Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
407 institutional managers reported holding SITM for the quarter ended Mar 31, 2026. Together they hold about 87% of shares outstanding; the top 10 hold 52%. 79 opened new positions; 61 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| FMR (Fidelity) | 3.95M | 15.01% | $1.37B | added +18.1% | 2019 Q4 |
| BlackRock | 2.88M | 10.94% | $995.5M | trimmed -14.7% | 2020 Q1 |
| Vanguard Group | 2.58M | 9.79% | $891.4M | trimmed -8.8% | 2020 Q1 |
| State Street | 924.8k | 3.51% | $319.6M | added +0.7% | 2020 Q1 |
| T. Rowe Price | 683.8k | 2.60% | $236.3M | added +21.5% | 2020 Q4 |
| Geode Capital | 624.7k | 2.37% | $215.9M | added +15.8% | 2020 Q1 |
| Whale Rock Capital (focused) | 576.9k | 2.19% | $199.4M | trimmed -17.4% | 2025 Q2 |
| Franklin Resources | 530.4k | 2.01% | $183.3M | added +7.1% | 2020 Q1 |
| Ameriprise Financial INC | 467.1k | 1.77% | $161.4M | added +2% | 2020 Q2 |
| Invesco | 443.9k | 1.69% | $153.4M | trimmed -46.6% | 2020 Q3 |
| BNY Mellon | 372.9k | 1.42% | $128.9M | added +5.4% | 2020 Q1 |
| Gilder Gagnon Howe & CO LLC | 326.1k | 1.24% | $112.7M | trimmed -12.2% | 2019 Q4 |
| Wellington Management | 289.4k | 1.10% | $100.0M | trimmed -28.8% | 2023 Q1 |
| AllianceBernstein | 287.1k | 1.09% | $99.2M | trimmed -4.5% | 2020 Q2 |
| Northern Trust | 267.8k | 1.02% | $92.5M | added +24.1% | 2019 Q4 |
| Goldman Sachs | 265.5k | 1.01% | $91.8M | added +6.3% | 2019 Q4 |
| Principal Financial Group INC | 261.9k | 0.99% | $90.5M | trimmed -28% | 2019 Q4 |
| Morgan Stanley | 256.3k | 0.97% | $88.6M | trimmed -35.2% | 2019 Q4 |
| Driehaus Capital Management LLC | 228.0k | 0.86% | $78.8M | trimmed -44.8% | 2024 Q2 |
| American Century Companies INC | 221.2k | 0.84% | $76.4M | trimmed -25.9% | 2025 Q2 |
| Hood River Capital Management LLC | 202.8k | 0.77% | $70.1M | trimmed -24.4% | 2020 Q3 |
| Charles Schwab Investment Management | 196.5k | 0.75% | $67.9M | trimmed -10.4% | 2020 Q1 |
| Artisan Partners | 196.0k | 0.74% | $67.7M | opened | 2026 Q1 |
| BNP Paribas Financial Markets | 195.2k | 0.74% | $67.5M | trimmed -17.3% | 2024 Q4 |
| UBS | 185.6k | 0.70% | $64.1M | added +1.7% | 2020 Q1 |
| Fuller & Thaler Asset Management, INC. | 178.3k | 0.68% | $61.6M | added +5.9% | 2025 Q4 |
| Jane Street | 176.8k | 0.67% | $61.1M | trimmed -38.5% | 2021 Q1 |
| Bank OF America CORP /DE/ | 151.0k | 0.57% | $52.2M | added +53.7% | 2020 Q1 |
| T. Rowe Price Investment Management, INC. | 143.4k | 0.54% | $49.5M | added +2986.9% | 2025 Q3 |
| Brown Advisory INC | 142.9k | 0.54% | $49.4M | trimmed -33.7% | 2023 Q2 |
| Lord, Abbett & CO. LLC | 139.1k | 0.53% | $48.1M | trimmed -1.3% | 2025 Q2 |
| Federated Hermes, INC. | 131.4k | 0.50% | $45.4M | added +5.1% | 2024 Q4 |
| Oberweis Asset Management INC/ | 119.3k | 0.45% | $41.2M | added +12.1% | 2025 Q2 |
| Bamco INC /NY/ | 117.0k | 0.44% | $40.4M | unchanged | 2023 Q1 |
| D. E. Shaw | 116.8k | 0.44% | $40.4M | added +16127.1% | 2025 Q4 |
| FengHe Fund Management Pte. LTD. (focused) | 107.7k | 0.41% | $37.2M | trimmed -16.1% | 2025 Q4 |
| Dimensional Fund Advisors | 107.0k | 0.41% | $37.0M | trimmed -39.5% | 2023 Q2 |
| Voya Investment Management LLC | 106.4k | 0.40% | $36.8M | trimmed -23.8% | 2020 Q3 |
| Summit Partners Public Asset Management, LLC | 105.0k | 0.40% | $36.3M | trimmed -15.3% | 2025 Q4 |
| Raymond James Financial INC | 95.9k | 0.36% | $33.1M | added +22.7% | 2020 Q3 |
| TimesSquare Capital Management, LLC | 91.1k | 0.35% | $31.5M | trimmed -11.9% | 2025 Q2 |
| Styrax Capital, LP (focused) | 90.0k | 0.34% | $31.1M | unchanged | 2025 Q4 |
| Aperture Investors, LLC | 87.8k | 0.33% | $30.3M | added +535.3% | 2025 Q4 |
| Daiwa Securities Group INC. | 84.0k | 0.32% | $29.0M | added +79.4% | 2025 Q3 |
| Arrowstreet Capital | 79.2k | 0.30% | $27.4M | added +865.1% | 2025 Q4 |
| Eventide Asset Management, LLC | 73.7k | 0.28% | $25.5M | trimmed -52.8% | 2024 Q3 |
| Stephens Investment Management Group LLC | 69.9k | 0.27% | $24.1M | opened | 2026 Q1 |
| Tudor Investment | 66.0k | 0.25% | $22.8M | opened | 2026 Q1 |
| Neuberger Berman Group LLC | 65.9k | 0.25% | $22.8M | added +110.9% | 2024 Q4 |
| Emerald Advisers, LLC | 65.8k | 0.25% | $22.7M | trimmed -25.6% | 2024 Q4 |
Largest 50 of 407 shown; the full ranked, searchable register is at boothcheck.com/holders/SITM. 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.