List of institutional investors who are active in the last 9 months.
| # | Name | Latest Filing Quarter | Latest Holding Count | Latest AUM |
| 6551 | Second Half Financial Partners LLC | 2025Q1 | 79 | $200.34M |
| 6552 | Second Line Capital LLC | 2025Q1 | 142 | $383.59M |
| 6553 | Section 32 GP 1 LLC | 2025Q1 | 1 | $24.83K |
| 6554 | SECTOR GAMMA AS | 2025Q1 | 33 | $312.19M |
| 6555 | SECTORAL ASSET MANAGEMENT INC | 2025Q1 | 84 | $128.48M |
| 6556 | Secure Asset Management LLC | 2025Q1 | 293 | $482.63M |
| 6557 | SECURED RETIREMENT ADVISORS LLC | 2025Q1 | 113 | $147.24M |
| 6558 | SECURIAN ASSET MANAGEMENT INC | 2025Q1 | 928 | $3.29B |
| 6559 | SECURITY BENEFIT LIFE INSURANCE CO | 2025Q1 | 10 | $256.58M |
| 6560 | Security Financial Services INC. | 2025Q1 | 158 | $482.49M |
| 6561 | Security National Bank | 2025Q1 | 307 | $516.39M |
| 6562 | SECURITY NATIONAL BANK OF SIOUX CITY IOWA | 2025Q1 | 88 | $137.62M |
| 6563 | SECURITY NATIONAL BANK OF SO DAK | 2025Q1 | 112 | $176.74M |
| 6564 | Seed Wealth Management Inc. | 2025Q1 | 143 | $118.08M |
| 6565 | SEEDS INVESTOR LLC | 2025Q1 | 237 | $320.25M |
| 6566 | Seek First Inc. | 2025Q1 | 49 | $107.64M |
| 6567 | Seelaus Asset Management LLC | 2025Q1 | 165 | $102.64M |
| 6568 | SEGALL BRYANT & HAMILL LLC | 2025Q1 | 573 | $6.53B |
| 6569 | Segment Wealth Management LLC | 2025Q1 | 277 | $1.47B |
| 6570 | SEGRA CAPITAL MANAGEMENT LLC | 2025Q1 | 9 | $204.06M |
| 6571 | SEI INVESTMENTS CO | 2025Q1 | 2669 | $76.08B |
| 6572 | Seilern Investment Management Ltd | 2025Q1 | 23 | $1.53B |
| 6573 | SEIZERT CAPITAL PARTNERS LLC | 2025Q1 | 154 | $2.18B |
| 6574 | SELDON CAPITAL LP | 2025Q1 | 55 | $157.37M |
| 6575 | Select Asset Management & Trust | 2025Q1 | 70 | $249.18M |
| 6576 | Select Equity Group L.P. | 2025Q1 | 143 | $22.4B |
| 6577 | Selective Wealth Management Inc. | 2025Q1 | 97 | $226.45M |
| 6578 | Selkirk Management LLC | 2025Q1 | 14 | $260.55M |
| 6579 | Sellaronda Global Management LP | 2025Q1 | 9 | $99.1M |
| 6580 | Sellwood Investment Partners LLC | 2025Q1 | 34 | $175.37M |
| 6581 | Selway Asset Management | 2025Q1 | 75 | $242.44M |
| 6582 | Semanteon Capital Management LP | 2025Q1 | 235 | $184.12M |
| 6583 | Semmax Financial Advisors Inc. | 2025Q1 | 417 | $350.35M |
| 6584 | SEMPER AUGUSTUS INVESTMENTS GROUP LLC | 2025Q1 | 36 | $620.32M |
| 6585 | Semus Wealth Partners LLC | 2025Q1 | 112 | $142.99M |
| 6586 | Senator Investment Group LP | 2025Q1 | 48 | $1.82B |
| 6587 | Sender Co & Partners Inc. | 2025Q1 | 62 | $134.64M |
| 6588 | Sendero Wealth Management LLC | 2025Q1 | 186 | $720.55M |
| 6589 | Seneca House Advisors | 2025Q1 | 84 | $233.97M |
| 6590 | Seneschal Advisors LLC | 2025Q1 | 32 | $110.64M |
| 6591 | Sensible Financial Planning & Management LLC. | 2025Q1 | 27 | $400.21M |
| 6592 | Sensible Money LLC | 2025Q1 | 79 | $231.94M |
| 6593 | SENTINEL PENSION ADVISORS LLC | 2025Q1 | 104 | $435.34M |
| 6594 | SENTINEL TRUST CO LBA | 2025Q1 | 134 | $847.74M |
| 6595 | Sentinus LLC | 2025Q1 | 186 | $343.82M |
| 6596 | SENTRY INVESTMENT MANAGEMENT LLC | 2025Q1 | 480 | $147.49M |
| 6597 | Sentry LLC | 2025Q1 | 131 | $513.57M |
| 6598 | Senvest Management, LLC | 2025Q1 | 42 | $2.39B |
| 6599 | Sepio Capital LP | 2025Q1 | 284 | $1.26B |
| 6600 | Sequent Asset Management LLC | 2025Q1 | 83 | $179.54M |