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
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 $5.72T AUM 30.48% 1-Year Est. Return
RCMNY
Rubric Capital Management (New York) New York $9.44B AUM 68.42% 1-Year Est. Return
MP
MFN Partners Boston, Massachusetts $4.77B AUM 72.29% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
LPC
Lone Pine Capital Greenwich, Connecticut $12.5B AUM 54.4% 1-Year Est. Return
SHCM
Sachem Head Capital Management New York $4.15B AUM 48.05% 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 $2.9T AUM 29.55% 1-Year Est. Return
FAM
Fred Alger Management New York $22.8B AUM 64.63% 1-Year Est. Return

William Blair & Company's TLN Position: Q1 2026 in Review

William Blair & Company reduced its Talen Energy Corp (TLN) stake by 56% in Q1 2026, selling an estimated $1.21M and leaving 2,687 shares worth $858K. The position accounts for ﹤0.01% of the portfolio, ranked #987.

William Blair & Company first reported a position in TLN in Q2 2025 and has held it in 4 quarters since. The position peaked at $2.29M in Q4 2025. 578 funds tracked by Wall St. Rank hold TLN as of Q1 2026.

  • William Blair & Company held 2,687 shares of Talen Energy Corp worth $858K as of Q1 2026.
  • William Blair & Company sold 3,416 Talen Energy Corp shares in Q1 2026, an estimated $1.21M.
  • Talen Energy Corp made up ﹤0.01% of William Blair & Company's portfolio in Q1 2026, its #987 holding.
  • William Blair & Company first reported a position in Talen Energy Corp in Q2 2025 and has held it in 4 quarters since.
  • William Blair & Company's Talen Energy Corp position peaked at $2.29M in Q4 2025.
  • 578 funds tracked by Wall St. Rank held Talen Energy Corp as of Q1 2026.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.