FundWatcher
TWUAX
Ultra Fund
American Century Mutual Funds, Inc.

Portfolio moves

Net position changes between two of this fund's N-PORT snapshots. These are differences between point-in-time reports — not a trade log — and share counts can be affected by splits and other corporate actions.

Oct 31, 2025 → Jan 31, 2026

Expand a category to see the positions behind it, ranked by weight.

Security Shares Oct 2025 Shares Jan 2026 Δ shares End % Δ value
Viking Holdings Ltd 0 1,130,000 1,130,000 0.31% $81.53M
CIENA CORP 0 226,000 226,000 0.22% $56.91M
PLANET LABS PBC A 0 1,989,000 1,989,000 0.19% $49.67M
APPLOVIN CORP 0 100,000 100,000 0.18% $47.31M
Fixed Income Clearing Corp 3.66 02/02/2026 0 30,504,000 30,504,000 0.12% $30.50M
Security Shares Oct 2025 Shares Jan 2026 Δ shares End % Δ value
WORKDAY INC CL A 368,000 0 -368,000 0.00% -$88.29M
KEYENCE CORP 115,000 0 -115,000 0.00% -$42.68M
Fixed Income Clearing Corp 4.15 11/03/2025 38,597,000 0 -38,597,000 0.00% -$38.60M
State Street Navigator Securities Lending Government Money Market Portfolio 3,088,360 0 -3,088,360 0.00% -$3.09M
Security Shares Oct 2025 Shares Jan 2026 Δ shares End % Δ value
BROADCOM INC 2,172,000 2,784,000 612,000 3.50% $119.50M
NETFLIX INC 761,000 7,010,000 6,249,000 2.22% -$266.19M
INTUITIVE SURGICAL INC 848,143 873,981 25,838 1.67% -$12.47M
AMPHENOL CORPORATION CL A 1,640,000 2,154,000 514,000 1.18% $81.83M
CLOUDFLARE INC-A 968,000 1,247,000 279,000 0.84% -$24.04M
SNOWFLAKE INC CL A 792,000 1,072,000 280,000 0.78% -$11.13M
PALANTIR TECHNOLOGIES INC 953,000 1,301,000 348,000 0.72% -$334.32K
Ascendis Pharma A/S 462,000 664,000 202,000 0.57% $56.99M
VERTEX PHARMACEUTICALS INC 197,000 275,000 78,000 0.49% $45.39M
JOHNSON CONTROLS 826,000 940,000 114,000 0.43% $17.62M
CONSTELLATION ENERGY CORP 133,000 186,000 53,000 0.20% $2.07M
State Street Navigator Securities Lending Portfolio II 61,303 89,826 28,523 0.00% $28.52K
Security Shares Oct 2025 Shares Jan 2026 Δ shares End % Δ value
NVIDIA CORP 23,087,000 21,097,000 -1,990,000 15.31% -$642.62M
APPLE INC 9,313,959 8,430,950 -883,009 8.31% -$330.55M
ALPHABET INC CL A 5,216,087 4,613,455 -602,632 5.92% $92.64M
ALPHABET INC CL C 4,604,000 4,009,000 -595,000 5.15% $59.67M
MASTERCARD INC CL A 1,832,739 1,782,786 -49,953 3.65% -$51.11M
COSTCO WHOLESALE CORP 622,000 608,000 -14,000 2.17% $4.75M
APPLIED MATERIALS INC 1,506,000 1,384,000 -122,000 1.69% $95.04M
ORACLE CORP 2,362,000 1,988,000 -374,000 1.24% -$293.10M
ECOLAB INC 858,000 811,000 -47,000 0.87% $8.70M
ACUITY INC 530,000 492,000 -38,000 0.58% -$41.33M
WINGSTOP INC 576,000 446,000 -130,000 0.45% -$6.40M
MSCI INC 281,000 184,000 -97,000 0.43% -$53.29M
CHIPOTLE MEXICAN GRILL INC 3,209,000 2,761,000 -448,000 0.41% $5.63M
THE BOOKING HOLDINGS INC 27,000 19,000 -8,000 0.36% -$42.06M
TRADEWEB MARKETS INC A 1,239,000 767,000 -472,000 0.30% -$51.52M
EOG RESOURCES INC 981,000 599,000 -382,000 0.26% -$36.66M
DYNATRACE INC 3,748,000 1,608,000 -2,140,000 0.23% -$128.29M
SALESFORCE INC 680,000 272,000 -408,000 0.22% -$119.34M
DOCUSIGN INC 1,379,000 986,000 -393,000 0.20% -$49.06M
ARTHUR J GALLAGHAR AND CO 235,000 177,000 -58,000 0.17% -$14.49M
SOLD ZAR/BOUGHT USD 5 4 -1 0.00% -$633.88K
Security Shares Oct 2025 Shares Jan 2026 Δ shares End % Δ value
AMAZON.COM INC 8,534,000 8,534,000 0 7.76% -$41.99M
MICROSOFT CORP 3,909,000 3,909,000 0 6.39% -$342.12M
TESLA INC 2,792,000 2,792,000 0 4.56% -$73.01M
META PLATFORMS INC CL A 1,308,000 1,308,000 0 3.56% $89.14M
LILLY ELI and CO 374,000 374,000 0 1.47% $65.18M
ASML Holding NV 263,000 263,000 0 1.43% $99.04M
ANALOG DEVICES INC 1,020,000 1,020,000 0 1.20% $78.28M
INTERACTIVE BROKERS GROUP INC 3,740,000 3,740,000 0 1.06% $16.90M
FAIR ISAAC CORP 186,000 186,000 0 1.03% -$36.52M
VERTIV HOLDINGS CO 1,362,000 1,362,000 0 0.96% -$9.10M
ALNYLAM PHARMACEUTICALS INC 747,000 747,000 0 0.96% -$88.13M
ZSCALER INC 1,220,000 1,220,000 0 0.93% -$159.98M
SYNOPSYS INC 428,000 428,000 0 0.76% $4.83M
DATADOG INC CL A 1,506,000 1,506,000 0 0.74% -$50.44M
HOWMET AEROSPACE INC 928,000 928,000 0 0.73% $1.98M
INSULET CORP 710,000 710,000 0 0.69% -$40.61M
IDEXX LABS INC 257,000 257,000 0 0.65% $10.52M
REGENERON PHARMACEUTICALS INC 225,000 225,000 0 0.63% $20.17M
WESTINGHOUSE AIR BRAKE TECH CORP 705,000 705,000 0 0.62% $18.12M
ADVANCED DRAINAGE SYSTEMS INC 901,000 901,000 0 0.52% $10.80M
OKTA INC CL A 1,183,000 1,183,000 0 0.38% -$8.34M
DONALDSON CO INC 889,000 889,000 0 0.34% $15.73M
HEICO CORP 209,000 209,000 0 0.26% $2.75M
NORDSON CORP 228,000 228,000 0 0.24% $9.71M
CINTAS CORP 300,000 300,000 0 0.22% $2.44M
COPART INC 1,254,000 1,254,000 0 0.19% -$3.05M
VISA INC-CLASS A 126,000 126,000 0 0.15% -$2.38M
SAPIENCE WARRANTS 08/23/2027 281,340 281,340 0 0.00% $0

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