Figures computed from official regulatory filings — .
Ownershipinsiders 58.97% · institutions 2.11% · short 5.5% of float
In USD · as of Oct 5, 2026
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NKGen Biotech, Inc., a clinical-stage biotechnology company, develops and commercializes cell therapies for neurodegenerative and oncological diseases based on activated natural killer (NK) cells in the United States. The company develops SNK01, an autologous NK cell therapy candidate in Phase I/IIa trial for the treatment of neurodegenerative diseases, such as Alzheimer's and Parkinson's disease; and SNK02, which consists of an allogenic NK cell therapy that has completed Phase 1 trial and a HER2-CAR NK cell therapy candidate in pre-clinical trial to treat refractory solid tumors. It has a strategic partnership with HekaBio K.K., a Japan-based healthcare platform, to develop, conduct clinical trials, obtain regulatory approvals, manufacture, and commercialize the company's autologous NK cell therapy product candidates for central nervous system and autoimmune conditions in Japan. The company also has a license agreement with NKMAX Co., Ltd. for the research and development of its NK cell program. NKGen Biotech, Inc. was founded in 2017 and is headquartered in Santa Ana, California.
Market information source · Oct 5, 2026
Periods recorded in the consulted sources. These do not certify the legal dates of name changes.
SEC company identity · Oct 5, 2026
Open-market timeline · full history
24 buys— close pricebar = usd volume, √ scaleclick a period to filter the table
| Insider | Type | Value · USD | Signals | Details |
|---|---|---|---|---|
| Cherng Andrew Jin-Chan | Buy | $2.6M | conv 76First in 12mo |
| SEC |
| Cherng Andrew Jin-Chan | BuyD (derivative) | $5.1M | First in 12mo | SEC |
| Song Paul Y.track record | Buy | $2.7M | conv 97Unusual sizeFirst in 12mo | SEC |
| Song Paul Y.track record | BuyD (derivative) | $5.4M | Unusual sizeFirst in 12mo | SEC |
| Graf James Atrack record | Other | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Graf James Atrack record | OtherD (derivative) | n/a (No price was disclosed in the filing) | SEC |
| Graf James Atrack record | OtherD (derivative) | n/a (No price was disclosed in the filing) | SEC |
| Graf Acquisition Partners IV LLC | OtherD (derivative) | n/a (No price was disclosed in the filing) | SEC |
| Graf Acquisition Partners IV LLC | Other | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Graf Acquisition Partners IV LLC | OtherD (derivative) | n/a (No price was disclosed in the filing) | SEC |
| Graf Acquisition Partners IV LLC | Other | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Graf Acquisition Partners IV LLC | OtherD (derivative) | n/a (No price was disclosed in the filing) | SEC |
| Graf Acquisition Partners IV LLC | Other | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Graf Acquisition Partners IV LLC | OtherD (derivative) | n/a (No price was disclosed in the filing) | SEC |
| Graf Acquisition Partners IV LLC | OtherD (derivative) | n/a (No price was disclosed in the filing) | SEC |
| Klowden Michael | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Song Paul Y.track record | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Scott Kathleen D. | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Klowden Michael | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Scott Kathleen D. | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Graf James Atrack record | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Gottardis Marco | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Kim Yong Man | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Song Paul Y.track record | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Gagnon Pierre | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |