Viking Global discloses 3.7% NewAmsterdam Pharma (NAMS) holding in 13G/A

Rhea-AI Filing Summary

NewAmsterdam Pharma Co N.V. received an updated Schedule 13G/A (Amendment No. 3) from investment entities affiliated with Viking Global, disclosing their passive ownership in the company’s ordinary shares.

The Viking-related entities collectively report beneficial ownership of 4,203,567 ordinary shares, representing 3.7% of the outstanding class, based on 113,390,804 ordinary shares outstanding as of October 31, 2025. The shares are held through two main limited partnerships, which directly own 2,817,205 and 1,386,362 ordinary shares, respectively. Key individuals O. Andreas Halvorsen, David C. Ott and Rose S. Shabet are reported as having shared voting and dispositive power over these holdings through their roles in Viking’s general partner and parent entities.

The filing states that the securities were not acquired and are not held for the purpose of changing or influencing control of NewAmsterdam Pharma, indicating a passive investment stance under the 13G framework.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

NewAmsterdam Pharma Co N.V.

(Name of Issuer)

Ordinary Shares, nominal value EUR0.12 per share

(Title of Class of Securities)

N62509109

(CUSIP Number)

12/31/2025

(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. N62509109

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 4,203,567.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 4,203,567.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,203,567.00

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)

3.7 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. N62509109

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 4,203,567.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 4,203,567.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,203,567.00

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)

3.7 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. N62509109

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 2,817,205.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,817,205.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,817,205.00

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)

2.5 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. N62509109

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 2,817,205.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,817,205.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,817,205.00

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)

2.5 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. N62509109

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 2,817,205.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,817,205.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,817,205.00

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)

2.5 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. N62509109

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 1,386,362.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,386,362.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,386,362.00

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)

1.2 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. N62509109

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 1,386,362.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,386,362.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,386,362.00

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)

1.2 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. N62509109

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 1,386,362.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,386,362.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,386,362.00

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)

1.2 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. N62509109

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 4,203,567.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 4,203,567.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,203,567.00

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)

3.7 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. N62509109

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 4,203,567.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 4,203,567.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,203,567.00

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)

3.7 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: See Item 4

SCHEDULE 13G

CUSIP No. N62509109

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 4,203,567.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 4,203,567.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,203,567.00

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)

3.7 %

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: NewAmsterdam Pharma Co N.V.
(b)	Address of issuer's principal executive offices: Gooimeer 2-35, Naarden, Netherlands, 1411 DC
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: Ordinary Shares, nominal value EUR0.12 per share
(e)	CUSIP No.: N62509109
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: 4,203,567 VGI provides managerial services to VGOP and VGOD. VGI has the authority to dispose of and vote the Ordinary Shares that VGOP and VGOD directly own. VGI does not directly own any Ordinary Shares. Based on Rule 13d-3 under the Securities Exchange Act of 1934, as amended (the "Act"), VGI may be deemed to beneficially own the Ordinary Shares that VGOP and VGOD directly own. VGI beneficially owns 4,203,567 Ordinary Shares consisting of 2,817,205 Ordinary Shares directly owned by VGOP and 1,386,362 Ordinary Shares directly owned by VGOD. Opportunities Parent: 4,203,567 Opportunities Parent is the sole member of Opportunities GP, which has the authority to dispose of and vote the Ordinary Shares controlled by Opportunities Portfolio GP (which consists of the Ordinary Shares that VGOP directly owns), and is the sole member of VGOD GP, which has the authority to dispose of and vote the Ordinary Shares controlled by VGOD Portfolio GP (which consists of the Ordinary Shares that VGOD directly owns). Opportunities Parent does not directly own any Ordinary Shares. Based on Rule 13d-3 of the Act, Opportunities Parent may be deemed to beneficially own the Ordinary Shares that VGOP and VGOD directly own. Opportunities Parent beneficially owns 4,203,567 Ordinary Shares consisting of 2,817,205 Ordinary Shares directly owned by VGOP and 1,386,362 Ordinary Shares directly owned by VGOD. Opportunities GP: 2,817,205 Opportunities GP serves as the sole member of Opportunities Portfolio GP and has the authority to dispose of and vote the Ordinary Shares controlled by Opportunities Portfolio GP, which consists of the Ordinary Shares 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 Ordinary Shares. Based on Rule 13d-3 of the Act, Opportunities GP may be deemed to beneficially own the Ordinary Shares that VGOP directly owns. Opportunities GP beneficially owns 2,817,205 Ordinary Shares consisting of 2,817,205 Ordinary Shares directly owned by VGOP. Opportunities Portfolio GP: 2,817,205 Opportunities Portfolio GP serves as the general partner of VGOP and has the authority to dispose of and vote the Ordinary Shares that VGOP directly owns. Opportunities Portfolio GP does not directly own any Ordinary Shares. Based on Rule 13d-3 of the Act, Opportunities Portfolio GP may be deemed to beneficially own the Ordinary Shares that VGOP directly owns. Opportunities Portfolio GP beneficially owns 2,817,205 Ordinary Shares consisting of 2,817,205 Ordinary Shares directly owned by VGOP. VGOP: 2,817,205 VGOP has the authority to dispose of and vote the 2,817,205 Ordinary Shares that it directly 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: 1,386,362 VGOD GP serves as the sole member of VGOD Portfolio GP and has the authority to dispose of and vote the Ordinary Shares controlled by VGOD Portfolio GP, which consists of the Ordinary Shares 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 Ordinary Shares. Based on Rule 13d-3 of the Act, VGOD GP may be deemed to beneficially own the Ordinary Shares that VGOD directly owns. VGOD GP beneficially owns 1,386,362 Ordinary Shares consisting of 1,386,362 Ordinary Shares directly owned by VGOD. VGOD Portfolio GP: 1,386,362 VGOD Portfolio GP serves as the general partner of VGOD and has the authority to dispose of and vote the Ordinary Shares that VGOD directly owns. VGOD Portfolio GP does not directly own any Ordinary Shares. Based on Rule 13d-3 of the Act, VGOD Portfolio GP may be deemed to beneficially own the Ordinary Shares that VGOD directly owns. VGOD Portfolio GP beneficially owns 1,386,362 Ordinary Shares consisting of 1,386,362 Ordinary Shares directly owned by VGOD. VGOD: 1,386,362 VGOD has the authority to dispose of and vote the 1,386,362 Ordinary Shares that it directly owns, which power may be exercised by its general partner, 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: 4,203,567 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 Ordinary Shares beneficially owned by VGI and Opportunities Parent. None of Mr. Halvorsen, Mr. Ott and Ms. Shabet directly owns any Ordinary Shares. Based on Rule 13d-3 of the Act, each may be deemed to beneficially own the Ordinary Shares that VGOP and VGOD directly own. Mr. Halvorsen, Mr. Ott and Ms. Shabet each beneficially own 4,203,567 Ordinary Shares consisting of 2,817,205 Ordinary Shares directly owned by VGOP and 1,386,362 Ordinary Shares directly owned by VGOD.
(b)	Percent of class: The percentages set forth herein are based on 113,390,804 Ordinary Shares outstanding as of October 31, 2025, as reported by the Issuer in its quarterly report on Form 10-Q, filed with the U.S. Securities and Exchange Commission (the "Commission") on November 5, 2025. VGI: 3.7% Opportunities Parent: 3.7% Opportunities GP: 2.5% Opportunities Portfolio GP: 2.5% VGOP: 2.5% VGOD GP: 1.2% VGOD Portfolio GP: 1.2% VGOD: 1.2% O. Andreas Halvorsen, David C. Ott and Rose S. Shabet: 3.7%
(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: 4,203,567 Opportunities Parent: 4,203,567 Opportunities GP: 2,817,205 Opportunities Portfolio GP: 2,817,205 VGOP: 2,817,205 VGOD GP: 1,386,362 VGOD Portfolio GP: 1,386,362 VGOD: 1,386,362 O. Andreas Halvorsen, David C. Ott and Rose S. Shabet: 4,203,567
	(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: 4,203,567 Opportunities Parent: 4,203,567 Opportunities GP: 2,817,205 Opportunities Portfolio GP: 2,817,205 VGOP: 2,817,205 VGOD GP: 1,386,362 VGOD Portfolio GP: 1,386,362 VGOD: 1,386,362 O. Andreas Halvorsen, David C. Ott and Rose S. Shabet: 4,203,567
Item 5.	Ownership of 5 Percent or Less of a Class.
	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:	02/17/2026

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:	02/17/2026

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:	02/17/2026

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:	02/17/2026

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:	02/17/2026

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:	02/17/2026

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:	02/17/2026

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:	02/17/2026

HALVORSEN OLE ANDREAS

Signature:	/s/ Scott M. Hendler
Name/Title:	Scott M. Hendler on behalf of O. Andreas Halvorsen (1)
Date:	02/17/2026

Ott David C.

Signature:	/s/ Scott M. Hendler
Name/Title:	Scott M. Hendler on behalf of David C. Ott (2)
Date:	02/17/2026

Shabet Rose Sharon

Signature:	/s/ Scott M. Hendler
Name/Title:	Scott M. Hendler on behalf of Rose S. Shabet (3)
Date:	02/17/2026

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 report in NewAmsterdam Pharma (NAMS)?

Viking-affiliated entities report beneficial ownership of 4,203,567 ordinary shares of NewAmsterdam Pharma, equal to 3.7% of the outstanding class. This percentage is based on 113,390,804 ordinary shares outstanding as of October 31, 2025, per the issuer’s Form 10-Q.

Which Viking entities are listed as reporting persons for NAMS?

Reporting persons include Viking Global Investors LP, multiple Viking Global Opportunities entities (Parent, GP, Portfolio GP, Illiquid Investments Sub-Master, Drawdown GP, Drawdown Portfolio GP, Drawdown Aggregator), and individuals O. Andreas Halvorsen, David C. Ott, and Rose S. Shabet, all acting together as a reporting group.

How are Viking’s NewAmsterdam Pharma (NAMS) shares held and controlled?

The filing shows 2,817,205 shares directly owned by VGOP and 1,386,362 shares directly owned by VGOD. Various Viking general partner and parent entities, along with key executives, have shared voting and dispositive power over these positions under Rule 13d-3’s beneficial ownership framework.

Is Viking Global’s position in NAMS a passive investment?

Yes. The certification states the securities were not acquired and are not held to change or influence control of NewAmsterdam Pharma. Instead, they are reported on Schedule 13G/A, which is typically used for investors taking a passive ownership approach under SEC rules.

Why does each Viking entity show different ownership percentages in NAMS?

Percentages reflect each entity’s deemed beneficial ownership under Rule 13d-3. For example, VGI and Opportunities Parent each report 3.7%, while certain subsidiary entities report 2.5% or 1.2%, depending on whether they are linked only to VGOP, only to VGOD, or to both partnerships.

What share count did Viking use to calculate its NAMS ownership percentage?

The percentages are based on 113,390,804 ordinary shares outstanding as of October 31, 2025. This figure comes from NewAmsterdam Pharma’s quarterly report on Form 10-Q filed with the SEC on November 5, 2025, as referenced in the ownership section.