NEW YORK (TheStreet) -- Tyson Foods (TSN) - Get Report reported second-quarter profit of 42 cents a share, a penny shy of expecations. Revenue rose 16% to $8 billion from $6.92 billion a year ago, beating expectations. Shares of Tyson were up 0.2% to $18.93 in premarket trading Monday.

Car rental company

Hertz

(HTZ) - Get Report

was rising 1.7% to $17.13 afteroffering a new

proposal to buy Dollar Thrifty( DTG)

for about $2.1 billion. Shares of Dollar Thrifty were surging 8.7% to $75.75 in premarket trading Monday.

Drug company

Alkermes

(ALKS) - Get Report

reached a deal to acquire Elan Drug Technologies from

Elan

(ELN)

, the Irish drugmaker,

for $960 million in cash and stock.

Elan shares were rising 3.4% to $8.14.

Shares of

HSBC

(HBC)

were falling 1.1% to $52.47 as it and

Barclays

(BCS) - Get Report

got ready to reserve more than $2 billion combined for customers for wrongfully sold insurance -- forfeiting in a legal battle on the matter. Separately, HSBC said first-quarter earnings rose 58% to $4.15 billion from $2.63 billion a year earlier

as loan impairment charges fell and taxes decreased.

Warren Buffett's

Berkshire Hathaway

(BRK.B) - Get Report

reported

sharply lower first-quarter earnings

from a year earlier, as its catastrophe insurance underwriting business suffered big losses early in 2011 because of the earthquake and tsunami in Japan.

Consumer giant

Unilever

(UL) - Get Report

has received approval from the U.S. Department of Justice to complete its proposed acquisition of

Alberto Culver

(ACV) - Get Report

.

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