Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
289 institutional managers reported holding HAYW for the quarter ended Mar 31, 2026. Together they hold about 93% of shares outstanding; the top 10 hold 46%. 42 opened new positions; 36 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 24.00M | 10.79% | $321.1M | added +2.1% | 2021 Q2 |
| Vanguard Group | 21.17M | 9.52% | $283.2M | added +1.1% | 2021 Q1 |
| Fiduciary Management INC /WI/ | 8.74M | 3.93% | $116.9M | trimmed -3.9% | 2024 Q4 |
| FMR (Fidelity) | 8.65M | 3.89% | $115.7M | trimmed -17.2% | 2022 Q1 |
| Neuberger Berman Group LLC | 7.66M | 3.44% | $102.5M | added +5% | 2021 Q1 |
| Dimensional Fund Advisors | 7.45M | 3.35% | $99.7M | added +11.4% | 2022 Q1 |
| MIC Capital Management UK LLP (focused) | 6.57M | 2.96% | $87.9M | trimmed -21% | 2024 Q3 |
| Greenhouse Funds Lllp (focused) | 6.42M | 2.89% | $85.9M | added +7.8% | 2023 Q3 |
| American Century Companies INC | 6.28M | 2.82% | $84.0M | trimmed -9.8% | 2021 Q1 |
| State Street | 6.23M | 2.80% | $83.4M | added +3% | 2021 Q2 |
| Victory Capital Management INC | 6.20M | 2.79% | $83.0M | trimmed -5.8% | 2021 Q3 |
| Westwood Holdings Group INC | 4.84M | 2.18% | $64.7M | added +5.4% | 2025 Q2 |
| Jennison Associates LLC | 4.80M | 2.16% | $64.2M | added +1.9% | 2023 Q1 |
| Morgan Stanley | 4.55M | 2.05% | $60.9M | trimmed -11.6% | 2021 Q1 |
| Michael & Susan Dell Foundation (focused) | 4.34M | 1.95% | $58.1M | unchanged | 2024 Q3 |
| Brown Brothers Harriman & CO | 3.57M | 1.60% | $47.7M | added +523717.9% | 2024 Q4 |
| Invesco | 3.45M | 1.55% | $46.2M | trimmed -1.8% | 2021 Q2 |
| Geode Capital | 3.45M | 1.55% | $46.1M | added +3.8% | 2021 Q2 |
| Focus Partners Wealth | 3.34M | 1.50% | $44.6M | added +29.5% | 2024 Q4 |
| AQR Capital | 3.18M | 1.43% | $42.6M | trimmed -24% | 2024 Q3 |
| Arrowstreet Capital | 2.98M | 1.34% | $39.8M | added +25.6% | 2024 Q1 |
| Wellington Management | 2.71M | 1.22% | $36.3M | trimmed -32% | 2024 Q3 |
| Schroder Investment Management Group | 2.68M | 1.20% | $35.8M | trimmed -2% | 2023 Q2 |
| Bank OF America CORP /DE/ | 2.51M | 1.13% | $33.6M | trimmed -24% | 2021 Q1 |
| DF Dent & CO INC | 2.15M | 0.97% | $28.8M | trimmed -5.4% | 2024 Q3 |
| Trigran Investments, INC. (focused) | 2.14M | 0.96% | $28.6M | added +13.7% | 2024 Q2 |
| MFS Investment Management | 2.03M | 0.92% | $27.2M | trimmed -10.1% | 2022 Q4 |
| Charles Schwab Investment Management | 1.97M | 0.89% | $26.4M | added +2.4% | 2021 Q2 |
| Qube Research & Technologies LTD | 1.97M | 0.89% | $26.4M | added +160.5% | 2025 Q3 |
| Gotham Asset Management | 1.64M | 0.74% | $22.0M | trimmed -36.6% | 2021 Q4 |
| Northern Trust | 1.62M | 0.73% | $21.7M | trimmed -7.1% | 2021 Q2 |
| BNY Mellon | 1.60M | 0.72% | $21.4M | trimmed -3.1% | 2021 Q2 |
| Systematic Financial Management LP | 1.46M | 0.66% | $19.5M | trimmed -0.7% | 2022 Q4 |
| Goldman Sachs | 1.21M | 0.55% | $16.2M | added +165.6% | 2021 Q1 |
| UBS | 1.17M | 0.53% | $15.6M | trimmed -14.3% | 2021 Q2 |
| MetLife Investment Management, LLC | 1.09M | 0.49% | $14.6M | trimmed -17% | 2021 Q3 |
| Public Employees Retirement Association OF Colorado | 1.08M | 0.49% | $14.5M | unchanged | 2021 Q4 |
| Ameriprise Financial INC | 1.06M | 0.47% | $14.1M | trimmed -7% | 2021 Q1 |
| Trexquant Investment LP | 1.00M | 0.45% | $13.4M | added +105.7% | 2024 Q4 |
| William Blair Investment Management, LLC | 994.2k | 0.45% | $13.3M | trimmed -45.4% | 2025 Q3 |
| Principal Financial Group INC | 966.8k | 0.43% | $12.9M | added +2% | 2023 Q3 |
| Raymond James Financial INC | 918.6k | 0.41% | $12.3M | trimmed -1.6% | 2021 Q2 |
| Renaissance Technologies | 884.7k | 0.40% | $11.8M | added +44.9% | 2024 Q4 |
| Aperture Investors, LLC | 842.1k | 0.38% | $11.3M | trimmed -39.3% | 2024 Q4 |
| D. E. Shaw | 800.6k | 0.36% | $10.7M | added +1523.4% | 2021 Q2 |
| Granite Investment Partners, LLC | 772.4k | 0.35% | $10.3M | trimmed -2.9% | 2023 Q1 |
| Glenmede Trust CO NA | 756.7k | 0.34% | $10.1M | trimmed -10.5% | 2021 Q2 |
| Nuveen | 729.2k | 0.33% | $9.8M | added +3.4% | 2021 Q2 |
| Public Sector Pension Investment Board | 713.8k | 0.32% | $9.6M | added +3.3% | 2023 Q3 |
| WCM Investment Management | 701.9k | 0.32% | $9.4M | trimmed -46.2% | 2022 Q4 |
Largest 50 of 289 shown; the full ranked, searchable register is at boothcheck.com/holders/HAYW. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.