Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
143 institutional managers reported holding IHS for the quarter ended Mar 31, 2026. Together they hold about 48% of shares outstanding; the top 10 hold 38%. 45 opened new positions; 30 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Wendel SE (focused) | 62.98M | 18.90% | $517.7M | unchanged | 2025 Q1 |
| Korea Investment CORP | 21.67M | 6.50% | $178.1M | unchanged | 2022 Q4 |
| UBS | 16.49M | 4.95% | $135.6M | added +4538% | 2021 Q4 |
| Quaker Capital Investments, LLC (focused) | 4.52M | 1.36% | $37.1M | trimmed -3.6% | 2023 Q1 |
| PSquared Asset Management AG (focused) | 4.34M | 1.30% | $35.7M | opened | 2026 Q1 |
| Hsbc Holdings PLC | 4.06M | 1.22% | $33.4M | opened | 2026 Q1 |
| Qube Research & Technologies LTD | 3.68M | 1.10% | $30.2M | added +845.6% | 2025 Q2 |
| Sand Grove Capital Management LLP (focused) | 3.42M | 1.03% | $28.1M | opened | 2026 Q1 |
| FIL LTD | 3.25M | 0.97% | $26.7M | opened | 2026 Q1 |
| Arrowstreet Capital | 2.59M | 0.78% | $21.3M | added +42.3% | 2025 Q1 |
| Two Sigma | 2.45M | 0.73% | $20.1M | added +132.9% | 2024 Q3 |
| Renaissance Technologies | 2.26M | 0.68% | $18.6M | added +61.1% | 2021 Q4 |
| Aberdeen Group plc | 1.87M | 0.56% | $15.3M | trimmed -16.4% | 2022 Q3 |
| Morgan Stanley | 1.55M | 0.47% | $12.7M | trimmed -34% | 2021 Q4 |
| Goldman Sachs | 1.48M | 0.45% | $12.2M | added +252.6% | 2021 Q4 |
| Acadian Asset Management | 1.46M | 0.44% | $12.0M | added +4.2% | 2024 Q4 |
| AQR Capital | 1.42M | 0.42% | $11.6M | opened | 2026 Q1 |
| Verition Fund Management | 1.25M | 0.37% | $10.2M | added +2422.6% | 2021 Q4 |
| Millennium Management | 1.14M | 0.34% | $9.4M | trimmed -67.5% | 2023 Q1 |
| Charles Schwab Investment Management | 1.08M | 0.32% | $8.8M | trimmed -19.5% | 2025 Q1 |
| Sona Asset Management (US) LLC | 901.3k | 0.27% | $7.4M | trimmed -41.9% | 2022 Q2 |
| AllianceBernstein | 874.0k | 0.26% | $7.2M | opened | 2026 Q1 |
| Magnetar Financial LLC | 745.2k | 0.22% | $6.1M | added +1161.2% | 2025 Q2 |
| Squarepoint Ops LLC | 715.8k | 0.21% | $5.9M | added +296.7% | 2024 Q2 |
| Prelude Capital Management, LLC | 632.3k | 0.19% | $5.2M | opened | 2024 Q3 |
| Groupe la Francaise | 619.8k | 0.19% | $5.1M | opened | 2026 Q1 |
| Point72 | 577.5k | 0.17% | $4.7M | added +210.9% | 2025 Q2 |
| Omers Administration CORP | 501.8k | 0.15% | $4.1M | opened | 2026 Q1 |
| Voloridge Investment Management | 499.3k | 0.15% | $4.1M | opened | 2026 Q1 |
| Credit Industriel ET Commercial | 455.3k | 0.14% | $3.7M | opened | 2026 Q1 |
| GAMCO (Gabelli) | 427.3k | 0.13% | $3.5M | opened | 2026 Q1 |
| Gabelli & CO Investment Advisers, INC. | 424.3k | 0.13% | $3.5M | opened | 2026 Q1 |
| BlackRock | 394.2k | 0.12% | $3.2M | added +7.9% | 2021 Q4 |
| Engineers Gate Manager LP | 362.4k | 0.11% | $3.0M | added +111.1% | 2024 Q4 |
| Hollow Brook Wealth Management LLC | 327.4k | 0.10% | $2.7M | trimmed -1.9% | 2025 Q2 |
| Y-Intercept (Hong Kong) LTD | 308.7k | 0.09% | $2.5M | added +65.2% | 2025 Q2 |
| Tudor Investment | 303.1k | 0.09% | $2.5M | added +24% | 2025 Q1 |
| Lazard Asset Management LLC | 290.2k | 0.09% | $2.4M | added +12.2% | 2025 Q4 |
| O'shaughnessy Asset Management, LLC | 270.7k | 0.08% | $2.2M | added +141.4% | 2025 Q4 |
| GSA Capital Partners LLP | 251.3k | 0.07% | $2.1M | trimmed -32.9% | 2025 Q1 |
| Quantbot Technologies LP | 225.6k | 0.07% | $1.9M | added +792.8% | 2025 Q1 |
| Boothbay Fund Management, LLC | 225.6k | 0.07% | $1.9M | opened | 2026 Q1 |
| Jane Street | 204.6k | 0.06% | $1.7M | added +23.3% | 2022 Q2 |
| Inspire Investing, LLC | 197.6k | 0.06% | $1.6M | added +15.4% | 2025 Q3 |
| D. E. Shaw | 182.7k | 0.06% | $1.5M | trimmed -57.5% | 2024 Q3 |
| Balyasny Asset Management | 181.3k | 0.05% | $1.5M | added +1167.4% | 2025 Q2 |
| Generali Asset Management SPA SGR | 180.0k | 0.05% | $1.5M | unchanged | 2024 Q4 |
| Sanctuary Advisors, LLC | 167.1k | 0.05% | $1.4M | opened | 2026 Q1 |
| HRT Financial LP | 166.7k | 0.05% | $1.4M | trimmed -45.7% | 2025 Q1 |
| Allianz Asset Management GmbH | 166.2k | 0.05% | $1.4M | trimmed -33.3% | 2025 Q2 |
Largest 50 of 143 shown; the full ranked, searchable register is at boothcheck.com/holders/IHS. 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.