Below is an overview of some of the major value investors and hedge funds based on their 2013 fourth quarter 13F SEC Filings. These filings mostly cover equities and ETFs, so foreign stocks, bonds, and other securities don’t appear. Since the 13Fs cover Q42013, some of these positions may have changed since the beginning of the year.

NOTE: AUM refers to 13F data not total AUM, which in many cases is much larger.

13F Seth Klarman – Baupost Group Llc

Assets under Management (AUM): $3.5 billion

Baupost opened new positions in Fidelity National Financial Inc (NYSE:FNF), Kindred Biosciences Inc (NASDAQ:KIN), and Alon USA Partners LP (NYSE:ALDW) last quarter. It also nearly tripled its position in PBF Energy Inc (NYSE:PBF) and increased Idenix Pharmaceuticals Inc (NASDAQ:IDIX) and Syneron Medical Ltd. (NASDAQ:ELOS) by more than 40% each. It exited its positions in Ituran Location and Control Ltd. (US) (NASDAQ:ITRN), Oracle Corporation (NYSE:ORCL), Micron Technology, Inc. (NASDAQ:MU), and Central Pacific Financial Corp. (NYSE:CPF).

All charts via SpecSituations

baupost group 13F

Warren Buffett – Berkshire Hathaway Inc

AUM: $105 billion

Berkshire Hathaway opened positions in Goldman Sachs Group Inc (NYSE:GS) and Liberty Global Plc. It more than doubled its position in USG Corporation (NYSE:USG) and increased its position in General Electric Company (NYSE:GE) by 2009%, though it is still one of the groups’ smaller positions. Berkshire Hathaway Inc. (NYSE:BRK.A) (NYSE:BRK.B) closed its positions in DISH Network Corp (NASDAQ:DISH) and GlaxoSmithKline plc (NYSE:GSK) (LON:GSK), while its position in Washington Post Co was changed to Graham Holdings Co (NYSE:GHC) due to a corporate name change.

Berkshire Hathaway 13F

Carl Icahn – Icahn

AUM: $30 billion

Icahn opened a new position in Hologic, Inc. (NASDAQ:HOLX), and increased its position in Talisman Energy Inc. (NYSE:TLM) by 1093%, with the next largest percentage increase being Apple stock up 43.7%. Icahn closed its position in Take-Two Interactive Software, Inc. (NASDAQ:TTWO).

carl icahn 13F

Paul Singer – Elliott Management Corp

AUM: $4.4 billion

Elliott Management opened positions in Juniper Networks, Inc. (NYSE:JNPR), Companhia de Saneamento Basico (NYSE:SBS), Time Warner Inc (NYSE:TWX), Spdr Series Trust (NYSEARCA:IPE), General Motors Company (NYSE:GM), Anadarko Petroleum Corporation (NYSE:APC), and CorMedix Inc. (NYSEMKT:CRMD). It increased its holdings of iShares TR ETF 219% and Riverbed Technology, Inc. (NASDAQ:RVBD) by 181%.

It closed positions in Autodesk, Inc. (NASDAQ:ADSK), Advance Auto Parts, Inc. (NYSE:AAP), Barrick Gold Corporation (NYSE:ABX), Dell Inc. (NASDAQ:DELL), Elan Corporation, plc (NYSE:ELN), Linear Technology Corporation (NASDAQ:LLTC), Solazyme Inc (NASDAQ:SZYM), Newmont Mining Corp (NYSE:NEM), NVIDIA Corporation (NASDAQ:NVDA), Melco Crown Entertainment Ltd (NASDAQ:MPEL), Verisign, Inc. (NASDAQ:VRSN), SPDR S&P 500 ETF Trust (NYSEARCA:SPY), and Market Vectors ETF.

elliot management 4q13

David Einhorn – Greenlight Capital Inc

AUM: $7.3 billion

Greenlight Capital opened positions in Anadarko Petroleum Corporation (NYSE:APC), BP plc (NYSE:BP), Chico’s FAS, Inc. (NYSE:CHS), EMC Corp Mass, McDermott International (NYSE:MDR), Micron Technology, Inc. (NASDAQ:MU), Penn National Gaming, Inc (NASDAQ:PENN), Take-Two Interactive Software, Inc. (NASDAQ:TTWO), and Sunedison Inc (NYSE:SUNE). Greenlight also nearly doubled its position in Tempur Sealy International Inc (NYSE:TPX) and closed its position in NVR, Inc. (NYSE:NVR).

greenlight capital 4q13

Jim Chanos – Kynikos Associates Lp

AUM: $320 million

Kynikos Associates opened new positions in Cognizant Technology Solutions Corp (NASDAQ:CTSH), FireEye Inc (NASDAQ:FEYE), Huntington Ingalls Industries Inc (NYSE:HII), Morgan Stanley (NYSE:MS), Noble Energy, Inc. (NYSE:NBL), Tata Motors Limited (NYSE:TTM), and iShares ETF. It increased its holdings of SPDR S&P MidCap 400 ETF (NYSEARCA:MDY) by 165% and SPDR S&P 500 ETF Trust (NYSEARCA:SPY) by 122%. Kynikos closed positions in AGCO Corporation (NYSE:AGCO), KKR & Co. L.P. (NYSE:KKR), McDonald’s Corporation (NYSE:MCD), Take-Two Interactive Software, Inc. (NASDAQ:TTWO), United States Natural Gas Fund, LP (NYSEARCA:UNG), and Yelp Inc (NYSE:YELP).

kynikos 4q13

Bill Ackman – Pershing Square Capital Management Lp

AUM: $8.2 billion

Pershing Square Capital Management didn’t initiate or close any positions last quarter, reducing its holdings of Canadian Pacific Railway Limited (NYSE:CP) slightly, and increasing everything else.

Pershing square 4q13

Dan Loeb – Third Point Llc

AUM: $5.8 billion

Third Point opened positions in Abbott Laboratories (NYSE:ABT), Actavis Plc, Apple Inc. (NASDAQ:AAPL), Baidu Inc (NASDAQ:BIDU), BlackBerry Ltd (NASDAQ:BBRY) (TSE:BB), Cheniere Energy Partners LP (NYSEMKT:CQP), Cole Real Estate Investments Inc (NYSE:COLE), Crown Holdings, Inc.(NYSE:CCK), The Dow Chemical Company (NYSE:DOW), Fidelity National Financial Inc (NYSE:FNF), General Motors Company (NYSE:GM), Hertz Global Holdings, Inc. (NYSE:HTZ), Nielsen Hldg NV (NYSE:NLSN), NXP Semiconductors NV (NASDAQ:NXPI), Northstar Realty Finance Corp. (NYSE:NRF), T-Mobile Us Inc (NYSE:PCS) (NYSE:TMUS), and Williams Companies, Inc. (NYSE:WMB).

It closed positions in Allergan, Inc. (NYSE:AGN), CF Industries Holdings, Inc. (NYSE:CF), Elan Corporation, plc (NYSE:ELN), Liberty Interactive Corp, Thermo Fisher Scientific Inc. (NYSE:TMO), Tibco Software Inc. (NASDAQ:TIBX), Twenty-First Century Fox Inc (NASDAQ:FOXA), and The Walt Disney Company (NYSE:DIS).

third point 4q13

Jeffrey Ubben – ValueAct Holdings Lp

AUM: $12 billion

ValueAct opened a new position in Dresser-Rand Group Inc. (NYSE:DRC) and increased its holdings of Allison Transmission Holdings Inc (NYSE:ALSN) by 330%. It exited its position in CF Industries Holdings, Inc. (NYSE:CF), Mosaic Co (NYSE:MOS), and Valero Energy Corporation (NYSE:VLO).

valueact holdings 4q13

Below are a few other notable changes via Bloomberg:

Paulson & Co takes stakes in Extended Stay America Inc (NYSE:STAY), Houghton Mifflin Harcourt Co. (NASDAQ:HMHC), Anglo American plc (LON:AAL), Compuware Corporation (NASDAQ:CPWR), Caesars Acquisition Company (NASDAQ:CACQ); boosts stakes in Vodafone Group Plc (NASDAQ:VOD), Whiting Petroleum Corp (NYSE:WLL), Time Warner Cable Inc (NYSE:TWC), Sprint Corporation (NYSE:S), Oasis Petroleum Inc. (NYSE:OAS); cuts stakes in AMC Networks Inc (NASDAQ:AMCX), Family Dollar Stores, Inc. (NYSE:FDO), Cooper Tire & Rubber Co (NYSE:CTB), M&T Bank Corporation (NYSE:MTB), Pioneer Natural Resources (NYSE:PXD); exits stakes in W.P. Carey Inc. REIT (NYSE:WPC), Hillshire Brands Co (NYSE:HSH), JAZZ, FedEx Corporation (NYSE:FDX), Citigroup Inc (NYSE:C)

David Tepper’s Appaloosa Management takes stakes in AAL, HAL, EMN, BIDU, CBS; cuts stakes in GT, QCOM, MET, DAL, UAL; exits stakes in DIA, HTZ, BAC, SNDK, LNC

Bruce Berkowitz’s Fairholme Capital takes stakes in FNMA, FMCC; boosts stakes in BAC, CHK; cuts stakes in AIG, JOE, LUK, BRK/B

Kyle Bass’s Hayman Capital boosts stakes in VOD, NRG, RNWK; exits stakes in TPX, JCP, MSFT

Steve Mandel’s Lone Pine takes stakes in MSFT, ICE, MHFI, ENDP; boosts stakes in MA, CCI, DVA, LBTYA, DG, CCI cuts stakes in MON, FB, KORS, MJN, CHTR; exits stakes in EBAY, EQIX, KMI, GOOG, OCN

George Soros’s Soros Fund Management takes stakes in ESNT, JPM, LUK, C, ABX; boosts stakes in TEVA, GM, HAL, AAPL, DISH; cuts stakes in JCP MSFT, NTAP, HLF, BRCD, CF

Lee Cooperman’s Omega Advisors takes stake in GM, GLPI, SUNE, TMUS, ICE,CAM; boosts stakes in S, DISH, CZR, SD, HCA; cuts stakes in MET, ESRX, ATLS, BSX, APL; exits stakes in PLCM, ATML, VR, PENN, OCN