Here is a summary of the key stock additions, sales, initiations and liquidations conducted by the most prominent US hedge funds in the third quarter.

APPALOOSA

Boosted Stakes in HCA, HUN, CE, LCC, TEX in 3Q

Cut Stakes in SPY, BRCM, BAC, HTZ, SNDK in 3Q

Exited Stakes in CMCSA, MSFT, WFT, CHKP, NTAP in 3Q

Took Stakes in JCP, FCX, INGR, CYH, THC in 3Q

BERKSHIRE HATHAWAY

Boosted Stakes in SU, V.N, USB, BK in 3Q

Cut Stakes in COP, DTV, GSK, SNY in 3Q

BP CAPITAL

Boosted Stakes in PXD, WFT, HAL, VLO, APC in 3Q

Exited Stakes in APA, WLL, SU, BCEI, SM in 3Q

Cut Stakes in GDP, TSO, PSX, BAS, YCS in 3Q

Took Stakes in XOM, ATHL, EQT, XON in 3Q

ETON PARK

Cut Stakes in FOXA, DG, DLTR, ELN, EBAY, BIDU in 3Q

Exited Stakes in NLSN, PCLN, ULTA, VC, CHTR in 3Q

Took Stakes in FDO, STZ, BID, EQIX, AUCN, MNK in 3Q

FAIRHOLME CAPITAL

Cut Stakes in JOE, C, WFC, HIG in 3Q

Boosted Stakes in SHLD in 3Q

GATES FOUNDATION

Boosted Stakes in BRK/B, BP in 3Q

Took Stakes in APD in 3Q

GREENLIGHT CAPITAL INC

Boosted Stakes in WPX, OIS, SPR in 3Q

Cut Stakes in AET, AHL, LM, NCR, CI in 3Q

Exited Stakes in OAK, STBZ, CBF in 3Q

Took Stakes in XON, TPX, NVR in 3Q

HIGHFIELDS

Boosted Stakes in MSFT, FDX, VOD, QCOM, Vodafone 3Q

Cut Stakes in FOXA, SLM, UPS, THI, ups, aet in 3Q

Exited Stakes in ILMN, ORCL, JPM, LPS, ORCL TEVA 3Q

Took Stakes in ASH, NWSA, MU, CF, MU, NWSA in 3Q

ICAHN ASSOCIATES

Boosted Stakes in FDML, IEP, CHK, NUAN in 3Q

LONE PINE CAPITAL

Boosted Stakes in MON, QCOM, DG in 3Q

Exited Stakes in ISRG, RL, HTZ, GRA, TMO in 3Q

Took Stakes in BIDU, MA, DVA, P, AMZN in 3Q

Cut Stakes in GOOG, PUN, EBAY, CHTR, HRB in 3Q

OMEGA ADVISORS

Boosted Stakes in SD, C, EXXI, CZR, PMT in 3Q

Cut Stakes in UNE, KMI, ESRX, QCOM, WMB in 3Q

Exited Stakes in OXY, WFC, CROX, ASNA, ORCL in 3Q

Took Stakes in S, FCX, HCA, RLGY, CMCSK in 3Q

PAULSON

Boosted Stakes in VOD, FDO, KOG, MTB, AET in 3Q

Cut Stakes in RLGY, CIE, LIFE, IOC, LEAP in 3Q

Exited Stakes in MJN, ELN, FRP in 3Q

Took Stakes in TWC, S, MNK, FDX, WLL in 3Q

PERSHING SQUARE

Boosted Stake in APD in 3Q

Exited Stake in MATX, JCP in 3Q

Cut Stakes in GGP, PG, CP in 3Q

RELATIONAL

Boosted Stakes in SPW, TKR, HES, PM., TKR, BG in 3Q

Cut Stakes in HPQ, DGX, SPY, MDY in 3Q

Exited Stakes in A, EMN, TEX, IWS in 3Q

Took Stakes in TLM, VSI in 3Q

SAC CAPITAL

Boosted Stakes in YHOO, APD, ISRG, ISO in 3Q

Cut Stakes in CLR, AMZN, SLB, FB, GPS in 3Q

Exited Stakes in PETM, MT, GDX, PF in 3Q

Took Stakes in PNRA, ZNGA, TRN, NOK, PRGO in 3Q

SOROS FUND

Exited Stakes in DAL, UAL, SFLY, ACTG in 3Q

Boosted Stakes in CF, DXJ, PVA, SEMG in 3Q

Cut Stakes in GOOG, HO, AIG, STZ in 3Q

Took Stakes in MSFT, FDX, TEVA, HAL in 3Q

THIRD POINT LLC

Boosted Stakes in BID, CCE, STZ, APC, CF in 3Q

Cut Stakes in YHOO, DIS, TMO, COG, FOXA in 3Q

Exited Stakes in TIF, WCC, WMB in 3Q

Took Stakes in FDX, GOOG, EQT, XON, ATVI in 3Q

TRIAN FUND MANAGEMENT LP

Boosted Stakes in LM in 3Q

Cut Stakes in IR in 3Q

Exited Stakes in STT, BID in 3Q

Source: RanSquawk