Nautilus Biotechnology, Inc. (NAUT) Ownership
NAUT ownership summary
as of October 18, 2026- Institutions
- 43.0% of shares outstanding
- Insiders
- 32.02% of shares outstanding
- Shares outstanding
- 127.3M
- Float
- 67.5M shares available to trade
- Short interest
- 9.21% 5.8M shares short
- Days to cover
- 2.14 short interest up 41.4% vs prior month
- Institutions 43.00%
- Insiders 32.02%
- Other investors 24.98%
NAUT top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Perceptive Advisors LLC | 9.14% | 11.6M | $24.0M | −960,000 (−7.6%) | June 30, 2026 |
| 2 | Cercano Management LLC | 5.64% | 7.2M | $14.8M | — | June 30, 2026 |
| 3 | BlackRock Inc | 2.11% | 2.7M | $5.5M | +2.5M (+1,331.9%) | June 30, 2026 |
| 4 | Vanguard Capital Management, LLC | 2.00% | 2.5M | $5.3M | +4,382 (+0.2%) | June 30, 2026 |
| 5 | Comprehensive Financial Management LLC | 1.73% | 2.2M | $4.5M | — | June 30, 2026 |
| 6 | Citadel Advisors Llc | 1.49% | 1.9M | $3.9M | +1.9M (0.0%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 0.99% | 1.3M | $2.6M | +662,011 (+109.7%) | June 30, 2026 |
| 8 | Acadian Asset Management LLC | 0.83% | 1.1M | $2.2M | +314,215 (+42.4%) | June 30, 2026 |
| 9 | Hartland & Co | 0.70% | 893K | $1.8M | −1.4M (−61.7%) | June 30, 2026 |
| 10 | Susquehanna International Group, LLP | 0.70% | 891K | $1.8M | +890,949 (0.0%) | June 30, 2026 |
| 11 | Sentinel Trust CO Lba | 0.59% | 750K | $1.5M | — | June 30, 2026 |
| 12 | Barclays PLC | 0.57% | 725K | $1.5M | +651,996 (+889.2%) | June 30, 2026 |
| 13 | Renaissance Technologies Corp | 0.54% | 691K | $1.4M | +424,814 (+159.9%) | June 30, 2026 |
| 14 | JPMorgan Chase & Co | 0.48% | 614K | $1.3M | +614,177 (0.0%) | June 30, 2026 |
| 15 | State Street Corp | 0.44% | 560K | $1.2M | +343,238 (+158.7%) | June 30, 2026 |
| 16 | Dimensional Fund Advisors, Inc. | 0.37% | 476K | $980,239 | +146,721 (+44.6%) | June 30, 2026 |
| 17 | Northern Trust Corp | 0.30% | 381K | $785,342 | +274,223 (+256.3%) | June 30, 2026 |
| 18 | HRT FINANCIAL LLC | 0.28% | 361K | $743,810 | +295,819 (+453.3%) | June 30, 2026 |
| 19 | Vanguard Fiduciary Trust Co | 0.28% | 353K | $727,372 | +47,567 (+15.6%) | June 30, 2026 |
| 20 | Vanguard Portfolio Management, LLC | 0.27% | 338K | $695,761 | +337,748 (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, 15 holders added 9.4M shares and 2 cut 2.4M.
NAUT top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 1.52% | 1.9M | $4.0M | — | August 31, 2026 |
| 2 | iShares Russell 2000 ETF | 1.05% | 1.3M | $2.8M | −15,488 (−1.1%) | September 30, 2026 |
| 3 | JPMorgan Small Cap Value I | 0.50% | 632K | $1.3M | — | August 31, 2026 |
| 4 | Fidelity Small Cap Index | 0.43% | 542K | $1.1M | −667 (−0.1%) | July 31, 2026 |
| 5 | iShares Russell 2000 Value ETF | 0.42% | 536K | $1.1M | +812 (+0.2%) | September 30, 2026 |
| 6 | Vanguard Russell 2000 ETF | 0.23% | 287K | $591,368 | +5,640 (+2.0%) | August 31, 2026 |
| 7 | iShares Micro-Cap ETF | 0.14% | 182K | $375,888 | −1,258 (−0.7%) | September 30, 2026 |
| 8 | BSF Systematic US Eq Abs Ret A2 USD | 0.11% | 136K | $281,106 | — | December 31, 2025 |
| 9 | VALIC Company I Small Cap Value | 0.10% | 124K | $254,878 | −2,662 (−2.1%) | August 31, 2026 |
| 10 | Schwab Small Cap Index | 0.10% | 121K | $249,505 | — | August 31, 2026 |
| 11 | Russell Inv US Small Cap Equity Y | 0.08% | 100K | $206,795 | — | August 31, 2026 |
| 12 | Fidelity Extended Market Index | 0.07% | 93K | $192,406 | −502 (−0.5%) | August 31, 2026 |
| 13 | iShares Russell 2000 Small-Cap Idx Instl | 0.07% | 93K | $191,491 | — | August 31, 2026 |
| 14 | Fidelity Total Market Index | 0.07% | 91K | $188,401 | — | August 31, 2026 |
| 15 | BrighthouseI JPMorgan Small Cap Value A | 0.07% | 91K | $187,190 | +90,869 (0.0%) | June 30, 2026 |
| 16 | EA Bridgeway Ultra-Small Company Mkt ETF | 0.06% | 75K | $154,500 | — | September 30, 2026 |
| 17 | Fidelity Series Total Market Index | 0.06% | 74K | $151,585 | — | August 31, 2026 |
| 18 | iShares Russell 2000 Growth ETF | 0.05% | 68K | $139,425 | −86 (−0.1%) | September 30, 2026 |
| 19 | Nuveen Small Cap Blend Idx R6 | 0.05% | 66K | $136,376 | — | August 31, 2026 |
| 20 | Fidelity Small Cap Value Index | 0.05% | 63K | $129,316 | — | July 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
NAUT insider transactions
latest 8| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-04 | Sujal M Patel | Buy | $2.61 | 25,000 | $65,250 |
| 2025-11-06 | Kentaro Suzuki | Buy | $1.49 | 4,000 | $5,960 |
| 2025-09-08 | Sujal M Patel | Buy | $0.68 | 83,500 | $56,780 |
| 2025-09-05 | Sujal M Patel | Buy | $0.67 | 116,500 | $78,055 |
| 2025-09-04 | Matthew B Murphy | Buy | $0.64 | 20,000 | $12,800 |
| 2025-05-29 | Anna Mowry | Buy | $0.77 | 15,000 | $11,550 |
| 2025-05-12 | Parag Mallick | Buy | $0.73 | 1,500 | $1,095 |
| 2025-05-08 | Parag Mallick | Buy | $0.73 | 12,000 | $8,760 |
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.
NAUT shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns NAUT
Institutional investors own 43.0% of Nautilus Biotechnology's shares and insiders 32.02%. The largest holder is Perceptive Advisors LLC with 9.14% of the shares (11.6M), as of June 30, 2026. Among the top 20 institutions, 15 added shares and 2 reduced their stake in the latest filings. Short interest is 9.21% of the float, or 2.14 days of average trading volume. The share count rose 1,656.5% since 2018.
Related: NAUT analyst forecast, NAUT key metrics. See the NAUT stock overview for the latest quote and news.
NAUT ownership FAQ
Who owns the most Nautilus Biotechnology stock?
The largest shareholders of Nautilus Biotechnology are Perceptive Advisors LLC (9.14%), Cercano Management LLC (5.64%), BlackRock Inc (2.11%), Vanguard Capital Management, LLC (2.00%), Comprehensive Financial Management LLC (1.73%).
What percentage of Nautilus Biotechnology is owned by institutions?
Institutions hold 43.0% of Nautilus Biotechnology's shares outstanding; insiders hold 32.02%.
Which funds own Nautilus Biotechnology?
The largest fund holders of Nautilus Biotechnology are Vanguard MStar Total Stk Mkt Idx Invest (1.52%), iShares Russell 2000 ETF (1.05%), JPMorgan Small Cap Value I (0.50%), Fidelity Small Cap Index (0.43%), iShares Russell 2000 Value ETF (0.42%).
What is Nautilus Biotechnology's short interest?
5.8M shares of Nautilus Biotechnology were sold short, 9.21% of the float; at the average daily volume it would take 2.14 days to cover.
Are insiders buying or selling Nautilus Biotechnology?
Of the latest 8 reported insider transactions in Nautilus Biotechnology (since May 8, 2025), 8 were purchases and 0 were sales.
How many shares of Nautilus Biotechnology are outstanding?
Nautilus Biotechnology has 127.3M shares outstanding, of which 67.5M are in the public float.