Mariner’s MEDIROM Healthcare Technologies MRM Stock Holding History

Mariner’s Portfolio MRM Stock Details MRM Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q3	–	Sell	-19,000	Closed	-$27K	–	3686
2025 Q2	$27K	Buy	+19,000	New	+$21K	﹤0.01%	3391

Other funds holding MRM

Jane Street New York $777B AUM 61.18% 1-Year Est. Return

GAMMA Investing Foster City, California $2.69B AUM 42.78% 1-Year Est. Return

TRCT

Tower Research Capital (TRC) New York $3.85B AUM 32.11% 1-Year Est. Return

RhumbLine Advisers Boston, Massachusetts $117B AUM 29.66% 1-Year Est. Return

Mariner's MRM Position: Q3 2025 in Review

Mariner sold out of MEDIROM Healthcare Technologies (MRM) in Q3 2025, closing a stake of 19,000 shares — an estimated $27K sold.

Mariner first reported a position in MRM in Q2 2025 and held it in 1 quarter. The position peaked at $27K in Q2 2025. 4 funds tracked by Wall St. Rank hold MRM as of Q3 2025.

Mariner reported no remaining MEDIROM Healthcare Technologies position as of Q3 2025 after selling out during the quarter.
Mariner sold 19,000 MEDIROM Healthcare Technologies shares in Q3 2025, an estimated $27K.
Mariner first reported a position in MEDIROM Healthcare Technologies in Q2 2025 and held it in 1 quarter.
Mariner's MEDIROM Healthcare Technologies position peaked at $27K in Q2 2025.
4 funds tracked by Wall St. Rank held MEDIROM Healthcare Technologies as of Q3 2025.

Based on Mariner's 13F filing for Q3 2025, filed 14 Nov 2025.