MEDIROM Healthcare Technologies
MRM
3 hedge funds and large institutions have $35.7K invested in MEDIROM Healthcare Technologies in 2025 Q4 according to their latest regulatory filings, with 1 funds opening new positions, 2 increasing their positions, reducing their positions, and 2 closing their positions.
1.85% less ownership
Funds ownership: 2.08% → 0.23% (-1.8%)
25% less funds holding
Funds holding: 4 → 3 (-1)
50% less first-time investments, than exits
New positions opened: 1 | Existing positions closed: 2
90% less capital invested
Capital invested by funds: $348K → $35.7K (-$313K)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
GI
GAMMA Investing
Foster City,
California
|
+$12.7K |
| 2 |
UBS Group
Zurich,
Switzerland
|
+$7.75K |
| 3 |
RhumbLine Advisers
Boston,
Massachusetts
|
+$6.32K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Jane Street
New York
|
-$329K |
| 2 |
TRCT
Tower Research Capital (TRC)
New York
|
-$7.16K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
GI
1
GAMMA Investing
Foster City,
California
| $20.5K | +$12.7K | +5,941 | +129% |
|
|
2
RhumbLine Advisers
Boston,
Massachusetts
| $8.25K | +$6.32K | +2,946 | +225% |
|
|
3
UBS Group
Zurich,
Switzerland
| $7.02K | +$7.75K | +3,616 | New |
|
|
4
Jane Street
New York
| – | -$329K | -155,071 | Closed |
|
|
TRCT
5
Tower Research Capital (TRC)
New York
| – | -$7.16K | -3,377 | Closed |
|
MRM Hedge Fund Activity: Q4 2025 in Review
3 of the 8,224 institutional investors tracked by Wall St. Rank reported a position in MEDIROM Healthcare Technologies (MRM) for Q4 2025, worth a combined $35.7K — down 90% from $348K a quarter earlier.
Sellers outnumbered buyers: 2 funds closed out of MRM and 1 opened new positions — a net loss of 1 holder — while 0 trimmed existing stakes and 2 added.
The largest buyer was GAMMA Investing, adding an estimated $12.7K. The largest seller was Jane Street, exiting entirely with an estimated $329K sold.
- 3 institutional investors held MEDIROM Healthcare Technologies (MRM) as of Q4 2025, down from 4 in Q3 2025.
- Funds reported $35.7K of MEDIROM Healthcare Technologies stock for Q4 2025, down 90% quarter-over-quarter.
- 1 fund opened new MEDIROM Healthcare Technologies positions in Q4 2025 and 2 closed out, a net change of -1 holder.
- The largest MEDIROM Healthcare Technologies buyer in Q4 2025 was GAMMA Investing, an estimated $12.7K added.
- The largest MEDIROM Healthcare Technologies seller in Q4 2025 was Jane Street, an estimated $329K sold.
Based on aggregated 13F filings for Q4 2025.