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TransAlta
TAC

162 hedge funds and large institutions have $3.05B invested in TransAlta in 2025 Q3 according to their latest regulatory filings, with 23 funds opening new positions, 61 increasing their positions, 55 reducing their positions, and 30 closing their positions.

New
Increased
Maintained
Reduced
Closed

200% more call options, than puts

Call options by funds: $40.5M | Put options by funds: $13.5M

27% more capital invested

Capital invested by funds: $2.41B → $3.05B (+$643M)

11% more repeat investments, than reductions

Existing positions increased: 61 | Existing positions reduced: 55

0% more funds holding in top 10

Funds holding in top 10: 6 → 6 (0)

0.04% less ownership

Funds ownership: 75.22% → 75.18% (-0.04%)

4% less funds holding

Funds holding: 169 → 162 (-7)

23% less first-time investments, than exits

New positions opened: 23 | Existing positions closed: 30

Holders
162
Holders Change
-7
Holders Change %
-4.14%
% of All Funds
2.13%
Holding in Top 10
6
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.08%
New
23
Increased
61
Reduced
55
Closed
30
Calls
$40.5M
Puts
$13.5M
Net Calls
+$27M
Net Calls Change
+$1.85M

Top Buyers

Rank Fund Capital Flow
1
Fidelity Investments
Fidelity Investments
Massachusetts
+$70.2M
2
ACG
Aventail Capital Group
New York
+$34.8M
3
RCMU
Rokos Capital Management (UK)
United Kingdom
+$24.5M
4
BNP Paribas Financial Markets
BNP Paribas Financial Markets
France
+$18.5M
5
UBS Group
UBS Group
Switzerland
+$17.7M

Top Sellers

Rank Fund Capital Flow
1
Goldman Sachs
Goldman Sachs
New York
-$63.4M
2
Millennium Management
Millennium Management
New York
-$62.8M
3
CIBC World Market
CIBC World Market
Ontario, Canada
-$14.1M
4
Royal Bank of Canada
Royal Bank of Canada
Ontario, Canada
-$12.2M
5
Morgan Stanley
Morgan Stanley
New York
-$9.32M
Name Holding Trade Value Shares
Change 		Change in
Stake
Royal Bank of Canada
1
Royal Bank of Canada
Ontario, Canada
$475M -$12.2M -993,545 -3%
BC
2
Brookfield Corp
Ontario, Canada
$368M +$68.2K +5,542 +0%
Fidelity Investments
3
Fidelity Investments
Massachusetts
$309M +$70.2M +5,704,253 +34%
RCMNY
4
Rubric Capital Management (New York)
New York
$218M – – –
Millennium Management
5
Millennium Management
New York
$179M -$62.8M -5,107,704 -28%
Vanguard Group
6
Vanguard Group
Pennsylvania
$150M +$3.05M +248,027 +2%
Bank of Montreal
7
Bank of Montreal
Ontario, Canada
$142M +$16.8M +1,369,830 +15%
Morgan Stanley
8
Morgan Stanley
New York
$111M -$9.32M -757,750 -9%
Bank of America
9
Bank of America
North Carolina
$98.9M -$4.24M -344,531 -5%
Goldman Sachs
10
Goldman Sachs
New York
$91.8M -$63.4M -5,152,713 -43%
OCM
11
Oaktree Capital Management
California
$87.6M +$4.06M +330,000 +5%
Mackenzie Financial
12
Mackenzie Financial
Ontario, Canada
$60.9M -$6.67M -542,393 -11%
UBS Group
13
UBS Group
Switzerland
$57.5M +$17.7M +1,442,122 +52%
ACM
14
Arvin Capital Management
Texas
$42.5M +$2.13M +173,500 +6%
American Century Companies
15
American Century Companies
Missouri
$41.1M -$616K -50,051 -2%
ACG
16
Aventail Capital Group
New York
$38.6M +$34.8M +2,829,643 New
Toronto Dominion Bank
17
Toronto Dominion Bank
Ontario, Canada
$37.9M +$5.4M +439,047 +19%
RCMU
18
Rokos Capital Management (UK)
United Kingdom
$37.7M +$24.5M +1,992,232 +259%
PCR
19
Potrero Capital Research
California
$34.4M – – –
National Bank of Canada
20
National Bank of Canada
Quebec, Canada
$21.3M +$277K +22,500 +1%
BNP Paribas Financial Markets
21
BNP Paribas Financial Markets
France
$20.5M +$18.5M +1,502,013 New
CIBC World Market
22
CIBC World Market
Ontario, Canada
$20.3M -$14.1M -1,144,118 -44%
Dimensional Fund Advisors
23
Dimensional Fund Advisors
Texas
$19.7M +$1.73M +140,444 +11%
YCM
24
Yaupon Capital Management
New York
$19M +$2.87M +233,593 +20%
AIM
25
Artemis Investment Management
United Kingdom
$18.5M +$435K +35,388 +3%
1
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TAC Hedge Fund Activity: Q3 2025 in Review

162 of the 7,621 institutional investors tracked by Wall St. Rank reported a position in TransAlta (TAC) for Q3 2025, worth a combined $3.05B — up 27% from $2.41B a quarter earlier.

Sellers outnumbered buyers: 30 funds closed out of TAC and 23 opened new positions — a net loss of 7 holders — while 55 trimmed existing stakes and 61 added.

The largest buyer was Fidelity Investments, adding an estimated $70.2M. The largest seller was Goldman Sachs, cutting an estimated $63.4M.

  • 162 institutional investors held TransAlta (TAC) as of Q3 2025, down from 169 in Q2 2025.
  • Funds reported $3.05B of TransAlta stock for Q3 2025, up 27% quarter-over-quarter.
  • 23 funds opened new TransAlta positions in Q3 2025 and 30 closed out, a net change of -7 holders.
  • The largest TransAlta buyer in Q3 2025 was Fidelity Investments, an estimated $70.2M added.
  • The largest TransAlta seller in Q3 2025 was Goldman Sachs, an estimated $63.4M sold.

Based on aggregated 13F filings for Q3 2025.