XT
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XTX Topco’s Solid Biosciences SLDB Stock Holding History

XTX Topco’s Portfolio SLDB Stock Details SLDB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$551K Buy
76,485
+40,852
+115% +$262K 0.01% 1962
2025
Q4 		$201K Buy
+35,633
New +$193K 0.01% 2399
2025
Q2 		– Sell
-40,930
Closed -$151K – 3092
2025
Q1 		$151K Buy
+40,930
New +$175K 0.01% 1763
2024
Q4 		– Sell
-17,370
Closed -$121K – 2879
2024
Q3 		$121K Buy
+17,370
New +$141K 0.01% 1572
2022
Q2 		– Sell
-13,184
Closed -$237K – 1081
2022
Q1 		$237K Buy
13,184
+11,251
+582% +$199K 0.1% 357
2021
Q4 		$51K Buy
1,933
+1,006
+109% +$30.7K 0.03% 561
2021
Q3 		$33K Buy
927
+76
+9% +$3.23K 0.01% 625
2021
Q2 		$47K Buy
+851
New +$56.2K 0.02% 729

Other funds holding SLDB

PA
Perceptive Advisors New York $5.12B AUM 314.02% 1-Year Est. Return
BCLSI
Bain Capital Life Sciences Investors Boston, Massachusetts $1.11B AUM 171.34% 1-Year Est. Return
RCM
RA Capital Management Boston, Massachusetts $9.44B AUM 157.3% 1-Year Est. Return
SL
Siren LLC Greenwich, Connecticut $3.61B AUM 203.3% 1-Year Est. Return
VPC
Vestal Point Capital New York $3.58B AUM 189.12% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
DTC
Deep Track Capital Greenwich, Connecticut $6.12B AUM 144% 1-Year Est. Return
AC
Armistice Capital New York $5.62B AUM 36.06% 1-Year Est. Return

XTX Topco's SLDB Position: Q1 2026 in Review

XTX Topco increased its Solid Biosciences (SLDB) stake by 115% in Q1 2026, buying an estimated $262K and bringing the position to 76,485 shares worth $551K. The position accounts for 0.01% of the portfolio, ranked #1962.

XTX Topco first reported a position in SLDB in Q2 2021 and has held it in 8 quarters since. 150 funds tracked by Wall St. Rank hold SLDB as of Q1 2026.

  • XTX Topco held 76,485 shares of Solid Biosciences worth $551K as of Q1 2026.
  • XTX Topco bought 40,852 Solid Biosciences shares in Q1 2026, an estimated $262K.
  • Solid Biosciences made up 0.01% of XTX Topco's portfolio in Q1 2026, its #1962 holding.
  • XTX Topco first reported a position in Solid Biosciences in Q2 2021 and has held it in 8 quarters since.
  • 150 funds tracked by Wall St. Rank held Solid Biosciences as of Q1 2026.

Based on XTX Topco's 13F filing for Q1 2026, filed 15 May 2026.