Polaryx Therapeutics, Inc. - Common stock, par value $0.0001 per share ("Common Stock") (PLYX)

Q: What does CUSIP 73110F100 represent in this 13F holders report?

CUSIP 73110F100 is the security identifier for PLYX - Polaryx Therapeutics, Inc. - Common stock, par value $0.0001 per share ("Common Stock") used to aggregate holder disclosures.

Q: How many institutions held PLYX - Polaryx Therapeutics, Inc. - Common stock, par value $0.0001 per share ("Common Stock") in Q2 2026?

1 institutional investor reported PLYX - Polaryx Therapeutics, Inc. - Common stock, par value $0.0001 per share ("Common Stock") for Q2 2026. Use the holders table for investor-level position and value details.

CUSIP: 73110F100

Q2 2026 13F Holders as of 30 Jun 2026

Security type / class: Equity / Common stock, par value $0.0001 per share ("Common Stock")
Total 13F shares: 189
Total 13F value: $503
Share change: +189
SEC-reported price per share: $2.66
Number of holders: 1
Value change: +$503
Number of buys: 1
Shares outstanding: 47,384,992

Security key

73110F100

Report period

Q2 2026

Institutions

Top holders

PLYX full security history Ownership snapshot Full 13F holder table Previous quarter: Q1 2026 Polaryx Therapeutics, Inc. SEC filings Polaryx Therapeutics, Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 73110F100

Previous quarter: Q1 2026

Recent filing periods:

Q2 2026 Q1 2026

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

Alex Keun Mo Yang

Comparable rows

15/15

Latest evidence

27 May 2026

3/4/5 13D/G 13F Lead comparable stake: 48% 13D/G row: Mstone Partners Healthcare Ltd Showing 1-6 of 15 holder rows.

Quick read

Mstone Partners Healthcare Ltd leads the comparable SEC ownership view at 48%.

15 of 15 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 5

Mstone Partners Healthcare Ltd 48%

Alex Keun Mo Yang 55%

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 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Mstone Partners Healthcare Ltd	3/4/5 13D/G Director, 10%+ Owner · Alex Keun Mo Yang 3/4/5 13D/G	48% from 13D/G	$98,629,323 24,233,249 shares	+$360,004	27 May 2026
Alex Keun Mo Yang	3/4/5 Chief Executive Officer, Director, 10%+ Owner 3/4/5	55%	$103,569,501 25,925,091 shares	+$360,004	27 May 2026
John O Andrew	3/4/5 Chief Investment Officer 3/4/5	1%	$1,377,679 471,808 shares	—	29 Jan 2026
G. Michael Landis	3/4/5 Chief Financial Officer, Director 3/4/5	0.48%	$666,417 228,225 shares	—	18 Feb 2026
Lisa Bollinger	3/4/5 Chief Medical Officer 3/4/5	0.32%	$439,045 150,358 shares	—	29 Jan 2026
VANGUARD CAPITAL MANAGEMENT LLC	13F Company 13F	3.5%	$12,537,413 1,658,388 shares	—	31 Mar 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 Q2 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

189

Rows available

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 Q2 2026 vs Q1 2026 Across Filers

Q1 2026 holders

Q2 2026 holders

Holder diff

-13

Investor	Q1 2026 Shares	Q2 2026 Shares	Share Diff	Share Chg %	Q1 2026 value	Q2 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend