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person · Reporting owner

Chan William

Disclosed activity across 1 company

Tapewire entity
61546
SEC CIK
0002091511

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Waystar Holding Corp.WAY · Entity 1420Chief Product & AI OfficerOctober 05, 2026October 06, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

Waystar Holding Corp.

Report date October 05, 2026 · Filed October 06, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect1,571,252 Reported balance After 2026-10-05 transaction · row 1 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 1 · 2026-10-05 · Tax withholding · Disposed 9,560 · Balance 1,571,252

F1: The transaction represents shares of common stock withheld to pay taxes upon vesting of restricted stock units (RSUs) granted to the Reporting Person on October 2, 2025. The number of shares withheld was determined based on the actual sale price of shares sold on October 5, 2026 pursuant to a "sell-to-cover" transaction.

F2: Includes unvested RSUs.

Filing footnotes · ownership attribution and instrument terms

F1: The transaction represents shares of common stock withheld to pay taxes upon vesting of restricted stock units (RSUs) granted to the Reporting Person on October 2, 2025. The number of shares withheld was determined based on the actual sale price of shares sold on October 5, 2026 pursuant to a "sell-to-cover" transaction.

F2: Includes unvested RSUs.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
October 05, 2026 Filed Oct 6, 2026 22:50 UTC Waystar Holding Corp. WAY · Entity 1420 Tax withholdingCommon Stock 9,560 $26.07 $249,229.20
Disclosure

SEC source: 0002091511-26-000004 · wk-form4_1791327022.xml · nonDerivative · entry 1

Chan William · CIK 0002091511 · Chief Product & AI Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,571,252

F1 · shares: The transaction represents shares of common stock withheld to pay taxes upon vesting of restricted stock units (RSUs) granted to the Reporting Person on October 2, 2025. The number of shares withheld was determined based on the actual sale price of shares sold on October 5, 2026 pursuant to a "sell-to-cover" transaction.

F2 · balance_after: Includes unvested RSUs.

Read SEC document
March 09, 2026 Filed Mar 11, 2026 18:41 UTC Waystar Holding Corp. WAY · Entity 1420 GrantCommon Stock 82,271 $0.00 $0.00
Disclosure

SEC source: 0002091511-26-000002 · wk-form4_1773268873.xml · nonDerivative · entry 1

Chan William · CIK 0002091511 · Chief Product & AI Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,580,812

F1 · shares: Reflects a grant of restricted stock units ("RSUs") which vests in four equal annual installments from the initial grant date through March 1, 2030. Each RSU represents a contingent right to receive one share of common stock, $0.01 par value per share (the "Common Stock") upon settlement.

F2 · balance_after: Reflects restricted stock units ("RSUs") that were issued to the reporting person on October 2, 2025 in connection with the acquisition of Iodine Software Holdings, Inc. by Waystar Holding Corp. These shares are subject to a lock-up agreement that restricts transfer for a period of six months following the closing of the acquisition.

F3 · balance_after: Includes unvested RSUs.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.