Who owns Waystar Holding (WAY)
Which tracked institutional funds hold WAY, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See WAY company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
Conviction spread
WAY’s largest tracked holder by dollar value, EQT Fund Management S.a r.l., sizes it at 59.2% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 59.2pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in WAY divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, we do not read how tracked institutions changed their WAY positions: many holders could not be matched across the two filings, most often because the security’s identifier changed and our mapping is incomplete, or because funds are still filing for the newer quarter. Over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| EQT Fund Management S.a r.l. | 24,879,437 | $511M | 12.1% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD | 19,025,452 | $391M | 9.3% | 2026-Q2 |
| BlackRock, Inc. added | 17,435,466 | $358M | 8.5% | 2026-Q2 |
| FMR LLC added | 15,045,567 | $309M | 7.3% | 2026-Q2 |
| Bain Capital Investors LLC | 13,243,539 | $272M | 6.5% | 2026-Q2 |
| Advent International, L.P. | 11,059,899 | $227M | 5.4% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 6,626,263 | $136M | 3.2% | 2026-Q2 |
| GOLDENTREE ASSET MANAGEMENT LP added | 6,160,110 | $126M | 3.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 5,200,460 | $107M | 2.5% | 2026-Q2 |
| BANK OF MONTREAL /CAN/ added | 5,189,386 | $107M | 2.5% | 2026-Q2 |
| STATE STREET CORP added | 4,572,108 | $94M | 2.2% | 2026-Q2 |
| Artisan Partners Limited Partnership trimmed | 3,679,251 | $76M | 1.8% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 3,652,355 | $75M | 1.8% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC trimmed | 3,634,210 | $75M | 1.8% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 3,088,690 | $63M | 1.5% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 2,938,152 | $60M | 1.4% | 2026-Q2 |
| UBS Group AG added | 2,884,399 | $59M | 1.4% | 2026-Q2 |
| Jupiter Topco LLC new | 2,871,893 | $59M | 1.4% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 2,660,854 | $55M | 1.3% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 2,583,119 | $53M | 1.3% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ added | 2,275,354 | $47M | 1.1% | 2026-Q2 |
| Diamond Hill Capital Management, LLC (Investment Advisor) added | 2,109,793 | $43M | 1.0% | 2026-Q2 |
| MORGAN STANLEY added | 1,986,453 | $41M | 1.0% | 2026-Q2 |
| BAMCO INC /NY/ trimmed | 1,787,600 | $37M | 0.9% | 2026-Q2 |
| FORT WASHINGTON INVESTMENT ADVISORS INC /OH/ added | 1,630,411 | $33M | 0.8% | 2026-Q2 |
| OBERWEIS ASSET MANAGEMENT INC/ added | 1,589,364 | $33M | 0.8% | 2026-Q2 |
| Clarkston Capital Partners, LLC added | 1,560,190 | $32M | 0.8% | 2026-Q2 |
| Greenvale Capital LLP new | 1,500,000 | $31M | 0.7% | 2026-Q2 |
| Capital Research Global Investors trimmed | 1,465,299 | $30M | 0.7% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 1,281,944 | $26M | 0.6% | 2026-Q2 |
| NORTHERN TRUST CORP added | 1,265,725 | $26M | 0.6% | 2026-Q2 |
| AVENIR CORP added | 1,144,717 | $24M | 0.6% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 1,078,601 | $22M | 0.5% | 2026-Q2 |
| ALTA FOX CAPITAL MANAGEMENT, LLC new | 1,039,000 | $21M | 0.5% | 2026-Q2 |
| PointState Capital LP trimmed | 1,030,502 | $21M | 0.5% | 2026-Q2 |
| Select Equity Group, L.P. added | 1,003,417 | $21M | 0.5% | 2026-Q2 |
| Blue Door Asset Management, LLC added | 974,000 | $20M | 0.5% | 2026-Q2 |
| Sio Capital Management, LLC trimmed | 925,834 | $19M | 0.5% | 2026-Q2 |
| CITIGROUP INC added | 909,148 | $19M | 0.4% | 2026-Q2 |
| BAIN CAPITAL VENTURE INVESTORS, LLC | 882,965 | $18M | 0.4% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 880,172 | $18M | 0.4% | 2026-Q2 |
| Sunriver Management LLC new | 855,000 | $18M | 0.4% | 2026-Q2 |
| SYSTEMATIC FINANCIAL MANAGEMENT LP new | 848,499 | $17M | 0.4% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 845,102 | $17M | 0.4% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 793,481 | $16M | 0.4% | 2026-Q2 |
| Bank of New York Mellon Corp added | 764,816 | $16M | 0.4% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO trimmed | 761,484 | $16M | 0.4% | 2026-Q2 |
| LOOMIS SAYLES & CO L P added | 663,156 | $14M | 0.3% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. added | 656,138 | $13M | 0.3% | 2026-Q2 |
| Longaeva Partners L.P. added | 631,729 | $13M | 0.3% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 586,668 | $12M | 0.3% | 2026-Q2 |
| ArrowMark Colorado Holdings LLC trimmed | 585,430 | $12M | 0.3% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 555,502 | $11M | 0.3% | 2026-Q2 |
| NORGES BANK trimmed | 554,218 | $11M | 0.3% | 2026-Q2 |
| RA CAPITAL MANAGEMENT, L.P. | 529,400 | $11M | 0.3% | 2026-Q2 |
| Mawer Investment Management Ltd. added | 480,069 | $10M | 0.2% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 458,926 | $9M | 0.2% | 2026-Q2 |
| PEREGRINE CAPITAL MANAGEMENT LLC added | 426,367 | $9M | 0.2% | 2026-Q2 |
| USS Investment Management Ltd new | 410,131 | $8M | 0.2% | 2026-Q2 |
| Public Sector Pension Investment Board trimmed | 395,398 | $8M | 0.2% | 2026-Q2 |
| Invesco Ltd. added | 391,662 | $8M | 0.2% | 2026-Q2 |
| Main Street Financial Solutions, LLC trimmed | 387,650 | $8M | 0.2% | 2026-Q2 |
| Nuveen, LLC added | 379,649 | $8M | 0.2% | 2026-Q2 |
| RENAISSANCE GROUP LLC added | 358,495 | $7M | 0.2% | 2026-Q2 |
| MARATHON CAPITAL MANAGEMENT new | 315,265 | $6M | 0.2% | 2026-Q2 |
| Bellevue Group AG added | 293,592 | $6M | 0.1% | 2026-Q2 |
| Weiss Asset Management LP new | 289,107 | $6M | 0.1% | 2026-Q2 |
| OSTERWEIS CAPITAL MANAGEMENT INC added | 281,360 | $6M | 0.1% | 2026-Q2 |
| FARALLON CAPITAL MANAGEMENT, L.L.C. trimmed | 264,900 | $5M | 0.1% | 2026-Q2 |
| Legal & General Group Plc added | 258,131 | $5M | 0.1% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 256,505 | $5M | 0.1% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 254,049 | $5M | 0.1% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 245,245 | $5M | 0.1% | 2026-Q2 |
| KENNEDY CAPITAL MANAGEMENT LLC added | 238,797 | $5M | 0.1% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 237,602 | $5M | 0.1% | 2026-Q2 |
| Swiss National Bank added | 230,700 | $5M | 0.1% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 218,149 | $4M | 0.1% | 2026-Q2 |
| Walleye Capital LLC trimmed | 215,664 | $4M | 0.1% | 2026-Q2 |
| Parkman Healthcare Partners LLC trimmed | 203,986 | $4M | 0.1% | 2026-Q2 |
| Qube Research & Technologies Ltd trimmed | 201,114 | $4M | 0.1% | 2026-Q2 |
| Roubaix Capital, LLC trimmed | 191,234 | $4M | 0.1% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 189,062 | $4M | 0.1% | 2026-Q2 |
| HSBC HOLDINGS PLC trimmed | 187,312 | $4M | 0.1% | 2026-Q2 |
| BLAIR WILLIAM & CO/IL added | 183,189 | $4M | 0.1% | 2026-Q2 |
| Rhenman & Partners Asset Management AB trimmed | 178,566 | $4M | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC added | 176,854 | $4M | 0.1% | 2026-Q2 |
| Mariner, LLC added | 176,297 | $4M | 0.1% | 2026-Q2 |
| KORNITZER CAPITAL MANAGEMENT INC /KS | 172,380 | $4M | 0.1% | 2026-Q2 |
| WINTON GROUP Ltd added | 169,913 | $3M | 0.1% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 169,608 | $3M | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 164,614 | $3M | 0.1% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. new | 138,100 | $3M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 137,022 | $3M | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 134,290 | $3M | 0.1% | 2026-Q2 |
| Gotham Asset Management, LLC trimmed | 130,940 | $3M | 0.1% | 2026-Q2 |
| Cerity Partners LLC trimmed | 130,072 | $3M | 0.1% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC added | 129,090 | $3M | 0.1% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 111,934 | $2M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 111,552 | $2M | 0.1% | 2026-Q2 |
| Caption Management, LLC added | 105,000 | $2M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.