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ATRA
NASDAQ Life Sciences

Major Shareholder Files Intent to Sell Over $3 Million in Atara Biotherapeutics Stock

Arie Shkolnikov · Analysis by Wiseek AI
More coverage: Biotech Stocks · Healthcare
Sentiment info
Negative
Importance info
7
Price
$8.55
Mkt Cap
$43.838M
52W Low
$3.92
52W High
$19.145
52W Position info
118% above low
Off High info
55% below high
Rel. Volume info
53× avg
Market data snapshot near publication time

ATRA has more than doubled off its 52-week low of $3.92 on elevated volume (53× avg).

Summary

Panacea Innovation Ltd, a 10% stockholder, filed a Form 144 indicating intent to sell 313,446 shares of Atara Biotherapeutics common stock, valued at approximately $3.17 million.


Key Events · Ownership and Investor Activity · ATRA

  • Major Shareholder Intent to Sell

    Panacea Innovation Ltd, a 10% stockholder, filed a Form 144 to sell 313,446 shares of common stock.

  • Significant Value Proposed for Sale

    The proposed sale has an approximate market value of $3.17 million.

  • Context of Company Challenges

    This intent to sell follows a recent Nasdaq delisting notice and an ongoing "going concern" warning, adding to existing investor concerns.


Analysis · ATRA · Life Sciences

This Form 144 indicates Panacea Innovation Ltd, a 10% stockholder, intends to sell a significant portion of its holdings. The proposed sale of approximately $3.17 million in shares, representing over 7% of the company's market capitalization, is a notable event. This intent to liquidate comes amidst a challenging period for Atara Biotherapeutics, including a recent Nasdaq delisting notice and an existing "going concern" warning. While the company recently announced positive FDA meeting news, this significant sale by a major institutional investor could be interpreted as a lack of confidence or a strategic move to reduce exposure, adding to the negative sentiment surrounding the company's financial and regulatory situation.

At the time of this filing, ATRA was trading at $8.55 on NASDAQ in the Life Sciences sector, with a market capitalization of approximately $43.8M. The 52-week trading range was $3.92 to $19.15. This filing was assessed with negative market sentiment and an importance score of 7 out of 10.

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ATRA - Latest Insights

ATRA
Jun 26, 2026, 4:15 PM EDT
Filing Type: 8-K
Importance Score:
7
Price at Filing: $10.51
Real-time Price: $8.00 info
Change: -$2.51 (-24%) info
Market Cap: $76.136M info
ATRA
Jun 12, 2026, 4:05 PM EDT
Filing Type: 8-K
Importance Score:
7
Price at Filing: $10.41
Real-time Price: $8.00 info
Change: -$2.41 (-23%) info
Market Cap: $76.136M info
ATRA
May 12, 2026, 4:21 PM EDT
Source: Reuters
Importance Score:
7
Price at Filing: $9.41
Real-time Price: $8.00 info
Change: -$1.41 (-15%) info
Market Cap: $76.136M info
ATRA
May 12, 2026, 4:20 PM EDT
Filing Type: 424B5
Importance Score:
9
Price at Filing: $9.61
Real-time Price: $8.00 info
Change: -$1.61 (-17%) info
Market Cap: $76.136M info
ATRA
May 12, 2026, 4:15 PM EDT
Filing Type: 10-Q
Importance Score:
9
Price at Filing: $9.56
Real-time Price: $8.00 info
Change: -$1.56 (-16%) info
Market Cap: $76.136M info