NEW YORK (TheStreet) -- Onshore seismic data services provider TGC Industries (TGE) - Get Report was surging 14.1% to $7.79 in premarket trading Monday as it said it will be acquired by peer Dawson Geophysical (DWSN) - Get Report in a transaction valued at about $157 million, representing about $8 a TGC share. TGC shareholders will receive 0.188 a share of Dawson stock for every share of TGC stock. The combined company will retain the Dawson name and trading symbol.

Telecom giant

AT&T

(T) - Get Report

was rising 4.9% to $29.32 after it said it will purchase

T-Mobile USA

from Germany's

Deutsche Telekom

(DT) - Get Report

in a deal valued at about $39 billion.

>> AT&T to Buy T-Mobile USA in $39B Deal

Shares of Jeweler and specialty retailer

Tiffany

(TIF) - Get Report

were popping 5.4% to $60.40 after reporting fourth-quarter net earnings from continuing operations of $1.41 a share and $1.44 a share excluding items, compared with the consensus estimate of $1.39 a share.

>> Tiffany Net Jumps 29%, Japan Sales to Dip

Electronics company

Sony

(SNE) - Get Report

was rising 3.4% to $32.60 as it began restarting production in Japan after the country was hit by a massive earthquake.

Financial services company

Citigroup

(C) - Get Report

was rising 3.2% to $4.65 in premarket trading Monday as it announced a 1-for-10 reverse common stock split and said it plans to reinstate a quarterly dividend of 1 cents a share in the second quarter.

Oil and natural gas exploration and production company

Anadarko Petroleum

(APC) - Get Report

was rising 2.4% to $79.10 as

Korea National Oil

bought about one-third of the company's resource-rich Maverick Basin assets stake for about $1.55 billion.

Goldman Sachs

(GS) - Get Report

was rising 1.2% to $161.85 after

Bloomberg

reported that conglomerate holding company

Berkshire Hathaway

(BRK.B) - Get Report

raked in about $3.7 billion from its $5 billion investment in the financial services company.

>>Search for Highest Dividends by Rate or Yield

-- Written by Andrea Tse in New York.

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