GC Corp. - 11 May 2026 Form 4 Insider Report for Artiva Biotherapeutics, Inc. (ARTV)

Reporting relationship: 10%+ Owner
Issuer ticker: ARTV
Reported as of: 11 May 2026
Net transaction value: +$16,499,992
SEC form: 4
Accepted by SEC: 28 May 2026, 16:34:23 UTC
Prior SEC filing: 22 Jul 2024
Source filing: View source filing
Reporting owner signature: GC Corp. By: /s/ Yong-Jun Huh, Chief Executive Officer

Key filing fact

GC Corp. filed Form 4 for Artiva Biotherapeutics, Inc. (ARTV) on 28 May 2026.

Key facts

This page summarizes GC Corp.'s Form 4 filing for Artiva Biotherapeutics, Inc. (ARTV).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 28 May 2026, 16:34.

Change

Previous filing in this sequence was filed on 22 Jul 2024.
Current net transaction value: +$16,499,992.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (2)

CIK 0001931382 Primary reporting owner

GC Corp.

Relationship: 10%+ Owner
Address: 107 IHYEON-RO,30BEON-GIL, GILHEUNG-GU, YONGIN-SI, KOREA, REPUBLIC OF
Signature: GC Corp. By: /s/ Yong-Jun Huh, Chief Executive Officer
Signature date: 28 May 2026

CIK 0001931891

GC Cell Corp

Relationship: 10%+ Owner
Address: 107 IHYEON-RO, 30BEON-GI, GIHEUNG-GU,, YONGIN-SI, KOREA, REPUBLIC OF
Signature: GC Cell Corporation By: /s/ Jaiwang Kim, Chief Executive Officer
Signature date: 28 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ARTV transaction

Common Stock

Purchase

Transaction value: $12,499,995
Shares: +1,085,069
Change %: +33%
Price: $11.52
Shares after: 4,391,969
Date: 11 May 2026
Ownership: Direct
Footnotes: F1

ARTV transaction

Common Stock

Purchase

Transaction value: $12,499,995
Shares: +1,085,069
Change %: +33%
Price: $11.52
Shares after: 4,391,969
Date: 11 May 2026
Ownership: Direct
Footnotes: F1

ARTV transaction

Common Stock

Purchase

Transaction value: $3,999,997
Shares: +347,222
Change %: +28%
Price: $11.52
Shares after: 1,607,734
Date: 11 May 2026
Ownership: By GC Cell Corporation
Footnotes: F2

ARTV transaction

Common Stock

Purchase

Transaction value: $3,999,997
Shares: +347,222
Change %: +28%
Price: $11.52
Shares after: 1,607,734
Date: 11 May 2026
Ownership: By GC Cell Corporation
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

GC Corp., a public Korean holdings company, is ultimately controlled by its board of directors. As of March 26, 2026, the board consists of: Mr. Yong-Jun Huh, Huh Il-Sup, Park Yong-Tae, Kang Joonho, and Lee Choonwoo. Each of these individual directors of GC Corp. may be deemed to share voting and investment power over the shares held by GC Corp. and each disclaims beneficial ownership of all shares held by GC Corp., except to the extent of any pecuniary interest therein.

Footnote F2

The shares are held directly by GC Cell Corporation. GC Corp., a public Korean holdings company, is the parent company of GC Cell Corporation and is ultimately controlled by its board of directors. As of March 26, 2026, the board consists of: Mr. Yong-Jun Huh, Huh Il-Sup, Park Yong-Tae, Kang Joonho, and Lee Choonwoo. Each of these individual directors of GC Corp. may be deemed to share voting and investment power over the shares held by GC Corp. and GC Cell Corporation and each disclaims beneficial ownership of all shares held by such entities, except to the extent of any pecuniary interest therein.