{"success":true,"data":{"pressRelease":{"id":"3405","rtpr_id":"nPnbsxvL8a","ticker":"ATRA","exchange":"NASDAQ","all_tickers":["ATRA"],"title":"Atara Biotherapeutics, Inc. (ATRA) Shareholders Who Lost Money Have Opportunity to Lead Securities Fraud Lawsuit","author":"PR Newswire","published_at":"2026-04-21T19:06:00.025Z","article_body":"Atara Biotherapeutics, Inc. (ATRA) Shareholders Who Lost Money Have Opportunity to Lead Securities Fraud Lawsuit\n\nPR Newswire\n\nLOS ANGELES, April 21, 2026\n\nLOS ANGELES, April 21, 2026 /PRNewswire/ -- The Law Offices of Frank R. Cruz\n(https://edge.prnewswire.com/c/link/?t=0&l=en&o=4669811-1&h=847195483&u=https%3A%2F%2Fwww.frankcruzlaw.com%2F&a=The+Law+Offices+of+Frank+R.+Cruz)\nannounces that investors with losses related to Atara Biotherapeutics, Inc.\n(\"Atara\" or the \"Company\") (NASDAQ: ATRA\n(https://edge.prnewswire.com/c/link/?t=0&l=en&o=4669811-1&h=2622684293&u=https%3A%2F%2Ffinance.yahoo.com%2Fquote%2Fatra&a=ATRA)\n) have opportunity to lead the securities fraud class action lawsuit.\n\n(https://mma.prnewswire.com/media/1221557/The_Law_Offices_of_Frank_R_Cruz_Logo.html)\n\nIF YOU ARE AN INVESTOR WHO SUFFERED A LOSS IN ATARA BIOTHERAPEUTICS, INC.\n(ATRA), CLICK HERE\n(https://edge.prnewswire.com/c/link/?t=0&l=en&o=4669811-1&h=3462254407&u=https%3A%2F%2Fwww.frankcruzlaw.com%2Fcases%2Fatara-biotherapeutics-inc%2F&a=HERE)\n BEFORE MAY 22, 2026 (THE LEAD PLAINTIFF DEADLINE) TO PARTICIPATE IN THE\nONGOING SECURITIES FRAUD LAWSUIT.\n\nWhat Is The Lawsuit About?\nThe complaint filed alleges that, between May 20, 2024 and January 9, 2026,\nDefendants failed to disclose to investors that: (1) certain manufacturing\nissues, as well as deficiencies inherent in the ALLELE study, made it unlikely\nthat the FDA would approve the tabelecleucel BLA; (2) accordingly,\ntabelecleucel's regulatory prospects were overstated; (3) the aforementioned\nmanufacturing issues also subjected Atara to a heightened risk of regulatory\nscrutiny, as well as jeopardized its ongoing clinical trials; (4) all the\nforegoing was likely to have a significant negative impact on Atara's business\nand financial condition; and (5) as a result, Defendants' positive statements\nabout the Company's business, operations, and prospects were materially\nmisleading and/or lacked a reasonable basis at all relevant times.\n\nContact Us To Participate or Learn More:\nIf you wish to learn more about this action, or if you have any questions\nconcerning this announcement or your rights or interests with respect to these\nmatters, please contact us.\nThe Law Offices of Frank R. Cruz,\nEmail us at: info@frankcruzlaw.com (mailto:info@frankcruzlaw.com)\nCall us at: 310-914-5007\nVisit our website at: www.frankcruzlaw.com\n(https://edge.prnewswire.com/c/link/?t=0&l=en&o=4669811-1&h=4122132697&u=https%3A%2F%2Fwww.frankcruzlaw.com%2F&a=www.frankcruzlaw.com)\n\nFollow us for updates on Twitter: twitter.com/FRC_LAW\n(https://edge.prnewswire.com/c/link/?t=0&l=en&o=4669811-1&h=3487496955&u=https%3A%2F%2Ftwitter.com%2FFRC_LAW&a=twitter.com%2FFRC_LAW)\n.\n\nIf you inquire by email, please include your mailing address, telephone\nnumber, and number of shares purchased.\n\nTo be a member of the class action you need not take any action at this time;\nyou may retain counsel of your choice or take no action and remain an absent\nmember of the class action.\n\nThis press release may be considered Attorney Advertising in some\njurisdictions under the applicable law and ethical rules.\n\nView original content to download\nmultimedia:https://www.prnewswire.com/news-releases/atara-biotherapeutics-inc-atra-shareholders-who-lost-money-have-opportunity-to-lead-securities-fraud-lawsuit-302749170.html\n(https://www.prnewswire.com/news-releases/atara-biotherapeutics-inc-atra-shareholders-who-lost-money-have-opportunity-to-lead-securities-fraud-lawsuit-302749170.html)\n\nSOURCE The Law Offices of Frank R. Cruz, Los Angeles\n\n\n\nThe Law Offices of Frank R. Cruz, Los Angeles, Frank R. Cruz, Telephone: 310-914-5007, Email: fcruz@frankcruzlaw.com, Visit our website at: www.frankcruzlaw.com\n\nPhoto: \nhttps://mma.prnewswire.com/media/1221557/The_Law_Offices_of_Frank_R_Cruz_Logo.jpg\n\nCopyright (c) 2026 PR Newswire Association,LLC. All Rights Reserved.","article_body_html":"","raw_payload":{"data":{"id":"nPnbsxvL8a","title":"Atara Biotherapeutics, Inc. (ATRA) Shareholders Who Lost Money Have Opportunity to Lead Securities Fraud Lawsuit","author":"PR Newswire","ticker":"ATRA","created":"2026-04-21T19:06:00.025Z","tickers":["ATRA"],"exchange":"NASDAQ","article_body":"Atara Biotherapeutics, Inc. (ATRA) Shareholders Who Lost Money Have Opportunity to Lead Securities Fraud Lawsuit\n\nPR Newswire\n\nLOS ANGELES, April 21, 2026\n\nLOS ANGELES, April 21, 2026 /PRNewswire/ -- The Law Offices of Frank R. Cruz\n(https://edge.prnewswire.com/c/link/?t=0&l=en&o=4669811-1&h=847195483&u=https%3A%2F%2Fwww.frankcruzlaw.com%2F&a=The+Law+Offices+of+Frank+R.+Cruz)\nannounces that investors with losses related to Atara Biotherapeutics, Inc.\n(\"Atara\" or the \"Company\") (NASDAQ: ATRA\n(https://edge.prnewswire.com/c/link/?t=0&l=en&o=4669811-1&h=2622684293&u=https%3A%2F%2Ffinance.yahoo.com%2Fquote%2Fatra&a=ATRA)\n) have opportunity to lead the securities fraud class action lawsuit.\n\n(https://mma.prnewswire.com/media/1221557/The_Law_Offices_of_Frank_R_Cruz_Logo.html)\n\nIF YOU ARE AN INVESTOR WHO SUFFERED A LOSS IN ATARA BIOTHERAPEUTICS, INC.\n(ATRA), CLICK HERE\n(https://edge.prnewswire.com/c/link/?t=0&l=en&o=4669811-1&h=3462254407&u=https%3A%2F%2Fwww.frankcruzlaw.com%2Fcases%2Fatara-biotherapeutics-inc%2F&a=HERE)\n BEFORE MAY 22, 2026 (THE LEAD PLAINTIFF DEADLINE) TO PARTICIPATE IN THE\nONGOING SECURITIES FRAUD LAWSUIT.\n\nWhat Is The Lawsuit About?\nThe complaint filed alleges that, between May 20, 2024 and January 9, 2026,\nDefendants failed to disclose to investors that: (1) certain manufacturing\nissues, as well as deficiencies inherent in the ALLELE study, made it unlikely\nthat the FDA would approve the tabelecleucel BLA; (2) accordingly,\ntabelecleucel's regulatory prospects were overstated; (3) the aforementioned\nmanufacturing issues also subjected Atara to a heightened risk of regulatory\nscrutiny, as well as jeopardized its ongoing clinical trials; (4) all the\nforegoing was likely to have a significant negative impact on Atara's business\nand financial condition; and (5) as a result, Defendants' positive statements\nabout the Company's business, operations, and prospects were materially\nmisleading and/or lacked a reasonable basis at all relevant times.\n\nContact Us To Participate or Learn More:\nIf you wish to learn more about this action, or if you have any questions\nconcerning this announcement or your rights or interests with respect to these\nmatters, please contact us.\nThe Law Offices of Frank R. Cruz,\nEmail us at: info@frankcruzlaw.com (mailto:info@frankcruzlaw.com)\nCall us at: 310-914-5007\nVisit our website at: www.frankcruzlaw.com\n(https://edge.prnewswire.com/c/link/?t=0&l=en&o=4669811-1&h=4122132697&u=https%3A%2F%2Fwww.frankcruzlaw.com%2F&a=www.frankcruzlaw.com)\n\nFollow us for updates on Twitter: twitter.com/FRC_LAW\n(https://edge.prnewswire.com/c/link/?t=0&l=en&o=4669811-1&h=3487496955&u=https%3A%2F%2Ftwitter.com%2FFRC_LAW&a=twitter.com%2FFRC_LAW)\n.\n\nIf you inquire by email, please include your mailing address, telephone\nnumber, and number of shares purchased.\n\nTo be a member of the class action you need not take any action at this time;\nyou may retain counsel of your choice or take no action and remain an absent\nmember of the class action.\n\nThis press release may be considered Attorney Advertising in some\njurisdictions under the applicable law and ethical rules.\n\nView original content to download\nmultimedia:https://www.prnewswire.com/news-releases/atara-biotherapeutics-inc-atra-shareholders-who-lost-money-have-opportunity-to-lead-securities-fraud-lawsuit-302749170.html\n(https://www.prnewswire.com/news-releases/atara-biotherapeutics-inc-atra-shareholders-who-lost-money-have-opportunity-to-lead-securities-fraud-lawsuit-302749170.html)\n\nSOURCE The Law Offices of Frank R. Cruz, Los Angeles\n\n\n\nThe Law Offices of Frank R. Cruz, Los Angeles, Frank R. Cruz, Telephone: 310-914-5007, Email: fcruz@frankcruzlaw.com, Visit our website at: www.frankcruzlaw.com\n\nPhoto: \nhttps://mma.prnewswire.com/media/1221557/The_Law_Offices_of_Frank_R_Cruz_Logo.jpg\n\nCopyright (c) 2026 PR Newswire Association,LLC. All Rights Reserved."},"type":"article","timestamp":"2026-04-21T19:06:00.07516325Z","server_sent_at_ms":1776798360075},"received_at":"2026-04-21T19:06:00.127Z","source_url":null},"analysis":null,"durationMs":null,"modelName":null}}