Outlook Therapeutics, Inc. (OTLK) Ownership
OTLK ownership summary
as of October 17, 2026- Institutions
- 25.4% of shares outstanding
- Insiders
- 12.64% of shares outstanding
- Shares outstanding
- 243.4M
- Float
- 176.6M shares available to trade
- Short interest
- 13.88% 31.9M shares short
- Days to cover
- 7.10 short interest down 1.0% vs prior month
- Institutions 25.44%
- Insiders 12.64%
- Other investors 61.92%
OTLK top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard Capital Management, LLC | 1.80% | 4.4M | $2.1M | +2.4M (+122.5%) | June 30, 2026 |
| 2 | Perceptive Advisors LLC | 1.29% | 3.1M | $1.5M | +3.1M (0.0%) | June 30, 2026 |
| 3 | Marshall Wace Asset Management Ltd | 0.82% | 2.0M | $969,938 | +2.0M (0.0%) | June 30, 2026 |
| 4 | BlackRock Inc | 0.69% | 1.7M | $814,267 | +1.2M (+249.5%) | June 30, 2026 |
| 5 | Jane Street Group LLC | 0.59% | 1.4M | $695,532 | +1.4M (0.0%) | June 30, 2026 |
| 6 | Geode Capital Management, LLC | 0.51% | 1.2M | $607,984 | +642,262 (+106.4%) | June 30, 2026 |
| 7 | Susquehanna International Group, LLP | 0.40% | 968K | $472,477 | +834,106 (+622.1%) | June 30, 2026 |
| 8 | HRT FINANCIAL LLC | 0.32% | 785K | $383,033 | +717,145 (+1,058.4%) | June 30, 2026 |
| 9 | Vanguard Fiduciary Trust Co | 0.27% | 662K | $322,892 | +485,135 (+274.8%) | June 30, 2026 |
| 10 | GILPIN WEALTH MANAGEMENT, LLC | 0.23% | 555K | $270,840 | −45,162 (−7.5%) | June 30, 2026 |
| 11 | State Street Corp | 0.22% | 540K | $263,423 | +376,700 (+231.0%) | June 30, 2026 |
| 12 | CANTOR FITZGERALD, L. P. | 0.18% | 450K | $219,600 | +450,000 (0.0%) | June 30, 2026 |
| 13 | Sanctuary Advisors, LLC | 0.14% | 345K | $168,130 | +344,529 (0.0%) | June 30, 2026 |
| 14 | Group One Trading, LLC | 0.10% | 246K | $120,257 | +132,727 (+116.7%) | June 30, 2026 |
| 15 | Northern Trust Corp | 0.10% | 238K | $115,930 | +170,171 (+252.5%) | June 30, 2026 |
| 16 | SIMPLEX TRADING, LLC | 0.08% | 205K | $100,046 | +72,347 (+54.5%) | June 30, 2026 |
| 17 | LPL Financial Corp | 0.08% | 185K | $90,252 | +151,315 (+450.0%) | June 30, 2026 |
| 18 | UBS Group AG | 0.06% | 152K | $74,281 | +19,146 (+14.4%) | June 30, 2026 |
| 19 | Deutsche Bank AG | 0.05% | 131K | $63,782 | +130,700 (0.0%) | June 30, 2026 |
| 20 | Wealth Management Partners, LLC | 0.05% | 118K | $57,667 | +118,170 (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, 19 holders added 14.8M shares and 1 cut 45K.
OTLK top mutual fund and ETF holders
10 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Albion Enterprise VCT Ord | 3.84% | 9.3M | $4.6M | +9.3M (0.0%) | March 31, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 2.85% | 6.9M | $3.4M | +3.9M (+125.9%) | August 31, 2026 |
| 3 | Fidelity Extended Market Index | 0.22% | 539K | $262,954 | +9,673 (+1.8%) | August 31, 2026 |
| 4 | Fidelity Total Market Index | 0.08% | 197K | $96,166 | — | August 31, 2026 |
| 5 | Fidelity Series Total Market Index | 0.07% | 160K | $77,875 | — | August 31, 2026 |
| 6 | Vanguard Balanced Index Inv | 0.05% | 116K | $56,847 | +86,869 (+293.3%) | August 31, 2026 |
| 7 | Vanguard MStar Inst Ttl StkMktIdxInstlPl | 0.02% | 46K | $22,500 | — | August 31, 2026 |
| 8 | Vanguard U.S. Eq Idx £ Acc | 0.02% | 41K | $20,075 | — | August 31, 2026 |
| 9 | JHVIT Total Stock Market Index I | <0.01% | 2,556 | $1,247 | +2,556 (0.0%) | August 31, 2026 |
| 10 | Knights of Columbus U.S. All Cap Idx I | <0.01% | 603 | $294 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
OTLK insider transactions
latest 2| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2024-09-26 | Lawrence A Kenyon | Buy | $5.69 | 5,000 | $28,450 |
| 2024-03-28 | Yezan Munther Haddadin | Buy | $11.82 | 1,882 | $22,245 |
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.
OTLK shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns OTLK
Institutional investors own 25.4% of Outlook Therapeutics's shares and insiders 12.64%. The largest holder is Vanguard Capital Management, LLC with 1.80% of the shares (4.4M), as of June 30, 2026. Among the top 20 institutions, 19 added shares and 1 reduced their stake in the latest filings. Short interest is 13.88% of the float, or 7.10 days of average trading volume. The share count rose 27,031.4% since 2014.
Related: OTLK analyst forecast, OTLK key metrics. See the OTLK stock overview for the latest quote and news.
OTLK ownership FAQ
Who owns the most Outlook Therapeutics stock?
The largest shareholders of Outlook Therapeutics are Vanguard Capital Management, LLC (1.80%), Perceptive Advisors LLC (1.29%), Marshall Wace Asset Management Ltd (0.82%), BlackRock Inc (0.69%), Jane Street Group LLC (0.59%).
What percentage of Outlook Therapeutics is owned by institutions?
Institutions hold 25.4% of Outlook Therapeutics's shares outstanding; insiders hold 12.64%.
Which funds own Outlook Therapeutics?
The largest fund holders of Outlook Therapeutics are Albion Enterprise VCT Ord (3.84%), Vanguard MStar Total Stk Mkt Idx Invest (2.85%), Fidelity Extended Market Index (0.22%), Fidelity Total Market Index (0.08%), Fidelity Series Total Market Index (0.07%).
What is Outlook Therapeutics's short interest?
31.9M shares of Outlook Therapeutics were sold short, 13.88% of the float; at the average daily volume it would take 7.10 days to cover.
Are insiders buying or selling Outlook Therapeutics?
Of the latest 2 reported insider transactions in Outlook Therapeutics (since March 28, 2024), 2 were purchases and 0 were sales.
How many shares of Outlook Therapeutics are outstanding?
Outlook Therapeutics has 243.4M shares outstanding, of which 176.6M are in the public float.