Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in TAC held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BROOKFIELD ASSET MANAGEMENT INC. | 27.0M | $354.3M | +0.0% | 9.082% | 0.48% |
| 2 | ROYAL BANK OF CANADA | 25.3M | $331.5M | -3.1% | 8.527% | 0.06% |
| 3 | BANK OF MONTREAL /CAN/ | 18.1M | $237.7M | +35.9% | 6.089% | 0.09% |
| 4 | Rubric Capital Management LP | 17.8M | $232.9M | 0.0% | 5.991% | 2.85% |
| 5 | FMR LLC | 13.6M | $178.8M | -42.6% | 4.582% | 0.01% |
| 6 | MILLENNIUM MANAGEMENT LLC | 8.7M | $116.5M | -1.8% | 2.937% | 0.08% |
| 7 | BANK OF AMERICA CORP /DE/ | 8.0M | $104.2M | -27.8% | 2.681% | 0.01% |
| 8 | VANGUARD CAPITAL MANAGEMENT LLC | 7.7M | $101.8M | — | 2.608% | 0.00% |
| 9 | GOLDMAN SACHS GROUP INC | 7.5M | $98.6M | +53.7% | 2.536% | 0.01% |
| 10 | OAKTREE CAPITAL MANAGEMENT LP | 6.4M | $84.1M | 0.0% | 2.161% | 1.47% |
| 11 | AMERICAN CENTURY COMPANIES INC | 6.3M | $82.9M | +4.0% | 2.124% | 0.04% |
| 12 | MORGAN STANLEY | 5.2M | $68.7M | +49.9% | 1.767% | 0.00% |
| 13 | MACKENZIE FINANCIAL CORP | 4.7M | $61.6M | +29.6% | 1.578% | 0.07% |
| 14 | TORONTO DOMINION BANK | 4.6M | $60.6M | +76.7% | 1.554% | 0.09% |
| 15 | Arvin Capital Management LP | 4.5M | $58.8M | — | 1.512% | 16.02% |
| 16 | Value Aligned Research Advisors, LLC | 2.6M | $34.1M | — | 0.875% | 0.17% |
| 17 | VANGUARD FIDUCIARY TRUST CO | 2.4M | $31.1M | — | 0.796% | 0.01% |
| 18 | Rokos Capital Management LLP | 2.3M | $30.1M | 0.0% | 0.773% | 0.65% |
| 19 | CIBC World Markets Inc. | 2.3M | $30.0M | +45.1% | 0.769% | 0.05% |
| 20 | Man Group plc | 2.1M | $27.8M | +1.0% | 0.714% | 0.05% |
| 21 | NATIONAL BANK OF CANADA /FI/ | 2.1M | $27.3M | +47.5% | 0.704% | 0.03% |
| 22 | Artemis Investment Management LLP | 1.9M | $24.7M | +3.1% | 0.632% | 0.26% |
| 23 | UBS Group AG | 1.8M | $23.8M | -40.5% | 0.613% | 0.00% |
| 24 | CITADEL ADVISORS LLC | 1.8M | $23.6M | -24.4% | 0.608% | 0.01% |
| 25 | Yaupon Capital Management LP | 1.8M | $23.5M | +38.6% | 0.603% | 1.09% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in TAC — a direct measure of their conviction.
Filings activity in TAC during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new TAC position in Q1 2026
Institutions that fully closed their TAC position in Q1 2026
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 172 | +3.6% | 72.45% | +3.41 pp | $2.88B | +4.9% |
| Q4 2025 | 166 | +7.1% | 69.04% | 7.90 pp | $2.74B | 10% |
| Q3 2025 | 155 | 6.1% | 76.94% | +21.54 pp | $3.06B | +39% |
| Q2 2025 | 165 | +4.4% | 55.40% | +4.28 pp | $2.20B | +8.4% |
| Q1 2025 | 158 | 13% | 51.12% | 18.98 pp | $2.03B | 27% |
| Q4 2024 | 181 | +16% | 70.10% | +22.13 pp | $2.79B | +46% |
| Q3 2024 | 156 | +11% | 47.97% | 152.02 pp | $1.91B | 87% |
| Q2 2024 | 141 | — | 199.99% | — | $14.60B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying TAC stock.
Based on Q1 2026 13F filings, institutional ownership of TransAlta Corporation stands at 72.5%, held across 172 reporting institutions.
BROOKFIELD ASSET MANAGEMENT INC. is the largest reported institutional holder of TAC, with approximately 26,954,624 shares worth $0.35B as of Q1 2026.
Yes — 2 widely-followed marquee investors appear among the top 25 institutional holders of TAC, including MILLENNIUM MANAGEMENT LLC, CITADEL ADVISORS LLC.
Our composite Smart Money Score for TAC is 67 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
32 institutions opened new positions in TAC during Q1 2026, while 26 fully exited. 99 added to existing positions and 39 trimmed.
TAC institutional ownership rose by 3.41 percentage points quarter-over-quarter, with a net change of +6 holders.
The top 10 institutions account for 63.9% of all reported 13F value in TAC, and the top 25 account for 85.1%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
TransAlta Corporation (TAC) Institutional Ownership