HTTP 200 OK
Allow: GET
Content-Type: application/json
Vary: Accept
{
"count": 17229,
"next": "https://lda.senate.gov/api/v1/registrants/?format=api&ordering=-name&page=541",
"previous": "https://lda.senate.gov/api/v1/registrants/?format=api&ordering=-name&page=539",
"results": [
{
"id": 311713,
"url": "https://lda.senate.gov/api/v1/registrants/311713/?format=api",
"house_registrant_id": 37794,
"name": "CONSULTANTS COLLABORATIVE -- MATTHEW R. SIMMONS",
"description": "Federal Representation",
"address_1": "160 INDUSTRIAL STREET., SUITE 200",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "SAN MARCOS",
"state": "CA",
"state_display": "California",
"zip": "92078",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "MATTHEW SIMMONS",
"contact_telephone": "",
"dt_updated": "2022-04-06T16:08:31.184054-04:00"
},
{
"id": 301551,
"url": "https://lda.senate.gov/api/v1/registrants/301551/?format=api",
"house_registrant_id": null,
"name": "CONSULTANTS COLLABORATIVE",
"description": null,
"address_1": "160 INDUSTRIAL ST, #200",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "SAN MARCOS",
"state": "CA",
"state_display": "California",
"zip": "92078",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "",
"contact_telephone": "",
"dt_updated": "2022-01-13T14:55:33.278857-05:00"
},
{
"id": 72394,
"url": "https://lda.senate.gov/api/v1/registrants/72394/?format=api",
"house_registrant_id": 36077,
"name": "CONSULTANT MEDIATOR & NEGOTIATOR SERVICES",
"description": null,
"address_1": "PO BOX 7",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "WATERFORD",
"state": "VA",
"state_display": "Virginia",
"zip": "20197",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "",
"contact_telephone": "",
"dt_updated": "2022-01-13T14:53:53.919545-05:00"
},
{
"id": 287953,
"url": "https://lda.senate.gov/api/v1/registrants/287953/?format=api",
"house_registrant_id": 37066,
"name": "CONSTRUCTION MANAGEMENT ASSOCIATION OF AMERICA",
"description": "Professional association",
"address_1": "7926 JONES BRANCH DR. #800",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "MCLEAN",
"state": "VA",
"state_display": "Virginia",
"zip": "22102",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "JOHN J. MCKEON",
"contact_telephone": "",
"dt_updated": "2022-04-06T16:07:57.002391-04:00"
},
{
"id": 50901,
"url": "https://lda.senate.gov/api/v1/registrants/50901/?format=api",
"house_registrant_id": 34740,
"name": "CONSTRUCTION INDUSTRY ROUND TABLE",
"description": null,
"address_1": "8115 OLD DOMINION DR.+",
"address_2": "SUITE 210",
"address_3": null,
"address_4": null,
"city": "MCLEAN",
"state": "VA",
"state_display": "Virginia",
"zip": "22102",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "MR. MARK A. CASSO",
"contact_telephone": "+1 703-992-8302",
"dt_updated": "2025-06-27T09:45:55.072683-04:00"
},
{
"id": 401107297,
"url": "https://lda.senate.gov/api/v1/registrants/401107297/?format=api",
"house_registrant_id": 55921,
"name": "CONSTITUTION PARTNERS",
"description": null,
"address_1": "28389 Catalpa Point",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "Easton",
"state": "MD",
"state_display": "Maryland",
"zip": "21601",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "PATRICK FIRTH",
"contact_telephone": "+1 410-476-7386",
"dt_updated": "2026-02-25T13:01:57.778334-05:00"
},
{
"id": 295417,
"url": "https://lda.senate.gov/api/v1/registrants/295417/?format=api",
"house_registrant_id": 39266,
"name": "CONSTELLIS GROUP, INC. (FORMERLY KNOWN AS TRIPLE CANOPY, INC.)",
"description": "Providing complementary advisory, security, training and managed support services.",
"address_1": "12018 Sunrise Valley Drive",
"address_2": "Suite 140",
"address_3": null,
"address_4": null,
"city": "Reston",
"state": "VA",
"state_display": "Virginia",
"zip": "20191",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "CHRIS GLOVER",
"contact_telephone": "+1 703-673-5179",
"dt_updated": "2022-04-06T16:07:01.329808-04:00"
},
{
"id": 5233,
"url": "https://lda.senate.gov/api/v1/registrants/5233/?format=api",
"house_registrant_id": 35190,
"name": "CONSTELLATION ENERGY GROUP",
"description": null,
"address_1": "400 North Capitol Street, NW",
"address_2": "Suite 890",
"address_3": null,
"address_4": null,
"city": "WASHINGTON",
"state": "DC",
"state_display": "District of Columbia",
"zip": "20001",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "JIM CONNAUGHTON",
"contact_telephone": "+1 410-470-3011",
"dt_updated": "2022-04-06T16:04:31.087164-04:00"
},
{
"id": 401106428,
"url": "https://lda.senate.gov/api/v1/registrants/401106428/?format=api",
"house_registrant_id": 45481,
"name": "CONSTELLATION ENERGY GENERATION, LLC",
"description": null,
"address_1": "1310 Point Street",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "Baltimore",
"state": "MD",
"state_display": "Maryland",
"zip": "21231",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "DAVID C BROWN",
"contact_telephone": "+1 202-347-7500",
"dt_updated": "2026-01-29T13:33:13.506274-05:00"
},
{
"id": 401109112,
"url": "https://lda.senate.gov/api/v1/registrants/401109112/?format=api",
"house_registrant_id": 56777,
"name": "CONSTELLATION BRANDS, INC.",
"description": null,
"address_1": "50 East Broad Street",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "Rochester",
"state": "NY",
"state_display": "New York",
"zip": "14614",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "DANIEL LANG",
"contact_telephone": "+1 585-678-7700",
"dt_updated": "2026-01-26T09:43:32.386346-05:00"
},
{
"id": 400390817,
"url": "https://lda.senate.gov/api/v1/registrants/400390817/?format=api",
"house_registrant_id": null,
"name": "CONSTANTINOPLE & VALLONE CONSULTING LLC",
"description": "Government Relations",
"address_1": "233 Broadway",
"address_2": "Suite 830",
"address_3": null,
"address_4": null,
"city": "NY",
"state": "NY",
"state_display": "New York",
"zip": "10279",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "PERRY VALLONE",
"contact_telephone": "+1 212-393-6500",
"dt_updated": "2026-01-30T13:11:06.440373-05:00"
},
{
"id": 401104152,
"url": "https://lda.senate.gov/api/v1/registrants/401104152/?format=api",
"house_registrant_id": null,
"name": "CONSTANTINE STRATEGIES GROUP",
"description": null,
"address_1": "437 NEW YORK AVENUE NW",
"address_2": "UNIT 1210",
"address_3": null,
"address_4": null,
"city": "WASHINGTON",
"state": "DC",
"state_display": "District of Columbia",
"zip": "20001",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "TIM CONSTANTINE",
"contact_telephone": "+1 202-787-1911",
"dt_updated": "2022-01-13T15:00:54.232930-05:00"
},
{
"id": 295532,
"url": "https://lda.senate.gov/api/v1/registrants/295532/?format=api",
"house_registrant_id": 37468,
"name": "CONSTANTINE CANNON, LLP",
"description": "law firm",
"address_1": "1001 Pennsylvania Ave. NW, Suite 1300 N",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "Washington",
"state": "DC",
"state_display": "District of Columbia",
"zip": "20004",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "PATRICIA O'KEEFE",
"contact_telephone": "+1 202-204-3500",
"dt_updated": "2022-04-06T16:08:23.275415-04:00"
},
{
"id": 10605,
"url": "https://lda.senate.gov/api/v1/registrants/10605/?format=api",
"house_registrant_id": 31127,
"name": "CONSORTIUM OF SOCIAL SCIENCE ASSOCIATIONS (COSSA)",
"description": null,
"address_1": "1436 Duke Street",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "Alexandria",
"state": "VA",
"state_display": "Virginia",
"zip": "22314",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "WENDY NAUS",
"contact_telephone": "+1 202-842-3525",
"dt_updated": "2026-01-20T16:22:44.856869-05:00"
},
{
"id": 10582,
"url": "https://lda.senate.gov/api/v1/registrants/10582/?format=api",
"house_registrant_id": 33126,
"name": "CONSORTIUM FOR OCEAN LEADERSHIP",
"description": "NON-PROFIT ORGANIZATION REPRESENTING OCEANGRAPHIC RESEARCH AND EDUCATION INSTITUTIONS",
"address_1": "1201 NEW YORK AVENUE, NW, #420",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "WASHINGTON",
"state": "DC",
"state_display": "District of Columbia",
"zip": "20005",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "KEVIN WHEELER",
"contact_telephone": "",
"dt_updated": "2022-04-06T16:04:34.829584-04:00"
},
{
"id": 10571,
"url": "https://lda.senate.gov/api/v1/registrants/10571/?format=api",
"house_registrant_id": 31126,
"name": "CONSOLIDATED RAIL CORP",
"description": null,
"address_1": "2001 MARKET ST, TWO COMMERCE SQ",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "PHILADELPHIA",
"state": "PA",
"state_display": "Pennsylvania",
"zip": null,
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "",
"contact_telephone": "",
"dt_updated": "2022-01-13T14:47:26.611633-05:00"
},
{
"id": 10560,
"url": "https://lda.senate.gov/api/v1/registrants/10560/?format=api",
"house_registrant_id": 30844,
"name": "CONSOLIDATED NATURAL GAS CO",
"description": null,
"address_1": "1200 18TH ST NW #350",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "WASHINGTON",
"state": "DC",
"state_display": "District of Columbia",
"zip": "20036",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "",
"contact_telephone": "",
"dt_updated": "2022-01-13T14:47:26.138690-05:00"
},
{
"id": 10558,
"url": "https://lda.senate.gov/api/v1/registrants/10558/?format=api",
"house_registrant_id": 30842,
"name": "CONSOLIDATED EDISON COMPANY OF NEW YORK, INC.",
"description": null,
"address_1": "4 Irving Place",
"address_2": "Government and Community Relations",
"address_3": null,
"address_4": null,
"city": "New York",
"state": "NY",
"state_display": "New York",
"zip": "10003",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "AARON SHAPIRO",
"contact_telephone": "+1 646-965-3537",
"dt_updated": "2026-01-29T14:33:13.536889-05:00"
},
{
"id": 68057,
"url": "https://lda.senate.gov/api/v1/registrants/68057/?format=api",
"house_registrant_id": 35724,
"name": "CONSOL ENERGY, INC",
"description": null,
"address_1": "275 Technology Drive",
"address_2": "Suite 101",
"address_3": null,
"address_4": null,
"city": "Canonsburg",
"state": "PA",
"state_display": "Pennsylvania",
"zip": "15317",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "MATTHEW MACKOWIAK",
"contact_telephone": "+1 724-416-8291",
"dt_updated": "2026-01-26T13:43:32.538416-05:00"
},
{
"id": 401105566,
"url": "https://lda.senate.gov/api/v1/registrants/401105566/?format=api",
"house_registrant_id": null,
"name": "CONSILIUM CONSULTING",
"description": "Consulting/lobbying",
"address_1": "2141 E. Highland Ave",
"address_2": "Suite 105",
"address_3": null,
"address_4": null,
"city": "Phoenix",
"state": "AZ",
"state_display": "Arizona",
"zip": "85016",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "HANNAH MARSON",
"contact_telephone": "+1 480-532-0989",
"dt_updated": "2026-01-08T16:26:25.572560-05:00"
},
{
"id": 308057,
"url": "https://lda.senate.gov/api/v1/registrants/308057/?format=api",
"house_registrant_id": 38413,
"name": "CONSERVATIVE WAR VETERANS OF THE UNITED STATES",
"description": null,
"address_1": "3420 QUEEN CITY DR",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "CHARLOTTE",
"state": "NC",
"state_display": "North Carolina",
"zip": "28208",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "",
"contact_telephone": "",
"dt_updated": "2022-01-13T14:55:53.933509-05:00"
},
{
"id": 401104215,
"url": "https://lda.senate.gov/api/v1/registrants/401104215/?format=api",
"house_registrant_id": 43425,
"name": "CONSERVATION STRATEGY GROUP",
"description": null,
"address_1": "1100 11TH STREET, 5TH FLOOR",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "SACRAMENTO",
"state": "CA",
"state_display": "California",
"zip": "95814",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "CAMILLE MORGAN",
"contact_telephone": "+1 916-558-1516",
"dt_updated": "2022-01-13T15:00:58.042558-05:00"
},
{
"id": 401108964,
"url": "https://lda.senate.gov/api/v1/registrants/401108964/?format=api",
"house_registrant_id": 56702,
"name": "CONSERVATION SOLUTIONS GROUP, LLC",
"description": null,
"address_1": "8415 Alyce Place",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "Alexandria",
"state": "VA",
"state_display": "Virginia",
"zip": "22308",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "SEAN SAVILLE",
"contact_telephone": "+1 202-441-4214",
"dt_updated": "2025-03-06T11:51:30.286153-05:00"
},
{
"id": 400471327,
"url": "https://lda.senate.gov/api/v1/registrants/400471327/?format=api",
"house_registrant_id": 40973,
"name": "CONSERVATION PATHWAYS, LLC",
"description": "strategic/public policy consulting",
"address_1": "P.O. Box 625",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "San Anselmo",
"state": "CA",
"state_display": "California",
"zip": "94979",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "ALAN FRONT",
"contact_telephone": "+1 415-419-5195",
"dt_updated": "2026-03-03T10:36:44.643630-05:00"
},
{
"id": 400711130,
"url": "https://lda.senate.gov/api/v1/registrants/400711130/?format=api",
"house_registrant_id": null,
"name": "CONSERVATION INTERNATIONAL FOUNDATION",
"description": "Non-profit organization focused on environmental and conservation issues.",
"address_1": "2011 Crystal Drive",
"address_2": "Suite 600",
"address_3": null,
"address_4": null,
"city": "Arlington",
"state": "VA",
"state_display": "Virginia",
"zip": "22202",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "PASHA MAJDI",
"contact_telephone": "+1 703-851-4360",
"dt_updated": "2025-08-06T11:48:19.406113-04:00"
}
]
}