Security key
58510H103
Medirom Healthcare Technologies Inc. - American depositary shares, each representing one common share, no par value (MRM)
CUSIP: 58510H103
Q4 2025 13F Holders as of 31 Dec 2025
- Security type / class
- Equity / American depositary shares, each representing one common share, no par value
- Total 13F shares
- 18,424
- Total 13F value
- $35,743
- Share change
- -145,945
- SEC-reported price per share
- $1.94
- Number of holders
- 3
- Value change
- -$311,652
- Number of buys
- 3
- Number of sells
- 2
- Shares outstanding
- 8,052,010
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2025
Institutions
3
Top holders
3
MRM full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2026
Previous quarter: Q3 2025
Medirom Healthcare Technologies Inc. SEC filings
Medirom Healthcare Technologies Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 58510H103
Recent filing periods:
Ownership snapshot
Top reported holders of MRM - Medirom Healthcare Technologies Inc. - American depositary shares, each representing one common share, no par value (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Kouji Eguchi
Disclosed value leader
Kouji Eguchi
Comparable rows
5/5
Latest evidence
30 Sep 2025
13D/G
13F
Lead comparable stake: 26%
13D/G row: Kouji Eguchi
Quick read
Kouji Eguchi leads the comparable SEC ownership view at 26%.
5 of 5 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Kouji Eguchi's linked filing trail.
Comparable ownership
Top 5
Kouji Eguchi
26%
JANE STREET GROUP, LLC
1.9%
GAMMA Investing LLC
0.06%
Tower Research Capital LLC (TRC)
0.04%
RHUMBLINE ADVISERS
0.02%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-5 of 5 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Kouji Eguchi |
13D/G
|
26%
|
$2,739,004
2,075,003 shares
|
$0 | 11 Dec 2024 |
| JANE STREET GROUP, LLC |
13F
Company
|
1.9%
|
$328,750
155,071 shares
|
— | 30 Sep 2025 |
| GAMMA Investing LLC |
13F
Company
|
0.06%
|
$9,782
4,614 shares
|
— | 30 Sep 2025 |
| Tower Research Capital LLC (TRC) |
13F
Company
|
0.04%
|
$7,159
3,377 shares
|
— | 30 Sep 2025 |
| RHUMBLINE ADVISERS |
13F
Company
|
0.02%
|
$2,770
1,307 shares
|
— | 30 Sep 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
3
Shares
18,424
Rows available
3
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
4
Q4 2025 holders
3
Holder diff
-1
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend