131 employees in San Diego, CA are covered by the one WARN layoff or closure notice Artiva Biotherapeutics, Inc. has on file as of November 4, 2026, dated October 27, 2026, effective December 31, 2026. Artiva Biotherapeutics, Inc. also reported an exit or restructuring plan to the SEC on Form 8-K (California WARN notice, October 27, 2026).
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Artiva Biotherapeutics, Inc. filed 1 WARN notice in California, covering 131 employees in total. Each notice below links to the state file it was published in.
Did Artiva Biotherapeutics, Inc. have layoffs in 2026? Every notice
| Notice | Where | Employees | Type | Effective | Industry | Days' notice | Source |
|---|---|---|---|---|---|---|---|
| 2026-10-27 | San Diego, CA | 131 | layoff, permanent | 2026-12-31 | Professional Scientific and Technical Services | 65 | CA file |
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More on Artiva Biotherapeutics, Inc. and the records around it.
Artiva Biotherapeutics, Inc. elsewhere on the record
- 5%+ stake filings Aug 2026
- Who owns it
Companies that share a holder
- 5AM Ventures VI, L.P. also filed stake reports on 2 other companies: CAMP4 THERAPEUTICS CORPORATION (Aug 2026), VOR BIOPHARMA INC. (Jul 2025)
- VIKING GLOBAL INVESTORS LP also filed stake reports on 27 other companies: City Therapeutics, Inc. (Oct 2026), MID AMERICA APARTMENT COMMUNITIES INC. (Oct 2026), REGAL REXNORD CORP (Sep 2026)
- Venrock Healthcare Capital Partners III, L.P. also filed stake reports on 34 other companies: Entera Bio Ltd. (Oct 2026), Lycia Therapeutics, Inc. (Oct 2026), Frazier Life Sciences Acquisition Corp. II (Oct 2026)
Other layoffs like this
Layoff notices in California filed under Professional Scientific and Technical Services, Q4 2026, most jobs first.
- Avidity Biosciences, Inc. (40 jobs, Oct 2026)
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SEC filings: exit or restructuring (Item 2.05)
Artiva Biotherapeutics, Inc. (CIK 1817241) reported 1 exit or restructuring plan to the SEC on Form 8-K under Item 2.05. The sentences below are quoted from the filings as written. These filings are matched to the WARN notices above on the company's exact name.
Form 8-K filed 2026-10-27
Share of workforce
On October 22, 2026, the board of directors of the Company approved the discontinuation of the Company's development of AlloNK (AB-101), its non-genetically modified, allogeneic natural killer (NK) cell therapy candidate, as the Company conducts a process to explore strategic alternatives to maximize stockholder value, which includes a plan to implement a reduction of the Company's workforce by approximately 94% of the Company's current employee base (the "Wind Down").
Timing
The Company expects to complete the workforce reduction in the first quarter of 2027 and to incur a significant majority of the costs related to the Wind Down in the fourth quarter of 2026.
Also on the record for Artiva Biotherapeutics, Inc.
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| August 14, 2026 | Stake report, Schedule 13G/A, by Venrock Healthcare Capital Partners III, L.P. | 4.2% of the class | 5%+ stakes | Source |
| August 10, 2026 | Stake report, Schedule 13G/A, by Andrew J. Schwab | 4.8% of the class | 5%+ stakes | Source |
| July 23, 2026 | Stake report, Schedule 13D/A, by RA Capital Management, L.P. | 37.9% of the class | 5%+ stakes | Source |
| June 15, 2026 | Stake report, Schedule 13D/A, by RA Capital Management, L.P. | 36.6% of the class | 5%+ stakes | Source |
| May 28, 2026 | Stake report, Schedule 13D/A, by GC Corp | 12.3% of the class | 5%+ stakes | Source |
| May 19, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | Source |
| May 18, 2026 | Stake report, Schedule 13G, by VIKING GLOBAL INVESTORS LP | 5.4% of the class | 5%+ stakes | Source |
| May 13, 2026 | Stake report, Schedule 13D/A, by RA Capital Management, L.P. | 33.7% of the class | 5%+ stakes | Source |
| July 16, 2025 | Stake report, Schedule 13G/A, by BlackRock, Inc. | 2% of the class | 5%+ stakes | Source |
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Where this comes from
Employers covered by the federal WARN Act, and by the stricter laws some states add, must give written notice before a mass layoff or a site closure. The state labor department publishes those notices. Every row here is one of them, taken from that state's own published file and linked to it, so each figure can be checked at the source.
A notice states the employer, the location, the number of employees affected, and when the layoff or closure takes effect. It does not state a reason, and neither does this page. Where a company also appears in SEC filings under the same name and in the same state, its recorded fundraising is shown alongside, as a matter of record rather than as an explanation. New Jersey and Pennsylvania list a notice under the month it was posted or received, not the day, so their notices show a month. Tennessee gives the county rather than the city.
Public companies must also report to the SEC, on Form 8-K under Item 2.05, when they commit to an exit or restructuring plan that will cost them material charges, which is how most large layoffs and closures by listed companies are disclosed. Those filings are national, so they cover companies in every state. Each sentence shown from one is quoted exactly and linked to the filing; where a filing does not state a figure, none is shown.
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Who owns Artiva Biotherapeutics, Inc.? Owners, funding and legal record
Cite this page
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