Paul G. Moskowitz - 12 Sep 2025 Form 4 Insider Report for Waystar Holding Corp. (WAY)

Reporting relationship: Director, 10%+ Owner
Issuer ticker: WAY
Reported as of: 12 Sep 2025
Net transaction value: -$168,412,400
SEC form: 4
Accepted by SEC: 16 Sep 2025, 16:30:10 UTC
Prior SEC filing: 20 May 2025
Source filing: View source filing
Reporting owner signature: /s/ Paul Moskowitz

Key filing fact

Paul G. Moskowitz filed Form 4 for Waystar Holding Corp. (WAY) on 16 Sep 2025.

Key facts

This page summarizes Paul G. Moskowitz's Form 4 filing for Waystar Holding Corp. (WAY).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 16 Sep 2025, 16:30.

Change

Previous filing in this sequence was filed on 20 May 2025.
Current net transaction value: -$168,412,400.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001997404 Primary reporting owner

Moskowitz Paul G

Relationship: Director, 10%+ Owner
Address: C/O BAIN CAPITAL PRIVATE EQUITY, LP, 200 CLARENDON STREET, BOSTON
Signature: /s/ Paul Moskowitz
Signature date: 16 Sep 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

WAY transaction

Common Stock, par value $0.01 per share

Sale

Transaction value: $168,412,400
Shares: -4,295,139
Change %: -24%
Price: $39.21
Shares after: 13,759,910
Date: 12 Sep 2025
Ownership: See Footnote
Footnotes: F1, F2, F3

WAY transaction

Common Stock, par value $0.01 per share

Other

Transaction value
Shares: -516,371
Change %: -3.8%
Price
Shares after: 13,243,539
Date: 12 Sep 2025
Ownership: See Footnote
Footnotes: F1, F2, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Represents shares held by BCPE Derby Investor, LP ("Derby Investor") and BCPE Derby (DE) SPV, LP ("Derby SPV Investor"). Bain Capital Investors, LLC ("BCI") is the manager of Bain Capital Partners XI, L.P. ("Partners XI"), which is the general partner of Bain Capital Fund XI, L.P. ("Fund XI"). Fund XI is the (i) sole member of BCPE Derby GP, LLC ("Derby GP"), which is the general partner of Derby Investor and (ii) sole member of BCPE Derby (DE) SPV, LLC ("Derby SPV GP" and, together with BCI, Partners XI, Fund XI, Derby GP, Derby Investor and Derby SPV Investor, the "Bain Capital Entities"), which is the general partner of Derby SPV Investor.

Footnote F2

(Continued from footnote 1) Paul G Moskowitz, a member of the board of directors of Waystar Holding Corp. (the "Issuer"), is a Partner of BCI. By virtue of the relationships described in this footnote, Mr. Moskowitz may be deemed to share voting and dispositive power with respect to the shares of the Issuer's common stock, par value $0.01 per share (the "Common Stock"), held by the Bain Capital Entities. Mr. Moskowitz disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

Footnote F3

Pursuant to a registered public offering that closed on September 12, 2025, 298,303 shares of Common Stock were sold by Derby Investor and 3,996,836 shares of Common Stock were sold by Derby SPV Investor at a price of $39.21 (net of underwriting discount).

Footnote F4

On September 12, 2025, Derby Investor distributed 397,013 shares of Common Stock and Derby SPV Investor distributed 119,358 shares of Common Stock to one or more of their respective members or partners in connection with certain charitable gifts made by such members or partners or their direct or indirect owners. Such shares of Common Stock are subject to lock-up agreements that, subject to certain exceptions, restrict the sale of such shares until November 11, 2025 except with the prior written consent of J.P. Morgan Securities LLC.