Waystar corrects director's stock grant to 10,446

The director's RSUs vest on the earlier of June 1, 2027, and the first regularly scheduled annual meeting of stockholders after the grant date.

This filing corrects an earlier one, and you can read the original Form 4 if you want to see what changed.

Rhea-AI Filing Summary

Waystar Holding Corp. (symbol: WAY) is the issuer of record for a Form 4/A filing submitted to the SEC. Riefberg Vivian E. reported acquisition or exercise transactions in this Form 4 filing.

Waystar Holding Corp. (WAY) director Vivian E. Riefberg was granted 10,446 restricted stock units (RSUs) on June 3, 2026. The amended report corrects the grant count from 9,303 to 10,446. Her reported direct position after the grant was 24,275 shares, including unvested RSUs. The RSUs vest on the earlier of June 1, 2027, and the first regularly scheduled annual meeting of stockholders following the grant date; each RSU represents a contingent right to receive one Common Stock share upon settlement. No Rule 10b5-1 plan is reported.

Insider Trade Summary

Grant/Award: 10,446 shares

Grant/Award 1 txn

Insider Riefberg Vivian E.

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1, F2	10,446	$0.00	$0.00

Holdings After Transaction: Common Stock — 24,275 shares (Direct)

Footnotes (2)

1. F1. Reflects a grant of restricted stock units ("RSUs") which vest on the earlier of (i) June 1, 2027 and (ii) the first regularly scheduled annual meeting of the stockholders following the grant date. Each RSU represents a contingent right to receive one share of Common Stock upon settlement. This amended Form 4 is being filed solely to correct the number of RSUs granted from 9,303 to 10,446.
2. F2. Includes unvested RSUs.

Key Figures

RSUs granted: 10,446 RSUs Reported direct position: 24,275 shares Corrected prior grant count: 9,303 RSUs +1 more

4 metrics

RSUs granted 10,446 RSUs Grant dated June 3, 2026

Reported direct position 24,275 shares After the grant; includes unvested RSUs

Corrected prior grant count 9,303 RSUs The amended report corrected this count to 10,446

Shares per RSU 1 Common Stock share Contingent right upon settlement

Key Terms

restricted stock units, contingent right, settlement

3 terms

restricted stock units financial

"grant of restricted stock units ("RSUs") which vest"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

contingent right financial

"Each RSU represents a contingent right to receive one share"

settlement financial

"upon settlement"

Settlement is the process of completing a financial transaction, like buying or selling a stock, by transferring money and ownership between parties. It ensures that both the buyer gets the asset and the seller gets paid, making the deal official. Without settlement, the transaction wouldn't be finalized or legally recognized.

FAQ

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

How many RSUs did WAY director Vivian E. Riefberg receive?

Vivian E. Riefberg, a Waystar director, was granted 10,446 RSUs on June 3, 2026; the amended report corrected the prior grant count from 9,303 RSUs.

When do Vivian E. Riefberg's WAY RSUs vest?

The RSUs vest on the earlier of June 1, 2027, and the first regularly scheduled annual meeting of stockholders following the June 3, 2026 grant date. Each RSU is a contingent right to receive one Common Stock share upon settlement.

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

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Available on EDGAR 09/25/2026 - 12:38 PM Accepted by SEC EDGAR 09/25/2026 - 12:37 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Riefberg Vivian E.

(Last) (First) (Middle)

1550 DIGITAL DRIVE, #300

(Street)

LEHI UTAH 84043

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Waystar Holding Corp. [ WAY ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/03/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)
06/03/2026

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	06/03/2026		A		10,446(1)	A	$0	24,275(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Reflects a grant of restricted stock units ("RSUs") which vest on the earlier of (i) June 1, 2027 and (ii) the first regularly scheduled annual meeting of the stockholders following the grant date. Each RSU represents a contingent right to receive one share of Common Stock upon settlement. This amended Form 4 is being filed solely to correct the number of RSUs granted from 9,303 to 10,446.

2. Includes unvested RSUs.

Remarks:

	/s/ Gregory R. Packer, as Attorney-in-Fact	09/25/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)