{
 "about": "One profile of the Alleviate Index: a US public charity as IRS public records show it.",
 "url": "https://index.alleviate.org/org/connecticut-historical-society-066026012",
 "source": {
  "name": "IRS public records",
  "as_of": "2026-10-13",
  "files": {
   "master_file": {
    "posted": "2026-10-13"
   },
   "filing_index": {
    "posted": "2026-09-16"
   },
   "pub78": {
    "posted": "2026-10-13"
   },
   "revocations": {
    "posted": "2026-10-13"
   }
  }
 },
 "method": "https://index.alleviate.org/method",
 "organization": {
  "ein": "066026012",
  "name": "Connecticut Historical Society",
  "city": "Hartford",
  "state": "CT",
  "name_irs": "CONNECTICUT HISTORICAL SOCIETY",
  "status": "exempt_current",
  "irs": {
   "foundation_code": "15",
   "ruling_month": "1934-10",
   "deductibility_code": "1",
   "status_code": "01",
   "filing_req_code": "01",
   "affiliation_code": "3",
   "organization_code": "1",
   "group_exemption": false
  },
  "focus": {
   "ntee": "A80",
   "group": "A",
   "label": "Historical organizations",
   "group_label": "Arts and culture"
  },
  "fiscal_year_end_month": 12,
  "latest_return": {
   "period": "2025-12",
   "fy": 2025,
   "revenue": 6635191,
   "assets": 71841017,
   "income": 14246432,
   "revenue_band": "gt_5m"
  },
  "required_form": {
   "form": "990",
   "basis": "receipts"
  },
  "clock": {
   "basis": "latest_return",
   "through": {
    "period": "2025-12",
    "source": "master_file"
   },
   "returns": [
    {
     "fy": 2026,
     "fy_end": "2026-12",
     "due": "2027-05-17",
     "due_moved": {
      "from": "2027-05-15",
      "weekday": "saturday",
      "holiday": null
     },
     "extended": "2027-11-15",
     "extended_moved": null
    }
   ],
   "revocation": {
    "state": "none",
    "years_not_on_file": 0
   }
  },
  "peers": {
   "group": "CT:A:gt_5m",
   "level": "state",
   "size_class": "gt_5m",
   "position": "ranked",
   "percentile": 34,
   "assets_weeks": 563,
   "age": "older"
  },
  "filings": [
   {
    "period": "2024-12",
    "fy": 2024,
    "form": "990",
    "record_date": "2025-09-30",
    "due": "2025-05-15",
    "extended": "2025-11-17",
    "timing": "after_due_in_window",
    "object_id": "202502739349301135",
    "versions": 1,
    "later_version": null
   },
   {
    "period": "2023-12",
    "fy": 2023,
    "form": "990",
    "record_date": "2024-07-10",
    "due": "2024-05-15",
    "extended": "2024-11-15",
    "timing": "after_due_in_window",
    "object_id": "202411929349300631",
    "versions": 1,
    "later_version": null
   },
   {
    "period": "2022-12",
    "fy": 2022,
    "form": "990",
    "record_date": "2023-08-15",
    "due": "2023-05-15",
    "extended": "2023-11-15",
    "timing": "after_due_in_window",
    "object_id": "202302279349302325",
    "versions": 1,
    "later_version": null
   },
   {
    "period": "2021-12",
    "fy": 2021,
    "form": "990",
    "record_date": "2022-08-05",
    "due": "2022-05-16",
    "extended": "2022-11-15",
    "timing": "after_due_in_window",
    "object_id": "202212179349300706",
    "versions": 1,
    "later_version": null
   }
  ],
  "status_check": {
   "pub78": {
    "listed": true,
    "codes": [
     "PC"
    ]
   },
   "revocation": {
    "listed": false
   }
  },
  "presence": "on_file"
 },
 "peer_group": {
  "key": "CT:A:gt_5m",
  "level": "state",
  "size_class": "gt_5m",
  "n": 28,
  "revenue": {
   "p10": 5408822,
   "p25": 5990783,
   "p50": 8593086,
   "p75": 13698898,
   "p90": 21941905,
   "min": 5052629,
   "max": 36892748
  },
  "ruling_year": {
   "p25": 1952,
   "p50": 1978,
   "p75": 1998
  },
  "assets_weeks": {
   "p25": 103.4,
   "p50": 136.4,
   "p75": 180.7
  }
 },
 "state_rule": {
  "registration": "required",
  "agency": "Public Charities Unit, Connecticut Department of Consumer Protection",
  "url": "https://portal.ct.gov/dcp/charities",
  "renewal": {
   "cadence": "annual",
   "kind": "renewal",
   "basis": "fiscal_year_end",
   "month": 11,
   "day": null,
   "days": null
  },
  "extension": null,
  "confidence": "high"
 },
 "claimed": null
}