Latest 10-Q

What changed in Upstream Bio, Inc.'s latest quarterly report, compared with the one before.

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Insider trades

Open-market trades from Form 4. 10b5-1 marks a plan set in advance.Open-market buys and sales by officers, directors and 10% owners, from SEC Form 4. A plan set in advance is marked 10b5-1.

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13F holders

Funds that report this stock, checked against market prices.Fund managers with over $100 million in US-listed stocks file a 13F each quarter, up to 45 days after quarter end. Long positions only.

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Trades by members of Congress

Disclosed in dollar ranges, up to 45 days after the trade.Members of Congress, their spouses and dependent children report trades in dollar ranges, up to 45 days after the trade.

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Lobbying

What Upstream Bio, Inc. and its lobbying firms report each quarter.A company that lobbies with its own staff reports its expenses; a lobbying firm it hires reports the income it received. We count both.

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Institutional ownership over time

How many funds reported holding the stock at the end of each quarter, and how many shares they held between them.

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More filings and data

Each opens the table.

About the company

The basics from the company’s SEC registration.

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$2.78−$0.08 (−2.80%) Nov 13 close
Oct 13, 2026: $3.55Oct 14, 2026: $3.42Oct 15, 2026: $3.37Oct 16, 2026: $2.76Oct 19, 2026: $2.80Oct 20, 2026: $2.82Oct 21, 2026: $2.80Oct 22, 2026: $2.99Oct 23, 2026: $2.74Oct 26, 2026: $2.75Oct 27, 2026: $2.79Oct 28, 2026: $2.98Oct 29, 2026: $3.27Oct 30, 2026: $3.41Nov 2, 2026: $3.35Nov 3, 2026: $3.39Nov 4, 2026: $3.70Nov 5, 2026: $3.21Nov 6, 2026: $3.23Nov 9, 2026: $3.58Nov 10, 2026: $3.38Nov 11, 2026: $3.20Nov 12, 2026: $2.86Nov 13, 2026: $2.78
Oct 13, 2026Low $2.74 · High $3.70Nov 13, 2026
Aug 13, 2026: $6.91Aug 14, 2026: $7.07Aug 17, 2026: $7.14Aug 18, 2026: $6.85Aug 19, 2026: $7.52Aug 20, 2026: $6.85Aug 21, 2026: $6.97Aug 24, 2026: $6.61Aug 25, 2026: $7.18Aug 26, 2026: $7.13Aug 27, 2026: $6.79Aug 28, 2026: $6.69Aug 31, 2026: $6.62Sep 1, 2026: $6.55Sep 2, 2026: $6.48Sep 3, 2026: $6.08Sep 4, 2026: $6.01Sep 8, 2026: $6.19Sep 9, 2026: $5.96Sep 10, 2026: $5.75Sep 11, 2026: $5.73Sep 14, 2026: $5.81Sep 15, 2026: $5.48Sep 16, 2026: $5.33Sep 17, 2026: $5.31Sep 18, 2026: $5.34Sep 21, 2026: $5.37Sep 22, 2026: $5.49Sep 23, 2026: $5.19Sep 24, 2026: $5.17Sep 25, 2026: $5.36Sep 28, 2026: $5.30Sep 29, 2026: $5.19Sep 30, 2026: $5.27Oct 1, 2026: $5.04Oct 2, 2026: $5.04Oct 5, 2026: $4.85Oct 6, 2026: $4.59Oct 7, 2026: $4.61Oct 8, 2026: $4.55Oct 9, 2026: $4.70Oct 12, 2026: $4.17Oct 13, 2026: $3.55Oct 14, 2026: $3.42Oct 15, 2026: $3.37Oct 16, 2026: $2.76Oct 19, 2026: $2.80Oct 20, 2026: $2.82Oct 21, 2026: $2.80Oct 22, 2026: $2.99Oct 23, 2026: $2.74Oct 26, 2026: $2.75Oct 27, 2026: $2.79Oct 28, 2026: $2.98Oct 29, 2026: $3.27Oct 30, 2026: $3.41Nov 2, 2026: $3.35Nov 3, 2026: $3.39Nov 4, 2026: $3.70Nov 5, 2026: $3.21Nov 6, 2026: $3.23Nov 9, 2026: $3.58Nov 10, 2026: $3.38Nov 11, 2026: $3.20Nov 12, 2026: $2.86Nov 13, 2026: $2.78
Aug 13, 2026Low $2.74 · High $7.52Nov 13, 2026
Nov 13, 2025: $23.34Nov 14, 2025: $24.53Nov 17, 2025: $25.70Nov 18, 2025: $25.56Nov 19, 2025: $24.94Nov 20, 2025: $24.96Nov 21, 2025: $25.55Nov 24, 2025: $26.05Nov 25, 2025: $28.83Nov 26, 2025: $28.00Nov 28, 2025: $28.60Dec 1, 2025: $28.98Dec 2, 2025: $25.01Dec 3, 2025: $26.97Dec 4, 2025: $27.74Dec 5, 2025: $27.75Dec 8, 2025: $28.97Dec 9, 2025: $28.37Dec 10, 2025: $28.67Dec 11, 2025: $27.47Dec 12, 2025: $27.14Dec 15, 2025: $27.20Dec 16, 2025: $29.32Dec 17, 2025: $28.33Dec 18, 2025: $29.86Dec 19, 2025: $29.35Dec 22, 2025: $30.43Dec 23, 2025: $29.21Dec 24, 2025: $30.27Dec 26, 2025: $29.48Dec 29, 2025: $28.83Dec 30, 2025: $27.32Dec 31, 2025: $27.15Jan 2, 2026: $27.07Jan 5, 2026: $26.13Jan 6, 2026: $25.87Jan 7, 2026: $28.08Jan 8, 2026: $27.54Jan 9, 2026: $29.75Jan 12, 2026: $31.66Jan 13, 2026: $32.60Jan 14, 2026: $32.30Jan 15, 2026: $30.90Jan 16, 2026: $31.00Jan 20, 2026: $31.00Jan 21, 2026: $31.59Jan 22, 2026: $31.79Jan 23, 2026: $30.02Jan 26, 2026: $30.16Jan 27, 2026: $32.50Jan 28, 2026: $30.43Jan 29, 2026: $30.94Jan 30, 2026: $31.08Feb 2, 2026: $29.94Feb 3, 2026: $30.79Feb 4, 2026: $29.38Feb 5, 2026: $26.00Feb 6, 2026: $26.20Feb 9, 2026: $26.12Feb 10, 2026: $27.81Feb 11, 2026: $14.69Feb 12, 2026: $12.80Feb 13, 2026: $8.75Feb 17, 2026: $8.33Feb 18, 2026: $8.29Feb 19, 2026: $8.54Feb 20, 2026: $8.08Feb 23, 2026: $8.02Feb 24, 2026: $7.92Feb 25, 2026: $7.74Feb 26, 2026: $7.90Feb 27, 2026: $7.68Mar 2, 2026: $7.70Mar 3, 2026: $7.36Mar 4, 2026: $7.80Mar 5, 2026: $7.67Mar 6, 2026: $7.66Mar 9, 2026: $8.06Mar 10, 2026: $8.12Mar 11, 2026: $9.36Mar 12, 2026: $9.44Mar 13, 2026: $9.23Mar 16, 2026: $9.61Mar 17, 2026: $9.71Mar 18, 2026: $8.67Mar 19, 2026: $8.38Mar 20, 2026: $8.67Mar 23, 2026: $8.45Mar 24, 2026: $8.45Mar 25, 2026: $9.47Mar 26, 2026: $9.79Mar 27, 2026: $8.67Mar 30, 2026: $8.78Mar 31, 2026: $9.00Apr 1, 2026: $9.31Apr 2, 2026: $9.50Apr 6, 2026: $9.72Apr 7, 2026: $9.70Apr 8, 2026: $9.84Apr 9, 2026: $10.42Apr 10, 2026: $10.49Apr 13, 2026: $10.23Apr 14, 2026: $10.34Apr 15, 2026: $9.88Apr 16, 2026: $10.10Apr 17, 2026: $9.99Apr 20, 2026: $9.99Apr 21, 2026: $9.26Apr 22, 2026: $9.64Apr 23, 2026: $9.60Apr 24, 2026: $9.30Apr 27, 2026: $9.29Apr 28, 2026: $9.51Apr 29, 2026: $9.19Apr 30, 2026: $9.18May 1, 2026: $9.40May 4, 2026: $9.31May 5, 2026: $9.12May 6, 2026: $9.19May 7, 2026: $8.99May 8, 2026: $9.09May 11, 2026: $9.11May 12, 2026: $8.95May 13, 2026: $9.36May 14, 2026: $8.79May 15, 2026: $9.09May 18, 2026: $8.51May 19, 2026: $8.03May 20, 2026: $8.41May 21, 2026: $8.46May 22, 2026: $8.37May 26, 2026: $8.21May 27, 2026: $8.26May 28, 2026: $8.32May 29, 2026: $8.36Jun 1, 2026: $8.08Jun 2, 2026: $7.25Jun 3, 2026: $7.63Jun 4, 2026: $7.43Jun 5, 2026: $7.05Jun 8, 2026: $6.45Jun 9, 2026: $6.69Jun 10, 2026: $6.28Jun 11, 2026: $6.38Jun 12, 2026: $6.10Jun 15, 2026: $6.10Jun 16, 2026: $5.92Jun 17, 2026: $6.15Jun 18, 2026: $6.25Jun 22, 2026: $6.30Jun 23, 2026: $6.32Jun 24, 2026: $6.35Jun 25, 2026: $6.36Jun 26, 2026: $6.75Jun 29, 2026: $6.93Jun 30, 2026: $6.92Jul 1, 2026: $7.28Jul 2, 2026: $7.51Jul 6, 2026: $7.40Jul 7, 2026: $7.86Jul 8, 2026: $7.98Jul 9, 2026: $7.81Jul 10, 2026: $7.53Jul 13, 2026: $7.28Jul 14, 2026: $7.14Jul 15, 2026: $7.27Jul 16, 2026: $7.23Jul 17, 2026: $7.01Jul 20, 2026: $6.98Jul 21, 2026: $6.98Jul 22, 2026: $6.59Jul 23, 2026: $6.40Jul 24, 2026: $6.41Jul 27, 2026: $6.40Jul 28, 2026: $6.40Jul 29, 2026: $6.41Jul 30, 2026: $6.57Jul 31, 2026: $6.31Aug 3, 2026: $6.42Aug 4, 2026: $6.79Aug 5, 2026: $6.74Aug 6, 2026: $6.87Aug 7, 2026: $7.25Aug 10, 2026: $7.44Aug 11, 2026: $7.09Aug 12, 2026: $6.91Aug 13, 2026: $6.91Aug 14, 2026: $7.07Aug 17, 2026: $7.14Aug 18, 2026: $6.85Aug 19, 2026: $7.52Aug 20, 2026: $6.85Aug 21, 2026: $6.97Aug 24, 2026: $6.61Aug 25, 2026: $7.18Aug 26, 2026: $7.13Aug 27, 2026: $6.79Aug 28, 2026: $6.69Aug 31, 2026: $6.62Sep 1, 2026: $6.55Sep 2, 2026: $6.48Sep 3, 2026: $6.08Sep 4, 2026: $6.01Sep 8, 2026: $6.19Sep 9, 2026: $5.96Sep 10, 2026: $5.75Sep 11, 2026: $5.73Sep 14, 2026: $5.81Sep 15, 2026: $5.48Sep 16, 2026: $5.33Sep 17, 2026: $5.31Sep 18, 2026: $5.34Sep 21, 2026: $5.37Sep 22, 2026: $5.49Sep 23, 2026: $5.19Sep 24, 2026: $5.17Sep 25, 2026: $5.36Sep 28, 2026: $5.30Sep 29, 2026: $5.19Sep 30, 2026: $5.27Oct 1, 2026: $5.04Oct 2, 2026: $5.04Oct 5, 2026: $4.85Oct 6, 2026: $4.59Oct 7, 2026: $4.61Oct 8, 2026: $4.55Oct 9, 2026: $4.70Oct 12, 2026: $4.17Oct 13, 2026: $3.55Oct 14, 2026: $3.42Oct 15, 2026: $3.37Oct 16, 2026: $2.76Oct 19, 2026: $2.80Oct 20, 2026: $2.82Oct 21, 2026: $2.80Oct 22, 2026: $2.99Oct 23, 2026: $2.74Oct 26, 2026: $2.75Oct 27, 2026: $2.79Oct 28, 2026: $2.98Oct 29, 2026: $3.27Oct 30, 2026: $3.41Nov 2, 2026: $3.35Nov 3, 2026: $3.39Nov 4, 2026: $3.70Nov 5, 2026: $3.21Nov 6, 2026: $3.23Nov 9, 2026: $3.58Nov 10, 2026: $3.38Nov 11, 2026: $3.20Nov 12, 2026: $2.86Nov 13, 2026: $2.78
Nov 13, 2025Low $2.74 · High $32.60Nov 13, 2026
Congress purchase Congress sale Insider sale over $1M

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