Polaryx Therapeutics, Inc. (PLYX) Ownership
PLYX ownership summary
as of October 18, 2026- Institutions
- 4.4% of shares outstanding
- Insiders
- 69.92% of shares outstanding
- Shares outstanding
- 49.8M
- Float
- 7.2M shares available to trade
- Short interest
- 0.67% 143K shares short
- Days to cover
- 4.57 short interest down 23.3% vs prior month
- Institutions 4.40%
- Insiders 69.92%
- Other investors 25.68%
PLYX top institutional holders
18 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard Capital Management, LLC | 3.33% | 1.7M | $3.1M | −516 (−0.0%) | June 30, 2026 |
| 2 | Geode Capital Management, LLC | 0.34% | 171K | $321,476 | +325 (+0.2%) | June 30, 2026 |
| 3 | Vanguard Fiduciary Trust Co | 0.21% | 105K | $197,535 | +516 (+0.5%) | June 30, 2026 |
| 4 | HRT FINANCIAL LLC | 0.16% | 82K | $154,337 | +82,094 (0.0%) | June 30, 2026 |
| 5 | State Street Corp | 0.12% | 58K | $109,236 | — | June 30, 2026 |
| 6 | BlackRock Inc | 0.08% | 41K | $77,103 | — | June 30, 2026 |
| 7 | Jane Street Group LLC | 0.06% | 31K | $59,109 | +31,441 (0.0%) | June 30, 2026 |
| 8 | Northern Trust Corp | 0.06% | 28K | $52,616 | — | June 30, 2026 |
| 9 | Hanson Mcclain Inc | 0.02% | 7,727 | $14,527 | +7,727 (0.0%) | June 30, 2026 |
| 10 | Vanguard Global Advisers, LLC | 0.01% | 6,318 | $11,878 | — | June 30, 2026 |
| 11 | Tower Research Capital LLC | 0.01% | 3,002 | $5,644 | +1,221 (+68.6%) | June 30, 2026 |
| 12 | UBS Group AG | <0.01% | 1,283 | $2,412 | −12,196 (−90.5%) | June 30, 2026 |
| 13 | Fortitude Family Office LLC | <0.01% | 189 | $355 | +189 (0.0%) | June 30, 2026 |
| 14 | The Goldman Sachs Group Inc | 0.00% | — | — | −13,483 (−100.0%) | June 30, 2026 |
| 15 | Millennium Management LLC | 0.00% | — | — | −127,525 (−100.0%) | June 30, 2026 |
| 16 | Morgan Stanley - Brokerage Accounts | 0.00% | — | — | −5,543 (−100.0%) | June 30, 2026 |
| 17 | Squarepoint Ops LLC | 0.00% | — | — | −12,406 (−100.0%) | June 30, 2026 |
| 18 | Bank of America Corp | 0.00% | — | — | −25,881 (−100.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 18, 7 holders added 124K shares and 7 cut 198K.
PLYX top mutual fund and ETF holders
8 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.95% | 1.5M | $2.8M | — | August 31, 2026 |
| 2 | Fidelity Extended Market Index | 0.13% | 65K | $122,426 | −350 (−0.5%) | August 31, 2026 |
| 3 | Fidelity Total Market Index | 0.05% | 26K | $49,726 | — | August 31, 2026 |
| 4 | Vanguard Balanced Index Inv | 0.05% | 26K | $48,822 | — | August 31, 2026 |
| 5 | Vanguard MStar Inst Ttl StkMktIdxInstlPl | 0.04% | 22K | $41,089 | — | August 31, 2026 |
| 6 | Fidelity Series Total Market Index | 0.04% | 20K | $36,857 | — | August 31, 2026 |
| 7 | Fidelity Nasdaq Composite Index | 0.04% | 19K | $35,799 | −9,606 (−33.5%) | August 31, 2026 |
| 8 | Vanguard U.S. Eq Idx £ Acc | 0.01% | 6,318 | $11,878 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
PLYX insider transactions
latest 1| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-18 | G. Michael Landis | Buy | $2.79 | 2,867 | $7,999 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
Who owns PLYX
Institutional investors own 4.4% of Polaryx Therapeutics's shares and insiders 69.92%. The largest holder is Vanguard Capital Management, LLC with 3.33% of the shares (1.7M), as of June 30, 2026. Among the top 18 institutions, 7 added shares and 7 reduced their stake in the latest filings. Short interest is 0.67% of the float, or 4.57 days of average trading volume. The share count fell 75.0% since 2024.
Related: PLYX analyst forecast, PLYX key metrics. See the PLYX stock overview for the latest quote and news.
PLYX ownership FAQ
Who owns the most Polaryx Therapeutics stock?
The largest shareholders of Polaryx Therapeutics are Vanguard Capital Management, LLC (3.33%), Geode Capital Management, LLC (0.34%), Vanguard Fiduciary Trust Co (0.21%), HRT FINANCIAL LLC (0.16%), State Street Corp (0.12%).
What percentage of Polaryx Therapeutics is owned by institutions?
Institutions hold 4.4% of Polaryx Therapeutics's shares outstanding; insiders hold 69.92%.
Which funds own Polaryx Therapeutics?
The largest fund holders of Polaryx Therapeutics are Vanguard MStar Total Stk Mkt Idx Invest (2.95%), Fidelity Extended Market Index (0.13%), Fidelity Total Market Index (0.05%), Vanguard Balanced Index Inv (0.05%), Vanguard MStar Inst Ttl StkMktIdxInstlPl (0.04%).
What is Polaryx Therapeutics's short interest?
143K shares of Polaryx Therapeutics were sold short, 0.67% of the float; at the average daily volume it would take 4.57 days to cover.
Are insiders buying or selling Polaryx Therapeutics?
Of the latest 1 reported insider transactions in Polaryx Therapeutics (since February 18, 2026), 1 were purchases and 0 were sales.
How many shares of Polaryx Therapeutics are outstanding?
Polaryx Therapeutics has 49.8M shares outstanding, of which 7.2M are in the public float.