Sensei Biotherapeutics, Inc.
Sensei Biotherapeutics, Inc. is a Public Limited Company registered in United States, and its current status with Maryland Department of Assessments and Taxation is active. Its registered address on file is Rockville, United States. 4 shareholders are on record for Sensei Biotherapeutics, Inc., and since every one of them is a company rather than an individual, this particular filing does not on its own establish an ultimate beneficial owner (UBO) — identifying one would mean tracing the ownership of each shareholding company in turn. This profile is sourced directly from Maryland Department of Assessments and Taxation and was last updated on 18 September 2026.
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Shareholders
4
Shareholders of Sensei Biotherapeutics, Inc.
Four shareholders are currently on record for Sensei Biotherapeutics, Inc., reflecting the stock ledger maintained under state corporate law (e.g. §219 of the Delaware General Corporation Law) rather than a public filing. The largest of these is Catalio Capital Management, LP , holding 82% — a majority holding — followed by Fidelity Concord Street Trust-Fidelity Extended Market Index Fund at 1.3%; the remaining 2 shareholders shown hold smaller stakes. Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
| Shareholder | Type | Holding | Source Document |
|---|---|---|---|
| Catalio Capital Management, LP | 82% | Maryland Department of Assessments and Taxation | |
| Fidelity Concord Street Trust-Fidelity Extended Market Index Fund | 1.3% | Maryland Department of Assessments and Taxation | |
| JPMORGAN CHASE & CO | 0% | Maryland Department of Assessments and Taxation | |
| SBI Securities Co., Ltd. | 0% | Maryland Department of Assessments and Taxation |
Officers
7
Directors and officers of Sensei Biotherapeutics, Inc.
The President, Ceo & Director of Sensei Biotherapeutics, Inc. currently on record is John K. Celebi M.b.a.; seven officers are currently on record for Sensei Biotherapeutics, Inc., filed with Maryland Department of Assessments and Taxation. Management authority at Sensei Biotherapeutics, Inc. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control. The source filing doesn't specify representation authority — whether officers can act individually or must sign jointly to bind the company — so that detail isn't available here.
Group Structure
Group structure of Sensei Biotherapeutics, Inc.
Sensei Biotherapeutics, Inc. has no recorded parent company — it sits at the top of its own group structure, with 3 subsidiaries recorded beneath it across 1 jurisdiction. Each of these downward relationships is derived rather than filed: resolved by matching entities across the registry network, not stated directly in a single document.
- ALVAXA BIOSCIENCES, INCORPORATED
- Sensei Bio Subsidiary, Inc.
- Alvaxa Biosciences, Inc.
Data availability
Those 3 subsidiaries span United States jurisdiction, though this list should not be read as complete — subsidiaries only become visible here where shareholder data has actually been filed with a register, so holdings in jurisdictions without that filing simply won't appear.
Sensei Biotherapeutics, Inc.
United States
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Frequently Asked Questions
Who owns Sensei Biotherapeutics, Inc.?
Four shareholders are currently on record for Sensei Biotherapeutics, Inc., reflecting the stock ledger maintained under state corporate law (e.g. §219 of the Delaware General Corporation Law) rather than a public filing. The largest of these is Catalio Capital Management, LP , holding 82% — a majority holding — followed by Fidelity Concord Street Trust-Fidelity Extended Market Index Fund at 1.3%; the remaining 2 shareholders shown hold smaller stakes. Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
Who is Sensei Biotherapeutics, Inc.'s UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for Sensei Biotherapeutics, Inc. is itself a company rather than a natural person, so no Ultimate Beneficial Owner (UBO) is identified at this level; establishing one would require tracing the ownership of each shareholding company in turn.
How many shareholders does Sensei Biotherapeutics, Inc. have on record?
4 shareholders are shown on record for Sensei Biotherapeutics, Inc..
Is Sensei Biotherapeutics, Inc. still an active company?
Sensei Biotherapeutics, Inc.'s status on Maryland Department of Assessments and Taxation is listed as active.
What is Sensei Biotherapeutics, Inc.'s registered address?
The registered address on file for Sensei Biotherapeutics, Inc. is Rockville, United States.
What legal structure is Sensei Biotherapeutics, Inc. registered as?
Sensei Biotherapeutics, Inc. is registered as a Public Limited Company in United States.
Who are the officers/directors of Sensei Biotherapeutics, Inc.?
The President, Ceo & Director of Sensei Biotherapeutics, Inc. currently on record is John K. Celebi M.b.a.; seven officers are currently on record for Sensei Biotherapeutics, Inc., filed with Maryland Department of Assessments and Taxation. Management authority at Sensei Biotherapeutics, Inc. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does Sensei Biotherapeutics, Inc. have a parent company or subsidiaries?
Sensei Biotherapeutics, Inc. has no recorded parent company — it sits at the top of its own group structure, with 3 subsidiaries recorded beneath it across 1 jurisdiction. Those 3 subsidiaries span United States jurisdiction, though this list should not be read as complete — subsidiaries only become visible here where shareholder data has actually been filed with a register, so holdings in jurisdictions without that filing simply won't appear.
Can Zavia monitor changes to Sensei Biotherapeutics, Inc.'s ownership over time?
This profile reflects a point-in-time snapshot from Maryland Department of Assessments and Taxation. Zavia's monitoring API can track changes to Sensei Biotherapeutics, Inc.'s registered shareholders, officers, and group structure going forward, flagging updates as they're filed rather than requiring a manual recheck.
Can I access Sensei Biotherapeutics, Inc.'s data through an API?
Yes. Zavia's API connects directly to official government ownership registries across 195 countries and territories, including United States, so records like Sensei Biotherapeutics, Inc.'s registration, shareholder, UBO, and group-structure data can be queried programmatically instead of viewed one page at a time.
Where does this company information come from, and how current is it?
This record is sourced directly from Maryland Department of Assessments and Taxation and was last synced on 18 September 2026.