Who owns Aytu BioPharma (AYTU)
Which tracked institutional funds hold AYTU, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See AYTU company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-08-14). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on AYTU is one-sided between 2026-Q1 and 2026-Q2: 1 added or opened and 4 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
AYTU’s largest tracked holder by dollar value, Stonepine Capital Management, LLC, sizes it at 5.7% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 5.7pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in AYTU divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 34 tracked filers holding AYTU, 13 increased or opened the position and 10 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in AYTU between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
Full exits 1
- Arete Wealth Advisors, LLC$4M
Largest adds
- Stonepine Capital Management, LLC$7M
Largest trims
- DIADEMA PARTNERS LP$645K
- Nantahala Capital Management, LLC$630K
- AWM Investment Company, Inc.$359K
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| Stonepine Capital Management, LLC added | 4,990,238 | $10M | 43.2% | 2026-Q2 |
| Nantahala Capital Management, LLC | 1,086,812 | $2M | 10.5% | 2026-Q2 |
| AWM Investment Company, Inc. | 619,574 | $1M | 6.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC | 261,146 | $561K | 2.5% | 2026-Q2 |
| CROWN ADVISORS MANAGEMENT, INC. added | 200,000 | $430K | 1.9% | 2026-Q2 |
| DIADEMA PARTNERS LP trimmed | 148,546 | $319K | 1.4% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 105,326 | $226K | 1.0% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 104,823 | $225K | 1.0% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 93,647 | $201K | 0.9% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 49,414 | $106K | 0.5% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO | 47,048 | $101K | 0.5% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 45,326 | $97K | 0.4% | 2026-Q2 |
| Persistent Asset Partners Ltd trimmed | 37,984 | $82K | 0.4% | 2026-Q2 |
| NORTHERN TRUST CORP added | 27,925 | $60K | 0.3% | 2026-Q2 |
| BELLEVUE ASSET MANAGEMENT, LLC | 25,013 | $54K | 0.2% | 2026-Q2 |
| XTX Topco Ltd trimmed | 21,416 | $46K | 0.2% | 2026-Q2 |
| Daytona Street Capital LLC | 10,000 | $22K | 0.1% | 2026-Q2 |
| UBS Group AG added | 2,377 | $5K | 0.0% | 2026-Q2 |
| Tower Research Capital LLC (TRC) added | 2,232 | $5K | 0.0% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 378 | $1K | 0.0% | 2026-Q2 |
| OSAIC HOLDINGS, INC. | 462 | $991 | 0.0% | 2026-Q2 |
| JPMORGAN CHASE & CO | 154 | $337 | 0.0% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN | 127 | $273 | 0.0% | 2026-Q2 |
| MORGAN STANLEY | 125 | $269 | 0.0% | 2026-Q2 |
| BARCLAYS PLC added | 50 | $108 | 0.0% | 2026-Q2 |
| GROUP ONE TRADING LLC | 37 | $80 | 0.0% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS | 23 | $49 | 0.0% | 2026-Q2 |
| SBI Securities Co., Ltd. trimmed | 10 | $22 | 0.0% | 2026-Q2 |
| Rockefeller Capital Management L.P. | 10 | $22 | 0.0% | 2026-Q2 |
| Farther Finance Advisors, LLC new | 4 | $9 | 0.0% | 2026-Q2 |
| VISION FINANCIAL MARKETS LLC | 2 | $5 | 0.0% | 2026-Q2 |
| Arax Advisory Partners new | 2 | $4 | 0.0% | 2026-Q2 |
| Caitong International Asset Management Co., Ltd | 2 | $4 | 0.0% | 2026-Q2 |
| JONES FINANCIAL COMPANIES LLLP | 1 | $2 | 0.0% | 2026-Q2 |
| Arete Wealth Advisors, LLC new | 49,549 | $4M | 17.9% | 2026-Q1 stale (1 quarter behind) |
| BlackRock, Inc. | 22,793 | $62K | 0.3% | 2026-Q1 stale (1 quarter behind) |
| ACADIAN ASSET MANAGEMENT LLC | 10,237 | $27K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| MAI Capital Management | 3,575 | $10K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| FNY Investment Advisers, LLC trimmed | 90 | — | 0.0% | 2026-Q1 stale (1 quarter behind) |
| TSFG, LLC | 1 | — | 0.0% | 2026-Q1 stale (1 quarter behind) |
| VANGUARD GROUP INC | 278,583 | $724K | 3.3% | 2025-Q4 stale (2 quarters behind) |
| TWO SIGMA ADVISERS, LP added | 42,500 | $110K | 0.5% | 2025-Q4 stale (2 quarters behind) |
| DRW Securities, LLC new | 29,368 | $76K | 0.3% | 2025-Q4 stale (2 quarters behind) |
| Perritt Capital Management Inc new | 20,000 | $52K | 0.2% | 2025-Q4 stale (2 quarters behind) |
| Rothschild Wealth LLC new | 20,000 | $52K | 0.2% | 2025-Q4 stale (2 quarters behind) |
| BANK OF AMERICA CORP /DE/ added | 85 | $221 | 0.0% | 2025-Q4 stale (2 quarters behind) |
| CIBC Private Wealth Group LLC | 83 | $216 | 0.0% | 2025-Q4 stale (2 quarters behind) |
| NewEdge Advisors, LLC | 21 | $55 | 0.0% | 2025-Q4 stale (2 quarters behind) |
| CITIGROUP INC | 1 | $3 | 0.0% | 2025-Q4 stale (2 quarters behind) |
| Jaffetilchin Investment Partners, LLC | 17,437 | $33K | 0.1% | 2025-Q3 stale (3 quarters behind) |
| FMR LLC new | 5 | $9 | 0.0% | 2025-Q3 stale (3 quarters behind) |
| Kanen Wealth Management LLC new | 573,358 | $1M | 5.6% | 2025-Q2 stale (4 quarters behind) |
| HRT FINANCIAL LP new | 19,988 | $43K | 0.2% | 2025-Q2 stale (4 quarters behind) |
| RAYMOND JAMES FINANCIAL INC new | 55 | $120 | 0.0% | 2025-Q2 stale (4 quarters behind) |
| Moser Wealth Advisors, LLC | 10 | $22 | 0.0% | 2025-Q2 stale (4 quarters behind) |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO new | 1 | $2 | 0.0% | 2025-Q2 stale (4 quarters behind) |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale (4 quarters behind) |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.