Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
208 institutional managers reported holding HROW for the quarter ended Mar 31, 2026. Together they hold about 57% of shares outstanding; the top 10 hold 36%. 38 opened new positions; 41 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Opaleye Management INC. | 2.83M | 7.61% | $100.0M | trimmed -27.5% | 2020 Q2 |
| BlackRock | 2.55M | 6.86% | $90.1M | trimmed -0.6% | 2019 Q1 |
| Vanguard Group | 1.96M | 5.28% | $69.3M | added +2.2% | 2019 Q1 |
| Private Capital Management, LLC | 1.56M | 4.20% | $55.1M | trimmed -15.3% | 2022 Q2 |
| Luxor Capital Group, LP (focused) | 1.12M | 3.01% | $39.5M | added +22% | 2025 Q3 |
| State Street | 855.0k | 2.30% | $30.2M | added +9.1% | 2019 Q2 |
| Geode Capital | 852.0k | 2.29% | $30.1M | added +8.5% | 2019 Q1 |
| Marshall Wace | 644.9k | 1.73% | $22.8M | added +222% | 2025 Q1 |
| Dimensional Fund Advisors | 579.5k | 1.56% | $20.5M | added +56.4% | 2025 Q2 |
| Ikarian Capital, LLC | 543.0k | 1.46% | $19.2M | added +196.2% | 2025 Q4 |
| Susquehanna International Group | 457.8k | 1.23% | $16.2M | added +83.5% | 2019 Q1 |
| Penn Capital Management Company, LLC | 407.9k | 1.10% | $14.4M | added +4% | 2025 Q3 |
| Rice Hall James & Associates, LLC | 368.2k | 0.99% | $13.0M | added +1.7% | 2023 Q3 |
| Goldman Sachs | 341.7k | 0.92% | $12.1M | trimmed -6.8% | 2023 Q1 |
| Northern Trust | 296.9k | 0.80% | $10.5M | trimmed -1.3% | 2019 Q1 |
| Charles Schwab Investment Management | 270.5k | 0.73% | $9.5M | trimmed -0.8% | 2020 Q2 |
| NEW York State Common Retirement Fund | 268.5k | 0.72% | $9.5M | added +6.5% | 2023 Q2 |
| Stifel Financial CORP | 234.7k | 0.63% | $8.3M | added +10.4% | 2023 Q3 |
| UBS | 226.3k | 0.61% | $8.0M | trimmed -18.8% | 2019 Q1 |
| Citadel Advisors | 221.3k | 0.59% | $7.8M | trimmed -29.1% | 2021 Q2 |
| Crawford Fund Management, LLC (focused) | 193.3k | 0.52% | $6.8M | added +86.9% | 2025 Q4 |
| Westside Investment Management, INC. | 185.9k | 0.50% | $6.6M | added +2.5% | 2020 Q1 |
| Blackhawk Capital Partners, LLC | 172.3k | 0.46% | $6.1M | added +27.9% | 2025 Q3 |
| 12th Street Asset Management Company, LLC (focused) | 168.7k | 0.45% | $6.0M | added +85.2% | 2025 Q4 |
| Patient Square Capital LP (focused) | 165.2k | 0.44% | $5.8M | added +2249.7% | 2025 Q4 |
| Boothbay Fund Management, LLC | 158.1k | 0.42% | $5.6M | added +192.5% | 2025 Q4 |
| Braidwell LP | 156.4k | 0.42% | $5.5M | trimmed -47% | 2023 Q1 |
| First Trust Advisors LP | 154.1k | 0.41% | $5.4M | added +1.2% | 2025 Q2 |
| FirstWave Capital Management LLC (focused) | 143.9k | 0.39% | $5.1M | added +53.2% | 2025 Q4 |
| Morgan Stanley | 142.6k | 0.38% | $5.0M | trimmed -39% | 2019 Q1 |
| Diametric Capital, LP | 110.7k | 0.30% | $3.9M | trimmed -60.2% | 2019 Q1 |
| Woodmont Investment Counsel LLC | 110.6k | 0.30% | $3.9M | added +5% | 2023 Q3 |
| Bank OF America CORP /DE/ | 94.6k | 0.25% | $3.3M | trimmed -0.8% | 2020 Q1 |
| Group ONE Trading LLC | 92.0k | 0.25% | $3.2M | trimmed -15.3% | 2023 Q1 |
| Steward Partners Investment Advisory, LLC | 90.6k | 0.24% | $3.2M | added +8.3% | 2023 Q1 |
| Lumbard & Kellner, LLC | 88.6k | 0.24% | $3.1M | unchanged | 2025 Q3 |
| Wellington Management | 87.4k | 0.23% | $3.1M | trimmed -20.3% | 2022 Q4 |
| Panagora Asset Management INC | 86.1k | 0.23% | $3.0M | added +121.7% | 2024 Q3 |
| Renaissance Technologies | 84.6k | 0.23% | $3.0M | trimmed -19.4% | 2019 Q1 |
| Russell Investments Group, LTD. | 80.0k | 0.21% | $2.8M | trimmed -23% | 2024 Q3 |
| BNY Mellon | 78.7k | 0.21% | $2.8M | trimmed -2.8% | 2019 Q1 |
| Kennedy Capital Management LLC | 74.3k | 0.20% | $2.6M | added +10.5% | 2023 Q3 |
| Nuveen | 65.5k | 0.18% | $2.3M | added +3.9% | 2023 Q2 |
| Deutsche Bank AG\ | 64.6k | 0.17% | $2.3M | added +4.7% | 2019 Q4 |
| Swiss National Bank | 62.1k | 0.17% | $2.2M | unchanged | 2023 Q2 |
| Jefferson Bridge Capital, LLC | 57.2k | 0.15% | $2.0M | added +8.3% | 2025 Q4 |
| Captrust Financial Advisors | 56.8k | 0.15% | $2.0M | trimmed -18.8% | 2023 Q1 |
| Principal Financial Group INC | 51.9k | 0.14% | $1.8M | opened | 2026 Q1 |
| Squarepoint Ops LLC | 50.1k | 0.14% | $1.8M | trimmed -15.2% | 2023 Q1 |
| State OF Wisconsin Investment Board | 47.5k | 0.13% | $1.7M | trimmed -26% | 2023 Q2 |
Largest 50 of 208 shown; the full ranked, searchable register is at boothcheck.com/holders/HROW. 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.