SCHEDULE 13G/A: Citadel & Kenneth Griffin Disclose Nkarta Stake

Citadel entities and Kenneth Griffin have disclosed their beneficial ownership in Nkarta, Inc., with Griffin holding an aggregate of 4.1% of the common stock.

Summary

• Citadel Advisors LLC, Citadel Advisors Holdings LP, and Citadel GP LLC beneficially own 2,444,273 shares, representing 3.4% of Nkarta, Inc.'s common stock.
• Citadel Securities LLC, Citadel Securities Group LP, and Citadel Securities GP LLC beneficially own 456,085 shares, representing 0.6% of Nkarta, Inc.'s common stock.
• Kenneth Griffin, through his control over the reporting persons, beneficially owns an aggregate of 2,900,358 shares, representing 4.1% of Nkarta, Inc.'s common stock.
• The percentages are based on 71,024,512 shares outstanding as of August 8, 2025, according to Nkarta's Form 10-Q.
• This filing is an Amendment No. 1 to a Schedule 13G, updating previously reported beneficial ownership information.

Sentiment

Score: 5

Explanation: This is a factual disclosure of beneficial ownership, which is neutral in sentiment. It provides transparency but does not inherently indicate positive or negative performance or outlook for the company.

Future Outlook

NA

Industry Context

This filing reflects a passive investment stake by a major financial institution and its principal in a publicly traded biotechnology company, Nkarta, Inc. Such disclosures are routine for institutional investors holding significant, but non-controlling, positions, providing market transparency regarding ownership structure.

Stakeholder Impact

• Provides transparency to shareholders and the market regarding significant institutional ownership in Nkarta, Inc.

Key Dates

Keywords

Nkarta Inc., Citadel Advisors LLC, Kenneth Griffin, Beneficial Ownership, Schedule 13G, Common Stock, Institutional Investor, Equity Stake