AYTU
Aytu Biopharma, IncCompany with tickers: AYTU
CIK
1385818
CUSIP
054754858
Shares Outstanding
10,733,208
13F Activity (30d)
31 filings
31 filers
Holders: 37
Total Value: $10,791,197
Total Shares: 3,952,827
Institutional Ownership Trend
Holder Concentration
Across 37 13F filers · Δ vs Dec 31, 2025Top Holder
27.5%
−1.3 pts
Top 5
78.8%
−3.6 pts
Top 10
92.6%
−0.2 pts
HHI
1,573
Moderately concentrated
−141
Quarterly Activity
vs Dec 31, 2025
New
7
Increased
9
Decreased
5
Sold Out
9
Unchanged
16
Holder count:
-2
Institutional value:
+10.0%
Shares held:
+4.8%
Top Buyers
vs Dec 31, 2025| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Small DIADEMA PARTNERS LP | +47,289 | 353,077 | |
| Mega CITADEL ADVISORS LLC | +21,290 | 36,841 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC | +18,539 | 92,636 | |
| Mega TWO SIGMA INVESTMENTS, LP | +14,840 | 121,973 | |
| Small Persistent Asset Partners Ltd | +13,482 | 92,897 |
Top Sellers
vs Dec 31, 2025| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Small FNY Investment Advisers, LLC | −31,510 | 90 | |
| Small Stonepine Capital Management, LLC | −21,415 | 792,289 | |
| Mid XTX Topco Ltd | −4,278 | 21,582 | |
| Mega UBS Group AG | −1,386 | 1,663 | |
| Mid Tower Research Capital LLC (TRC) | −149 | 1,564 |
Top New Positions
vs Dec 31, 2025| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD CAPITAL MANAGEMENT LLC | 261,146 | $712,928 | |
| Small CROWN ADVISORS MANAGEMENT, INC. | 145,000 | $395,850 | |
| Small Arete Wealth Advisors, LLC | 49,549 | $135,268 | |
| Mega VANGUARD FIDUCIARY TRUST CO | 47,048 | $128,441 | |
| Mega JPMORGAN CHASE & CO | 154 | $420 |
Top Sold-Out Positions
vs Dec 31, 2025| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD GROUP INC | 278,583 | $724,315 | |
| Large TWO SIGMA ADVISERS, LP | 42,500 | $110,500 | |
| Mid DRW Securities, LLC | 29,368 | $76,356 | |
| Micro Perritt Capital Management Inc | 20,000 | $52,000 | |
| Small Rothschild Wealth LLC | 20,000 | $52,000 |
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Open | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Mid Nantahala Capital Management, LLC | $2,966,996 | 27.49% | 1,086,812 | Shares | Sole | 2026-05-15 | ||||
| Small Stonepine Capital Management, LLC | $2,162,948 | 20.04% | 792,289 | Shares | Sole | 2026-05-14 | ||||
| Small AWM Investment Company, Inc. | $1,691,437 | 15.67% | 619,574 | Shares | Sole | 2026-05-15 | ||||
| Small DIADEMA PARTNERS LP | $963,900 | 8.93% | 353,077 | Shares | Sole | 2026-05-15 | ||||
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $712,928 | 6.61% | 261,146 | Shares | Defined | 2026-05-08 | ||||
| Small CROWN ADVISORS MANAGEMENT, INC. | $395,850 | 3.67% | 145,000 | Shares | Sole | 2026-05-08 | ||||
| Mega TWO SIGMA INVESTMENTS, LP | $332,986 | 3.09% | 121,973 | Shares | Sole | 2026-05-15 | ||||
| Large RENAISSANCE TECHNOLOGIES LLC | $255,863 | 2.37% | 93,723 | Shares | Sole | 2026-05-14 | ||||
| Small Persistent Asset Partners Ltd | $253,608 | 2.35% | 92,897 | Shares | Sole | 2026-05-12 | ||||
| Mega GEODE CAPITAL MANAGEMENT, LLC | $252,896 | 2.34% | 92,636 | Shares | Defined | 2026-05-15 | ||||
| Small Arete Wealth Advisors, LLC | $135,268 | 1.25% | 49,549 | Shares | Sole | 2026-05-18 | ||||
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $128,441 | 1.19% | 47,048 | Shares | Defined | 2026-05-08 | ||||
| Mega DIMENSIONAL FUND ADVISORS LP | $118,986 | 1.10% | 43,585 | Shares | Sole | 2026-05-07 | ||||
| Mega CITADEL ADVISORS LLC | $100,575 | 0.93% | 36,841 | Shares | Defined | 2026-05-15 | ||||
| Small BELLEVUE ASSET MANAGEMENT, LLC | $68,285 | 0.63% | 25,013 | Shares | Sole | 2026-04-24 | ||||
| Mega BlackRock, Inc. | $62,224 | 0.58% | 22,793 | Shares | Sole | 2026-05-13 | ||||
| Mid XTX Topco Ltd | $58,918 | 0.55% | 21,582 | Shares | Defined | 2026-05-15 | ||||
| Mega NORTHERN TRUST CORP Bank | $52,331 | 0.48% | 19,169 | Shares | Defined | 2026-05-14 | ||||
| Large ACADIAN ASSET MANAGEMENT LLC | $27,947 | 0.26% | 10,237 | Shares | Defined | 2026-05-13 | ||||
| Small Daytona Street Capital LLC | $27,300 | 0.25% | 10,000 | Shares | Sole | 2026-04-10 | ||||
| Mid MAI Capital Management | $9,759 | 0.09% | 3,575 | Shares | Sole | 2026-05-15 | ||||
| Mega UBS Group AG | $4,538 | 0.04% | 1,663 | Shares | Defined | 2026-05-05 | ||||
| Mid Tower Research Capital LLC (TRC) | $4,269 | 0.04% | 1,564 | Shares | Defined | 2026-05-15 | ||||
| Large OSAIC HOLDINGS, INC. | $1,261 | 0.01% | 462 | Shares | Defined | 2026-05-15 | ||||
| Mega JPMORGAN CHASE & CO | $420 | 0.00% | 154 | Shares | Defined | 2026-05-13 | ||||
| Mega WELLS FARGO & COMPANY/MN | $345 | 0.00% | 127 | Shares | Defined | 2026-05-11 | ||||
| Mega MORGAN STANLEY | $341 | 0.00% | 125 | Shares | Defined | 2026-05-15 | ||||
| Small FNY Investment Advisers, LLC | $245 | 0.00% | 90 | Shares | Sole | 2026-04-15 | ||||
| Mid GROUP ONE TRADING LLC | $101 | 0.00% | 37 | Shares | Sole | 2026-05-13 | ||||
| Mega ROYAL BANK OF CANADA Bank | $98 | 0.00% | 36 | Shares | Defined | 2026-05-15 | ||||
| Mega BNP PARIBAS ARBITRAGE, SA | $62 | 0.00% | 23 | Shares | Defined | 2026-05-12 | ||||
| Mid SBI Securities Co., Ltd. Broker-Dealer | $30 | 0.00% | 11 | Shares | Defined | 2026-04-28 | ||||
| Large Rockefeller Capital Management L.P. | $27 | 0.00% | 10 | Shares | Defined | 2026-05-14 | ||||
| Micro VISION FINANCIAL MARKETS LLC | $5 | 0.00% | 2 | Shares | Sole | 2026-04-24 | ||||
| Small Caitong International Asset Management Co., Ltd | $5 | 0.00% | 2 | Shares | Sole | 2026-05-11 | ||||
| Large JONES FINANCIAL COMPANIES LLLP | $2 | 0.00% | 1 | Shares | Sole | 2026-05-15 | ||||
| Small TSFG, LLC | $2 | 0.00% | 1 | Shares | Sole | 2026-04-27 | ||||
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