Bihua Chen serves as Executive at PROTEOSTASIS THERAPEUTICS, INC., where they oversee executive responsibilities. Since joining the company, Bihua Chen has executed 99 insider transactions totaling $286.5M, demonstrating a bullish approach to their equity position. Their most recent transaction on Jan 26, 2026 involved receiving (via award) 497,500 shares valued at $5.0M.
Bihua Chen currently holds 497,500 shares of PROTEOSTASIS THERAPEUTICS, INC. (PTI), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Bihua Chen has been a net buyer of PTI stock. They have purchased $282.4M and sold $4.1M worth of shares.
Bihua Chen's most recent insider trade was on Jan 26, 2026, when they sold 497,500 shares at $10.00 per share.
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| $N/A |
| Discretionary |
| Dec 11, 2025 | CRBP | $344.1K | Sale | 30,029 | $11.46 | Discretionary |
| Aug 11, 2025 | BBOT | $6.9M | Award | 639,110 | $10.72 | Discretionary |
| Aug 11, 2025 | BBOT | $60.0M | Award | 5,598,425 | $10.72 | Discretionary |
| Aug 11, 2025 | BBOT | $0 | Award | 1,905,046 | $N/A | Discretionary |
| Aug 11, 2025 | BBOT | $0 | Award | 1,762,760 | $N/A | Discretionary |
| Aug 11, 2025 | BBOT | $0 | Award | 284,571 | $N/A | Discretionary |
| Aug 11, 2025 | BBOT | $8.2M | Award | 760,496 | $10.72 | Discretionary |
| Aug 11, 2025 | BBOT | $0 | Option Exercise | 4,172,126 | $N/A | Discretionary |
| Aug 11, 2025 | BBOT | $0 | Disposition | 152,940 | $N/A | Discretionary |
| Mar 8, 2024 | CRBP | $1.2M | Purchase | 29,342 | $41.23 | Discretionary |
| Mar 8, 2024 | CRBP | $7.1M | Purchase | 156,597 | $45.26 | Discretionary |
| Mar 8, 2024 | CRBP | $407.3K | Purchase | 8,862 | $45.96 | Discretionary |
| Mar 8, 2024 | CRBP | $802.4K | Purchase | 18,548 | $43.26 | Discretionary |
| Mar 8, 2024 | CRBP | $2.8M | Purchase | 61,668 | $44.62 | Discretionary |
| Mar 8, 2024 | CRBP | $1.1M | Purchase | 24,983 | $42.25 | Discretionary |
| Mar 7, 2024 | CRBP | $4.2M | Purchase | 102,140 | $41.23 | Discretionary |
| Mar 7, 2024 | CRBP | $1.8M | Purchase | 46,799 | $37.82 | Discretionary |
| Mar 7, 2024 | CRBP | $420.1K | Purchase | 10,736 | $39.13 | Discretionary |
| Mar 7, 2024 | CRBP | $3.6M | Purchase | 90,325 | $39.99 | Discretionary |
| Feb 13, 2024 | HLXB | $9.0M | Purchase | 903,600 | $10.00 | Discretionary |
| Feb 13, 2024 | HLXB | $14.3M | Purchase | 1,427,040 | $10.00 | Discretionary |
| Feb 13, 2024 | HLXB | $693.6K | Purchase | 69,360 | $10.00 | Discretionary |
| Feb 13, 2024 | HLXB | $5.1M | Award | 509,000 | $10.00 | Discretionary |
| Jan 26, 2024 | CRBP | $602.2K | Purchase | 16,484 | $36.53 | Discretionary |
| Jan 26, 2024 | CRBP | $1.2M | Purchase | 32,295 | $35.83 | Discretionary |
| Jan 26, 2024 | CRBP | $1.1M | Purchase | 31,549 | $34.62 | Discretionary |
| Jan 26, 2024 | CRBP | $608.6K | Purchase | 18,055 | $33.71 | Discretionary |
| Jan 26, 2024 | CRBP | $125.5K | Purchase | 3,866 | $32.47 | Discretionary |