Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
262 institutional managers reported holding OMCL for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 60%. 39 opened new positions; 37 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 7.21M | 15.69% | $240.4M | trimmed -4.4% | ≤2013 |
| Vanguard Group | 5.52M | 12.01% | $184.0M | trimmed -0.7% | ≤2013 |
| Wellington Management | 2.71M | 5.89% | $90.3M | added +30.4% | ≤2013 |
| Dimensional Fund Advisors | 2.45M | 5.33% | $81.7M | added +6% | ≤2013 |
| Millennium Management | 2.29M | 4.98% | $76.3M | added +31.2% | 2018 Q4 |
| State Street | 1.95M | 4.25% | $65.1M | unchanged | ≤2013 |
| Lazard Asset Management LLC | 1.47M | 3.20% | $49.0M | trimmed -5.6% | 2021 Q3 |
| Sumitomo Mitsui Trust Group, INC. | 1.41M | 3.07% | $47.1M | added +2% | 2024 Q3 |
| Nomura Asset Management International INC. | 1.30M | 2.84% | $43.5M | trimmed -4.5% | 2020 Q3 |
| Geode Capital | 1.14M | 2.49% | $38.1M | added +1.3% | ≤2013 |
| Two Sigma | 1.05M | 2.29% | $35.1M | added +71.8% | 2022 Q3 |
| Charles Schwab Investment Management | 654.2k | 1.42% | $21.8M | added +3.3% | ≤2013 |
| Morgan Stanley | 616.6k | 1.34% | $20.6M | added +9% | 2013 Q3 |
| Bank OF America CORP /DE/ | 580.9k | 1.26% | $19.4M | added +31.3% | ≤2013 |
| D. E. Shaw | 534.6k | 1.16% | $17.8M | trimmed -41.4% | 2021 Q4 |
| Royal Bank OF Canada | 532.2k | 1.16% | $17.8M | trimmed -12.9% | ≤2013 |
| Boston Partners | 531.3k | 1.16% | $17.7M | added +18.7% | 2025 Q4 |
| Jacobs Levy Equity Management, INC | 502.7k | 1.09% | $16.8M | added +568.5% | 2025 Q1 |
| First Light Asset Management, LLC (focused) | 489.8k | 1.07% | $16.3M | opened | 2026 Q1 |
| Renaissance Technologies | 483.0k | 1.05% | $16.1M | added +47.8% | 2023 Q3 |
| Northern Trust | 477.1k | 1.04% | $15.9M | added +3.7% | ≤2013 |
| Liontrust Investment Partners LLP | 440.1k | 0.96% | $14.7M | unchanged | 2024 Q2 |
| BNY Mellon | 433.5k | 0.94% | $14.5M | added +53.8% | ≤2013 |
| Mirae Asset Global Etfs Holdings LTD. | 396.0k | 0.86% | $13.2M | trimmed -35.3% | 2020 Q3 |
| Nuveen | 388.6k | 0.85% | $13.0M | unchanged | 2018 Q4 |
| Acadian Asset Management | 382.8k | 0.83% | $12.8M | trimmed -38.7% | 2025 Q1 |
| FMR (Fidelity) | 370.7k | 0.81% | $12.4M | added +18.6% | 2018 Q3 |
| Goldman Sachs | 353.4k | 0.77% | $11.8M | added +3.4% | ≤2013 |
| Qube Research & Technologies LTD | 312.5k | 0.68% | $10.4M | added +22.6% | 2022 Q3 |
| Cramer Rosenthal Mcglynn LLC | 303.4k | 0.66% | $10.1M | added +21.6% | 2024 Q4 |
| WCM Investment Management | 302.4k | 0.66% | $10.1M | opened | 2026 Q1 |
| Principal Financial Group INC | 296.3k | 0.65% | $9.9M | added +9.8% | ≤2013 |
| Ameriprise Financial INC | 284.5k | 0.62% | $9.5M | trimmed -19.8% | ≤2013 |
| Arrowstreet Capital | 279.4k | 0.61% | $9.3M | added +45.4% | 2024 Q4 |
| Panagora Asset Management INC | 263.5k | 0.57% | $8.8M | added +25% | 2023 Q4 |
| Empowered Funds, LLC | 262.0k | 0.57% | $8.7M | added +4229.9% | 2025 Q4 |
| UBS | 260.7k | 0.57% | $8.7M | trimmed -6.4% | ≤2013 |
| Burney CO/ | 213.2k | 0.46% | $7.1M | opened | 2026 Q1 |
| Susquehanna International Group | 199.4k | 0.43% | $6.7M | added +2392% | 2018 Q4 |
| Invesco | 199.0k | 0.43% | $6.6M | added +1.4% | ≤2013 |
| Point72 | 186.1k | 0.41% | $6.2M | added +28.8% | 2024 Q4 |
| Bank OF Montreal /CAN/ | 179.3k | 0.39% | $6.0M | added +5.2% | ≤2013 |
| EVR Research LP (focused) | 173.0k | 0.38% | $5.8M | opened | 2026 Q1 |
| Public Sector Pension Investment Board | 160.6k | 0.35% | $5.4M | added +3.3% | 2023 Q3 |
| Legal & General Group PLC | 159.7k | 0.35% | $5.3M | trimmed -10.5% | 2014 Q3 |
| SEI Investments CO | 148.4k | 0.32% | $5.0M | added +21.1% | 2024 Q4 |
| Pier Capital, LLC | 143.1k | 0.31% | $4.8M | trimmed -1.9% | 2024 Q3 |
| Wells Fargo & COMPANY/MN | 140.0k | 0.30% | $4.7M | trimmed -21.6% | ≤2013 |
| Redmond Asset Management, LLC | 139.5k | 0.30% | $4.7M | unchanged | 2018 Q2 |
| Marshall Wace | 138.4k | 0.30% | $4.6M | added +392.1% | 2025 Q4 |
Largest 50 of 262 shown; the full ranked, searchable register is at boothcheck.com/holders/OMCL. 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.