Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
360 institutional managers reported holding SLAB for the quarter ended Mar 31, 2026. Together they hold about 91% of shares outstanding; the top 10 hold 48%. 102 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 | 4.99M | 15.15% | $1.04B | added +4.7% | ≤2013 |
| Vanguard Group | 3.90M | 11.82% | $811.7M | trimmed -2.5% | ≤2013 |
| State Street | 1.47M | 4.45% | $305.5M | trimmed -4.9% | ≤2013 |
| Balyasny Asset Management | 1.23M | 3.74% | $256.9M | opened | 2026 Q1 |
| Geode Capital | 851.4k | 2.58% | $177.3M | added +3.2% | ≤2013 |
| Capital Research Global Investors | 811.9k | 2.46% | $169.1M | unchanged | 2014 Q1 |
| Nomura Asset Management International INC. | 661.4k | 2.01% | $137.7M | trimmed -27.8% | 2025 Q4 |
| American Century Companies INC | 636.3k | 1.93% | $132.5M | trimmed -2.4% | 2020 Q3 |
| Morgan Stanley | 590.9k | 1.79% | $123.0M | added +45% | ≤2013 |
| AQR Capital | 583.2k | 1.77% | $121.4M | trimmed -10.7% | 2016 Q3 |
| Adage Capital Partners GP, L.l.c. | 566.3k | 1.72% | $117.9M | trimmed -8.1% | 2023 Q3 |
| Goldman Sachs | 520.0k | 1.58% | $108.3M | trimmed -12.2% | ≤2013 |
| Dimensional Fund Advisors | 509.5k | 1.55% | $106.1M | trimmed -2.3% | ≤2013 |
| Pentwater Capital Management LP | 500.0k | 1.52% | $104.1M | opened | 2026 Q1 |
| UBS | 460.6k | 1.40% | $95.9M | added +38.7% | ≤2013 |
| Millennium Management | 457.2k | 1.39% | $95.2M | added +5252.3% | 2015 Q4 |
| Pathstone Holdings, LLC | 425.0k | 1.29% | $88.5M | unchanged | 2020 Q4 |
| Invesco | 401.6k | 1.22% | $83.6M | trimmed -52.9% | ≤2013 |
| Charles Schwab Investment Management | 396.0k | 1.20% | $82.5M | trimmed -3.4% | ≤2013 |
| Northern Trust | 387.1k | 1.17% | $80.6M | added +2.3% | ≤2013 |
| Federated Hermes, INC. | 383.1k | 1.16% | $79.8M | trimmed -2.3% | ≤2013 |
| Thrivent Financial for Lutherans | 362.1k | 1.10% | $75.4M | trimmed -22.6% | 2015 Q2 |
| Citadel Advisors | 341.5k | 1.04% | $71.1M | added +2529.1% | 2025 Q2 |
| Mackenzie Financial CORP | 249.6k | 0.76% | $52.0M | trimmed -3.7% | 2020 Q2 |
| Magnetar Financial LLC | 245.8k | 0.75% | $51.2M | opened | 2025 Q3 |
| AllianceBernstein | 245.7k | 0.75% | $51.2M | added +98.3% | ≤2013 |
| Clearbridge Investments, LLC | 245.1k | 0.74% | $51.0M | trimmed -9.2% | 2021 Q2 |
| Assenagon Asset Management S.a. | 239.3k | 0.73% | $49.8M | added +395.2% | 2025 Q3 |
| LMR Partners LLP | 238.2k | 0.72% | $49.6M | added +693.9% | 2025 Q4 |
| Qube Research & Technologies LTD | 236.8k | 0.72% | $49.3M | opened | 2026 Q1 |
| Loomis Sayles & CO L P | 223.3k | 0.68% | $46.5M | trimmed -51.9% | ≤2013 |
| Alpine Associates Management INC. | 222.4k | 0.68% | $46.3M | opened | 2026 Q1 |
| BNY Mellon | 214.2k | 0.65% | $44.6M | trimmed -2.7% | ≤2013 |
| Hsbc Holdings PLC | 214.1k | 0.65% | $44.6M | added +1752.1% | 2017 Q3 |
| Stephens Investment Management Group LLC | 202.0k | 0.61% | $42.1M | trimmed -31.4% | 2018 Q1 |
| Bank OF America CORP /DE/ | 197.3k | 0.60% | $41.1M | trimmed -49.6% | ≤2013 |
| Kryger Capital LLC | 179.4k | 0.54% | $37.4M | opened | 2026 Q1 |
| Sona Asset Management (US) LLC | 175.1k | 0.53% | $36.5M | opened | 2026 Q1 |
| Healthcare OF Ontario Pension Plan Trust Fund | 172.2k | 0.52% | $35.9M | opened | 2026 Q1 |
| Renaissance Technologies | 155.1k | 0.47% | $32.3M | added +121.6% | 2025 Q3 |
| Allianz Asset Management GmbH | 154.0k | 0.47% | $32.1M | added +26.9% | 2024 Q2 |
| Davidson Investment Advisors | 144.5k | 0.44% | $30.1M | trimmed -0.9% | 2015 Q1 |
| TIG Advisors, LLC | 142.6k | 0.43% | $29.7M | opened | 2026 Q1 |
| Verition Fund Management | 139.5k | 0.42% | $29.0M | added +2524.7% | 2021 Q1 |
| Leeward Investments, LLC - MA | 122.6k | 0.37% | $25.5M | trimmed -3.2% | 2023 Q3 |
| Neuberger Berman Group LLC | 119.4k | 0.36% | $24.9M | added +5645.9% | 2019 Q3 |
| Nine Masts Capital LTD | 119.4k | 0.36% | $24.9M | opened | 2026 Q1 |
| Nuveen | 117.5k | 0.36% | $24.5M | unchanged | ≤2013 |
| Sand Grove Capital Management LLP (focused) | 112.4k | 0.34% | $23.4M | opened | 2026 Q1 |
| Tudor Investment | 112.3k | 0.34% | $23.4M | added +87.4% | 2025 Q3 |
Largest 50 of 360 shown; the full ranked, searchable register is at boothcheck.com/holders/SLAB. 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.