In the event that a company goes private, there will be one transactions.create event and one positions.updated event.

Transaction Created

The transaction created event is going to be the exchange of cash for shares held in the company going private

{
    "id": "event_21b70415-e1bf-4df6-9e2b-a420647c93fd",
    "type": "transactions.created",
    "timestamp": "2019-08-02T07:02:31.963891677Z",
    "payload": {
        "accountID": "0dd1b08f-3668-440a-be18-131443d85a47.1551208006668",
        "accountNo": "DWUV000073",
        "userID": "0dd1b08f-3668-440a-be18-131443d85a47",
        "transaction": {
            "accountAmount": 872.6003454,
            "accountBalance": 4488.8,
            "comment": "Exchanged 2.07761987 shares of TSLA for cash (merger/acquisition)",
            "finTranID": "GH.356c7d5e-8671-42ed-8387-762960dc032e",
            "wlpFinTranTypeID": "b9d3f58c-da1a-47de-af78-fe59401f396b",
            "finTranTypeID": "MERGER_ACQUISITION",
            "feeSec": 0,
            "feeTaf": 0,
            "feeBase": 0,
            "feeXtraShares": 0,
            "feeExchange": 0,
            "positionDelta": -2.07761987,
            "instrument": {
                "id": "5b85fabb-d57c-44e6-a7f6-a3efc760226c",
                "symbol": "TSLA",
                "name": "Tesla Motors, Inc."
            },
            "mergerAcquisition": {
                "type": "EXCHANGE_STOCK_CASH",
                "acquirer": {
                    "id": "5b85fabb-d57c-44e6-a7f6-a3efc760226c",
                    "symbol": "TSLA",
                    "name": "Tesla Motors, Inc."
                },
                "acquiree": {
                    "id": "5b85fabb-d57c-44e6-a7f6-a3efc760226c",
                    "symbol": "TSLA",
                    "name": "Tesla Motors, Inc."
                }
            }
        }
    }
}

Position Updated

The position update event will be made for the removal of shares that were previously held in the security

{
    "id": "event_5d5a4a88-fc05-4d53-b0bf-27801ef028c9",
    "type": "positions.updated",
    "timestamp": "2019-08-02T07:02:31.949597191Z",
    "payload": {
        "accountID": "0dd1b08f-3668-440a-be18-131443d85a47.1551208006668",
        "accountNo": "DWUV000073",
        "userID": "0dd1b08f-3668-440a-be18-131443d85a47",
        "updateReason": "MERGER_AND_ACQUISITION",
        "previous": {
            "costBasis": 500,
            "openQty": 2.07761987,
            "symbol": "TSLA",
            "avgPrice": 240.66
        },
        "current": {
            "costBasis": 0,
            "openQty": 0,
            "symbol": "TSLA"
        }
    }
}