Capital World Investors reports 10.4% stake in NewAmsterdam

NewAmsterdam Pharma Company N.V. disclosure shows Capital World Investors amended its Schedule 13G to report beneficial ownership of 12,188,377 shares of Common Stock, equal to 10.4% of the 116,903,979 shares believed to be outstanding.

Rhea-AI Filing Summary

NewAmsterdam Pharma Company N.V. disclosure shows Capital World Investors amended its Schedule 13G to report beneficial ownership of 12,188,377 shares of Common Stock, equal to 10.4% of the 116,903,979 shares believed to be outstanding. The filing states CWI has sole voting and sole dispositive power over these shares.

Insights

Institutional Ownership Analyst

Large passive stake disclosed by Capital World Investors.

Capital World Investors reports beneficial ownership of 12,188,377 shares, representing 10.4% of the outstanding common stock as stated. The filing is an ownership disclosure under Schedule 13G/A and indicates voting and dispositive control rests with the reporting entity.

Implications depend on whether the stake is passive; subsequent filings or amendments would show changes. Future Schedule 13D/13G amendments will reveal any changes in intent or activism.

Corporate Governance Specialist

Stake size crosses common 10% monitoring thresholds.

The reported 10.4% ownership exceeds many disclosure thresholds that attract attention from issuers and governance teams. The filing lists sole voting and dispositive power of 12,188,377 shares and names related investment management entities in the statement.

Any change in voting intent or plans would typically appear in further amendments; timing and any coordination with other holders are not stated here.

Key Figures

Filing type: Schedule 13G/A (Amendment No. 3) Shares beneficially owned: 12,188,377 shares Percent of class: 10.4% +3 more

6 metrics

Filing type Schedule 13G/A (Amendment No. 3) ownership disclosure for Common Stock

Shares beneficially owned 12,188,377 shares Capital World Investors reported amount

Percent of class 10.4% of 116,903,979 shares believed outstanding

Shares outstanding (believed) 116,903,979 shares shares believed to be outstanding as stated in filing

Voting power 12,188,377 shares (sole) sole voting power reported by CWI

Dispositive power 12,188,377 shares (sole) sole dispositive power reported by CWI

Key Terms

Schedule 13G/A, beneficially owned, sole dispositive power, sole voting power

4 terms

Schedule 13G/A regulatory

"Amendment No. 3 to Schedule 13G appears as the filing type"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

beneficially owned financial

"CWI is deemed to be the beneficial owner of 12,188,377 shares"

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.

sole dispositive power regulatory

"Sole power to dispose or to direct the disposition of: 12,188,377"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

sole voting power regulatory

"Sole power to vote or to direct the vote: 12,188,377"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake does Capital World Investors hold in NewAmsterdam Pharma (NAMS)?

Capital World Investors reports beneficial ownership of 12,188,377 shares, equal to 10.4% of the 116,903,979 shares believed outstanding, per the Schedule 13G/A amendment.

Does Capital World Investors have voting control over the shares?

Yes. The filing states CWI has sole power to vote and sole power to dispose of 12,188,377 shares of NewAmsterdam Pharma common stock.

What document reports this ownership change for NAMS?

The ownership is disclosed in an Amendment No. 3 to Schedule 13G, filed to report beneficial ownership and related voting/dispositive powers for the common stock class.

Who signed the Schedule 13G/A amendment for this filing?

The amendment is signed by Jae Won Chung, Senior Vice President and Associate General Counsel of Capital Research and Management Company, dated 06/03/2026.

Is the reported 10.4% stake passive or activist?

The amendment reports ownership and voting/dispositive power only; it does not state whether the stake is passive or intends activist actions, and no change-of-intent language is included in the excerpt.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/04/2026 - 06:32 PM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

NewAmsterdam Pharma Company N.V.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

N62509109

(CUSIP Number)

05/29/2026

(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): N62509109

1

Names of Reporting Persons

Capital World Investors

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 12,188,377.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 12,188,377.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

12,188,377.00

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)

10.4 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: NewAmsterdam Pharma Company N.V.
(b)	Address of issuer's principal executive offices: Gooimeer 2-35, Naarden 1411 DC, Netherlands
Item 2.
(a)	Name of person filing: Capital World Investors
(b)	Address or principal business office or, if none, residence: 333 SOUTH HOPE STREET, 55TH FLOOR, LOS ANGELES, CALIFORNIA 90071
(c)	Citizenship: N/A
(d)	Title of class of securities: Common Stock
(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: 12,188,377 ** **Capital World Investors ("CWI") is a division of Capital Research and Management Company ("CRMC"), as well as its investment management subsidiaries and affiliates Capital Bank and Trust Company, Capital International, Inc., Capital International Limited, Capital International Sarl, Capital International K.K., Capital Group Private Client Services, Inc., and Capital Group Investment Management Private Limited (together with CRMC, the "investment management entities"). CWI's divisions of each of the investment management entities collectively provide investment management services under the name "Capital World Investors." CWI is deemed to be the beneficial owner of 12,188,377 shares or 10.4% of the 116,903,979 shares believed to be outstanding.
(b)	Percent of class: 10.4 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 12,188,377
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 12,188,377
	(iv) Shared power to dispose or to direct the disposition of: 0
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. SMALLCAP World Fund, Inc.
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 acquired and are held in the ordinary course of business and 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.

Capital World Investors

Signature:	Jae Won Chung
Name/Title:	Senior Vice President and Associate General Counsel, Capital Research and Management Company
Date:	06/03/2026