RA CAPITAL MANAGEMENT, L.P.
Director, 10% Owner · Bambusa Therapeutics, Inc.
Every open-market stock purchase RA CAPITAL MANAGEMENT, L.P. has reported to the SEC on Form 4 that met our signal bar, parsed straight from the filings. This page tracks where those buys landed inside insider clusters and how the prices paid compare to where the stock trades now.
Where the buys stand today
- PBLSParabilis Medicines, Inc.
8 purchases totalling $430.7M at an average of $20.09 per share. See all insider buying in PBLS →
Avg price paid$20.09Latest price—Market capUnknown - ARTVArtiva Biotherapeutics, Inc.
18 purchases totalling $92.7M at an average of $10.72 per share. See all insider buying in ARTV →
Avg price paid$10.72Latest price—Market capUnknown - COAGHemab Therapeutics Holdings, Inc.
12 purchases totalling $55.3M at an average of $18.65 per share. See all insider buying in COAG →
Avg price paid$18.65Latest price—Market capUnknown - WVE+1.5% vs price paidWave Life Sciences Ltd.
4 purchases totalling $54.6M at an average of $6.23 per share; the stock last traded at $6.32. See all insider buying in WVE →
Avg price paid$6.23Latest price$6.32Market cap$1.2B - BBTXBambusa Therapeutics, Inc.
4 purchases totalling $46.6M at an average of $15.79 per share. See all insider buying in BBTX →
Avg price paid$15.79Latest price—Market capUnknown - MLYS+14.2% vs price paidMineralys Therapeutics, Inc.
One purchase totalling $30.0M at an average of $25.50 per share; the stock last traded at $29.12. See all insider buying in MLYS →
Avg price paid$25.50Latest price$29.12Market cap$2.6B - SIONSionna Therapeutics, Inc.
2 purchases totalling $20.3M at an average of $18.00 per share. See all insider buying in SION →
Avg price paid$18.00Latest price—Market cap$1.9B - EVMNEvommune, Inc.
2 purchases totalling $20.0M at an average of $16.00 per share. See all insider buying in EVMN →
Avg price paid$16.00Latest price—Market capUnknown - BCAX+80.7% vs price paidBicara Therapeutics Inc.
One purchase totalling $4.8M at an average of $16.00 per share; the stock last traded at $28.91. See all insider buying in BCAX →
Avg price paid$16.00Latest price$28.91Market cap$1.9B - TYRATyra Biosciences, Inc.
3 purchases totalling $1.7M at an average of $10.19 per share. See all insider buying in TYRA →
Avg price paid$10.19Latest price—Market capUnknown - ACETAdicet Bio, Inc.
3 purchases totalling $1.6M at an average of $7.17 per share. See all insider buying in ACET →
Avg price paid$7.17Latest price—Market capUnknown
Cluster participation
Qualifying buys grouped with other insiders buying the same stock — the pattern this site exists to catch.
- BBTXOct 30 – Nov 2, 20263 insiders$58.6M
- ARTVMay 11 – Jul 31, 20262 insiders$109.2M
- ARTVMay 11 – Jul 24, 20262 insiders$108.7M
- ARTVMay 11 – Jul 23, 20262 insiders$108.3M
- PBLSJun 11 – Jul 22, 20263 insiders$441.4M
- ARTVMay 11 – Jul 17, 20262 insiders$105.7M
- ARTVMay 11 – Jul 17, 20262 insiders$105.7M
- ARTVMay 11 – Jul 13, 20262 insiders$104.2M
- PBLSJun 11 – Jun 15, 20263 insiders$434.5M
- ARTVMay 11 – May 11, 20262 insiders$91.5M
- EVMNNov 7 – Nov 7, 20253 insiders$70.0M
- MLYSSep 4 – Sep 4, 20252 insiders$45.0M
- TYRAJun 4 – Jun 16, 20253 insiders$15.3M
- SIONFeb 10 – Feb 10, 20256 insiders$62.5M
All reported buys
| Date | Ticker | Shares | Price | Value | Filing |
|---|---|---|---|---|---|
| Nov 2, 2026 | BBTXcluster | 2,335,109 | $16.00 | $37.4M | SEC ↗ |
| Nov 2, 2026 | BBTXcluster | 164,891 | $16.00 | $2.6M | SEC ↗ |
| Oct 30, 2026 | BBTXcluster | 263,911 | $14.92 | $3.9M | SEC ↗ |
| Oct 30, 2026 | BBTXcluster | 189,909 | $14.23 | $2.7M | SEC ↗ |
| Jul 31, 2026 | ARTVcluster | 24,944 | $9.93 | $247.7K | SEC ↗ |
| Jul 29, 2026 | ARTVcluster | 20,824 | $9.99 | $208.0K | SEC ↗ |
| Jul 24, 2026 | ARTVcluster | 41,319 | $9.99 | $412.8K | SEC ↗ |
| Jul 23, 2026 | ARTVcluster | 59,880 | $9.96 | $596.4K | SEC ↗ |
| Jul 22, 2026 | ARTVcluster | 84,124 | $9.93 | $835.4K | SEC ↗ |
| Jul 22, 2026 | PBLScluster | 47,250 | $29.77 | $1.4M | SEC ↗ |
| Jul 21, 2026 | ARTVcluster | 120,582 | $9.55 | $1.2M | SEC ↗ |
| Jul 21, 2026 | PBLScluster | 21,696 | $27.96 | $606.6K | SEC ↗ |
| Jul 21, 2026 | PBLScluster | 37,723 | $30.00 | $1.1M | SEC ↗ |
| Jul 21, 2026 | PBLScluster | 6,504 | $29.17 | $189.7K | SEC ↗ |
| Jul 20, 2026 | PBLScluster | 98,433 | $27.13 | $2.7M | SEC ↗ |
| Jul 20, 2026 | PBLScluster | 32,987 | $27.72 | $914.4K | SEC ↗ |
| Jul 17, 2026 | ARTVcluster | 7,882 | $8.95 | $70.5K | SEC ↗ |
| Jul 16, 2026 | ARTVcluster | 152,472 | $8.93 | $1.4M | SEC ↗ |
| Jul 13, 2026 | ARTVcluster | 6,522 | $8.94 | $58.3K | SEC ↗ |
| Jul 13, 2026 | ARTVcluster | 6,552 | $8.94 | $58.6K | SEC ↗ |
| Jul 10, 2026 | ARTVcluster | 15,102 | $8.97 | $135.5K | SEC ↗ |
| Jun 25, 2026 | ARTVcluster | 31,000 | $8.88 | $275.3K | SEC ↗ |
| Jun 16, 2026 | 61,523 | $24.98 | $1.5M | SEC ↗ | |
| Jun 16, 2026 | ARTVcluster | 124,893 | $8.89 | $1.1M | SEC ↗ |
| Jun 15, 2026 | 6,146 | $24.89 | $153.0K | SEC ↗ | |
| Jun 15, 2026 | ARTVcluster | 15,414 | $8.99 | $138.6K | SEC ↗ |
| Jun 12, 2026 | ARTVcluster | 391,019 | $8.57 | $3.4M | SEC ↗ |
| Jun 11, 2026 | PBLScluster | 19,728,353 | $20.00 | $394.6M | SEC ↗ |
| Jun 11, 2026 | PBLScluster | 1,460,397 | $20.00 | $29.2M | SEC ↗ |
| Jun 11, 2026 | ARTVcluster | 548,580 | $7.91 | $4.3M | SEC ↗ |
| Jun 9, 2026 | ARTVcluster | 479,039 | $6.91 | $3.3M | SEC ↗ |
| May 12, 2026 | 6,387 | $24.90 | $159.0K | SEC ↗ | |
| May 11, 2026 | ARTVcluster | 6,510,416 | $11.52 | $75.0M | SEC ↗ |
| May 11, 2026 | 25,720 | $25.00 | $643.0K | SEC ↗ | |
| May 11, 2026 | 14,149 | $24.47 | $346.2K | SEC ↗ | |
| May 7, 2026 | 7,921 | $24.34 | $192.8K | SEC ↗ | |
| May 6, 2026 | 53,407 | $24.83 | $1.3M | SEC ↗ | |
| May 6, 2026 | 14,611 | $23.77 | $347.3K | SEC ↗ | |
| May 5, 2026 | 10,268 | $25.00 | $256.7K | SEC ↗ | |
| May 5, 2026 | 87,143 | $24.59 | $2.1M | SEC ↗ | |
| May 4, 2026 | 133,750 | $18.00 | $2.4M | SEC ↗ | |
| May 4, 2026 | 2,541,250 | $18.00 | $45.7M | SEC ↗ | |
| Mar 30, 2026 | 971,091 | $6.50 | $6.3M | SEC ↗ | |
| Mar 27, 2026 | 2,495,623 | $6.43 | $16.0M | SEC ↗ | |
| Mar 26, 2026 | 4,954,558 | $6.06 | $30.0M | SEC ↗ | |
| Mar 26, 2026 | 351,224 | $6.38 | $2.2M | SEC ↗ | |
| Feb 26, 2026 | 300,000 | $16.00 | $4.8M | SEC ↗ | |
| Feb 20, 2026 | 74,751 | $7.27 | $543.4K | SEC ↗ | |
| Feb 19, 2026 | 74,268 | $7.21 | $535.5K | SEC ↗ | |
| Feb 18, 2026 | 74,577 | $7.04 | $525.0K | SEC ↗ | |
| Nov 7, 2025 | EVMNcluster | 1,157,096 | $16.00 | $18.5M | SEC ↗ |
| Nov 7, 2025 | EVMNcluster | 92,904 | $16.00 | $1.5M | SEC ↗ |
| Sep 4, 2025 | MLYScluster | 1,176,470 | $25.50 | $30.0M | SEC ↗ |
| Jun 16, 2025 | TYRAcluster | 11,813 | $10.13 | $119.7K | SEC ↗ |
| Jun 13, 2025 | TYRAcluster | 120,167 | $10.20 | $1.2M | SEC ↗ |
| Jun 12, 2025 | TYRAcluster | 31,307 | $10.20 | $319.3K | SEC ↗ |
| Feb 10, 2025 | SIONcluster | 1,022,586 | $18.00 | $18.4M | SEC ↗ |
| Feb 10, 2025 | SIONcluster | 102,414 | $18.00 | $1.8M | SEC ↗ |
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About this data
Figures are parsed from RA CAPITAL MANAGEMENT, L.P.'s Form 4 filings on SEC EDGAR (CIK 1346824) and cover open-market purchases (transaction code P) — grants, option exercises, and sales are excluded, which is why totals here can differ from raw filing counts. Every row links to its source document.
This page is informational and reflects public filing data. It is not investment advice.