RTW Investments’s Solid Biosciences SLDB Stock Holding History

RTW Investments’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 Q2	$38.9M	Buy	+3,892,926	New	+$29.5M	0.33%	51
2019 Q4	–	Sell	-9,703	Closed	-$1.5M	–	66
2019 Q3	$1.5M	Buy	9,703 +21	+0.2%	+$2.38K	0.09%	55
2019 Q2	$835K	Buy	9,682 +226	+2%	+$24.6K	0.04%	50
2019 Q1	$1.3M	Buy	9,456 +556	+6%	+$139K	0.09%	47
2018 Q4	$3.58M	Sell	8,900 -8,588	-49%	-$4.04M	0.33%	37
2018 Q3	$12.4M	Sell	17,488 -27,563	-61%	-$17.3M	0.74%	27
2018 Q2	$22.8M	Hold	45,051	–	–	1.64%	14
2018 Q1	$4.61M	Buy	+45,051	New	+$15.2M	0.44%	30

Other funds holding SLDB

RCM

RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return

Perceptive Advisors New York $6.66B AUM 360.84% 1-Year Est. Return

BCLSI

Bain Capital Life Sciences Investors Boston, Massachusetts $1.68B AUM 126.09% 1-Year Est. Return

Siren LLC Greenwich, Connecticut $4.94B AUM 244.43% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Armistice Capital New York $8.17B AUM 68.82% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Jupiter Topco New York $245B AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

RTW Investments's SLDB Position: Q2 2026 in Review

RTW Investments opened a new position in Solid Biosciences (SLDB) in Q2 2026: 3,892,926 shares worth $38.9M. The stake represents 0.33% of the portfolio and ranks #51 among its holdings. This is a return to the name: RTW Investments previously reported a position in SLDB as recently as Q3 2019.

RTW Investments first reported a position in SLDB in Q1 2018 and has held it in 8 quarters since. 156 funds tracked by Wall St. Rank hold SLDB as of Q2 2026.

RTW Investments held 3,892,926 shares of Solid Biosciences worth $38.9M as of Q2 2026.
Solid Biosciences was a new RTW Investments position in Q2 2026.
Solid Biosciences made up 0.33% of RTW Investments's portfolio in Q2 2026, its #51 holding.
RTW Investments first reported a position in Solid Biosciences in Q1 2018 and has held it in 8 quarters since.
156 funds tracked by Wall St. Rank held Solid Biosciences as of Q2 2026.

Based on RTW Investments's 13F filing for Q2 2026, filed 14 Aug 2026.