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Vic Chen
Vic Chen

Posted on • Originally published at 13finsight.com

MSFT, Lam Research, and... Bitcoin? Inside Mariner's Unusual Q4 2025 Top Five

Mariner Investment Group's Q4 2025 filing stands out: iShares Bitcoin Trust (IBIT) in the top five alongside Microsoft, Lam Research, Alphabet, and Costco.

The Numbers

Metric Value
AUM $1.71T
Top-5 MSFT, LRCX, GOOG, COST, IBIT
Top-5 weight 36.0%
Top-10 weight 64.0%
WhaleScore 84.50
Q3 overlap 36 tickers
New positions 65

IBIT in an institutional top five is still unusual. LRCX instead of NVDA is a more specific semiconductor capex thesis. 65 new positions = near-complete rebuild.


Originally published at 13finsight.com

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