Upstream Bio, Inc.

UPB

Healthcare Biotechnology

Upstream Bio, Inc.’s revenue for fiscal 2025 (year ended December 2025) was $2.9 million, up 20.4% from fiscal 2024.

Revenue
−17.5%
EPS
+1.35%
Free cash flow
+9.33%

Quarter to June 2026, against a year earlier

3.23 0.02 +0.62%
Market cap
$176.9M
P/E
n/m
Fwd P/E
n/m
Dividend yield
—
F-score
2/9
Net debt / EBITDA
2.1×
Dividend safety
n/a

Insider Decisions last twelve months

Net sold
$104.8K
Trades
15 sells · 0 buys
Ownership
36.2%

Capital & Financial Ratios $m

Size
Market Cap 177
Revenue ttm 3
Net income ttm (156)
Free cash flow ttm (136)
Net debt Q (261)
Valuation
P/E n/m
Forward P/E n/m
Price / sales 55.8 (above 10: high)
Forward P/S Powerpack
Price / FCF n/m
Price / book 0.7
Financial health
Current ratio Q 28.0 (at or above 1.5: strong)
Debt / equity Q n/m
Interest coverage Q —
Growth
Revenue growth Q −17.5% (below 0%: shrinking)
Operating income growth Q +4.5% (above 0%: growing)
EPS, this year −8.1% (below 0%: weak)
EPS, next year A +3.9%
Revenue, next year A −5.2% (below 0%: weak)
EPS, past 5 yrs —
EPS, next 5 yrs A −2.7% (below 0%: weak)

Green and red mark values outside typical ranges; (Q) is the latest quarter, (A) analysts’ estimates; n/m is not meaningful, as a P/E on a loss. How we judge →

Valuation vs history

Dividends

Yield
—
Annual rate
—
Payout ratio
—

Assets vs Liabilities $m

2023 2024 2025 Q'26
Cash 110 470 342 261
Receivables 0 1 1 1
Inventory — — — —
Other — — — —
117 479 352 280
2023 2024 2025 Q'26
Payables 2 4 3 2
ST’ Debt — — — —
Other — — — —
7 11 13 10

Compound Annual Growth %

10y 5y 3y
Sales — — —
Cash Flow — — —
Earnings — — —
Book Value — — —

Earnings Trends EPS, adjusted, against the consensus

EPS $

Mar Jun Sep Dec Year
’26 (0.75) (0.73) — — —
’25 (0.51) (0.74) (0.63) (0.79) (2.66)
’24 (4.68) (6.50) (6.96) (0.48) (5.58)
Fiscal quarters ending in the months shown.

Revenue $m

Mar Jun Sep Dec Year
’26 1 1 — — —
’25 1 1 1 1 3
’24 1 1 1 1 2
Fiscal quarters ending in the months shown.

Operating Cash Flow $m

Mar Jun Sep Dec Year
’26 (48) (36) — — —
’25 (41) (39) (22) (31) (133)
’24 (18) (8) (14) (20) (59)
Fiscal quarters ending in the months shown.

Free Cash Flow $m

Mar Jun Sep Dec Year
’26 (48) (36) — — —
’25 (41) (39) (22) (31) (133)
’24 (18) (8) (14) (20) (60)
Fiscal quarters ending in the months shown.

Target Price Range

Analyst price targets

Recommendation Rating

1.5
1Buy 2 3Hold 4 5Sell

Ten years at a glance Fiscal years to December

Ten-year view Analyst estimates Powerpack
Group Line 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 TTM Jun ’26 Trend 10 yrs 2026e 2027e 2028e Next 3/yr
Income, $m
Income, $m Revenue — — — — — — — 2 2 3 3 +9.5% 3 1 1 (25.8%)
Gross margin, % — — — — — — — 100.00 100.00 100.00 100.00 0.0 pt
EBT — — — — — — — (21) (63) (143) (156) +164.3%
EBT margin, % — — — — — — — (862.90) (2,650.04) (5,026.03) (4,955.67) (4,163.1) pt
Net income — — — — — — — (21) (63) (143) (156) +164.3%
Per share, $
Per share, $ Revenue — — — — — — — 0.81 0.17 0.05 0.06 (74.4%)
Earnings — — — — — — — (12.95) (5.58) (2.66) (2.90) (54.7%)
Cash flow — — — — — — — (12.84) (4.32) (2.47) (2.50) (56.1%)
Capex — — — — — — — (0.05) (0.04) 0.00 0.00 (74.8%)
Free cash flow — — — — — — — (12.89) (4.36) (2.48) (2.50) (56.2%)
Book value — — — — — — — 36.50 34.34 6.31 4.97 (58.4%)
Shares, m — — — — — — — 3 14 54 54 +327.0%
Valuation, ×
Valuation, × P/E — — — — — — — 0.00 0.00 0.00 0.00 0.0
P/S — — — — — — — 27.97 317.02 512.30 55.81 285.8
P/B — — — — — — — 0.00 1.60 4.30 0.65 2.0
EV/Sales — — — — — — — (64.82) 118.52 392.64 (26.93) 148.8
EV/FCF — — — — — — — 2.77 (4.69) (8.39) 0.62 (3.4)
Cash, $m
Cash, $m Operating cash flow — — — — — — — (38) (59) (133) (136) +87.5%
Capex — — — — — — — 0 (1) 0 0 +7.0%
Free cash flow — — — — — — — (38) (60) (133) (136) +87.2%
Balance, $m
Balance, $m Working capital — — — — — — — 110 468 338 270 +75.0%
Net debt — — — — — — — (110) (470) (342) (261) +76.4%
Shareholders’ equity — — — — — — — 108 470 340 271 +77.5%
Returns, %
Returns, % ROA — — — — — — — 0.00 (25.51) (34.34) (44.61) (34.3) pt
ROIC — — — — — — — 0.00 0.00 0.00 (1,100.93) 0.0 pt
ROE — — — — — — — 0.00 (44.07) (35.43) (46.05) (35.4) pt
People
People Employees — — — — — — — 38 52 75 — +40.5%
Revenue/emp, $m — — — — — — — 0.06 0.05 0.04 — (22.1%)
Negative figures in brackets.
estimates

All 10 years →

Fiscal years to Dec 2025 · latest quarter Jun 2026 · fundamentals updated 26 Oct 2026

Upstream Bio, Inc. vs peers in Biotechnology (Q) = latest quarter vs a year earlier

Company Market cap P/E Fwd P/E Revenue growth (Q) EPS growth (Q) FCF growth (Q) Gross margin (Q) EBIT margin (Q) Compare
TRDA Entrada Therapeutics, Inc. $191.5M — (loss-making) — (loss-making) −43.93% (below 0%: shrinking) n/m −7.05% (below 0%: shrinking) 100.00% (4,606.52%) Compare
CGEN Compugen Ltd. $185.7M 5.2× — (loss-making) +107.00% (above 0%: growing) n/m −155.42% (below 0%: shrinking) (3.54%) (339.62%) Compare
MDWD MediWound Ltd. $184.0M — (loss-making) — (loss-making) −45.83% (below 0%: shrinking) n/m −49.90% (below 0%: shrinking) 10.90% (305.89%) Compare
BCYC Bicycle Therapeutics PLC Sponsored ADR $182.5M — (loss-making) — (loss-making) +190.24% (above 0%: growing) n/m +43.48% (above 0%: growing) 100.00% (39.57%) Compare
ACOG Alpha Cognition Inc. $180.5M — (loss-making) — (loss-making) +267.56% (above 0%: growing) n/m −109.25% (below 0%: shrinking) 94.80% (127.29%) Compare
WHWK Whitehawk Therapeutics, Inc. $178.4M — (loss-making) — (loss-making) +33.48% (above 0%: growing) n/m +72.57% (above 0%: growing) 89.36% 0.00% Compare
UPB Upstream Bio, Inc. $176.9M — (loss-making) — (loss-making) −17.50% (below 0%: shrinking) n/m +9.33% (above 0%: growing) 100.00% (5,480.98%)
IVVD Invivyd, Inc. $166.0M — (loss-making) — (loss-making) +21.20% (above 0%: growing) n/m −226.89% (below 0%: shrinking) 91.09% (320.76%) Compare
BBOT BridgeBio Oncology Therapeutics, Inc $163.6M — (loss-making) — — n/m −88.78% (below 0%: shrinking) — 0.00% Compare
Median of peers $181.5M — — +33.48% — −69.34% 91.09% (216.59%)

All 621 Biotechnology stocks →

Pay and ownership Proxy statement filed 16 April 2026

Ownership

Directors and executive officers, together 16.46%
FMR LLC 14.58%
Erez Chimovits, M.B.A., M.Sc. 10.52%
Entities affiliated with OrbiMed 10.46%
AI Upstream LLC 10.10%
Decheng Capital Global Life Sciences Fund IV, L.P. 6.04%
Norges Bank 5.30%
Ownership is the proxy’s own table: the directors and officers as a group, and every holder of 5% or more. Read the proxy statement

Upstream Bio, Inc. (UPB) Latest News

12 Feb

Impact 4 · · clinicaltrialsarena.com

25 Nov

4 Oct

Impact 3 · · Simply Wall St.Insider MonkeySimply Wall St.Simply Wall St.Simply Wall St.Simply Wall St.Simply Wall St.Simply Wall St.

30 Sep

Impact 4 · · GlobeNewswireClinical Trials ArenaMT NewswiresInsider MonkeyClinical Trials ArenaMT NewswiresTipRanksSimply Wall St.

20 Aug

stockrow.com/UPB · Data as of Oct 26, 2026 · For information only; not investment advice. · © 2026 stockrow.com