Biodesix, Inc.
Biodesix, Inc. (BDSX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · BDSX · as of Sep 30, 2025
Ownership Breakdown
27
Institutional Holders
▼ 14 vs Q2
$10.84M
Total Inst. Value
▲ $791,223 vs Q2
8.14M
Shares Outstanding
freeFloat 39.18%
1.44M
13F Shares Held
▼ 34.18M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
BDSX largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
TELEMARK ASSET MANAGEMENT, LLC services-medical laboratories | 414.1K | 5.52% | 5.52% | $3.13B | Nov 10, 2025 | NEW |
BIRCHVIEW CAPITAL, LP services-medical laboratories | 286.8K | 3.82% | 3.82% | $2.17B | Nov 13, 2025 | ▼ 5.45M |
VANGUARD GROUP INC services-medical laboratories | 181.9K | 2.43% | 2.43% | $1.37B | Nov 7, 2025 | NEW |
PERCEPTIVE ADVISORS LLC services-medical laboratories | 108.7K | 1.45% | 1.45% | $820.64M | Nov 14, 2025 | NEW |
MONASHEE INVESTMENT MANAGEMENT LLC services-medical laboratories | 100.0K | 1.33% | 1.33% | $754.97M | Nov 12, 2025 | NEW |
PERKINS CAPITAL MANAGEMENT INC services-medical laboratories | 52.6K | 70.18% | 70.18% | $397.38M | Oct 31, 2025 | NEW |
SILVERARC CAPITAL MANAGEMENT, LLC services-medical laboratories | 49.6K | 66.14% | 66.14% | $374.53M | Nov 12, 2025 | NEW |
GSA CAPITAL PARTNERS LLP services-medical laboratories | 48.3K | 64.46% | 64.46% | $365.00M | Nov 7, 2025 | NEW |
BALYASNY ASSET MANAGEMENT L.P. services-medical laboratories | 43.0K | 57.37% | 57.37% | $324.83M | Nov 14, 2025 | NEW |
GEODE CAPITAL MANAGEMENT, LLC services-medical laboratories | 40.2K | 53.62% | 53.62% | $303.73M | Nov 12, 2025 | NEW |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
1
Increased
+22.9K shares26
New Positions
first time holders1
Decreased
−5.45M shares22
Sold Out
fully exitedNet shares change (top 50)
5.43M
+22.9K / −5.45M
Net new holders
+4
26 new / 22 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
BDSX insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
37
Buy transactions
37
Sell transactions
1.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Pestano Gary Anthony Chief Development Officer | Feb 23, 2026 | Sale | 556 | $12.78 | $7.1K | 10.4K | Form 4 ↗ |
O'Kane Kieran Chief Commercial Officer | Feb 23, 2026 | Sale | 535 | $12.78 | $6.8K | 9.8K | Form 4 ↗ |
Cowie Robin Harper CFO, Sec'y & Treasurer | Feb 23, 2026 | Sale | 535 | $12.78 | $6.8K | 16.2K | Form 4 ↗ |
Vazquez Chris Chief Accounting Officer | Feb 23, 2026 | Sale | 211 | $12.78 | $2.7K | 1.6K | Form 4 ↗ |
Hutton Scott President & CEO | Feb 23, 2026 | Sale | 1,490 | $12.78 | $19.0K | 48.8K | Form 4 ↗ |
O'Kane Kieran Chief Commercial Officer | Feb 10, 2026 | Sale | 584 | $10.08 | $5.9K | 8.9K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Biodesix, Inc. (BDSX) is primarily owned by institutional investors, who hold approximately 17.6% of total shares outstanding. Company insiders own approximately 60.82%, while retail and public investors account for the remaining 21.54%.
The largest institutional shareholder of Biodesix, Inc. is TELEMARK ASSET MANAGEMENT, LLC, holding approximately 414,124 shares — equal to 5.52% of outstanding shares — as of September 30, 2025.
A total of 27 institutional investors currently hold BDSX stock, with a combined institutional value of approximately $10,840,167 as of the most recent 13F filing period.
Frequently asked questions
BDSX ownershipBiodesix, Inc. (BDSX) is primarily owned by institutional investors, who hold approximately 17.6% of shares. The largest shareholder is TELEMARK ASSET MANAGEMENT, LLC with a 5.52% stake. Company insiders hold 60.82%. Data sourced from SEC Form 13F as of September 30, 2025.