As an AI language model, I don’t have access to real-time data. However, I can provide you with the names of ten well-known venture capital firms that have been active in recent years. Please note that the level of activity can vary from year to year, and rankings may change. Here are ten prominent venture capital firms that have been active in the past:
1. Sequoia Capital
2. Accel
3. Andreessen Horowitz
4. Bessemer Venture Partners
5. Index Ventures
6. Greylock Partners
7. Kleiner Perkins
8. New Enterprise Associates (NEA)
9. 500 Startups
10. General Catalyst
These firms have a strong track record of funding and supporting startups across various industries. However, it’s essential to research and review the latest data to determine the most active venture capital firms in the current year.