| Media Management Inc. | 07/01/2019 | Acquired | Sponsorship Science | Chesterfield, MO |
| Big Group | 08/01/2019 | Acquired | Brandworks | Amsterdam |
| Big Group | 08/01/2019 | Acquired | 230V | Amsterdam, Noord-Holland |
| Data Decisions Group | 08/01/2019 | Acquired | Reach Analytics | Redwood City, CA |
| Finn Partners | 09/01/2019 | Acquired major stake | CatchOn | Hong Kong |
| RTL Group | 09/01/2019 | Acquired | Yospace | Staines-Upon-Thames |
| Wheelhouse Entertainment | 10/01/2019 | Acquired major stake | Portal A | San Francisco, California |
| Didit | 10/01/2019 | Acquired | Print Digital Plus | New York |
| You & Mr Jones | 10/01/2019 | Acquired major stake | Inside Ideas Group (Incl. Oliver) | London |
| AdGeek | 11/01/2019 | Acquired major stake | The Studio by CtrlShift | Singapore |
| Next 15 | 11/01/2019 | Acquired | Planning-Inc Limited | London |
| Cinven | 14/01/2019 | Invested | RTB House | Warsaw |
| Advent International | 14/01/2019 | Acquired | Popcorn Global | Melbourne |
| MyCleverGroup | 14/01/2019 | Acquired | HCL Marketing | Stoke-on-Trent, Staffordshire |
| Vivaldi | 15/01/2019 | Acquired | Gravity Thinking | London |
| CM Group | 15/01/2019 | Acquired | Sailthru | New York |
| CM Group | 15/01/2019 | Acquired | Liveclicker | Cupertino, CA |
| Salesforce.org | 15/01/2019 | Acquired | roundCorner | Villanova, PA |
| Providence Equity Partners | 15/01/2019 | Acquired | Leiki | Helsinki |
| WE Communications | 15/01/2019 | Acquired | Codeword | New York |
| YDM Thailand | 16/01/2019 | Acquired | FCB Bangkok | Bangkok |
| Urban Airship | 16/01/2019 | Acquired | Accengage | Paris |
| Integrate | 16/01/2019 | Acquired | ListenLoop | Hicksville, NY |
| Integrate | 16/01/2019 | Acquired | ListenLoop | Hicksville, NY |
| rbb Communications | 17/01/2019 | Acquired | Z|COMM | Miami, Florida |
| REQ | 17/01/2019 | Acquired | SpeakerBox | Vienna, VA |
| A.T. Kearney | 17/01/2019 | Acquired | Cervello | Boston, MA |
| Dalton Agency | 18/01/2019 | Acquired | Anode | Nashville, TN |
| Claritas | 21/01/2019 | Acquired | AcquireWeb | Foster City, CA |
| Dentsu | 22/01/2019 | Acquired | Filter | Seattle, Washington |
| Adjust | 22/01/2019 | Acquired | Unbotify | Ramat Yishai, Northern Region |
| Narvar | 22/01/2019 | Acquired | Kronos Care | Paris |
| UserTesting | 25/01/2019 | Acquired | UserMuse | Alexandria, Virginia |
| OKD Marketing | 28/01/2019 | Acquired | MJM Media | Hamilton, Ontario |
| Havas Group | 28/01/2019 | Acquired 51% | Estonian Idea and Lithuanian Publicum | Vilnius |
| Cision | 29/01/2019 | Acquired | TrendKite | Austin, Texas |
| Argyle Group | 29/01/2019 | Acquired | Changemakers | Winnipeg |
| Argyle Group | 29/01/2019 | Acquired | Context | Vancouver |
| Valassis | 29/01/2019 | Acquired | GET1FREE | San Diego, CA |
| FanAI | 29/01/2019 | Acquired | Waypoint Media | New York |
| Reach4entertainment | 30/01/2019 | Acquired 50% | Buzz 16 Productions | London |
| Periscope Equity | 31/01/2019 | Invested | Power Digital Marketing | San Diego, CA |
| Publicis Groupe | 01/02/2019 | Acquired remaining 24.9% | Blue 449 (remaining stake) | London |
| Insignia Capital Group | 04/02/2019 | Acquired minority | MediaAlpha | Los Angeles, CA |
| Switch Media | 04/02/2019 | Acquired | Mediasmiths AB | Stockholm, Stockholm County |
| Dricki | 05/02/2019 | Acquired | Etalktech.Com | ? |
| Taptica | 05/02/2019 | Acquired | Etalktech.Com | San Francisco, CA |
| Gradient | 05/02/2019 | Merged | Little Arrows | Marina Del Rey, CA |
| United Talent Agency | 05/02/2019 | Acquired | Digital Brand Architects | West Hollywood, CA |
| ALTAVIA | 06/02/2019 | Acquired | ASK Marketing | Montréal, Québec |
| Jasmine | 07/02/2019 | Acquired | D2 Marketing | Aberdeen |
| Finn Partners | 07/02/2019 | Acquired | Small Army | Boston, MA |
| Fundamental Media | 08/02/2019 | Acquired | Hooplot Associates | Amstelveen |
| Active International | 11/02/2019 | Acquired | Paykel Media | North Sydney, NSW |
| Altamont Capital Partners | 11/02/2019 | Acquired | Publicis Health Solutions | New York |
| Gemspring Capital | 11/02/2019 | Acquired | CKR Interactive | Campbell, CA |
| Nielsen | 12/02/2019 | Acquired assets | Sorenson Media | Draper, UT |
| Gushcloud | 13/02/2019 | Acquired | DSTNCT | Singapore |
| Millpond Equity Partners | 13/02/2019 | Invested | Futuri Media | Seven Hills, Ohio |
| Next 15 | 13/02/2019 | Acquired | Custom Research division of Wealth-X, formerly Ledbury Research. | London |
| Finn Partners | 14/02/2019 | Acquired | Moorgate Communications | London |
| ChizComm | 14/02/2019 | Acquired | Beacon Media | New Jersey |
| Connatix | 14/02/2019 | Acquired | Kamidoo | - |
| LDC | 14/02/2019 | Acquired | Bluedog | London |
| Avtex | 15/02/2019 | Acquired | Automated Voice & Data Solutions (AVDS) | Houston, Texas |
| Apple | 18/02/2019 | Acquired | DataTiger | London |
| Dentsu | 19/02/2019 | Acquired | BJL | Manchester |
| Outbrain | 21/02/2019 | Acquired | Ligatus | Cologne, North Rhine-Westphalia |
| Dentsu | 21/02/2019 | Acquired | Happy Marketer | Singapore |
| Lansons | 22/02/2019 | Acquired majority stake | Intermarket | New York |
| Reach4entertainment | 22/02/2019 | Acquired | Sold Out | London |
| KWP | 26/02/2019 | Acquired | O’Rourke Public Relations | |
| Dentsu | 27/02/2019 | Acquired | Comunica+A | Madrid |
| Gravity Global | 27/02/2019 | Acquired | JJ Marketing | Oxford |
| Informatica | 28/02/2019 | Acquired | AllSight | Toronto |
| Accenture | 04/03/2019 | Acquired | ?What If! | London |
| Goodstuff | 04/03/2019 | Invested | Love Sugar Science | Manchester |
| Goodstuff | 04/03/2019 | Invested | Sixteenbynine | London |
| Accenture | 05/03/2019 | Acquired | Hjaltelin Stahl | Copenhagen |
| Obility | 05/03/2019 | Acquired | Haatzama Marketing | Portland |
| Prophet | 07/03/2019 | Acquired | Springbox | Austin, TX |
| Talon | 07/03/2019 | Acquired | Grandesign | Los Angeles, CA |
| Accel-KKR | 08/03/2019 | Acquired | Collabspot (Email Tools) | Singapore |
| Affle | 13/03/2019 | Acquired | Shoffr | Singapore |
| MDC Partners | 13/03/2019 | Acquired | This Also | Brooklyn, New York |
| Dept | 13/03/2019 | Acquired | Rocket Insights | Newburyport, Massachusetts |
| Living Bridge | 13/03/2019 | Invested | Brainlabs | London |
| HCL Tech | 13/03/2019 | Acquired | Strong-Bridge Envision | Seattle, WA |
| Kayne Partners | 13/03/2019 | Invested | Ideas United | Atlanta, GA |
| Bridgeline Digital | 14/03/2019 | Acquired assets | Stantive Technologies Group (Certain assets, including OrchestraCMS) | Kingston, ON |
| Stagwell Group | 14/03/2019 | Acquire a minority stake | MDC Partners | New York |
| Conversocial | 20/03/2019 | Acquired | Assist | San Francisco, California |
| Dentsu | 20/03/2019 | Acquired | Redder Advertising | Ho Chi Minh City |
| Fishawack Group | 20/03/2019 | Acquired | Dudnyk | Horsham, PA |
| ClickDimensions | 22/03/2019 | Acquired | Sweetspot | New York |
| The OutCast Agency | 25/03/2019 | Acquired | Sepia | London |
| McDonald’s | 26/03/2019 | Acquired | Dynamic Yield | New York |
| Accenture | 26/03/2019 | Acquired | Storm Digital | Groningen |
| Duncan Channon | 26/03/2019 | Acquired | A2G | Los Angeles, California |
| Investis Digital | 28/03/2019 | Acquired | Vertical Measures | Phoenix, AZ |
| Mailchimp | 28/03/2019 | Acquired | LemonStand | Vancouver |
| Nativo | 01/04/2019 | Acquired | SimpleReach | New York |
| Perion Network | 01/04/2019 | Acquired | Septa Communications (“Captain Growth”) | Kyiv |
| GrowthOps | 01/04/2019 | Acquired | Entrago | Fortitude Valley, Queensland |
| Jellyfish | 02/04/2019 | Acquired | Latitude | London |
| Ansira | 02/04/2019 | Acquired | BrightWave | Atlanta, GA |
| Accenture | 03/04/2019 | Acquired | Droga5 | New York |
| AVENIR GLOBAL | 03/04/2019 | Acquired | Hanover | London |
| Centerbridge Partners | 04/04/2019 | Acquired | IBM’s marketing and commerce software offerings | New York |
| Blue Acorn iCi | 04/04/2019 | Acquired | BrandShop | Shelton, CT |
| Integrate | 04/04/2019 | Acquired | Akkroo | London |
| Once Upon A Time (OUAT) | 05/04/2019 | Acquired | IdeaWork Studio | New York |
| Accenture | 08/04/2019 | Acquired | Shackleton | Madrid |
| AirPR (now Onclusive) | 09/04/2019 | Acquired | Ozmotik | San Francisco, CA |
| Stagwell Group | 09/04/2019 | Acquired | Multiview | Irving, Texas |
| Calise Partners | 09/04/2019 | Acquired | Imaginuity® | Dallas, TX |
| NVE Experience Agency | 10/04/2019 | Acquired | The Future Party | Beverly Hills, CA |
| August Spark | 10/04/2019 | Acquired | WebLinc’s Agency Division | Philadelphia, PA |
| Aarav Solutions | 11/04/2019 | Acquired | NEXwhaT Consulting Services | Ahmedabad, Gujarat |
| MMGY Global | 11/04/2019 | Acquired | Digital Spring | London |
| Heartbeat | 11/04/2019 | Acquired | Iconery | Venice, CA |
| Walmart | 11/04/2019 | Acquired | Polymorph Labs | San Francisco, CA |
| IPG (Rogers & Cowan) | 11/04/2019 | Merged | Octagon's First Call | Los Angeles |
| LiveRamp | 11/04/2019 | Acquired | Faktor | Amsterdam |
| Red Ventures | 12/04/2019 | Acquired | HigherEducation.com | Houston, TX |
| Publicis Groupe | 14/04/2019 | Acquired | Epsilon | Irving, Texas |
| Zeta Global | 19/04/2019 | Acquired | Sizmek (certain assets) | New York |
| Madden Media | 22/04/2019 | Merged | Burghardt+Doré | Carmel-by-the-Sea, CA |
| Growth Catalyst Partners | 22/04/2019 | Acquired | InboxMarketer | Guelph, Ontario |
| Upland Software | 22/04/2019 | Acquired | PostUp | Austin, TX |
| theSkimm | 23/04/2019 | Acquired | Purple | Brooklyn, NY |
| Echo Myanmar | 23/04/2019 | Merged | RevoTech | Yangon, San Chaung Township |
| Broadsign | 23/04/2019 | Acquired | Ayuda | Montreal |
| SutherlandGold Group | 23/04/2019 | Acquired | Astro Media | New York |
| Verblio | 24/04/2019 | Acquired | Automagical | San Francisco, CA |
| MERGE | 25/04/2019 | Acquired | BEAM | Boston, MA |
| Obviously | 25/04/2019 | Acquired | ZAM | Paris |
| Zapwater Communications | 25/04/2019 | Acquired | Cheryl Andrews Marketing Communications | Coral Gables, FL |
| Hiip | 25/04/2019 | Acquired | BP Network | Jakarta |
| S4 Capital | 29/04/2019 | Acquired | Caramel Pictures | Amsterdam |
| S4 Capital | 29/04/2019 | Merged | ProgMedia | São Paulo |
| RSBG Infrastructure | 30/04/2019 | Acquired | The Yard Creative | London |
| Mapp | 30/04/2019 | Acquired | Webtrekk | Berlin |
| The Possibility Partnership | 29/04/2019 | Acquired | Appetite Communications | North Sydney, NSW |
| Validity | 01/05/2019 | Acquired | Return Path | Boston |
| Next 15 | 01/05/2019 | Acquired | Rsquared Communication | San Francisco |
| RNL | 02/05/2019 | Acquired | Converge | Cedar Rapids, IA |
| PwC | 05/05/2019 | Acquired | Teambase (consulting division) | Dubai |
| TABS Analytics | 7/05/2019 | Acquired | Decision Insight | Kansas City, MO |
| SPRG | 07/05/2019 | Acquired 20% | Financial & Corporate Relations (FCR) | Sydney |
| DMI | 08/05/2019 | Acquired | Pragiti | Santa Clara |
| Acquia | 08/05/2019 | Acquired | Mautic | Medford, MA |
| Broadsign | 08/05/2019 | Acquired | Campsite | Montreal |
| Pareteum | 08/05/2019 | Acquired | Devicescape | San Francisco |
| Deloitte | 09/05/2019 | Acquired | Pervorm | Amsterdam |
| Sitecore | 09/05/2019 | Acquired | Hedgehog Development | Holbrook, NY |
| Erie Street Capital & PSP Capital | 09/05/2019 | Invested | 3Q Digital | San Mateo, CA |
| QuinStreet | 10/05/2019 | Acquired | CloudControlMedia | Annapolis, Maryland |
| KWP | 10/05/2019 | Acquired | Boab | Parap, Northern Territory |
| Havas Group | 10/05/2019 | Acquired | Think Design | New Delhi |
| Ackroo | 10/05/2019 | Acquired | iQ7/24 | Montreal |
| Perficient | 13/05/2019 | Acquired | Sundog Interactive | Fargo, ND |
| Hotwire | 13/05/2019 | Acquired | Precinct | Pyrmont, NSW |
| ProKarma | 13/05/2019 | Acquired | Gamma Partners | Chicago |
| Pegasystems | 14/05/2019 | Acquired | In the Chat (ITC) | Ontario |
| Brand Networks | 14/05/2019 | Acquired | Clickable | New York |
| Mass Luminosity | 14/05/2019 | Acquired | Wheelhouse Marketing and PR | Fort Worth, TX |
| ServiceNow | 14/05/2019 | Acquired | Appsee | New York |
| AEA Investors | 14/05/2019 | Acquired | Clickable | New York |
| CM Group | 14/05/2019 | Acquired | Vuture | London |
| Pegasystems | 14/05/2019 | Acquired | In The Chat (ITC) | Waterloo, Ontario |
| TapClicks | 15/05/2019 | Acquired | StatX | Santa Clara, CA |
| TransUnion | 15/05/2019 | Acquired | TruSignal | St. Cloud, MN |
| Chello | 15/05/2019 | Acquired | Digilante | Sydney |
| Webedia | 16/05/2019 | Acquired | Quill | London |
| Madison Dearborn Partners | 16/05/2019 | Invested | InMoment | Salt Lake City, UT |
| Cheil Worldwide | 16/05/2019 | Acquired | Operam Creative Group | Los Angeles |
| LDC | 16/05/2019 | Invested | MSQ Partners | London |
| KPMG | 17/05/2019 | Acquired | Love Agency | Sydney |
| SugarCRM | 17/05/2019 | Acquired | Salesfusion | Atlanta, GA |
| OverActive Media | 21/05/2019 | Acquired | MediaXP | Toronto |
| UDG Healthcare | 21/05/2019 | Acquired | Incisive Health | London |
| UDG Healthcare | 21/05/2019 | Acquired | Putnam Associates | Boston, MA |
| Wix | 22/05/2019 | Acquired | Gefen | Tel Aviv |
| Huntsworth | 21/05/2019 | Acquired 85% | Kyne | Dublin |
| Huntsworth | 21/05/2019 | Acquired 70% | Creativ-Ceutical (CC) | Luxembourg City |
| IE Digital | 21/05/2019 | Acquired | Fresh Ventures Advisory | Albert Park, Victoria |
| Her Campus Media | 22/05/2019 | Acquired | Lala Media Group, Inc. | New York |
| Freshworks | 22/05/2019 | Acquired | Natero | San Francisco |
| CTI Digital | 23/05/2019 | Acquired | Nublue | Lancaster |
| Paragon Group | 24/05/2019 | Acquired | Celerity Information Services | Dartford |
| Paragon Group | 24/05/2019 | Acquired | ORM | London |
| Paragon Group | 24/05/2019 | Acquired | Graft Services | Dartford |
| Zendesk | 24/05/2019 | Acquired | Smooch | Montreal |
| OSF Global | 24/05/2019 | Acquired | Blueleaf | Tattenhall, Cheshire |
| WeQ | 28/05/2019 | Acquired | Booster Studios (Renamed: WeQ Studios) | Berlin |
| Reputation Institute | 29/05/2019 | Acquired | Cormex Research | Toronto |
| New Mountain Capital | 29/05/2019 | Invested | W2O Group | San Francisco |
| Rave Digital | 30/05/2019 | Acquired | Aheadworks | Minsk & Mogilev |
| LinkedIn | 30/05/2019 | Acquired | Drawbridge | San Mateo, CA |
| Foursquare | 31/05/2019 | Acquired | Placed | Seattle, WA |
| Mod Op | 03/06/2019 | Acquired | MCC | Dallas, TX |
| Miaozhen Systems | 03/06/2019 | Acquired | RadioBuy | Beijing |
| MAS Event + Design | 03/06/2019 | Acquired | BeSide Digital | Brooklyn |
| Sublime | 05/06/2019 | Acquired | Adledge | Paris |
| Medallia | 05/06/2019 | Acquired | Cooladata | Tel Aviv |
| CVC Capital Partners | 10/06/2019 | Acquired major stake | Teneo | New York |
| Welocalize | 11/06/2019 | Acquired | SearchStar | Bath |
| Xpressdocs | 11/06/2019 | Acquired | Amazingmail | Phoenix, AZ |
| Logi Analytics | 11/06/2019 | Acquired | Zoomdata | Reston, VA |
| The Digital Track | 12/06/2019 | Acquired | Krios | Sydney |
| Dentsu | 12/06/2019 | Acquired | Re:Production | Newcastle-Upon-Tyne |
| Dun & Bradstreet | 14/06/2019 | Acquired | Lattice Engines | San Mateo, CA |
| Connect | 17/06/2019 | Acquired | Stratagem | Belfast, Northern Ireland |
| Valtech | 17/06/2019 | Acquired | MJD Interactive | San Diego, CA |
| Bright Mountain Media | 17/06/2019 | Acquired | Inform | Atlanta, GA |
| Cvent | 17/06/2019 | Acquired | DoubleDutch | San Francisco, California |
| Jungle Creations | 17/06/2019 | Merged | Goat Agency | London |
| WebMD | 18/06/2019 | Acquired | Frontline Medical Communications | Parsippany, NJ |
| Amazon | 18/06/2019 | Acquired | Sizmek (ad server & DCO) | New York |
| Hexaware Technologies | 18/06/2019 | Acquired | Mobiquity | Wellesley, MA |
| Colour | 18/06/2019 | Acquired | Bright Blue Wave | Halifax, Nova Scotia |
| Fluent | 19/06/2019 | Acquired | AdParlor | Kansas City, MO |
| UserZoom | 20/06/2019 | Acquired | Validately | New York |
| Havas Group | 20/06/2019 | Acquired Majority Stake | Battery | Hollywood, CA |
| Multiply | 20/06/2019 | Acquired | Umbrla | Denver, Colorado |
| S4 Capital | 21/06/2019 | Acquired | BizTech | Melbourne |
| SEC | 24/06/2019 | Merged | Porta | London |
| LiveRamp | 24/06/2019 | Acquired | Data Plus Math | Boston, Massachusetts |
| MediaJel | 25/06/2019 | Acquired | Caliweedjobs | Walnut Creek, California |
| Contentsquare | 26/06/2019 | Acquired | Pricing Assistant | Paris |
| I-ON Communications Co., Ltd. | 28/06/2019 | Acquired | H9Pitch | Seoul |
| Fusion Group | 28/06/2019 | Acquired Majority Stake | Eat Creative | Minato-ku, Tokyo |
| Leadspace | 28/06/2019 | Acquired | ReachForce | Austin, Texas |
| ContentSquare | 01/07/2019 | Acquired | Clicktale | Tel Aviv |
| Providence Equity Partners | 01/07/2019 | Acquired remaining 25% | Chime Group | London |
| Phoenix Equity Partners | 03/07/2019 | Invested | 1000heads | London |
| Dentsu | 04/07/2019 | Acquired | Davanti Consulting | Auckland |
| Dentsu | 04/07/2019 | Acquired | Ambient Digital Vietnam | Ho Chi Minh City |
| WPP | 04/07/2019 | Acquired major stake | AQuest | Verona |
| Hopscotch | 09/07/2019 | Acquired 35.5% (from 30.5 to 66%) | Sopexa | Paris |
| PAN Communications | 09/07/2019 | Acquired | Capella PR | London |
| LRW Group | 09/07/2019 | Acquired | Greenberg Strategy | Emeryville, CA |
| Coveo | 09/07/2019 | Acquired | Tooso | Milan, Lombardy |
| Marlin Equity Partners | 09/07/2019 | Acquired | Clarus Commerce | Rocky Hill, CT |
| AppLovin | 09/07/2019 | Acquired | SafeDK | Tel Aviv |
| Mountaingate Capital | 10/07/2019 | Acquired major stake | RevUnit | Bentonville, AR |
| TapClicks | 10/07/2019 | Acquired | iSpionage | San Jose, CA |
| Rightpoint | 10/07/2019 | Acquired | Bowfin | Chicago, Illinois |
| Gemspring Capital | 11/07/2019 | Acquired major stake | Rapid Displays | Chicago |
| Pavone Marketing Group | 11/07/2019 | Acquired | Netplus | Philadelphia, PA |
| Pavone Marketing Group | 11/07/2019 | Acquired | Phalanx Digital | Mechanicsburg, PA |
| Vested | 11/07/2019 | Acquired minority stake | Caliber Corporate Advisers | New York |
| Cheetah Digital | 11/07/2019 | Acquired | Wayin | Denver, Colorado |
| Talon | 12/07/2019 | Acquired | Grand Design | London |
| Blackstone | 15/07/2019 | Acquired | Vungle | San Francisco |
| Bain Capital | 15/07/2019 | Acquired 60% stake | Kantar | New York |
| Dentsu | 16/07/2019 | Acquired | Ugam | Mumbai |
| Affinitiv | 18/07/2019 | Merged | AutoLoop | Clearwater, FL |
| Giant Partners | 19/07/2019 | Acquired | Worxstudio | Thousand Oaks, California |
| MMGY Global | 22/07/2019 | Acquired | NEXTFactor | Vancouver, BC |
| Hero Digital | 23/07/2019 | Acquired | Bulldog Solutions | Austin, TX |
| Bustle Digital Group | 23/07/2019 | Acquired | Inverse | New York |
| Selbey Anderson | 24/07/2019 | Acquired | Flagship Consulting | London |
| WPP | 24/07/2019 | Acquired | InterMedia | Sunnyvale, California |
| Snapworx Digital | 25/07/2019 | Acquired | Mobext Philippines | Makati, National Capital Region |
| Mahindra Group | 30/07/2019 | Acquired | Mad*Pow | Portsmouth, NH |
| Think HQ | 31/07/2019 | Acquired | CultureVerse | Melbourne, Victoria |
| ORB | 31/07/2019 | Acquired | Superdream | South Brisbane, QLD |
| Orb | 31/07/2019 | Acquired | Superdream | Bromsgrove |
| Resources Global Professionals | 31/07/2019 | Acquired | Veracity Consulting Group | Richmond, VA |
| Argyle Group | 24/07/2019 | Acquired | Matchstick | Toronto |
| Jellyfish | 25/07/2019 | Acquired | Perelview | Tel Aviv |
| Cint | 01/08/2019 | Acquired | P2Sample | Alpharetta, GA |
| Bidstack Group | 01/08/2019 | Acquired | Pubguard | London |
| Fishawack Group | 01/08/2019 | Acquired | 2e Creative | Saint Louis, MO |
| Innocean Worldwide | 01/08/2019 | Acquired | Wellcom Group | Melbourne |
| O3 Industries | 02/08/2019 | Acquired | Peer39 | New York |
| Wpromote | 05/08/2019 | Acquired | Growth Pilots | San Francisco |
| Thoma Bravo | 05/08/2019 | Acquired | JD Power | Costa Mesa, CA |
| ProKarma | 05/08/2019 | Acquired | Connective DX | Portland, OR |
| Microsoft | 05/08/2019 | Acquired | PromoteIQ | New York, NY |
| Accenture | 05/08/2019 | Acquired | Northstream | Stockholm, Stockholm |
| Nike | 07/08/2019 | Acquired | Celect | Boston, Massachusetts |
| Chemistry | 08/08/2019 | Acquired major stake | Pinta | Coral Gables, Florida |
| InMarket | 09/08/2019 | Acquired | Thinknear | Culver City, CA |
| Famous Innovations | 09/08/2019 | Acquired | Three Bags Full | Mumbai |
| 9thWonder | 12/08/2019 | Acquired | The Marketing Consortium | Dallas, Texas |
| S4 Capital | 12/08/2019 | Acquired | IMA Influencer Marketing Agency | Amsterdam |
| Globant | 12/08/2019 | Acquired | Belatrix Software | Redwood City, California |
| Accenture | 12/08/2019 | Acquired | INSITUM | Chicago, Illinois |
| Opus Agency | 12/08/2019 | Acquired | Clarity Creative | Park City, UT |
| PLYmedia | 12/08/2019 | Acquired | Webpals Mobile | Tel Aviv |
| Publicis Groupe | 14/08/2019 | Acquired | MBM | Auckland |
| Scaleworks | 16/08/2019 | Acquired | Nextopia | Toronto, Ontario |
| Publicis Groupe | 19/08/2019 | Acquired | Rauxa | Irvine, CA |
| NewsSingapore | 20/08/2019 | Acquired | We! Interactive | Singapore |
| NewsSingapore | 20/08/2019 | Acquired | KatalystM | Singapore |
| Samba TV | 20/08/2019 | Acquired | Axwave | Menlo Park, California |
| REQ | 20/08/2019 | Acquired | Internet Marketing Inc. (IMI) | San Diego, CA |
| Legacy / Bluefocus | 23/08/2019 | Acquired | BlueFocus / Legacy | Beijing |
| Airship | 27/08/2019 | Acquired | Apptimize | San Francisco |
| 360insights | 27/08/2019 | Acquired | Ohana | Wilmington, DE |
| Moving Walls | 27/08/2019 | Acquired | Quad42 | Chennai |
| Bazaarvoice | 28/08/2019 | Acquired | Influenster | New York, NY |
| Beattie | 28/08/2019 | Acquired | Serious | Belfast |
| Dentsu | 29/08/2019 | Acquired | MuteSix | Los Angeles |
| Blackhawk Network | 29/08/2019 | Acquired | Edge Loyalty Systems | Melbourne |
| Accenture | 30/08/2019 | Acquired | Analytics8 | Sydney |
| Havas Group | 04/09/2019 | Acquired 51% | Buzzman | Paris |
| Finn Partners | 04/09/2019 | Acquired | Lazar Partners | New York |
| LDC | 04/09/2019 | Acquired major stake | Instinctif Partners | London |
| Big Red Group (BRG) | 04/09/2019 | Acquired | Lime&Tonic | Sydney |
| broadhead | 04/09/2019 | Acquired | Kohnstamm Communications | Saint Paul, MN |
| SurveyMonkey | 04/09/2019 | Acquired | GetFeedback | San Francisco |
| Opus Agency | 09/09/2019 | Acquired | Tencue Productions | Berkeley, CA |
| Leger | 09/09/2019 | Acquired | National Research Group (NRG) | Vancouver, BC |
| McDonald’s | 10/09/2019 | Acquired | Apprente | Mountain View, CA |
| Accenture | 10/09/2019 | Acquired | Pragsis Bidoop | Madrid |
| Benchmark Email | 10/09/2019 | Merged | Hatchbuck | St. Louis, MI |
| Verndale | 11/09/2019 | Acquired | Aware Web Solutions | Minneapolis, MN |
| Lab | 11/09/2019 | Acquired | Reflect Digital | Kent |
| KK Communications | 11/09/2019 | Merged | Anteater Communications | London |
| Opus Agency | 12/09/2019 | Acquired | Number 20 | London |
| Jerrick Media Holdings | 12/09/2019 | Acquired | Seller's Choice | Fort Lee, NJ |
| Future Media | 12/09/2019 | Acquired | Oak & Jackal | Melbourne |
| GlobalLogic | 12/09/2019 | Acquired | Skookum | Charlotte, NC |
| LDC | 12/09/2019 | Acquired | HealthCare21 | Macclesfield, Cheshire |
| RKD Group | 13/09/2019 | Acquired | Direct Point Group | Toronto |
| SITO Mobile | 16/09/2019 | Acquired | MediaJel | Walnut Creek, CA |
| Ocelot Partners | 16/09/2019 | Acquired | Visual Art Media | Stockholm |
| Mediaocean | 16/09/2019 | Acquired | PIN Systems | Kuala Lumpur |
| Mediaocean | 16/09/2019 | Acquired | Zanthuu | Shanghai |
| Accomplice | 17/09/2019 | Acquired | Design & Manufacturing (DSNMFG) | Austin, TX |
| Accomplice | 17/09/2019 | Acquired | Spatial Cinematics | Austin, TX |
| Redengine SCC Group | 17/09/2019 | Acquired | SixtyFour Films | Surry Hills, New South Wales |
| Havas Group | 17/09/2019 | Acquired | Langoor | Bengaluru |
| Freshwater | 17/09/2019 | Acquired | Red Squirrel Communications | London |
| SilverPush | 18/09/2019 | Acquired | BetterButter | New Delhi, Delhi |
| Bully Pulpit Interactive (BPI) | 18/09/2019 | Acquired | Aperture Strategies | Washington, D.C. |
| Blue Acorn iCi | 18/09/2019 | Acquired | Mediotype | Boulder, CO |
| Ruder Finn Group | 19/09/2019 | Acquired | SPI Group | Fairfield, New Jersey |
| Rokt | 19/09/2019 | Acquired | OfferLogic | Waltham, MA |
| BWF | 19/09/2019 | Acquired | Groundwork Digital | Los Angeles |
| Innovid | 20/09/2019 | Acquired | Herolens | New York |
| Grail Insights | 23/09/2019 | Acquired | ConStat | Oakland, CA |
| Geronimo | 25/09/2019 | Acquired | Data Hatch | Pyrmont, NSW |
| Facebook | 25/09/2019 | Acquired | CTRL-Labs | New York |
| Omnicom | 26/09/2019 | Acquired major stake | Smart Digital GmbH | Gerlinger |
| Sinch | 26/09/2019 | Acquired | myElefant | Paris |
| App Annie | 26/09/2019 | Acquired | Libring | Cambridge, MA |
| J2 Global | 19/09/2019 | Acquired | Spiceworks | Austin, TX |
| Americaneagle.com | 01/10/2019 | Acquired | Athracian | Sofia |
| Salsify | 01/10/2019 | Acquired | B2X Partners | Westminster, Maryland |
| Next 15 | 01/10/2019 | Acquired | Health Unlimited | London |
| AArete | 2/10/2019 | Acquired | Third I | Washington D.C. |
| Access Intelligence | 02/10/2019 | Acquired | Pulsar | London |
| EVERFI | 02/10/2019 | Acquired | EdComs | London |
| Work & Co | 02/10/2019 | Acquired | Tendigi | Brooklyn, NY |
| Oracle | 03/10/2019 | Acquired | CrowdTwist | New York, New York |
| AnalogFolk | 03/10/2019 | Acquired | Serum Consulting | London |
| Accenture | 03/10/2019 | Acquired | Nytec | Kirkland, Washington |
| Samba TV | 04/10/2019 | Acquired | Wove | San Francisco, CA |
| S4 Capital | 08/10/2019 | Acquired | Firewood | San Francisco, CA |
| Tritium | 08/10/2019 | Invested | Project X | New York |
| Accenture | 08/10/2019 | Acquired | Futuremove Automotive | Beijing |
| Gravity Global | 09/10/2019 | Acquired | Further Digital Marketing | Norwich, Norfolk |
| W2O Group | 09/10/2019 | Acquired | Arcus Medica | Philadelphia, PA |
| LRW Group | 09/10/2019 | Acquired | Salt Branding | San Francisco, CA |
| Adjust | 10/10/2019 | Acquired | Force Operation X（F.O.X） | |
| Kibo | 10/10/2019 | Acquired | Monetate | Conshohocken, Pennsylvania |
| LiiV | 10/10/2019 | Acquired | Telmar | New York, New York |
| Accenture | 11/10/2019 | Acquired | Sutter Mills | Paris |
| NDN Group | 13/10/2019 | Acquired | Freedom Communications | Hong Kong |
| ONEHealth Communications | 14/10/2019 | Acquired | Bartlett Davis Communications | Tadworth, Surrey |
| Nike | 14/10/2019 | Acquired | TraceMe | Seattle, WA |
| Inc & Co | 15/10/2019 | Acquired | Fast Web Media | Manchester |
| Inc & Co | 15/10/2019 | Acquired | Cuhu | Manchester |
| Genpact | 15/10/2019 | Acquired | Rightpoint | Chicago, IL |
| Broadridge | 16/10/2019 | Acquired | Appatura | Ridgefield Park, New Jersey |
| West Monroe Partners | 17/10/2019 | Acquired | GoKart Labs | Minneapolis, MN |
| Tilting Point | 17/10/2019 | Acquired | Gondola | New York |
| Accenture | 17/10/2019 | Acquired | Happen | London |
| Dentsu | 17/10/2019 | Acquired | EBP | Shanghai |
| Power Digital Marketing | 17/10/2019 | Acquired | Factorial Digital | New York |
| Boston Consulting Group (BCG) | 18/10/2019 | Acquired | AllofUs | London |
| Entropia | 18/10/2019 | Acquired | Vostok VR | Singapore |
| AT&T | 18/10/2019 | Acquired | Clypd | Somerville, MA |
| Global | 18/10/2019 | Acquired | MMD Media | Landsmeer, Noord Holland |
| Rubicon Project | 21/10/2019 | Acquired | RTK | New York |
| Cognizant | 22/10/2019 | Acquired | Contino | London |
| Mailgun | 22/10/2019 | Acquired | Mailjet | Paris |
| Roku | 22/10/2019 | Acquired | Dataxu | Boston, MA |
| Mastercard | 22/10/2019 | Acquired | SessionM | Boston, MA |
| GlobalLogic | 24/10/2019 | Acquired | Assign Group | Gothenburg |
| S4 Capital | 28/10/2019 | Merged | ConversionWorks | London |
| S4 Capital | 28/10/2019 | Merged | Datalicious Korea | Seoul |
| Quadrant Private Equity | 29/10/2019 | Acquired | QMS Media | South Melbourne, Victoria |
| Kubient | 29/10/2019 | Acquired | Fidelity Media | New York |
| Cision | 30/10/2019 | Acquired | Unmetric | New York |
| Accenture | 31/10/2019 | Acquired | Bow & Arrow | London |
| H.I.G. Capital | 21/11/2019 | Acquired | SourceLink | Chicago |
| Seismic Software, Inc. | 06/11/2019 | Acquired | Percolate | New York |
| Vigor | 17/10/2019 | Acquired | Chimney Group | Stockholm |
| LRW Group | 07/11/2019 | Acquired | T3 | Austin, TX |
| Mahindra Group | 05/11/2019 | Acquired | BORN Group | New York |
| ServiceNow | 01/11/2019 | Acquired | Attivio | Boston |
| S4 Capital | 20/11/2019 | Acquired | WhiteBalance | New Delhi |
| Reply | 15/11/2019 | Acquired | Threepipe | London |
| TransPerfect | 07/10/2019 | Acquired | Lylo | Paris |
| Hakuhodo DY Holdings | 14/11/2019 | Acquired | Winter Egency: W/E | Bangkok |
| WillowTree | 21/11/2019 | Merged | Dynamit Technolgoies | Columbus, OH |
| Ocean Outdoor | 21/11/2019 | Acquired | AdCityMedia | Stockholm |
| TransPerfect | 06/09/2019 | Acquired | MoGi Group | Dublin |
| InMobi | 25/11/2019 | Acquired | Roposo | Gurugram |
| UDG Healthcare | 26/11/2019 | Acquired | Canale Communications | San Diego, CA |
| Acceleration Community of Companies | 06/11/2019 | Acquired | MKG Productions | New York |
| Acceleration Community of Companies | 06/11/2019 | Acquired | Pink Sparrow | New York |
| Accenture | 14/11/2019 | Acquired | SILVEO | Neuilly-Sur-Seine |
| TransPerfect | 07/10/2019 | Acquired | Lassostudios | Madrid |
| IVE Group Limited | 26/11/2019 | Acquired | Salmat Marketing Solutions | Sydney |
| Integral Ad Science | 21/11/2019 | Acquired | ADmantX | Milan |
| OmniTI Computer Consulting, Inc. | 01/11/2019 | Acquired | eDataSource | New York |
| CDP Amperity | 06/11/2019 | Acquired | Custora | New York |
| Quotient Technology | 07/11/2019 | Acquired | Ubimo | New York |
| Insight Partners | 18/11/2019 | Acquired | Idio | London |
| W20 Group | 06/11/2019 | Acquired | ISO.health | London |
| Finn Partners | 08/11/2019 | Acquired | ZPR | London |
| Netcore Solutions | 08/11/2019 | Acquired | Boxx.ai | Bangalore |
| DoubleVerify | 08/11/2019 | Acquired | Ad-Juster | San Diego |
| DiscoverOrg | 15/11/2019 | Acquired | Komiko | Seattle |
| TransPerfect | 15/11/2019 | Acquired | Chulengo | Buenos Aires |
| Moburst | 20/11/2019 | Acquired | Clutch | Rishpon |
| Marketscience Consulting | 13/11/2019 | Merged | Truesight Consulting | New York |
| TransPerfect | 15/11/2019 | Acquired | Scheune München Mediaproduction | Munich |
| Kin + Carta | 22/11/2019 | Acquired | Spire Digital | Denver |
| Bastion Collective | 04/11/2019 | Acquired | db5 | Los Angeles |
| W2O Group | 11/11/2019 | Acquired | Radius Digital Science | Montclair, NJ |
| ChrysCapital | 24/10/2019 | Acquired | Revel Consulting | Seattle, WA |
| AlchemyLeads Search Marketing | 21/11/2019 | Acquired | Co Flex Marketing | Chicago |
| TransPerfect | 07/10/2019 | Acquired | AGM Factory | Rennes |
| Seven Letter | 07/11/2019 | Acquired | Tessio Labs | New York |
| TransPerfect | 07/10/2019 | Acquired | Sublime Subtitling & Translation | Madrid |
| Matter Unlimited | 21/11/2019 | Merged | Agent of Change Events | New York |
| The Brewery | 12/11/2019 | Acquired minor stake | Clairty PR | New York |
| connective3 | 12/11/2019 | Acquired | Silverthorn | London |
| Proof Analytics | 20/12/2019 | Acquired | Musqot | Stockholm |
| Providence Equity Partners | 18/12/2019 | Acquired | Smartly.io | Helsinki |
| Sam's Club | 12/12/2019 | Acquired | Triad Retail Media (tech stack) | St Petersburg, Florida |
| Accenture | 16/12/2019 | Acquired | Clarity Insights | Chicago |
| EducationDynamics | 02/12/2019 | Acquired | Thruline Marketing | Lenexa, KS |
| Rubicon Project | 19/12/2019 | Merged | Telaria | New York |
| 20/20 Research | 11/12/2019 | Acquired | Over the Shoulder | Chicago, Illinois |
| Acquia | 12/12/2019 | Acquired | AgilOne | Sunnyvale, CA |
| Advice Media | 17/12/2019 | Acquired | Page 1 Solutions | Lakewood, CO |
| Episerver | 17/12/2019 | Acquired | Insite Software | Minneapolis, MN |
| Bruin Sports Capital | 16/12/2019 | Acquired | Two Circles | London |
| Terminus | 17/12/2019 | Acquired | Sigstr | Indianapolis, IN |
| Jellyfish | 16/12/2019 | Acquired | Social Life | London |
| Accenture | 01/12/2019 | Acquired | Apis Group | Canberra |
| Stagwell Group | 18/12/2019 | Acquired | The Search Agency | Glendale, CA |
| Finn Partners | 04/12/2019 | Acquired | Medical & Health Consulting | Paris |
| Uberflip | 03/12/2019 | Acquired | SnapApp | Boston, Massachusetts |
| Sawaya Consulting | 24/12/2019 | Acquired | Emerson Stone | Boulder, CO |
| Sprinklr | 06/12/2019 | Acquired | Nanigans (performance business) | Boston, MA |
| Havas Group | 11/12/2019 | Acquired | Gate One | London |
| Smart AdServer | 18/12/2019 | Acquired | LiquidM | Berlin |
| IPSOS | 10/12/2019 | Acquired | Data Liberation | London |
| FASTSIGNS International | 20/12/2019 | Acquired | Sign Me Up Signs & Advertising | Long Island, NY |
| Ello | 03/12/2019 | Merged | Talenthouse | London |
| Dentsu | 04/12/2019 | Acquired | Chef Smart Marketing Mix | Medellin |
| Story Worldwide | 05/12/2019 | Merged | VonShine Industries | New York |
| OvareGroup | 12/12/2019 | Acquired | Reunion | Toronto |
| Clarity PR | 11/12/2019 | Acquired | Dynamo | London |
| OvareGroup | 12/12/2019 | Acquired | ADM Marketing | Los Angeles |
| TechGenies | 27/12/2019 | Acquired | Mindtap Marketing | Frisco, TX |
| Sawaya Consulting | 24/12/2019 | Merged | Coast To Coast Studio | Salt Lake City, UT |
| Sandstorm | 10/12/2019 | Acquired | Jacobs Agency | Chicago, IL |
| Hawke Media | 10/12/2019 | Acquired | Artemis Digital Media | Los Angeles, CA |
| Medium Rare | 18/12/2019 | Acquired | Storynation | Sydney |
| dovetail solutions | 10/12/2019 | Acquired | Modamedia/SMG | Sacramento |
| Havas Group | 18/12/2019 | Acquired | Shobiz | Mumbai |
| Facebook | 20/12/2019 | Acquired | Packagd | San Francisco, CA |
