Upstream Bio, Inc. (UPB) Market Cap
Upstream Bio, Inc. (UPB) has a market capitalization of $415M, based on the latest available market data.
Financials updated after earnings reported 2025-09-30.
Sector: Healthcare
Industry: Biotechnology
Employees: 52
Exchange: NASDAQ Global Select
Headquarters: Waltham, MA, US
Website: https://upstreambio.com
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SEC Filings
| Type | Filing Date | Link |
|---|---|---|
| 8-K(Current Report (Material Events)) | 2/11/2026 | View Filing → |
| 8-K(Current Report (Material Events)) | 2/11/2026 | View Filing → |
| 4(Insider Transaction (Form 4)) | 1/6/2026 | View Filing → |
| 4(Insider Transaction (Form 4)) | 1/6/2026 | View Filing → |
| 4(Insider Transaction (Form 4)) | 1/6/2026 | View Filing → |
| 4(Insider Transaction (Form 4)) | 1/6/2026 | View Filing → |
| 4(Insider Transaction (Form 4)) | 1/6/2026 | View Filing → |
| SC 13G/A(SEC Filing) | 11/14/2025 | View Filing → |
| SC 13G/A(SEC Filing) | 11/14/2025 | View Filing → |
| S-3ASR(SEC Filing) | 11/5/2025 | View Filing → |
| 10-Q(Quarterly Report) | 11/5/2025 | View Filing → |
| 8-K(Current Report (Material Events)) | 11/5/2025 | View Filing → |
| SC 13G(SEC Filing) | 10/24/2025 | View Filing → |
| 8-K(Current Report (Material Events)) | 9/2/2025 | View Filing → |
| SC 13G/A(SEC Filing) | 8/6/2025 | View Filing → |
| 10-Q(Quarterly Report) | 8/6/2025 | View Filing → |
| 8-K(Current Report (Material Events)) | 8/6/2025 | View Filing → |
| 8-K(Current Report (Material Events)) | 6/12/2025 | View Filing → |
| 4(Insider Transaction (Form 4)) | 6/12/2025 | View Filing → |
| 4(Insider Transaction (Form 4)) | 6/12/2025 | View Filing → |
| 4(Insider Transaction (Form 4)) | 6/12/2025 | View Filing → |
| 4(Insider Transaction (Form 4)) | 6/12/2025 | View Filing → |
| 4(Insider Transaction (Form 4)) | 6/12/2025 | View Filing → |
| 4(Insider Transaction (Form 4)) | 6/12/2025 | View Filing → |
| 10-Q(Quarterly Report) | 5/6/2025 | View Filing → |
| 8-K(Current Report (Material Events)) | 5/6/2025 | View Filing → |
| ARS(SEC Filing) | 4/17/2025 | View Filing → |
| DEFA14A(SEC Filing) | 4/17/2025 | View Filing → |
| DEF 14A(SEC Filing) | 4/17/2025 | View Filing → |
| S-8(SEC Filing) | 3/12/2025 | View Filing → |
| 10-K(Annual Report) | 3/12/2025 | View Filing → |
| 8-K(Current Report (Material Events)) | 3/12/2025 | View Filing → |
| SC 13G(SEC Filing) | 2/14/2025 | View Filing → |
| SC 13G(SEC Filing) | 2/14/2025 | View Filing → |
| SC 13G(SEC Filing) | 2/13/2025 | View Filing → |
| SC 13G/A(SEC Filing) | 2/12/2025 | View Filing → |
| 4(Insider Transaction (Form 4)) | 2/7/2025 | View Filing → |
| 4(Insider Transaction (Form 4)) | 2/7/2025 | View Filing → |
| 4(Insider Transaction (Form 4)) | 2/7/2025 | View Filing → |
| 4(Insider Transaction (Form 4)) | 2/7/2025 | View Filing → |
| 4(Insider Transaction (Form 4)) | 2/7/2025 | View Filing → |
| 4(Insider Transaction (Form 4)) | 12/17/2024 | View Filing → |
| 3(Insider Initial Statement) | 12/17/2024 | View Filing → |
| SC 13G(SEC Filing) | 11/7/2024 | View Filing → |
| 10-Q(Quarterly Report) | 11/7/2024 | View Filing → |
| 8-K(Current Report (Material Events)) | 11/7/2024 | View Filing → |
| SC 13D(SEC Filing) | 10/22/2024 | View Filing → |
| SC 13G(SEC Filing) | 10/18/2024 | View Filing → |
| 4(Insider Transaction (Form 4)) | 10/17/2024 | View Filing → |
| 4(Insider Transaction (Form 4)) | 10/17/2024 | View Filing → |
| SC 13D(SEC Filing) | 10/17/2024 | View Filing → |
| 4(Insider Transaction (Form 4)) | 10/17/2024 | View Filing → |
| SEC STAFF LETTER(SEC Filing) | 10/17/2024 | View Filing → |
| 4(Insider Transaction (Form 4)) | 10/15/2024 | View Filing → |
| 4(Insider Transaction (Form 4)) | 10/15/2024 | View Filing → |
| 4(Insider Transaction (Form 4)) | 10/15/2024 | View Filing → |
| 4(Insider Transaction (Form 4)) | 10/15/2024 | View Filing → |
| 4(Insider Transaction (Form 4)) | 10/15/2024 | View Filing → |
| 4(Insider Transaction (Form 4)) | 10/15/2024 | View Filing → |
| 4(Insider Transaction (Form 4)) | 10/15/2024 | View Filing → |
| 8-K(Current Report (Material Events)) | 10/15/2024 | View Filing → |
| S-8(SEC Filing) | 10/11/2024 | View Filing → |
| 424B4(Prospectus (424B4)) | 10/11/2024 | View Filing → |
| EFFECT(SEC Filing) | 10/11/2024 | View Filing → |
| 3(Insider Initial Statement) | 10/10/2024 | View Filing → |
| 3(Insider Initial Statement) | 10/10/2024 | View Filing → |
| 3(Insider Initial Statement) | 10/10/2024 | View Filing → |
| 3(Insider Initial Statement) | 10/10/2024 | View Filing → |
| 3(Insider Initial Statement) | 10/10/2024 | View Filing → |
| 3(Insider Initial Statement) | 10/10/2024 | View Filing → |
| 3(Insider Initial Statement) | 10/10/2024 | View Filing → |
| 3(Insider Initial Statement) | 10/10/2024 | View Filing → |
| 3(Insider Initial Statement) | 10/10/2024 | View Filing → |
| 3(Insider Initial Statement) | 10/10/2024 | View Filing → |
| 3(Insider Initial Statement) | 10/10/2024 | View Filing → |
| 3(Insider Initial Statement) | 10/10/2024 | View Filing → |
| S-1MEF(SEC Filing) | 10/10/2024 | View Filing → |
| 3(Insider Initial Statement) | 10/10/2024 | View Filing → |
| CERT(Certification Filing) | 10/10/2024 | View Filing → |
| 8-A12B(Securities Registration (Section 12b)) | 10/8/2024 | View Filing → |
| CORRESP(SEC Filing) | 10/8/2024 | View Filing → |
| CORRESP(SEC Filing) | 10/8/2024 | View Filing → |
| S-1/A(SEC Filing) | 10/7/2024 | View Filing → |
| CORRESP(SEC Filing) | 9/30/2024 | View Filing → |
| CORRESP(SEC Filing) | 9/18/2024 | View Filing → |
| S-1(Securities Registration) | 9/18/2024 | View Filing → |
| UPLOAD(SEC Filing) | 8/20/2024 | View Filing → |
| DRSLTR(SEC Filing) | 8/9/2024 | View Filing → |
| DRS/A(SEC Filing) | 8/9/2024 | View Filing → |
| UPLOAD(SEC Filing) | 7/25/2024 | View Filing → |
| DRSLTR(SEC Filing) | 7/18/2024 | View Filing → |
| DRS/A(SEC Filing) | 7/18/2024 | View Filing → |
| SEC STAFF LETTER(SEC Filing) | 7/16/2024 | View Filing → |
| UPLOAD(SEC Filing) | 7/9/2024 | View Filing → |
| DRS(SEC Filing) | 6/12/2024 | View Filing → |
