Real Estate Fund SCHEDULE OF INVESTMENTS (Unaudited) March 31, 2021

Shares Value COMMON STOCKS† - 99.4% REITs - 93.1% REITs-Diversified - 24.9% American Tower Corp. — Class A 1,402 $ 335,162 Crown Castle International Corp. 1,603 275,924 Equinix, Inc. 376 255,526 Digital Realty Trust, Inc. 1,457 205,204 SBA Communications Corp. 632 175,412 Weyerhaeuser Co. 4,631 164,864 VICI Properties, Inc. 4,732 133,632 Duke Realty Corp. 2,976 124,784 WP Carey, Inc. 1,584 112,084 Gaming and Leisure Properties, Inc. 2,315 98,225 Lamar Advertising Co. — Class A 1,009 94,765 CoreSite Realty Corp. 647 77,543 Apartment Income REIT Corp. 1,804 77,139 New Residential Investment Corp. 6,107 68,704 PS Business Parks, Inc. 423 65,387 PotlatchDeltic Corp. 1,128 59,694 EPR Properties 1,219 56,793 Lexington Realty Trust 4,929 54,761 Outfront Media, Inc. 2,501 54,597 Uniti Group, Inc. 4,519 49,845 Total REITs-Diversified 2,540,045 REITs-Office Property - 11.1% Alexandria Real Estate Equities, Inc. 890 146,227 Boston Properties, Inc. 1,200 121,512 VEREIT, Inc. 2,410 93,074 Vornado Realty Trust 1,976 89,691 Kilroy Realty Corp. 1,298 85,188 Cousins Properties, Inc. 2,031 71,796 Douglas Emmett, Inc. 2,258 70,901 SL Green Realty Corp. 957 66,980 Highwoods Properties, Inc. 1,524 65,441 JBG SMITH Properties 2,003 63,675 Hudson Pacific Properties, Inc. 2,311 62,697 Equity Commonwealth 2,064 57,379 Corporate Office Properties Trust 1,995 52,528 Brandywine Realty Trust 3,528 45,546 Piedmont Office Realty Trust, Inc. — Class A 2,588 44,954 Total REITs-Office Property 1,137,589 REITs-Apartments - 10.7% Equity Residential 2,241 160,523 AvalonBay Communities, Inc. 851 157,018 Invitation Homes, Inc. 4,245 135,798 Essex Property Trust, Inc. 474 128,852 Mid-America Apartment Communities, Inc. 876 126,459 UDR, Inc. 2,552 111,931 American Homes 4 Rent — Class A 3,113 103,787 Camden Property Trust 925 101,667 American Campus Communities, Inc. 1,761 76,022 Total REITs-Apartments 1,102,057 REITs-Warehouse/Industries - 9.4% Prologis, Inc. 2,676 283,656 Americold Realty Trust 2,564 98,637 CyrusOne, Inc. 1,350 91,422 Rexford Industrial Realty, Inc. 1,601 80,690 First Industrial Realty Trust, Inc. 1,660 76,011 EastGroup Properties, Inc. 529 75,795 STAG Industrial, Inc. 2,163 72,698 Innovative Industrial Properties, Inc. 361 65,038 QTS Realty Trust, Inc. — Class A 1,016 63,033 Terreno Realty Corp. 1,080 62,392 Total REITs-Warehouse/Industries 969,372 REITs-Health Care - 9.4% Welltower, Inc. 2,394 171,482 Ventas, Inc. 2,597 138,524 Healthpeak Properties, Inc. 4,070 129,182 Medical Properties Trust, Inc. 5,184 110,316 Omega Healthcare Investors, Inc. 2,488 91,135 Healthcare Trust of America, Inc. — Class A 2,765 76,259 Healthcare Realty Trust, Inc. 2,123 64,369 Physicians Realty Trust 3,363 59,424 Sabra Health Care REIT, Inc. 3,390 58,850 National Health Investors, Inc. 760 54,933 Total REITs-Health Care 954,474 REITs-Storage - 6.5% Public Storage 838 206,785 Extra Space Storage, Inc. 993 131,622 Iron Mountain, Inc. 2,818 104,294 CubeSmart 2,283 86,366 Life Storage, Inc. 921 79,160 National Storage Affiliates Trust 1,570 62,690 Total REITs-Storage 670,917 REITs-Hotels - 4.8% MGM Growth Properties LLC — Class A 3,242 105,754 Host Hotels & Resorts, Inc.* 6,224 104,874 Park Hotels & Resorts, Inc. 3,174 68,495 Ryman Hospitality Properties, Inc. 808 62,628 Pebblebrook Hotel Trust 2,259 54,871 Apple Hospitality REIT, Inc. 3,765 54,856 Sunstone Hotel Investors, Inc. 4,015 50,027 Total REITs-Hotels 501,505 REITs-Single Tenant - 4.6% Realty Income Corp. 2,419 153,607 STORE Capital Corp. 2,811 94,169 National Retail Properties, Inc. 1,991 87,743 Spirit Realty Capital, Inc. 1,625 69,063 Agree Realty Corp. 955 64,281 Total REITs-Single Tenant 468,863 REITs-Shopping Centers - 4.3% Regency Centers Corp. 1,707 96,804 Kimco Realty Corp. 4,738 88,838 Federal Realty Investment Trust 848 86,030 Brixmor Property Group, Inc. 3,758 76,024 Weingarten Realty Investors 2,146 57,749

Real Estate Fund SCHEDULE OF INVESTMENTS (Unaudited) March 31, 2021

Shares Value COMMON STOCKS† - 99.4% (continued) REITs - 93.1% (continued) REITs-Shopping Centers - 4.3% (continued) Retail Opportunity Investments Corp. 2,637 $ 41,849 Total REITs-Shopping Centers 447,294 REITs-Mortgage - 2.9% AGNC Investment Corp. 5,641 94,543 Starwood Property Trust, Inc. 3,364 83,225 Blackstone Mortgage Trust, Inc. — Class A 2,151 66,681 Chimera Investment Corp. 4,244 53,899 Total REITs-Mortgage 298,348 REITs-Manufactured Homes - 2.3% Sun Communities, Inc. 854 128,134 Equity LifeStyle Properties, Inc. 1,679 106,852 Total REITs-Manufactured Homes 234,986 REITs-Regional Malls - 2.2% Simon Property Group, Inc. 1,660 188,858 Macerich Co.1 3,390 39,663 Total REITs-Regional Malls 228,521 Total REITs 9,553,971 Real Estate - 4.7% Real Estate Management/Services - 4.0% CBRE Group, Inc. — Class A* 2,062 163,125 Jones Lang LaSalle, Inc.* 527 94,354 Redfin Corp.* 1,211 80,640 eXp World Holdings, Inc.* 1,701 77,481 Total Real Estate Management/Services 415,600 Real Estate Operations/Development - 0.7% Howard Hughes Corp.* 741 70,491 Total Real Estate 486,091 Internet - 0.9% Opendoor Technologies, Inc.* 4,610 97,686 Diversified Financial Services - 0.7% Hannon Armstrong Sustainable Infrastructure Capital, Inc. 1,218 68,330 Total Common Stocks (Cost $6,154,244) 10,206,078

Face Amount REPURCHASE AGREEMENTS††,2 - 0.6% J.P. Morgan Securities LLC issued 03/31/21 at 0.01% due 04/01/21 $ 31,250 31,250 Barclays Capital, Inc. issued 03/31/21 at 0.01% due 04/01/21 14,208 14,208 BofA Securities, Inc. issued 03/31/21 at 0.01% due 04/01/21 12,967 12,967 Total Repurchase Agreements (Cost $58,425) 58,425

Shares SECURITIES LENDING COLLATERAL†,3 - 0.3% Money Market Fund First American Government Obligations Fund — Class Z, 0.03%4 27,195 27,195 Total Securities Lending Collateral (Cost $27,195) 27,195 Total Investments - 100.3% (Cost $6,239,864) $ 10,291,698 Other Assets & Liabilities, net - (0.3)% (32,130) Total Net Assets - 100.0% $ 10,259,568

* Non-income producing security. † Value determined based on Level 1 inputs. †† Value determined based on Level 2 inputs. 1 All or a portion of this security is on loan at March 31, 2021. 2 Repurchase Agreements. 3 Securities lending collateral. 4 Rate indicated is the 7-day yield as of March 31, 2021.

REIT — Real Estate Investment Trust