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Upstream Bio, Inc.

For the period ended Mar 31, 2026. Filed May 13, 2026.

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About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Mar 31, 2026 · Filed May 13, 2026

UPB$3.38-5.6%Stored close · as of Nov 10, 2026

Extracted filing text, with the paragraph anchors used by the comparison.

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Condensed Consolidated Statements of Cash Flows

(Amounts in thousands)

Three Months Ended March 31,
20262025
Cash flows from operating activities:
Net loss$(40,591)$(27,270)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense4943
Stock-based compensation expense4,6472,635
Net amortization of premiums and accretion of discounts on short-term investments(754)(1,735)
Non-cash lease expense151134
Changes in operating assets and liabilities:
Accounts receivable(366)47
Prepaid expenses and other assets(11,046)(13,745)
Accounts payable(1,016)711
Accrued expenses and other current liabilities1,229(1,851)
Operating lease liabilities(155)(134)
Net cash used in operating activities(47,852)(41,165)
Cash flows from investing activities:
Purchases of short-term investments(14,422)(266,056)
Maturities of short-term investments56,82252,675
Net cash provided by (used in) investing activities42,400(213,381)
Cash flows from financing activities:
Payments of initial public offering costs—(34)
Proceeds from exercises of stock options598—
Net cash provided by (used in) financing activities598(34)
Net decrease in cash, cash equivalents and restricted cash(4,854)(254,580)
Cash, cash equivalents and restricted cash at beginning of period101,772326,086
Cash, cash equivalents and restricted cash at end of period$96,918$71,506
Cash, cash equivalents and restricted cash at end of period:
Cash and cash equivalents$96,724$71,312
Restricted cash194194
Total cash, cash equivalents and restricted cash at end of period$96,918$71,506
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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.