Ticker · CUSIP 89346D107

TAC

TRANSALTA CORP

Utilities·Utilities - Independent Power Producers

···Share

Holders (tracked)

Combined shares

24,175,022

Combined value

$81.47B

Last close

$12.66

Quarter

2025Q4

Price is -99.6% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$12.66+4.05 (+46.98%)H $17.66 · L $8.33 · Avg Vol 1.5M

Tracked holders · last 8 quarters

+3 vs previous quarter over the last 8.

SEC event timeline

17 events

Paul Tudor Jones (Tudor Investment) opened position2026-02-17
+404,429 shares · 2025Q4
Position
D.E. Shaw & Co. trimmed2026-02-17
−212,900 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2026-02-17
−4,639,825 shares · 2025Q4
Position
Ken Griffin (Citadel Advisors) added2026-02-17
+1,056,088 shares · 2025Q4
Position
Two Sigma Investments trimmed2026-02-17
−121,190 shares · 2025Q4
Position
Steve Cohen (Point72) opened position2026-02-17
+996,761 shares · 2025Q4
Position
Ray Dalio (Bridgewater Associates) trimmed2026-02-13
−35,194 shares · 2025Q4
Position
Renaissance Technologies added2026-02-12
+180,995 shares · 2025Q4
Position
Norges Bank (Norway SWF) opened position2026-02-10
+3,581,371 shares · 2025Q4
Position
Two Sigma Investments added2025-11-14
+93,573 shares · 2025Q3
Position
D.E. Shaw & Co. trimmed2025-11-14
−234,089 shares · 2025Q3
Position
Izzy Englander (Millennium Mgmt) trimmed2025-11-14
−5,107,704 shares · 2025Q3
Position
Wellington Management exited2025-11-14
−225,231 shares · 2025Q3
Position
Ray Dalio (Bridgewater Associates) trimmed2025-11-13
−22,469 shares · 2025Q3
Position
Howard Marks (Oaktree Capital) added2025-11-13
+330,000 shares · 2025Q3
Position
Renaissance Technologies trimmed2025-11-13
−357,400 shares · 2025Q3
Position
First Eagle Investment Management added2025-11-12
+124 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for TAC →

Follow-the-investor returns

If you'd copied each holder of TAC…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
D.E. Shaw & Co.	2016Q1	$8.25	+53.4%	$2.8M
Renaissance Technologies	2016Q1	$8.82	+43.5%	$15.3M
Steve Cohen (Point72)	2017Q2	$9.19	+37.8%	$12.6M
Paul Tudor Jones (Tudor Investment)	2020Q1	$11.33	+11.7%	$5.1M
Two Sigma Investments	2016Q1	$12.37	+2.3%	$148K
Norges Bank (Norway SWF)	2025Q4	$12.65	+0.1%	$45.3M
Ken Griffin (Citadel Advisors)	2016Q1	$12.65	+0.1%	$3.6M
Ken Griffin (Citadel Advisors)	2016Q1	$12.65	+0.1%	$3.6M
Ken Griffin (Citadel Advisors)	2016Q1	$12.65	+0.1%	$3.6M
Izzy Englander (Millennium Mgmt)	2016Q1	$12.69	-0.3%	$107.3M
Izzy Englander (Millennium Mgmt)	2016Q1	$12.69	-0.3%	$107.3M
Ray Dalio (Bridgewater Associates)	2020Q4	$13.79	-8.2%	$711K
First Eagle Investment Management	2024Q4	$14.08	-10.1%	$196K
Howard Marks (Oaktree Capital)	2025Q1	$9665.86	-99.9%	$81.2M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions3

Norges Bank (Norway SWF)
+3,581,371
$45.3M
Steve Cohen (Point72)
+996,761
$12.6M
Paul Tudor Jones (Tudor Investment)
+404,429
$5.1M

Added to2

Ken Griffin (Citadel Advisors)
+1,056,088
$13.3M
Renaissance Technologies
+180,995
$2.3M

Trimmed4

Izzy Englander (Millennium Mgmt)
−4,639,825
$58.7M
D.E. Shaw & Co.
−212,900
$2.7M
Two Sigma Investments
−121,190
$1.5M
Ray Dalio (Bridgewater Associates)
−35,194
$446K

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	11	5,015,110	$52.0M	—
2022Q2	11	4,451,154	$50.8M	—
2022Q3	11	5,916,566	$52.3M	—
2022Q4	10	7,327,154	$65.6M	-1
2023Q1	11	5,189,369	$45.4M	+1
2023Q2	11	6,248,960	$58.5M	—
2023Q3	12	7,418,622	$64.6M	+1
2023Q4	9	8,350,848	$69.5M	-3
2024Q1	9	14,234,716	$91.4M	—
2024Q2	10	13,399,970	$94.9M	+1
2024Q3	9	13,206,512	$136.9M	-1
2024Q4	11	10,264,401	$145.1M	+2
2025Q1	11	26,246,481	$52.31B	—
2025Q2	13	29,611,474	$65.77B	+2
2025Q3	11	22,694,187	$87.87B	-2
2025Q4	14	24,175,022	$81.47B	+3

Who owns TAC

14 super-investors · 2025Q4

Tracked stake

24.18M

Combined value

$81.47B

% of shares outstanding

—

shares-out unknown

Quarter action mix

New3Added4Trim5Held2

#	Manager	Shares	Value	% of book	Last action	8Q trend
1	Howard Marks Oaktree Capital	6.42M	$81.25B	1.2%	Held
2	Izzy Englander Millennium Mgmt	8.48M	$107M	0.0%	Trim−4.64M
3	Norges Bank Norway SWF	3.58M	$45M	0.0%	New+3.58M	—
4	Ken Griffin Citadel Advisors	2.03M	$26M	0.0%	Added+1.06M
5	Renaissance Technologies	1.21M	$15M	0.0%	Added+181.0K
6	Steve Cohen Point72	996.8K	$13M	0.0%	New+996.8K
7	Izzy Englander Millennium Mgmt	400.0K	$7M	0.0%	Trim−4.64M
8	Paul Tudor Jones Tudor Investment	404.4K	$5M	0.0%	New+404.4K
9	Ken Griffin Citadel Advisors	282.5K	$4M	0.0%	Added+1.06M
10	D.E. Shaw & Co.	220.2K	$3M	0.0%	Trim−212.9K
11	Ken Griffin Citadel Advisors	76.9K	$972K	0.0%	Added+1.06M
12	Ray Dalio Bridgewater Associates	56.2K	$711K	0.0%	Trim−35.2K
13	First Eagle Investment Management	15.5K	$196K	0.0%	Held
14	Two Sigma Investments	11.7K	$148K	0.0%	Trim−121.2K

Recent moves

20 transactions

TRIMIzzy Englander (Millennium Mgmt)
−4,639,825 · 2025Q4
NEWPaul Tudor Jones (Tudor Investment)
+404,429 · 2025Q4
TRIMD.E. Shaw & Co.
−212,900 · 2025Q4
ADDKen Griffin (Citadel Advisors)
+1,056,088 · 2025Q4
TRIMTwo Sigma Investments
−121,190 · 2025Q4
NEWSteve Cohen (Point72)
+996,761 · 2025Q4
TRIMRay Dalio (Bridgewater Associates)
−35,194 · 2025Q4
ADDRenaissance Technologies
+180,995 · 2025Q4
NEWNorges Bank (Norway SWF)
+3,581,371 · 2025Q4
SOLDWellington Management
−225,231 · 2025Q3
TRIMD.E. Shaw & Co.
−234,089 · 2025Q3
ADDTwo Sigma Investments
+93,573 · 2025Q3
TRIMIzzy Englander (Millennium Mgmt)
−5,107,704 · 2025Q3
TRIMRenaissance Technologies
−357,400 · 2025Q3
ADDHoward Marks (Oaktree Capital)
+330,000 · 2025Q3
TRIMRay Dalio (Bridgewater Associates)
−22,469 · 2025Q3
ADDFirst Eagle Investment Management
+124 · 2025Q3
SOLDPaul Tudor Jones (Tudor Investment)
−105,684 · 2025Q2
ADDIzzy Englander (Millennium Mgmt)
+1,760,501 · 2025Q2
TRIMTwo Sigma Investments
−267,426 · 2025Q2

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