Gateway Equity Call Premium Fund Investments as of July 31, 2021 (Unaudited) Shares/ Principal Amount/ Interest Maturity Contracts Security Description Rate Date Market Value ($) % of Fund Common Stocks 2,186 3M Co. 432,697 0.51% 1,115 A.O. Smith Corp. 78,418 0.09% 5,310 Abbott Laboratories 642,404 0.75% 4,681 AbbVie, Inc. 544,400 0.64% 1,895 Accenture PLC, Class A 602,004 0.71% 378 Acuity Brands, Inc. 66,294 0.08% 858 Adient PLC 36,148 0.04% 1,341 Adobe, Inc. 833,606 0.98% 364 Advance Auto Parts, Inc. 77,190 0.09% 3,429 Advanced Micro Devices, Inc. 364,125 0.43% 849 AdvanSix, Inc. 28,399 0.03% 471 AGCO Corp. 62,224 0.07% 922 Air Products & Chemicals, Inc. 268,330 0.31% 1,850 Alcoa Corp. 74,277 0.09% 1,359 Alcon, Inc. 98,935 0.12% 285 Align Technology, Inc. 198,303 0.23% 4,416 Alliant Energy Corp. 258,468 0.30% 3,275 Ally Financial, Inc. 168,204 0.20% 138 Alnylam Pharmaceuticals, Inc. 24,694 0.03% 693 Alphabet, Inc., Class A 1,867,309 2.19% 663 Alphabet, Inc., Class C 1,793,030 2.10% 6,841 Altria Group, Inc. 328,642 0.39% 999 Amazon.com, Inc. 3,324,262 3.90% 4,959 Ameren Corp. 416,159 0.49% 3,935 America Movil SAB de CV, Series L, ADR 65,518 0.08% 1,056 American Campus Communities, Inc. 53,127 0.06% 3,734 American Electric Power Co., Inc. 329,040 0.39% 1,833 American Water Works Co., Inc. 311,812 0.37% 1,729 Amgen, Inc. 417,623 0.49% 4,312 Annaly Capital Management, Inc. 36,609 0.04% 821 Anthem, Inc. 315,272 0.37% 36,068 Apple, Inc. 5,260,878 6.17% 3,084 Applied Materials, Inc. 431,544 0.51% 3,115 Arch Capital Group Ltd. 121,485 0.14% 512 Arrow Electronics, Inc. 60,708 0.07% 729 Ashland Global Holdings, Inc. 62,016 0.07% 134 ASML Holding NV, (Registered) 102,743 0.12% 1,763 AstraZeneca PLC, Sponsored ADR 100,924 0.12% 17,475 AT&T, Inc. 490,174 0.57% 1,274 Avnet, Inc. 52,642 0.06% 21,899 Bank of America Corp. 840,046 0.98% 4,133 Bank of New York Mellon Corp. (The) 212,147 0.25% 1,619 Barrick Gold Corp. 35,246 0.04% 5,053 Berkshire Hathaway, Inc., Class B 1,406,199 1.65% 131 Bio-Rad Laboratories, Inc., Class A 96,876 0.11% 497 Biogen, Inc. 162,385 0.19% 606 BlackRock, Inc. 525,505 0.62% 1,766 Boeing Co. (The) 399,964 0.47% 113 Booking Holdings, Inc. 246,143 0.29% 6,683 Bristol-Myers Squibb Co. 453,575 0.53% 206 British American Tobacco PLC, Sponsored ADR 7,715 0.01% 590 Brunswick Corp. 61,596 0.07% 1,143 Bunge Ltd. 88,731 0.10% 309 Burlington Stores, Inc. 103,453 0.12% 1,549 Cadence Design Systems, Inc. 228,710 0.27% 836 Camden Property Trust 124,890 0.15% 2,853 Canadian Natural Resources Ltd. 94,206 0.11% 2,667 Carnival Corp. 57,741 0.07% 3,328 Carrier Global Corp. 183,872 0.22% 309 Carter's, Inc. 30,202 0.04% 1,820 Caterpillar, Inc. 376,285 0.44% 470 CDK Global, Inc. 22,555 0.03% 811 CDW Corp. 148,697 0.17% 2,580 Centene Corp. 177,014 0.21% 4,119 Charles Schwab Corp. (The) 279,886 0.33% 331 Check Point Software Technologies Ltd. 42,070 0.05% 1,062 Cheniere Energy, Inc. 90,196 0.11% 5,956 Chevron Corp. 606,380 0.71% 1,950 Chubb Ltd. 329,043 0.39% 1,006 Ciena Corp. 58,489 0.07% 1,142 Cigna Corp. 262,078 0.31% 642 Cincinnati Financial Corp. 75,679 0.09% 12,735 Cisco Systems, Inc. 705,137 0.83% 5,027 Citigroup, Inc. 339,926 0.40% Gateway Equity Call Premium Fund Investments as of July 31, 2021 (Unaudited) Shares/ Principal Amount/ Interest Maturity Contracts Security Description Rate Date Market Value ($) % of Fund 1,329 Clorox Co. (The) 240,403 0.28% 11,338 Coca-Cola Co. (The) 646,606 0.76% 11,513 Comcast Corp., Class A 677,310 0.79% 1,199 Comerica, Inc. 82,323 0.10% 5,654 ConocoPhillips 316,963 0.37% 336 Cooper Cos., Inc. (The) 141,715 0.17% 740 CoStar Group, Inc. 65,749 0.08% 1,190 Costco Wholesale Corp. 511,367 0.60% 1,350 Crown Castle International Corp. 260,671 0.31% 975 Crown Holdings, Inc. 97,266 0.11% 1,140 Cummins, Inc. 264,594 0.31% 990 Deere & Co. 357,974 0.42% 424 Dell Technologies, Inc., Class C 40,967 0.05% 3,720 Delta Air Lines, Inc. 148,428 0.17% 3,968 Devon Energy Corp. 102,533 0.12% 933 Dick's Sporting Goods, Inc. 97,163 0.11% 1,197 Digital Realty Trust, Inc. 184,529 0.22% 859 Discovery, Inc., Series C 23,287 0.03% 159 Domino's Pizza, Inc. 83,553 0.10% 2,963 Duke Realty Corp. 150,757 0.18% 491 East West Bancorp, Inc. 34,935 0.04% 2,022 Eli Lilly & Co. 492,357 0.58% 2,795 Emerson Electric Co. 281,988 0.33% 42 Enbridge, Inc. 1,653 0.00% 398 Enphase Energy, Inc. 75,461 0.09% 314 EPAM Systems, Inc. 175,777 0.21% 1,230 EQT Corp. 22,620 0.03% 566 Essex Property Trust, Inc. 185,705 0.22% 340 Exact Sciences Corp. 36,666 0.04% 984 Extra Space Storage, Inc. 171,354 0.20% 9,078 Exxon Mobil Corp. 522,620 0.61% 5,619 Facebook, Inc., Class A 2,002,050 2.35% 237 FactSet Research Systems, Inc. 84,675 0.10% 1,312 FedEx Corp. 367,294 0.43% 5,480 Fifth Third Bancorp 198,869 0.23% 957 First Republic Bank 186,634 0.22% 377 First Solar, Inc. 32,437 0.04% 435 FleetCor Technologies, Inc. 112,326 0.13% 4,536 Flex Ltd. 81,512 0.10% 1,030 Foot Locker, Inc. 58,772 0.07% 14,025 Ford Motor Co. 195,649 0.23% 582 Fortinet, Inc. 158,444 0.19% 1,240 Fortune Brands Home & Security, Inc. 120,863 0.14% 2,292 Fox Corp., Class B 76,186 0.09% 723 Gaming & Leisure Properties, Inc. 34,227 0.04% 884 Gentex Corp. 30,083 0.04% 1,198 Global Payments, Inc. 231,705 0.27% 1,192 Goldman Sachs Group, Inc. (The) 446,857 0.52% 1,836 Hain Celestial Group, Inc. (The) 73,275 0.09% 7,897 Hewlett Packard Enterprise Co. 114,506 0.13% 388 Hill-Rom Holdings, Inc. 53,722 0.06% 748 Hilton Grand Vacations, Inc. 30,421 0.04% 1,489 Hilton Worldwide Holdings, Inc. 195,729 0.23% 1,235 HollyFrontier Corp. 36,309 0.04% 1,558 Hologic, Inc. 116,912 0.14% 2,846 Home Depot, Inc. (The) 934,029 1.09% 2,420 Honeywell International, Inc. 565,772 0.66% 5,561 HP, Inc. 160,546 0.19% 403 Hubbell, Inc. 80,785 0.09% 258 Huntington Ingalls Industries, Inc. 52,924 0.06% 2,066 Huntsman Corp. 54,563 0.06% 176 ICON PLC 42,816 0.05% 616 IDEX Corp. 139,641 0.16% 466 IDEXX Laboratories, Inc. 316,195 0.37% 482 Illumina, Inc. 238,951 0.28% 614 Ingredion, Inc. 53,915 0.06% 201 Insulet Corp. 56,218 0.07% 8,921 Intel Corp. 479,236 0.56% 2,646 International Business Machines Corp. 372,980 0.44% 3,100 Invitation Homes, Inc. 126,108 0.15% 111 Jazz Pharmaceuticals PLC 18,817 0.02% 290 JD.com, Inc., ADR 20,555 0.02% 5,618 JetBlue Airways Corp. 83,090 0.10% 6,282 Johnson & Johnson 1,081,760 1.27% 4,110 Johnson Controls International PLC 293,536 0.34% 176 Jones Lang LaSalle, Inc. 39,172 0.05% Gateway Equity Call Premium Fund Investments as of July 31, 2021 (Unaudited) Shares/ Principal Amount/ Interest Maturity Contracts Security Description Rate Date Market Value ($) % of Fund 8,001 JPMorgan Chase & Co. 1,214,392 1.42% 4,039 Kellogg Co. 255,911 0.30% 1,073 Kilroy Realty Corp. 74,327 0.09% 1,479 KKR & Co., Inc. 94,301 0.11% 1,858 Las Vegas Sands Corp. 78,686 0.09% 343 Lear Corp. 60,018 0.07% 1,384 Leggett & Platt, Inc. 66,474 0.08% 739 Leidos Holdings, Inc. 78,644 0.09% 203 Lennox International, Inc. 66,874 0.08% 259 Liberty Broadband Corp., Class C 45,970 0.05% 1,689 Linde PLC 519,182 0.61% 760 Live Nation Entertainment, Inc. 59,956 0.07% 1,204 Lockheed Martin Corp. 447,491 0.52% 232 Lululemon Athletica, Inc. 92,839 0.11% 200 Madison Square Garden Entertainment Corp. 13,992 0.02% 475 Madison Square Garden Sports Corp. 77,301 0.09% 507 Magna International, Inc. 42,502 0.05% 342 ManpowerGroup, Inc. 40,554 0.05% 5,403 Manulife Financial Corp. 104,440 0.12% 1,569 Marvell Technology, Inc. 94,940 0.11% 2,297 MasterCard, Inc., Class A 886,504 1.04% 378 Match Group, Inc. 60,204 0.07% 2,228 Maxim Integrated Products, Inc. 222,599 0.26% 2,091 McDonald's Corp.