William Blair & Company
TLN

William Blair & Company’s Talen Energy Corp TLN Stock Holding History

William Blair & Company’s Portfolio TLN Stock Details TLN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$1.18M Buy
3,078
+391
+15% +$143K ﹤0.01% 920
2026
Q1 		$858K Sell
2,687
-3,416
-56% -$1.21M ﹤0.01% 987
2025
Q4 		$2.29M Buy
6,103
+1,949
+47% +$758K 0.01% 707
2025
Q3 		$1.77M Buy
4,154
+2,933
+240% +$1.06M ﹤0.01% 760
2025
Q2 		$355K Buy
+1,221
New +$290K ﹤0.01% 1198

Other funds holding TLN

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
RCMNY
Rubric Capital Management (New York) New York $10.9B AUM 70.31% 1-Year Est. Return
MP
MFN Partners Boston, Massachusetts $4.83B AUM 65.74% 1-Year Est. Return
EC
ECP ControlCo Summit, New Jersey $4.67B AUM 13.65% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
FAM
Fred Alger Management New York $30B AUM 76.99% 1-Year Est. Return
WHRC
W.H. Reaves & Co Jersey City, New Jersey $6.59B AUM 31.9% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
SHCM
Sachem Head Capital Management New York $4.82B AUM 73.38% 1-Year Est. Return

William Blair & Company's TLN Position: Q2 2026 in Review

William Blair & Company increased its Talen Energy Corp (TLN) stake by 15% in Q2 2026, buying an estimated $143K and bringing the position to 3,078 shares worth $1.18M. The position accounts for ﹤0.01% of the portfolio, ranked #920.

William Blair & Company first reported a position in TLN in Q2 2025 and has held it in 5 quarters since. The position peaked at $2.29M in Q4 2025. 647 funds tracked by Wall St. Rank hold TLN as of Q2 2026.

  • William Blair & Company held 3,078 shares of Talen Energy Corp worth $1.18M as of Q2 2026.
  • William Blair & Company bought 391 Talen Energy Corp shares in Q2 2026, an estimated $143K.
  • Talen Energy Corp made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #920 holding.
  • William Blair & Company first reported a position in Talen Energy Corp in Q2 2025 and has held it in 5 quarters since.
  • William Blair & Company's Talen Energy Corp position peaked at $2.29M in Q4 2025.
  • 647 funds tracked by Wall St. Rank held Talen Energy Corp as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.