Derby LuxCo S.a r.l. - Sep 12, 2025 Form 4 Insider Report for Waystar Holding Corp. (WAY)

Role: 10%+ Owner
Signature: Derby LuxCo S.a r.l., By: /s/ Sanjay Fullee, Name: Sanjay Fullee, Title: Manager and /s/ Tinatin Gogoladze, Name: Tinatin Gogoladze, Title: Manager
Stock symbol: WAY
Transactions as of: Sep 12, 2025
Transactions value $: -$304,508,310
Form type: 4
Date filed: 9/16/2025, 04:30 PM
Previous filing: May 20, 2025
SEC: View on sec.gov

Reporting Owners (2)

Name	Relationship	Address	Signature	Signature date	CIK
Derby LuxCo S.a r.l.	10%+ Owner	51A, BOULEVARD ROYAL,, LUXEMBOURG, GRAND DUCHY OF LUXEMBOURG, LUXEMBOURG	Derby LuxCo S.a r.l., By: /s/ Sanjay Fullee, Name: Sanjay Fullee, Title: Manager and /s/ Tinatin Gogoladze, Name: Tinatin Gogoladze, Title: Manager	2025-09-16	0001998443
EQT Fund Management S.a r.l.	10%+ Owner	51A, BOULEVARD ROYAL, LUXEMBOURG, GRAND DUCHY OF LUXEMBOURG, LUXEMBOURG	EQT Fund Management S.a r.l., By: /s/ Sara Huda, Name: Sara Huda, Title: Manager and /s/ Christiaan Snyders, Name: Christiaan Snyders, Title: Authorized Signatory	2025-09-16	0001834239

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	WAY	Common Stock	Sale	-$305M	-7.77M	-23.79%	$39.21	24.9M	Sep 12, 2025	Held directly by Derby LuxCo	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This amount represents the $39.21 sale price per share of Common Stock, par value $0.01 per share, in a secondary offering, which closed on September 12, 2025.
F2	Consists of shares of common stock held directly by Derby LuxCo S.a r.l. ("Derby LuxCo"). Several investment vehicles collectively make up the fund known as "EQT VIII." EQT VIII owns 100% of the membership interests in Derby LuxCo. EQT Fund Management S.a r.l. ("EFMS") has exclusive responsibility for the management and control of the business and affairs of investment vehicles which constitute the majority of the total commitments to EQT VIII. EFMS is overseen by a board of not less than three individuals that acts by majority approval.

Content

This amount represents the $39.21 sale price per share of Common Stock, par value $0.01 per share, in a secondary offering, which closed on September 12, 2025.

Consists of shares of common stock held directly by Derby LuxCo S.a r.l. ("Derby LuxCo"). Several investment vehicles collectively make up the fund known as "EQT VIII." EQT VIII owns 100% of the membership interests in Derby LuxCo. EQT Fund Management S.a r.l. ("EFMS") has exclusive responsibility for the management and control of the business and affairs of investment vehicles which constitute the majority of the total commitments to EQT VIII. EFMS is overseen by a board of not less than three individuals that acts by majority approval.

Remarks:

This filing shall not be deemed an admission that the Reporting Persons are beneficial owners of all securities covered by this filing for purposes of Section 16 of the Exchange Act or otherwise, and each Reporting Person disclaims beneficial ownership of these securities, except to the extent of such Reporting Person's pecuniary interest therein, if any.