Who owns AYTU BIOPHARMA, INC?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of AYTU from SEC Form 13F filings across 38 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.
As of the 2026-06-30 reporting period, 38 institutions disclosed 7.9M shares of AYTU BIOPHARMA, INC worth $15.9M — about 75.3% of shares outstanding; the largest disclosed holder is Stonepine Capital Management, LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
38
13F holders
$15.9M
value, 2026 filers
75.3%
of shares outstanding (7.9M sh)
4
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 AYTU's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | Stonepine Capital Management, LLC | 5.0M | $9.6M | 4.5% | 47.5% | +529.9% |
| 2 | Nantahala Capital Management, LLC | 1.1M | $2.3M | 0.1% | 10.3% | 0.0% |
| 3 | AWM Investment Company, Inc. | 619,574 | $1.3M | 0.1% | 5.9% | 0.0% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 261,146 | $561,464 | 0.0% | 2.5% | 0.0% |
| 5 | CROWN ADVISORS MANAGEMENT, INC. | 200,000 | $430,000 | 0.2% | 1.9% | +37.9% |
| 6 | DIADEMA PARTNERS LP | 148,546 | $319,374 | 0.0% | 1.4% | -57.9% |
| 7 | TWO SIGMA INVESTMENTS, LP | 105,326 | $226,451 | 0.0% | 1% | -13.6% |
| 8 | RENAISSANCE TECHNOLOGIES LLC | 104,823 | $225,369 | 0.0% | 1% | +11.8% |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | 93,647 | $201,371 | 0.0% | 0.9% | +1.1% |
| 10 | CITADEL ADVISORS LLC | 49,414 | $106,240 | 0.0% | 0.5% | +34.1% |
| 11 | VANGUARD FIDUCIARY TRUST CO | 47,048 | $101,153 | 0.0% | 0.4% | 0.0% |
| 12 | DIMENSIONAL FUND ADVISORS LP | 45,326 | $97,451 | 0.0% | 0.4% | +4.0% |
| 13 | Persistent Asset Partners Ltd | 37,984 | $81,666 | 0.0% | 0.4% | -59.1% |
| 14 | NORTHERN TRUST CORP | 27,925 | $60,039 | 0.0% | 0.3% | +45.7% |
| 15 | BELLEVUE ASSET MANAGEMENT, LLC | 25,013 | $53,777 | 0.0% | 0.2% | 0.0% |
| 16 | BlackRock, Inc. | 22,793 | $49,005 | 0.0% | 0.2% | 0.0% |
| 17 | XTX Topco Ltd | 21,416 | $46,044 | 0.0% | 0.2% | -0.8% |
| 18 | ACADIAN ASSET MANAGEMENT LLC | 10,237 | $22 | 0.0% | 0.1% | 0.0% |
| 19 | Daytona Street Capital LLC | 10,000 | $22,350 | 0.0% | 0.1% | 0.0% |
| 20 | UBS Group AG | 2,377 | $5,110 | 0.0% | 0% | +42.9% |
| 21 | Tower Research Capital LLC (TRC) | 2,232 | $4,799 | 0.0% | 0% | +42.7% |
| 22 | OSAIC HOLDINGS, INC. | 462 | $991 | 0.0% | 0% | 0.0% |
| 23 | ROYAL BANK OF CANADA | 378 | $1,000 | 0.0% | 0% | +950.0% |
| 24 | JPMORGAN CHASE & CONEW | 154 | $337 | 0.0% | 0% | new |
| 25 | WELLS FARGO & COMPANY/MN | 127 | $273 | 0.0% | 0% | 0.0% |
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.