American Century Investments®
Quarterly Portfolio Holdings
American Century® U.S. Quality Growth ETF (QGRO)
May 31, 2024
| U.S. Quality Growth ETF - Schedule of Investments | ||
| MAY 31, 2024 (UNAUDITED) | ||
| Shares | Value ($) | |||||||
| COMMON STOCKS — 98.4% | ||||||||
| Aerospace and Defense — 2.8% | ||||||||
Axon Enterprise, Inc.(1) | 4,424 | 1,246,108 | ||||||
| General Electric Co. | 53,982 | 8,914,587 | ||||||
| Howmet Aerospace, Inc. | 72,159 | 6,108,259 | ||||||
| Woodward, Inc. | 40,903 | 7,628,410 | ||||||
| 23,897,364 | ||||||||
| Automobile Components — 0.2% | ||||||||
Aptiv PLC(1) | 17,198 | 1,431,905 | ||||||
| Beverages — 0.9% | ||||||||
| Coca-Cola Consolidated, Inc. | 7,418 | 7,277,355 | ||||||
| Biotechnology — 4.6% | ||||||||
Alkermes PLC(1) | 115,053 | 2,692,240 | ||||||
BioMarin Pharmaceutical, Inc.(1) | 9,795 | 735,311 | ||||||
Exelixis, Inc.(1) | 270,580 | 5,868,880 | ||||||
Halozyme Therapeutics, Inc.(1) | 62,870 | 2,784,512 | ||||||
Incyte Corp.(1) | 192,255 | 11,110,417 | ||||||
Neurocrine Biosciences, Inc.(1) | 84,143 | 11,393,804 | ||||||
Regeneron Pharmaceuticals, Inc.(1) | 1,408 | 1,380,065 | ||||||
United Therapeutics Corp.(1) | 4,993 | 1,373,724 | ||||||
Vertex Pharmaceuticals, Inc.(1) | 3,063 | 1,394,706 | ||||||
| 38,733,659 | ||||||||
| Broadline Retail — 1.7% | ||||||||
Amazon.com, Inc.(1) | 65,112 | 11,488,361 | ||||||
| Dillard's, Inc., Class A | 6,228 | 2,786,096 | ||||||
| 14,274,457 | ||||||||
| Building Products — 1.0% | ||||||||
| A O Smith Corp. | 16,422 | 1,373,536 | ||||||
| Advanced Drainage Systems, Inc. | 4,250 | 737,333 | ||||||
| Carlisle Cos., Inc. | 5,355 | 2,239,943 | ||||||
| Lennox International, Inc. | 2,807 | 1,410,798 | ||||||
| Trane Technologies PLC | 2,616 | 856,635 | ||||||
Trex Co., Inc.(1) | 8,533 | 737,934 | ||||||
| UFP Industries, Inc. | 11,655 | 1,392,539 | ||||||
| 8,748,718 | ||||||||
| Capital Markets — 2.5% | ||||||||
| Ameriprise Financial, Inc. | 1,712 | 747,476 | ||||||
Coinbase Global, Inc., Class A(1) | 3,397 | 767,450 | ||||||
| Evercore, Inc., Class A | 6,900 | 1,400,286 | ||||||
| LPL Financial Holdings, Inc. | 7,841 | 2,244,173 | ||||||
| Morningstar, Inc. | 2,527 | 728,408 | ||||||
| SEI Investments Co. | 214,892 | 14,550,337 | ||||||
| Tradeweb Markets, Inc., Class A | 7,059 | 769,502 | ||||||
| 21,207,632 | ||||||||
| Chemicals — 0.8% | ||||||||
| Ashland, Inc. | 7,583 | 759,589 | ||||||
Axalta Coating Systems Ltd.(1) | 21,295 | 757,889 | ||||||
| Ecolab, Inc. | 6,048 | 1,404,346 | ||||||
| NewMarket Corp. | 3,917 | 2,095,869 | ||||||
| RPM International, Inc. | 12,332 | 1,382,417 | ||||||
| 6,400,110 | ||||||||
| Commercial Services and Supplies — 1.5% | ||||||||
| Cintas Corp. | 14,952 | 10,137,008 | ||||||
| Rollins, Inc. | 46,806 | 2,138,566 | ||||||
| 12,275,574 | ||||||||
| Communications Equipment — 0.9% | ||||||||
Arista Networks, Inc.(1) | 24,312 | 7,236,467 | ||||||
| Construction and Engineering — 3.1% | ||||||||
| Comfort Systems USA, Inc. | 13,170 | 4,311,068 | ||||||
| EMCOR Group, Inc. | 54,449 | 21,162,148 | ||||||
| Quanta Services, Inc. | 2,688 | 741,727 | ||||||
| 26,214,943 | ||||||||
| Consumer Finance — 0.1% | ||||||||
| American Express Co. | 3,450 | 828,000 | ||||||
| Consumer Staples Distribution & Retail — 0.8% | ||||||||
| Costco Wholesale Corp. | 934 | 756,437 | ||||||
Sprouts Farmers Market, Inc.(1) | 9,213 | 727,643 | ||||||
| Target Corp. | 9,561 | 1,493,046 | ||||||
U.S. Foods Holding Corp.(1) | 25,908 | 1,368,719 | ||||||
| Walmart, Inc. | 32,758 | 2,154,166 | ||||||
| 6,500,011 | ||||||||
| Diversified Consumer Services — 0.6% | ||||||||
Duolingo, Inc.(1) | 4,229 | 809,430 | ||||||
| H&R Block, Inc. | 87,306 | 4,333,870 | ||||||
| 5,143,300 | ||||||||
| Electric Utilities — 0.4% | ||||||||
| Constellation Energy Corp. | 15,532 | 3,374,327 | ||||||
| Electrical Equipment — 1.6% | ||||||||
| Acuity Brands, Inc. | 34,340 | 8,915,008 | ||||||
| Vertiv Holdings Co. | 44,059 | 4,320,866 | ||||||
| 13,235,874 | ||||||||
| Electronic Equipment, Instruments and Components — 1.3% | ||||||||
| Amphenol Corp., Class A | 5,450 | 721,417 | ||||||
| Badger Meter, Inc. | 11,646 | 2,247,212 | ||||||
Fabrinet(1) | 3,067 | 734,639 | ||||||
Insight Enterprises, Inc.(1) | 22,443 | 4,387,606 | ||||||
| Jabil, Inc. | 11,623 | 1,381,975 | ||||||
| TE Connectivity Ltd. | 8,129 | 1,216,911 | ||||||
| 10,689,760 | ||||||||
| Energy Equipment and Services — 0.5% | ||||||||
Weatherford International PLC(1) | 37,926 | 4,564,015 | ||||||
| Entertainment — 1.1% | ||||||||
Netflix, Inc.(1) | 13,867 | 8,897,345 | ||||||
| Financial Services — 0.7% | ||||||||
Euronet Worldwide, Inc.(1) | 18,999 | 2,214,904 | ||||||
| Mastercard, Inc., Class A | 7,530 | 3,366,437 | ||||||
| Visa, Inc., Class A | 2,711 | 738,639 | ||||||
| 6,319,980 | ||||||||
| Food Products — 0.1% | ||||||||
| Lancaster Colony Corp. | 4,001 | 742,185 | ||||||
| Gas Utilities — 0.5% | ||||||||
| UGI Corp. | 156,612 | 3,987,341 | ||||||
| Ground Transportation — 0.7% | ||||||||
Uber Technologies, Inc.(1) | 94,624 | 6,108,925 | ||||||
| Health Care Equipment and Supplies — 3.0% | ||||||||
Boston Scientific Corp.(1) | 9,995 | 755,322 | ||||||
Dexcom, Inc.(1) | 58,344 | 6,929,517 | ||||||
IDEXX Laboratories, Inc.(1) | 4,116 | 2,045,446 | ||||||
Insulet Corp.(1) | 14,599 | 2,586,797 | ||||||
Lantheus Holdings, Inc.(1) | 34,953 | 2,860,204 | ||||||
Penumbra, Inc.(1) | 3,899 | 738,744 | ||||||
| ResMed, Inc. | 10,558 | 2,178,432 | ||||||
Shockwave Medical, Inc.(1) | 22,199 | 7,436,665 | ||||||
| 25,531,127 | ||||||||
| Health Care Providers and Services — 0.4% | ||||||||
| Cigna Group | 4,087 | 1,408,462 | ||||||
CorVel Corp.(1) | 2,697 | 646,876 | ||||||
DaVita, Inc.(1) | 4,978 | 732,363 | ||||||
| McKesson Corp. | 1,332 | 758,694 | ||||||
| 3,546,395 | ||||||||
| Hotels, Restaurants and Leisure — 6.4% | ||||||||
Airbnb, Inc., Class A(1) | 15,060 | 2,182,646 | ||||||
| Booking Holdings, Inc. | 6,792 | 25,648,969 | ||||||
Chipotle Mexican Grill, Inc.(1) | 3,756 | 11,754,477 | ||||||
Expedia Group, Inc.(1) | 12,496 | 1,410,298 | ||||||
| Texas Roadhouse, Inc. | 44,046 | 7,605,423 | ||||||
| Wingstop, Inc. | 15,326 | 5,649,930 | ||||||
| 54,251,743 | ||||||||
| Household Products — 2.0% | ||||||||
| Colgate-Palmolive Co. | 14,730 | 1,369,301 | ||||||
| Kimberly-Clark Corp. | 99,201 | 13,223,493 | ||||||
| Reynolds Consumer Products, Inc. | 76,590 | 2,178,220 | ||||||
| 16,771,014 | ||||||||
| Insurance — 1.6% | ||||||||
| Axis Capital Holdings Ltd. | 10,405 | 768,721 | ||||||
| Kinsale Capital Group, Inc. | 1,920 | 736,550 | ||||||
| Progressive Corp. | 58,020 | 12,252,664 | ||||||
| 13,757,935 | ||||||||
| Interactive Media and Services — 5.7% | ||||||||
Alphabet, Inc., Class A(1) | 146,102 | 25,202,595 | ||||||
Match Group, Inc.(1) | 46,833 | 1,434,495 | ||||||
| Meta Platforms, Inc., Class A | 43,926 | 20,505,974 | ||||||
Pinterest, Inc., Class A(1) | 18,000 | 746,820 | ||||||
| 47,889,884 | ||||||||
| IT Services — 2.5% | ||||||||
Cloudflare, Inc., Class A(1) | 10,098 | 683,534 | ||||||
Gartner, Inc.(1) | 1,668 | 700,009 | ||||||
GoDaddy, Inc., Class A(1) | 124,935 | 17,444,674 | ||||||
Okta, Inc.(1) | 7,529 | 667,672 | ||||||
VeriSign, Inc.(1) | 8,027 | 1,399,267 | ||||||
| 20,895,156 | ||||||||
| Leisure Products — 0.3% | ||||||||
Mattel, Inc.(1) | 157,049 | 2,793,902 | ||||||
| Life Sciences Tools and Services — 1.7% | ||||||||
Medpace Holdings, Inc.(1) | 32,629 | 12,605,888 | ||||||
Mettler-Toledo International, Inc.(1) | 933 | 1,310,016 | ||||||
| 13,915,904 | ||||||||
| Machinery — 2.3% | ||||||||
| Allison Transmission Holdings, Inc. | 18,448 | 1,398,543 | ||||||
| Caterpillar, Inc. | 3,937 | 1,332,753 | ||||||
| Donaldson Co., Inc. | 153,999 | 11,346,646 | ||||||
| ITT, Inc. | 16,010 | 2,127,409 | ||||||
| Lincoln Electric Holdings, Inc. | 6,716 | 1,318,754 | ||||||
| Mueller Industries, Inc. | 23,698 | 1,396,049 | ||||||
| Westinghouse Air Brake Technologies Corp. | 4,386 | 742,243 | ||||||
| 19,662,397 | ||||||||
| Media — 0.8% | ||||||||
| New York Times Co., Class A | 45,127 | 2,310,503 | ||||||
Trade Desk, Inc., Class A(1) | 48,217 | 4,473,573 | ||||||
| 6,784,076 | ||||||||
| Oil, Gas and Consumable Fuels — 1.3% | ||||||||
| APA Corp. | 46,769 | 1,427,858 | ||||||
| Chord Energy Corp. | 5,003 | 927,606 | ||||||
EnLink Midstream LLC(1) | 57,808 | 733,584 | ||||||
| Hess Corp. | 8,575 | 1,321,407 | ||||||
| HF Sinclair Corp. | 24,497 | 1,352,969 | ||||||
| Marathon Petroleum Corp. | 12,030 | 2,124,618 | ||||||
| Texas Pacific Land Corp. | 5,670 | 3,483,138 | ||||||
| 11,371,180 | ||||||||
| Personal Care Products — 0.7% | ||||||||
BellRing Brands, Inc.(1) | 98,852 | 5,750,221 | ||||||
| Professional Services — 0.2% | ||||||||
| Exponent, Inc. | 7,794 | 741,365 | ||||||
| Robert Half, Inc. | 20,656 | 1,326,735 | ||||||
| 2,068,100 | ||||||||
| Real Estate Management and Development — 0.2% | ||||||||
Jones Lang LaSalle, Inc.(1) | 7,043 | 1,423,179 | ||||||
| Semiconductors and Semiconductor Equipment — 5.9% | ||||||||
| Applied Materials, Inc. | 9,746 | 2,096,170 | ||||||
Cirrus Logic, Inc.(1) | 12,104 | 1,388,329 | ||||||
| KLA Corp. | 2,776 | 2,108,455 | ||||||
| Lam Research Corp. | 2,217 | 2,067,219 | ||||||
| Monolithic Power Systems, Inc. | 7,826 | 5,757,040 | ||||||
| NVIDIA Corp. | 16,371 | 17,948,018 | ||||||
Onto Innovation, Inc.(1) | 3,267 | 707,959 | ||||||
| Power Integrations, Inc. | 9,752 | 741,250 | ||||||
| QUALCOMM, Inc. | 82,115 | 16,755,566 | ||||||
| 49,570,006 | ||||||||
| Software — 22.9% | ||||||||
Adobe, Inc.(1) | 28,566 | 12,705,014 | ||||||
AppLovin Corp., Class A(1) | 79,056 | 6,441,483 | ||||||
Atlassian Corp., Class A(1) | 33,535 | 5,260,300 | ||||||
Autodesk, Inc.(1) | 77,001 | 15,523,402 | ||||||
Cadence Design Systems, Inc.(1) | 7,208 | 2,063,722 | ||||||
Crowdstrike Holdings, Inc., Class A(1) | 17,372 | 5,449,075 | ||||||
Datadog, Inc., Class A(1) | 6,088 | 670,776 | ||||||
DocuSign, Inc.(1) | 148,224 | 8,113,782 | ||||||
Dropbox, Inc., Class A(1) | 119,174 | 2,684,990 | ||||||
Elastic NV(1) | 27,039 | 2,813,408 | ||||||
Fair Isaac Corp.(1) | 1,616 | 2,084,527 | ||||||
Fortinet, Inc.(1) | 238,795 | 14,165,319 | ||||||
HubSpot, Inc.(1) | 7,468 | 4,563,321 | ||||||
Manhattan Associates, Inc.(1) | 75,405 | 16,554,414 | ||||||
| Microsoft Corp. | 32,234 | 13,381,300 | ||||||
Nutanix, Inc., Class A(1) | 178,367 | 9,866,371 | ||||||
Palantir Technologies, Inc., Class A(1) | 35,879 | 777,857 | ||||||
Palo Alto Networks, Inc.(1) | 54,561 | 16,090,585 | ||||||
| Pegasystems, Inc. | 45,535 | 2,616,441 | ||||||
Qualys, Inc.(1) | 42,844 | 6,024,723 | ||||||
ServiceNow, Inc.(1) | 33,620 | 22,085,987 | ||||||
Smartsheet, Inc., Class A(1) | 52,150 | 1,929,550 | ||||||
SPS Commerce, Inc.(1) | 14,830 | 2,789,375 | ||||||
Tenable Holdings, Inc.(1) | 17,237 | 727,229 | ||||||
UiPath, Inc., Class A(1) | 39,045 | 478,692 | ||||||
Workday, Inc., Class A(1) | 65,498 | 13,849,552 | ||||||
Workiva, Inc.(1) | 9,210 | 708,894 | ||||||
Zoom Video Communications, Inc., Class A(1) | 22,119 | 1,356,779 | ||||||
Zscaler, Inc.(1) | 4,324 | 734,907 | ||||||
| 192,511,775 | ||||||||
| Specialized REITs — 0.3% | ||||||||
| SBA Communications Corp. | 14,298 | 2,812,131 | ||||||
| Specialty Retail — 2.4% | ||||||||
Burlington Stores, Inc.(1) | 11,380 | 2,731,769 | ||||||
| Dick's Sporting Goods, Inc. | 7,399 | 1,684,308 | ||||||
| Gap, Inc. | 132,372 | 3,833,493 | ||||||
| Ross Stores, Inc. | 5,638 | 787,967 | ||||||
| TJX Cos., Inc. | 7,422 | 765,208 | ||||||
Ulta Beauty, Inc.(1) | 3,671 | 1,450,376 | ||||||
| Williams-Sonoma, Inc. | 31,767 | 9,314,720 | ||||||
| 20,567,841 | ||||||||
| Technology Hardware, Storage and Peripherals — 0.7% | ||||||||
| Apple, Inc. | 7,388 | 1,420,343 | ||||||
Pure Storage, Inc., Class A(1) | 71,003 | 4,280,771 | ||||||
| 5,701,114 | ||||||||
| Textiles, Apparel and Luxury Goods — 3.2% | ||||||||
| Columbia Sportswear Co. | 31,007 | 2,654,819 | ||||||
Crocs, Inc.(1) | 9,680 | 1,506,595 | ||||||
Deckers Outdoor Corp.(1) | 6,457 | 7,063,441 | ||||||
| PVH Corp. | 12,310 | 1,477,323 | ||||||
| Ralph Lauren Corp. | 36,952 | 6,905,590 | ||||||
Skechers USA, Inc., Class A(1) | 76,750 | 5,481,485 | ||||||
| Tapestry, Inc. | 33,381 | 1,451,740 | ||||||
| 26,540,993 | ||||||||
| Trading Companies and Distributors — 5.5% | ||||||||
| Applied Industrial Technologies, Inc. | 44,714 | 8,629,802 | ||||||
Beacon Roofing Supply, Inc.(1) | 33,490 | 3,250,539 | ||||||
Core & Main, Inc., Class A(1) | 124,265 | 7,152,693 | ||||||
| MSC Industrial Direct Co., Inc., Class A | 90,668 | 7,788,381 | ||||||
| WW Grainger, Inc. | 21,025 | 19,373,697 | ||||||
| 46,195,112 | ||||||||
TOTAL COMMON STOCKS (Cost $748,620,531) | 828,400,432 | |||||||
| RIGHTS — 0.0% | ||||||||
| Health Care Equipment and Supplies — 0.0% | ||||||||
ABIOMED, Inc.(1) (Cost $2,638) | 2,586 | 2,638 | ||||||
| SHORT-TERM INVESTMENTS — 0.0% | ||||||||
| Money Market Funds — 0.0% | ||||||||
State Street Institutional U.S. Government Money Market Fund, Premier Class (Cost $491,402) | 491,402 | 491,402 | ||||||
TOTAL INVESTMENT SECURITIES — 98.4% (Cost $749,114,571) | 828,894,472 | |||||||
| OTHER ASSETS AND LIABILITIES — 1.6% | 13,155,415 | |||||||
| TOTAL NET ASSETS — 100.0% | $ | 842,049,887 | ||||||
| NOTES TO SCHEDULE OF INVESTMENTS | ||||||||
(1)Non-income producing.
SUPPLEMENTARY NOTES TO SCHEDULE OF INVESTMENTS
1. Investment Valuations
The fund determines the fair value of its investments and computes its net asset value (NAV) per share at the close of regular trading (usually 4 p.m. Eastern time) on the New York Stock Exchange (NYSE) on each day the NYSE is open. The value of investments of the fund is determined by American Century Investment Management, Inc. (ACIM) (the investment advisor), as the valuation designee, pursuant to its valuation policies and procedures. The Board of Trustees oversees the valuation designee and reviews its valuation policies and procedures at least annually.
Equity securities that are listed or traded on a domestic securities exchange are valued at the last reported sales price or at the official closing price as provided by the exchange. Equity securities traded on foreign securities exchanges are generally valued at the closing price of such securities on the exchange where primarily traded or at the close of the NYSE, if that is earlier. If no last sales price is reported, or if local convention or regulation so provides, the mean of the latest bid and asked prices may be used. Securities traded over-the-counter are valued at the mean of the latest bid and asked prices, the last sales price, or the official closing price.
Open-end management investment companies are valued at the reported NAV per share.
If the valuation designee determines that the market price for a portfolio security is not readily available or is believed by the valuation designee to be unreliable, such security is valued at fair value as determined in good faith by the valuation designee, in accordance with its policies and procedures. Circumstances that may cause the fund to determine that market quotations are not available or reliable include, but are not limited to: when there is a significant event subsequent to the market quotation; trading in a security has been halted during the trading day; or trading in a security is insufficient or did not take place due to a closure or holiday.
The valuation designee monitors for significant events occurring after the close of an investment’s primary exchange but before the fund’s NAV per share is determined. Significant events may include, but are not limited to: corporate announcements and transactions; regulatory news, governmental action and political unrest that could impact a specific investment or an investment sector; or armed conflicts, natural disasters and similar events that could affect investments in a specific country or region. The valuation designee also monitors for significant fluctuations between domestic and foreign markets, as evidenced by the U.S. market or such other indicators that it deems appropriate. The valuation designee may apply a model-derived factor to the closing price of equity securities traded on foreign securities exchanges. The factor is based on observable market data as provided by an independent pricing service.
2. Fair Value Measurements
The fund's investments valuation process is based on several considerations and may use multiple inputs to determine the fair value of the investments held by the fund. In conformity with accounting principles generally accepted in the United States of America, the inputs used to determine a valuation are classified into three broad levels.
•Level 1 valuation inputs consist of unadjusted quoted prices in an active market for identical investments.
•Level 2 valuation inputs consist of direct or indirect observable market data (including quoted prices for comparable investments, evaluations of subsequent market events, interest rates, prepayment speeds, credit risk, etc.). These inputs also consist of quoted prices for identical investments initially expressed in local currencies that are adjusted through translation into U.S. dollars.
•Level 3 valuation inputs consist of unobservable data (including a fund’s own assumptions).
The level classification is based on the lowest level input that is significant to the fair valuation measurement. The valuation inputs are not necessarily an indication of the risks associated with investing in these securities or other financial instruments.
As of period end, the fund's investment securities were classified as Level 1. The Schedule of Investments provides additional information on the fund's portfolio holdings.
This schedule of investments provides information about the fund’s portfolio holdings as of the date on the schedule. It is unaudited, and American Century Investments assumes no obligation to update or supplement the schedule to reflect subsequent changes. More information is available in the fund’s most recent annual or semiannual shareholder report.