HolderBook

POLARYX THERAPEUTICS INC (PLYX)

Institutional ownership reported to the SEC as of Q2 2026, across 2 quarters.

13
Reporting holders
$6.0M
Reported value
4.5%
Of shares outstanding
0.0%
Calls
0.0%
Puts
-1
Holder change

Institutions report 2,251,203 shares against 49,845,993 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.

Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.

Holders

Download these holders as CSV

FilerValueShares Their book Held Change
VANGUARD CAPITAL MANAGEMENT LLC$4.4M1,657,8720.00%2qHELD
GEODE CAPITAL MANAGEMENT, LLC$455.1K170,9980.00%2qHELD
STATE STREET CORP$309.1K116,2080.00%2q+100.0%+$154.6K
VANGUARD FIDUCIARY TRUST CO$279.5K105,0720.00%2qHELD
HRT FINANCIAL LP$218.0K82,0940.00%newNEW
BlackRock, Inc.$109.1K41,0120.00%2qHELD
JANE STREET GROUP, LLC$83.6K31,4410.00%newNEW
NORTHERN TRUST CORP$74.4K27,9870.00%2qHELD
Allworth Financial LP$20.6K7,7270.00%newNEW
Vanguard Global Advisers, LLC$16.8K6,3180.00%2qHELD
Tower Research Capital LLC (TRC)$8.0K3,0020.00%2q+68.6%+$3.2K
UBS Group AG$3.4K1,2830.00%2q-90.5%-$32.4K
Fortitude Family Office, LLC$5031890.00%newNEW

What the insiders did

Open market purchases and sales reported on Form 4 in the last 180 days. Grants, option exercises and shares surrendered to cover tax are left out: they are compensation rather than a decision to buy or sell. Where a broker filled one order in tranches the lines are summed, because it was one decision.

Ten percent owners and entities

Usually an institution that crossed a reporting threshold, or a company taking a strategic stake, rather than an individual with a view.

DateInsiderRoleSideSharesValue
2026-05-27Yang Alex Keun MoChief Executive OfficerBought88,453$360.0K

Quarter by quarter

Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.

QuarterHoldersValue SharesNewAdded TrimmedOptions
Q2 202613$6.0M2,251,2034210.0%
Q1 202614$17.1M2,267,13611000.0%