Point72 (ATRA) holds 6.2% of Atara Biotherapeutics as of May 7, 2026

Rhea-AI Filing Summary

Atara Biotherapeutics received a Schedule 13G reporting that Point72-affiliated entities beneficially own 526,682 shares of Common Stock, representing 6.2% of the class as of May 7, 2026. The filing states Point72 Asset Management, Point72 Capital Advisors Inc., and Steven A. Cohen share voting and dispositive power over these shares through Point72 Associates under a joint filing agreement. The reporting persons own no shares directly and the disclosure notes Point72 Associates has the right to receive dividends or sale proceeds for the reported position.

Key Figures

Shares beneficially owned: 526,682 shares Percent of class: 6.2% Reporting date: May 7, 2026

3 metrics

Shares beneficially owned 526,682 shares as of May 7, 2026

Percent of class 6.2% percent of common stock as reported in Item 4

Reporting date May 7, 2026 ownership and voting/dispositive powers stated as of this date

Key Terms

Schedule 13G, beneficially owned, shared dispositive power, Joint Filing Agreement

4 terms

Schedule 13G regulatory

"This statement is filed by: (i) Point72 Asset Management... (Schedule 13G)"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

beneficially owned financial

"Amount beneficially owned: The information required by Item 4(a) is set forth..."

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

shared dispositive power financial

"Shared Dispositive Power 526,682.00"

Joint Filing Agreement legal

"have entered into a Joint Filing Agreement, a copy of which is filed with this as Exhibit 99.1"

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Atara Biotherapeutics, Inc.

(Name of Issuer)

Common Stock, par value $0.0001 per share

(Title of Class of Securities)

046513206

(CUSIP Number)

05/07/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 046513206

1

Names of Reporting Persons

Point72 Asset Management, L.P.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 526,682.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 526,682.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

526,682.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

6.2 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP Number(s): 046513206

1

Names of Reporting Persons

Point72 Capital Advisors, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 526,682.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 526,682.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

526,682.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

6.2 %

12

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13G

CUSIP Number(s): 046513206

1

Names of Reporting Persons

Steven A. Cohen

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 526,682.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 526,682.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

526,682.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

6.2 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Atara Biotherapeutics, Inc.
(b)	Address of issuer's principal executive offices: 1280 Rancho Conejo Blvd., Thousand Oaks, CA 91320
Item 2.
(a)	Name of person filing: This statement is filed by: (i) Point72 Asset Management, L.P. ("Point72 Asset Management") with respect to the shares of common stock, par value $0.0001 per share ("Common Stock"), of Atara Biotherapeutics, Inc. held by Point72 Associates, LLC, an investment fund it manages ("Point72 Associates"); (ii) Point72 Capital Advisors, Inc. ("Point72 Capital Advisors Inc.") with respect to the shares of Common Stock held by Point72 Associates; and (iii) Steven A. Cohen ("Mr. Cohen") with respect to the shares of Common Stock beneficially owned by Point72 Asset Management and Point72 Capital Advisors Inc. Cubist Systematic Strategies, LLC is a relying adviser on the Form ADV of Point72 Asset Management and acts as a sub-advisor with respect to a portion of the shares of Common Stock reported herein. Point72 Asset Management, Point72 Capital Advisors Inc., and Mr. Cohen have entered into a Joint Filing Agreement, a copy of which is filed with this Schedule 13G as Exhibit 99.1, pursuant to which they have agreed to file this Schedule 13G jointly in accordance with the provisions of Rule 13d-1(k) of the Securities Exchange Act of 1934 (the "Act").
(b)	Address or principal business office or, if none, residence: The address of the principal business office of Point72 Asset Management, Point72 Capital Advisors Inc., and Mr. Cohen is 72 Cummings Point Road, Stamford, CT 06902.
(c)	Citizenship: Point72 Asset Management is a Delaware limited partnership. Point72 Capital Advisors Inc. is a Delaware corporation. Mr. Cohen is a United States citizen.
(d)	Title of class of securities: Common Stock, par value $0.0001 per share
(e)	CUSIP Number(s): 046513206
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: The information required by Item 4(a) is set forth in Row 9 of the cover page for each of the Reporting Persons and is incorporated herein by reference. Such information is as of the close of business on May 7, 2026. Point72 Asset Management, Point72 Capital Advisors Inc., and Mr. Cohen own directly no shares of Common Stock. Pursuant to an investment management agreement, Point72 Asset Management maintains investment and voting power with respect to the securities held by Point72 Associates. Point72 Capital Advisors Inc. is the general partner of Point72 Asset Management. Mr. Cohen controls each of Point72 Asset Management and Point72 Capital Advisors Inc. The filing of this statement should not be construed as an admission that any of the foregoing persons or any Reporting Person is, for the purposes of Section 13 of the Act, the beneficial owner of the shares of Common Stock reported herein.
(b)	Percent of class: 6.2%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for each of the Reporting Persons and is incorporated herein by reference. Such information is as of the close of business on May 7, 2026.
	(ii) Shared power to vote or to direct the vote: The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for each of the Reporting Persons and is incorporated herein by reference. Such information is as of the close of business on May 7, 2026.
	(iii) Sole power to dispose or to direct the disposition of: The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for each of the Reporting Persons and is incorporated herein by reference. Such information is as of the close of business on May 7, 2026.
	(iv) Shared power to dispose or to direct the disposition of: The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for each of the Reporting Persons and is incorporated herein by reference. Such information is as of the close of business on May 7, 2026.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. See Item 2(a). Point72 Associates has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, more than 5 percent of the outstanding Common Stock.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Point72 Asset Management, L.P.

Signature:	/s/ Jason M. Colombo
Name/Title:	Jason M. Colombo, Authorized Person
Date:	05/08/2026

Point72 Capital Advisors, Inc.

Signature:	/s/ Jason M. Colombo
Name/Title:	Jason M. Colombo, Authorized Person
Date:	05/08/2026

Steven A. Cohen

Signature:	/s/ Jason M. Colombo
Name/Title:	Jason M. Colombo, Authorized Person
Date:	05/08/2026

Exhibit Information

Exhibit 99.1: Joint Filing Agreement

FAQ

What stake does Point72 report in Atara Biotherapeutics (ATRA)?

Point72 reports beneficial ownership of 526,682 shares, or 6.2% of Atara's common stock. That figure is reported as of May 7, 2026 and appears in Row 9 of the cover page and Item 4 of the filing.

Which Point72 entities filed the Schedule 13G for ATRA?

Point72 Asset Management, Point72 Capital Advisors Inc., and Steven A. Cohen filed jointly. The filing cites a Joint Filing Agreement and notes Cubist Systematic Strategies, LLC acts as a relying sub-adviser for a portion of the shares.

Do the reporting persons directly own the reported Atara shares?

No — the filing states they directly own no shares. Investment and voting power is exercised via Point72 Associates under an investment management agreement, per Item 4 of the filing.

Who has the right to dividends or sale proceeds for the reported shares?

Point72 Associates has the right to receive dividends or proceeds for the reported shares. Item 6 confirms that this right relates to more than 5% of the class and need not list underlying shareholders.