Jane Street
MRM

Jane Street’s MEDIROM Healthcare Technologies MRM Stock Holding History

Jane Street’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
Q4 		– Sell
-155,071
Closed -$329K – 11912
2025
Q3 		$329K Buy
+155,071
New +$260K ﹤0.01% 8720

Other funds holding MRM

GI
GAMMA Investing Foster City, California $2.69B AUM 42.78% 1-Year Est. Return
RhumbLine Advisers
RhumbLine Advisers Boston, Massachusetts $117B AUM 29.66% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

Jane Street's MRM Position: Q4 2025 in Review

Jane Street sold out of MEDIROM Healthcare Technologies (MRM) in Q4 2025, closing a stake of 155,071 shares — an estimated $329K sold.

Jane Street first reported a position in MRM in Q3 2025 and held it in 1 quarter. The position peaked at $329K in Q3 2025. 3 funds tracked by Wall St. Rank hold MRM as of Q4 2025.

  • Jane Street reported no remaining MEDIROM Healthcare Technologies position as of Q4 2025 after selling out during the quarter.
  • Jane Street sold 155,071 MEDIROM Healthcare Technologies shares in Q4 2025, an estimated $329K.
  • Jane Street first reported a position in MEDIROM Healthcare Technologies in Q3 2025 and held it in 1 quarter.
  • Jane Street's MEDIROM Healthcare Technologies position peaked at $329K in Q3 2025.
  • 3 funds tracked by Wall St. Rank held MEDIROM Healthcare Technologies as of Q4 2025.

Based on Jane Street's 13F filing for Q4 2025, filed 12 Feb 2026.