Diligence memo · auto-generated · as of July 2, 2026
Photoswitch Biosciences, Inc.
Photoswitch Biosciences, Inc. looks fair against its niche peers and is dormant on financing cadence.
Businessfiled
Photoswitch Biosciences, Inc. operates in Biotechnology, based in MENLO PARK.
No verified homepage on file yet — operating evidence is limited to the public record.
Capital & rounds (filed)filed
Photoswitch Biosciences, Inc. has raised $1.5M in disclosed capital across 2 recorded rounds, aggregated from public filings. Its latest round is modeled as Pre-Seed (a round under $1.0M).
Largest single filing: $1000K on 2017-09-27.
Most recent recorded round closed around 2018-03-16.
Valuation (modeled)modeled
Provath models Photoswitch Biosciences, Inc. at approximately $28M (range $267K–$313M). This is an algorithmic estimate from round sizes and same-niche peers — not a quoted or reported figure.
Read: Fair. Modeled value is 1.31× the median modeled value of Pre-Seed Biotechnology companies in 2016–2018 (152 peers) — value vs value, same stage and era. Within the normal band (131% of peer median) for its niche.
Financing rhythm & timingmixed
Historic cadence: a new round about every 6 months.
Last raise 8.3 yr ago; this sector typically re-raises about every 14 months.
Silent for over 3× the sector's normal cadence.
The last round was 2.0× smaller than the prior — a bridge or down round.
Comparablesmixed
Capital scale ranks ahead of 23% of Biotechnology peers (4293 compared).
Modeled value ranks above 34% of those peers.
Closest niche peers: New Vital Signs, Inc., Cerebral Magnetics INC, NutriBand Inc., Jivana Biotechnology Inc, AnTolRx, Inc..
Peoplefiled
4 named people on file across officers, directors and signatories.
Risks & flagsmixed
Financing has been silent well beyond sector cadence — possibly defunct, acquired, or paused.
No clearly named CEO/founder/principal in the surfaced records — key-person evidence is thin.