Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

Catalyst Bancorp, Inc.

CIK 0001849867CLST· quarter ending 2026-06-30
Shares outstanding
4,033,791
Held by 13F filers
1,237,594
30.7% of shares outstanding
Holders
23
+0 vs 2026-03-31 · 1 new, 1 exited
Value
$22.1M
shares +23.2% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-14, as of 2026-08-12)

ClassListedShares outstandingHeld by 13F filers% of classHoldersCUSIP
Common stockCLST · NASDAQ4,033,7911,237,59430.7%2314888L101

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine
CountCUSIPClass (as filers write it)HoldersShares heldClass shares% of classValueOptionsMapped via
14888L101COMMON STOCK231,237,5944,033,79130.7%$22.1M—13DGholders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (23 of 23 · 14888L101)

change vs 2026-03-31
#FilerShares% of classValueChange
1STILWELL VALUE LLC364,0859.03%$6.0M+81,651 (+28.9%)
2GRAHAM CAPITAL WEALTH MANAGEMENT, LLC195,9394.86%$3.2M-1,346 (-0.7%)
3VANGUARD CAPITAL MANAGEMENT LLC189,4864.70%$3.1M-654 (-0.3%)
4Knott David M Jr114,0002.83%$3.6MNEW
5BlackRock, Inc.68,7971.71%$1.1M+3,164 (+4.8%)
6ALLIANCEBERNSTEIN L.P.61,0661.51%$1.0M+29,436 (+93.1%)
7GEODE CAPITAL MANAGEMENT, LLC34,5710.86%$571K+82 (+0.2%)
8Montz Harcus Wealth Management LLC30,0000.74%$495K—
9Kestra Advisory Services, LLC25,0000.62%$413K—
10VANGUARD FIDUCIARY TRUST CO24,3510.60%$402K+135 (+0.6%)
11RENAISSANCE TECHNOLOGIES LLC23,1000.57%$381K-100 (-0.4%)
12SUSQUEHANNA INTERNATIONAL GROUP, LLP23,0780.57%$381K+12,253 (+113.2%)
13RAFFLES ASSOCIATES LP21,1100.52%$349K+10,555 (+100.0%)
14CITADEL ADVISORS LLC14,5820.36%$241K+1,581 (+12.2%)
15Summit Financial Wealth Advisors, LLC13,6000.34%$225K-4,600 (-25.3%)
16NewEdge Advisors, LLC11,5000.29%$190K-10,000 (-46.5%)
17BASSWOOD CAPITAL MANAGEMENT, L.L.C.11,2460.28%$186K—
18WITTENBERG INVESTMENT MANAGEMENT, INC.10,6690.26%$176K-3,000 (-21.9%)
19Vanguard Global Advisers, LLC1,1400.03%$19K—
20American Capital Advisory, LLC1250.00%$2K—
21Golden State Wealth Management, LLC750.00%$1K—
22UBS Group AG680.00%$1K+21 (+44.7%)
23BNP PARIBAS FINANCIAL MARKETS60.00%$99—
Exited since 2026-03-31 (1 filers; largest 1 shown)
CITIGROUP INC−1

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting personFormFiledEventShares% of class
ALCOTT MARK DAVIDSCHEDULE 13D/A2026-08-272026-08-271,0000.02%
Stilwell Activist Fund, L.P.SCHEDULE 13D/A2026-08-272026-08-27364,0859%
Stilwell Activist Investments, L.P.SCHEDULE 13D/A2026-08-272026-08-27364,0859%
STILWELL JOSEPHSCHEDULE 13D/A2026-08-272026-08-27364,0859%
STILWELL PARTNERS L PSCHEDULE 13D/A2026-08-272026-08-27364,0859%
Stilwell Value LLCSCHEDULE 13D/A2026-08-272026-08-27364,0859%
Vanguard Capital ManagementSCHEDULE 13G2026-04-292026-03-31215,4965.28%
The Vanguard GroupSCHEDULE 13G/A2026-03-262026-03-1300%
Catalyst Bancorp, Inc. Employee Stock Ownership PlanSCHEDULE 13G/A2026-02-132025-12-31416,791.8510.2%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.