{
  "api": "assay-systems/v1",
  "key_tier": "none",
  "retrieved": "2026-10-18T12:15:07Z",
  "source": "Assay Systems register, https://assay-systems.com/register/",
  "access_notice": "On 15 November 2026, automated access to assay-systems.com closes. After that date, access is available only under a paid annual subscription contract. Contact: contact@assay-systems.com",
  "data": {
    "id": "ASY-DE-0NJH60Q021",
    "type": "page",
    "country": "de",
    "name": "Rhomberg Sersa Bahntechnik GmbH: public contracts won without a rival in Germany",
    "url": "https://assay-systems.com/register/de/uncontested/s/rhomberg-sersa-bahntechnik-gmbh/",
    "figures": [
      {
        "label": "uncontested awards",
        "value": 8,
        "unit": "count"
      },
      {
        "label": "of its awards",
        "value": 33,
        "unit": "percent",
        "display": "33%"
      },
      {
        "label": "without a competition",
        "value": 4,
        "unit": "count"
      },
      {
        "label": "single bid",
        "value": 4,
        "unit": "count"
      }
    ],
    "text": [
      "Rhomberg Sersa Bahntechnik GmbH won 8 of its 24 public contract awards in Germany without a rival from 2023-11-09 to 2026-08-12: 4 without a competition and 4 after a competition that drew a single bid. 3 buyers awarded it without a rival, the largest DB InfraGO AG – Geschäftsbereich Fahrweg (Bukr 16) with 5."
    ],
    "tables": [
      [
        {},
        {
          "Date": "2026-06-30",
          "Buyer": "DB InfraGO AG – Geschäftsbereich Fahrweg (Bukr 16) 446729-2026",
          "Buyer link": "https://assay-systems.com/register/de/uncontested/b/db-infrago-ag-geschaftsbereich-fahrweg-bukr-16/",
          "How": "No competition neg-wo-call",
          "Stated reason": "not-wss"
        },
        {
          "Date": "2025-09-09",
          "Buyer": "DB InfraGO AG – Geschäftsbereich Fahrweg (Bukr 16) 586516-2025",
          "Buyer link": "https://assay-systems.com/register/de/uncontested/b/db-infrago-ag-geschaftsbereich-fahrweg-bukr-16/",
          "How": "No competition neg-wo-call",
          "Stated reason": "int-rules"
        },
        {
          "Date": "2025-07-11",
          "Buyer": "DB InfraGO AG – Geschäftsbereich Fahrweg (Bukr 16) 454337-2025",
          "Buyer link": "https://assay-systems.com/register/de/uncontested/b/db-infrago-ag-geschaftsbereich-fahrweg-bukr-16/",
          "How": "No competition neg-wo-call",
          "Stated reason": "not-wss"
        },
        {
          "Date": "2025-06-11",
          "Buyer": "DB InfraGO AG – Geschäftsbereich Fahrweg (Bukr 16) 376953-2025",
          "Buyer link": "https://assay-systems.com/register/de/uncontested/b/db-infrago-ag-geschaftsbereich-fahrweg-bukr-16/",
          "How": "No competition neg-wo-call",
          "Stated reason": "unsuitable"
        },
        {
          "Date": "2025-06-05",
          "Buyer": "Stadtwerke München GmbH 363798-2025",
          "Buyer link": "https://assay-systems.com/register/de/uncontested/b/stadtwerke-munchen-gmbh/",
          "How": "Single bid open",
          "Stated reason": "—"
        },
        {
          "Date": "2025-02-27",
          "Buyer": "Stadtwerke München GmbH 132400-2025",
          "Buyer link": "https://assay-systems.com/register/de/uncontested/b/stadtwerke-munchen-gmbh/",
          "How": "Single bid open",
          "Stated reason": "—"
        }
      ]
    ],
    "records": [
      {
        "name": "all of Germany",
        "url": "https://assay-systems.com/register/de/uncontested/"
      },
      {
        "name": "record in the register",
        "url": "https://assay-systems.com/register/de/rhomberg-sersa-bahntechnik-gmbh/"
      },
      {
        "name": "DB InfraGO AG – Geschäftsbereich Fahrweg (Bukr 16)",
        "url": "https://assay-systems.com/register/de/uncontested/b/db-infrago-ag-geschaftsbereich-fahrweg-bukr-16/"
      },
      {
        "name": "Stadtwerke München GmbH",
        "url": "https://assay-systems.com/register/de/uncontested/b/stadtwerke-munchen-gmbh/"
      },
      {
        "name": "DB Netz AG (Bukr 16)",
        "url": "https://assay-systems.com/register/de/uncontested/b/db-netz-ag-bukr-16/"
      },
      {
        "name": "All countries",
        "url": "https://assay-systems.com/register/uncontested/"
      }
    ],
    "assay_record": "ASY-DE-0NJH60Q021",
    "cite_as": "Assay Systems, \"Rhomberg Sersa Bahntechnik GmbH: public contracts won without a rival in Germany\", https://assay-systems.com/register/de/uncontested/s/rhomberg-sersa-bahntechnik-gmbh/"
  }
}