WhichIndex

Which indexes is TransAlta Corporation in?

TransAlta Corporation is in 2 of the 57 indexes we track. Its largest weight is 0.10% in the S&P/TSX Composite, where it ranks #134 of 216.

Tickers
TA (Toronto Stock Exchange)
TAC (NYSE)
Country
Canada
Sector
Utilities
Size
Mid cap (market cap $2–10 billion; exact figure in the ranking)
Data as of
16 Oct 2026

Member of 2 indexes

TransAlta Corporation's index memberships
IndexWeight %RankIndex size
S&P/TSX Composite0.10134216
NYSE Composite0.01 (est.)11131865

Source: each index's own source, listed on its page. How we source this. Weights are estimates where marked. This page is refreshed when a membership changes or a weight moves by more than 10%; each index page has the daily figures.

TransAlta Corporation across every index we track

Lit tiles are the indexes TransAlta Corporation belongs to; the shade is its weight there.

Fewermore

Neighbours by weight

The members ranked just above and just below TransAlta Corporation in each index
IndexRanked aboveRanked below
S&P/TSX CompositeRussel Metals Inc. (0.10%)West Fraser Timber Co. Ltd. (0.10%)
NYSE CompositeTootsie Roll Industries, Inc. (0.01%)Transocean (0.01%)