BDSX · Insider trading · 13F holders · Congress trades
Biodesix Inc (BDSX)
Who is buying and selling BDSX: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 6
- Insider buys, 90 days
- $1.0M
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
BDSX at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 1 BDSX insider filed 2 open-market purchases worth $1.0M on SEC Form 4.
- 6 13F filers hold BDSX among their 50 largest positions, worth $44.9M combined. The biggest bets by portfolio weight are Birchview Capital, LP (3.0%), AIGH Capital Management LLC (1.4%) and Essex Investment Management Co LLC (1.0%).
- No member of Congress has disclosed a trade in BDSX.
- BDSX last closed at $24.72 on Oct 29, 2026.
BDSX insider trading
Between Aug 1, 2026 and Oct 29, 2026, 1 BDSX insider filed 2 open-market purchases worth $1.0M on SEC Form 4.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Aug 13, 2026 | Schuler Jack W | 10% Owner, Emeritus Director | Buy | 15,000 | $24.47 | $367K | SEC |
| Aug 12, 2026 | Schuler Jack W | 10% Owner, Emeritus Director | Buy | 27,600 | $24.13 | $666K | SEC |
Who owns BDSX? Hedge funds and superinvestors
6 13F filers hold BDSX among their 50 largest positions, worth $44.9M combined. The biggest bets by portfolio weight are Birchview Capital, LP (3.0%), AIGH Capital Management LLC (1.4%) and Essex Investment Management Co LLC (1.0%).
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| AIGH Capital Management LLCHedge fund | 1.4% | $15.3M | 678,328 | -10.5% shares | Q2 2026 |
| Telemark Asset Management, LLCHedge fund | 0.8% | $11.0M | 489,824 | +0.0% shares | Q2 2026 |
| Essex Investment Management Co LLCAsset manager | 1.0% | $7.0M | 234,542 | -3.0% shares | Q3 2026 |
| Birchview Capital, LPWealth manager | 3.0% | $6.5M | 286,804 | +0.0% shares | Q2 2026 |
| Opaleye Management Inc.Hedge fund | 0.4% | $4.1M | 180,000 | -24.4% shares | Q2 2026 |
| Perkins Capital Management IncWealth manager | 0.8% | $1.0M | 44,618 | -0.4% shares | Q2 2026 |
Each manager counts with its latest 13F (Q3 2026: 1, Q2 2026: 5). Screen BDSX in the grand portfolio →
BDSX stock trades by members of Congress
No member of Congress has disclosed a trade in BDSX.
BDSX questions and answers
Are insiders buying BDSX stock?
Between Aug 1, 2026 and Oct 29, 2026, 1 BDSX insider filed 2 open-market purchases worth $1.0M on SEC Form 4.
Which hedge funds own BDSX?
6 13F filers hold BDSX among their 50 largest positions, worth $44.9M combined. The biggest bets by portfolio weight are Birchview Capital, LP (3.0%), AIGH Capital Management LLC (1.4%) and Essex Investment Management Co LLC (1.0%).
Has Congress traded BDSX?
No member of Congress has disclosed a trade in BDSX.
Who is the largest holder of BDSX?
Among 13F filers, AIGH Capital Management LLC reports the largest BDSX position, $15.3M (678,328 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Birchview Capital, LP's: 3.0% of its portfolio.
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