Drum roll, please.

The most active U.S.-based VC firm in 2011 was New Enterprise Associates. Check out the slideshow below to see how active.

The firm, which is investing from its $2.5 billion 13th fund, put nearly $900 million to work in 2011 and invested more than $8.7 million per company.

The stats are based on data through mid-December from Thomson Reuters (publisher of this blog).

In all, Thomson Reuters reported that firms nationwide invested more than $40 billion this past year. When I crunched the numbers, I found that the top 20 most active firms invested nearly $5.3 billion, or 13% of the total. The top 30 firms invested more than $8 billion, or 20 percent.

I also found it interesting how much money, on average, the firms invested. Early stage investor True Ventures, which cracked the top 10, invested an average of $1.63 million into each company. Similarly, First Round Capital, which also focuses on early stage deals invested $1.34 million on average in companies this year, our data reported.

As you might expect, NEA, Kleiner Perkins and Sequoia Capital, which all invest across stages, each averaged more than $8 million per company.

By the way, Andreessen Horowitz, which ranked as the 32nd most active firm based on our data, had one of the largest averages. It invested more than $10.2 million per company.

Photo by Morgan Lane Photography/Shutterstock.

No. 10 Canaan Partners

# of Deals: 47

Average Invested: $3.79 million

Total Invested: $178 million

Sample Deals: Durata Therapeutics, Kabam, The Open Sky Project, Peer39 Inc., Virsto Software Corp.

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