Traditionally, December is a strong month for M&A, as private equity firms and strategic buyers race to close deals by the end of the year. In keeping with that phenomenon, December delivered 156 completed middle-market transactions, up slightly from November’s tally of 134, according to Thomson Reuters. Despite the increase, however, deal volume was significantly lower than the previous December, which generated 209 completed transactions.

In another sign of weakness in the middle market, December’s composite score on the Mid-Market M&A Conditions Index (MACI) indicated a contraction in dealmaking for the first time since Mergers & Acquisitions began our monthly surveys in the fall of 2013. Survey respondents cited a wide range of issues dampening deal flow, including rising interest rates, slowing economic growth, uncertainty about the upcoming elections and fears about terrorism throughout the world.

The biggest mid-market transaction to close in December was the purchase by Sensata Technologies Holding NV (NYSE: ST) of Custom Sensors & Technologies Inc. for $1 billion. “This acquisition further extends our sensing content beyond automotive markets and builds scale in pressure sensing," said Sensata CEO Martha Sullivan. The acquisition of Custom follows Sensata’s $1 billion purchase of Shrader International, which makes tire-pressure monitors, from PE firm Madison Dearborn Partners LLC, which closed in October 2014.

Below is a list of selected middle-market M&A deals completed in October 2014.

Editor’s Note: To measure activity in the middle market, Mergers & Acquisitions looks at transactions that fulfill several requirements: Deals must have a value of roughly $1 billion or less; they must be completed (not just announced) within the timeframe designated; and they must include at least one U.S. company in the role of buyer and/or seller. Excluded from our charts are: recapitalizations; self-tenders; exchange offers; repurchases; stake purchases; and transactions with undisclosed values, buyers or sellers. Our data provider is Thomson Reuters, which updates its databases continuously. We use the data available at press time.

DateAcquirerTargetTarget IndustryValue ($mil)
12/01/15Sensata Tech Hldg NVCustom Sensors & Tech-SensingElectronic and Electrical Equipment1,000.0
12/21/15Investor GroupWestfield Connecticut PostReal Estate; Mortgage Bankers and Brokers955.5
12/30/15EnerVest LtdRange Resources Corp-Nora AstsOil and Gas; Petroleum Refining876.0
12/09/15Catterton Partners CorpSteiner Leisure LtdPersonal Services834.0
12/21/15Investor GroupWfield Mainfield,CAReal Estate; Mortgage Bankers and Brokers813.9
12/07/15Integrated Silicon SolutionIntegrated Silicon SolutionElectronic and Electrical Equipment813.4
12/21/15KKR & Co LPGestamp Asetym Solar SLElectric, Gas, and Water Distribution800.0
12/08/15Siris Capital Group LLCPremiere Global Services IncBusiness Services655.1
12/11/15Intercontinental Exchange IncTrayport LtdPrepackaged Software646.2
12/01/15Capital One Financial CorpGen Elec Co-US healthcare FinCredit Institutions595.0
12/31/15Blucora IncHDV Holdings IncInvestment & Commodity Firms,Dealers,Exchanges580.0
12/18/15TierPoint LLCWindstream Hldg Inc-Data BusTelecommunications575.0
12/17/15Carlyle Power PartnersRhode Island State Energy CentElectric, Gas, and Water Distribution490.0
12/28/15IHS IncCARPROOF CorpBusiness Services470.0
12/18/15New Flyer Industries IncMotor Coach Industries IntlTransportation Equipment455.0
12/01/15Korn/Ferry InternationalHG (Luxembourg) SARLBusiness Services454.2
12/22/15Cisco Systems IncLancope IncPrepackaged Software452.5
12/09/15NeuStar IncMarketShare Partners LLCBusiness Services450.0
12/21/15Ball CorpLatapack Ball Embalagens LtdaMetal and Metal Products417.4
12/08/15Investcorp Bank BSCOffice & Industrial PptyReal Estate; Mortgage Bankers and Brokers400.0
12/10/15Acuity Brands IncJuno Lighting LLCElectronic and Electrical Equipment385.0
12/17/15Google Incbebop Technologies IncPrepackaged Software380.2
12/04/15Sequential Brands Group IncMartha Stewart LivingPrinting, Publishing, and Allied Services360.9
12/01/15Stock Bldg Supply Hldg IncBuilding Materials HoldingConstruction Firms348.5
12/21/15Meggitt PLCEDAC Tech Corp-Composites DivAerospace and Aircraft340.0
12/22/15Seneca Coal Resources LLCCliffs Natural Resources-NorthMining318.0
12/04/15Integrated Device Tech IncZentrum MikroelektronikElectronic and Electrical Equipment307.0
12/08/15DW Crossland Owner LLCExtended Stay America-Hotel PoHotels and Casinos285.0
12/30/15NeoGenomics IncClarient IncHealth Services275.2
12/09/15IDI IncFluent IncPrepackaged Software255.0
12/01/15Genesis Healthcare IncRevera Inc-Skilled Nursing(24)Health Services240.0
12/29/15Fossil Group IncMisfit IncMeasuring, Medical, Photo Equipment; Clocks236.0
12/18/15New Mountain Capital LLCEquian LLCPrepackaged Software225.0
12/21/15NeuStar IncTNS Inc-Caller AuthenticationBusiness Services220.0
12/10/15Glanbia PLCthinkThin LLCFood and Kindred Products217.0
12/01/15Valley National Bancorp,NJCNLBancshares IncCommercial Banks, Bank Holding Companies207.0
12/23/15Cambridge Holdco CorpAbility Computers & SoftwarePrepackaged Software189.0
12/01/15Perion Network LtdUndertone Networks IncAdvertising Services180.0
12/18/15Kroger CoRoundy's IncRetail Trade-Food Stores177.8
12/21/15Ingram Micro IncDOCdata Nederland ,DOCdata IntBusiness Services176.0
12/16/15AMC Entertainment Holdings IncStarplex CinemasMotion Picture Production and Distribution172.0
12/04/15Investor GroupColony Square,Atlanta,GeorgiaReal Estate; Mortgage Bankers and Brokers170.0
12/29/15All Web Leads IncInsuranceQuotes.comInsurance165.0
12/18/15Blackstone Group LPSouthern Cross West TowerReal Estate; Mortgage Bankers and Brokers159.9
12/23/15Hawkins IncStauber Ingredients IncDrugs157.0
12/16/15John Wood Group PLCThe Infinity GroupConstruction Firms150.0
12/31/15ORLEN Upstream Sp zooFX Energy IncOil and Gas; Petroleum Refining146.1
12/23/15FortBay LLCMtain View's Village Lake AparReal Estate; Mortgage Bankers and Brokers145.0
12/07/15Community Bank System IncOneida Financial CorpSavings and Loans, Mutual Savings Banks142.3
12/10/15News + Media Capital Group LLDB Nevada Holdings IncPrinting, Publishing, and Allied Services140.0
12/01/15TRC Cos IncWillbros US Hldg-ProfessionalConstruction Firms130.0
12/01/15Brooks Automation IncBioStorage Technologies IncTransportation and Shipping (except air)127.0
12/10/15Apollo Education Group IncCareer Partner GmbHEducational Services121.2
12/22/15Warburg Pincus LLCITG Investment-Energy ResearchBusiness Services120.5
12/15/15Honeywell International IncSigma-Aldrich -Res Chem BusBusiness Services119.0
12/01/15Kimco Realty CorpChristown SpectrumReal Estate; Mortgage Bankers and Brokers115.3
12/18/15New York Life Insurance CoMainstreet Capital-Water RidgeReal Estate; Mortgage Bankers and Brokers115.0
12/17/15Waterton Precious Metals FundBarrick Gold Corp-SpringMining110.0
12/08/15Cerberus Capital Management LPPaxVax IncDrugs105.0
12/30/15EVO Payments International LLCUniversalpay Entidad de PagoBusiness Services103.1
12/01/15Heartland Financial USA IncPremier Valley Bank,Fresno,CACommercial Banks, Bank Holding Companies97.3
12/30/15Riverside CoEuromed SADrugs86.7
12/07/15D Cubed Group LLCKysor Panel Systems IncMachinery85.0
12/22/15Preferred ApartmentLenox Village MultifamilyReal Estate; Mortgage Bankers and Brokers77.6
12/31/15DuPontDyadic Intl Inc-Enzyme & TechDrugs75.0
12/23/15Pandora Media IncRdio Inc-key assetsPrepackaged Software75.0
12/01/15Madison Industries IncKennametal Inc-Non-core BusesMachinery70.0
12/14/15Enviva Partners LPEnviva Pellets Southampton LLCWood Products, Furniture, and Fixtures65.5
12/21/15Cantabio Pharmaceuticals IncGardedam Therapeutics IncDrugs64.6
12/21/15Ashford Hospitality Prime IncRitz-Carlton,St ThomasHotels and Casinos64.0
12/01/15Central Garden & Pet CoNatl Consumers Outdoors-pet beWholesale Trade-Nondurable Goods61.0
12/09/15M/A-COM Technology HldgFiBest LtdCommunications Equipment60.0
12/21/15Olshan PropertiesHilton Orrington,EvanstonHotels and Casinos60.0
12/11/15Direct Energy Business LLCPanoramic Power LtdPrepackaged Software60.0
12/17/15ALPHAEON CorpLensAR IncMeasuring, Medical, Photo Equipment; Clocks59.0
12/15/15Albany Molecular Research IncWhitehouse Analytical Labs LLCHealth Services56.0
12/17/15CooperSurgical IncResearch Instruments LtdMeasuring, Medical, Photo Equipment; Clocks51.0
12/22/15Publicis Touchpoint SolutionsPDI Inc-Coml Svcs BusBusiness Services47.6
12/22/15Avcorp Industries IncHITCO Carbon Composites-DivElectronic and Electrical Equipment47.0
12/15/15Suburban Propane Partners LPPropane USAElectric, Gas, and Water Distribution45.0
12/23/15Agenus IncPhosImmune IncDrugs44.9
12/09/15TransUnion LLCTrustev LtdBusiness Services44.0
12/07/15GoldOller RE Invests LLCBonita Fountains,Orlando,FLReal Estate; Mortgage Bankers and Brokers42.8
12/18/15Cubic CorpTeraLogics LLCBusiness Services39.0
12/14/15M/A-COM Technology HldgAeroflex Hldg Corp-Diodes BusElectronic and Electrical Equipment38.0
12/31/15River Financial CorpKeystone Bancshares IncCommercial Banks, Bank Holding Companies36.7
12/07/15InvenTrust Properties CorpPrice Plaza,Katy,TexasReal Estate; Mortgage Bankers and Brokers35.8
12/07/15InvenTrust Properties CorpRio Pinar Plaza,FloridaReal Estate; Mortgage Bankers and Brokers34.0
12/21/15Velsor Properties LLCNewington Business Park CenterReal Estate; Mortgage Bankers and Brokers32.5
12/08/15Fusion Telecommun Intl IncFidelity Voice & Data CoPrepackaged Software30.0
12/30/15Midatech Pharma PLCGalena Biopharma Inc-ZuplenzDrugs29.8
12/07/15Midatech Pharma PLCDARA Biosciences IncDrugs29.7
12/07/15First Capital Inc,Corydon,INPeoples Bancorp Inc Of BullittCommercial Banks, Bank Holding Companies29.5
12/07/15First Capital Inc,Corydon,INPeoples Bank of Bullitt CountyInvestment & Commodity Firms,Dealers,Exchanges29.5
12/22/15Momentum Telecom IncAlteva IncTelecommunications28.2
12/22/15Flight Centre Travel Group LtdStudentUniverse LLCTransportation and Shipping (except air)28.0
12/01/15ABF Logistics IncBear Transp Svcs LPTransportation and Shipping (except air)26.0
12/04/15ESSA Bancorp IncEagle National Bancorp IncCommercial Banks, Bank Holding Companies24.7
12/18/15Aggero GroupShops of Grand AvenueReal Estate; Mortgage Bankers and Brokers24.5
12/31/15California Bank of CommercePan Pacific Bank,Fremont,CACommercial Banks, Bank Holding Companies24.3
12/09/15Strat Aero plcAero KineticsAerospace and Aircraft24.0
12/28/15Steel Partners Holdings LPCoSine Communications IncPaper and Allied Products23.3
12/11/15Citizens Finl Svcs IncFirst Natl Bk,FredericksburgCommercial Banks, Bank Holding Companies23.2
12/01/15Achieva Credit UnionCalusa Bank,Venice,FloridaCommercial Banks, Bank Holding Companies23.2
12/01/15Fastprint Hong Kong LtdXcerra Corp-SemiconductorElectronic and Electrical Equipment23.0
12/21/15Edgewater Technology IncM2 Dynamics IncBusiness Services22.7
12/29/15Maxus Realty Trust IncVillaggio,Bossier,LAReal Estate; Mortgage Bankers and Brokers22.1
12/09/15PolyOne CorpMagenta Master Fibres SrlChemicals and Allied Products22.0
12/04/15Merchants Bancshares Inc,VTNuvo Bank & Trust CoCommercial Banks, Bank Holding Companies21.8
12/04/15Slate Office REITNorth Branch Marketplace,MNReal Estate; Mortgage Bankers and Brokers20.9
12/08/15Enghouse Systems LtdCTI Group(Holdings)IncPrepackaged Software20.5
12/10/15Books-A-Million Inc SPVBooks-A-Million IncMiscellaneous Retail Trade20.5
12/02/15Fondo de Inversion CapitalSignature Exchange IncInvestment & Commodity Firms,Dealers,Exchanges20.4
12/24/15HC2 Holdings IncUnited Teacher Assoc Ins Co,Insurance20.0
12/01/15Egyptian Amer Entrp FundSarwa CapitalInvestment & Commodity Firms,Dealers,Exchanges20.0
12/23/15Clean Power Holdings LLCAG Power Jerome,AG Power DCDOil and Gas; Petroleum Refining19.9
12/18/15United Medical Systems IncUSMD Hldg Inc-Lithotripsy DivHealth Services19.8
12/08/15Greenbacker Renewable EnergyFairfield Wind LLC-FairfieldElectric, Gas, and Water Distribution19.0
12/29/15Investor GroupLifeSize Communications IncCommunications Equipment17.5
12/04/15Argan IncThe Roberts CoConstruction Firms17.5
12/22/15Broadtree Homes IncreBOUND Residential LLC-PortReal Estate; Mortgage Bankers and Brokers17.1
12/01/15Nevada Gold & Casinos IncClub Fortune CasinoAmusement and Recreation Services16.8
12/22/15Pennsylvania American Water CoFairview Township-WastewaterElectric, Gas, and Water Distribution16.8
12/17/15CSW Industrials IncAC Leak FreezeMachinery16.8
12/23/15Kaplan IncSmartPros LtdEducational Services16.4
12/11/15Abzena PLCThe Chemistry Research Sol LLCBusiness Services14.7
12/17/15Investor GroupStolen Spirits NZ LtdFood and Kindred Products14.0
12/01/15PCM IncSysax Inc-Cert B2B AstsRetail Trade-Home Furnishings14.0
12/18/15Kunene Resources LtdDepartment 13 LLCPrepackaged Software12.4
12/30/15Transcat IncSpectrum Technologies IncBusiness Services11.8
12/24/15Hydro International PLCM2 Renewables IncElectric, Gas, and Water Distribution11.0
12/01/15Q2 Holdings IncSocial MoneyInvestment & Commodity Firms,Dealers,Exchanges10.6
12/17/15NRL EnergyNatl Reference Lab for BreastHealth Services10.1
12/28/15Espec CorpQualmark CorpMeasuring, Medical, Photo Equipment; Clocks9.8
12/04/15Baylake CorpNEW Bancshares Inc,WisconsinCommercial Banks, Bank Holding Companies9.7
12/14/15Suncrest Bk,Visalia,CaliforniaSutter Cmnty Bk,Yuba,CACommercial Banks, Bank Holding Companies9.4
12/08/15Phifer IncWire Co Holdings IncMetal and Metal Products8.8
12/15/15Excelsior Mining CorpNord Resources Corp-AssetsMining8.4
12/07/15Sucampo Pharmaceuticals IncR-Tech Ueno LtdDrugs7.8
12/04/15Compactor Rentals of AmericaISA-Waste Services SegmentSanitary Services7.5
12/15/15Cemtrex IncAdvanced Industrial Svcs IncConstruction Firms7.4
12/23/15Oak Valley BancorpMother Lode Bank,Sonora,CACommercial Banks, Bank Holding Companies7.3
12/04/15Progenics Pharmaceuticals IncEXINI Diagnostics ABPrepackaged Software7.1
12/04/15Old Line Bancshares IncRegal Bancorp IncCommercial Banks, Bank Holding Companies5.8
12/17/15Blue Sphere CorpAgricerere S.r.l.Electric, Gas, and Water Distribution5.7
12/08/15Investor GroupPortfolios Of Loans(2)Real Estate; Mortgage Bankers and Brokers4.9
12/28/15Sack Lunch Productions IncSlide the City LLCAmusement and Recreation Services4.2
12/02/15National Waste Management HldgGateway Rolloff Services LPSanitary Services3.5
12/22/15Opto Circuits(India)LtdCriticare Systems IncMeasuring, Medical, Photo Equipment; Clocks3.2
12/18/15GSI Group IncSkyeTek IncPrepackaged Software2.6
12/04/15Perk.com IncCorona Labs IncPrepackaged Software2.3
12/14/15Kentucky Frontier Gas LLCPublic Gas Co Inc-KentuckyElectric, Gas, and Water Distribution1.9
12/02/15Powersecure International IncESCO Energy Services CoConstruction Firms1.8
12/09/15Graphene 3D LabGraphene Laboratories IncElectronic and Electrical Equipment1.7
12/29/15PositiveID CorpE-N-G Mobile Systems IncTransportation Equipment1.0
12/02/15Gilla IncThe Mad Alchemist LLCWholesale Trade-Nondurable Goods0.5
12/01/15Symmetry Surgical IncInsightra Medical Inc-assetsWholesale Trade-Durable Goods0.4
12/01/15ADSTEC CorpTransgenomic Inc-Genetic UnitDrugs0.3
12/15/15Whitebox Advisors LLCAdanac Molybdenum CorpMining0.3
12/09/15Grocery Outlet IncFresh & Easy Neighborhood-StorRetail Trade-Food Stores0.2