Who owns CoastalSouth Bancshares, Inc.?
Institutional ownership of COSO from SEC Form 13F filings across 73 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
73
13F holders
$100.1M
value, 2026 filers
33.2%
of shares outstanding (4.0M sh)
20
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of COSO's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 584,198 | $15.7M | 0.0% | 4.9% | +18.7% |
| 2 | TWO SIGMA INVESTMENTS, LP | 408,489 | $11.0M | 0.0% | 3.4% | +308.3% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 395,093 | $10.6M | 0.0% | 3.3% | -51.4% |
| 4 | ALLIANCEBERNSTEIN L.P. | 347,546 | $8.5M | 0.0% | 2.9% | -12.6% |
| 5 | MENDON CAPITAL ADVISORS CORP | 267,232 | $7.2M | 2.5% | 2.2% | -19.0% |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 196,340 | $5.3M | 0.0% | 1.6% | +2.7% |
| 7 | ACADIAN ASSET MANAGEMENT LLC | 173,846 | $4,659 | 0.0% | 1.4% | +139.0% |
| 8 | Qube Research & Technologies LtdNEW | 127,213 | $3.4M | 0.0% | 1.1% | new |
| 9 | RAFFLES ASSOCIATES LP | 112,138 | $3.0M | 2.7% | 0.9% | -7.5% |
| 10 | MORGAN STANLEY | 108,931 | $2.9M | 0.0% | 0.9% | +289.8% |
| 11 | GOLDMAN SACHS GROUP INC | 91,528 | $2.5M | 0.0% | 0.8% | -64.5% |
| 12 | Bleakley Financial Group, LLC | 90,307 | $2.4M | 0.0% | 0.8% | +2.5% |
| 13 | CITADEL ADVISORS LLCNEW | 88,947 | $2.4M | 0.0% | 0.7% | new |
| 14 | FIRST MANHATTAN CO. LLC. | 77,638 | $2.1M | 0.0% | 0.6% | 0.0% |
| 15 | NORTHERN TRUST CORP | 65,971 | $1.8M | 0.0% | 0.5% | +2.4% |
| 16 | Point72 Asset Management, L.P.NEW | 63,549 | $1.7M | 0.0% | 0.5% | new |
| 17 | VANGUARD PORTFOLIO MANAGEMENT LLC | 59,973 | $1.6M | 0.0% | 0.5% | +12.2% |
| 18 | JPMORGAN CHASE & CO | 59,792 | $1.6M | 0.0% | 0.5% | +1502.1% |
| 19 | VANGUARD FIDUCIARY TRUST CO | 53,047 | $1.4M | 0.0% | 0.4% | -0.3% |
| 20 | JANE STREET GROUP, LLCNEW | 50,345 | $1.4M | 0.0% | 0.4% | new |
| 21 | BNP PARIBAS FINANCIAL MARKETS | 48,422 | $1.3M | 0.0% | 0.4% | +1910.9% |
| 22 | HRT FINANCIAL LPNEW | 43,819 | $1,176 | 0.0% | 0.4% | new |
| 23 | BANK OF AMERICA CORP /DE/ | 39,688 | $1.1M | 0.0% | 0.3% | +147.8% |
| 24 | Nuveen, LLC | 39,464 | $1.1M | 0.0% | 0.3% | 0.0% |
| 25 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIPNEW | 35,622 | $956,451 | 0.0% | 0.3% | new |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.