[SCHEDULE 13G] Oruka Therapeutics, Inc. SEC Filing

Rhea-AI Filing Summary

Oruka Therapeutics, Inc. received a Schedule 13G reporting that a group of Viking-related entities and three named individuals may be deemed to beneficially own 2,666,690 shares of the company’s common stock, representing 5.5% of the outstanding class based on 48,384,150 shares outstanding following a private placement. The filing breaks ownership down: Viking Global Opportunities (VGOP) directly owns 1,600,014 shares (3.3%) and Viking Global Opportunities Drawdown (VGOD) directly owns 1,066,676 shares (2.2%). All reporting persons report only shared voting and dispositive power and no sole voting or dispositive power. The filing lists Oruka’s principal executive office in Menlo Park, CA, and provides the reporting persons’ business address in Stamford, CT. Signatures are dated 09/24/2025.

Positive

• Disclosure compliance: The reporting group filed a Schedule 13G clearly disclosing beneficial ownership above the 5% threshold.
• Detailed attribution: The filing provides a clear breakdown of ownership by entity (VGOP 1,600,014; VGOD 1,066,676) and percent of class.

Negative

• None.

Insights

Securities Analyst

TL;DR: Viking-affiliated group holds a disclosed 5.5% stake, split between two investment vehicles (3.3% and 2.2%).

The Schedule 13G indicates passive reporting under Section 13(g) structure with shared voting and dispositive power across affiliated entities and three executive committee members. The stake equals 5.5% of shares outstanding after a recent private placement, which crosses the common 5% reporting threshold and therefore requires disclosure. The structure shows layered ownership through funds and GPs, but the filing reports no sole control and includes the required joint filing agreement. This is a disclosure of ownership rather than an assertion of control or a change in corporate governance.

Corporate Governance Expert

TL;DR: Ownership is material for disclosure but presented as passive with shared authority, not an active control claim.

The filing clarifies beneficial ownership attribution under Rule 13d-3 through fund and GP relationships and notes that executive committee members may be deemed to beneficially own the shares held by the funds. All reported powers are shared; no individual or entity claims sole voting or dispositive authority. The document includes authorized signatures and a joint filing agreement, satisfying procedural requirements for a grouped 13G filing.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Oruka Therapeutics, Inc.

(Name of Issuer)

Common Stock, $0.001 par value per share

(Title of Class of Securities)

687604108

(CUSIP Number)

09/17/2025

(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)

SCHEDULE 13G

CUSIP No. 687604108

1

Names of Reporting Persons

VIKING GLOBAL INVESTORS LP

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 2,666,690.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,666,690.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,666,690.00

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)

5.5 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. 687604108

1

Names of Reporting Persons

Viking Global Opportunities Parent GP LLC

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 2,666,690.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,666,690.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,666,690.00

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)

5.5 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. 687604108

1

Names of Reporting Persons

Viking Global Opportunities GP LLC

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 1,600,014.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,600,014.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,600,014.00

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)

3.3 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. 687604108

1

Names of Reporting Persons

Viking Global Opportunities Portfolio GP LLC

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 1,600,014.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,600,014.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,600,014.00

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)

3.3 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. 687604108

1

Names of Reporting Persons

Viking Global Opportunities Illiquid Investments Sub-Master LP

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

CAYMAN ISLANDS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 1,600,014.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,600,014.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,600,014.00

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)

3.3 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. 687604108

1

Names of Reporting Persons

Viking Global Opportunities Drawdown GP LLC

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 1,066,676.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,066,676.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,066,676.00

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)

2.2 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. 687604108

1

Names of Reporting Persons

Viking Global Opportunities Drawdown Portfolio GP LLC

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 1,066,676.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,066,676.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,066,676.00

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)

2.2 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. 687604108

1

Names of Reporting Persons

Viking Global Opportunities Drawdown (Aggregator) LP

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

CAYMAN ISLANDS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 1,066,676.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,066,676.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,066,676.00

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)

2.2 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. 687604108

1

Names of Reporting Persons

HALVORSEN OLE ANDREAS

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

NORWAY

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,666,690.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,666,690.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,666,690.00

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)

5.5 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. 687604108

1

Names of Reporting Persons

Ott David C.

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 2,666,690.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,666,690.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,666,690.00

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)

5.5 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. 687604108

1

Names of Reporting Persons

Shabet Rose Sharon

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 2,666,690.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,666,690.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,666,690.00

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)

5.5 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Oruka Therapeutics, Inc.
(b)	Address of issuer's principal executive offices: 855 Oak Grove Avenue, Suite 100, Menlo Park, California, 94025
Item 2.
(a)	Name of person filing: Viking Global Investors LP ("VGI"), Viking Global Opportunities Parent GP LLC ("Opportunities Parent"), Viking Global Opportunities GP LLC ("Opportunities GP"), Viking Global Opportunities Portfolio GP LLC ("Opportunities Portfolio GP"), Viking Global Opportunities Illiquid Investments Sub-Master LP ("VGOP"), Viking Global Opportunities Drawdown GP LLC ("VGOD GP"), Viking Global Opportunities Drawdown Portfolio GP LLC ("VGOD Portfolio GP"), Viking Global Opportunities Drawdown (Aggregator) LP ("VGOD"), O. Andreas Halvorsen, David C. Ott and Rose S. Shabet (collectively, the "Reporting Persons")
(b)	Address or principal business office or, if none, residence: The business address of each of the Reporting Persons is: 600 Washington Boulevard, Floor 11, Stamford, Connecticut 06901.
(c)	Citizenship: VGI is a Delaware limited partnership; Opportunities Parent, Opportunities GP, Opportunities Portfolio GP, VGOD GP and VGOD Portfolio GP are Delaware limited liability companies; VGOP and VGOD are Cayman Islands exempted limited partnerships; O. Andreas Halvorsen is a citizen of Norway; and David C. Ott and Rose S. Shabet are citizens of the United States.
(d)	Title of class of securities: Common Stock, $0.001 par value per share
(e)	CUSIP No.: 687604108
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: VGI: 2,666,690 VGI provides managerial services to VGOP and VGOD. VGI has the authority to dispose of and vote the shares of Common Stock that VGOP and VGOD directly own. VGI does not directly own any shares of Common Stock. Based on Rule 13d-3 under the Securities Exchange Act of 1934, as amended (the "Act"), VGI may be deemed to beneficially own the shares of Common Stock that VGOP and VGOD directly own. VGI beneficially owns 2,666,690 shares of Common Stock consisting of 1,600,014 and 1,066,676 shares of Common Stock directly owned by VGOP and VGOD, respectively. Opportunities Parent: 2,666,690 Opportunities Parent is the sole member of Opportunities GP, which has the authority to dispose of and vote the shares of Common Stock controlled by Opportunities Portfolio GP (which consists of the shares of Common Stock that VGOP directly owns), and is the sole member of VGOD GP, which has the authority to dispose of and vote the shares of Common Stock controlled by VGOD Portfolio GP (which consists of the shares of Common Stock that VGOD directly owns). Opportunities Parent does not directly own any shares of Common Stock. Based on Rule 13d-3 under the Act, Opportunities Parent may be deemed to beneficially own the shares of Common Stock that VGOP and VGOD directly own. Opportunities Parent beneficially owns 2,666,690 shares of Common Stock consisting of 1,600,014 and 1,066,676 shares of Common Stock directly owned by VGOP and VGOD, respectively. Opportunities GP: 1,600,014 Opportunities GP serves as the sole member of Opportunities Portfolio GP and has the authority to dispose of and vote the shares of Common Stock controlled by Opportunities Portfolio GP, which consists of the shares of Common Stock that VGOP directly owns. In addition, Opportunities GP is the general partner of each of Viking Global Opportunities Intermediate LP, Viking Global Opportunities III LP, and Viking Global Opportunities LP. Opportunities GP does not directly own any shares of Common Stock. Based on Rule 13d-3 under the Act, Opportunities GP may be deemed to beneficially own the shares of Common Stock that VGOP directly owns. Opportunities GP beneficially owns 1,600,014 shares of Common Stock consisting of 1,600,014 shares of Common Stock directly owned by VGOP. Opportunities Portfolio GP: 1,600,014 Opportunities Portfolio GP serves as the general partner of VGOP and has the authority to dispose of and vote the shares of Common Stock that VGOP directly owns. Opportunities Portfolio GP does not directly own any shares of Common Stock. Based on Rule 13d-3 under the Act, Opportunities Portfolio GP may be deemed to beneficially own the shares of Common Stock that VGOP directly owns. Opportunities Portfolio GP beneficially owns 1,600,014 shares of Common Stock consisting of 1,600,014 shares of Common Stock directly owned by VGOP. VGOP: 1,600,014 VGOP has the authority to dispose of and vote the 1,600,014 shares of Common Stock that it owns, which power may be exercised by its general partner, Opportunities Portfolio GP, and by VGI, an affiliate of Opportunities Portfolio GP, which provides managerial services to VGOP. Viking Global Opportunities LP (a Delaware limited partnership) and Viking Global Opportunities III LP (a Cayman Islands exempted limited partnership), through its investment in Viking Global Opportunities Intermediate LP (a Cayman Islands exempted limited partnership), invest substantially all of their assets in Viking Global Opportunities Master LP (a Cayman Islands exempted limited partnership), which in turn invests through VGOP. VGOD GP: 1,066,676 VGOD GP serves as the sole member of VGOD Portfolio GP and has the authority to dispose of and vote the shares of Common Stock controlled by VGOD Portfolio GP, which consists of the shares of Common Stock that VGOD directly owns. In addition, VGOD GP is the general partner of each of Viking Global Opportunities Drawdown (Internal) LP, Viking Global Opportunities Drawdown (Onshore) LP, and Viking Global Opportunities Drawdown (Offshore) LP. VGOD GP does not directly own any shares of Common Stock. Based on Rule 13d-3 under the Act, VGOD GP may be deemed to beneficially own the shares of Common Stock that VGOD directly owns. VGOD GP beneficially owns 1,066,676 shares of Common Stock consisting of 1,066,676 shares of Common Stock directly owned by VGOD. VGOD Portfolio GP: 1,066,676 VGOD Portfolio GP serves as the general partner of VGOD and has the authority to dispose of and vote the shares of Common Stock that VGOD directly owns. VGOD Portfolio GP does not directly own any shares of Common Stock. Based on Rule 13d-3 under the Act, VGOD Portfolio GP may be deemed to beneficially own the shares of Common Stock that VGOD directly owns. VGOD Portfolio GP beneficially owns 1,066,676 shares of Common Stock consisting of 1,066,676 shares of Common Stock directly owned by VGOD. VGOD: 1,066,676 VGOD has the authority to dispose of and vote the 1,066,676 shares of Common Stock that it directly owns, which power may be exercised by VGOD Portfolio GP, and by VGI, an affiliate of VGOD Portfolio GP, which provides managerial services to VGOD. Viking Global Opportunities Drawdown (Offshore) LP (a Cayman Islands exempted limited partnership) and Viking Global Opportunities Drawdown (Internal) LP (a Delaware limited partnership), through its investment in Viking Global Opportunities Drawdown (Onshore) LP (a Delaware limited partnership), invest substantially all of their assets in VGOD. O. Andreas Halvorsen, David C. Ott and Rose S. Shabet: 2,666,690 Mr. Halvorsen, Mr. Ott and Ms. Shabet, as Executive Committee Members of Viking Global Partners LLC (general partner of VGI) and Opportunities Parent, have shared authority to dispose of and vote the shares of Common Stock beneficially owned by VGI and Opportunities Parent. None of Mr. Halvorsen, Mr. Ott and Ms. Shabet directly owns any shares of Common Stock. Based on Rule 13d-3 under the Act, each may be deemed to beneficially own the shares of Common Stock that VGOP and VGOD directly own. Each of Mr. Halvorsen, Mr. Ott and Ms. Shabet beneficially owns 2,666,690 shares of Common Stock consisting of 1,600,014 and 1,066,676 shares of Common Stock directly owned by VGOP and VGOD, respectively.
(b)	Percent of class: The percentages set forth herein are based on 48,384,150 shares of Common Stock outstanding following the private placement of the Issuer that closed on September 19, 2025, as reported in the Issuer's current report on Form 8-K, filed with the Securities and Exchange Commission (the "Commission") on September 22, 2025. VGI: 5.5% Opportunities Parent: 5.5% Opportunities GP: 3.3% Opportunities Portfolio GP: 3.3% VGOP: 3.3% VGOD GP: 2.2% VGOD Portfolio GP: 2.2% VGOD: 2.2% O. Andreas Halvorsen, David C. Ott and Rose S. Shabet: 5.5%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: VGI: 0 Opportunities Parent: 0 Opportunities GP: 0 Opportunities Portfolio GP: 0 VGOP: 0 VGOD GP: 0 VGOD Portfolio GP: 0 VGOD: 0 O. Andreas Halvorsen, David C. Ott and Rose S. Shabet: 0
	(ii) Shared power to vote or to direct the vote: VGI: 2,666,690 Opportunities Parent: 2,666,690 Opportunities GP: 1,600,014 Opportunities Portfolio GP: 1,600,014 VGOP: 1,600,014 VGOD GP: 1,066,676 VGOD Portfolio GP: 1,066,676 VGOD: 1,066,676 O. Andreas Halvorsen, David C. Ott and Rose S. Shabet: 2,666,690
	(iii) Sole power to dispose or to direct the disposition of: VGI: 0 Opportunities Parent: 0 Opportunities GP: 0 Opportunities Portfolio GP: 0 VGOP: 0 VGOD GP: 0 VGOD Portfolio GP: 0 VGOD: 0 O. Andreas Halvorsen, David C. Ott and Rose S. Shabet: 0
	(iv) Shared power to dispose or to direct the disposition of: VGI: 2,666,690 Opportunities Parent: 2,666,690 Opportunities GP: 1,600,014 Opportunities Portfolio GP: 1,600,014 VGOP: 1,600,014 VGOD GP: 1,066,676 VGOD Portfolio GP: 1,066,676 VGOD: 1,066,676 O. Andreas Halvorsen, David C. Ott and Rose S. Shabet: 2,666,690
Item 5.	Ownership of 5 Percent or Less of a Class.
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. The response to Item 4 is incorporated by reference herein.
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.

VIKING GLOBAL INVESTORS LP

Signature:	/s/ Scott M. Hendler
Name/Title:	Scott M. Hendler on behalf of VIKING GLOBAL INVESTORS LP (1)(2)(3)
Date:	09/24/2025

Viking Global Opportunities Parent GP LLC

Signature:	/s/ Scott M. Hendler
Name/Title:	Scott M. Hendler on behalf of Viking Global Opportunities Parent GP LLC (1)(2)(3)
Date:	09/24/2025

Viking Global Opportunities GP LLC

Signature:	/s/ Scott M. Hendler
Name/Title:	Scott M. Hendler on behalf of Viking Global Opportunities GP LLC (1)(2)(3)
Date:	09/24/2025

Viking Global Opportunities Portfolio GP LLC

Signature:	/s/ Scott M. Hendler
Name/Title:	Scott M. Hendler on behalf of Viking Global Opportunities Portfolio GP LLC (1)(2)(3)
Date:	09/24/2025

Viking Global Opportunities Illiquid Investments Sub-Master LP

Signature:	/s/ Scott M. Hendler
Name/Title:	Scott M. Hendler on behalf of Viking Global Opportunities Illiquid Investments Sub-Master LP (1)(2)(3)
Date:	09/24/2025

Viking Global Opportunities Drawdown GP LLC

Signature:	/s/ Scott M. Hendler
Name/Title:	Scott M. Hendler on behalf of Viking Global Opportunities Drawdown GP LLC (1)(2)(3)
Date:	09/24/2025

Viking Global Opportunities Drawdown Portfolio GP LLC

Signature:	/s/ Scott M. Hendler
Name/Title:	Scott M. Hendler on behalf of Viking Global Opportunities Drawdown Portfolio GP LLC (1)(2)(3)
Date:	09/24/2025

Viking Global Opportunities Drawdown (Aggregator) LP

Signature:	/s/ Scott M. Hendler
Name/Title:	Scott M. Hendler on behalf of Viking Global Opportunities Drawdown (Aggregator) LP (1)(2)(3)
Date:	09/24/2025

HALVORSEN OLE ANDREAS

Signature:	/s/ Scott M. Hendler
Name/Title:	Scott M. Hendler on behalf of O. Andreas Halvorsen (1)
Date:	09/24/2025

Ott David C.

Signature:	/s/ Scott M. Hendler
Name/Title:	Scott M. Hendler on behalf of David C. Ott (2)
Date:	09/24/2025

Shabet Rose Sharon

Signature:	/s/ Scott M. Hendler
Name/Title:	Scott M. Hendler on behalf of Rose S. Shabet (3)
Date:	09/24/2025

Comments accompanying signature: (1) Scott M. Hendler is signing on behalf of O. Andreas Halvorsen, individually and as an Executive Committee Member of VIKING GLOBAL PARTNERS LLC, on behalf of VIKING GLOBAL INVESTORS LP, and as an Executive Committee Member of VIKING GLOBAL OPPORTUNITIES PARENT GP LLC, on behalf of itself and VIKING GLOBAL OPPORTUNITIES GP LLC, VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC, VIKING GLOBAL OPPORTUNITIES ILLIQUID INVESTMENTS SUB-MASTER LP, VIKING GLOBAL OPPORTUNITIES DRAWDOWN GP LLC, VIKING GLOBAL OPPORTUNITIES DRAWDOWN PORTFOLIO GP LLC and VIKING GLOBAL OPPORTUNITIES DRAWDOWN (AGGREGATOR) LP, pursuant to an authorization and designation letter dated February 9, 2021, which was previously filed with the Commission as an exhibit to a Form 13G filed by Mr. Halvorsen on February 12, 2021 (SEC File No. 005-49737). (2) Scott M. Hendler is signing on behalf of David C. Ott, individually and as an Executive Committee Member of VIKING GLOBAL PARTNERS LLC, on behalf of VIKING GLOBAL INVESTORS LP, and as an Executive Committee Member of VIKING GLOBAL OPPORTUNITIES PARENT GP LLC, on behalf of itself and VIKING GLOBAL OPPORTUNITIES GP LLC, VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC, VIKING GLOBAL OPPORTUNITIES ILLIQUID INVESTMENTS SUB-MASTER LP, VIKING GLOBAL OPPORTUNITIES DRAWDOWN GP LLC, VIKING GLOBAL OPPORTUNITIES DRAWDOWN PORTFOLIO GP LLC and VIKING GLOBAL OPPORTUNITIES DRAWDOWN (AGGREGATOR) LP, pursuant to an authorization and designation letter dated February 9, 2021, which was previously filed with the Commission as an exhibit to a Form 13G filed by Mr. Halvorsen on February 12, 2021 (SEC File No. 005-49737). (3) Scott M. Hendler is signing on behalf of Rose S. Shabet, individually and as an Executive Committee Member of VIKING GLOBAL PARTNERS LLC, on behalf of VIKING GLOBAL INVESTORS LP, and as an Executive Committee Member of VIKING GLOBAL OPPORTUNITIES PARENT GP LLC, on behalf of itself and VIKING GLOBAL OPPORTUNITIES GP LLC, VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC, VIKING GLOBAL OPPORTUNITIES ILLIQUID INVESTMENTS SUB-MASTER LP, VIKING GLOBAL OPPORTUNITIES DRAWDOWN GP LLC, VIKING GLOBAL OPPORTUNITIES DRAWDOWN PORTFOLIO GP LLC and VIKING GLOBAL OPPORTUNITIES DRAWDOWN (AGGREGATOR) LP, pursuant to an authorization and designation letter dated February 9, 2021, which was previously filed with the Commission as an exhibit to a Form 13G filed by Mr. Halvorsen on February 12, 2021 (SEC File No. 005-49737).

Exhibit Information

EXHIBIT A - JOINT FILING AGREEMENT

FAQ

What stake does Viking Global Investors report in Oruka Therapeutics (ORKA)?

The reporting group may be deemed to beneficially own 2,666,690 shares, representing 5.5% of the class based on 48,384,150 shares outstanding.

How is the 5.5% ownership split among Viking-related entities?

Viking Global Opportunities (VGOP) directly owns 1,600,014 shares (3.3%) and Viking Global Opportunities Drawdown (VGOD) directly owns 1,066,676 shares (2.2%).

Do any reporting persons claim sole voting or dispositive power over the ORKA shares?

No. The filing reports 0 sole voting power and 0 sole dispositive power for all reporting persons and lists only shared voting and dispositive power.

When was this Schedule 13G filed and what event date does it reference?

Signatures on the filing are dated 09/24/2025 and the filing references an event date of 09/17/2025 related to the disclosure.

Where are Oruka Therapeutics’ and the reporting persons’ principal offices listed?

Oruka’s principal executive office is listed as 855 Oak Grove Avenue, Suite 100, Menlo Park, CA. The reporting persons’ business address is 600 Washington Boulevard, Floor 11, Stamford, CT.