| T. Rowe Price Associates, Inc. | Baltimore | $2,196.45B | 7 |
| T.rowe Price Investment Management, Inc. | Baltimore | $204.18B | — |
| Brown Advisory LLC | Baltimore | $124.31B | 3 |
| Proshare Advisors LLC | Bethesda | $85.3B | — |
| PNC Capital Advisors LLC | Baltimore | $50.88B | — |
| Chevy Chase Trust Company | Bethesda | $44.93B | — |
| Asb Capital Management LLC | Bethesda | $36.68B | — |
| 1919 Investment Counsel, LLC | Baltimore | $26.04B | — |
| Arlington Management Employees, LLC | Bethesda | $18.19B | 5 |
| Durable Capital Partners LP | Bethesda | $17.59B | 3 |
| Ullico Investment Advisors, Inc. | Bethesda | $13.92B | 9 |
| Jmi Management, L.P. | Baltimore | $13.58B | 20 |
| Artemis Real Estate Partners, LLC | Chevy Chase | $11.42B | 30 |
| Realterm Transportation LLC | Annapolis | $10.87B | 13 |
| Brown Advisory Investment Solutions Group LLC | Baltimore | $9.84B | 395 |
| D.f. Dent and Company, Inc. | Baltimore | $7.88B | — |
| Midcap Financial Services Capital Management, LLC | Bethesda | $7.27B | 5 |
| Harbor Investment Advisory, LLC | Lutherville | $6.87B | — |
| T. Rowe Price (canada) Inc. | Baltimore | $6.55B | — |
| Greenspring Advisors, LLC | Towson | $6.46B | — |
| T. Rowe Price Advisory Services, Inc. | Owings Mills | $5.9B | — |
| Profund Advisors LLC | Bethesda | $5.2B | — |
| Asset Strategy Consultants LLC | Hunt Valley | $5.16B | — |
| Pennington Partners & Co., LLC | Bethesda | $5.09B | 10 |
| The Prosperity Consulting Group, LLC | Owings Mills | $5.04B | — |
| Impactassets Capital Partners Pb LLC | Bethesda | $4.95B | 1 |
| G10 LLC | Hunt Valley | $4.91B | 16 |
| Heritage Investors Management Corp | Bethesda | $4.63B | — |
| Verdence Capital Advisors, LLC | Hunt Valley | $4.63B | — |
| Hull Street Energy, LLC | Bethesda | $4.57B | 10 |
| Brown Capital Management, LLC | Baltimore | $4.54B | — |
| Innovation X Advisors, LLC | Rockville | $4.52B | 20 |
| Campbell & Company Investment Adviser LLC | Baltimore | $4.34B | 6 |
| New Century Advisors, LLC | Chevy Chase | $4.31B | — |
| Founders Financial Securities, LLC | Towson | $4.14B | — |
| FCP Fund Manager, L.P. | Chevy Chase | $3.48B | 7 |
| Lasalle Investment Management Securities, LLC | Baltimore | $3.33B | — |
| Xml Financial, LLC | Bethesda | $3.3B | — |
| Potomac Fund Management Inc | Bethesda | $3.28B | — |
| Abrams Bison Investments, L.L.C. | Bethesda | $3.04B | 2 |
| Adams Diversified Equity Fund, Inc. | Baltimore | $3.03B | — |
| Baltimore-Washington Financial Advisors, Inc. | Columbia | $2.99B | — |
| Greenhouse Funds LLLP | Baltimore | $2.93B | 4 |
| Patient Capital Management, LLC | Baltimore | $2.5B | 1 |
| Rock Springs Capital Management LP | Baltimore | $2.43B | 2 |
| Fulton Breakefield Broenniman,llc | Bethesda | $2.39B | — |
| Access Holdings Management Company LLC | Baltimore | $2.27B | 27 |
| Cornerstone Advisory, LLC | Hunt Valley | $2.25B | 1 |
| Enlightenment Capital, LLC | Chevy Chase | $2.12B | 14 |
| Albion River Management LLC | Rockville | $2.06B | 2 |