Yahoo!

(YHOO)

isn't the only stock that

(ATCHX)

Amerindo Technology's Alberto Vilar has been

selling lately. He's been beefing up on other Internet holdings, while getting further away from his biotech roots.

According to the fund's most recent annual report, Vilar sold shares of integrated circuit software firm

Avant!

,

(AVNT)

, telecom systems developer

Ciena

(CIEN) - Get Report

and biotech firms

Ergo Science

(ERGO)

and

IDEC Pharmaceuticals

(IDPH)

during the second half of last year.

At least, those holdings were in his semiannual report for last June, and they weren't listed as holdings in his annual report for Dec. 31, 1998, filed with the

Securities and Exchange Commission

March 1. Vilar was not available for comment over the course of two business days for this story.

Another onetime holding absent from Vilar's portfolio at the end of 1998 was data analysis firm

Arbor Software

. That company merged with financial management specialist

Hyperion Software

, now known as

Hyperion Solutions

(HYSL)

in August 1998, which wasn't in Vilar's December 1998 portfolio, either.

To replace these companies, Vilar went more heavily into Internet stocks like

broadcast.com

(BCST)

and online auctioneer

eBay

(EBAY) - Get Report

. He also bought

Broadcom

(BRCM)

, which makes broadband semiconductors, and

Inktomi

,

(INKT)

, which develops applications for Internet search engines.

Vilar doubled his stake in processor maker

MMC Networks

(MMCN)

to 160,000 shares and sold off 85,000 shares of beleaguered enterprise software developer

PeopleSoft

(PSFT)

.