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Companies & Events

Corporate actions

Name: Corporate actions
Creator: TW Market Data
License: https://twmarketdata.com/en/legal/licensing

Corporate actions for listed companies — dividends, capital increases, splits and other structural events, normalized into one stream across TWSE / TPEx / MOPS.

← Corporate actions overview

ReferenceSource: TWSE / TPEx / MOPS·Plan: pro·Cost: 1 credits·GET /v2/datasets/corporate-actions

Corporate actions is a Taiwan market dataset sourced from TWSE / TPEx / MOPS, served by TW Market Data as GET /v2/datasets/corporate-actions.

Overview

corporate-actions returns one row per action with a normalized action type and the key dates (record, ex, effective), merged from the official TWSE / TPEx / MOPS announcements. Each row carries its source role and lineage, so an action can be traced back to the exact upstream disclosure rather than taken on trust.

Field	Type	Description
`ticker`	string
`action_type`	string	Normalized action type (e.g. cash_dividend, capital_increase, split).
`effective_date`	string
`announcement_date`	null
`record_date`	null	Shareholder record date.
`ex_date`	string	Ex-rights / ex-dividend date.
`cash_dividend`	null
`stock_dividend`	null
`capital_reduction_ratio`	null
`source_id`	string
`quality_flag`	string
`market`	string
`split_ratio`	null
`rights_ratio`	null
`rights_price`	null
`par_value_ratio`	null
`par_value_from`	null
`par_value_to`	null

Coverage

Rows	~18,720
Window	2003-06-02 – 2026-09-07
Grade	Reference
Measured	2026-09-04from the dataset registry

Example response

A real response from this endpoint. Rows are returned under "envelope.data", and provenance is carried in the shape shown below — it is not identical across datasets, so read this page's rather than assuming another's.

{
  "api_version": "v2",
  "endpoint": "/v2/datasets/corporate-actions",
  "request_id": "req_55b6cbfee53b",
  "plan_id": "enterprise",
  "dataset": "corporate_actions",
  "query": {
    "ticker": "00929",
    "action_type": null,
    "date_from": null,
    "date_to": "2026-08-06",
    "limit": 50
  },
  "meta": {
    "rows_returned": 37,
    "mandatory_contract_fields_present": [
      "api_version",
      "data",
      "data_as_of"
    ],
    "plan": "enterprise",
    "row_limit": 100000,
    "is_limited": false
  },
  "envelope": {
    "api_version": "v2",
    "dataset": "corporate_actions",
    "dataset_version": "v2.0.0-preview",
    "release_version": "v2.2026-08-06.preview",
    "release_date": "2026-08-06",
    "data_as_of": "2026-08-06",
    "request_context": {
      "ticker": "00929",
      "as_of_date": "2026-08-06",
      "family": "market_structure_corporate_actions",
      "field_group_type": "canonical",
      "dataset_view": "market_corporate_actions_aggregate_v1"
    },
    "data": [
      {
        "ticker": "00929",
        "action_type": "ex_dividend",
        "effective_date": "2026-07-21",
        "announcement_date": null,
        "record_date": null,
        "ex_date": "2026-07-21",
        "cash_dividend": null,
        "stock_dividend": null,
        "capital_reduction_ratio": null,
        "source_id": "00929,20260721",
        "quality_flag": "ok",
        "market": "TWSE",
        "provider": "twse_official",
        "source_role": "historical_ex_right_ex_dividend_reference_price",
        "lineage": {
          "row_index": 301,
          "detail_ref": "00929,20260721",
          "endpoint_name": "TWT49U",
          "payload_status": "OK",
          "request_end_date": "20260731",
          "request_start_date": "20260701"
        },
        "split_ratio": null,
        "rights_ratio": null,
        "rights_price": null,
        "par_value_ratio": null,
        "par_value_from": null,
        "par_value_to": null
      },
      {
        "ticker": "00929",
        "action_type": "ex_dividend",
        "effective_date": "2026-06-17",
        "announcement_date": null,
        "record_date": null,
        "ex_date": "2026-06-17",
        "cash_dividend": null,
        "stock_dividend": null,
        "capital_reduction_ratio": null,
        "source_id": "00929,20260617",
        "quality_flag": "ok",
        "market": "TWSE",
        "provider": "twse_official",
        "source_role": "historical_ex_right_ex_dividend_reference_price",
        "lineage": {
          "row_index": 114,
          "detail_ref": "00929,20260617",
          "endpoint_name": "TWT49U",
          "payload_status": "OK",
          "request_end_date": "20260930",
          "request_start_date": "20260601"
        },
        "split_ratio": null,
        "rights_ratio": null,
        "rights_price": null,
        "par_value_ratio": null,
        "par_value_from": null,
        "par_value_to": null
      }
    ],
    "quality": {
      "freshness_state": "fresh",
      "freshness_as_of": "2026-08-06",
      "completeness_ratio": 1,
      "quality_status": "ready"
    },
    "lineage": {
      "source_role": "canonical",
      "selected_source": "twse_official",
      "fallback_chain": [
        "tpex_official",
        "data_gov_mirror"
      ],
      "policy_notes": [
        "official/public-first canonical",
        "market-structure canonical aggregate first",
        "no Yahoo canonical dependency"
      ]
    },
    "error": {
      "error_code": null,
      "error_message": null,
      "dataset": "corporate_actions",
      "request_id": "read-api-e351b108c8e7",
      "blocking_gate": null
    }
  }
}

Captured from the live API on 2026-07-20.

Provenance

These columns are returned alongside the data and record where the row came from. They are provenance, not the dataset's subject matter, so they are listed here rather than in the field table.

providersource_rolelineage

Licence and attribution

Part of the data in this service is obtained from the Government Open Data Platform (data.gov.tw) and used under the Open Government Data License, version 1.0. Providing agencies: Taiwan Stock Exchange, Taipei Exchange, Taiwan Futures Exchange, Taiwan Depository & Clearing Corporation, National Development Council, Central Bank of the Republic of China (Taiwan), Department of Statistics of the Ministry of Economic Affairs, and Customs Administration of the Ministry of Finance. The value-added processing, derived calculations and presentation in this service are the responsibility of TWMD and are not associated with the providing agencies.

Cite this dataset

TW Market Data. (n.d.). Corporate actions [Data set]. TW Market Data. Retrieved 2026-09-05, from https://twmarketdata.com/en/docs/api/companies-events/corporate-actions

The version is the dataset's own as_of, not the date this page was built. Where we have no as_of the field is left out rather than filled in. Check a signature

Datasets that join with this one. The key each pair aligns on is shown, so you can plan a multi-table query without guessing.

Attention & disposition events
Joins on market + ticker
Capital Formation Events
Joins on market + ticker
Company news
Joins on market + ticker
GHG Carbon Disclosure (Scope 1/2/3)
Joins on market + ticker
Investor conference calendar
Joins on market + ticker

Getting started

Put your key in the X-API-Key header.
Add query parameters (symbol, date range, limit).
Send the request and read the envelope.data array.

curl "https://api.twmarketdata.com/v2/datasets/corporate-actions?ticker=00929" \
  -H "X-API-Key: sk_live_..."

Filtering

Parameter	Required	Type	Description
`symbol`	Yes	string	Ticker, e.g. 2330.
`start_date`	No	string (YYYY-MM-DD)	Start of the query range.
`end_date`	No	string (YYYY-MM-DD)	End of the query range.
`limit`	No	integer	Maximum rows to return.

Python

import requests

resp = requests.get(
    "https://api.twmarketdata.com/v2/datasets/corporate-actions",
    params={"ticker": "00929"},
    headers={"X-API-Key": "sk_live_..."},
)
resp.raise_for_status()
print(resp.json()["envelope"]["data"])

OpenAPI

This endpoint is GET /v2/datasets/corporate-actions. The full machine-readable schema (parameters, security, response envelope) lives in the OpenAPI spec.

Notes & limitations

Actions are point-in-time sensitive: a proposed action is only final once approved and its ex/record dates are set — pass as_of when backtesting so unapproved actions do not leak into a past date.

Request & Response

Request

curl "https://api.twmarketdata.com/v2/datasets/corporate-actions?symbol=2330&start_date=2026-01-01&end_date=2026-06-30&limit=5" \
  -H "X-API-Key: $TWMD_API_KEY"

Response

{
  "api_version": "v2",
  "endpoint": "/v2/datasets/corporate-actions",
  "request_id": "req_55b6cbfee53b",
  "plan_id": "enterprise",
  "dataset": "corporate_actions",
  "query": {
    "ticker": "<string>",
    "action_type": "<null>",
    "date_from": "<null>",
    "date_to": "<string>",
    "limit": "<number>"
  },
  "meta": {
    "rows_returned": "<number>",
    "mandatory_contract_fields_present": "<array>",
    "plan": "<string>",
    "row_limit": "<number>",
    "is_limited": "<boolean>"
  },
  "envelope": {
    "api_version": "<string>",
    "dataset": "<string>",
    "dataset_version": "<string>",
    "release_version": "<string>",
    "release_date": "<string>",
    "data_as_of": "<string>",
    "request_context": {
      "ticker": "<string>",
      "as_of_date": "<string>",
      "family": "<string>",
      "field_group_type": "<string>",
      "dataset_view": "<string>"
    },
    "data": "<array>",
    "quality": {
      "freshness_state": "<string>",
      "freshness_as_of": "<string>",
      "completeness_ratio": "<number>",
      "quality_status": "<string>"
    },
    "lineage": {
      "source_role": "<string>",
      "selected_source": "<string>",
      "fallback_chain": "<array>",
      "policy_notes": "<array>"
    },
    "error": {
      "error_code": "<null>",
      "error_message": "<null>",
      "dataset": "<string>",
      "request_id": "<string>",
      "blocking_gate": "<null>"
    }
  }
}