Waystar director granted 9,303 RSUs

Riefberg Vivian E. reported acquisition or exercise transactions in this Form 4 filing.

The filer has since corrected this document, so the figures below are the ones originally reported and some of them may have changed. Read the amended Form 4/A for what the company says now.

Rhea-AI Filing Summary

Riefberg Vivian E. reported acquisition or exercise transactions in this Form 4 filing.

Waystar Holding Corp. director Vivian E. Riefberg received an equity grant in the form of restricted stock units. The filing reports an award of 9,303 shares of Common Stock at a stated price of $0.00 per share, described in the footnotes as RSUs.

The RSUs vest on the earlier of June 1, 2027 or the first regularly scheduled annual stockholder meeting following the grant date, and each unit will settle into one share of Common Stock. After this award, Riefberg holds 23,132 shares, including unvested RSUs.

Insider Trade Summary

Grant/Award: 9,303 shares

Grant/Award 1 txn

Insider Riefberg Vivian E.

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	9,303	$0.00	$0.00

Holdings After Transaction: Common Stock — 23,132 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.
2. F2. Includes unvested RSUs.

Key Figures

RSU grant size: 9,303 shares Grant price: $0.00 per share Total holdings after grant: 23,132 shares +1 more

4 metrics

RSU grant size 9,303 shares Restricted stock units awarded to director on June 3, 2026

Grant price $0.00 per share Stated price for RSU award

Total holdings after grant 23,132 shares Director’s Waystar Common Stock holdings after transaction, including unvested RSUs

Vest date outside meeting June 1, 2027 Latest possible vesting date for RSUs, earlier if the next annual meeting occurs first

Key Terms

restricted stock units ("RSUs"), vest, contingent right, unvested RSUs

4 terms

restricted stock units ("RSUs") financial

"Reflects a grant of restricted stock units ("RSUs") which vest on the earlier of (i) June 1, 2027..."

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

vest financial

"RSUs which vest on the earlier of (i) June 1, 2027 and (ii) the first regularly scheduled annual meeting..."

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

contingent right financial

"Each RSU represents a contingent right to receive one share of Common Stock upon settlement."

unvested RSUs financial

"Includes unvested RSUs."

FAQ

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

What insider transaction did Waystar (WAY) report for Vivian E. Riefberg?

Waystar disclosed that director Vivian E. Riefberg received a grant of 9,303 restricted stock units. The award is recorded at a price of $0.00 per share and increases her reported holdings to 23,132 shares, including unvested RSUs.

How many shares did Vivian E. Riefberg acquire in the latest Waystar Form 4?

Vivian E. Riefberg acquired 9,303 shares in the form of restricted stock units. Each RSU represents a contingent right to receive one share of Common Stock upon settlement, subject to the vesting conditions described in the filing’s footnotes.

When do Vivian E. Riefberg’s new Waystar RSUs vest?

The RSUs vest on the earlier of June 1, 2027 or the first regularly scheduled annual stockholder meeting after the grant date. Vesting must occur before the RSUs settle into Common Stock, providing a timeline tied to board and shareholder events.

What are Vivian E. Riefberg’s total Waystar holdings after this RSU grant?

After the grant, Vivian E. Riefberg is reported as holding 23,132 shares of Waystar Common Stock. This figure includes both vested shares and unvested restricted stock units, as specifically noted in the Form 4 footnotes accompanying the transaction.

Does the Waystar Form 4 show a market purchase or sale by Vivian E. Riefberg?

The Form 4 reports a grant coded as an acquisition under transaction code A, not a market trade. It reflects compensation in restricted stock units with a stated price of $0.00 per share, rather than an open-market buy or sell transaction.

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

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Accepted by SEC EDGAR 06/03/2026 - 06:24 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)

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		9,303(1)	A	$0	23,132(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.

2. Includes unvested RSUs.

Remarks:

	/s/ Gregory R. Packer, as Attorney-in-Fact	06/03/2026
	** 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)