SDSI Top Holdings & Constituents
SDSI, offered by American Century, holds 388 reported positions across $255.7M in assets. Its largest holdings are State Street Institutional US Government Money Market Fund (GVMXX) (12.26%), U.S. TREASURY (T) (10.63%), and U.S. TREASURY (T) (3.65%). The 5 biggest positions account for 32.27% of reported assets. The table below lists every reported holding with its portfolio weight and market value in US dollars — open any constituent to research its own performance.
| Position | Weight | Market Value |
|---|---|---|
GVMXX State Street Institutional US Government Money Market Fund | 12.26% | $26.77M |
T U.S. TREASURY | 10.63% | $23.21M |
T U.S. TREASURY | 3.65% | $7.98M |
T U.S. TREASURY | 3.41% | $7.46M |
T U.S. TREASURY | 2.31% | $5.05M |
Holdings data comes from the latest SEC Form N-PORT-P filing for this fund, covering the reporting period ended May 31, 2026. Market values are reported in US dollars, and each weight represents the position's share of reported fund assets. Cash, derivatives, and rounding can mean displayed weights do not total 100%. Funds rebalance and file on a schedule, so this page may not reflect intraday or post-filing changes.