Meet the Family Q&A With Janus Mercury's Warren Lammert

As tech fund managers go, Warren Lammert's a relative old hand, having steered Janus(JAMRX Quote)Mercury Fund since 1993. In that time the fund has established a name for itself as one of the top large-cap growth offerings, ranking in the top 3% of its category over three- and five-year periods.

The Janus File

Janus' Extraordinary 1999 Powered by Small Group of Favored Stocks

Investors Pour $1 Billion Into Janus Value Fund

Behind Closed Doors Is Janus Turning Bearish?

Janus Makes Big Bet on Telecom Sector

Planned Spinoff Causes Much Grumbling, but Little Fumbling at Janus

Nokia Is Falling, and Janus Feels Its Pain

Janus CIO Steps Down

Janus Closes Doors on $50 Billion Flagship Fund

Janus Funds See Outflows for First Time in Years

Janus Denies Rumors of Dumping Tech Stocks

The Janus Question: To Hold or Sell?

Though it's been around a while, Mercury isn't easy to pin down: Lammert has leeway to scoop up small- and mid-cap names (though that's gotten harder, with $13.6 billion in assets). He can venture overseas as well. At the end of the third quarter, only about 75% of the fund's noncash investments were in the U.S., with the bulk of international holdings, 17%, in Europe. Lammert's not shy about making big bets, either: As of last spring, the most recent data available, he had over 9% of the fund's assets wrapped up in Nokia(NOK Quote). (Nokia remains his top holding.) ...