Cosmos Health Inc. (COSM) Ownership
COSM ownership summary
as of October 18, 2026- Institutions
- 3.7% of shares outstanding
- Insiders
- 21.68% of shares outstanding
- Shares outstanding
- 100.6M
- Float
- 78.8M shares available to trade
- Short interest
- 2.99% 2.6M shares short
- Days to cover
- 0.63 short interest down 15.3% vs prior month
- Institutions 3.68%
- Insiders 21.68%
- Other investors 74.64%
COSM top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | UBS Group AG | 0.59% | 594K | $196,945 | +581,728 (+4,568.3%) | June 30, 2026 |
| 2 | Vanguard Fiduciary Trust Co | 0.33% | 334K | $110,602 | +238,107 (+248.7%) | June 30, 2026 |
| 3 | Jane Street Group LLC | 0.29% | 289K | $95,841 | +289,287 (0.0%) | June 30, 2026 |
| 4 | Geode Capital Management, LLC | 0.28% | 282K | $93,458 | −36,017 (−11.3%) | June 30, 2026 |
| 5 | BlackRock Inc | 0.27% | 268K | $88,721 | — | June 30, 2026 |
| 6 | Vanguard Capital Management, LLC | 0.17% | 174K | $57,635 | +33,959 (+24.3%) | June 30, 2026 |
| 7 | Northern Trust Corp | 0.05% | 54K | $17,853 | +33,333 (+162.2%) | June 30, 2026 |
| 8 | State Street Corp | 0.04% | 45K | $14,989 | — | June 30, 2026 |
| 9 | Sassicaia Capital Advisers LLC | 0.04% | 36K | $11,927 | +36,000 (0.0%) | June 30, 2026 |
| 10 | KESTRA PRIVATE WEALTH SERVICES, LLC | 0.01% | 13K | $4,307 | +13,000 (0.0%) | June 30, 2026 |
| 11 | Park Capital Management, LLC / WI | 0.01% | 12K | $3,976 | +12,000 (0.0%) | September 30, 2026 |
| 12 | SIMPLEX TRADING, LLC | 0.01% | 7,138 | $2,365 | +3,335 (+87.7%) | June 30, 2026 |
| 13 | NATIONAL BANK OF CANADA /FI/ | 0.01% | 6,357 | $2,106 | — | June 30, 2026 |
| 14 | Group One Trading, LLC | <0.01% | 1,700 | $563 | −673 (−28.4%) | June 30, 2026 |
| 15 | Hanson Mcclain Inc | <0.01% | 1,241 | $411 | — | June 30, 2026 |
| 16 | Tower Research Capital LLC | <0.01% | 753 | $249 | −2 (−0.3%) | June 30, 2026 |
| 17 | SBI Securities Co Ltd | <0.01% | 299 | $99 | +187 (+167.0%) | June 30, 2026 |
| 18 | Citigroup Inc | 0.00% | 43 | $14 | −947 (−95.7%) | June 30, 2026 |
| 19 | Wells Fargo & Co | 0.00% | 40 | $13 | — | June 30, 2026 |
| 20 | Valley National Advisers Inc | 0.00% | 5 | $2 | +5 (0.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 11 holders added 1.2M shares and 4 cut 38K.
COSM top mutual fund and ETF holders
3 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Fidelity Extended Market Index | 0.27% | 275K | $91,085 | +58,603 (+27.1%) | August 31, 2026 |
| 2 | Fidelity Series Total Market Index | 0.03% | 29K | $9,455 | — | August 31, 2026 |
| 3 | Fidelity Total Market Index | 0.02% | 22K | $7,177 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
COSM insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-12 | Grigorios Siokas | Buy | $0.37 | 388,532 | $143,757 |
| 2026-02-11 | Grigorios Siokas | Buy | $0.41 | 291,262 | $119,417 |
| 2026-01-23 | Grigorios Siokas | Buy | $0.50 | 90,325 | $45,162 |
| 2026-01-20 | Grigorios Siokas | Buy | $0.50 | 353,321 | $176,660 |
| 2026-01-14 | Grigorios Siokas | Buy | $0.45 | 493,495 | $222,073 |
| 2026-01-12 | Grigorios Siokas | Buy | $0.50 | 113,185 | $56,592 |
| 2026-01-08 | Grigorios Siokas | Buy | $0.52 | 156,190 | $81,219 |
| 2026-01-07 | Grigorios Siokas | Buy | $0.52 | 124,880 | $64,938 |
| 2026-01-06 | Grigorios Siokas | Buy | $0.54 | 133,953 | $72,335 |
| 2025-12-19 | Grigorios Siokas | Buy | $0.49 | 88,314 | $43,274 |
| 2025-12-15 | Grigorios Siokas | Buy | $0.42 | 168,472 | $70,758 |
| 2025-11-28 | Grigorios Siokas | Buy | $0.64 | 76,360 | $48,870 |
| 2025-11-25 | Grigorios Siokas | Buy | $0.63 | 55,732 | $35,111 |
| 2025-11-21 | Grigorios Siokas | Buy | $0.68 | 56,080 | $38,134 |
| 2025-11-20 | Grigorios Siokas | Buy | $0.62 | 51,315 | $31,815 |
| 2025-11-19 | Grigorios Siokas | Buy | $0.65 | 61,614 | $40,049 |
| 2025-05-23 | Grigorios Siokas | Buy | $0.45 | 34,004 | $15,302 |
| 2025-05-22 | Grigorios Siokas | Buy | $0.44 | 141,825 | $62,403 |
| 2025-05-21 | Grigorios Siokas | Buy | $0.47 | 174,172 | $81,861 |
| 2025-05-20 | Grigorios Siokas | Buy | $0.45 | 147,563 | $66,403 |
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.
COSM shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns COSM
Institutional investors own 3.7% of Cosmos Health's shares and insiders 21.68%. The largest holder is UBS Group AG with 0.59% of the shares (594K), as of June 30, 2026. Among the top 20 institutions, 11 added shares and 4 reduced their stake in the latest filings. Short interest is 2.99% of the float, or 0.63 days of average trading volume. The share count rose 8,061.2% since 2014.
Related: COSM analyst forecast, COSM key metrics. See the COSM stock overview for the latest quote and news.
COSM ownership FAQ
Who owns the most Cosmos Health stock?
The largest shareholders of Cosmos Health are UBS Group AG (0.59%), Vanguard Fiduciary Trust Co (0.33%), Jane Street Group LLC (0.29%), Geode Capital Management, LLC (0.28%), BlackRock Inc (0.27%).
What percentage of Cosmos Health is owned by institutions?
Institutions hold 3.7% of Cosmos Health's shares outstanding; insiders hold 21.68%.
Which funds own Cosmos Health?
The largest fund holders of Cosmos Health are Fidelity Extended Market Index (0.27%), Fidelity Series Total Market Index (0.03%), Fidelity Total Market Index (0.02%).
What is Cosmos Health's short interest?
2.6M shares of Cosmos Health were sold short, 2.99% of the float; at the average daily volume it would take 0.63 days to cover.
Are insiders buying or selling Cosmos Health?
Of the latest 20 reported insider transactions in Cosmos Health (since May 20, 2025), 20 were purchases and 0 were sales.
How many shares of Cosmos Health are outstanding?
Cosmos Health has 100.6M shares outstanding, of which 78.8M are in the public float.