{
  "object": "field_mark",
  "field_ref": "ai-ipo-first",
  "canonical_field_id": "field:1841954a2c1cd9df3bb9043420d6d3d3",
  "node_ref": null,
  "title": "AI: Which Lab Confirms an IPO First",
  "leg_structure": "Partition",
  "layer": "A",
  "mutable": false,
  "citable": true,
  "as_of": "2026-06-29T23:00:00Z",
  "canonical_date": "2026-06-29",
  "canonical_hour_utc": "23:00",
  "source_uri": "s3://netmon-prod-991599642143-us-west-1-an/public/metrics/fields/ai-ipo-first/archive/2026-06-29.json",
  "sha256": "a488146c405b228f53ec2214419701af7d49c82886f9d6716be42d423b682e57",
  "schema_version": "1",
  "methodology_version": "opc_partition_v1",
  "field_registry_version": "fields-v1",
  "entity_registry_version": "phase0-growth-2026-06-01",
  "resolution": "first lab to confirm an IPO before Jan 1, 2040 (per each leg's rules_primary)",
  "venue": {
    "name": "kalshi",
    "kalshi_series": "KXOAIANTH",
    "capital_unit": "open_interest_contracts"
  },
  "created_time": "2025-08-06T22:58:15.748721Z",
  "self": "/api/public/fields/ai-ipo-first/marks/2026-06-29",
  "archive": "/api/public/fields/ai-ipo-first/archive",
  "leg_count": 2,
  "legs": [
    {
      "canonical_leg_id": "anthropic-ipo-first",
      "node_ref": "anthropic",
      "label": "Anthropic",
      "yes_price": 0.83,
      "oi_contracts": 42030.26,
      "opc_usd": 42030,
      "kalshi_oi_share_pct": 51.58,
      "poly_liquidity_share_pct": null,
      "binding": {
        "canonical_field_id": "field:1841954a2c1cd9df3bb9043420d6d3d3",
        "venue": "kalshi",
        "venue_market_id": "KXOAIANTH-40-ANTH",
        "as_of": "2026-06-29T23:00:00Z",
        "field_registry_version": "fields-v1",
        "entity_registry_version": "phase0-growth-2026-06-01",
        "binding_sha256": "8602e35fb3121a1475c59e8f0e4512b40c8c4e1f03d3f907034866e0a7e87a5e"
      }
    },
    {
      "canonical_leg_id": "openai-ipo-first",
      "node_ref": "openai",
      "label": "OpenAI",
      "yes_price": 0.15,
      "oi_contracts": 39449.03,
      "opc_usd": 39449,
      "kalshi_oi_share_pct": 48.42,
      "poly_liquidity_share_pct": null,
      "binding": {
        "canonical_field_id": "field:1841954a2c1cd9df3bb9043420d6d3d3",
        "venue": "kalshi",
        "venue_market_id": "KXOAIANTH-40-OAI",
        "as_of": "2026-06-29T23:00:00Z",
        "field_registry_version": "fields-v1",
        "entity_registry_version": "phase0-growth-2026-06-01",
        "binding_sha256": "566a28d9ceef1fd43cdb9c23ecc8d19353cbab806232b0893836257c5e791f65"
      }
    }
  ],
  "leader": {
    "label": "Anthropic",
    "canonical_leg_id": "anthropic-ipo-first",
    "leader_probability": 0.83,
    "leader_capital_share_pct": 51.58
  },
  "event_total": 81479,
  "event_total_basis": "floor(sum raw open_interest) x $1 collateral (gross_locked_v1)",
  "overround": 0.98,
  "concentration_hhi": 0.500502,
  "relation": "exclusive",
  "roster_version": {
    "version_seq": 1,
    "relation": "exclusive",
    "member_set": [
      "anthropic-ipo-first",
      "openai-ipo-first"
    ],
    "rule_hash": "379bfe5d8a28edc01338ebc6a2924d4b5abf5d6bdd1a4f6c8e3af069d034ddbd",
    "effective_from": "2026-06-29T23:00:00Z"
  },
  "complement": {
    "label": "Neither by 2040",
    "probability": 0.02,
    "projection_only": true,
    "note": "derived complement (1 - sum venue legs); non-settling; never a Member"
  }
}