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
Q2 		$364K Buy
13,239
+4,085
+45% +$111K ﹤0.01% 2664
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 $1.65B AUM 166.99% 1-Year Est. Return
FCM
Farallon Capital Management San Francisco, California $21.7B AUM 79.24% 1-Year Est. Return
PBA
Paradigm Biocapital Advisors New York $5.34B AUM 380.18% 1-Year Est. Return
CC
Commodore Capital New York $1.68B AUM 375.52% 1-Year Est. Return
RCM
RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return
JT
Jupiter Topco New York $245B AUM
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
PHP
Parkman Healthcare Partners Stamford, Connecticut $977M AUM 110.37% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Point72 Asset Management
Point72 Asset Management Stamford, Connecticut $90.7B AUM 77.13% 1-Year Est. Return

American Century Companies's ASMB Position: Q2 2026 in Review

American Century Companies increased its Assembly Biosciences (ASMB) stake by 45% in Q2 2026, buying an estimated $111K and bringing the position to 13,239 shares worth $364K. The position accounts for ﹤0.01% of the portfolio, ranked #2664.

American Century Companies first reported a position in ASMB in Q1 2025 and has held it in 3 quarters since. 93 funds tracked by Wall St. Rank hold ASMB as of Q2 2026.

  • American Century Companies held 13,239 shares of Assembly Biosciences worth $364K as of Q2 2026.
  • American Century Companies bought 4,085 Assembly Biosciences shares in Q2 2026, an estimated $111K.
  • Assembly Biosciences made up ﹤0.01% of American Century Companies's portfolio in Q2 2026, its #2664 holding.
  • American Century Companies first reported a position in Assembly Biosciences in Q1 2025 and has held it in 3 quarters since.
  • 93 funds tracked by Wall St. Rank held Assembly Biosciences as of Q2 2026.

Based on American Century Companies's 13F filing for Q2 2026, filed 12 Aug 2026.