PARTICIPANT

PARTICIPANT sets out Participant ID, name and class for all participants.

PARTICIPANT is public data, so is available to all participants.

Source

PARTICIPANT updates as new participants register or existing participants change details.

Column Schema

PARTICIPANTID

Unique participant identifier

For more information, see the dedicated documentation page.

SQL Type: VARCHAR2(10) Polars Type: pl.Categorical

This column is mandatory, and a primary key.

Examples:

• ACACIRET
• ACACISGA
• ACC
• ACCELER
• ACENERGY
• ACLESGA
• ACTEW
• ACTEWAGL
• ACTEWM
• ACTEWMP

ACN

Australian Company Number; Nine Numbers XXX-XXX-XXX

SQL Type: VARCHAR2(9) Polars Type: str

This column is not mandatory.

LASTCHANGED

Last date and time record changed

For more information, see the dedicated documentation page.

SQL Type: DATE Polars Type: pl.Datetime()

This column is not mandatory.

Example: 1998/06/30 22:01:22

NAME

Full name of participant

SQL Type: VARCHAR2(80) Polars Type: str

This column is not mandatory.

Examples:

• 1st Energy Pty Ltd
• ACLE Services Pty Ltd
• ACT Civil & Administrative Tribunal
• ADZ Energy (Queensland) P/L(Administrators Appt)(Receivers & Managers Appt)
• AEMO (NDSC-North)
• AEMO (NDSC-South)
• AEMO Help Desk
• AEMO IT Web Interface
• AEMO Internal Account NECA Information Protocol
• AEMO Internal DI Participant Account 1

PARTICIPANTCLASSID

Class of participant

SQL Type: VARCHAR2(20) Polars Type: str

This column is not mandatory.

Examples:

• MARKET PARTICIPANT
• NONMARKET
• POOL PARTICIPANT
• SPECIAL PARTICIPANT

PRIMARYBUSINESS

Identifies primary business activity of participant

SQL Type: VARCHAR2(40) Polars Type: str

This column is not mandatory.

Examples:

• Auction Trader
• BANKING
• Bank
• Bank - Trader
• Banking - Reallocator
• Controller / Operator / Intermediary
• Customer
• Customer / Generator
• Data Access
• Develop Energy Software Systems

DESCRIPTION

Not used

SQL Type: VARCHAR2(64) Polars Type: str

This column is unused.

Examples:

• 2nd participant id for Attunga Capital Pty Ltd
• AEMO Interface to the WEB via Walter Muller
• Adding Mkt Customer
• Citipower
• Correcting Austraclear account
• Country Energy
• Country Energy
• DEFAULT LOCAL RETAILER FOR WHOLESALE
• DEFAULT LOCAL RETAILER FOR WHOLSALE
• Data Provider only

New Data Timing

When new participants register or existing participants details are changed

Code Examples

Polars

Casting is enums, categoricals etc is not essential, but may speed up parsing. Swapping int for pl.UInt16, pl.Int32 would also speed up parsing. However some of the datatypes are inferred, so they may be wrong.

This code deduplicates for you. Deduplication is normally only required across multiple months.

This code assumes that all columns are present, which may not be true for older files.

import polars as pl
import polars.selectors as cs

# e.g. "2029/03/15 00:05:00"
dt_s_fmt = "%Y/%m/%d %H:%M:%S"

csv_paths = ["SOMEFILE.CSV", "OTHERFILE.CSV"]

lf = (
    pl.concat(
        [
            pl.scan_csv(
                csv_path,  # must be unzipped beforehand
                skip_rows=1,  # skip the header
                infer_schema=False,  # much faster
            )
            .filter(cs.by_index(0) == "D")  # drop the footer
            .select(~cs.by_index(range(4)))  # drop metadata columns
            for csv_path in csv_paths
        ],
        how="diagonal_relaxed",
    )
    .with_columns(
        pl.col("LASTCHANGED").str.strptime(pl.Datetime, dt_s_fmt),
    )
    .cast(
        {
            "PARTICIPANTID": pl.Categorical,
            "ACN": str,
            "NAME": str,
            "PARTICIPANTCLASSID": str,
            "PRIMARYBUSINESS": str,
            "DESCRIPTION": str,
        }
    )
    # Drop deprecated/unused columns
    .drop("DESCRIPTION")
    # Deduplicate
    # We want one row per ['PARTICIPANTID']
    # Tie-breaker: greatest value of ['LASTCHANGED']
    .sort(["LASTCHANGED"], descending=False)
    .unique(subset=["PARTICIPANTID"], keep="last")
)

Nemosis

from nemosis import dynamic_data_compiler

df = dynamic_data_compiler(
    '2024/01/01 00:00:00',
    '2024/01/31 00:00:00',
    "PARTICIPANT",
    "data/"
)

Nemosis only includes a subset of columns by default, as an optimisation. (i.e. the commonly used columns.) To include others:

from nemosis import defaults

defaults.table_columns["PARTICIPANT"] += ["ACN", "PRIMARYBUSINESS", "DESCRIPTION"]
df = dynamic_data_compiler(...)

Example File

From PUBLIC_ARCHIVE_PARTICIPANT_FILE01_202609010000.zip

Table without MetadataTable with MetadataRaw Text without Metadata

PARTICIPANTID	PARTICIPANTCLASSID	NAME	DESCRIPTION	ACN	PRIMARYBUSINESS	LASTCHANGED
ETSAP	MARKET PARTICIPANT	ETSA Corporation			Market Customer - Load Non-dispatch	1998/06/30 22:01:22
OPTIMA	MARKET PARTICIPANT	OPTIMA Energy			Scheduled Market Generator	1998/06/30 22:01:22
ACTEW	SPECIAL PARTICIPANT	Actew Energy Limited				2000/01/28 09:41:57
CAPELEC	MARKET PARTICIPANT	Capricornia Electricity Corporation Ltd				1998/06/30 22:01:22
ENERGNSP	MARKET PARTICIPANT	Energex (NSP)				1998/06/30 22:01:22
ETSAPP	SPECIAL PARTICIPANT	ETSA Utilities Pty Ltd			Local Network Operator	2000/01/31 11:41:26
FNQEB	MARKET PARTICIPANT	FAR North Queensland Electricity Corporation Ltd				1998/06/30 22:01:22
KINETIK	MARKET PARTICIPANT	Kinetik Energy Pty Ltd			Market Customer - Load Non-dispatch	1999/12/20 09:40:29
MACKAY	MARKET PARTICIPANT	Mackay Electricity Corporation Ltd				1998/06/30 22:01:22
NORQEB	MARKET PARTICIPANT	North queensland Electricity Corporation Ltd				1998/06/30 22:01:22
POWERL	MARKET PARTICIPANT	Powerlink Queensland				1998/06/30 22:01:22
...

C	SETP.WORLD	DVD_PARTICIPANT	AEMO	PUBLIC	2026/10/09	16:21:27	001791526887816	MONTHLY_ARCHIVE	001791526887816
I	PARTICIPANT_REGISTRATION	PARTICIPANT	1	PARTICIPANTID	PARTICIPANTCLASSID	NAME	DESCRIPTION	ACN	PRIMARYBUSINESS	LASTCHANGED
D	PARTICIPANT_REGISTRATION	PARTICIPANT	1	ETSAP	MARKET PARTICIPANT	ETSA Corporation			Market Customer - Load Non-dispatch	1998/06/30 22:01:22
D	PARTICIPANT_REGISTRATION	PARTICIPANT	1	OPTIMA	MARKET PARTICIPANT	OPTIMA Energy			Scheduled Market Generator	1998/06/30 22:01:22
D	PARTICIPANT_REGISTRATION	PARTICIPANT	1	ACTEW	SPECIAL PARTICIPANT	Actew Energy Limited				2000/01/28 09:41:57
D	PARTICIPANT_REGISTRATION	PARTICIPANT	1	CAPELEC	MARKET PARTICIPANT	Capricornia Electricity Corporation Ltd				1998/06/30 22:01:22
D	PARTICIPANT_REGISTRATION	PARTICIPANT	1	ENERGNSP	MARKET PARTICIPANT	Energex (NSP)				1998/06/30 22:01:22
D	PARTICIPANT_REGISTRATION	PARTICIPANT	1	ETSAPP	SPECIAL PARTICIPANT	ETSA Utilities Pty Ltd			Local Network Operator	2000/01/31 11:41:26
D	PARTICIPANT_REGISTRATION	PARTICIPANT	1	FNQEB	MARKET PARTICIPANT	FAR North Queensland Electricity Corporation Ltd				1998/06/30 22:01:22
D	PARTICIPANT_REGISTRATION	PARTICIPANT	1	KINETIK	MARKET PARTICIPANT	Kinetik Energy Pty Ltd			Market Customer - Load Non-dispatch	1999/12/20 09:40:29
D	PARTICIPANT_REGISTRATION	PARTICIPANT	1	MACKAY	MARKET PARTICIPANT	Mackay Electricity Corporation Ltd				1998/06/30 22:01:22
D	PARTICIPANT_REGISTRATION	PARTICIPANT	1	NORQEB	MARKET PARTICIPANT	North queensland Electricity Corporation Ltd				1998/06/30 22:01:22
D	PARTICIPANT_REGISTRATION	PARTICIPANT	1	POWERL	MARKET PARTICIPANT	Powerlink Queensland				1998/06/30 22:01:22
...
C	END OF REPORT	1003

PARTICIPANTID,PARTICIPANTCLASSID,NAME,DESCRIPTION,ACN,PRIMARYBUSINESS,LASTCHANGED
ETSAP,"MARKET PARTICIPANT","ETSA Corporation",,,"Market Customer - Load Non-dispatch","1998/06/30 22:01:22"
OPTIMA,"MARKET PARTICIPANT","OPTIMA Energy",,,"Scheduled Market Generator","1998/06/30 22:01:22"
ACTEW,"SPECIAL PARTICIPANT","Actew Energy Limited",,,,"2000/01/28 09:41:57"
CAPELEC,"MARKET PARTICIPANT","Capricornia Electricity Corporation Ltd",,,,"1998/06/30 22:01:22"
ENERGNSP,"MARKET PARTICIPANT","Energex (NSP)",,,,"1998/06/30 22:01:22"
ETSAPP,"SPECIAL PARTICIPANT","ETSA Utilities Pty Ltd",,,"Local Network Operator","2000/01/31 11:41:26"
FNQEB,"MARKET PARTICIPANT","FAR North Queensland Electricity Corporation Ltd",,,,"1998/06/30 22:01:22"
KINETIK,"MARKET PARTICIPANT","Kinetik Energy Pty Ltd",,,"Market Customer - Load Non-dispatch","1999/12/20 09:40:29"
MACKAY,"MARKET PARTICIPANT","Mackay Electricity Corporation Ltd",,,,"1998/06/30 22:01:22"
NORQEB,"MARKET PARTICIPANT","North queensland Electricity Corporation Ltd",,,,"1998/06/30 22:01:22"
POWERL,"MARKET PARTICIPANT","Powerlink Queensland",,,,"1998/06/30 22:01:22"
...

Raw Text with Metadata

C,SETP.WORLD,DVD_PARTICIPANT,AEMO,PUBLIC,2026/10/09,16:21:27,001791526887816,MONTHLY_ARCHIVE,001791526887816
I,PARTICIPANT_REGISTRATION,PARTICIPANT,1,PARTICIPANTID,PARTICIPANTCLASSID,NAME,DESCRIPTION,ACN,PRIMARYBUSINESS,LASTCHANGED
D,PARTICIPANT_REGISTRATION,PARTICIPANT,1,ETSAP,"MARKET PARTICIPANT","ETSA Corporation",,,"Market Customer - Load Non-dispatch","1998/06/30 22:01:22"
D,PARTICIPANT_REGISTRATION,PARTICIPANT,1,OPTIMA,"MARKET PARTICIPANT","OPTIMA Energy",,,"Scheduled Market Generator","1998/06/30 22:01:22"
D,PARTICIPANT_REGISTRATION,PARTICIPANT,1,ACTEW,"SPECIAL PARTICIPANT","Actew Energy Limited",,,,"2000/01/28 09:41:57"
D,PARTICIPANT_REGISTRATION,PARTICIPANT,1,CAPELEC,"MARKET PARTICIPANT","Capricornia Electricity Corporation Ltd",,,,"1998/06/30 22:01:22"
D,PARTICIPANT_REGISTRATION,PARTICIPANT,1,ENERGNSP,"MARKET PARTICIPANT","Energex (NSP)",,,,"1998/06/30 22:01:22"
D,PARTICIPANT_REGISTRATION,PARTICIPANT,1,ETSAPP,"SPECIAL PARTICIPANT","ETSA Utilities Pty Ltd",,,"Local Network Operator","2000/01/31 11:41:26"
D,PARTICIPANT_REGISTRATION,PARTICIPANT,1,FNQEB,"MARKET PARTICIPANT","FAR North Queensland Electricity Corporation Ltd",,,,"1998/06/30 22:01:22"
D,PARTICIPANT_REGISTRATION,PARTICIPANT,1,KINETIK,"MARKET PARTICIPANT","Kinetik Energy Pty Ltd",,,"Market Customer - Load Non-dispatch","1999/12/20 09:40:29"
D,PARTICIPANT_REGISTRATION,PARTICIPANT,1,MACKAY,"MARKET PARTICIPANT","Mackay Electricity Corporation Ltd",,,,"1998/06/30 22:01:22"
D,PARTICIPANT_REGISTRATION,PARTICIPANT,1,NORQEB,"MARKET PARTICIPANT","North queensland Electricity Corporation Ltd",,,,"1998/06/30 22:01:22"
D,PARTICIPANT_REGISTRATION,PARTICIPANT,1,POWERL,"MARKET PARTICIPANT","Powerlink Queensland",,,,"1998/06/30 22:01:22"
...
C,"END OF REPORT",1003

Availability

Visibility: Public

This table is in the public monthly MMSDM archive.

I have collated the list of all those files into one place, in this CSV metadata file. (Columns year, month, url, compressed_size in bytes).

The earliest available data is month 1 of 2015. The most recent available data is month 9 of 2026.

Every month in between has a file. (No gaps.)

Data Size

Each year of data is approximately 344 KB when zipped, 3 MB as unzipped CSV.

Deduplication and PDR Loader Configuration

The primary keys are:

• PARTICIPANTID

The transaction type is "INSERT-UPDATE", which means that you will likely see duplicate data with different values.

You should deduplicate by sorting based on LASTCHANGED, within each group of primary keys.

PDR Loader configuration is:

Report Name	Report Subtype	Version
PARTICIPANT_REGISTRATION	PARTICIPANT	1

This means that the CSV files start with metadata columns:

I,PARTICIPANT_REGISTRATION,PARTICIPANT,1,...
D,PARTICIPANT_REGISTRATION,PARTICIPANT,1,...

ROW_FILTER_TYPE is LASTCHANGED

Indexes

• LASTCHANGED

Links

This page as JSON (schema documented here, but may change)

Download a JSON Schema specification for this table.

Official AEMO schema documentation

Other Information

Package: PARTICIPANT_REGISTRATION

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