American Century Companies
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American Century Companies’s Assembly Biosciences ASMB Stock Holding History

American Century Companies’s Portfolio ASMB Stock Details ASMB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$254K Buy
+9,154
New +$261K ﹤0.01% 2666
2025
Q2 		– Sell
-11,799
Closed -$113K – 2855
2025
Q1 		$113K Buy
+11,799
New +$154K ﹤0.01% 2819

Other funds holding ASMB

GS
Gilead Sciences Foster City, California $2.12B AUM 143.53% 1-Year Est. Return
FCM
Farallon Capital Management San Francisco, California $17.5B AUM 50.95% 1-Year Est. Return
RCM
RA Capital Management Boston, Massachusetts $9.44B AUM 157.3% 1-Year Est. Return
CC
Commodore Capital New York $1.73B AUM 298.96% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
PBA
Paradigm Biocapital Advisors New York $4.89B AUM 251.12% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
PHP
Parkman Healthcare Partners Stamford, Connecticut $970M AUM 79.46% 1-Year Est. Return
Point72 Asset Management
Point72 Asset Management Stamford, Connecticut $78.1B AUM 55.25% 1-Year Est. Return
Blackstone Inc
Blackstone Inc New York $25.6B AUM 26.83% 1-Year Est. Return

American Century Companies's ASMB Position: Q1 2026 in Review

American Century Companies opened a new position in Assembly Biosciences (ASMB) in Q1 2026: 9,154 shares worth $254K. The stake represents ﹤0.01% of the portfolio and ranks #2666 among its holdings. This is a return to the name: American Century Companies previously reported a position in ASMB as recently as Q1 2025.

American Century Companies first reported a position in ASMB in Q1 2025 and has held it in 2 quarters since. 75 funds tracked by Wall St. Rank hold ASMB as of Q1 2026.

  • American Century Companies held 9,154 shares of Assembly Biosciences worth $254K as of Q1 2026.
  • Assembly Biosciences was a new American Century Companies position in Q1 2026.
  • Assembly Biosciences made up ﹤0.01% of American Century Companies's portfolio in Q1 2026, its #2666 holding.
  • American Century Companies first reported a position in Assembly Biosciences in Q1 2025 and has held it in 2 quarters since.
  • 75 funds tracked by Wall St. Rank held Assembly Biosciences as of Q1 2026.

Based on American Century Companies's 13F filing for Q1 2026, filed 15 May 2026.