$1.1M

Holdings Map

New buyAddUnchangedTrim

Top 10 holdings by weight

Full holdings list this quarter

#	Ticker	Issuer	Asset Subclass	Weight	Weight Change	Shares Change
1	BRK-B	Berkshire Hathaway Inc-cl B	Stock-Other	33.89%	-0.68%	—
2	BRK-A	Berkshire Hathaway Inc-cl A	Stock-Other	15.59%	-0.33%	—
3	AXP	American Express Co	Stock-Financials	15.26%	+0.73%	—
4	MA	Mastercard INC - A	Stock-Financials	14.26%	-0.51%	—
5	MCO	Moody's CORP	Stock-Financials	8.49%	-0.22%	—
6	RACE	Ferrari N.V.	Stock-Consumer Disc	7.71%	+0.31%	—
7	DJCO	Daily Journal CORP	Stock-Other	4.80%	+0.70%	—

Reported value over time

Sector allocation

Sector allocation over time

Quarterly history

Period	Holdings	Total value	Stability	Top holdings
2026-06-30	7	$144.1M	6	1BRK-B 2BRK-A 3AXP Top holdings2026-06-30 1.BRK-B 2.BRK-A 3.AXP 4.MA 5.MCO 6.RACE 7.DJCO
2026-03-31	7	$135.3M	9	1BRK-B 2BRK-A 3MA Top holdings2026-03-31 1.BRK-B 2.BRK-A 3.MA 4.AXP 5.MCO 6.RACE 7.DJCO
2025-12-31	7	$147.5M	74	1BRK-B 2AXP 3MA Top holdings2025-12-31 1.BRK-B 2.AXP 3.MA 4.BRK-A 5.MCO 6.RACE 7.DJCO
2025-09-30	14	$317.4M	14	1BRK-B 2AXP 3BAC Top holdings2025-09-30 1.BRK-B 2.AXP 3.BAC 4.MA 5.RACE 6.BRK-A 7.MU 8.MCO 9.BABA 10.DJCO
2025-06-30	14	$309.8M	0	1BRK-B 2AXP 3MA Top holdings2025-06-30 1.BRK-B 2.AXP 3.MA 4.BAC 5.RACE 6.MU 7.BRK-A 8.MCO 9.BABA 10.DJCO
2025-03-31	14	$293.7M	0	1BRK-B 2AXP 3MA Top holdings2025-03-31 1.BRK-B 2.AXP 3.MA 4.BAC 5.BRK-A 6.RACE 7.MU 8.MCO 9.BABA 10.DJCO
2024-12-31	14	$287.6M	0	1BRK-B 2AXP 3MA Top holdings2024-12-31 1.BRK-B 2.AXP 3.MA 4.BAC 5.RACE 6.BRK-A 7.MU 8.MCO 9.DJCO 10.BABA
2024-09-30	14	$285.6M	0	1BRK-B 2AXP 3MA Top holdings2024-09-30 1.BRK-B 2.AXP 3.MA 4.BAC 5.RACE 6.MU 7.BRK-A 8.MCO 9.DJCO 10.BABA
2024-06-30	14	$262.6M	0	1BRK-B 2AXP 3BAC Top holdings2024-06-30 1.BRK-B 2.AXP 3.BAC 4.MA 5.MU 6.RACE 7.BRK-A 8.MCO 9.DJCO 10.BABA
2024-03-31	12	$261.9M	0	1BRK-B 2AXP 3MA Top holdings2024-03-31 1.BRK-B 2.AXP 3.MA 4.BAC 5.RACE 6.MU 7.BRK-A 8.MCO 9.SRG 10.DJCO
2023-12-31	12	$228.7M	0	1BRK-B 2AXP 3MA Top holdings2023-12-31 1.BRK-B 2.AXP 3.MA 4.RACE 5.BAC 6.MU 7.BRK-A 8.MCO 9.SRG 10.DJCO
2023-09-30	12	$202.8M	0	1BRK-B 2AXP 3MA Top holdings2023-09-30 1.BRK-B 2.AXP 3.MA 4.RACE 5.BAC 6.BRK-A 7.MU 8.MCO 9.BABA 10.SRG
2023-06-30	12	$209.8M	0	1BRK-B 2AXP 3RACE Top holdings2023-06-30 1.BRK-B 2.AXP 3.RACE 4.MA 5.BAC 6.BRK-A 7.MU 8.MCO 9.SRG 10.BABA
2023-03-31	12	$193.4M	0	1BRK-B 2AXP 3MA Top holdings2023-03-31 1.BRK-B 2.AXP 3.MA 4.BAC 5.RACE 6.BRK-A 7.MU 8.MCO 9.BABA 10.SRG
2022-12-31	12	$185.9M	0	1BRK-B 2AXP 3BAC Top holdings2022-12-31 1.BRK-B 2.AXP 3.BAC 4.MA 5.RACE 6.BRK-A 7.MU 8.MCO 9.SRG 10.BABA
2022-09-30	12	$164.4M	0	1BRK-B 2AXP 3BAC Top holdings2022-09-30 1.BRK-B 2.AXP 3.BAC 4.MA 5.RACE 6.BRK-A 7.MU 8.MCO 9.SRG 10.BABA

Holding changes this quarter

Position changes disclosed by Aquamarine Zurich AG for the quarter ending 2026-06-30, including ticker, issuer, weight change, shares change, and action
#	Ticker	Issuer	Weight Change	Shares Change	Action
1	AXP	American Express Co	+0.7%	—	Unchanged
2	DJCO	Daily Journal CORP	+0.7%	—	Unchanged
3	RACE	Ferrari N.V.	+0.3%	—	Unchanged
4	MCO	Moody's CORP	-0.2%	—	Unchanged
5	BRK-A	Berkshire Hathaway Inc-cl A	-0.3%	—	Unchanged
6	MA	Mastercard INC - A	-0.5%	—	Unchanged
7	BRK-B	Berkshire Hathaway Inc-cl B	-0.7%	—	Unchanged

FAQ

What is Aquamarine Zurich AG and what type of investor is it?

Aquamarine Zurich AG is a investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $144.1M, spread across 7 disclosed positions.

What are Aquamarine Zurich AG's largest equity positions?

Based on the latest 13F filing, Aquamarine Zurich AG's top holdings by market value are: 1. Berkshire Hathaway Inc-cl B (BRK-B) — $48.8M (33.9%) 2. Berkshire Hathaway Inc-cl A (BRK-A) — $22.5M (15.6%) 3. American Express Co (AXP) — $22.0M (15.3%) 4. Mastercard INC - A (MA) — $20.5M (14.3%) 5. Moody's CORP (MCO) — $12.2M (8.5%)

What changes did Aquamarine Zurich AG make in its most recent portfolio filing?

No notable portfolio changes were recorded for Aquamarine Zurich AG in the most recent quarter. Holdings appear to have remained relatively stable.

What sectors does Aquamarine Zurich AG focus on?

Aquamarine Zurich AG is concentrated in the following sectors based on its current disclosed equity portfolio: • Financials: 83.1% • Consumer Discretionary: 16.9%