UnannouncedVCRaise

Filed before 2025Filed 4 January 2018

FLX Bio, Inc. raised $29.9M

FLX Bio, Inc., a biotech company based in South San Francisco, CA, raised $29.9M in a new equity round, according to a filing dated 4 January 2018.

Raises filed before 2025 are not checked for a public announcement.

Filed
4 January 2018
Round
Equity round
Amount sold
$29.9M
Offering size
$59.9M
Investors so far
10
Based in
South San Francisco, CA

Investors on the board

Firms come from the venture funds whose filings name a director of this company.

Who is on the board

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How it compares

Larger than 85% of the 1,729 tracked raises with an amount filed in 2018, and than 70% of the 160 in biotech.

RAPT Therapeutics, Inc. in public filings

FiledFilingSoldRaise
20 Jun 2019Amended filing$37.1MAnother raise
2 Jan 2019New filing$22.6MAnother raise
4 Jan 2018New filing$29.9MThis raise
5 May 2016New filing$50MAnother raise

Everything on RAPT Therapeutics, Inc.

More with Westlake BioPartners on the board

  1. Arpeggio Biosciences, Inc.$20MUnannounced · 297 days24 Nov 2025 · Boulder, CO
  2. Latigo Biotherapeutics, Inc.$50MAnnounced 32 days later13 Feb 2025 · Thousand Oaks, CA
  3. Arsenal Biosciences, Inc.$325MFiled before 20254 Sep 2024 · South San Francisco, CA
  4. Portal Instruments, Inc.$7MFiled before 202529 Apr 2022 · Cambridge, MA

All 43 raises

Other unannounced rounds

  1. DVx Atomic Co.$18.5MUnannounced · 1 day16 Sep 2026 · Boston, MA
  2. Aperio Systems, Inc.$1.6MUnannounced · 1 day16 Sep 2026 · Boston, MA
  3. Twin Health, Inc.$59MUnannounced · 1 day16 Sep 2026 · Menlo Park, CA
  4. Scoring Factory AI Inc.$500KUnannounced · 2 days15 Sep 2026 · New York, NY
  5. Royal & Pelham, Inc.$5.4MUnannounced · 2 days15 Sep 2026 · New Orleans, LA
  6. SPECTRA Holdings US, Ltd.$2.5MUnannounced · 2 days15 Sep 2026 · Sandy Springs, GA

All unannounced rounds

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