| K-Electric | Karachi, Sindh | Visit site |
| K-Factor | Delray Beach, Florida | Visit site |
| K. LIAROMATIS S.A. | Agios Stefanos, Attica | Visit site |
| K2 Power Solutions Inc. | South Bend, Indiana | Visit site |
| K2 Systems US | Oceanside, California | Visit site |
| KALPATARU POWER TRANSMISSION LIMITED | Mumbai, Maharashtra | Visit site |
| KALPATARU PROJECTS INTERNATIONAL LIMITED | Mumbai, Maharashtra | Visit site |
| KAM | Mexico City, Mexico City | Visit site |
| KAMATI LTDA. BIC. | Yumbo, Valle del Cauca | Visit site |
| KATOP Automation | Changzhou Shi, Jiangsu | Visit site |
| KATZEN International, Inc. | Cincinnati, Ohio | Visit site |
| KB Development srl | San Zeno Naviglio, Brescia | Visit site |
| KB Racking | Toronto, Ontario | Visit site |
| KBSO Consulting LLC | Carmel, Indiana | Visit site |
| KEC International Ltd. | Mumbai, Maharashtra | Visit site |
| KEI Wires and Cables | New Delhi, Delhi | Visit site |
| KEMA Labs | Milano, Milan | Visit site |
| KERSTEN | Wanssum, Limburg | Visit site |
| KFI Engineers | Roseville, Minnesota | Visit site |
| KGAL GmbH & Co. KG (KGAL) | Grünwald, Bavaria | Visit site |
| KGBAL Manufacturing LLC | Carol Stream, IL | Visit site |
| KIENLE Beratende Ingenieure GmbH | Ostrach, Baden-Württemberg | Visit site |
| KIGT | Ontario, California | Visit site |
| KIMSEN Aluminum | Yên Phong, Bắc Ninh | Visit site |
| KIN HOMES | New Plymouth, Taranaki | Visit site |
| KIS Group-Sustainability² | Bengaluru, Karnataka | Visit site |
| KISTERS HydroMet | Aachen, North Rhine-Westphalia | Visit site |
| KJTS Group Berhad | Kuala Lumpur, Kuala Lumpur | Visit site |
| KK Group | Ikast, Central Denmark | Visit site |
| KKR | New York, New York | Visit site |
| KLAAFE Engineering Services | Hull, England | Visit site |
| KM-DUC Electricité SA | Nyon, Vaud | Visit site |
| KMT GmbH | München, Bavaria | Visit site |
| KNESTEL Technologie & Elektronik GmbH | Untrasried, Bavaria | Visit site |
| KOC Energy | Üsküdar, Istanbul | Visit site |
| KOLIN Construction | Çankaya, Ankara | Visit site |
| KONARK ENERGY INC | Irving, Texas | Visit site |
| KONE | Espoo, Uusimaa | Visit site |
| KONTROLX Periyodik Kontrol Muayene Hizmetleri | Istanbul, Istanbul | Visit site |
| KOOPMANN Gruppe | Cloppenburg, Lower Saxony | Visit site |
| KOPIA (Korea Photovoltaic Industry Association) | 서울시 강남구 | Visit site |
| KOSOL ENERGIE | Ahmedabad, Gujarat | Visit site |
| KOTSONS | Ramgarh, Rajasthan | Visit site |
| KOWINT | Hong Kong, Hong Kong | Visit site |
| KPMG España | Madrid, Madrid | Visit site |
| KT-Electronic | Roma, Rome | Visit site |
| KTH Innovation | Stockholm, Stockholm | Visit site |
| KWHIQ | Rosmalen, North Brabant | Visit site |
| KWRE | Livermore, California | Visit site |
| KYRA PHOTON TECH PVT LTD | Chennai, Tamil Nadu | Visit site |
| Kaizen Clean Energy | League City, Texas | Visit site |
| Kaizen Design Solutions Pvt. Ltd | Mumbai, Maharashtra | Visit site |
| Kalyon Construction Group | Üsküdar, Istanbul | Visit site |
| Kalyon PV - Solar Technologies | Ankara, Ankara | Visit site |
| Kalyoncu Enerji San. ve Tic. Ltd. Şti. | Ortahisar, Trabzon | Visit site |
| Kalzip | Koblenz, Rhineland-Palatinate | Visit site |
| Kameleon Solar | Roosendaal, North Brabant | Visit site |
| Kanin Energy | Calgary, Alberta | Visit site |
| Kantor Management Consultants | Athina, Attica | Visit site |
| Kapitein BV | Cruquius, North Holland | Visit site |
| Kapture | Melbourne, Victoria | Visit site |
| Karpowership | Gower, Missouri | Visit site |
| Karstsolar | Shenzhen Shi, Guangdong | Visit site |
| Karvy Technologies | Mumbai, Maharashtra | Visit site |
| Kasselman Electric Co., Inc. | Menands, New York | Visit site |
| Katowice City - live, work & invest | Katowice, Silesian Voivodeship | Visit site |
| Kayo Solar | Tempe, Arizona | Visit site |
| Kayser GmbH | Weißenburg in Bayern, Bavaria | Visit site |
| Kedma Solar - קדמה סולארי | Tel Aviv-Yafo, Tel Aviv District | Visit site |
| Keentel Engineering | Tampa, Florida | Visit site |
| Kehua Digital Energy | 恆春鎮, Pingtung County | Visit site |
| KelTech IoE Networks | Dublin, Dublin | Visit site |
| Kelani Cables | Kelaniya, Gampaha | Visit site |
| Kelly | Troy, Michigan | Visit site |
| Kemexon | Genève, Geneva | Visit site |
| Kennedy Industries, Inc. | Wixom, Michigan | Visit site |
| Kenny Solar | Perth, Western Australia | Visit site |
| Kent Power | Rockford, Michigan | Visit site |
| Kermi Raumklima | Plattling, Bavaria | Visit site |
| Kern Solar Structures | Bakersfield, California | Visit site |
| Kern Steel Fabrication Inc. | Bakersfield, California | Visit site |
| Kerrigan Mechanical Ltd. | The Ward, County Dublin | Visit site |
| Kesir | Dilovası, Kocaeli | Visit site |
| Kewo Electric Technology Co.,Ltd | Guangdong | Visit site |
| Key Wind Energy GmbH | Berlin, Berlin | Visit site |
| Keymex Energy | León, Guanajuato | Visit site |
| Keysight Technologies | Santa Rosa, California | Visit site |
| Khosla Ventures | Menlo Park, California | Visit site |
| Kidwell | Lincoln, Nebraska | Visit site |
| Kier Group | Ramsgate, England | Visit site |
| Kilimo | Córdoba, Córdoba | Visit site |
| Kilo Hollow Energy | Richmond, Virginia | Visit site |
| KiloLima | Maadi, Cairo | Visit site |
| KiloNewton | Albuquerque, New Mexico | Visit site |
| Kinect Solar | Austin, Texas | Visit site |
| Kinectrics | Ontario | Visit site |
| Kinematics, LLC | Phoenix, AZ | Visit site |
| King Energy | Durango, Colorado | Visit site |
| Kingdom Solar | Valdosta, Georgia | Visit site |
| Kingspan Insulated Panels UK & Ireland | Holywell, Wales | Visit site |
| Kingspan Isoeste | Goiás, Goiás | Visit site |
| Kingston Process Metallurgy Inc. (KPM) | Kingston, Ontario | Visit site |
| Kingwoohsolar | Anhui | Visit site |
| Kinse Solar | 新豐鄉, Hsinchu County | Visit site |
| Kinsend Metal | 新豐鄉, Hsinchu County | Visit site |
| Kintetsu World Express | 東京都, Tokyo Prefecture | Visit site |
| Kirby Building Systems - A group company of Alghanim Industries | ميناء عبدالله الصناعية, Al Ahmadi | Visit site |
| Kiwa | Rijswijk, South Holland | Visit site |
| Klas Kablo | Şahinbey, Gaziantep | Visit site |
| Klaus Faber | Saarbrücken, Saarland | Visit site |
| Klinger Constructors, LLC | New Mexico | Visit site |
| Klinger und Partner GmbH | Stuttgart, Baden-Württemberg | Visit site |
| Klohn Crippen Berger | Vancouver, British Columbia | Visit site |
| Knick Interface | Huntington Beach, California | Visit site |
| Knobelsdorff | Goodhue, Minnesota | Visit site |
| Koehler Energy Group | Oberkirch, Baden-Württemberg | Visit site |
| Kohler Co. | Kohler, Wisconsin | Visit site |
| Kolb Grading, LLC | St. Charles, Missouri | Visit site |
| Kolbi Pipe Marker Co. | Arlington Heights, Illinois | Visit site |
| Koloğlu Holding | Çankaya, Ankara | Visit site |
| Kong USA | Monte Marenzo, Lecco | Visit site |
| Koolbridge Energy Inc | Wilmington, North Carolina | Visit site |
| Korax Solar | Ráckeve, Pest | Visit site |
| Kord Fire Protection | Studio City, California | Visit site |
| Koubaras Ltd | Athina, Attica | Visit site |
| Koulomb Fast EV Charging | Charlotte, North Carolina | Visit site |
| Koło Naukowe Nova Energia | Kraków, Lesser Poland Voivodeship | Visit site |
| Kraft Solergy | McAllen, Texas | Visit site |
| Kraftfeld Energy | Vienna, Vienna | Visit site |
| Kraftringen | Lund, Skåne | Visit site |
| Kreutzpointner Unternehmensgruppe | Burghausen, Bavaria | Visit site |
| Kris-Tech Wire | Rome, New York | Visit site |
| Kronos Solar - EDPR | München, Bavaria | Visit site |
| Kudura Power East Africa Ltd | Анцух, Dagestan | Visit site |
| Kverneland Energi | Klepp Stasjon, Rogaland | Visit site |
| Kwest Group | Perrysburg, Ohio | Visit site |
| Kylemore Capital | London, England | Visit site |
| Kyma Consulting | Austin, Texas | Visit site |
| Kyocera | 京都市, Kyoto | Visit site |
| Kyoto Fusioneering | 東京都, Tokyo Prefecture | Visit site |
| Kıvanç Enerji | Tarsus, Mersin | Visit site |
| kW-Solutions | Vienna, Vienna | Visit site |
| kWatt Solutions Private Limited | Mumbai, Maharashtra | Visit site |
| kWatt Solutions Pvt Ltd | Mumbai, Maharashtra | Visit site |