IPOGrid
0001845459
IPO filing research

NKGen Biotech, Inc.

Biological Products, (No Diagnostic Substances)

follow-on priced 424B3

NKGen Biotech, Inc. IPO research page with SEC filing history, offering status, deal terms, structured filing extracts, company news, and comparable IPO context. Latest filing: 424B3 on 2025-03-04.

Filing Timeline

SEC EDGAR
424B3 priced
Final prospectus
Final prospectus filed near launch with final deal terms.
Follows 424B3 and confirms the priced prospectus.
2025-03-04 · 0001213900-25-020013
424B3 priced
Final prospectus
Final prospectus filed near launch with final deal terms.
Follows 424B3 and confirms the priced prospectus.
2024-09-13 · 0001213900-24-078235
424B3 priced
Final prospectus
Final prospectus filed near launch with final deal terms.
Follows EFFECT and confirms the priced prospectus.
2024-07-10 · 0001213900-24-060562
EFFECT effective
SEC effectiveness notice
SEC declared the registration statement effective, allowing the offering to proceed.
Follows S-1/A and marks the registration effective.
2024-07-08 · 9999999995-24-002089
S-1/A amended
Amended registration statement
Updated registration statement filed after SEC comments or deal changes.
Updates the prior S-1/A filing.
2024-06-27 · 0001213900-24-056687
S-1/A amended
Amended registration statement
Updated registration statement filed after SEC comments or deal changes.
Updates the prior S-1/A filing.
2024-05-13 · 0001213900-24-042376
S-1/A amended
Amended registration statement
Updated registration statement filed after SEC comments or deal changes.
Updates the prior S-1/A filing.
2023-12-15 · 0001104659-23-126438
S-1/A amended
Amended registration statement
Updated registration statement filed after SEC comments or deal changes.
Updates the prior S-1 filing.
2023-11-29 · 0001104659-23-122107
S-1 filed
Initial registration statement
Initial public filing submitted to start the SEC review process.
Follows CERT in the pre-IPO sequence.
2023-10-19 · 0001104659-23-110175
CERT inactive
CERT
Pre-IPO filing captured from the SEC submission timeline.
Follows 8-A12B in the pre-IPO sequence.
2023-09-29 · 0001354457-23-000716
8-A12B effective
Exchange Act registration
Registration filed to list the securities under the Exchange Act ahead of trading.
Follows 424B3 and registers the class of securities for exchange listing.
2023-09-29 · 0001104659-23-105182
424B3 priced
Final prospectus
Final prospectus filed near launch with final deal terms.
Follows 425 and confirms the priced prospectus.
2023-09-22 · 0001104659-23-103188
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2023-09-22 · 0001104659-23-103111
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 424B3 in the pre-IPO sequence.
2023-09-22 · 0001104659-23-103042
424B3 priced
Final prospectus
Final prospectus filed near launch with final deal terms.
Follows 425 and confirms the priced prospectus.
2023-09-22 · 0001104659-23-102900
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2023-09-19 · 0001104659-23-101924
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2023-09-18 · 0001104659-23-101419
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2023-09-14 · 0001104659-23-100653
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2023-09-11 · 0001104659-23-099540
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2023-08-30 · 0001104659-23-096678
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2023-08-24 · 0001104659-23-094749
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows EFFECT in the pre-IPO sequence.
2023-08-15 · 0001104659-23-091985
EFFECT effective
SEC effectiveness notice
SEC declared the registration statement effective, allowing the offering to proceed.
Follows 424B3 and marks the registration effective.
2023-08-14 · 9999999995-23-002371
424B3 priced
Final prospectus
Final prospectus filed near launch with final deal terms.
Follows S-4/A and confirms the priced prospectus.
2023-08-14 · 0001104659-23-091397
S-4/A amended
S-4/A
Pre-IPO filing captured from the SEC submission timeline.
Updates the prior 425 filing.
2023-08-10 · 0001104659-23-089714
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows S-4/A in the pre-IPO sequence.
2023-08-09 · 0001104659-23-089247
S-4/A amended
S-4/A
Pre-IPO filing captured from the SEC submission timeline.
Updates the prior 425 filing.
2023-08-04 · 0001104659-23-087899
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2023-07-26 · 0001104659-23-084160
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows S-4/A in the pre-IPO sequence.
2023-07-17 · 0001104659-23-081434
S-4/A amended
S-4/A
Pre-IPO filing captured from the SEC submission timeline.
Updates the prior 425 filing.
2023-07-17 · 0001104659-23-081363
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2023-07-06 · 0001104659-23-078599
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows S-4/A in the pre-IPO sequence.
2023-06-27 · 0001104659-23-075170
S-4/A amended
S-4/A
Pre-IPO filing captured from the SEC submission timeline.
Updates the prior 425 filing.
2023-06-26 · 0001104659-23-074785
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2023-06-05 · 0001104659-23-067872
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2023-06-01 · 0001104659-23-066757
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows S-4 in the pre-IPO sequence.
2023-05-17 · 0001104659-23-061566
S-4 filed
S-4
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2023-05-15 · 0001104659-23-060652
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2023-04-20 · 0001104659-23-047588
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2023-04-17 · 0001104659-23-045971
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2023-04-17 · 0001104659-23-045843
425 supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 424B4 in the pre-IPO sequence.
2023-03-24 · 0001104659-23-036618
424B4 priced
Final prospectus
Final prospectus filed after pricing with final deal terms.
Follows EFFECT and confirms the priced prospectus.
2021-05-24 · 0001104659-21-071299
EFFECT effective
SEC effectiveness notice
SEC declared the registration statement effective, allowing the offering to proceed.
Follows CERT and marks the registration effective.
2021-05-20 · 9999999995-21-002033
CERT inactive
CERT
Pre-IPO filing captured from the SEC submission timeline.
Follows 8-A12B in the pre-IPO sequence.
2021-05-20 · 0000876661-21-000738
8-A12B effective
Exchange Act registration
Registration filed to list the securities under the Exchange Act ahead of trading.
Follows S-1/A and registers the class of securities for exchange listing.
2021-05-19 · 0001104659-21-069174
S-1/A amended
Amended registration statement
Updated registration statement filed after SEC comments or deal changes.
Updates the prior S-1/A filing.
2021-05-05 · 0001104659-21-061275
S-1/A amended
Amended registration statement
Updated registration statement filed after SEC comments or deal changes.
Updates the prior S-1 filing.
2021-04-12 · 0001104659-21-049393
S-1 filed
Initial registration statement
Initial public filing submitted to start the SEC review process.
First tracked pre-IPO filing for this issuer.
2021-02-23 · 0001104659-21-026802
Comparable Deals

20 comparable deals

Healthcare & BiotechLast 18 months
Only 0 strict matches; expanded to 20 using nearest neighbors.
Showing top 8 by similarity.
+9.1%
Median day-1
60%
Above issue
+0.7%
Median week-1
-20.9%
Downside (p10)
Attovia Therapeutics, Inc. ATTO
2026-08-05 $269M Day 1: +28.8% Wk 1: +18.6%
same SICrecent IPO
Scribe Therapeutics, Inc. SCTX
2026-07-24 $129M Day 1: +44.3% Wk 1: +37.2%
same SICrecent IPO
Odyssey Therapeutics, Inc. ODTX
2026-05-08 $279M Day 1: -8.8% Wk 1: -3.8%
same SICrecent IPO
Hemab Therapeutics Holdings, Inc. COAG
2026-05-01 $302M Day 1: +88.9% Wk 1: +43.0%
same SICrecent IPO
BlossomHill Therapeutics, Inc. BLSM
2026-08-07 $150M Day 1: +0.0% Wk 1: +0.0%
same SIC grouprecent IPO
Latigo Biotherapeutics, Inc. LTGO
2026-08-07 $346M Day 1: +1.4% Wk 1: +1.4%
same SIC grouprecent IPO
Braveheart Bio, Inc. BRVE
2026-08-06 $383M Day 1: +65.6% Wk 1: +66.7%
same SIC grouprecent IPO
Apnimed, Inc. APMD
2026-07-31 $192M Day 1: +43.6% Wk 1: +74.3%
same SIC grouprecent IPO

Recent News

No recent news stored for this issuer.