BRUSSELS, Dec 16 (Reuters) - The following are mergers under review by the European Commission and a brief guide to the EU merger process:

APPROVALS AND WITHDRAWALS

-- French group Danone (DANO.PA) to acquire U.S. organic foods producer WhiteWave Foods Co (WWAV.N) (approved Dec. 16)

-- Germany's Deutsche Post AG (DPWGn.DE) to acquire UK postal operator UK Mail Group (UKM.L) (approved Dec. 16)

-- Italian utility Enel (ENEI.MI) to acquire Italian fibre-optic company Metroweb which will merge with Enel Open Fiber, a joint venture with Italian state lender Cassa Depositi e Prestiti (CDP) (approved Dec. 15)

-- German financial services company Allianz (ALVG.DE) and Dutch insurance company NN Group (NN.AS) to acquire joint control over German student housing company The FIZZ (approved Dec. 15)

NEW LISTINGS

None

FIRST-STAGE REVIEWS BY DEADLINE

DEC 21

-- Irish technology distribution company Exertis, which is part of DCC PLC (DCC.L) , to acquire UK data-storage company Hammer (notified Nov. 16/deadline Dec. 21)

DEC 22

-- Coca Cola Company (KO.N) to buy 50 percent stake in Lithuanian mineral water producer Neptuno Vandenys from Coca Cola Hellenic Bottling Company (CCH.L) (notified Nov. 17/deadline Dec. 22)

-- Verizon Communications (VZ.N) to acquire U.S. internet company Yahoo (YHOO.O) (notified Nov. 17/deadline Dec. 22)

JAN 4

-- U.S. car sealing and thermal management products Dana (DAN.N) to acquire transmissions and hydraulic and electronic parts maker Brevini Group's fluid power and power transmission units (notified Nov. 22/deadline Jan. 4/simplified)

JAN 5

-- UK engineering company Smiths Group (SMIN.L) to acquire U.S.-based Morpho Detection from French aerospace company Safran (SAF.PA) (notified Nov. 23/deadline Jan. 5)

-- Private equity firms Cinven (CINV.UL) , Permira and Mid Europa to acquire Polish e-commerce business Allegro and Polish price comparison website Ceneo from South African media and e-commerce company Naspers (notified Nov. 23/deadline Jan. 5/simplified)

JAN 6

-- Chinese insurance company Fosun to acquire German fashion house Tom Tailor (notified Nov. 24/deadline Jan. 6/simplified)

JAN 9

-- Venture capital company Rockaway Capital SE, energy company EC Investments and Czech financial services company PPF Group N.V. (PPFGP.UL) to create online shopping joint venture Sully System (notified Nov. 25/deadline Jan. 9/simplified)

-- Czech e-commerce services company Rockaway Capital SE, energy company EC Investments and Czech financial services company PPF Group N.V. to acquire Sully systems, which will act as a holding company (notified Nov. 25/deadline Jan. 9/simplified)

JAN 10

-- French automotive manufacturer Groupe PSA (PEUP.PA) to take control of French second-hand car distributor Groupe Aramis (notified Nov. 28/deadline Jan. 10/simplified)

-- Business consultancy Everis Initiatives, which is a subsidiary of Japanese group NTT Data (9613.T) , and Spanish bank Bankia (BKIA.MC) to jointly acquire Spanish company Nettit Colaborative Payment, which is now solely controlled by Everis (notified Nov. 28/deadline Jan. 10/simplified)

JAN 11

-- U.S. medical devices maker Abbott Laboratories (ABT.N) to acquire U.S. diagnostics company Alere (ALR.N) (notified Nov. 29/deadline Jan. 11)

JAN 13

-- Investment firm HIG Capital to acquire shares in Dutch recycling company Ecore (notified Dec. 1/deadline Jan. 13/simplifed)

-- U.S. conglomerate Koch Industries (KCHIN.UL) to acquire U.S. peer Guardian Industries (notified Dec. 1/deadline Jan. 13/simplified)

JAN 17

-- German automotive parts supplier Rheinmetall Automotive and Chinese automobile radiator company Zhejan Yinlun Machinery to form joint venture JV (notified Dec. 5/deadline Jan. 17/simplified procedure)

-- U.S. investment firm KKR & Co. (KKR.N) to take sole control of Japanese auto parts supplier Calsonic Kansei Corp (7248.T) (notified Dec. 5/deadline Jan. 17/simplified)

JAN 18

-- Private equity firm Permira to acquire online fashion products retailer Schustermann & Borenstein (notified Dec. 6/deadline Jan. 18/simplified)

-- Private equity firm Permira (PERM.UL) to acquire German fashion retailer and exporter Schustermann & Borenstein (notified Dec. 6/deadline Jan. 18/simplified)

JAN 20

-- U.S. investment group KKR (KKR.N) to acquire a majority stake in Swedish bed and mattrass maker Hilding Anders (HIDIN.UL) (notified Dec. 8/deadline Jan. 20/simplified)

-- South Africa's Barloworld Ltd (BAWJ.J) and Germany's BayWa (BYWGnx.DE) to establish BHBW joint venture for agriculture and materials handling operations in southern Africa (notified Dec. 8/deadline Jan. 20/simplified)

-- U.S. investment group KKR (KKR.N) to acquire a majority stake in Swedish bed and mattrass maker Hilding Anders (HIDIN.UL) (notified Dec. 8/deadline Jan. 20/simplified)

-- South Africa's Barloworld Ltd (BAWJ.J) and Germany's BayWa (BYWGnx.DE) to establish BHBW joint venture for agriculture and materials handling operations in southern Africa. (notified Dec. 8/deadline Jan. 20/simplified)

JAN 23

-- France's Schneider Electric (SCHN.PA) and DB Energie to form a joint venture (notified Dec. 9/deadline Jan. 23/simplified)

JAN 25

-- Japanese holding company Sompo Holdings Inc (8630.T) to acquireNew York-listed insurer Endurance Specialty Holdings Ltd (ENH.N) (notified Dec. 13/deadline Jan. 25/simplified)

JAN 26