PLYX · Polaryx Therapeutics, Inc. · Shareholders & Ownership
Substantial doubt about the company's ability to continue as a going concern.
“These matters, along with the conditions described above, raise substantial doubt about the Company's ability to continue as a going concern for a period of twelve months from the date these financial statements were available to be issued.”View the 10-Q filed Aug 13, 2026
Every disclosed holder of PLYX 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 PLYX
13F quarter Jun 30, 2026| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 2,193,099 | 4.40% |
| Insiders (Forms 3, 4, 5) | 25,083,640 | 50.32% |
| 13D/G-only blocks | 0 | 0.00% |
| Remaining | 22,569,254 | 45.28% |
| Registered funds (N-PORT, not summed) | 1,788,954 | 3.59% |
Shares outstanding: 49,845,993, the issuer's latest cover-page count restated onto today's split basis.
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 PLYX
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
Yang Alex Keun Mo
Insider
CIK 2103399 · May 27, 2026
Director, Chief Executive Officer, 10% Owner, issuer-wide
|
24,233,249 | ||
| 2 |
Mstone Partners Healthcare Limited
13D
CIK 2104809 · Unknown · Jan 29, 2026
Item 4 purpose: none of the classified purposes
not summed
|
22,452,954 | ||
| 3 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
|
1,657,872 | ||
| 4 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
1,468,014 | ||
| 5 |
|
471,808 | ||
| 6 |
|
228,225 | ||
| 7 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
|
170,998 | ||
| 8 |
|
150,358 | ||
| 9 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
142,033 | ||
| 10 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
|
105,072 | ||
| 11 |
HRT FINANCIAL LP
13F
CIK 1475597 · Unknown · Jun 30, 2026
|
82,094 | ||
| 12 |
Fidelity Extended Market Index Fund
Fund
S000006021 · Registered fund · Aug 31, 2026
Fidelity Concord Street Trust, not summed
|
65,120 | ||
| 13 |
STATE STREET CORP
13F
CIK 93751 · Bank · Jun 30, 2026
|
58,104 | ||
| 14 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
|
41,012 | ||
| 15 |
JANE STREET GROUP, LLC
13F
CIK 1595888 · Unknown · Jun 30, 2026
|
31,441 | ||
| 16 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
|
27,987 | ||
| 17 |
Fidelity Total Market Index Fund
Fund
S000006026 · Registered fund · Aug 31, 2026
Fidelity Concord Street Trust, not summed
|
26,450 | ||
| 18 |
VANGUARD BALANCED INDEX FUND
Fund
S000002560 · Registered fund · Jun 30, 2026
VANGUARD VALLEY FORGE FUNDS, not summed
|
25,969 | ||
| 19 |
VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND
Fund
S000002855 · Registered fund · Jun 30, 2026
VANGUARD INSTITUTIONAL INDEX FUNDS, not summed
|
21,856 | ||
| 20 |
Fidelity Series Total Market Index Fund
Fund
S000065248 · Registered fund · Aug 31, 2026
Fidelity Concord Street Trust, not summed
|
19,605 | ||
| 21 |
Fidelity Nasdaq Composite Index Fund
Fund
S000055366 · Registered fund · Aug 31, 2026
Fidelity Concord Street Trust, not summed
|
19,042 | ||
| 22 |
Allworth Financial LP
13F
CIK 1555170 · Unknown · Jun 30, 2026
|
7,727 | ||
| 23 |
Vanguard Global Advisers, LLC
13F
CIK 1811242 · Registered investment adviser · Jun 30, 2026
|
6,318 | ||
| 24 |
Tower Research Capital LLC (TRC)
13F
CIK 1533421 · Unknown · Jun 30, 2026
|
3,002 | ||
| 25 |
UBS Group AG
13F
CIK 1610520 · Bank · Jun 30, 2026
|
1,283 | ||
| 26 |
Total Stock Market Index Trust
Fund
S000008325 · Registered fund · Jun 30, 2026
John Hancock Variable Insurance Trust, not summed
|
865 | ||
| 27 |
Fortitude Family Office, LLC
13F
CIK 1950506 · Registered investment adviser · Jun 30, 2026
|
189 |
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.