HTTP 200 OK
Allow: GET
Content-Type: application/json
Vary: Accept
{
"count": 16930,
"next": "https://lda.senate.gov/api/v1/registrants/?format=api&ordering=name&page=463",
"previous": "https://lda.senate.gov/api/v1/registrants/?format=api&ordering=name&page=461",
"results": [
{
"id": 401107315,
"url": "https://lda.senate.gov/api/v1/registrants/401107315/?format=api",
"house_registrant_id": null,
"name": "ONMESSAGE PUBLIC STRATEGIES",
"description": null,
"address_1": "817 Slaters Lane",
"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": "TOMMY BINION",
"contact_telephone": "+1 770-891-5450",
"dt_updated": "2025-07-29T16:08:51.568223-04:00"
},
{
"id": 400480365,
"url": "https://lda.senate.gov/api/v1/registrants/400480365/?format=api",
"house_registrant_id": 400480365,
"name": "ONPOINT STRATEGIES",
"description": "Government relations",
"address_1": "2384 Aronimink Circle",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "Fayetteville",
"state": "PA",
"state_display": "Pennsylvania",
"zip": "17222",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "ERIC SCHLECHT",
"contact_telephone": "+1 703-447-8545",
"dt_updated": "2022-04-06T16:07:57.030778-04:00"
},
{
"id": 401038924,
"url": "https://lda.senate.gov/api/v1/registrants/401038924/?format=api",
"house_registrant_id": 401038924,
"name": "ON THE LEVEL, INC.",
"description": "advocate for greater democracy and transparancy in U.S. government",
"address_1": "4119 Garrison St NW",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "Washington",
"state": "DC",
"state_display": "District of Columbia",
"zip": "20016",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "J. E. MCNEIL",
"contact_telephone": "+1 202-256-7441",
"dt_updated": "2022-04-06T16:07:55.758305-04:00"
},
{
"id": 47917,
"url": "https://lda.senate.gov/api/v1/registrants/47917/?format=api",
"house_registrant_id": 34456,
"name": "ONTRACKAMERICA",
"description": "501c# Railroad think tank",
"address_1": "1700 Sansom Street, Suite 500A",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "Philadelphia",
"state": "PA",
"state_display": "Pennsylvania",
"zip": "19103",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "MICHAEL SUSSMAN",
"contact_telephone": "",
"dt_updated": "2022-04-06T16:07:49.298578-04:00"
},
{
"id": 400948741,
"url": "https://lda.senate.gov/api/v1/registrants/400948741/?format=api",
"house_registrant_id": 400948741,
"name": "ONYX PHARMACEUTICALS",
"description": "Onyx Pharmaceuticals develops and commercialize innovative cancer therapies.",
"address_1": "1455 Pennsylvania Ave, NW",
"address_2": "Suite 400",
"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": "DEANNA DARLINGTON",
"contact_telephone": "+1 650-266-2408",
"dt_updated": "2022-04-06T16:07:56.119775-04:00"
},
{
"id": 30314,
"url": "https://lda.senate.gov/api/v1/registrants/30314/?format=api",
"house_registrant_id": 31954,
"name": "OPASTCO",
"description": null,
"address_1": "2020 K Street, NW",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "WASHINGTON",
"state": "DC",
"state_display": "District of Columbia",
"zip": "20006",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "MR. RANDY TYREE",
"contact_telephone": "+1 202-659-0254",
"dt_updated": "2022-04-06T16:06:51.727013-04:00"
},
{
"id": 401107987,
"url": "https://lda.senate.gov/api/v1/registrants/401107987/?format=api",
"house_registrant_id": null,
"name": "OPENAI OPCO, LLC",
"description": null,
"address_1": "1455 3rd Street",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "San Francisco",
"state": "CA",
"state_display": "California",
"zip": "94158",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "NICOLE DIAZ",
"contact_telephone": "+1 415-903-2800",
"dt_updated": "2025-07-24T15:04:53.089592-04:00"
},
{
"id": 320656,
"url": "https://lda.senate.gov/api/v1/registrants/320656/?format=api",
"house_registrant_id": 39496,
"name": "OPEN INTERNET COALITION",
"description": null,
"address_1": "400 North Capitol Street NW",
"address_2": "Suite 585",
"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": "MARKHAM C. ERICKSON",
"contact_telephone": "",
"dt_updated": "2022-04-06T16:07:47.400679-04:00"
},
{
"id": 74955,
"url": "https://lda.senate.gov/api/v1/registrants/74955/?format=api",
"house_registrant_id": 36028,
"name": "OPEN SOCIETY ACTION FUND",
"description": null,
"address_1": "1730 Pennsylvania Avenue, NW",
"address_2": "7th Floor",
"address_3": null,
"address_4": null,
"city": "Washington",
"state": "DC",
"state_display": "District of Columbia",
"zip": "20006",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "DEBBIE FINE",
"contact_telephone": "+1 202-721-5600",
"dt_updated": "2025-07-30T12:49:59.311070-04:00"
},
{
"id": 400456191,
"url": "https://lda.senate.gov/api/v1/registrants/400456191/?format=api",
"house_registrant_id": 400456191,
"name": "OPEN SPACE INSTITUTE, INC.",
"description": "Environmental land conservation",
"address_1": "1370 Broadway",
"address_2": "5th Floor",
"address_3": null,
"address_4": null,
"city": "New York",
"state": "NY",
"state_display": "New York",
"zip": "10018",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "TALLY BLUMBERG",
"contact_telephone": "+1 212-629-3981",
"dt_updated": "2025-08-05T15:48:11.224585-04:00"
},
{
"id": 30234,
"url": "https://lda.senate.gov/api/v1/registrants/30234/?format=api",
"house_registrant_id": 31952,
"name": "OPERA AMERICA",
"description": "Nonprofit arts service organization",
"address_1": "330 7th Ave",
"address_2": "7th Fl",
"address_3": null,
"address_4": null,
"city": "New York",
"state": "NY",
"state_display": "New York",
"zip": "11106",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "MEGAN CARPENTER",
"contact_telephone": "+1 646-699-5240",
"dt_updated": "2025-07-17T12:22:40.984030-04:00"
},
{
"id": 59091,
"url": "https://lda.senate.gov/api/v1/registrants/59091/?format=api",
"house_registrant_id": 35201,
"name": "OPPEL, GOLDBERG & SAENZ, P.L.L.C.",
"description": null,
"address_1": "1010 Lamar, Suite 1420",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "Houston",
"state": "TX",
"state_display": "Texas",
"zip": "77002",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "",
"contact_telephone": "",
"dt_updated": "2022-01-13T14:53:17.242158-05:00"
},
{
"id": 30245,
"url": "https://lda.senate.gov/api/v1/registrants/30245/?format=api",
"house_registrant_id": 30971,
"name": "OPPENHEIMER WOLFF & DONNELLY, LLP",
"description": "8/8/2001",
"address_1": "1620 L STREET, NW # 600",
"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": "2022-01-13T14:50:29.188726-05:00"
},
{
"id": 401104184,
"url": "https://lda.senate.gov/api/v1/registrants/401104184/?format=api",
"house_registrant_id": 401104184,
"name": "OPPORTUNITY AMERICA INC.",
"description": "nonprofit policy shop",
"address_1": "737 8th Street, SE",
"address_2": "Suite 201",
"address_3": null,
"address_4": null,
"city": "Washington",
"state": "DC",
"state_display": "District of Columbia",
"zip": "20003",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "TAMAR JACOBY",
"contact_telephone": "+1 202-506-4541",
"dt_updated": "2024-01-21T07:00:17.906786-05:00"
},
{
"id": 290013,
"url": "https://lda.senate.gov/api/v1/registrants/290013/?format=api",
"house_registrant_id": 37161,
"name": "OPPORTUNITY FINANCE NETWORK-FORMERLY NATIONAL COMMUNITY CAP",
"description": "Nonprofit trade association for CDFIs",
"address_1": "123 S Broad Street, Suite 1930",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "Philadelphia",
"state": "PA",
"state_display": "Pennsylvania",
"zip": "19109",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "LAURIE CURRAN",
"contact_telephone": "+1 215-320-4317",
"dt_updated": "2025-07-23T09:29:39.307053-04:00"
},
{
"id": 401105395,
"url": "https://lda.senate.gov/api/v1/registrants/401105395/?format=api",
"house_registrant_id": 401105395,
"name": "OPPORTUNITY FINANCIAL, LLC",
"description": "financial services",
"address_1": "130 E. Randolph St",
"address_2": "Fl 33",
"address_3": null,
"address_4": null,
"city": "Chicago",
"state": "IL",
"state_display": "Illinois",
"zip": "60601",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "JOSEPH RUBIN",
"contact_telephone": "+1 202-557-4180",
"dt_updated": "2025-07-28T16:47:40.484173-04:00"
},
{
"id": 75331,
"url": "https://lda.senate.gov/api/v1/registrants/75331/?format=api",
"house_registrant_id": null,
"name": "OPR ENTERPRISES",
"description": null,
"address_1": "1420 NEW YORK AVENUE, NW STE 1050",
"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": "",
"contact_telephone": "",
"dt_updated": "2022-01-13T14:54:08.713709-05:00"
},
{
"id": 75318,
"url": "https://lda.senate.gov/api/v1/registrants/75318/?format=api",
"house_registrant_id": null,
"name": "OPR SOLUTIONS",
"description": null,
"address_1": "900 CONNECTICUT AVE., NW STE 109",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "WASHINGTON",
"state": "DC",
"state_display": "District of Columbia",
"zip": "20016",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "",
"contact_telephone": "",
"dt_updated": "2022-01-13T14:54:02.608209-05:00"
},
{
"id": 401106085,
"url": "https://lda.senate.gov/api/v1/registrants/401106085/?format=api",
"house_registrant_id": null,
"name": "OPR TEST REGISTRANT",
"description": null,
"address_1": "50 MASS AVE",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "WASHINGTON",
"state": "DC",
"state_display": "District of Columbia",
"zip": "20002",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "ABDUL KHAN",
"contact_telephone": "+1 202-224-7063",
"dt_updated": "2022-01-13T15:01:58.414932-05:00"
},
{
"id": 287097,
"url": "https://lda.senate.gov/api/v1/registrants/287097/?format=api",
"house_registrant_id": 287097,
"name": "OPTENBERG & ASSOC",
"description": null,
"address_1": "5715 BROADWAY AVE",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "SAN ANTONIO",
"state": "TX",
"state_display": "Texas",
"zip": "78209",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "",
"contact_telephone": "",
"dt_updated": "2022-01-13T14:55:00.421068-05:00"
},
{
"id": 54778,
"url": "https://lda.senate.gov/api/v1/registrants/54778/?format=api",
"house_registrant_id": 33522,
"name": "OPTICAL SOCIETY OF AMERICA",
"description": "non profit scientific society",
"address_1": "2010 Massachusetts Avenue, NW",
"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": "DAVID LANG",
"contact_telephone": "+1 202-416-1499",
"dt_updated": "2023-07-26T09:25:16.551030-04:00"
},
{
"id": 30256,
"url": "https://lda.senate.gov/api/v1/registrants/30256/?format=api",
"house_registrant_id": 31235,
"name": "OPTICIANS ASSOCIATION OF AMERICA",
"description": null,
"address_1": "4064 Fir Hill Drive East",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "Lakeland",
"state": "TN",
"state_display": "Tennessee",
"zip": "38002",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "CHRISTOPHER M. ALLEN",
"contact_telephone": "+1 901-388-2423",
"dt_updated": "2022-04-06T16:07:06.793517-04:00"
},
{
"id": 400501472,
"url": "https://lda.senate.gov/api/v1/registrants/400501472/?format=api",
"house_registrant_id": 400501472,
"name": "OPTIM GROUP, LLC",
"description": "Government relations and public afairs",
"address_1": "894 Munoz Rivera Avenue, Suite 202",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "San Juan",
"state": "PR",
"state_display": "Puerto Rico",
"zip": "00927-4399",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "JOEL MONTALVO",
"contact_telephone": "+1 787-200-0676",
"dt_updated": "2022-04-06T16:07:13.857382-04:00"
},
{
"id": 401108639,
"url": "https://lda.senate.gov/api/v1/registrants/401108639/?format=api",
"house_registrant_id": null,
"name": "OPTIVER SERVICES US LLC",
"description": null,
"address_1": "130 E. Randolph St.",
"address_2": "Suite 800",
"address_3": null,
"address_4": null,
"city": "Chicago",
"state": "IL",
"state_display": "Illinois",
"zip": "60601",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "MATT MACKENZIE",
"contact_telephone": "+1 312-821-9500",
"dt_updated": "2025-07-18T10:31:49.966511-04:00"
},
{
"id": 296830,
"url": "https://lda.senate.gov/api/v1/registrants/296830/?format=api",
"house_registrant_id": 37528,
"name": "ORACLE CERNER (FORMERLY CERNER CORPORATION)",
"description": "Health IT",
"address_1": "2900 Rockcreek Parkway",
"address_2": null,
"address_3": null,
"address_4": null,
"city": "Kansas City",
"state": "MO",
"state_display": "Missouri",
"zip": "64117",
"country": "US",
"country_display": "United States of America",
"ppb_country": "US",
"ppb_country_display": "United States of America",
"contact_name": "PETER HENRY",
"contact_telephone": "+1 816-906-3201",
"dt_updated": "2023-07-30T12:25:16.725496-04:00"
}
]
}
