William Blair & Company
RCKT icon

William Blair & Company’s Rocket Pharmaceuticals RCKT Stock Holding History

William Blair & Company’s Portfolio RCKT Stock Details RCKT Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q3 		– Sell
-104,211
Closed -$255K – 1893
2025
Q2 		$255K Sell
104,211
-7,264
-7% -$36.8K ﹤0.01% 1321
2025
Q1 		$744K Sell
111,475
-4,563
-4% -$45.1K ﹤0.01% 966
2024
Q4 		$1.46M Sell
116,038
-18,931
-14% -$285K ﹤0.01% 790
2024
Q3 		$2.49M Sell
134,969
-7,745
-5% -$159K 0.01% 651
2024
Q2 		$3.07M Sell
142,714
-4,566
-3% -$105K 0.01% 590
2024
Q1 		$3.97M Buy
147,280
+401
+0.3% +$11.4K 0.01% 524
2023
Q4 		$4.4M Sell
146,879
-2,910
-2% -$64.2K 0.02% 485
2023
Q3 		$3.07M Buy
+149,789
New +$2.72M 0.01% 552
2022
Q4 		– Sell
-11,431
Closed -$182K – 1869
2022
Q3 		$182K Sell
11,431
-1,300
-10% -$20.3K ﹤0.01% 1402
2022
Q2 		$175K Buy
12,731
+180
+1% +$2.15K ﹤0.01% 1455
2022
Q1 		$199K Buy
12,551
+400
+3% +$6.91K ﹤0.01% 1516
2021
Q4 		$265K Sell
12,151
-100
-0.8% -$2.73K ﹤0.01% 1467
2021
Q3 		$366K Sell
12,251
-350
-3% -$12.7K ﹤0.01% 1276
2021
Q2 		$558K Sell
12,601
-1,905
-13% -$82.7K ﹤0.01% 1115
2021
Q1 		$644K Sell
14,506
-4,060
-22% -$223K ﹤0.01% 1046
2020
Q4 		$1.02M Sell
18,566
-20,438
-52% -$745K ﹤0.01% 844
2020
Q3 		$892K Buy
39,004
+221
+0.6% +$5.45K ﹤0.01% 787
2020
Q2 		$812K Buy
38,783
+3,791
+11% +$68.3K ﹤0.01% 782
2020
Q1 		$488K Sell
34,992
-51,965
-60% -$1.03M ﹤0.01% 876
2019
Q4 		$1.98M Buy
+86,957
New +$1.45M 0.01% 608

Other funds holding RCKT

RI
RTW Investments New York $11.7B AUM 174.13% 1-Year Est. Return
MC
Maverick Capital Dallas, Texas $11.3B AUM 76.6% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
MB
MPM BioImpact Boston, Massachusetts $1.64B AUM 245.64% 1-Year Est. Return
SCM
Suvretta Capital Management New York $5.47B AUM 131.34% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
MAM
Monaco Asset Management Monaco $1.26B AUM 60.23% 1-Year Est. Return
NM
Newtyn Management New York $801M AUM 23.14% 1-Year Est. Return

William Blair & Company's RCKT Position: Q3 2025 in Review

William Blair & Company sold out of Rocket Pharmaceuticals (RCKT) in Q3 2025, closing a stake of 104,211 shares — an estimated $255K sold.

William Blair & Company first reported a position in RCKT in Q4 2019 and held it in 20 quarters. The position peaked at $4.4M in Q4 2023. 173 funds tracked by Wall St. Rank hold RCKT as of Q3 2025.

  • William Blair & Company reported no remaining Rocket Pharmaceuticals position as of Q3 2025 after selling out during the quarter.
  • William Blair & Company sold 104,211 Rocket Pharmaceuticals shares in Q3 2025, an estimated $255K.
  • William Blair & Company first reported a position in Rocket Pharmaceuticals in Q4 2019 and held it in 20 quarters.
  • William Blair & Company's Rocket Pharmaceuticals position peaked at $4.4M in Q4 2023.
  • 173 funds tracked by Wall St. Rank held Rocket Pharmaceuticals as of Q3 2025.

Based on William Blair & Company's 13F filing for Q3 2025, filed 12 Nov 2025.