RA Capital Nexus Fund III, L.P. insider trades: Bambusa Therapeutics (BBTX) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where RA Capital Nexus Fund III, L.P. reports to the SEC
and 6 more companies
Open-market buys and sales
30 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Nov 2, 2026 | BBTX | ↑ Buy | 2,953,820 | $15.79 | $46.6M | Indirect | Nov 3, 2026 (1d) |
| Sep 17, 2026 | SION | ↓ Sell | 3,448,811 | $6.33 | $21.8M | Indirect | Sep 21, 2026 (4d) |
| Aug 12, 2026 | SEPN | ↓ Sell | 1,493,000 | $42.50 | $63.5M | Indirect | Aug 14, 2026 (2d) |
| Jul 31, 2026 | ARTV | ↑ Buy | 45,768 | $9.96 | $456K | Indirect | Jul 31, 2026 (0d) |
| Jul 24, 2026 | ARTV | ↑ Buy | 41,319 | $9.99 | $413K | Indirect | Jul 28, 2026 (4d) |
| Jul 23, 2026 | ARTV | ↑ Buy | 264,586 | $9.76 | $2.6M | Indirect | Jul 23, 2026 (0d) |
| Jul 22, 2026 | PBLS | ↑ Buy | 244,593 | $28.29 | $6.9M | Indirect | Jul 22, 2026 (0d) |
| Jul 17, 2026 | ARTV | ↑ Buy | 160,354 | $8.93 | $1.4M | Indirect | Jul 20, 2026 (3d) |
| Jul 13, 2026 | ARTV | ↑ Buy | 6,522 | $8.94 | $58K | Indirect | Jul 23, 2026 (10d) |
| Jul 13, 2026 | ARTV | ↑ Buy | 21,654 | $8.96 | $194K | Indirect | Jul 14, 2026 (1d) |
| Jun 26, 2026 | ARTV | ↑ Buy | 32,876 | $8.89 | $292K | Indirect | Jun 29, 2026 (3d) |
| Jun 16, 2026 | ARTV | ↑ Buy | 531,326 | $8.66 | $4.6M | Indirect | Jun 16, 2026 (0d) |
| Jun 11, 2026 | PBLS | ↑ Buy | 21,188,750 | $20.00 | $423.8M | Indirect | Jun 15, 2026 (4d) |
| Jun 11, 2026 | ARTV | ↑ Buy | 1,027,722 | $7.44 | $7.7M | Indirect | Jun 11, 2026 (0d) |
| May 11, 2026 | ARTV | ↑ Buy | 6,510,416 | $11.52 | $75.0M | Indirect | May 13, 2026 (2d) |
| Mar 30, 2026 | MLYS | ↑ Buy | 369,000 | $23.75 | $8.8M | Indirect | Mar 31, 2026 (1d) |
| Feb 26, 2026 | BCAX | ↑ Buy | 300,000 | $16.00 | $4.8M | Indirect | Mar 2, 2026 (4d) |
| Jan 5, 2026 | CLYM | ↑ Buy | 7,111 | $3.50 | $25K | Indirect | Jan 7, 2026 (2d) |
| Dec 12, 2025 | CLYM | ↑ Buy | 314,561 | $2.40 | $755K | Indirect | Dec 15, 2025 (3d) |
| Nov 21, 2025 | SION | ↓ Sell | 30,316 | $39.61 | $1.2M | Indirect | Nov 24, 2025 (3d) |
| Nov 19, 2025 | SION | ↓ Sell | 136,351 | $40.34 | $5.5M | Indirect | Nov 19, 2025 (0d) |
| Oct 28, 2025 | SION | ↓ Sell | 373,610 | $39.51 | $14.8M | Indirect | Oct 28, 2025 (0d) |
| Sep 4, 2025 | MLYS | ↑ Buy | 1,176,470 | $25.50 | $30.0M | Indirect | Sep 8, 2025 (4d) |
| Mar 13, 2025 | MLYS | ↑ Buy | 1,296,296 | $13.50 | $17.5M | Indirect | Mar 17, 2025 (4d) |
| Feb 10, 2025 | SION | ↑ Buy | 1,125,000 | $18.00 | $20.3M | Indirect | Feb 10, 2025 (0d) |
| Oct 28, 2024 | SEPN | ↑ Buy | 4,170,000 | $18.00 | $75.1M | Indirect | Oct 30, 2024 (2d) |
| Sep 16, 2024 | BCAX | ↑ Buy | 1,833,000 | $18.00 | $33.0M | Indirect | Sep 18, 2024 (2d) |
| Jul 22, 2024 | ARTV | ↑ Buy | 8,333,333 | $12.00 | $100.0M | Indirect | Jul 24, 2024 (2d) |
| Jun 27, 2024 | ELYM | ↑ Buy | 13,008,546 | $3.84 | $50.0M | Indirect | Jul 1, 2024 (4d) |
| Feb 14, 2023 | MLYS | ↑ Buy | 1,250,000 | $16.00 | $20.0M | Indirect | Feb 16, 2023 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other BBTX insiders
Open-market trades in the last 12 months
About RA Capital Nexus Fund III, L.P.'s insider trades
RA Capital Nexus Fund III, L.P. is a director at Bambusa Therapeutics (BBTX). Since Feb 14, 2023, it has reported 25 open-market purchases worth $930.1M and 5 sales worth $106.8M on SEC Form 4. In the last 12 months: 17 buys ($584.4M) and 4 sales ($92.0M).
Its filings also include grants and awards (25 filings), conversions (7 filings), other transactions (3 filings), option exercises (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every BBTX insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.