Security key
73110F100
Polaryx Therapeutics, Inc. - Common stock, par value $0.0001 per share ("Common Stock") (PLYX)
CUSIP: 73110F100
Q1 2026 13F Holders as of 31 Mar 2026
- Security type / class
- Equity / Common stock, par value $0.0001 per share ("Common Stock")
- Total 13F shares
- 2,267,136
- Total 13F value
- $17,140,152
- Share change
- +497,874
- SEC-reported price per share
- $7.56
- Number of holders
- 14
- Value change
- +$3,764,532
- Number of buys
- 11
- Shares outstanding
- 47,384,992
Holder snapshot
5 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2026
Institutions
14
Top holders
10
PLYX full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2026
Polaryx Therapeutics, Inc. SEC filings
Polaryx Therapeutics, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 73110F100
Recent filing periods:
Ownership snapshot
Top reported holders of PLYX - Polaryx Therapeutics, Inc. - Common stock, par value $0.0001 per share ("Common Stock") (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
Mstone Partners Healthcar...
Disclosed value leader
John O Andrew
Comparable rows
4/4
Latest evidence
18 Feb 2026
13D/G
3/4/5
Lead comparable stake: 48%
13D/G row: Mstone Partners Healthcare Ltd
Quick read
Mstone Partners Healthcare Ltd leads the comparable SEC ownership view at 48%.
4 of 4 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 Mstone Partners Healthcare Ltd's linked filing trail.
Comparable ownership
Top 4
Mstone Partners Healthcare Ltd
48%
John O Andrew
1%
G. Michael Landis
0.48%
Lisa Bollinger
0.32%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-4 of 4 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Mstone Partners Healthcare Ltd |
13D/G
Alex Keun Mo Yang
|
48%
|
—
22,744,796 shares
|
$0 | 29 Jan 2026 |
| John O Andrew |
3/4/5
Chief Investment Officer
|
1%
|
$1,377,679
471,808 shares
|
— | 29 Jan 2026 |
| G. Michael Landis |
3/4/5
Chief Financial Officer, Director
|
0.48%
|
$666,417
228,225 shares
|
— | 18 Feb 2026 |
| Lisa Bollinger |
3/4/5
Chief Medical Officer
|
0.32%
|
$439,045
150,358 shares
|
— | 29 Jan 2026 |
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 Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
14
Shares
2,267,136
Rows available
14
| 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 Q1 2026 vs Q1 2026 Across Filers
Q1 2026 holders
14
Q1 2026 holders
14
Holder diff
0
| Investor | Q1 2026 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q1 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend