MRM · Medirom Healthcare Technologies Inc. · Shareholders & Ownership
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Every disclosed holder of MRM in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns MRM
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positionsNo chart: shares outstanding cannot be set against these holders.
| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 167,809 | — |
| Insiders (Forms 3, 4, 5) | 0 | — |
| 13D/G-only blocks | 2,031,558 | — |
| Registered funds (N-PORT, not summed) | 0 | — |
% Out is unavailable: a foreign private issuer reports ordinary shares, a different unit from the listed shares.
Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of MRM
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
Kouji Eguchi
13D
CIK 1836369 · Unknown · Aug 27, 2026
Item 4 purpose: not restated by this amendment, the earlier 13D's purpose stands
|
2,031,558 | ||
| 1.1 |
Eguchi Kouji
Insider
CIK 1836369 · Aug 27, 2026
Director, Chief Executive Officer, 10% Owner, issuer-wide, not summed
|
1,845,058 | ||
| 2 |
CITADEL ADVISORS LLC
13F
CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
56,102 | ||
| 3 |
HRT FINANCIAL LP
13F
CIK 1475597 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
54,755 | ||
| 4 |
|
40,000 | ||
| 5 |
|
28,837 | ||
| 6 |
|
28,500 | ||
| 7 |
|
27,181 | ||
| 8 |
Virtu Financial LLC
13F
CIK 1533964 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
15,785 | ||
| 9 |
TWO SIGMA SECURITIES, LLC
13F
CIK 1450144 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
10,565 | ||
| 10 |
RHUMBLINE ADVISERS
13F
CIK 1115418 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,104 | ||
| 11 |
|
1,200 | ||
| 12 |
Arax Advisory Partners
13F
CIK 1586767 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
300 | ||
| 13 |
GAMMA Investing LLC
13F
CIK 2010235 · Registered investment adviser · Sep 30, 2026
|
17 |
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.