Companies · Biotechnology

Sutro Biopharma Inc

SOUTH SAN FRANCISCO · Biotechnology

Diligence memoA one-page analyst read on Sutro Biopharma Inc — recommendation, valuation, rhythm, risks.
$85.4M
Total raised · real
1
Rounds
0.4×
Latest step-up
Top 12%
Sector rank · raised
Series C
Latest stage · inferred · Thu May 24 2018 00:00:00 GMT+0000 (Coordinated Universal Time)

Sutro Biopharma Inc looks over-valued against its niche peers and is dormant on financing cadence.

Synthesized from the figures below est. — every claim rests on a number shown on this page. Valuation uses the biotech sector profile.

Analyst read est. — computed against this company's niche peers in the same era. Inputs shown; not a quoted figure.

Over-valued
  • Modeled value is 1.71× the median modeled value of Series C Biotechnology companies in 2016–2018 (41 peers) — value vs value, same stage and era.
Dormant
  • Last raise 8.1 yr ago; this sector typically re-raises about every 14 months.
  • Only one round on record and long silent — often defunct, acquired, or gone quiet.
Leadership

No named principal in this company's public records yet — see all operators below.

Explore how these operators interlock with other companies in the operator network.

Where it sits in Biotechnology

Sutro Biopharma Inc is one of 4293 Biotechnology companies tracked from SOUTH SAN FRANCISCO. By capital raised it ranks in the upper tier (ahead of 89% of sector peers), and among the largest by modeled valuation est..

Ranking is computed against this company's own sector cohort — reported capital is fact; valuation tiers are modeled.

pharma

As reported in public records reported — not modeled.

US
Jurisdiction
Rule 506(b)
Reg D exemption
8
Investors (latest)
2018-05-24
First sale
Amount raised vs valuation, by round

Solid bars are reported offering amounts reported; hatched bars are the modeled post-money valuation est. — both on one shared scale so you can read raise-vs-worth at each round directly. Use the toggles to overlay data labels and the niche-peer / market average value lines.

Amount raised · realModeled valuation · estCumulative funded · real
$0$1.3B$2.5B$3.8B$5.0BSeries C · 2018-05-24 Raised $85M (real) Modeled valuation $3.5B (est)$85M$3.5BSeries C2018Series B · 2018-05-24 Raised $32M (real) Modeled valuation $1.3B (est)$32M$1.3BSeries B2018+$32MCumulative $117M

The line shows cumulative reported funding over the period; + labels show new capital added between points when there is room. Toggle on-bar figures, plus the niche-peer and market averages, to read this company against its cohort. Benchmarks are modeled medians.

Financing ladder & sequence gaps
Series C$85.4M · 2018
Bridge · Series C-stage$31.6M · 2018smaller follow-on

Stages are modeled from round size (public records carry no series label). No record for: Pre-Seed, Seed, Series A — the company may have raised it under a different exemption, merged it into an adjacent record, or skipped it. Sequence completeness: 40%.

Modeled valuation trajectory
$3.5B
Base estimate est.
$264.1M
Conservative case
$9.2B
Upside case
$569.2M
Modeled post-money

Round size and date are reported; the stage label is inferred from round size (latest is Series Ca $40M–$100M round). Valuation is modeled from stage benchmarks scaled by the biotech sector profile. Directional, not a quoted figure.

Series C · modeled $3.5B · 2018-05-242018Series B · modeled $1.3B · 2018-05-242018
Model inputs · modeled:benchmark-stage-stepup-v1
15%
Dilution assumption
Implied ownership sold in the financing.
62%
Survival probability
46% low · 72% high
1.46×/yr
Annual markup
1.68×/yr upside case
6.0 yr
Elapsed time used
8.1 yr actual, capped for stale marks
biotech
Sector profile
Adjusts growth and survival by industry.
Financing rhythm
0 mo
Avg between rounds
Capital velocity
8.1 yr
On record since
2018
First round
2
Rounds on file
How it compares to the market

Benchmarked against 4293 companies in Biotechnology. Each bar is a median (the middle company, not an average — outliers don't skew it). Two yardsticks: real money raised (reported on Form D) and modeled value (our estimate est.). These are whole-sector medians across all stages, except the per-stage row.

Total raised — vs sector median (real $, all stages) 12× above median
This company$85.4M
Sector median$7.2M
Latest round — vs other Series C rounds in sector (real $, this stage) 0.7× of median
This company$31.6M
Sector median$46.5M
Modeled value — vs sector median (estimate, all stages) 54× above median
This company$3.5B
Sector median$64.2M

Raised more than 89% of sector peers (real $). Modeled value above 98% of peers (estimate).

Niche peers — same stage & era

A tighter cohort than the sector chart above — only companies at the same stage (Series C) that last raised in the same ~3-year era, ranked by modeled value est. (not money raised). This is the exact set the analyst read compares against, so a like-for-like cohort is what makes "over/under-valued" meaningful. This company ranks #6 of 41.

This companyCohort peer
$1.0B$10.0B$10.0M$100.0M$1.0BCapital raised (log)Genesis Biopharma, Inc · Series C Raised $131.5M · modeled $4.1B (est)Alder Biopharmaceuticals Inc · Series C Raised $100.0M · modeled $4.1B (est)Ideaya Biosciences, Inc. · Series C Raised $111.4M · modeled $3.9B (est)Stoke Therapeutics, Inc. · Series C Raised $90.8M · modeled $3.7B (est)4D Molecular Therapeutics Inc · Series C Raised $108.6M · modeled $3.7B (est)Evelo Biosciences, Inc. · Series C Raised $131.5M · modeled $3.3B (est)Celularity Inc. · Series C Raised $117.7M · modeled $3.2B (est)Codiak BioSciences, Inc. · Series C Raised $107.5M · modeled $3.1B (est)Arcturus Therapeutics Ltd. · Series C Raised $67.8M · modeled $2.8B (est)Celldex Therapeutics, Inc. · Series C Raised $64.5M · modeled $2.6B (est)Micell Technologies Inc · Series C Raised $62.1M · modeled $2.5B (est)Sutro Biopharma Inc (this company) Raised $85.4M · modeled $3.5B (est)Sutro Biopharma Inc
CompanyStageRaised · realValue · estvs peer med.
Genesis Biopharma, IncSeries C$131.5M$4.1B2.00×
Alder Biopharmaceuticals IncSeries C$100.0M$4.1B2.00×
Ideaya Biosciences, Inc.Series C$111.4M$3.9B1.88×
Stoke Therapeutics, Inc.Series C$90.8M$3.7B1.80×
4D Molecular Therapeutics IncSeries C$108.6M$3.7B1.80×
Sutro Biopharma Inc this companySeries C$85.4M$3.5B1.71×
Evelo Biosciences, Inc.Series C$131.5M$3.3B1.63×
Celularity Inc.Series C$117.7M$3.2B1.55×
Codiak BioSciences, Inc.Series C$107.5M$3.1B1.53×
Arcturus Therapeutics Ltd.Series C$67.8M$2.8B1.36×
Celldex Therapeutics, Inc.Series C$64.5M$2.6B1.25×
Micell Technologies IncSeries C$62.1M$2.5B1.24×
Full financing history

Stage is inferred from round size est., not reported on the filing — a round's dollar size maps to a bucket: Pre-Seed <$1.0M · Seed $1.0M–$4.0M · Series A $4.0M–$15M · Series B $15M–$40M · Series C $40M–$100M · Series D+ $100M–$400M · Growth/Late >$400M.

StageAmount · realAnnouncedPost-money · estValue · estConf.
Series C$85.4M2018-05-24$569.2M$3.5B90%
Series B$31.6M2018-05-24$175.7M$1.3B90%
What happened at each round

Step-up, pace versus the sector's normal cadence, and revenue/exemption moves — read straight from the reported round facts reported.

  1. Series C$85.4M2018-05-24
    • First recorded raise — entered as Series C.
    • 15 investors on this round.
  2. Series B$31.6M2018-05-24
    • Filed alongside the prior round (same month) — likely a tranche or amendment.
    • Round 2.7× smaller than the prior — bridge or down round.
    • 8 investors on this round.
Intelligence
Modeled next raise
$31.6M
Modeled next size est.range $31.6M$50.6M
0.4×
Last step-up
Capital velocity

Predictive signals are modeled est. from this company's own cadence and step-up, plus sector benchmarks — directional, not advice. Peer set and a CSV export live in your analyst workspace.

Key people & operators

Officers, directors and promoters named in this company's public recordsreported — the people who run it (not its investors). "Also runs" counts come from name-matching across all records, so verify before acting.

PersonRoleAlso runsTied since
John G. Freund5 other2018-05
William J. Newell2 other2018-05
Armen G. Shanafelt1 other2018-05
Armen Bryan Shanafelt2018-05
Bryan G. Lawlis2018-05
Daniel Bryan Petree2018-05
Daniel J. Janney2018-05
Joseph Bryan Lobacki2018-05
Joseph G. Lobacki2018-05
Michael Bryan Dybbs2018-05
Michael Bryan Ross2018-05
Michael G. Ross2018-05
Virgil Bryan Lawlis2018-05
Registry & provenance

Sutro Biopharma Inc is an official record sourced from the U.S. Securities and Exchange Commission (SEC). U.S. data is aggregated from SEC Form D filings.

United States
Country of record
US
Jurisdiction
1382101
SEC CIK
Similar companies

Nearest neighbours across the whole database — matched on sector, stage and capital scale, and on shared operators (officers or directors named at both companies in public filings). A discovery shortlist, not a valuation cohort — verify before acting, the same way modeled figures are directional.

CompanySectorStageRaised · realValue · estWhy similar
Symic Holdings, LLCBiotechnologySeries B$72.4M$1.2Bnetwork1 shared operator · same sector
Proteon Therapeutics IncBiotechnologySeries B$71.1M$873.2Mnetwork1 shared operator · same sector
Verge Analytics, Inc.BiotechnologySeries C$85.0M$2.4Bsame sector · same stage
Rezolute, Inc.BiotechnologySeries C$85.0M$1.5Bsame sector · same stage
Torque Therapeutics, Inc.BiotechnologySeries C$84.3M$1.6Bsame sector · same stage
Therini Bio, Inc.BiotechnologySeries C$84.2M$1.1Bsame sector · same stage
Insmed IncBiotechnologySeries C$83.7M$3.4Bsame sector · same stage
Decibel Therapeutics, Inc.BiotechnologySeries C$87.1M$2.0Bsame sector · same stage
Semantically similar

Matched by meaning, not labels — a local language model reads each company's name, sector and description and ranks the closest in that learned space. This catches look-alikes that cross sector boundaries; the structured list above explains its matches, this one trusts the text. Directional, like every modeled signal here.

CompanySectorStageValue · estMatch
SutroVax, Inc.BiotechnologySeries D+$4.5B89%
Tasca Therapeutics CorpBiotechnologySeries C$372.7M83%
Suono Bio, Inc.BiotechnologySeries A$4.0M83%
Cesca Therapeutics Inc.BiotechnologySeries A$29.3M83%
Statera Biopharma, Inc.BiotechnologySeries B$8.4M83%
First Wave BioPharma, Inc.BiotechnologySeries B$13.4M82%
Sycamore Biopharma, Inc.BiotechnologyPre-Seed$6.4M82%
Umoja Biopharma, Inc.BiotechnologySeries D+$6.3B82%
Frequently asked
How much funding has Sutro Biopharma Inc raised?
Sutro Biopharma Inc has raised approximately $85.4M in disclosed capital across 1 recorded financing round, aggregated from public filings.
What is Sutro Biopharma Inc's estimated valuation?
Provath's modeled valuation for Sutro Biopharma Inc is approximately $3.5B (modeled range $264.1M–$9.2B). This is an algorithmic estimate derived from round sizes and same-niche peers — not a quoted or reported figure.
What funding stage is Sutro Biopharma Inc at?
Sutro Biopharma Inc's latest modeled financing stage is Series C. Its most recent recorded round closed around Thu May 24.
What does Sutro Biopharma Inc do and where is it based?
Sutro Biopharma Inc operates in the Biotechnology sector, based in SOUTH SAN FRANCISCO.
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