Friday's Small-Cap Winners & Losers - TheStreet

Updated from 2:52 p.m. EDT

The small-cap sector was sluggish again Friday, under pressure from plummeting names like data-storage-systems maker

Isilon Systems

( ISLN).

Shares lost more than a third of their value after the Seattle-based company pegged third-quarter sales at $25 million to $27.5 million, or at least $3.9 million below the mean analyst forecast, according to Thomson Financial. Its second-quarter non-GAAP loss was in line, but shares still lost $5.37 to $9.54.

Anadys Pharmaceuticals

( ANDS) shares were also pummeled on news the San Diego company, along with partner

Novartis

(NVS) - Get Report

, halted early-phase development of their hepatitis C treatment ANA975. The companies determined that "chronic daily dosing ... is inappropriate for further clinical development" in light of animal-toxicology results. Anadys shares plunged 28.9% to $2.34.

Elsewhere, New York theme-park operator

Six Flags

(SIX) - Get Report

tumbled 16.8% to $3.90 after widening its second-quarter continuing-operations loss by 3 cents year over year to 50 cents a share. Revenue, at $344.8 million, was also below the sole analyst's estimate.

Volcom

( VLCM) slid as well after the Costa Mesa, Calif., apparel maker predicted it would make 53 cents to 55 cents a share in the third quarter -- at least 7 cents under the Street's consensus. Shares gave up $6.30, or 14.2%, to $38.04.

On the flip side,

lululemon athletica

(LULUV:Nasdaq) soared 55.6% after its initial public offering. The athletic-apparel company priced 18.2 million shares at $18 apiece, mostly from selling stockholders. Underwriters have an option for 2.73 million more to cover any overalloments. Shares closed up $10 to $28.

And

Microtune

( TUNE) was riding high on word the chipmaker pulled in a more-than-doubled non-GAAP profit of 7 cents a share in the second quarter. Analysts were looking for 3 cents a share, or flat earnings compared with last year. Shares of the Plano, Texas, company jumped 7.8% to $5.42.

The Russell 2000, however, lost 13.65 points, or 1.7%, to 777.83. The S&P SmallCap 600 was shedding 1.5% at 410.05.