Biodesix, Inc. (BDSX) Ownership
BDSX ownership summary
as of October 18, 2026- Institutions
- 41.4% of shares outstanding
- Insiders
- 40.15% of shares outstanding
- Shares outstanding
- 10.6M
- Float
- 5.0M shares available to trade
- Short interest
- 3.31% 202K shares short
- Days to cover
- 2.26 short interest down 5.7% vs prior month
- Institutions 41.42%
- Insiders 40.15%
- Other investors 18.44%
BDSX top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | AIGH Capital Management, LLC | 6.43% | 678K | $16.0M | −80,000 (−10.5%) | June 30, 2026 |
| 2 | Soleus Capital Management, L.P. | 5.55% | 586K | $13.9M | +169,359 (+40.7%) | June 30, 2026 |
| 3 | Telemark Asset Management, LLC | 4.64% | 490K | $11.6M | — | June 30, 2026 |
| 4 | Aberdeen Group PLC | 3.68% | 389K | $9.2M | −69,799 (−15.2%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 2.69% | 284K | $6.7M | +29,008 (+11.4%) | June 30, 2026 |
| 6 | Essex Investment Management Company, LLC | 2.29% | 242K | $5.7M | +109,829 (+83.1%) | June 30, 2026 |
| 7 | Opaleye Management Inc | 1.71% | 180K | $4.3M | −58,047 (−24.4%) | June 30, 2026 |
| 8 | Marshall Wace Asset Management Ltd | 1.10% | 116K | $2.7M | −25,437 (−18.0%) | June 30, 2026 |
| 9 | Perceptive Advisors LLC | 1.03% | 109K | $2.6M | +108,694 (0.0%) | June 30, 2026 |
| 10 | Jane Street Group LLC | 0.87% | 92K | $2.2M | +64,475 (+238.5%) | June 30, 2026 |
| 11 | Two Sigma Investments LLC | 0.82% | 87K | $2.1M | +41,593 (+92.0%) | June 30, 2026 |
| 12 | Legato Capital Management LLC | 0.77% | 81K | $1.9M | +40,207 (+97.7%) | June 30, 2026 |
| 13 | Walleye Trading Advisors, LLC | 0.71% | 74K | $1.8M | +63,607 (+586.8%) | June 30, 2026 |
| 14 | StemPoint Capital LP | 0.66% | 70K | $1.7M | −70,008 (−50.0%) | June 30, 2026 |
| 15 | Geode Capital Management, LLC | 0.64% | 68K | $1.6M | +17,659 (+35.3%) | June 30, 2026 |
| 16 | Trexquant Investment LP | 0.55% | 58K | $1.4M | −11,629 (−16.7%) | June 30, 2026 |
| 17 | GSA Capital Partners LLP | 0.45% | 47K | $1.1M | +7,583 (+19.2%) | June 30, 2026 |
| 18 | Perkins Capital Management Inc | 0.42% | 45K | $1.1M | −165 (−0.4%) | June 30, 2026 |
| 19 | BlackRock Inc | 0.41% | 43K | $1.0M | +18,560 (+75.9%) | June 30, 2026 |
| 20 | Blair William & Co | 0.39% | 42K | $983,026 | +13,965 (+50.6%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 12 holders added 685K shares and 7 cut 315K.
BDSX top mutual fund and ETF holders
17 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | abrdn Healthcare Opportunities | 2.73% | 288K | $6.8M | −32,465 (−10.1%) | August 31, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 1.93% | 204K | $4.8M | — | August 31, 2026 |
| 3 | 1290 Essex Small Cap Growth I | 0.56% | 59K | $1.4M | — | August 31, 2026 |
| 4 | Fidelity Extended Market Index | 0.28% | 30K | $708,215 | −161 (−0.5%) | August 31, 2026 |
| 5 | iShares Micro-Cap ETF | 0.17% | 18K | $422,615 | −123 (−0.7%) | September 30, 2026 |
| 6 | Bridgeway Ultra-Small Company | 0.14% | 15K | $354,900 | +15,000 (0.0%) | June 30, 2026 |
| 7 | EA Bridgeway Ultra-Small Company Mkt ETF | 0.12% | 13K | $299,725 | — | September 30, 2026 |
| 8 | Fidelity Total Market Index | 0.11% | 11K | $267,216 | +422 (+3.9%) | August 31, 2026 |
| 9 | Fidelity Series Total Market Index | 0.09% | 9,642 | $228,130 | +684 (+7.6%) | August 31, 2026 |
| 10 | Vanguard MStar Inst Ttl StkMktIdxInstlPl | 0.04% | 4,505 | $106,588 | — | August 31, 2026 |
| 11 | Vanguard Balanced Index Inv | 0.03% | 3,533 | $83,591 | — | August 31, 2026 |
| 12 | Vanguard U.S. Eq Idx £ Acc | 0.03% | 2,646 | $62,604 | — | August 31, 2026 |
| 13 | Fidelity Nasdaq Composite Index | 0.02% | 2,496 | $59,055 | −4,221 (−62.8%) | August 31, 2026 |
| 14 | 1290 VT Micro Cap K | 0.01% | 1,156 | $27,351 | — | August 31, 2026 |
| 15 | Corgi Genomics & Precision Medicine ETF | 0.01% | 630 | $14,906 | — | September 30, 2026 |
| 16 | Victory Extended Market Index | 0.01% | 537 | $12,705 | +537 (0.0%) | June 30, 2026 |
| 17 | JHVIT Total Stock Market Index I | <0.01% | 191 | $4,519 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
BDSX insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-23 | Gary Anthony Pestano | Sell | $12.78 | 556 | $7,106 |
| 2026-02-23 | Kieran O'kane | Sell | $12.78 | 535 | $6,837 |
| 2026-02-23 | Robin Harper Cowie | Sell | $12.78 | 535 | $6,837 |
| 2026-02-23 | Scott Hutton | Sell | $12.78 | 1,490 | $19,042 |
| 2026-02-23 | Chris Vazquez | Sell | $12.78 | 211 | $2,697 |
| 2026-02-10 | Chris Vazquez | Sell | $10.08 | 101 | $1,018 |
| 2026-02-10 | Gary Anthony Pestano | Sell | $10.08 | 540 | $5,443 |
| 2026-02-10 | Kieran O'kane | Sell | $10.08 | 584 | $5,887 |
| 2026-02-10 | Robin Harper Cowie | Sell | $10.08 | 941 | $9,485 |
| 2026-02-10 | Scott Hutton | Sell | $10.08 | 3,559 | $35,875 |
| 2026-01-26 | Jack W Schuler | Buy | $11.80 | 20,000 | $236,000 |
| 2026-01-23 | Jack W Schuler | Buy | $11.81 | 80,000 | $944,800 |
| 2026-01-22 | Jack W Schuler | Buy | $10.96 | 82,465 | $903,816 |
| 2026-01-16 | Chris Vazquez | Sell | $8.15 | 83 | $676 |
| 2026-01-16 | Gary Anthony Pestano | Sell | $8.15 | 298 | $2,429 |
| 2026-01-16 | Kieran O'kane | Sell | $8.15 | 298 | $2,429 |
| 2026-01-16 | Robin Harper Cowie | Sell | $8.15 | 298 | $2,429 |
| 2026-01-16 | Scott Hutton | Sell | $8.15 | 970 | $7,906 |
| 2025-11-10 | Chris Vazquez | Sell | $7.62 | 13 | $99 |
| 2025-11-10 | Scott Hutton | Sell | $7.62 | 189 | $1,440 |
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.
BDSX shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns BDSX
Institutional investors own 41.4% of Biodesix's shares and insiders 40.15%. The largest holder is AIGH Capital Management, LLC with 6.43% of the shares (678K), as of June 30, 2026. Among the top 20 institutions, 12 added shares and 7 reduced their stake in the latest filings. Short interest is 3.31% of the float, or 2.26 days of average trading volume. The share count fell 69.1% since 2017.
Related: BDSX analyst forecast, BDSX key metrics. See the BDSX stock overview for the latest quote and news.
BDSX ownership FAQ
Who owns the most Biodesix stock?
The largest shareholders of Biodesix are AIGH Capital Management, LLC (6.43%), Soleus Capital Management, L.P. (5.55%), Telemark Asset Management, LLC (4.64%), Aberdeen Group PLC (3.68%), Vanguard Capital Management, LLC (2.69%).
What percentage of Biodesix is owned by institutions?
Institutions hold 41.4% of Biodesix's shares outstanding; insiders hold 40.15%.
Which funds own Biodesix?
The largest fund holders of Biodesix are abrdn Healthcare Opportunities (2.73%), Vanguard MStar Total Stk Mkt Idx Invest (1.93%), 1290 Essex Small Cap Growth I (0.56%), Fidelity Extended Market Index (0.28%), iShares Micro-Cap ETF (0.17%).
What is Biodesix's short interest?
202K shares of Biodesix were sold short, 3.31% of the float; at the average daily volume it would take 2.26 days to cover.
Are insiders buying or selling Biodesix?
Of the latest 20 reported insider transactions in Biodesix (since November 10, 2025), 3 were purchases and 17 were sales.
How many shares of Biodesix are outstanding?
Biodesix has 10.6M shares outstanding, of which 5.0M are in the public float.