# ATARA BIOTHERAPEUTICS INC COM NEW

ATARA BIOTHERAPEUTICS INC COM NEW is a security (CUSIP 046513206) tracked across SEC portfolio filings. 33 institutional managers reported $14.4M on Form 13F as of 2026-06-30; 3 registered fund positions totaling $277K via N-PORT as of 2026-03-31.

## Summary

- Issuer: ATARA BIOTHERAPEUTICS INC
- Class: COM NEW
- CUSIP: 046513206
- Asset category: EC
- 13F holders: 33
- 13F value: $14.4M
- 13F period: 2026-06-30
- N-PORT fund positions: 3
- N-PORT value: $277K
- N-PORT report: 2026-03-31

## Top institutional holders (Form 13F)

_Showing 15 of 33 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $4.1M | 225,940 |
| [ADAGE CAPITAL PARTNERS GP, L.L.C.](https://search.stillhousedata.com/firm/160679) | Boston, MA | $3.3M | 700,000 |
| [Redmile Group, LLC](https://search.stillhousedata.com/firm/143606) | San Francisco, CA | $2.1M | 441,701 |
| [MACKENZIE FINANCIAL CORP](https://search.stillhousedata.com/firm/110338) | TORONTO ONTARIO, A6 | $1.5M | 313,620 |
| [Point72 Asset Management, L.P.](https://search.stillhousedata.com/firm/283077) | Stamford, CT | $919K | 194,264 |
| [EcoR1 Capital, LLC](https://search.stillhousedata.com/firm/167121) | San Francisco, CA | $471K | 99,593 |
| BlackRock, Inc. | New York, NY | $374K | 79,022 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $313K | 66,146 |
| UBS Group AG | Zurich, V8 | $237K | 50,070 |
| [STALEY CAPITAL ADVISERS INC](https://search.stillhousedata.com/firm/107118) | PITTSBURGH, PA | $237K | 50,000 |
| MILLENNIUM MANAGEMENT LLC | NEW YORK, NY | $226K | 47,689 |
| JANE STREET GROUP, LLC | NEW YORK, NY | $160K | 33,870 |
| [BRIDGEWAY CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/111441) | HOUSTON, TX | $155K | 32,691 |
| STATE STREET CORP | BOSTON, MA | $125K | 26,453 |
| FMR LLC | BOSTON, MA | $77K | 16,238 |

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $267K | 0.03% |
| [VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002855) | VANGUARD INSTITUTIONAL INDEX FUNDS | $13K | 0.00% |
| [Blackstone Alternative Multi-Strategy Fund](https://search.stillhousedata.com/fund/S000045538) | Blackstone Alternative Investment Funds | $-3K | -0.01% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/046513206.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.