Bambusa Therapeutics, Inc. (BBTX): Insider Trades and Fund Holdings
In the past 12 months, Bambusa Therapeutics, Inc. insiders reported 4 open-market purchases worth $58.6M and no sales.
Price today, live from TradingView. Values and changes on this page use our weekly prices (as of Oct 2), so trades line up with filings. Why
What the filings say about BBTX
Every open-market trade by Bambusa Therapeutics, Inc. insiders in the past year was a purchase: 4, worth $58.6 million, with no sales.
3 different insiders bought within the last 90 days. Several insiders buying around the same time (a "cluster") has historically been a stronger sign than a single purchase.
3 insiders traded: Ra Capital Management, L.P. (Director) bought $46.6 million; Helmut Wolfgang Jeggle (Director) bought $6 million; Salvia Investment GmbH (10% owner) bought $6 million.
The largest purchase, $40 million by Ra Capital Management, L.P. on November 2, 2026, was made at about $16.00 a share: a reference point for anyone weighing the stock today.
The most recent filing was on November 3, 2026: Ra Capital Management, L.P. bought $40 million.
Written from the filings listed under Sources at the end of this page. Not investment advice.
Timeline: news and trades
Company filings (8-K), insider trades, notices of planned sales (Form 144), Congress trades and fund moves in the past year, newest first.
- Nov 2, 2026Insider buyDirector Ra Capital Management, L.P. bought $40 million
- Nov 2, 2026Insider buyDirector Helmut Wolfgang Jeggle bought $6 million
- Nov 2, 2026Insider buy10% owner Salvia Investment GmbH bought $6 million
- Oct 30, 2026Insider buyDirector Ra Capital Management, L.P. bought $6.6 million
Daily chart and analysis
Live daily prices and indicators from TradingView. The chart above uses our weekly prices so trades line up with filings.
Recent insider trades
Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Nov 3, 2026.
| Filed | Insider | Type | Value | Score |
|---|---|---|---|---|
| Nov 3 | Ra Capital Management, L.P.Director | ▲ BUY | $40.0M | 62 |
| Nov 3 | Ra Capital Management, L.P.Director | ▲ BUY | $6.64M | 70 |
| Nov 2 | Helmut Wolfgang JeggleDirector | ▲ BUY | $6.00M | 52 |
| Nov 2 | Salvia Investment GmbH10% owner | ▲ BUY | $6.00M | 48 |
Insiders who traded in the past year
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Ra Capital Management, L.P. | Director | 2 | $46.6M | 0 | $0 |
| Helmut Wolfgang Jeggle | Director | 1 | $6.00M | 0 | $0 |
| Salvia Investment GmbH | 10% owner | 1 | $6.00M | 0 | $0 |
70 Ra Capital Management, L.P. (Director), 2026-10-30. What the score means
Related stocks
Other busy stocks in Health Care.
Reading these numbers
Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →
Sources
- Form 4: Ra Capital Management, L.P., purchase · filed 2026-11-03
- Form 4: Ra Capital Management, L.P., purchase · filed 2026-11-03
- Form 4: Helmut Wolfgang Jeggle, purchase · filed 2026-11-02
- Form 4: Salvia Investment GmbH, purchase · filed 2026-11-02
All 4 Form 4 filings for BBTX are in the table above, each linked to the SEC.
About this page
Insider trades reported on SEC Form 4: when the people who run a company buy or sell its shares with their own money.
How to read it
- Form 4
- The form a company insider (officer, director or owner of more than 10%) must file with the SEC within two business days of buying or selling the company's shares.
- Buy (P) and Sell (S)
- Open-market purchases and sales. Gifts, option exercises and automatic tax withholding are left out because they say little about what the insider thinks.
- Value
- Shares times price, as reported on the filing.
- 10b5-1
- A trade made under a plan set up in advance. Planned sales are common and usually say less than an unplanned purchase.
- Late filing
- A Form 4 filed more than two business days after the trade.
- Vs. S&P 500
- How the stock did after the trade minus how the overall market did in the same weeks.
A real example
In January 2016, when bank stocks were falling, JPMorgan Chase CEO Jamie Dimon bought 500,000 JPMorgan shares with his own money, worth about $26 million. His Form 4 made the purchase public within days, and investors read it as a strong sign of confidence.
Explain it like I'm 13
If the coach of a team bets his own allowance that his team will win, that tells you something. A Form 4 is the note a company boss must hand in whenever he buys or sells his own company's shares, so everyone can see it.
Data from public SEC filings and congressional reports. Information, not investment advice. Check every number against the filing linked on the page.