The page is the record's research on the issuer — no analyst, no rating, no view. # Atara Biotherapeutics, Inc. (NASDAQ: ATRA) — research page As of 2026-11-08 · us-cm-kg · record version 1 ## Identity and listing The issuer is Atara Biotherapeutics, Inc., listed on NASDAQ under ticker ATRA, with ISIN US0465132068 and LEI 549300WBXUXZRE03MS38. Its security type is Corporate, its sector is 2836 Biological Products, (No Diagnostic Substances), and its jurisdiction is United States, Delaware. Segment is not on the record. Status: listed, not halted. ## The disclosure read The record holds 69 filings in the twelve months to 2026-11-08, across 40 filing days. The median gap between filing days is 3 days. Days from the latest filing to the record date are 65; the latest filing is dated 2026-09-04 and is of type directors_dealings. The NASDAQ exchange median is 52 filings, a median cadence gap of 6.0 days, and a median latency of 5.0 days. The sector median is 65.5 filings, a median cadence gap of 5.5 days, and a median latency of 4.0 days. ## Auditor The auditor of record is DELOITTE & TOUCHE LLP, located in San Francisco, California. The record holds no auditor changes. ## Events and halts The record holds no listing, delisting or name-change lines. Domicile change is not on the record: EDGAR states no dated change of state of incorporation on a filing line. Segment move is not on the record: the exchanges' tier transfers are not EDGAR filings. Halt flag: listed, not halted. ## Orderability The outcome is not determinable. The chapter's orderability section carries no client categories, so the outcome cannot name its client category. The rule version is acm-68000/us/reasonable-basis-suitability-finra-rule-2111/r1, and the chapter is as of 2026-11-04. ## Coverage The field was found. The issuer's investor-relations page names 7 research houses: Canaccord Genuity, Cowen & Co., Evercore ISI, H.C. Wainwright, Mizuho Securities, Rodman & Renshaw, LLC, and Stifel. ## Open research No openly published research notes were found on the record. ## Licensed Licensed research: none loaded. A licensed row is served only to an agent whose firm holds that licence (licensor, entitlement). No licensed row is loaded. ## As-of depth The vintage is sealed. The issuer's sealed years are 2021, 2022, 2023, 2024, 2025 and 2026. The market's earliest sealed date is 2021-01-04. The live record began on 2026-09-12. ## Sources 10 source pages are named on this page; every value above carries its own source page and read date in the numbers. - https://www.sec.gov/files/company_tickers_exchange.json (identity.exchange) - https://mapping.gleif.org/api/v2/isin-lei/latest (identity.isin) - https://data.sec.gov/submissions/CIK0001604464.json (identity.jurisdiction) - https://mapping.gleif.org/api/v2/isin-lei/latest/download (identity.lei) - https://mcp.us-cm-kg.ai/events/NASDAQ/ATRA (the disclosure lines) - https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts (the halt flag) - https://www.sec.gov/Archives/edgar/data/1604464/000119312526108361/atra-20251231.htm (the auditor) - https://mcp.us-cm-kg.ai/book/aio.json (the orderability chapter) - https://investors.atarabio.com/analyst-coverage (coverage) - https://mcp.us-cm-kg.ai/record/NASDAQ/ATRA (the record) --- Allooloo Technologies Corp. · https://getresearch.ai/us/NASDAQ/ATRA · public-record only · the same page signed and receipted: get_research at https://mcp.getresearch.ai/mcp