Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
265 institutional managers reported holding ICUI for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 59%. 31 opened new positions; 53 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 3.61M | 14.33% | $466.4M | added +0.6% | ≤2013 |
| Vanguard Group | 2.76M | 10.95% | $356.2M | added +1.5% | ≤2013 |
| Janus Henderson | 2.68M | 10.63% | $345.9M | added +3.9% | 2015 Q1 |
| Fuller & Thaler Asset Management, INC. | 1.22M | 4.85% | $157.8M | trimmed -3.6% | 2022 Q2 |
| Dimensional Fund Advisors | 983.8k | 3.91% | $127.2M | added +6.8% | ≤2013 |
| State Street | 968.1k | 3.84% | $125.1M | added +2.7% | ≤2013 |
| Schroder Investment Management Group | 701.3k | 2.79% | $90.6M | trimmed -8.4% | 2020 Q1 |
| River Road Asset Management, LLC | 646.4k | 2.57% | $83.6M | trimmed -0.7% | 2025 Q1 |
| Geode Capital | 611.2k | 2.43% | $79.0M | added +3% | ≤2013 |
| Ameriprise Financial INC | 605.7k | 2.40% | $78.3M | trimmed -8.4% | ≤2013 |
| Morgan Stanley | 526.8k | 2.09% | $68.1M | added +1.6% | ≤2013 |
| Neuberger Berman Group LLC | 446.4k | 1.77% | $57.7M | trimmed -20.8% | 2016 Q4 |
| Thrivent Financial for Lutherans | 433.5k | 1.72% | $56.0M | added +42.9% | 2025 Q3 |
| Citadel Advisors | 333.3k | 1.32% | $43.1M | added +58.1% | 2025 Q4 |
| Bank OF America CORP /DE/ | 331.7k | 1.32% | $42.9M | added +11.2% | ≤2013 |
| Silvercrest Asset Management Group LLC | 323.7k | 1.28% | $41.8M | trimmed -14.9% | ≤2013 |
| Goldman Sachs | 322.7k | 1.28% | $41.7M | added +13.4% | ≤2013 |
| Charles Schwab Investment Management | 322.5k | 1.28% | $41.7M | added +4.2% | ≤2013 |
| FMR (Fidelity) | 312.9k | 1.24% | $40.4M | trimmed -13.7% | 2017 Q4 |
| Nomura Asset Management International INC. | 294.3k | 1.17% | $38.0M | added +7.7% | 2025 Q4 |
| Northern Trust | 293.7k | 1.17% | $38.0M | trimmed -13.3% | ≤2013 |
| Federated Hermes, INC. | 257.5k | 1.02% | $33.3M | added +4.2% | 2014 Q4 |
| Defilade Capital Management, L.p. (focused) | 254.3k | 1.01% | $32.9M | trimmed -25.4% | 2025 Q4 |
| Wellington Management | 243.1k | 0.96% | $31.4M | trimmed -2.1% | ≤2013 |
| Brown Advisory INC | 241.8k | 0.96% | $31.2M | added +6.3% | 2025 Q4 |
| Segall Bryant & Hamill, LLC | 223.6k | 0.89% | $28.9M | trimmed -15.6% | 2017 Q3 |
| William Blair Investment Management, LLC | 217.9k | 0.86% | $28.2M | added +3.4% | 2025 Q2 |
| Quantinno Capital Management LP | 215.5k | 0.86% | $27.9M | trimmed -22.7% | 2023 Q3 |
| Toronto Dominion Bank | 208.9k | 0.83% | $27.0M | opened | 2026 Q1 |
| Oberweis Asset Management INC/ | 203.7k | 0.81% | $26.3M | added +21.2% | 2024 Q3 |
| UBS | 193.6k | 0.77% | $25.0M | trimmed -27.8% | ≤2013 |
| Raymond James Financial INC | 192.9k | 0.77% | $24.9M | added +10.7% | 2014 Q3 |
| BNY Mellon | 175.2k | 0.70% | $22.6M | trimmed -3.5% | ≤2013 |
| Victory Capital Management INC | 174.9k | 0.69% | $22.6M | trimmed -2.6% | 2019 Q3 |
| Manufacturers Life Insurance Company, THE | 170.4k | 0.68% | $22.0M | added +1394% | ≤2013 |
| Woodline Partners LP | 164.3k | 0.65% | $21.2M | unchanged | 2019 Q4 |
| Principal Financial Group INC | 143.2k | 0.57% | $18.5M | added +2.2% | ≤2013 |
| Kennedy Capital Management LLC | 126.0k | 0.50% | $16.3M | trimmed -1.6% | 2016 Q4 |
| Invesco | 99.6k | 0.40% | $12.9M | trimmed -0.9% | ≤2013 |
| WCM Investment Management | 92.0k | 0.36% | $11.9M | trimmed -44.3% | 2021 Q2 |
| Nuveen | 88.5k | 0.35% | $11.4M | trimmed -25.9% | 2019 Q2 |
| Public Sector Pension Investment Board | 88.4k | 0.35% | $11.4M | added +3.5% | 2023 Q4 |
| Point72 | 83.2k | 0.33% | $10.7M | trimmed -75.4% | 2023 Q4 |
| Glenmede Trust CO NA | 78.4k | 0.31% | $10.1M | trimmed -11.2% | 2015 Q2 |
| Public Employees Retirement Association OF Colorado | 69.5k | 0.28% | $9.0M | added +2661.9% | 2015 Q3 |
| Rhumbline Advisers | 68.6k | 0.27% | $8.9M | added +0.7% | ≤2013 |
| Qube Research & Technologies LTD | 68.3k | 0.27% | $8.8M | added +263.3% | 2024 Q4 |
| Millennium Management | 67.6k | 0.27% | $8.7M | trimmed -22.4% | 2022 Q4 |
| GAMCO (Gabelli) | 63.8k | 0.25% | $8.2M | trimmed -7% | ≤2013 |
| Jane Street | 62.5k | 0.25% | $8.1M | added +13.4% | 2019 Q2 |
Largest 50 of 265 shown; the full ranked, searchable register is at boothcheck.com/holders/ICUI. 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.