American Century Companies’s Spero Therapeutics SPRO Stock Holding History
Bought
Maintained
Sold
Other funds holding SPRO
GP
P
VCM
AI
VFT
GCP
American Century Companies's SPRO Position: Q2 2026 in Review
American Century Companies opened a new position in Spero Therapeutics (SPRO) in Q2 2026: 36,811 shares worth $81.4K. The stake represents ﹤0.01% of the portfolio and ranks #2845 among its holdings. This is a return to the name: American Century Companies previously reported a position in SPRO as recently as Q3 2025.
American Century Companies first reported a position in SPRO in Q3 2025 and has held it in 2 quarters since. 34 funds tracked by Wall St. Rank hold SPRO as of Q2 2026.
- American Century Companies held 36,811 shares of Spero Therapeutics worth $81.4K as of Q2 2026.
- Spero Therapeutics was a new American Century Companies position in Q2 2026.
- Spero Therapeutics made up ﹤0.01% of American Century Companies's portfolio in Q2 2026, its #2845 holding.
- American Century Companies first reported a position in Spero Therapeutics in Q3 2025 and has held it in 2 quarters since.
- 34 funds tracked by Wall St. Rank held Spero Therapeutics as of Q2 2026.
Based on American Century Companies's 13F filing for Q2 2026, filed 12 Aug 2026.