Medirom Healthcare TechnologMRM
13F holders, Q3 2025 (September 30)4holders −2
1new positions
3sold out
$2.12avg. 13F price*
At the end of Q3 2025, 4 institutions reported holding Medirom Healthcare Technolog (MRM) in their 13F filings, down 2 from Q2 2025. 1 opened new positions and 3 sold out. The largest holders were Jane Street Group, LLC ($329K), GAMMA Investing LLC ($10K) and Tower Research Capital LLC (TRC) ($7K).
- Company
- Medirom Healthcare Technolog
- CUSIP
- 58510H103
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 1 | $329K |
| Exits | 3 | $101K |
All 13F filers, Q2 2025 → Q3 2025: 163,154 shares bought and 71,497 shares sold, net +91,657 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 4 holders
| Jane Street Group, LLC | 0.00% | New | 155,071 | $329K |
| GAMMA Investing LLC | 0.00% | Add +4336.5% | 4,614 | $10K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +30600.0% | 3,377 | $7K |
| Rhumbline Advisers | 0.00% | Add +18.8% | 1,307 | $3K |
"% of holder's portfolio" is MRM's weight in each manager's 13F, not the share of Medirom Healthcare Technolog the manager owns.