Schedule of Portfolio Investments Limited Duration Fund May 31, 2021 (Unaudited) Shares or Principal Amount Security Description Value Asset Backed Securities (24.5%) $ 2,434,071 AccessLex Institute, Series 2007-A, Class A3, 0.45% (US0003M + 30 bps), 5/25/36, Callable 5/25/23 @ 100* $ 2,400,914‌ 897,358 Asset Backed Securities Corp. Home Equity Loan Trust, Series 2006-HE1, Class A4, 0.71% (US0001M + 30 bps), 1/25/36, Callable 6/25/21 @ 100* 894,881‌ 922,497 Bayview Financial Mortgage Pass-Through Trust, Series 2005-C, Class M3, 1.09% (US0001M + 65 bps), 6/28/44, Callable 6/28/21 @ 100* 924,414‌ 302,309 Cazenovia Creek Funding II LLC, Series 2018-1A, Class A, 3.56%, 7/15/30(a) 303,748‌ 1,048,169 CDC Mortgage Capital Trust, Series 2002-HE1, Class A, 0.71% (US0001M + 62 bps), 1/25/33, Callable 6/25/21 @ 100* 1,041,836‌ 1,250,449 CIT Mortgage Loan Trust, Series 2007-1, Class 1A, 1.44% (US0001M + 135 bps), 10/25/37, Callable 9/25/24 @ 100*(b) 1,256,555‌ 245 Citigroup Mortgage Loan Trust, Inc., Series 2005- WF1, Class A5, 5.01%, 11/25/34, Callable 6/25/21 @ 100*(c) 246‌ 228 Countrywide Asset-Backed Certificates, Series 2002-S1, Class A5, 6.46%, 5/25/32, Callable 6/25/21 @ 100*(c)(d) 227‌ 1,338,370 Countrywide Asset-Backed Certificates, Series 2005-12, Class M2, 0.83% (US0001M + 49 bps), 2/25/36, Callable 6/25/21 @ 100* 1,336,862‌ 966 Countrywide Home Equity Loan Trust, Series 2004-C, Class C, 0.32% (US0001M + 22 bps), 1/15/34, Callable 6/15/21 @ 100* 962‌ 1,019,745 DB Master Finance LLC, Series 2017-1A, Class A2I, 3.63%, 11/20/47, Callable 11/20/21 @ 100*(b) 1,034,837‌ 1,368,313 Driven Brands Funding LLC, Series 2019-2A, Class A2, 3.98%, 10/20/49, Callable 10/20/24 @ 100*(b) 1,452,546‌ 457,984 Fremont Home Loan Trust, Series 2004-3, Class 10A1, 1.98% (US0001M + 188 bps), 11/25/34, Callable 6/25/21 @ 100* 409,653‌ 1,911,041 Goodgreen 2020-1 Trust, Series 2021-1A, Class A, 2.63%, 4/15/55, Callable 10/15/32 @ 100*(b) 1,971,855‌ 557,350 Home Equity Asset Trust, Series 2005-7, Class M1, 0.77% (US0001M + 45 bps), 1/25/36, Callable 6/25/21 @ 100* 556,868‌ 1,798,068 Home Equity Mortgage Loan Asset-Backed Trust, Series 2004-C, Class 2A3, 0.95% (US0001M + 86 bps), 3/25/35, Callable 6/25/21 @ 100* 1,795,778‌ 83 IMC Home Equity Loan Trust, Series 1998-1, Class A6, 7.02%, 6/20/29(c)(d) 84‌ 242,503 New Century Home Equity Loan Trust, Series 2005-A, Class A4W, 4.70%, 8/25/35, Callable 9/25/21 @ 100*(c)(d) 244,637‌ 1,734,291 NovaStar Mortgage Funding Trust, Series 2003-2, Class M2, 2.87% (US0001M + 278 bps), 9/25/33, Callable 6/25/21 @ 100* 1,775,551‌ 114,649 Residential Asset Mortgage Products, Inc., Series 2002-RS2, Class AI5, 6.03%, 3/25/32, Callable 6/25/21 @ 100* 118,439‌ Shares or Principal Amount Security Description Value Asset Backed Securities, continued $ 3,272 Saxon Asset Securities Trust, Series 2003-3, Class AF6, 4.48%, 12/25/33, Callable 6/25/21 @ 100*(c)(d) $ 3,329‌ 74,247 Soundview Home Equity Loan Trust, Series 2005-B, Class M2, 6.23%, 5/25/35, Callable 6/25/21 @ 100*(c)(d) 72,651 1,261,002 Structured Asset Investment Loan Trust, Series 2003-BC2, Class A1, 0.79% (US0001M + 68 bps), 4/25/33, Callable 6/25/21 @ 100* 1,257,858 408,684 Structured Asset Securities Corp Mortgage Pass-Through Certificates, Series 2004-6XS, Class A5A, 6.03%, 3/25/34, Callable 6/25/21 @ 100*(c)(d) 413,251 826,717 Sun Trust Student Loan Trust, Series 2006-1A, Class B, 0.45% (US0003M + 27 bps), 10/28/37, Callable 4/28/26 @ 100*(a) 759,541 655,000 ZAXBY'S Funding LLC, Series 2021-1A, Class A2, 3.24%, 7/30/51, Callable 7/30/25 @ 100*(b) 655,000 Total Asset Backed Securities (Cost $20,646,760) 20,682,523 Mortgage Backed Securities† (41.9%) Alt-A - Adjustable Rate Mortgage Backed Securities (1.0%) 94,787 Bear Stearns Alternative Trust, Series 2006-1, Class 21A2, 2.96%, 2/25/36, Callable 6/25/21 @ 100*(c) 79,813 10,036 Bear Stearns Alternative Trust, Series 2005-5, Class 26A1, 3.91%, 7/25/35, Callable 6/25/21 @ 100*(c) 8,131 14,556 Countrywide Alternative Loan Trust, Series 2005-24, Class 1A1, 1.44% (12MTA + 131 bps), 7/20/35, Callable 6/19/21 @ 100* 12,643 1,314 Deutsche Mortgage Securities, Inc., Series 2006-ABR, Class A1B1, 0.19% (US0001M + 10 bps), 10/25/36, Callable 6/25/21 @ 100* 1,022 4,280 Deutsche Mortgage Securities, Inc., Series 2003-4XS, Class A6A, 5.32% (US0003M + 119 bps), 10/25/33, Callable 6/25/21 @ 100*(d) 4,293 4,468 Deutsche Mortgage Securities, Inc., Series 2006-AB4, Class A1A, 6.00%, 10/25/36, Callable 6/25/21 @ 100*(c) 4,408 4,921 First Horizon Alternative Mortgage Securities, Series 2004-AA3, Class A1, 2.33%, 9/25/34, Callable 6/25/21 @ 100*(c) 4,887 20,749 Master Adjustable Rate Mortgage Trust, Series 2004-13, Class 2A1, 2.70%, 4/21/34, Callable 6/21/21 @ 100*(c) 20,797 592,136 Nomura Asset Acceptance Corp., Series 2005-AR4, Class 3A1, 3.13%, 8/25/35, Callable 6/25/21 @ 100*(c) 626,189 32,444 Residential Accredit Loans, Inc., Series 2004-QA4, Class NB21, 3.22%, 9/25/34, Callable 6/25/21 @ 100*(c) 33,499 17,987 Residential Accredit Loans, Inc., Series 2006-QA1, Class A21, 4.30%, 1/25/36, Callable 6/25/21 @ 100*(c) 16,343 812,025 Alt-A - Fixed Rate Mortgage Backed Securities (0.8%) 14,624 Chaseflex Trust, Series 2005-1, Class 2A4, 5.50%, 2/25/35, Callable 6/25/21 @ 100* 12,813 See notes to the schedule of portfolio investments. - 1 - Schedule of Portfolio Investments Limited Duration Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued Alt-A - Fixed Rate Mortgage Backed Securities, continued: $ 19,414 Citigroup Mortgage Alternative Loan Trust, Series 2006-A3, Class 1A5, 6.00%, 7/25/36, Callable 6/25/21 @ 100* $ 19,320 376 Countrywide Alternative Loan Trust, Series 2004-12CB, Class 1A1, 5.00%, 7/25/19, Callable 6/25/21 @ 100* 377 13,719 Countrywide Alternative Loan Trust, Series 2005-J13, Class 2A3, 5.50%, 11/25/35, Callable 6/25/21 @ 100* 12,132 18,558 Countrywide Alternative Loan Trust, Series 2006-2CB, Class A3, 5.50%, 3/25/36, Callable 6/25/21 @ 100* 11,872 19,182 Countrywide Alternative Loan Trust, Series 2006-31CB, Class A16, 6.00%, 11/25/36, Callable 10/25/21 @ 100 15,337 18,686 Countrywide Alternative Loan Trust, Series 2006-43CB, Class 1A4, 6.00%, 2/25/37, Callable 7/25/21 @ 100* 14,445 134,226 Countrywide Alternative Loan Trust, Series 2006-J8, Class A2, 6.00%, 2/25/37, Callable 2/25/23 @ 100* 86,372 66,440 Countrywide Alternative Loan Trust, Series 2004-J8, Class 2A1, 7.00%, 8/25/34, Callable 6/25/21 @ 100* 64,252 42,693 First Horizon Alternative Mortgage Securities, Series 2006-FA3, Class A6, 6.00%, 7/25/36, Callable 6/25/21 @ 100* 29,026 138 Master Alternative Loans Trust, Series 2004-3, Class 1A1, 5.00%, 3/25/19, Callable 6/25/21 @ 100* 145 736 Master Alternative Loans Trust, Series 2005-1, Class 5A1, 5.50%, 1/25/20, Callable 7/25/25 @ 100* 713 3,757 Master Alternative Loans Trust, Series 2004-3, Class 3A1, 6.00%, 4/25/34, Callable 6/25/21 @ 100* 3,805 300,805 Master Alternative Loans Trust, Series 2004-3, Class 5A1, 6.50%, 3/25/34, Callable 6/25/21 @ 100* 304,219 21,565 Master Alternative Loans Trust, Series 2004-1, Class 3A1, 7.00%, 1/25/34, Callable 6/25/21 @ 100* 23,237 3,303 Master Alternative Loans Trust, Series 2004-3, Class 8A1, 7.00%, 4/25/34, Callable 6/25/21 @ 100* 3,370 1,522 Residential Accredit Loans, Inc., Series 2003- QS14, Class A1, 5.00%, 7/25/18, Callable 6/25/21 @ 100* 1,370 101 Residential Accredit Loans, Inc., Series 2004-QS13, Class CB, 5.00%, 9/25/19, Callable 6/25/21 @ 100* 102 5,582 Residential Accredit Loans, Inc., Series 2004-QS6, Class A1, 5.00%, 5/25/19, Callable 6/25/21 @ 100* 5,256 28,807 Residential Accredit Loans, Inc., Series 2006-QS6, Class 1A2, 6.00%, 6/25/36, Callable 6/25/21 @ 100* 27,617 42,743 Residential Asset Securitization Trust, Series 2006-A9CB, Class A5, 6.00%, 9/25/36, Callable 10/25/22 @ 100* 22,211 Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued Alt-A - Fixed Rate Mortgage Backed Securities, continued: $ 28,550 Residential Asset Securitization Trust, Series 2007-A5, Class 2A3, 6.00%, 5/25/37, Callable 9/25/21 @ 100* $ 23,524 12,950 Wells Fargo Mortgage Backed Securities Trust, Series 2005-1, Class 2A3, 5.50%, 2/25/35, Callable 6/25/21 @ 100* 12,559 694,074 Prime Adjustable Rate Mortgage Backed Securities (4.4%) 7,802 Adjustable Rate Mortgage Trust, Series 2004-4, Class 1A1, 2.38%, 3/25/35, Callable 6/25/21 @ 100*(c) 7,820 3,184 Adjustable Rate Mortgage Trust, Series 2005-1, Class 2A22, 2.80%, 5/25/35(c) 3,214 336,618 American Home Mortgage Investment Trust, Series 2006-2, Class 3A2, 6.70%, 6/25/36, Callable 6/25/21 @ 100*(c)(d) 88,157 582,894 Banc of America Funding Trust, Series 2015-R4, Class 8A1, 0.28% (US0001M + 17 bps), 1/27/35, Callable 11/25/60 @ 100*(b) 581,929 4,394 Bank of America Mortgage Securities, Series 2004-E, Class 1A1, 2.43%, 6/25/34, Callable 6/25/21 @ 100*(c) 4,436 6,234 Bank of America Mortgage Securities, Series 2003-H, Class 2A3, 2.78%, 9/25/33, Callable 6/25/21 @ 100*(c) 6,255 8,255 Bank of America Mortgage Securities, Series 2006-A, Class 2A1, 2.79%, 2/25/36, Callable 6/25/21 @ 100*(c) 8,191 4,113 Bank of America Mortgage Securities, Series 2006-B, Class 2A1, 3.15%, 11/20/46, Callable 6/20/21 @ 100*(c) 3,947 5,325 Bear Stearns Adjustable Rate Mortgage Trust, Series 2005-9, Class A1, 2.41% (H15T1Y + 230 bps), 10/25/35, Callable 6/25/21 @ 100* 5,427 5,339 Bear Stearns Adjustable Rate Mortgage Trust, Series 2004-6, Class 1A1, 2.60%, 9/25/34, Callable 6/25/21 @ 100*(c) 5,150 4,368 Bear Stearns Adjustable Rate Mortgage Trust, Series 2004-10, Class 15A1, 2.64%, 1/25/35, Callable 6/25/21 @ 100*(c) 4,295 14,644 Bear Stearns Adjustable Rate Mortgage Trust, Series 2006-4, Class 1A1, 3.05%, 10/25/36, Callable 6/25/21 @ 100*(c) 14,384 13,509 Bear Stearns Mortgage Securities, Inc., Series 1997-6, Class 1A, 6.30%, 3/25/31, Callable 6/25/21 @ 100*(c) 13,515 12,313 Chase Mortgage Finance Corp., Series 2007-A2, Class 10A1, 3.34%, 7/25/37, Callable 6/25/21 @ 100*(c) 11,489 7,933 Citigroup Mortgage Loan Trust, Inc., Series 2005- 3, Class 2A2A, 3.06%, 8/25/35(c) 8,221 57,029 Coast Savings & Loan Association, Series 1992- 1, Class A, 2.57%, 7/25/22, Callable 6/25/21 @ 100*(c) 57,369 3,445 Countrywide Home Loans, Series 2003-60, Class 2A1, 2.24%, 2/25/34, Callable 6/25/21 @ 100*(c) 3,323 9,017 Countrywide Home Loans, Series 2003-58, Class 2A2, 2.83%, 2/19/34, Callable 6/19/21 @ 100*(c) 9,317 See notes to the schedule of portfolio investments. - 2 - Schedule of Portfolio Investments Limited Duration Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued Prime Adjustable Rate Mortgage Backed Securities, continued: $ 5,814 Countrywide Home Loans, Series 2004-12, Class 10A1, 3.04%, 8/25/34, Callable 6/25/21 @ 100*(c) $ 5,700 256 Countrywide Home Loans, Series 2003-42, Class 1A1, 3.99%, 9/25/33, Callable 6/25/21 @ 100*(c) 260 31,501 Credit Suisse First Boston Mortgage Securities Corp., Series 2002-AR28, Class CB3, 2.58%, 11/25/32, Callable 6/25/21 @ 100*(c) 16,526 27,499 Credit Suisse First Boston Mortgage Securities Corp., Series 2004-AR7, Class 2A1, 3.04%, 11/25/34, Callable 6/25/21 @ 100*(c) 29,313 8,244 First Horizon Mortgage Pass-Through Trust, Series 2005-AR4, Class 2A1, 2.94%, 10/25/35, Callable 6/25/21 @ 100*(c) 8,295 43,593 GMAC Mortgage Corp. Loan Trust, Series 2005-AR6, Class 3A1, 3.00%, 11/19/35, Callable 6/19/21 @ 100*(c) 43,223 11,389 GSR Mortgage Loan Trust, Series 2005-AR7, Class 2A1, 2.82%, 11/25/35, Callable 6/25/21 @ 100*(c) 11,492 28,284 GSR Mortgage Loan Trust, Series 2005-AR2, Class 1A2, 3.03%, 4/25/35, Callable 6/25/21 @ 100*(c) 28,459 7,438 Harborview Mortgage Loan Trust, Series 2005-14, Class 3A1A, 2.66%, 12/19/35, Callable 6/19/21 @ 100*(c) 7,201 67,874 Harborview Mortgage Loan Trust, Series 2004-10, Class 3A1B, 3.03%, 1/19/35, Callable 6/19/21 @ 100*(c) 72,592 12,569 Indymac Index Mortgage Loan Trust, Series 2004-AR4, Class 1A, 2.85%, 8/25/34, Callable 6/25/21 @ 100*(c) 12,510 25,188 Indymac Index Mortgage Loan Trust, Series 2004-AR4, Class 3A, 3.03%, 8/25/34, Callable 6/25/21 @ 100*(c) 25,602 24,955 Indymac Index Mortgage Loan Trust, Series 2006-AR13, Class A1, 3.08%, 7/25/36, Callable 10/25/21 @ 100*(c) 20,896 37,428 Indymac Index Mortgage Loan Trust, Series 2006-AR19, Class 1A2, 3.19%, 8/25/36, Callable 6/25/21 @ 100*(c) 28,351 669 JPMorgan Mortgage Trust, Series 2005-A4, Class 3A1, 2.74%, 7/25/35, Callable 6/25/21 @ 100*(c) 669 1,979 JPMorgan Mortgage Trust, Series 2006-A5, Class 3A4, 2.92%, 8/25/36, Callable 6/25/21 @ 100*(c) 1,787 796,909 LSTAR Securities Investment, Ltd., Series 2021-1, Class A, 1.91% (US0001M + 180 bps), 2/1/26, Callable 2/1/23 @ 100*(b) 796,736 600,000 Mello Warehouse Securitization Trust, Series 2021-2, Class C, 1.19% (US0001M + 110 bps), 4/25/55, Callable 4/25/24 @ 100*(b) 600,867 1,000,000 Mello Warehouse Securitization Trust, Series 2020-2, Class E, 2.34% (US0001M + 225 bps), 11/25/53, Callable 12/25/23 @ 100*(b) 1,002,482 9,486 Merrill Lynch Mortgage Investors Trust, Series 2004-1, Class 2A2, 2.12%, 12/25/34, Callable 6/25/21 @ 100*(c) 9,703 Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued Prime Adjustable Rate Mortgage Backed Securities, continued: $ 918‌ Merrill Lynch Mortgage Investors Trust, Series 2004-A1, Class 2A2, 2.31%, 2/25/34, Callable 11/25/21 @ 100*(c) $ 943‌ 9,015 Merrill Lynch Mortgage Investors Trust, Series 2004-A2, Class 1A, 2.93%, 7/25/34, Callable 2/25/26 @ 100*(c) 9,219 7,960 Morgan Stanley Mortgage Loan Trust, Series 2004-6AR, Class 3A, 2.75%, 8/25/34, Callable 3/25/30 @ 100*(c) 8,226 12,284 Morgan Stanley Mortgage Loan Trust, Series 2004-6AR, Class 2A2, 2.96%, 8/25/34, Callable 10/25/24 @ 100*(c) 12,631 2,846 Structured Adjustable Rate Mortgage Loan Trust, Series 2004-1, Class 3A1, 2.45%, 2/25/34, Callable 6/25/21 @ 100*(c) 2,818 23,489 Structured Adjustable Rate Mortgage Loan Trust, Series 2004-18, Class 1A2, 2.71%, 12/25/34, Callable 6/25/21 @ 100*(c) 23,028 7,959 Structured Asset Mortgage Investments, Inc., Series 2005-AR7, Class 1A1, 2.60%, 12/27/35, Callable 6/25/21 @ 100*(c) 8,287 13,448 Structured Asset Securities Corp., Series 2003-24A, Class 1A3, 2.34%, 7/25/33, Callable 6/25/21 @ 100*(c) 13,933 6,252 Washington Mutual Mortgage Pass-Through Certificates, Series 2004-AR10, Class A1B, 0.93% (US0001M + 42 bps), 7/25/44, Callable 6/25/21 @ 100* 6,337 4,350 Washington Mutual Mortgage Pass-Through Certificates, Series 2004-AR3, Class A2, 2.60%, 6/25/34, Callable 6/25/21 @ 100*(c) 4,470 53,129 Washington Mutual Mortgage Pass-Through Certificates, Series 2006-AR14, Class 1A1, 2.62%, 11/25/36, Callable 6/25/21 @ 100*(c) 52,799 8,945 Washington Mutual Mortgage Pass-Through Certificates, Series 2006-AR10, Class 1A2, 3.02%, 9/25/36, Callable 6/25/21 @ 100*(c) 8,831 1,500 Washington Mutual Mortgage Pass-Through Certificates, Series 2006-AR8, Class 1A1, 3.08%, 8/25/46, Callable 6/25/21 @ 100*(c) 1,491 3,712,116‌ Prime Fixed Mortgage Backed Securities (15.8%) 2,155,843 Angel Oak Mortgage Trust, Series 2019-6, Class A1, 2.62%, 11/25/59, Callable 12/25/21 @ 100*(b)(c) 2,172,518 2,470,460 Brean Asset Backed Securities Trust, Series RM1, Class A, 1.40%, 10/25/63, Callable 9/25/27 @ 100*(b)(c) 2,365,407 362,307 Citigroup Mortgage Loan Trust, Inc., Series 2014-C, Class A, 3.25%, 2/25/54, Callable 11/25/34 @ 100*(b)(c) 363,275 15,859 Citigroup Mortgage Loan Trust, Inc., Series 2003-1, Class WA2, 6.50%, 6/25/31, Callable 6/25/21 @ 100* 16,278 84,472 Citigroup Mortgage Loan Trust, Inc., Series 2004-NCM2, Class 1CB2, 6.75%, 8/25/34, Callable 6/25/21 @ 100* 89,938 15,357 Citigroup Mortgage Loan Trust, Inc., Series 2004-NCM2, Class 2CB3, 8.00%, 8/25/34, Callable 6/25/21 @ 100* 15,906 See notes to the schedule of portfolio investments. - 3 - Schedule of Portfolio Investments Limited Duration Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued Prime Fixed Mortgage Backed Securities, continued: $ 3,619 Credit Suisse First Boston Mortgage Securities Corp., Series 2004-7, Class 5A1, 5.00%, 10/25/19, Callable 6/25/21 @ 100* $ 3,603 78,573 Credit Suisse First Boston Mortgage Securities Corp., Series 2003-23, Class 1A11, 6.00%, 10/25/33 81,505 25,191 Credit Suisse First Boston Mortgage Securities Corp., Series 2003-8, Class 5A1, 6.50%, 4/25/33, Callable 6/25/21 @ 100* 26,179 20,175 Credit Suisse First Boston Mortgage Securities Corp., Series 2003-1, Class 1A1, 7.00%, 2/25/33, Callable 6/25/21 @ 100* 20,778 43,538 Credit Suisse First Boston Mortgage Securities Corp., Series 2002-10, Class 2B1, 7.50%, 5/25/32, Callable 6/25/21 @ 100* 18,846 225,995 Credit Suisse First Boston Mortgage Securities Corp., Series 2002-34, Class 1A1, 7.50%, 12/25/32, Callable 6/25/21 @ 100* 237,211 16,096 Galton Funding Mortgage Trust, Series 2018-1, Class A43, 3.50%, 11/25/57, Callable 11/25/22 @ 100*(b)(c) 16,153 25,707 GSR Mortgage Loan Trust, Series 2003-3F, Class 2A1, 4.50%, 4/25/33, Callable 6/25/21 @ 100* 25,591 21,954 GSR Mortgage Loan Trust, Series 2005-8F, Class 3A4, 6.00%, 11/25/35, Callable 9/25/23 @ 100* 13,268 1,270,830 JPMorgan Mortgage Trust, Series 2020-4, Class A3A, 2.50%, 11/25/50, Callable 3/25/23 @ 100*(b)(c) 1,290,055 789,962 JPMorgan Mortgage Trust, Series 2017-2, Class A4, 3.00%, 5/25/47, Callable 10/25/22 @ 100*(b)(c) 803,796 11,339 Lehman Mortgage Trust, Series 2005-3, Class 1A3, 5.50%, 1/25/36, Callable 6/25/21 @ 100* 8,578 520,447 MFRA Trust, Series 2017-RPL1, Class A1, 2.59%, 2/25/57, Callable 11/25/27 @ 100*(b)(c) 525,676 1,550,000 NewRez Warehouse Securitization Trust, Series 2021-1, Class D, 1.49% (US0001M + 140 bps), 5/25/55, Callable 5/25/24 @ 100*(b) 1,552,758 7,360 Residential Funding Mortgage Securities I, Series 2005-S7, Class A1, 5.50%, 11/25/35, Callable 6/25/21 @ 100* 7,055 13,659 Residential Funding Mortgage Securities I, Series 2003-S9, Class A1, 6.50%, 3/25/32, Callable 6/25/21 @ 100* 14,169 26,063 Sequoia Mortgage Trust, Series 2018-CH1, Class A10, 4.00%, 2/25/48, Callable 9/25/22 @ 100*(b)(c) 26,073 19,128 Sequoia Mortgage Trust, Series 2018-CH2, Class A12, 4.00%, 6/25/48, Callable 11/25/22 @ 100*(b)(c) 19,127 1,749,487 Starwood Mortgage Residential Trust, Series 2018-IMC2, Class A1, 4.12%, 10/25/48, Callable 12/25/21 @ 100*(b)(c) 1,776,496 77,808 Structured Asset Mortgage Investments, Inc., Series 1999-2, Class 3A, 6.75%, 5/25/29, Callable 6/25/21 @ 100* 80,825 Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued Prime Fixed Mortgage Backed Securities, continued: $ 1,728,459 Verus Securitization Trust, Series 2020-1, Class A1, 2.42%, 1/25/60, Callable 9/25/22 @ 100*(b)(c) $ 1,753,906 13,324,970 Subprime Mortgage Backed Securities (2.6%) 171,342 Towd Point Mortgage Trust, Series 2016-1, Class A1B, 2.75%, 2/25/55, Callable 2/25/23 @ 100*(b)(c) 171,780 458,795 Towd Point Mortgage Trust, Series 2017-1, Class A1, 2.75%, 10/25/56, Callable 7/25/26 @ 100*(b)(c) 465,694 883,049 Towd Point Mortgage Trust, Series 2017-2, Class A1, 2.75%, 4/25/57, Callable 12/25/23 @ 100*(b)(c) 895,894 685,708 Towd Point Mortgage Trust, Series 2017-6, Class A1, 2.75%, 10/25/57, Callable 7/25/24 @ 100*(b)(c) 705,164 2,238,532 U.S. Government Agency Mortgage Backed Securities (17.3%) 264,935 Fannie Mae, Series 2013-68, Class 10A1, 1.00%, 3/25/42 262,239 15,599 Fannie Mae, 1.70% (US0012M + 132 bps), 1/1/35, Pool #805386 16,144 119,166 Fannie Mae, Series 2012-31, Class PA, 2.00%, 4/25/41 121,656 248,370 Fannie Mae, Series 2012-51, Class EB, 2.00%, 1/25/40 251,571 223,191 Fannie Mae, Series 2012-96, Class PD, 2.00%, 7/25/41 226,457 224,460 Fannie Mae, Series 2013-18, Class 10A1, 2.00%, 12/25/42 230,644 1,778 Fannie Mae, 2.07% (H15T1Y + 187 bps), 12/1/22, Pool #303247 1,783 139,363 Fannie Mae, Series 2013-73, Class 10A1, 2.25%, 6/25/42 144,046 156,539 Fannie Mae, Series 2013-74, Class 10A1, 2.25%, 6/25/42(c) 162,057 1,702 Fannie Mae, 2.39% (H15T1Y + 216 bps), 6/1/32, Pool #725286 1,705 26,866 Fannie Mae, 2.67% (H15T1Y + 229 bps), 2/1/30, Pool #556998 26,801 97,710 Fannie Mae, Series 2011-118, Class 10A1, 3.00%,11/25/41 104,711 291,232 Fannie Mae, Series 2014-1, Class AB, 3.00%, 6/25/43 304,936 1,005,713 Fannie Mae, Series 2018-83, Class LC, 3.00%, 11/25/48 1,049,396 757,568 Fannie Mae, Series 2003-W14, Class 2A, 3.88%, 1/25/43, Callable 6/25/21 @ 100*(c) 793,674 1,854,122 Fannie Mae, Series 2003-W12, Class 3A, 3.94%, 3/25/43, Callable 6/25/21 @ 100*(c) 1,991,313 556,422 Fannie Mae, Series 2003-W16, Class AF5, 4.40%, 11/25/33, Callable 6/25/21 @ 100*(c)(d) 619,460 7,313 Fannie Mae, Series 2001-W4, Class AF6, 5.11%, 1/25/32, Callable 6/25/21 @ 100*(c)(d) 7,849 2,552,308 Fannie Mae, Series 2004-W3, Class A7, 5.50%, 5/25/34, Callable 6/25/21 @ 100* 2,893,742 243 Fannie Mae, Series 1992-129, Class L, 6.00%, 7/25/22 246 See notes to the schedule of portfolio investments. - 4 - Schedule of Portfolio Investments Limited Duration Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued U.S. Government Agency Mortgage Backed Securities, continued: $ 8,251 Fannie Mae, Series 2001-W2, Class AF6, 6.09%, 10/25/31, Callable 6/25/21 @ 100*(c)(d) $ 8,823 8,350 Fannie Mae, Series 2001-W1, Class AF6, 6.40%, 7/25/31, Callable 6/25/21 @ 100*(c)(d) 10,344 1 Fannie Mae, Series 1991-108, Class J, 7.00%, 9/25/21 1 84 Fannie Mae, Series 1992-195, Class C, 7.50%, 10/25/22 86 1,000 Fannie Mae, Series 1996-42, Class LL, 7.50%, 9/25/26 1,090 782,524 Fannie Mae Grantor Trust, Series 2003-T4, Class 2A5, 4.66%, 9/26/33, Callable 6/26/21 @ 100*(c)(d) 869,913 81,359 Freddie Mac, Series 4146, Class 10A1, 1.50%, 10/15/42 83,088 692,560 Freddie Mac, Series 4220, Class KC, 1.50%, 5/15/32 709,525 3,523 Freddie Mac, 1.77% (US0006M + 154 bps), 4/1/36, Pool #1N0148 3,661 222,030 Freddie Mac, Series 4039, Class ME, 2.00%, 12/15/40(c) 224,740 158,626 Freddie Mac, Series 3982, Class MD, 2.00%, 5/15/39 162,827 211,692 Freddie Mac, Series 4019, Class GB, 2.00%, 12/15/41 218,964 187,449 Freddie Mac, Series 4030, Class DA, 2.00%, 2/15/41 190,628 560,722 Freddie Mac, Series 4272, Class YG, 2.00%, 11/15/26 572,045 185,897 Freddie Mac, Series 4408, Class GA, 2.00%, 9/15/41 191,058 25,355 Freddie Mac, Series 3890, Class BA, 2.50%, 11/15/40 25,725 243,446 Freddie Mac, Series 3913, Class PC, 2.50%, 3/15/41 249,816 322,891 Freddie Mac, Series 4312, Class 10A1, 2.50%, 12/15/41 333,551 8,781 Freddie Mac, Series 4017, Class MA, 3.00%, 3/15/41 8,819 536,365 Freddie Mac, Series 4374, Class GA, 3.00%, 9/15/36 571,742 377,415 Freddie Mac, Series T-67, Class 1A1C, 3.16%, 3/25/36, Callable 6/25/21 @ 100*(c) 406,072 7,645 Freddie Mac, 4.00%, 9/1/33, Pool #N31025 8,190 1,659 Freddie Mac, Series 3688, Class HQ, 6.00%, 11/15/21 1,669 328 Freddie Mac, Series 1474, Class E, 7.00%, 2/15/23, Callable 7/15/21 @ 100* 341 325 Freddie Mac, Series 1310, Class J, 8.00%, 6/15/22, Callable 7/15/21 @ 100* 334 261 Freddie Mac, Series 1312, Class I, 8.00%, 7/15/22, Callable 7/15/21 @ 100* 269 786 Government National Mortgage Assoc., 2.00% (H15T1Y + 150 bps), 1/20/23, Pool #8123 794 1,785 Government National Mortgage Assoc., 2.00% (H15T1Y + 150 bps), 1/20/25, Pool #8580 1,829 968 Government National Mortgage Assoc., 2.00% (H15T1Y + 150 bps), 3/20/26, Pool #8832 980 1,383 Government National Mortgage Assoc., 2.00% (H15T1Y + 150 bps), 3/20/29, Pool #80263 1,405 344,080 Government National Mortgage Assoc., Series 2013-69, 2.00%, 9/20/42 357,090 1,810 Government National Mortgage Assoc., 2.13% (H15T1Y + 150 bps), 12/20/27, Pool #80141 1,881 Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued U.S. Government Agency Mortgage Backed Securities, continued: $ 4,700 Government National Mortgage Assoc., 2.13% (H15T1Y + 150 bps), 11/20/29, Pool #876947 $ 4,746 223 Government National Mortgage Assoc., 2.50% (H15T1Y + 150 bps), 12/20/21, Pool #8889 223 2,881 Government National Mortgage Assoc., 2.50% (H15T1Y + 150 bps), 1/20/25, Pool #8585 2,961 9,195 Government National Mortgage Assoc., 2.87% (H15T1Y + 150 bps), 5/20/34, Pool #80916 9,469 84 Government National Mortgage Assoc., 6.50%, 12/15/25, Pool #414856 94 52 Government National Mortgage Assoc., 7.00%, 4/20/24, Pool #1655 54 27 Government National Mortgage Assoc., 7.00%, 11/20/26, Pool #2320 27 30,491 Government National Mortgage Assoc., Series 2013-176, Class BE, 7.16%, 3/16/46, Callable 6/16/21 @ 100*(c) 46,060 177 Government National Mortgage Assoc., 7.50%, 3/15/24, Pool #376439 180 14,491,544 Total Mortgage Backed Securities (Cost $34,967,016) 35,273,261 Corporate Bonds (15.7%) Aerospace & Defense (1.3%) 920,000 Boeing Co. (The), 7.95%, 8/15/24 1,116,634 Banks (4.9%) 1,450,000 Bank of America Corp., 3.55% (US0003M + 78 bps), 3/5/24, Callable 3/5/23 @ 100* 1,529,493 1,500,000 Mizuho Financial Group, Inc., 2.95%, 2/28/22 1,531,156 1,000,000 Mizuho Financial Group, Inc., 3.55%, 3/5/23 1,056,589 Capital Markets (0.0%^) 4,117,238 2,000,000 Lehman Brothers Holdings, Inc., 6.00%, 7/19/12, MTN (e) 14,000 Oil, Gas & Consumable Fuels (6.6%) 2,515,000 HollyFrontier Corp., 2.63%, 10/1/23 2,599,813 900,000 ONEOK, Inc., 2.20%, 9/15/25, Callable 8/15/25 @ 100* 925,371 1,915,000 ONEOK, Inc., 2.75%, 9/1/24, Callable 8/1/24 @ 100* 2,021,854 5,547,038 Tobacco (2.9%) 2,150,000 Altria Group, Inc., 4.40%, 2/14/26, Callable 12/14/25 @ 100* 2,436,808 Total Corporate Bonds (Cost $13,734,123) 13,231,718 Taxable Municipal Bonds (1.3%) Georgia (1.3%) 1,000,000 State of Georgia, Build America Bonds, GO, Series H,4.50%,11/1/25 1,098,559 Total Taxable Municipal Bonds (Cost $1,054,675) 1,098,559 U.S. Government Agency Securities (3.6%) Federal Farm Credit Banks 1,000,000 1.23%, 9/10/29, Callable 9/10/21 @ 100* 966,950 Federal Home Loan Banks 1,250,000 0.75%, 4/30/27, Callable 7/30/21 @ 100*(c) 1,250,069 850,500 1.11%, 5/28/26, Callable 6/28/21 @ 100* 850,520 2,100,589 Total U.S. Government Agency Securities (Cost $3,100,500) 3,067,539 See notes to the schedule of portfolio investments. - 5 - Schedule of Portfolio Investments Limited Duration Fund May 31, 2021 (Unaudited) Concluded Shares or Principal Amount Security Description Value U.S. Treasury Obligations (9.8%) U.S. Treasury Notes $ 4,169,000‌ 0.50%,2/28/26 $ 4,121,122‌ 4,000,000‌ 1.50%,10/31/24 4,147,187‌ Total U.S. Treasury Obligations (Cost $8,070,367) 8,268,309‌ Investment in Affiliates (3.8%) 3,204,243 Cavanal Hill Government Securities Money Market Fund, Select Shares, 0.01%(f) 3,204,243‌ Total Investment in Affiliates (Cost $3,204,243) 3,204,243‌ Total Investments (Cost $84,777,684) - 100.6% 84,826,152‌ Liabilities in excess of other assets — (0.6)% (542,572‌) Net Assets - 100.0% $ 84,283,580‌ (a) Represents a restricted security, purchased under Rule 144A, Section 4(2), which is exempt from registration under the Securities Act of 1933, as amended. The security has been deemed illiquid according to the policies and procedures adopted by the Board of Trustees. At May 31, 2021, illiquid securities were 1.3% of the Fund's net assets. (b) Represents a restricted security, purchased under Rule 144A, Section 4(2), which is exempt from registration under the Securities Act of 1933, as amended. The security has been deemed liquid according to the policies and procedures adopted by the Board of Trustees. (c) The rate for certain asset-backed and mortgage-backed securities may vary based on factors relating to the pool of assets underlying the security. The rate presented is the rate in effect at May 31, 2021. (d) Step Bond: Coupon rate is set for an initial period and then increased to a higher coupon rate at a specified date. The rate shown is the rate in effect at May 31, 2021. (e) Issuer has defaulted on the payment of interest. (f) Money market investment. The rate presented on the Schedule of Portfolio Investments is the rate in effect at May 31, 2021. * Represents next call date. Additional subsequent call dates and amounts may apply to this security. ^ Represents less than 0.05%. † Mortgage backed securities are classified based on the characteristics of their underlying collateral, the fixed vs. variable nature of the obligations, and the credit standing of the mortgagors. The fixed or variable rate nature of securities interest payments to which the fund is entitled may not coincide with the payment nature of the collateral underlying the securities. 12MTA 12 Month Treasury Average GO General Obligation H15T1Y 1 Year Treasury Constant Maturity Rate LIBOR London Interbank Offered Rate MTN Medium Term Note US0001M 1 Month US Dollar LIBOR US0003M 3 Month US Dollar LIBOR US0006M 6 Month US Dollar LIBOR US0012M 12 Month US Dollar LIBOR See notes to the schedule of portfolio investments. - 6 - Schedule of Portfolio Investments Moderate Duration Fund May 31, 2021 (Unaudited) Shares or Principal Amount Security Description Value Asset Backed Securities (11.9%) $ 378,755‌ AmeriCredit Automobile Receivables Trust, Series 2016-4, Class D, 2.74%, 12/8/22, Callable 7/8/21 @ 100* $ 379,005‌ 275,999‌ Bayview Opportunity Master Fund IVb Trust, Series 2017-SPL4, Class A, 3.50%, 1/28/55, Callable 7/28/21 @ 100*(a)(b) 283,289‌ 378,908 CLI Funding VI LLC, Series 2020-3A, Class A, 2.07%, 10/18/45, Callable 11/18/22 @ 100*(b) 383,514‌ 314,438‌ DB Master Finance LLC, Series 2017-1A, Class A2I, 3.63%, 11/20/47, Callable 11/20/21 @ 100*(b) 319,091‌ 275,000 Domino's Pizza Master Issuer LLC, Series 2021-1A, Class A2I, 2.66%, 4/25/51, Callable 10/25/25 @ 100*(b) 279,410‌ 289,156‌ Longtrain Leasing III LLC, Series 2015-1A, Class A2, 4.06%, 1/15/45, Callable 1/15/25 @ 100*(b) 294,036‌ 175,000 Sabey Data Center Issuer LLC, Series 2020-1, Class A2, 3.81%, 3/20/45, Callable 11/20/23 @ 100*(b) 186,554‌ 263,233 Textainer Marine Containers VII, Ltd., Series 2A, Class A, 2.23%, 4/20/46, Callable 4/20/23 @ 100*(b) 266,519‌ 300,000 Vantage Data Centers LLC, Series 2020-1A, Class A2, 1.65%, 9/15/45, Callable 9/15/23 @ 100*(b) 300,317‌ 290,650 VR Funding LLC, Series 2020-1A, Class A, 2.79%, 11/15/50, Callable 11/15/23 @ 100*(b) 286,213‌ 155,000 Willis Engine Structured Trust VI, Series 2021-A, Class A, 3.10%, 5/15/46, Callable 5/15/29 @ 100*(b) 154,992‌ Total Asset Backed Securities (Cost $3,113,543) 3,132,940 Mortgage Backed Securities† (22.2%) Alt-A - Adjustable Rate Mortgage Backed Securities (0.5%) 131,618 Bear Stearns Alternative-A Trust, Series 2005-7, Class 11A1, 0.65% (US0001M + 54 bps), 8/25/35, Callable 6/25/21 @ 100* 132,701‌ Alt-A - Fixed Rate Mortgage Backed Securities (2.0%) 54,162 Chaseflex Trust, Series 2005-2, Class 1A1, 6.00%, 6/25/35, Callable 6/25/21 @ 100* 48,021‌ 3,403 Countrywide Alternative Loan Trust, Series 2005-3CB, Class 1A4, 5.25%, 3/25/35, Callable 6/25/21 @ 100* 3,355‌ 10,378 Countrywide Alternative Loan Trust, Series 2004-5CB, Class 1A1, 6.00%, 5/25/34, Callable 6/25/21 @ 100* 10,697‌ 70,645 Countrywide Alternative Loan Trust, Series 2006-J8, Class A2, 6.00%, 2/25/37, Callable 2/25/23 @ 100* 45,459‌ 52,137‌ Deutsche Alternative-A Securities, Inc. Mortgage Loan Trust, Series 2006-AB2, Class A3, 4.97%, 6/25/36, Callable 6/25/21 @ 100*(a) 51,837‌ 9,817 Master Alternative Loans Trust, Series 2004-1, Class 4A1, 5.50%, 2/25/34, Callable 6/25/21 @ 100* 10,137‌ 3,768 Master Alternative Loans Trust, Series 2004-13, Class 12A1, 5.50%, 12/25/19, Callable 6/25/21 @ 100* 3,485‌ Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued Alt-A - Fixed Rate Mortgage Backed Securities, continued: $ 12,029 Master Alternative Loans Trust, Series 2004-4, Class 1A1, 5.50%, 5/25/34, Callable 6/25/21 @ 100* $ 12,387‌ 154 ‌Master Alternative Loans Trust, Series 2005-1, Class 5A1, 5.50%, 1/25/20, Callable 7/25/25 @ 100* 150‌ 31,175 ‌Master Alternative Loans Trust, Series 2004-6, Class 10A1, 6.00%, 7/25/34, Callable 6/25/21 @ 100* 32,497‌ 19,629‌ Master Alternative Loans Trust, Series 2004-6, Class 7A1, 6.00%, 7/25/34, Callable 6/25/21 @ 100* 20,453‌ 7,408‌ Master Alternative Loans Trust, Series 2003-7, Class 6A1, 6.50%, 12/25/33, Callable 6/25/21 @ 100* 7,790‌ 14,843 ‌Master Alternative Loans Trust, Series 2004-4, Class 8A1, 6.50%, 5/25/34, Callable 6/25/21 @ 100* 15,432‌ 27,357 ‌Master Alternative Loans Trust, Series 2004-6, Class 6A1, 6.50%, 7/25/34, Callable 6/25/21 @ 100* 28,890‌ 4,911‌ Nomura Asset Acceptance Corp., Series 2005-AP1, Class 2A5, 5.36%, 2/25/35, Callable 6/25/21 @ 100*(a)(c) 5,027‌ 25,731 ‌Nomura Asset Acceptance Corp., Series 2005-AP2, Class A5, 5.48%, 5/25/35, Callable 6/25/21 @ 100*(a)(c) 17,110‌ 1,147 ‌Nomura Asset Acceptance Corp., Series 2005-WF1, Class 2A5, 5.66%, 3/25/35, Callable 6/25/21 @ 100*(a)(c) 1,166‌ 86,480 ‌Nomura Asset Acceptance Corp., Series 2006-AF1, Class 1A2, 6.16%, 5/25/36, Callable 6/25/21 @ 100*(a) 27,527‌ 38,489 ‌Ocwen Residential MBS Corp., Series 1998-R1, Class B1, 3.43%, 10/25/40, Callable 6/25/21 @ 100*(a)(b) 29,697‌ 2‌ Residential Accredit Loans, Inc., Series 2003-QS18, Class A1, 5.00%, 9/25/18, Callable 6/25/21 @ 100* 2‌ 2,805 ‌Residential Accredit Loans, Inc., Series 2006-QS18, Class 3A3, 5.75%, 12/25/21, Callable 6/25/21 @ 100* 2,714‌ 10,119‌ Residential Accredit Loans, Inc., Series 2006-QS5, Class A9, 6.00%, 5/25/36, Callable 6/25/21 @ 100* 9,667‌ 26,013 ‌Residential Accredit Loans, Inc., Series 2006-QS12, Class 1A2, 6.50%, 9/25/36, Callable 6/25/21 @ 100* 17,736‌ 39,442 ‌Residential Asset Securitization Trust, Series 2005-A14, Class A5, 5.50%, 12/25/35, Callable 11/25/21 @ 100* 28,240‌ 43,302 ‌Residential Asset Securitization Trust, Series 2006-A8, Class 1A1, 6.00%, 8/25/36, Callable 11/25/26 @ 100* 35,165‌ 44,713 ‌Washington Mutual Mortgage Pass-Through Certificates, Series 2005-6, Class 1CB, 6.50%, 8/25/35, Callable 6/25/21 @ 100* 44,577‌ 509,218‌ See notes to the schedule of portfolio investments. - 7 - Schedule of Portfolio Investments Moderate Duration Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued Prime Adjustable Rate Mortgage Backed Securities (3.5%) $ 6,462‌ Bank of America Funding Corp., Series 2004-B, Class 5A1, 2.90%, 11/20/34, Callable 6/20/21 @ 100*(a) $ 6,489‌ 1,912 Bear Stearns Mortgage Trust, Series 2003-7, Class 4A, 2.72%, 10/25/33, Callable 6/25/21 @ 100*(a) 2,053‌ 4,607 Bear Stearns Mortgage Trust, Series 2004-9, Class 12A3, 2.85%, 11/25/34, Callable 6/25/21 @ 100*(a) 4,915‌ 10,900 Countrywide Home Loans, Series 2004-2, Class 2A1, 2.65%, 2/25/34, Callable 6/25/21 @ 100*(a) 10,394‌ 3,230‌ Countrywide Home Loans, Series 2004-12, Class 10A1, 3.04%, 8/25/34, Callable 6/25/21 @ 100*(a) 3,166‌ 10,535 HomeBanc Mortgage Trust, Series 2006-1, Class 1A1, 1.87%, 4/25/37, Callable 6/25/21 @ 100*(a) 9,475‌ 23,438‌ JPMorgan Mortgage Trust, Series 2005-A1, Class 3A4, 2.70%, 2/25/35, Callable 6/25/21 @ 100*(a) 23,198‌ 3,862‌ JPMorgan Mortgage Trust, Series 2006-A2, Class 2A1, 2.80% (US0003M + 101 bps), 4/25/36, Callable 7/25/21 @ 100* 3,808‌ 18,364 JPMorgan Mortgage Trust, Series 2006-A6, Class 1A4L, 3.33%, 10/25/36, Callable 6/25/21 @ 100*(a) 16,054‌ 197,485 JPMorgan Mortgage Trust, Series 2005-A6, Class 3A3, 3.39%, 9/25/35, Callable 6/25/21 @ 100*(a) 201,042‌ 281,352 LSTAR Securities Investment, Ltd., Series 2019-4, Class A1, 2.61% (US0001M + 150 bps), 5/1/24(b) 279,896‌ 100,000‌ Mello Warehouse Securitization Trust, Series 2020-2, Class C, 1.39% (US0001M + 130 bps), 11/25/53, Callable 12/25/23 @ 100*(b). 100,251‌ 260,221‌ WinWater Mortgage Loan Trust, Series 2014-1, Class A1, 3.85%, 6/20/44, Callable 1/20/22 @ 100*(a)(b) 263,431‌ 924,172‌ Prime Fixed Mortgage Backed Securities (5.8%) 3,833 American Home Mortgage Investment Trust, Series 2005-2, Class 5A1, 5.56%, 9/25/35, Callable 6/25/21 @ 100*(a)(c) 3,722‌ 257,574 Angel Oak Mortgage Trust, Series 2019-5, Class A1, 2.59%, 10/25/49, Callable 10/25/21 @ 100*(a)(b) 258,900‌ 13,909 Chase Mortgage Finance Corp., Series 2007-S2, Class 2A1, 5.50%, 3/25/37, Callable 6/25/21 @ 100* 9,137‌ 7,445‌ Citigroup Mortgage Loan Trust, Inc., Series 2005-1, Class 3A1, 6.50%, 4/25/35 7,851‌ 8,018‌ Citigroup Mortgage Loan Trust, Inc., Series 2004-NCM1, Class 1A3, 6.75%, 7/25/34, Callable 6/25/21 @ 100* 8,409‌ 3,469 Countrywide Alternative Loan Trust, Series 2003-J3, Class 2A1, 6.25%, 12/25/33, Callable 6/25/21 @ 100* 3,527‌ 1,851 Countrywide Home Loans, Series 2004-J6, Class 1A2, 5.25%, 8/25/24, Callable 6/25/21 @ 100* 1,857‌ Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued Prime Fixed Mortgage Backed Securities, continued: $ 7,503 ‌Countrywide Home Loans, Series 2005-29, Class A1, 5.75%, 12/25/35, Callable 6/25/21 @ 100* $ 5,476‌ 4,023‌ Credit Suisse First Boston Mortgage Securities Corp., Series 2004-1, Class 4A1, 5.00%, 12/31/99, Callable 6/25/21 @ 100* 4,104‌ 17,322‌ Credit Suisse First Boston Mortgage Securities Corp., Series 2003-27, Class 8A1, 6.00%, 11/25/33, Callable 6/25/21 @ 100* 18,020‌ 6,603‌ Credit Suisse First Boston Mortgage Securities Corp., Series 2003-8, Class 5A1, 6.50%, 4/25/33, Callable 6/25/21 @ 100* 6,862‌ 38,225‌ Flagstar Mortgage Trust, Series 2019-2, Class A3, 3.50%, 12/25/49, Callable 9/25/23 @ 100*(a)(b) 38,351‌ 50,274‌ Galton Funding Mortgage Trust, Series 2017-1, Class A21, 3.50%, 7/25/56, Callable 9/25/28 @ 100*(a)(b) 50,991‌ 255,724‌ GS Mortgage-Backed Securities Corp. Trust, Series 2020-PJ3, Class A14, 3.00%, 10/25/50, Callable 10/25/24 @ 100*(a)(b) 261,718‌ 162,256‌ GSR Mortgage Loan Trust, Series 2004-13F, Class 2A1, 4.25%, 11/25/34, Callable 6/25/21 @ 100* 163,881‌ 108‌ GSR Mortgage Loan Trust, Series 2004-10F, Class 2A4, 5.00%, 8/25/19, Callable 6/25/21 @ 100* 108‌ 827 GSR Mortgage Loan Trust, Series 2003-2F, Class 3A1, 6.00%, 3/25/32, Callable 6/25/21 @ 100* 870‌ 19,738 Morgan Stanley Mortgage Loan Trust, Series 2004-3, Class 3A, 6.00%, 4/25/34, Callable 2/25/24 @ 100* 21,009‌ 407,214 New Residential Mortgage Loan Trust, Series 2019-NQM3, Class A1, 2.80%, 7/25/49, Callable 6/25/21 @ 100*(a)(b) 409,633‌ 1,607 Prime Mortgage Trust, Series 2004-CL1, Class 1A1, 6.00%, 2/25/34, Callable 6/25/21 @ 100* 1,631‌ 36,032 Residential Asset Mortgage Products, Inc., Series 2005-SL2, Class A3, 7.00%, 2/25/32, Callable 7/25/31 @ 100* 33,841‌ 144,896‌ Sequoia Mortgage Trust, Series 2013-1, Class 2A1, 1.86%, 2/25/43, Callable 6/25/21 @ 100*(a)(b) 145,281‌ 64,606‌ Sequoia Mortgage Trust, Series 2017-2, Class A4, 3.50%, 2/25/47, Callable 3/25/23 @ 100*(a)(b) 64,743‌ 9,654‌ Structured Asset Mortgage Investments, Inc., Series 1999-2, Class 3A, 6.75%, 5/25/29, Callable 6/25/21 @ 100* 10,029‌ 88‌ Structured Asset Securities Corp., Series 1997-2, Class 2A4, 7.25%, 3/28/30, Callable 6/28/21 @ 100* 91‌ 942‌ Washington Mutual Mortgage Pass-Through Certificates, Series 2003-S11, Class 1A, 5.00%, 11/25/33, Callable 6/25/21 @ 100* 974‌ 589‌ Washington Mutual Mortgage Pass-Through Certificates, Series 2004-RA1, Class 2A, 7.00%, 3/25/34, Callable 5/25/28 @ 100* 628‌ 1,531,644‌ See notes to the schedule of portfolio investments. - 8 - Schedule of Portfolio Investments Moderate Duration Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued Subprime Mortgage Backed Securities (0.9%) $ 70,381‌ Towd Point Mortgage Trust, Series 2018-1, Class A1, 3.00%, 1/25/58, Callable 7/25/25 @ 100*(a)(b) $ 72,839 157,724‌ Towd Point Mortgage Trust, Series 2018-2, Class A1, 3.25%, 3/25/58, Callable 11/25/25 @ 100*(a)(b) 164,020 236,859‌ U.S. Government Agency Mortgage Backed Securities (9.5%) 33,117‌ Fannie Mae, Series 2013-68, Class 10A1, 1.00%, 3/25/42 32,780 58‌ Fannie Mae, Series 1992-45, Class F, 1.30% (T7Y), 4/25/22 58 180,886‌ Fannie Mae, Series 2012-30, Class BA, 2.00%, 6/25/41 186,900 104,779‌ Fannie Mae, Series 2012-8, Class KA, 2.00%, 6/25/41 107,334 37,410‌ Fannie Mae, Series 2013-18, Class 10A1, 2.00%, 12/25/42 38,441 1,534‌ Fannie Mae, 2.20% (US0012M + 162 bps), 9/1/33, Pool #739372 1,547 1,863‌ Fannie Mae, 2.23% (US0012M + 186 bps), 1/1/37, Pool #906675 1,866 62,616‌ Fannie Mae, Series 2013-74, Class 10A1, 2.25%, 6/25/42(a) 64,823 90,208‌ Fannie Mae, Series 2010-100, Class LA, 2.50%, 7/25/40 94,145 96,814‌ Fannie Mae, Series 2014-61, Class P, 2.50%, 7/25/44 101,418 103,643‌ Fannie Mae, Series 2015-12, Class PC, 2.50%, 7/25/44 105,922 194,131‌ Fannie Mae, Series 2017-M5, Class A1, 2.74%, 4/25/29 207,714 90,382‌ Fannie Mae, Series 2011-118, Class 10A1, 3.00%,11/25/41 96,858 168,431‌ Fannie Mae, Series 2015-59, Class LM, 3.00%, 7/25/45 178,491 226,637‌ Fannie Mae, Series 2018-M12, Class A1, 3.55%, 2/25/30 253,771 115‌ Fannie Mae, 6.00%, 4/1/35, Pool #735503 133 769‌ Fannie Mae, Series 2001-55, Class PC, 6.50%, 10/25/31 898 10,413‌ Fannie Mae, Series 2003-W2, Class 1A2, 7.00%, 7/25/42, Callable 6/25/21 @ 100* 12,532 402‌ Fannie Mae, Series 2002-T1, Class A3, 7.50%, 11/25/31, Callable 6/25/21 @ 100* 470 196‌ Fannie Mae, Series 1992-31, Class M, 7.75%, 3/25/22 200 8‌ Fannie Mae, Series G-32, Class L, 8.00%, 10/25/21 9 1‌ Fannie Mae, Series G-32, Class N, 8.10%, 10/25/21 1 15‌ Freddie Mac, Series 1222, Class P, 1.20% (T10Y - 40 bps), 3/15/22, Callable 7/15/21 @ 100* 14 20,340‌ Freddie Mac, Series 4146, Class 10A1, 1.50%, 10/15/42 20,772 96,918 Freddie Mac, Series 4220, Class KC, 1.50%, 5/15/32 99,292 28,629‌ Freddie Mac, Series 3936, Class LA, 2.00%, 6/15/40 28,849 Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued U.S. Government Agency Mortgage Backed Securities, continued: $ 93,474‌ Freddie Mac, Series 4076, Class QC, 2.00%, 11/15/41 $ 95,549‌ ‌103,181‌ Freddie Mac, Series 4408, Class GA, 2.00%, 9/15/41 106,046‌ 70,593‌ ‌ Freddie Mac, Series 4461, Class EA, 2.00%, 7/15/37 72,492‌ 239,611‌ Freddie Mac, Series 3908, Class B, 2.50%, 6/15/39 252,159‌ 58,658‌ ‌ Freddie Mac, Series 4312, Class 10A1, 2.50%, 12/15/41 60,595‌ 81,894‌ ‌ Freddie Mac, Series 4316, Class JY, 3.00%, 1/15/44 87,236‌ 37,949‌ ‌ Freddie Mac, Series 4332, Class NH, 3.00%, 9/15/43 38,815‌ 10,630‌ ‌ Freddie Mac, 5.37% (H15T1Y + 228 bps), 8/1/34, Pool #755230 10,747‌ 62‌ ‌ Freddie Mac, Series 1136, Class H, 6.00%, 9/15/21, Callable 7/15/21 @ 100* 63‌ 469‌ ‌ Freddie Mac, Series 1379, Class H, 7.00%, 10/15/22, Callable 7/15/21 @ 100* 483‌ 689‌ ‌ Freddie Mac, Series 1714, Class K, 7.00%, 4/15/24, Callable 7/15/21 @ 100* 735‌ 978‌ ‌ Freddie Mac, Series 1904, Class D, 7.50%, 10/15/26, Callable 7/15/21 @ 100* 1,097‌ 10‌ ‌ Freddie Mac, Series 1119, Class H, 7.75%, 8/15/21, Callable 7/15/21 @ 100* 10‌ 407‌ ‌ Freddie Mac, Series 1281, Class I, 8.00%, 5/15/22, Callable 7/15/21 @ 100* 415‌ 769‌ ‌ Freddie Mac, Series 1310, Class J, 8.00%, 6/15/22, Callable 7/15/21 @ 100* 790‌ 3,065‌ ‌ Government National Mortgage Assoc., Series 2013-104, Class DC, 2.00%, 4/20/40 3,087‌ 73,732‌ ‌ Government National Mortgage Assoc., Series 2013-69, 2.00%, 9/20/42 76,519‌ 14,703‌ ‌ Government National Mortgage Assoc., Series 2010-69, Class MC, 2.50%, 4/20/40 14,800‌ 8,775‌ ‌ Government National Mortgage Assoc., Series 2010-98, Class CH, 3.00%, 10/20/39 8,846‌ ‌25,511‌ Government National Mortgage Assoc., Series 2010-98, Class MG, 3.00%, 8/20/39 26,077‌ ‌4,476‌ Government National Mortgage Assoc., 7.00%, 3/15/26, Pool #419128 4,495‌ ‌55‌ Government National Mortgage Assoc., 7.00%, 3/20/27, Pool #2394 61‌ ‌501‌ Government National Mortgage Assoc., 8.00%, 5/15/23, Pool #343406 503‌ ‌281‌ Government National Mortgage Assoc., 8.00%, 10/20/24, Pool #1884 298‌ ‌38‌ Government National Mortgage Assoc., 8.00%, 2/20/26, Pool #2171 42‌ ‌15‌ Government National Mortgage Assoc., 8.00%, 3/20/26, Pool #2187 15‌ ‌1,065‌ Government National Mortgage Assoc., 8.00%, 4/20/26, Pool #2205 1,150‌ ‌3,146‌ Government National Mortgage Assoc., 8.00%, 5/20/26, Pool #2219 3,440‌ ‌ 2,501,803 Total Mortgage Backed Securities (Cost $5,778,895) 5,836,397 See notes to the schedule of portfolio investments. - 9 - Schedule of Portfolio Investments Moderate Duration Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Corporate Bonds (27.9%) Aerospace & Defense (1.8%) $ 450,000‌ Boeing Co. (The), 3.25%, 2/1/28, Callable 12/1/27 @ 100* $ 473,835‌ Airlines (1.0%) 247,429‌ United Airlines Pass Through Trust, Series 2020-1, Class A, 5.88%, 4/15/29 273,489‌ Banks (3.2%) 510,000‌ Bank of America Corp., 3.55% (US0003M + 78 bps), 3/5/24, Callable 3/5/23 @ 100 * 537,960‌ 290,000‌ Wells Fargo & Co., 3.00%, 10/23/26 314,471‌ 852,431‌ Beverages (1.0%) 240,000‌ PepsiCo, Inc., 2.75%, 3/19/30, Callable 12/19/29 @ 100* 255,994‌ Capital Markets (1.2%) 290,000‌ Goldman Sachs Group, Inc., 3.50%, 11/16/26, Callable 11/16/25 @ 100 * 316,962‌ Diversified Financial Services (1.2%) 300,000‌ National Rural Utilities Cooperative Finance Corp., 3.25%, 11/1/25, Callable 8/1/25 @ 100 * 326,226‌ Electric Utilities (1.1%) 275,000‌ Entergy Mississippi LLC, 3.25%, 12/1/27, Callable 9/1/27 @ 100 * 300,246‌ Entertainment (2.1%) 215,000‌ The Walt Disney Co., 2.00%, 9/1/29, Callable 6/1/29 @ 100* 214,109‌ 300,000‌ Walt Disney Co. (The), 3.35%, 3/24/25 327,238‌ 541,347‌ Equity Real Estate Investment Trusts (0.5%) 136,851 ‌ JBG/Rockville NCI Campus LLC, Series 2010-A, 3.90%, 7/15/23 (b) 139,666‌ Food Products (1.2%) 300,000‌ Mars, Inc., 3.20%, 4/1/30, Callable 1/1/30 @ 100 *(b) 325,351‌ Health Care Providers & Services (2.5%) 225,000‌ Ascension Health, Series B, 2.53%, 11/15/29, Callable 8/15/29 @ 100 * 233,407‌ 370,000‌ Sutter Health, 3.70%, 8/15/28, Callable 5/15/28 @ 100* 409,005‌ 642,412‌ Hotels, Restaurants & Leisure (1.8%) 425,000‌ Hyatt Hotels Corp., 4.38%, 9/15/28, Callable 6/15/28 @ 100* 463,784‌ Household Durables (1.7%) 400,000 Harman International Industries, Inc., 4.15%, 5/15/25, Callable 2/15/25 @ 100 * 440,784‌ Insurance (1.2%) 300,000‌ Jackson National Life Global Funding, 2.65%, 6/21/24 (b) 316,073‌ Internet & Direct Marketing Retail (1.4%) 335,000‌ Expedia Group, Inc., 3.80%, 2/15/28, Callable 11/15/27 @ 100* 361,138‌ Oil, Gas & Consumable Fuels (1.5%) 380,000‌ HollyFrontier Corp., 2.63%, 10/1/23 392,815‌ Semiconductors & Semiconductor Equipment (2.0%) 460,000‌ Broadcom, Inc., 4.75%, 4/15/29, Callable 1/15/29 @ 100* 526,489‌ Technology Hardware, Storage & Peripherals (1.5%) 350,000‌ Apple, Inc., 3.20%, 5/11/27, Callable 2/11/27 @ 100* 386,700‌ Total Corporate Bonds (Cost $7,176,163) 7,335,742‌ Shares or Principal Amount Security Description Value Taxable Municipal Bonds (18.1%) Alabama (1.2%) $ 300,000‌ The Water Works Board City of Birmingham Revenue, 2.60%, 1/1/27 $ 322,743‌ California (2.4%) 600,000‌ Riverside Unified School District, GO, 2.27%, 2/1/25 635,276‌ Colorado (1.1%) 150,000‌ Colorado Housing and Finance Authority Revenue, Series I-1, Class I, 0.86%, 11/1/23, GNMA: GOV. NATL MTGE ASSOCIATION 150,950‌ 150,000‌ Colorado Housing and Finance Authority Revenue, Series I-1, Class I, 1.11%, 5/1/25, GNMA: GOV. NATL MTGE ASSOCIATION 150,666‌ 301,616‌ Michigan (1.1%) 300,000‌ River Rouge School District, GO, 1.89%, 5/1/30, Insured by: Q-SBLF 294,738‌ New York (2.4%) 300,000‌ New York City Housing Development Corp. Revenue, Series L, 2.84%, 11/1/28, Continuously Callable @ 100 315,345‌ 300,000 New York City Transitional Finance Authority Revenue, 2.63%, 11/1/29 318,285‌ 633,630‌ Rhode Island (1.6%) 400,000‌ Rhode Island Convention Center Authority Revenue, 3.15%, 5/15/25 412,142‌ Texas (3.1%) 500,000‌ Austin Community College District Revenue, 0.93%, 2/1/25 498,875‌ 300,000‌ Midland County Fresh Water Supply District No. 1 Revenue, 2.37%, 9/15/26 310,570‌ 809,445‌ Utah (1.1%) 300,000‌ Utah Transit Authority Revenue, 2.04%, 12/15/31, Continuously Callable @ 100 299,741‌ Virginia (1.1%) 275,000‌ Virginia Housing Development Authority Revenue, Series F, 1.65%, 7/1/26, HUD: US DEPT OF HSG AND URBAN DEV 279,589‌ Washington (1.2%) 300,000‌ Pierce County School District No 10 Tacoma, GO, 0.53%, 12/1/23, SCH BD GTY 302,002‌ Wisconsin (1.8%) 465,000‌ Public Financial Authority Wisconsin Revenue, 4.45%, 10/1/25, Insured by: AGC 482,951‌ Total Taxable Municipal Bonds (Cost $4,662,970) 4,773,873‌ U.S. Government Agency Securities (2.1%) Federal Home Loan Banks 275,000‌ 0.65%, 4/28/26, Callable 7/28/21 @ 100 *(a) 275,098‌ 285,000 1.30%, 3/17/27, Callable 6/17/21 @ 100* 284,306 Total U.S. Government Agency Securities (Cost $560,000) 559,404 U.S. Treasury Obligations (13.2%) U.S. Treasury Notes 1,943,000‌ 2.00%, 4/30/24 2,039,239‌ 1,332,000‌ 2.25%, 2/15/27 1,426,229‌ Total U.S. Treasury Obligations (Cost $3,455,057) 3,465,468‌ See notes to the schedule of portfolio investments. - 10 - Schedule of Portfolio Investments Moderate Duration Fund May 31, 2021 (Unaudited) Concluded Shares or Principal Amount Security Description Value Investment in Affiliates (4.3%) 1,118,444 Cavanal Hill Government Securities Money Market Fund, Select Shares, 0.1%(d) $ 1,118,444 Total Investment in Affiliates (Cost $1,118,444) 1,118,444 Total Investments (Cost $25,865,072) - 99.7% 26,222,268 Other assets in excess of liabilities — 0.3% 88,477 Net Assets - 100.0% $ 26,310,745 (a) The rate for certain asset-backed and mortgage-backed securities may vary based on factors relating to the pool of assets underlying the security. The rate presented is the rate in effect at May 31, 2021. (b) Represents a restricted security, purchased under Rule 144A, Section 4(2), which is exempt from registration under the Securities Act of 1933, as amended. The security has been deemed liquid according to the policies and procedures adopted by the Board of Trustees. (c) Step Bond: Coupon rate is set for an initial period and then increased to a higher coupon rate at a specified date. The rate shown is the rate in effect at May 31, 2021. (d) Money market investment. The rate presented on the Schedule of Portfolio Investments is the rate in effect at May 31, 2021. * Represents next call date. Additional subsequent call dates and amounts may apply to this security. † Mortgage backed securities are classified based on the characteristics of their underlying collateral, the fixed vs. variable nature of the obligations, and the credit standing of the mortgagors. The fixed or variable rate nature of securities interest payments to which the fund is entitled may not coincide with the payment nature of the collateral underlying the securities. AGC Assured Guaranty Corporation GNMA Government National Mortgage Association GO General Obligation H15T1Y 1 Year Treasury Constant Maturity Rate LIBOR London Interbank Offered Rate Q-SBLF Qualified School Bond Loan Fund SCH BD GTY School Board Guaranty T10Y 10 Year Treasury Constant Maturity Rate T7Y 7 Year Treasury Constant Maturity Rate US0001M 1 Month US Dollar LIBOR US0003M 3 Month US Dollar LIBOR US0012M 12 Month US Dollar LIBOR See notes to the schedule of portfolio investments. - 11 - Schedule of Portfolio Investments Bond Fund May 31, 2021 (Unaudited) Shares or Principal Amount Security Description Value Asset Backed Securities (8.9%) $ 679,809 Bayview Opportunity Master Fund IVb Trust, Series 2017-SPL4, Class A, 3.50%, 1/28/55, Callable 7/28/21 @ 100*(a)(b) $ 697,766‌ 20,931 Bear Stearns Asset Backed Securities, Inc., Series 2003-AC7, Class A1, 5.50%, 1/25/34, Callable 6/25/21 @ 100*(a)(c) 21,230 634,280 ‌BRE Grand Islander Timeshare Issuer LLC, Series 2019-A, Class B, 3.78%, 9/26/33, Callable 4/25/26 @ 100*(b) 661,781 967,500 DB Master Finance LLC, Series 2017-1A, Class A2I, 3.63%, 11/20/47, Callable 11/20/21 @ 100*(b) 981,819‌ 838,062 Longtrain Leasing III LLC, Series 2015-1A, Class A2, 4.06%, 1/15/45, Callable 1/15/25 @ 100*(b) 852,207‌ 31 RAAC, Series 2004-SP1, Class AI4, 5.29%, 8/25/27, Callable 6/25/21 @ 100*(a) 31 415,000 Sabey Data Center Issuer LLC, Series 2020-1, Class A2, 3.81%, 3/20/45, Callable 11/20/23 @ 100*(b) 442,399‌ 928,625‌ Stack Infrastructure Issuer LLC, Series 2019-1A, Class A2, 4.54%, 2/25/44, Callable 2/25/23 @ 100*(b) 986,781 31,706‌ Structured Asset Securities Corp., Series 2003-AL2, Class A, 3.36%, 1/25/31, Callable 6/25/21 @ 100*(b) 31,640‌ 937,542 Textainer Marine Containers VIII, Ltd., Series 2AA, Class A, 2.10%, 9/20/45, Callable 9/20/22 @ 100*(b) 949,676‌ 1,022,875 TIF Funding II LLC, Series 2021-1A, Class A, 1.65%, 2/20/46, Callable 2/20/23 @ 100*(b) 1,005,290‌ 985,833‌ Triton Container Finance VIII LLC, Series 2021-1A, Class A, 1.86%, 3/20/46, Callable 4/20/23 @ 100*(b) 977,628‌ 500,000 TRP-TRIP Rail Master Funding LLC, Series 2021-2, Class A, 2.15%, 6/19/51, Callable 6/17/22 @ 100*(b) 500,575‌ 280,200‌ UBS Commercial Mortgage Trust, Series 2018-C10, Class A1, 3.18%, 5/15/51, Callable 3/15/23 @ 100* 286,576‌ 600,000 Willis Engine Structured Trust VI, Series 2021-A, Class A, 3.10%, 5/15/46, Callable 5/15/29 @ 100* 599,969‌ 530,000 ZAXBY'S Funding LLC, Series 2021-1A, Class A2, 3.24%, 7/30/51, Callable 7/30/25 @ 100*(b) 530,000‌ Total Asset Backed Securities (Cost $9,447,283) 9,525,368‌ Mortgage Backed Securities† (17.1%) Alt-A - Adjustable Rate Mortgage Backed Securities (0.5%) 424,611‌ Bear Stearns Alternative-A Trust, Series 2005-7, Class 11A1, 0.65% (US0001M + 54 bps), 8/25/35, Callable 6/25/21 @ 100 428,107‌ 62,949 ‌Bear Stearns Alternative-A Trust, Series 2006-6, Class 32A1, 3.07%, 11/25/36, Callable 5/25/22 @ 100*(a) 42,093 7,164 JPMorgan Alternative Loan Trust, Series 2006-S4, Class A6, 5.71%, 12/25/36, Callable 6/25/21 @ 100*(a)(c) 7,264‌ 477,464‌ Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued Alt-A - Fixed Rate Mortgage Backed Securities (0.7%) $ 11,380 Bank of America Alternative Loan Trust, Series 2006-4, Class CB1, 6.50%, 5/25/46, Callable 6/25/21 @ 100* $ 11,367‌ 32,497‌ Chaseflex Trust, Series 2005-2, Class 1A1, 6.00%, 6/25/35, Callable 6/25/21 @ 100* 28,813‌ 22,511‌ Chaseflex Trust, Series 2007-1, Class 1A3, 6.50%, 2/25/37, Callable 6/25/21 @ 100* 12,016‌ 53,951 Countrywide Alternative Loan Trust, Series 2005- 46CB, Class A3, 5.50%, 10/25/35, Callable 6/25/21 @ 100* 49,862‌ 7,165‌ Countrywide Alternative Loan Trust, Series 2006-8T1, Class 2A3, 5.50%, 4/25/36, Callable 6/25/21 @ 100* 6,827‌ 8,062‌ Countrywide Alternative Loan Trust, Series 2004-22CB, Class 1A1, 6.00%, 10/25/34, Callable 6/25/21 @ 100* 8,314‌ 25,324‌ Countrywide Alternative Loan Trust, Series 2006-8T1, Class 1A4, 6.00%, 4/25/36, Callable 6/25/21 @ 100* 17,636‌ 165,817 Countrywide Alternative Loan Trust, Series 2007-9T1, Class 1A7, 6.00%, 5/25/37, Callable 6/25/21 @ 100* 109,597‌ 185,807 Countrywide Alternative Loan Trust, Series 2006-36T2, Class 2A4, 6.25%, 12/25/36, Callable 10/25/27 @ 100* 118,479‌ 3,376‌ Master Alternative Loans Trust, Series 2003-8, Class 3A1, 5.50%, 12/25/33, Callable 6/25/21 @ 100* 3,402‌ 2,608‌ Master Alternative Loans Trust, Series 2004-13, Class 8A1, 5.50%, 1/25/25, Callable 6/25/21 @ 100* 2,414‌ 18,430‌ Master Alternative Loans Trust, Series 2005-3, Class 1A1, 5.50%, 4/25/35, Callable 8/25/22 @ 100* 18,660‌ 45,000 Master Alternative Loans Trust, Series 2004-3, Class 3A1, 6.00%, 4/25/34, Callable 6/25/21 @ 100* 45,583‌ 38,969‌ Master Alternative Loans Trust, Series 2004-6, Class 10A1, 6.00%, 7/25/34, Callable 6/25/21 @ 100* 40,621‌ 19,629‌ Master Alternative Loans Trust, Series 2004-6, Class 7A1, 6.00%, 7/25/34, Callable 6/25/21 @ 100* 20,453‌ 17,492‌ Master Alternative Loans Trust, Series 2005-3, Class 7A1, 6.00%, 4/25/35, Callable 12/25/21 @ 100* 17,260‌ 2,018‌ Master Alternative Loans Trust, Series 2003-7, Class 5A1, 6.25%, 11/25/33, Callable 6/25/21 @ 100* 2,092‌ 9,364‌ Master Alternative Loans Trust, Series 2004-3, Class 2A1, 6.25%, 4/25/34, Callable 6/25/21 @ 100* 9,498‌ 14,456‌ Residential Accredit Loans, Inc., Series 2006-QS5, Class A9, 6.00%, 5/25/36, Callable 6/25/21 @ 100* 13,810‌ 191,552‌ Residential Asset Securitization Trust, Series 2005-A9, Class A3, 5.50%, 7/25/35, Callable 6/25/21 @ 100* 154,256‌ See notes to the schedule of portfolio investments. - 12 - Schedule of Portfolio Investments Bond Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued Alt-A - Fixed Rate Mortgage Backed Securities, continued: $ 117,584‌ Residential Asset Securitization Trust, Series 2006-A2, Class A3, 6.00%, 5/25/36, Callable 3/25/22 @ 100* $ 70,130‌ Prime Adjustable Rate Mortgage Backed Securities (2.3%) 761,090‌ 4,653 JPMorgan Mortgage Trust, Series 2006-A4, Class 3A1, 2.97%, 6/25/36, Callable 6/25/21 @ 100*(a) 3,896‌ 140,524‌ JPMorgan Mortgage Trust, Series 2005-A6, Class 2A4, 3.01%, 8/25/35, Callable 6/25/21 @ 100*(a) 142,278‌ 1,339,770‌ LSTAR Securities Investment, Ltd., Series 2019-4, Class A1, 2.61% (US0001M + 150 bps), 5/1/24(b) 1,332,839‌ 500,000‌ Mello Warehouse Securitization Trust, Series 2021-1, Class A, 0.81% (US0001M + 70 bps), 2/25/55, Callable 2/25/24 @ 100*(b) 500,596‌ 150,000 Mello Warehouse Securitization Trust, Series 2021-1, Class 21-C, 1.21% (US0001M + 110 bps), 2/25/55, Callable 2/25/24 @ 100*(b) 150,411‌ 270,000‌ Mello Warehouse Securitization Trust, Series 2020-2, Class C, 1.39% (US0001M + 130 bps), 11/25/53, Callable 12/25/23 @ 100*(b) 270,676‌ 15,360‌ MLCC Mortgage Investors, Inc., Series 2004-HB1, Class A3, 1.94%, 4/25/29, Callable 6/25/21 @ 100*(a) 15,050‌ 4,363‌ Structured Adjustable Rate Mortgage Loan Trust, Series 2006-5, Class 4A1, 2.75%, 6/25/36, Callable 6/25/21 @ 100*(a) 3,437‌ Prime Fixed Mortgage Backed Securities (3.4%) 2,419,183‌ 2,882‌ Chase Mortgage Finance Corp., Series 2002-S4, Class A23, 6.25%, 3/25/32, Callable 6/25/21 @ 100* 2,347‌ 130,175‌ Chaseflex Trust, Series 2006-2, Class A5, 4.51%, 9/25/36, Callable 8/25/22 @ 100*(a) 131,168‌ 20,247‌ Citigroup Mortgage Loan Trust, Inc., Series 2005-1, Class 3A1, 6.50%, 4/25/35 21,352‌ 2,000‌ Countrywide Home Loans, Series 2004-8, Class 1A3, 5.50%, 7/25/34, Callable 6/25/21 @ 100* 2,009‌ 34,352 Countrywide Home Loans, Series 2005-J1, Class 1A8, 5.50%, 2/25/35, Callable 6/25/21 @ 100* 34,815‌ 4,377‌ Countrywide Home Loans, Series 2004-18, Class A1, 6.00%, 10/25/34, Callable 6/25/21 @ 100* 4,517‌ 4,752‌ Countrywide Home Loans, Series 2004-21, Class A10, 6.00%, 11/25/34, Callable 6/25/21 @ 100* 4,950‌ 77,059‌ Countrywide Home Loans, Series 2007-J3, Class A10, 6.00%, 7/25/37, Callable 6/25/21 @ 100 50,347‌ 95,576‌ Credit Suisse First Boston Mortgage Securities Corp., Series 2005-9, Class 3A1, 6.00%, 10/25/35, Callable 6/25/21 @ 100* 43,142‌ 11‌ Credit Suisse Mortgage Capital Certificates, Series 2006-8, Class 1A1, 4.50%, 10/25/21, Callable 6/25/21 @ 100* 11‌ 113‌ First Nationwide Trust, Series 2001-3, Class 1A1, 6.75%, 8/21/31 118‌ Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued Prime Fixed Mortgage Backed Securities, continued: $ 127,418 Flagstar Mortgage Trust, Series 2019-2, Class A3, 3.50%, 12/25/49, Callable 9/25/23 @ 100*(a)(b) $ 127,836‌ 1,677 GMAC Mortgage Corp. Loan Trust, Series 2003- GH2, Class A4, 5.50%, 10/25/33, Callable 6/25/21 @ 100*(a)(c) 1,721‌ 17,983 JPMorgan Mortgage Trust, Series 2006-A2, Class 3A2, 2.72%, 4/25/36, Callable 7/25/21 @ 100*(a) 16,565‌ 22,328 JPMorgan Mortgage Trust, Series 2004-S2, Class 4A5, 6.00%, 11/25/34, Callable 6/25/21 @ 100* 22,316‌ 1,000,000 Mello Mortgage Capital Acceptance Trust, Series 2021-MTG2, Class A10, 2.50%, 6/1/51(a)(b) 1,023,594‌ 24,762‌ Morgan Stanley Mortgage Loan Trust, Series 2004-3, Class 3A, 6.00%, 4/25/34, Callable 2/25/24 @ 100* 26,357‌ 650,633 New Residential Mortgage Loan Trust, Series 2019-NQM3, Class A1, 2.80%, 7/25/49, Callable 6/25/21 @ 100*(a)(b) 654,497‌ 4,294 Nomura Asset Acceptance Corp., Series 2003-A1, Class A2, 6.00%, 5/25/33, Callable 6/25/21 @ 100* 4,333‌ 115,251‌ RAAC, Series 2004-SP2, Class A22, 6.00%, 1/25/32, Callable 6/25/21 @ 100* 115,632‌ 331,191‌ Sequoia Mortgage Trust, Series 2013-1, Class 2A1, 1.86%, 2/25/43, Callable 6/25/21 @ 100*(a)(b) 332,071‌ 36,782 TBW Mortgage Backed Pass-Through Certificates, Series 2006-2, Class 7A1, 7.00%, 7/25/36, Callable 6/25/21 @ 100* 7,585‌ 207,005‌ Washington Mutual Mortgage Pass-Through Certificates, Series 2005-3, Class 1CB5, 5.50%, 5/25/35, Callable 6/25/21 @ 100* 206,127‌ 5,566 Washington Mutual Mortgage Pass-Through Certificates, Series 2004-CB1, Class 4A, 6.00%, 6/25/34, Callable 6/25/21 @ 100* 5,851‌ 52,943 Washington Mutual Mortgage Pass-Through Certificates, Series 2004-RA1, Class 2A, 7.00%, 3/25/34, Callable 5/25/28 @ 100* 56,358‌ 223,681 Wells Fargo Mortgage Backed Securities Trust, Series 2019-4, Class A3, 3.43%, 9/25/49, Callable 12/25/22 @ 100*(a)(b) 224,122‌ 224,668‌ Wells Fargo Mortgage Backed Securities Trust, Series 2019-3, Class A1, 3.50%, 7/25/49, Callable 7/25/22 @ 100*(a)(b) 228,492‌ 213,600‌ WinWater Mortgage Loan Trust, Series 2015-1, Class A1, 3.50%, 1/20/45, Callable 9/20/21 @ 100*(a)(b) 217,038‌ 3,565,271‌ Subprime Mortgage Backed Securities (1.0%) 418,282 Towd Point Mortgage Trust, Series 2017-6, Class A1, 2.75%, 10/25/57, Callable 7/25/24 @ 100*(a)(b) 430,150‌ 187,682 Towd Point Mortgage Trust, Series 2018-1, Class A1, 3.00%, 1/25/58, Callable 7/25/25 @ 100*(a)(b) 194,236‌ 446,886‌ Towd Point Mortgage Trust, Series 2018-2, Class A1, 3.25%, 3/25/58, Callable 11/25/25 @ 100*(a)(b) 464,724‌ 1,089,110‌ See notes to the schedule of portfolio investments. - 13 - Schedule of Portfolio Investments Bond Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued U.S. Government Agency Mortgage Backed Securities (9.2%) $ 150,222‌ Fannie Mae, Series 2010-102, Class PE, 2.00%, 9/25/40 $ 154,771‌ 271,711‌ Fannie Mae, Series 2012-111, Class EC, 2.00%, 12/25/41 279,826‌ 427,616‌ Fannie Mae, Series 2012-30, Class BA, 2.00%, 6/25/41 441,831‌ 414,486‌ Fannie Mae, Series 2012-83, Class AH, 2.00%, 11/25/41 425,474‌ 202,014‌ Fannie Mae, Series 2013-18, Class 10A1, 2.00%, 12/25/42 207,579‌ 177,980‌ Fannie Mae, Series 2013-23, Class AB, 2.00%, 2/25/43 184,544‌ 662,242‌ Fannie Mae, Series 2020-54, Class TA, 2.00%, 5/25/43 681,055‌ 238,110‌ Fannie Mae, Series 2012-30, Class CB, 2.25%, 10/25/41 246,634‌ 78,270‌ Fannie Mae, Series 2013-74, Class 10A1, 2.25%, 6/25/42(a) 81,029‌ 10,375‌ Fannie Mae, 2.43% (H15T1Y + 231 bps), 12/1/27, Pool #422279 10,448‌ 230,106‌ Fannie Mae, Series 2, Class JD, 2.50%, 2/25/50 235,863‌ 150,742‌ Fannie Mae, Series 2010-100, Class LA, 2.50%, 7/25/40 157,321‌ 227,596‌ Fannie Mae, Series 2012-111, Class QC, 2.50%, 5/25/42 237,409‌ 72,610‌ Fannie Mae, Series 2014-61, Class P, 2.50%, 7/25/44 76,063‌ 717,592‌ Fannie Mae, Series 2017-M5, Class A1, 2.74%, 4/25/29 767,801‌ 97,710‌ Fannie Mae, Series 2011-118, Class 10A1, 3.00%,11/25/41 104,711‌ 376,522‌ Fannie Mae, Series 2014-33, Class PE, 3.00%, 4/25/43 394,308‌ 85,409‌ Fannie Mae, Series 2014-72, Class KA, 3.00%, 10/25/44 90,227‌ 338,041‌ Fannie Mae, Series 2015-59, Class LM, 3.00%, 7/25/45 358,230‌ 770,567‌ Fannie Mae, Series 2018-M12, Class A1, 3.55%, 2/25/30 862,820‌ 915,912‌ Fannie Mae, Series 2018-M13, Class A1, 3.70%, 3/25/30(a) 1,039,425‌ 25,069 Fannie Mae, Series 2012-16, Class K, 4.00%, 10/25/41 26,858‌ 14,210‌ Fannie Mae, Series 2002-W11, Class AF5, 4.98%, 11/25/32, Callable 6/25/21 @ 100*(a)(c) 15,241‌ 242‌ Fannie Mae, 5.00%, 8/1/33, Pool #730856 276‌ 126‌ Fannie Mae, 5.00%, 7/1/35, Pool #832198 145‌ 188‌ Fannie Mae, 5.50%, 2/1/33, Pool #683351 217‌ 108‌ Fannie Mae, 5.50%, 9/1/34, Pool #725773 126‌ 1,524‌ Fannie Mae, Series 1998-36, Class ZB, 6.00%, 7/18/28 1,704‌ 2,036‌ Fannie Mae, Series 1993-82, Class H, 7.00%, 5/25/23 2,125‌ 574‌ Fannie Mae, Series 1991-171, Class J, 8.00%, 12/25/21 581‌ 28,322‌ Fannie Mae Whole Loan, Series 2003-W6, Class 6A, 3.36%, 8/25/42, Callable 6/25/21 @ 100*(a) 29,556‌ Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued U.S. Government Agency Mortgage Backed Securities, continued: $ 44,748‌ Freddie Mac, Series 4146, Class 10A1, 1.50%, 10/15/42 $ 45,699 57,257‌ Freddie Mac, Series 3936, Class LA, 2.00%, 6/15/40 57,698‌ 40,915‌ Freddie Mac, Series 3997, Class AE, 2.00%, 4/15/40 41,203 127,015‌ Freddie Mac, Series 4019, Class GB, 2.00%, 12/15/41 131,379‌ 117,655‌ Freddie Mac, Series 4461, Class EA, 2.00%, 7/15/37 120,821 3,044‌ Freddie Mac, 2.25% (H15T1Y + 213 bps), 4/1/24, Pool #409624 3,053‌ 364,925‌ Freddie Mac, Series 3913, Class PC, 2.50%, 3/15/41 374,474‌ 112,075‌ Freddie Mac, Series 4009, Class PK, 2.50%, 6/15/41, Callable 10/15/31 @ 100* 116,379‌ 250,240‌ Freddie Mac, Series 4312, Class 10A1, 2.50%, 12/15/41 258,502‌ 122,841‌ Freddie Mac, Series 4316, Class JY, 3.00%, 1/15/44 130,854‌ 206,188‌ Freddie Mac, Series 4348, Class A, 3.00%, 6/15/39 218,826‌ 140,909‌ Freddie Mac, Series 3721, Class PE, 3.50%, 9/15/40 151,955‌ 52,562‌ Freddie Mac, Series 3780, Class MK, 3.50%, 10/15/40 56,595‌ 681‌ Freddie Mac, Series 2610, Class VB, 5.50%, 7/15/24 722‌ 205‌ Freddie Mac, 6.00%, 7/1/35, Pool #A36085 231‌ 1,325‌ Freddie Mac, Series 2148, Class ZA, 6.00%, 4/15/29 1,496‌ 782‌ Freddie Mac, 6.50%, 2/1/36, Pool #G08113 926‌ 9,491‌ Freddie Mac, Series 2036, Class PD, 6.50%, 3/15/28 10,722‌ 473‌ Freddie Mac, Series 2278, Class H, 6.50%, 1/15/31 518‌ 430‌ Freddie Mac, Series 1281, Class I, 8.00%, 5/15/22, Callable 7/15/21 @ 100* 438‌ 159,752‌ Government National Mortgage Assoc., Series 2013-69, 2.00%, 9/20/42 165,792‌ 338,911‌ Government National Mortgage Assoc., Series 2009-94, Class KB, 3.00%, 9/16/39 358,095‌ 133,562‌ Government National Mortgage Assoc., Series 2011-46, Class GJ, 3.25%, 1/16/41(a) 143,717‌ 247,112‌ Government National Mortgage Assoc., Series 2019-85, Class MP, 3.50%, 6/20/49 257,060‌ 21,393‌ Government National Mortgage Assoc., Series 2009-93, Class HG, 4.00%, 9/16/39 22,816‌ 1,206‌ Government National Mortgage Assoc., 7.00%, 9/15/23, Pool #347688 1,222‌ 7,548‌ Government National Mortgage Assoc., 7.00%, 7/15/29, Pool #490215 8,420‌ 2,548‌ Government National Mortgage Assoc., 7.50%, 11/15/23, Pool #354701 2,683‌ 9,796,494 Total Mortgage Backed Securities (Cost $17,668,542) 18,108,612 Corporate Bonds (32.0%) Aerospace & Defense (1.4%) 1,450,000‌ Boeing Co. (The), 3.25%, 2/1/28, Callable 12/1/27 @ 100* 1,526,801‌ See notes to the schedule of portfolio investments. - 14 - Schedule of Portfolio Investments Bond Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Corporate Bonds, continued Airlines (1.0%) $ 995,426‌ United Airlines Pass Through Trust, Series 2020-1, Class A, 5.88%, 4/15/29 $ 1,100,269‌ Banks (4.3%) 1,940,000‌ Bank of America Corp., 3.55% (US0003M + 78 bps), 3/5/24, Callable 3/5/23 @ 100 * 2,046,356‌ 1,100,000‌ JPMorgan Chase & Co., 2.52% (SOFR + 204 bps), 4/22/31, Callable 4/22/30 @ 100 * 1,116,376‌ 1,300,000‌ Wells Fargo & Co., 3.00%, 10/23/26 1,409,700‌ 4,572,432‌ Beverages (0.8%) 800,000‌ PepsiCo, Inc., 2.75%, 3/19/30, Callable 12/19/29 @100* 853,313‌ Capital Markets (2.3%) 1,300,000‌ Goldman Sachs Group, Inc., 3.50%, 11/16/26, Callable 11/16/25 @ 100 * 1,420,863‌ 1,000,000‌ LSEGA Financing PLC, 1.38%, 4/6/26, Callable 3/6/26 @ 100 *(b) 1,004,796‌ 2,425,659‌ Diversified Financial Services (0.8%) 850,000‌ Korea Development Bank, 2.75%, 3/19/23 885,334‌ Diversified Telecommunication Services (1.4%) 1,520,000‌ AT&T, Inc., 3.50%, 9/15/53, Callable 3/15/53 @ 100 *(b) 1,445,783‌ Electric Utilities (1.0%) 1,000,000‌ Entergy Mississippi LLC, 3.25%, 12/1/27, Callable 9/1/27 @ 100 * 1,091,804‌ Entertainment (0.7%) 715,000‌ The Walt Disney Co., 2.00%, 9/1/29, Callable 6/1/29 @ 100* 712,038‌ Equity Real Estate Investment Trusts (0.2%) 205,277‌ JBG/Rockville NCI Campus LLC, Series 2010-A, 3.90%, 7/15/23 (b) 209,500‌ Food Products (2.3%) 1,059,000‌ Conagra Brands, Inc., 4.60%, 11/1/25, Callable 9/1/25 @ 100* 1,212,027‌ 320,000‌ Mars, Inc., 0.88%, 7/16/26, Callable 6/16/26 @ 100 *(b) 313,779‌ 825,000‌ Mars, Inc., 3.20%, 4/1/30, Callable 1/1/30 @ 100 *(b) 894,716‌ 2,420,522‌ Health Care Providers & Services (3.4%) 700,000‌ Ascension Health, Series B, 2.53%, 11/15/29, Callable 8/15/29 @ 100 * 726,153‌ 795,000 Montefiore Medical Center, 2.15%, 10/20/26, Callable 4/20/26 @ 100 * 831,703‌ 1,050,000‌ Partners Healthcare Syst, Inc., Series 2020, 3.19%, 7/1/49, Callable 1/1/49 @ 100 * 1,079,167‌ 890,000‌ Sutter Health, 3.70%, 8/15/28, Callable 5/15/28 @100* 983,823‌ 3,620,846‌ Hotels, Restaurants & Leisure (2.9%) 1,500,000‌ Hyatt Hotels Corp., 4.38%, 9/15/28, Callable 6/15/28 @ 100* 1,636,885‌ 345,000‌ Royal Caribbean Cruises, 5.25%, 11/15/22 356,319‌ 1,000,000‌ Starbucks Corp., 3.75%, 12/1/47, Callable 6/1/47 @ 100* 1,053,660‌ 3,046,864‌ Household Durables (0.7%) 620,000‌ Harman International Industries, Inc., 4.15%, 5/15/25, Callable 2/15/25 @ 100 * 683,215‌ Shares or Principal Amount Security Description Value Corporate Bonds, continued Insurance (1.1%) $ 1,100,000‌ Jackson National Life Global Funding, 2.65%, 6/21/24 (b) $ 1,158,934‌ Internet & Direct Marketing Retail (1.0%) 1,000,000‌ Expedia Group, Inc., 3.80%, 2/15/28, Callable 11/15/27 @ 100* 1,078,023‌ IT Services (1.0%) 1,000,000‌ International Business Machines Corp., 3.50%, 5/15/29 1,103,763‌ Oil, Gas & Consumable Fuels (1.9%) 1,000,000‌ HollyFrontier Corp., 2.63%, 10/1/23 1,033,723‌ 900,000‌ Marathon Oil Corp., 4.40%, 7/15/27, Callable 4/15/27 @ 100* 1,012,224‌ 2,045,947 Semiconductors & Semiconductor Equipment (1.7%) 1,245,000 Broadcom, Inc., 4.75%, 4/15/29, Callable 1/15/29 @ 100* 1,424,954‌ 325,000 ‌Intel Corp., 3.25%, 11/15/49, Callable 5/15/49 @ 100* 330,135‌ 1,755,089‌ Specialty Retail (1.1%) 1,000,000 Lowe's Cos., Inc., 4.50%, 4/15/30, Callable 1/15/30 @ 100* 1,169,076‌ Technology Hardware, Storage & Peripherals (1.0%) 1,000,000‌ Apple, Inc., 3.20%, 5/11/27, Callable 2/11/27 @ 100* 1,104,857‌ Total Corporate Bonds (Cost $32,944,712) 34,010,069‌ Taxable Municipal Bonds (18.9%) Georgia (1.7%) 1,665,000‌ State of Georgia, Build America Bonds, GO, Series H,4.50%,11/1/25 1,829,101‌ Kentucky (0.7%) 750,000‌ Lexington-Fayette Urban County Airport Board Corp. Revenue, 2.84%, 7/1/31 762,387‌ Massachusetts (1.2%) 1,150,000‌ Massachusetts State College Building Authority Revenue, Series C, 2.44%, 5/1/28, ST APPROP 1,217,291‌ Michigan (1.4%) 500,000‌ Michigan State Housing Development Authority Revenue, Series B, 2.72%, 10/1/35, Continuously Callable @ 100 497,089‌ 1,000,000‌ Michigan State Housing Development Authority Revenue, Series B, 3.49%, 12/1/40, Continuously Callable @ 100 1,031,460‌ 1,528,549‌ New York (1.3%) 1,260,000‌ New York City Transitional Finance Authority Revenue, Series F-3, 3.21%, 5/1/29, Continuously Callable @ 100 1,360,273‌ Oklahoma (2.6%) 500,000‌ Grand River Dam Authority Revenue, Series B, 4.55%, 6/1/39, Continuously Callable @ 100 541,453‌ 450,000‌ The University of Oklahoma Revenue, Series C, 2.45%, 7/1/32, Continuously Callable @ 100 452,446‌ 1,650,000‌ University of Oklahoma Health Sciences Center General Revenue, Series A, 3.87%, 7/1/32, Continuously Callable @ 100 1,793,966‌ 2,787,865‌ See notes to the schedule of portfolio investments. - 15 - Schedule of Portfolio Investments Bond Fund May 31, 2021 (Unaudited) Concluded Shares or Principal Amount Security Description Value Taxable Municipal Bonds, continued Oregon (1.9%) $ 1,000,000 State of Oregon, GO, Series O, 1.60%, 8/1/31, Continuously Callable @ 100 $ 979,497 1,000,000 State of Oregon, GO, Series O, 1.70%, 8/1/32, Continuously Callable @ 100 978,029 1,957,526 Pennsylvania (1.2%) 1,110,000 City of Bethlehem Lehigh and Northampton Countries, GO, Series C, 5.15%, 11/1/34, Pre-refunded 11/1/24 @ 100, AGM 1,284,475 Texas (4.8%) 1,000,000 Arlington Independent School District, GO, 5.00%, 2/15/26, PSF-GTD 1,193,665 1,000,000 Arlington Independent School District, GO, 5.00%, 2/15/27, PSF-GTD 1,217,236 675,000 Country of Galveston Texas, Build America Bonds, GO, 5.91%, 2/1/29 800,779 785,000 Texas Transportation Commission State Highway Fund Revenue, 5.18%, 4/1/30 967,291 1,000,000 Texas Transportation Commission, GO, 1.78%, 10/1/32 969,342 5,148,313 Shares or Principal Amount Security Description Value Taxable Municipal Bonds, continued Washington (2.1%) $ 1,200,000 County of King WA Sewer Revenue, Series B, 1.86%, 1/1/33, Continuously Callable @ 100 $ 1,185,506 1,070,000 Pierce County School District No 10 Tacoma, GO, 1.90%, 12/1/33, SCH BD GTY 1,058,044 Total Taxable Municipal Bonds (Cost $19,713,994) 2,243,550 20,119,330 U.S. Government Agency Securities (2.8%) Federal Home Loan Banks 1,000,000 0.65%, 4/28/26, Callable 7/28/21 @ 100*(a) 1,000,357 1,000,000 1.00%, 4/26/29, Callable 7/26/21 @ 100*(a) 1,000,019 1,000,000 1.30%, 3/17/27, Callable 6/17/21 @ 100* 997,566 Total U.S. Government Agency Securities (Cost $3,000,000) 2,997,942 U.S. Treasury Obligations (16.0%) U.S. Treasury Notes 3,255,000 1.13%, 2/15/31 3,119,205 4,557,000 1.38%, 10/15/22 4,635,679 4,547,000 2.00%, 4/30/24 4,772,219 4,233,000 2.25%, 2/15/27 4,532,452 Total U.S. Treasury Obligations (Cost $16,836,758) 17,059,555 Investment in Affiliates (4.9%) 5,260,458 Cavanal Hill Government Securities Money Market Fund, Select Shares, 0.01%(d) 5,260,458 Total Investment in Affiliates (Cost $5,260,458) 5,260,458 Total Investments (Cost $104,871,747) - 100.6% 107,081,334 Liabilities in excess of other assets — (0.6)% (655,442 ) Net Assets - 100.0% $ 106,425,892 (a) The rate for certain asset-backed and mortgage-backed securities may vary based on factors relating to the pool of assets underlying the security. The rate presented is the rate in effect at May 31, 2021. (b) Represents a restricted security, purchased under Rule 144A, Section 4(2), which is exempt from registration under the Securities Act of 1933, as amended. The security has been deemed liquid according to the policies and procedures adopted by the Board of Trustees. (c) Step Bond: Coupon rate is set for an initial period and then increased to a higher coupon rate at a specified date. The rate shown is the rate in effect at May 31, 2021. (d) Money market investment. The rate presented on the Schedule of Portfolio Investments is the rate in effect at May 31, 2021. * Represents next call date. Additional subsequent call dates and amounts may apply to this security. † Mortgage backed securities are classified based on the characteristics of their underlying collateral, the fixed vs. variable nature of the obligations, and the credit standing of the mortgagors. The fixed or variable rate nature of securities interest payments to which the fund is entitled may not coincide with the payment nature of the collateral underlying the securities. AGM Assured Guaranty Municipal Corporation GO General Obligation H15T1Y 1 Year Treasury Constant Maturity Rate LIBOR London Interbank Offered Rate PSF-GTD Public School Fund Guaranteed SCH BD GTY School Board Guaranty SOFR Secured Overnight Financing Rate US0001M 1 Month US Dollar LIBOR US0003M 3 Month US Dollar LIBOR See notes to the schedule of portfolio investments. - 16 - Schedule of Portfolio Investments Strategic Enhanced Yield Fund May 31, 2021 (Unaudited) Shares or Principal Amount Security Description Value Asset Backed Securities (19.9%) $ 375,000 AB Issuer LLC, Series 2021-1, Class A2, 3.73%, 7/30/51, Callable 1/30/26 @ 100*(a) $ 377,121 151,548 ABFC Trust, Series 2005-AQ1, Class A6, 4.59%, 1/25/35, Callable 6/25/21 @ 100*(b)(c) 157,135 286,261 ABFC Trust, Series 2005-HE2, Class M3, 0.89% (US0001M + 78 bps), 6/25/35, Callable 6/25/21@100* 287,297 600,000 Amur Equipment Finance Receivables LLC, Series 2021-1A, Class E, 4.13%, 3/20/28, Callable 2/20/25 @ 100*(d) 599,459 570,813 Asset Backed Securities Corp. Home Equity Loan Trust, Series 2004-HE5, Class M1, 1.01% (US0001M + 90 bps), 8/25/34, Callable 6/25/21 @ 100* 558,769 338,753 Bayview Commercial Asset Trust, Series 2004-3, Class A1, 0.46% (US0001M + 56 bps), 1/25/35, Callable 6/25/21 @ 100*(a) 335,598 19,868 Bayview Financial Mortgage Pass Trust, Series 2005-D, Class AF4, 5.50%, 12/28/35, Callable 6/28/21 @ 100*(b) 19,822 31,034 Bayview Opportunity Master Fund Trust, Series 2017-RT1, Class A1, 3.00%, 3/28/57, Callable 4/28/22 @ 100*(a)(b) 31,534 148,483 Bear Stearns Structured Products Trust, Series 2007-EMX1, Class A2, 1.39% (US0001M + 130 bps), 3/25/37, Callable 10/25/22 @ 100*(a) 148,301 23,428 Centex Home Equity Loan Trust, Series 2002-A, Class AF6, 5.54%, 1/25/32, Callable 6/25/21 @ 100* 24,184 14,216 Centex Home Equity Loan Trust, Series 2005-A, Class AF5, 5.78%, 1/25/35, Callable 6/25/21 @ 100*(b)(c) 14,192 52 Countrywide Asset-Backed Certificates Trust, Series 2004-13, Class AF5B, 4.66%, 5/25/35, Callable 6/25/21 @ 100*(b)(c) 52 163,238 Credit-Based Asset Servicing And Securitization LLC, Series 2005-RP2, Class M2, 1.69% (US0001M + 160 bps), 9/25/35, Callable 3/25/22 @ 100*(a) 165,178 200,183 Credit-Based Asset Servicing And Securitization LLC, Series 2007-SP1, Class A4, 4.89%, 12/25/37, Callable 6/25/21 @ 100*(a)(b)(c) 203,236 33,116 GSAA Home Equity Trust, Series 2005-1, Class M1, 5.80%, 11/25/34, Callable 6/25/21 @ 100*(b)(c) 33,603 244,831 GSAMP Trust, Series 2006-HE1, Class M1, 0.68% (US0001M + 39 bps), 1/25/36, Callable 6/25/21 @ 100* 244,732 182,490 MASTR Asset Backed Securities Trust, Series 2004-FRE1, Class M6, 2.19% (US0001M + 210 bps), 7/25/34, Callable 6/25/21 @ 100* 182,935 504,350 Morgan Stanley Dean Witter Capital I, Inc., Series 2003-NC3, Class M1, 1.44% (US0001M + 135 bps), 3/25/33, Callable 6/25/21 @ 100* 507,215 290,000 Neighborly Issuer LLC, Series 2021-1A, Class A2, 3.58%, 4/30/51, Callable 10/30/26 @ 100*(a) 296,858 464,250 NovaStar Mortgage Funding Trust, Series 2003-4, Class A1, 0.83% (US0001M + 74 bps), 2/25/34, Callable 6/25/21 @ 100* 457,154 Shares or Principal Amount Security Description Value Asset Backed Securities, continued $ 62,084 Quest Trust, Series 2005-X1, Class M2, 1.29% (US0001M + 120 bps), 3/25/35, Callable 6/25/21 @ 100*(a) $ 62,130 27,413 Residential Asset Mortgage, Series 2004-RS12, Class MI1, 5.62%, 12/25/34, Callable 6/25/21 @ 100*(b)(c) 28,374 49,423 Residential Asset Securities Corp., Series 2004-KS8, Class MI1, 5.34%, 9/25/34, Callable 6/25/21 @ 100*(b) 50,880 78,264 Saxon Asset Securities Trust, Series 2007-1, Class A2C, 0.24% (US0001M + 15 bps), 1/25/47, Callable 7/25/23 @ 100* 77,626 149,272 Specialty Underwriting & Residential Finance, Series 2003-BC4, Class A3B, 4.79%, 11/25/34, Callable 6/25/21 @ 100*(b) 153,599 Total Asset Backed Securities (Cost $4,956,989) 5,016,984 Mortgage Backed Securities† (30.0%) Alt-A - Fixed Rate Mortgage Backed Securities (3.7%) 22,030 Bear Stearns Asset-Backed Securities Trust, Series 2004-AC3, Class A1, 5.25%, 6/25/34, Callable 6/25/21 @ 100*(b)(c) 22,742 15,974 Countrywide Alternative Loan Trust, Series 2004-16CB, Class 1A1, 5.50%, 7/25/34, Callable 6/25/21 @ 100* 16,401 17,720 Countrywide Alternative Loan Trust, Series 2004-16CB, Class 3A1, 5.50%, 8/25/34, Callable 6/25/21 @ 100* 18,202 99,860 Countrywide Alternative Loan Trust, Series 2003-22CB, Class 1A1, 5.75%, 12/25/33, Callable 6/25/21 @1 00* 103,159 36,574 Countrywide Alternative Loan Trust, Series 2004-16CB, Class 4A3, 6.00%, 8/25/34, Callable 6/25/21 @ 100* 37,063 34,154 Countrywide Alternative Loan Trust, Series 2004-J2, Class 2A1, 6.50%, 3/25/34, Callable 6/25/21 @ 100* 34,910 12,130 MASTR Alternative Loans Trust, Series 2004-11, Class 6A1, 5.50%, 10/25/34, Callable 6/25/21 @ 100* 12,631 103,890 MASTR Alternative Loans Trust, Series 2004-7, Class 1A1, 5.50%, 7/25/34, Callable 6/25/21 @ 100* 107,839 137,667 MASTR Alternative Loans Trust, Series 2003-3, Class 2A5, 6.00%, 5/25/33, Callable 6/25/21 @ 100* 142,880 37,388 MASTR Alternative Loans Trust, Series 2004-5, Class 2A1, 6.00%, 6/25/34, Callable 6/25/21 @ 100* 38,573 294,000 Residential Asset Securitization Trust, Series 2003-A7, Class A8, 5.00%, 7/25/33, Callable 6/25/21 @ 100* 307,391 67,000 Residential Asset Securitization Trust, Series 2003-A10, Class A2, 5.20%, 9/25/33, Callable 6/25/21 @ 100* 67,623 21,291 Structured Asset Securities Corp., Series 2004-4XS, Class A3A, 5.15%, 2/25/34, Callable 6/25/21 @ 100*(b)(c) 21,470 930,884 See notes to the schedule of portfolio investments. - 17 - Schedule of Portfolio Investments Strategic Enhanced Yield Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued Prime Adjustable Rate Mortgage Backed Securities (13.0%) $ 57,758 Citigroup Mortgage Loan Trust, Inc., Series 2004-UST1, Class A5, 2.13%, 8/25/34, Callable 6/25/21 @ 100*(b) $ 59,045 100,860 Impac Secured Assets CMN Owner Trust, Series 2003-3, Class A1, 5.10%, 8/25/33, Callable 6/25/21 @ 100*(b) 104,661 422,028 LSTAR Securities Investment, Ltd., Series 2019-4, Class A1, 2.61% (US0001M + 150 bps), 5/1/24(a) 419,844 702,249 LSTAR Securities Investment, Ltd., Series 2019-3, Class A2, 3.61% (US0001M + 250 bps), 4/1/24, Callable 5/1/23 @ 100*(a) 704,859 530,000 LSTAR Securities Investment, Ltd., Series 2019-4, Class A2, 3.61% (US0001M + 250 bps), 5/1/24(a) 543,712 500,000 Mello Warehouse Securitization Trust, Series 2020-2, Class E, 2.34% (US0001M + 225 bps), 11/25/53, Callable 12/25/23 @ 100*(a) 501,241 500,000 Mello Warehouse Securitization Trust, Series 2021-1, Class G, 4.48% (US0001M + 438 bps), 2/25/55, Callable 2/25/24 @ 100*(a) 502,484 136,713 RBSSP Resecuritization Trust, Series 2011-3, Class 2A1, 0.36% (US0001M + 25 bps), 2/26/37(a) 137,147 38,079 Structured Adjustable Rate Mortgage Loan Trust, Series 2004-12, Class 3A2, 2.48%, 9/25/34, Callable 6/25/21 @ 100*(b) 38,947 36,046 Structured Adjustable Rate Mortgage Loan Trust, Series 2004-8, Class 3A, 2.65%, 7/25/34, Callable 6/25/21 @ 100*(b) 38,626 153,094 Terwin Mortgage Trust, Series 2006-9HGA, Class A2, 0.51% (US0001M + 20 bps), 10/25/37, Callable 6/25/21 @ 100*(a) 152,004 83,404 WinWater Mortgage Loan Trust, Series 2014-1, Class A1, 3.85%, 6/20/44, Callable 1/20/22 @ 100*(a)(b) 84,433 3,287,003 Prime Fixed Mortgage Backed Securities (8.1%) 134,861 Alternative Loan Trust, Series 2004-18CB, Class 4A1, 5.50%, 9/25/34, Callable 6/25/21 @ 100* 138,916 18,725 Banc of America Funding Trust, Series 2004-3, Class 1A9, 5.50%, 10/25/34, Callable 6/25/21 @ 100* 19,061 345,000 Brean Asset Backed Securities Trust, Series 2021-RM1, Class M1, 1.60%, 10/25/63, Callable 9/25/27 @ 100*(d) 315,486 8,991 Citicorp Mortgage Securities Trust, Series 2006-3, Class 1A19, 5.75%, 6/25/36, Callable 6/25/21 @ 100* 9,009 10,625 Citicorp Mortgage Securities Trust, Series 2006-3, Class 1A3, 6.25%, 6/25/36, Callable 6/25/21 @ 100* 10,847 117,498 Countrywide Home Loans, Series 2005-6, Class 1A3, 5.15%, 4/25/35, Callable 6/25/21 @ 100* 122,819 27,000 Countrywide Home Loans, Series 2004-10, Class A4, 5.25%, 7/25/34, Callable 6/25/21 @ 100* 28,147 86,000 Countrywide Home Loans, Series 2004-4, Class A4, 5.25%, 5/25/34, Callable 6/25/21 @ 100* 89,767 Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued Prime Fixed Mortgage Backed Securities, continued: $ 43,000 Countrywide Home Loans, Series 2004-9, Class A5, 5.25%, 6/25/34, Callable 6/25/21 @ 100* $ 43,860 225,000 Countrywide Home Loans, Series 2005-5, Class A4, 5.40%, 3/25/35, Callable 6/25/21 @ 100* 228,094 107,655 Countrywide Home Loans, Series 2004-4, Class A9, 5.50%, 5/25/34, Callable 6/25/21 @ 100* 108,220 51,000 Countrywide Home Loans, Series 2004-8, Class 1A3, 5.50%, 7/25/34, Callable 6/25/21 @ 100* 51,218 51,000 Countrywide Home Loans, Series 2004-8, Class 1A7, 5.75%, 7/25/34, Callable 6/25/21 @ 100* 51,789 10,924 Credit Suisse Mortgage Trust, Series 2013-IVR2, Class AD, 1.55%, 4/25/43, Callable 10/25/22 @ 100*(a)(b) 10,926 61,990 GMAC Mortgage Loan Trust, Series 2004-J2, Class A8, 5.75%, 6/25/34, Callable 6/25/21 @ 100* 62,969 102,687 GSR Mortgage Loan Trust, Series 2004-10F, Class 6A1, 5.00%, 9/25/34, Callable 6/25/21 @ 100* 103,763 255,000 Mello Warehouse Securitization Trust, Series 2021-2, Class F, 4.84% (US0001M + 475 bps), 4/25/55, Callable 4/25/24 @ 100*(a) 255,359 315,000 NewRez Warehouse Securitization Trust, Series 2021-1, Class F, 5.34% (US0001M + 525 bps), 5/25/55, Callable 5/25/24 @ 100*(a) 316,234 2,702 Sequoia Mortgage Trust, Series 2013-4, Class A3, 1.55%, 4/25/43, Callable 6/25/22 @ 100*(b) 2,701 59,000 WaMu Mortgage Pass-Through Certificate, Series 2004-RS1, Class A3, 5.50%, 11/25/33, Callable 6/25/21 @ 100* 60,362 2,029,547 U.S. Government Agency Mortgage Backed Securities (5.2%) 73,659 Fannie Mae, Series 2013-56, Class GM, 2.00%, 8/25/41 76,227 90,317 Fannie Mae, Series 2003-W14, Class 2A, 3.88%, 1/25/43, Callable 6/25/21 @ 100*(b) 94,621 191,980 Fannie Mae, Series 2003-W13, Class AF5, 4.78%, 10/25/33, Callable 6/25/21 @ 100*(b)(c) 216,717 129,037 Fannie Mae, Series 2002-W11, Class AF5, 4.98%, 11/25/32, Callable 6/25/21 @ 100*(b)(c) 138,398 143,651 Fannie Mae, Series 2004-W3, Class A8, 5.50%, 5/25/34, Callable 6/25/21 @ 100* 158,604 173,408 Fannie Mae, Series 240, Class 11, 9.00%, 9/25/23 187,512 194,644 Fannie Mae, Series 250, Class 11, 9.00%, 10/25/23 211,204 178,000 Freddie Mac, 1.50%, 1/27/33, Callable 7/27/21 @ 100* 170,404 57,895 Freddie Mac, Series 2017-SC01, Class 2A, 3.50%, 12/25/46, Callable 5/25/25 @ 100* 58,301 3,044 Government National Mortgage Assoc., Series 2013-176, Class BE, 7.16%, 3/16/46, Callable 6/16/21 @ 100*(b) 4,599 1,316,587 Total Mortgage Backed Securities (Cost $7,467,639) 7,564,021 See notes to the schedule of portfolio investments. - 18 - Schedule of Portfolio Investments Strategic Enhanced Yield Fund May 31, 2021 (Unaudited) Concluded Shares or Principal Amount Security Description Value Corporate Bonds (26.6%) Aerospace & Defense (2.3%) $ 389,000 Boeing Co. (The), 8.75%, 9/15/31 $ 572,891 Airlines (3.0%) 416,780 Alaska Airlines Pass Through Trust, Class B, 8.00%, 2/15/27 (a) 467,898 284,164 American Airlines Pass-Through Trust, Class A, 4.95%,7/15/24 287,009 754,907 Banks (3.3%) 543,000 Citigroup, Inc., 4.00% (H15T5Y + 360 bps), 12/31/99, Callable 12/10/25 @ 100* 553,860 273,000 Wells Fargo & Co., 3.90% (H15T5Y + 345 bps), 12/31/99, Callable 3/15/26 @ 100* 279,839 833,699 Capital Markets (4.4%) 500,000 Goldman Sachs Group, Inc. (The), 3.80% (H15T5Y + 297 bps), 12/31/99, Callable 5/10/26 @ 100* 500,750 605,000 Goldman Sachs Group, Inc. (The), 5.00% (US0003M + 287 bps), 12/31/99, Callable 11/10/22 @ 100* 608,128 1,108,878 Chemicals (1.8%) 400,000 Monsanto Co., 5.50%, 7/30/35 457,608 Oil, Gas & Consumable Fuels (3.4%) 287,000 HollyFrontier Corp., 4.50%, 10/1/30, Callable 7/1/30 @ 100* 300,858 26,000 ONEOK, Inc., 5.85%, 1/15/26, Callable 12/15/25 @ 100* 30,836 425,000 ONEOK, Inc., 6.35%, 1/15/31, Callable 10/15/30 @ 100* 538,911 870,605 Sovereign Bond (1.8%) 450,000 International Bank for Reconstruction & Development, 2.70%, 12/28/37, Callable 12/28/22 @ 100* 447,137 Shares or Principal Amount Security Description Value Corporate Bonds, continued Technology Hardware, Storage & Peripherals (1.1%) $ 209,000 Hewlett Packard Enterprise Co., 6.35%, 10/15/45, Callable 4/15/45 @ 100* $ 276,196 Tobacco (5.5%) 180,000 Altria Group, Inc., 5.95%, 2/14/49, Callable 8/14/48 @ 100* 221,366 546,000 BAT Capital Corp., 4.91%, 4/2/30, Callable 1/2/30 @ 100* 618,642 156,000 Philip Morris International, Inc., 6.38%, 5/16/38 217,404 227,000 Reynolds American, Inc., 8.13%, 5/1/40 323,527 Total Corporate Bonds (Cost $6,689,458) 1,380,939 6,702,860 U.S. Government Agency Securities (8.0%) Federal Farm Credit Banks 1,000,000 1.99%, 9/24/40, Callable 9/24/21 @ 100* 936,263 150,000 2.00%, 5/14/40, Callable 5/14/25 @ 100* 141,401 230,000 2.13%, 5/21/40, Callable 6/17/21 @ 100* 221,207 1,298,871 Federal Home Loan Banks 220,000 1.92%, 6/4/37, Callable 6/17/21 @ 100* 211,081 220,000 1.95%, 6/3/36, Callable 6/17/21 @ 100* 214,197 285,000 2.00%, 5/4/35, Callable 6/17/21 @ 100* 281,892 Total U.S. Government Agency Securities (Cost $2,104,514) 707,170 2,006,041 Investment Companies (4.3%) 12,511 iShares IBoxx High Yield Corporate Bond ETF, 4.65% 1,090,709 Total Investment Companies (Cost $1,086,674) 1,090,709 Investment in Affiliates (10.9%) 2,747,312 Cavanal Hill Government Securities Money Market Fund, Select Shares, 0.01%(e) 2,747,312 Total Investment in Affiliates (Cost $2,747,312) 2,747,312 Total Investments (Cost $25,052,586) - 99.7% 25,127,927 Other assets in excess of liabilities — 0.3% 66,165 Net Assets - 100.0% $ 25,194,092 (a) Represents a restricted security, purchased under Rule 144A, Section 4(2), which is exempt from registration under the Securities Act of 1933, as amended. The security has been deemed liquid according to the policies and procedures adopted by the Board of Trustees. (b) The rate for certain asset-backed and mortgage-backed securities may vary based on factors relating to the pool of assets underlying the security. The rate presented is the rate in effect at May 31, 2021. (c) Step Bond: Coupon rate is set for an initial period and then increased to a higher coupon rate at a specified date. The rate shown is the rate in effect at May 31, 2021. (d) Represents a restricted security, purchased under Rule 144A, Section 4(2), which is exempt from registration under the Securities Act of 1933, as amended. The security has been deemed illiquid according to the policies and procedures adopted by the Board of Trustees. At May 31, 2021, illiquid securities were 3.6% of the Fund's net assets. (e) Money market investment. The rate presented on the Schedule of Portfolio Investments is the rate in effect at May 31, 2021. * Represents next call date. Additional subsequent call dates and amounts may apply to this security. † Mortgage backed securities are classified based on the characteristics of their underlying collateral, the fixed vs. variable nature of the obligations, and the credit standing of the mortgagors. The fixed or variable rate nature of securities interest payments to which the fund is entitled may not coincide with the payment nature of the collateral underlying the securities. ETF Exchange Traded Fund H15T5Y 5 Year Treasury Constant Maturity Rate LIBOR London Interbank Offered Rate US0001M 1 Month US Dollar LIBOR US0003M 3 Month US Dollar LIBOR See notes to the schedule of portfolio investments. - 19 - Schedule of Portfolio Investments Ultra Short Tax-Free Income Fund May 31, 2021 (Unaudited) Shares or Principal Amount Security Description Value Municipal Bonds (104.4%) Alaska (0.3%) $ 100,000 City of Valdez Alaska Revenue, Series C, 0.02%, 12/1/29, Continuously Callable @ 100, GTY(a) $ 100,000 Colorado (4.3%) 1,505,000 City of Colorado Springs, Colorado Variable Rate Demand Utilities System Improvement Revenue, Series C, 0.04%, 11/1/40, Continuously Callable @ 100, Barclays Bank(a) 1,505,000 Connecticut (2.2%) 750,000 Town of Griswold CT, GO, 1.25%, 7/19/21 750,837 District of Columbia (3.8%) 1,325,000 Metropolitan Washington Airports Authority Revenue, Series D-1, 0.05%, 10/1/39, Continuously Callable @ 100, LOC(a) 1,325,000 Florida (4.0%) 1,400,000 Palm Beach County Revenue, 0.05%, 7/1/32, Callable 7/1/21 @ 100, Northern Trust Co.*(a) 1,400,000 Illinois (16.7%) 1,400,000 Channahon Illinois, Morris Hospital Revenue, 0.04%, 12/1/34, Continuously Callable @ 100, U.S. Bank NA(a) 1,400,000 130,000 City of Monmouth IL, GO, 4.00%, 12/1/21, BAM 132,137 165,000 City of Waukegan IL Water & Sewer System Revenue, 4.00%, 12/30/21, AGM 168,528 525,000 Cook County Community Unit School District No 401 Elmwood Park, GO, 3.00%, 12/1/21 532,214 340,000 Cook County School District No 162 Matteson, GO, Series B, 3.00%, 12/1/21, BAM 344,501 405,000 Cook County School District No 88 Bellwood, GO, 4.00%,12/1/22 426,903 145,000 County of Du Page IL, GO, 4.00%, 7/1/21 145,450 200,000 Kankakee & Will Counties Community Unit School District No 5, GO, 5.00%, 12/1/21, BAM 204,735 100,000 Sangamon Logan & Menard Counties Community Unit School Dist No 15 Williamsville, GO, 5.00%,12/1/22, BAM 106,402 1,300,000 Village of Brookfield IL Revenue, 0.07%, 6/1/38, Continuously Callable @100, Northern Trust Co.(a) 1,300,000 345,000 Village of Franklin Park IL, GO, 3.00%, 7/1/23, AGC: ASSURED GUARANTY CORP 363,535 170,000 West Chicago Park District, GO, Series B, 3.00%, 12/1/22, BAM 177,075 500,000 Williamson & Johnson Counties Community Unit School District No 2 Marion, GO, 2.00%, 12/1/21, BAM 503,762 5,805,242 Indiana (13.5%) 1,400,000 Beech Grove Central School Building Corp. Revenue, 2.00%, 7/15/21, Continuously Callable @ 100 1,400,680 500,000 Brownsburg 1999 School Building Corp. Revenue, 1.50%, 5/13/22, Continuously Callable @ 100 502,141 750,000 Hamilton Southeastern Consolidated School Building Corp. Revenue, 2.00%, 7/15/21 750,866 750,000 Hamilton Southeastern Schools, GO, Series B, 3.00%, 12/31/21, ST INTERCEPT 761,237 400,000 Lafayette School Corp., GO, 4.00%, 7/15/21, ST INTERCEPT 401,678 Shares or Principal Amount Security Description Value Municipal Bonds, continued Indiana, continued: $ 850,000 Lafayette School Corp., GO, 4.00%, 1/15/22, ST INTERCEPT $ 868,838 4,685,440 Kentucky (4.7%) 380,000 Bowling Green Independent School District Finance Corp. Revenue, 4.00%, 11/1/22, ST INTERCEPT 399,872 200,000 Kentucky Association of Counties Finance Corp. Revenue, 2.00%, 2/1/23 204,893 1,000,000 Kentucky Interlocal School Transportation Association, 1.25%, 3/1/23, STATE INTERCEPT PROG FOR HIGHER ED 1,014,528 1,619,293 Lousiana (1.0%) 325,000 Lafourche Parish School Board, GO, 5.00%, 3/1/22 336,308 Minnesota (4.0%) 1,400,000 City of Minneapolis MN Revenue, Series B, 0.06%, 12/1/27, Callable 7/1/21 @ 100, WELLS FARGO*(a) 1,400,000 Mississippi (4.0%) 400,000 County of Jackson MS Revenue, 0.01%, 6/1/23, Callable 7/1/21 @ 100*(a) 400,000 1,000,000 Mississippi Business Finance Corp. Revenue, Series G, 0.01%, 11/1/35, Callable 7/1/21 @ 100*(a) 1,000,000 1,400,000 Missouri (1.2%) 200,000 Nixa Public Schools, 4.00%, 4/1/22 206,056 185,000 Nixa Public Schools, 4.00%, 4/1/23 197,123 403,179 Nevada (3.9%) 1,350,000 County of Clark Nevada Industrial Development Revenue, Series A, 0.08%, 12/1/39, Continuously Callable @ 100, Bank of America(a) 1,350,000 Oregon (3.5%) 1,200,000 State of Oregon, GO, 0.05%, 12/1/36, Continuously Callable @ 100, Unicredit SpA(a) 1,200,000 Pennsylvania (4.1%) 125,000 City of Allentown PA, GO, 4.00%, 10/1/21, BAM 126,491 1,300,000 Philadelphia Pennsylvania, GO, Series B, 0.04%, 8/1/31, Continuously Callable @ 100, Barclays Bank(a) 1,300,000 1,426,491 Rhode Island (4.0%) 1,400,000 Rhode Island Health and Educational Building Corp. Revenue, 0.04%, 9/1/43, Callable 7/1/21 @ 100, Northern Trust Co.*(a) 1,400,000 Tennessee (10.8%) 400,000 Clarksville Public Building Authority Revenue, 0.04%, 1/1/33, Callable 7/1/21 @ 100, BAM*(a) 400,000 255,000 County of Fayette TN, GO, 2.00%, 3/1/23 262,573 500,000 County of Hawkins TN, GO, 3.00%, 3/1/22 510,168 1,200,000 Loudon Industrial Development Board Revenue, 0.05%, 6/1/23, Continuously Callable @ 100, CITI: CITIGROUP(a) 1,200,000 See notes to the schedule of portfolio investments. - 20 - Schedule of Portfolio Investments Ultra Short Tax-Free Income Fund May 31, 2021 (Unaudited) Concluded Shares or Principal Amount Security Description Value Municipal Bonds, continued Tennessee, continued: $ 1,400,000 Montgomery County Public Building Authority Revenue, 0.11%, 11/1/27, Callable 7/1/21 @ 100, Bank of America*(a) $ 1,400,000 3,772,741 Texas (16.0%) 1,020,000 Austin Texas Hotel Occupancy Tax Revenue, 0.08%, 11/15/29, Continuously Callable @100, JPM(a) 1,020,000‌ 215,000 City of Austin TX Revenue, 5.00%, 11/15/22, Continuously Callable @100, AGC: ASSURED GUARANTY CORP. 219,755‌ 100,000 City of Elgin TX, GO, 4.00%, 7/15/22, AGC: ASSURED GUARANTY CORP. 104,085‌ 100,000 City of Elgin TX, GO, 4.00%, 7/15/22, AGC: ASSURED GUARANTY CORP. 104,085‌ 100,000 City of Elgin TX, GO, 4.00%, 7/15/23, AGC: ASSURED GUARANTY CORP. 107,580‌ 100,000 City of Elgin TX, GO, 4.00%, 7/15/23, AGC: ASSURED GUARANTY CORP. 107,580‌ 200,000 Fort Bend County Municipal Utility District No.130,GO,2.00%,9/1/21,AGM 200,554‌ 265,000 Fort Bend County Municipal Utility District No 130, GO, 2.00%, 9/1/22, AGM 268,526‌ 165,000 Fort Bend County Municipal Utility District No 139, GO, 4.00%, 3/1/22, AGC: ASSURED GUARANTY CORP. 169,548‌ 180,000 Fort Bend County Municipal Utility District No 139, GO, 4.00%, 3/1/23, AGC: ASSURED GUARANTY CORP. 191,060 Shares or Principal Amount Security Description Value Municipal Bonds, continued Texas, continued: $ 380,000 Fort Bend County Municipal Utility District No 169, GO, 3.00%, 12/1/21, AGM $ 384,744‌ 675,000 Galveston County Municipal Utility District No 56, GO, 4.50%, 12/1/22, AGM 717,064‌ 170,000 Grand Mission Municipal Utility District No 1, GO, 3.00%,9/1/22,AGM 175,722‌ 375,000 Harris County Municipal Utility District NO 278, GO,4.00%,9/1/23 404,626‌ 365,000 Harris County Municipal Utility District No 287, GO, 2.00%, 9/1/21, AGM 366,529‌ 570,000 Harris County Municipal Utility District No 287, GO, 2.00%, 9/1/22, AGM 581,952‌ 125,000 Remington Municipal Utility District No 1, GO, 4.00%,9/1/21,AGM 126,147‌ 165,000 Sienna Plantation Municipal Utility District No 12, GO, 3.00%, 9/1/22, AGC: ASSURED GUARANTY CORP. 170,680‌ 150,000 Spring West Municipal Utility District, GO, 3.00%, 9/1/21,AGM 151,036‌ 5,571,273‌ Wisconsin (2.4%) 830,000 City of Park Falls WI Water & Sewer System Revenue, 3.00%, 3/1/22 845,132‌ Total Municipal Bonds (Cost $36,277,503) 36,295,936‌ Investment in Affiliates (0.2%) 57,064 Cavanal Hill Government Securities Money Market Fund, Select Shares, 0.01%(b) 57,064‌ Total Investment in Affiliates (Cost $57,064) 57,064‌ Total Investments (Cost $36,334,567) - 104.6% 36,353,000‌ Liabilities in excess of other assets — (4.6)% (1,587,029 ‌) Net Assets - 100.0% $ 34,765,971‌ (a) Interest rate is determined by the Remarketing Agent. The rate presented is the rate in effect at May 31, 2021. (b) Money market investment. The rate presented on the Schedule of Portfolio Investments is the rate in effect at May 31, 2021. * Represents next call date. Additional subsequent call dates and amounts may apply to this security. AGC Assured Guaranty Corporation AGM Assured Guaranty Municipal Corporation BAM Build America Mutual Assurance Company GO General Obligation GTY Guarantor Agreement JPM J.P. Morgan Chase Bank LOC Letter of Credit See notes to the schedule of portfolio investments. - 21 - Schedule of Portfolio Investments Active Core Fund May 31, 2021 (Unaudited) Shares or Principal Amount Security Description Value Common Stocks (54.6%) Aerospace & Defense (0.7%) 317‌ General Dynamics Corp. $ 60,201‌ 41‌ HEICO Corp. 5,759‌ 38‌ HEICO Corp., Class A 5,034‌ 150‌ L3Harris Technologies, Inc. 32,709‌ 257‌ Lockheed Martin Corp. 98,225‌ 75‌ Northrop Grumman Corp. 27,440‌ 62‌ Raytheon Technologies Corp. 5,500‌ 32‌ Teledyne Technologies, Inc.(a) 13,423‌ 245‌ The Boeing Co.(a) 60,520‌ 40‌ TransDigm Group, Inc.(a) 25,954‌ 334,765‌ Air Freight & Logistics (0.1%) 140‌ United Parcel Service, Inc., Class B 30,044‌ Airlines (1.0%) 20,000‌ American Airlines Group, Inc.(a) 484,800‌ 694‌ Delta Air Lines, Inc.(a) 33,090‌ 118‌ Southwest Airlines Co.(a) 7,252‌ 525,142‌ Auto Components (0.2%) 1,563‌ BorgWarner, Inc. 80,166‌ 869‌ Gentex Corp. 30,850‌ 59‌ Lear Corp. 11,408‌ 122,424‌ Automobiles (0.2%) 167‌ Tesla, Inc.(a) 104,412‌ Banks (1.8%) 1,872‌ Bank of America Corp. 79,354‌ 728‌ Citigroup, Inc. 57,301‌ 311‌ East West Bancorp, Inc. 23,256‌ 2,388‌ JPMorgan Chase & Co. 392,205‌ 735‌ People's United Financial, Inc. 13,899‌ 69‌ SVB Financial Group(a) 40,219‌ 170‌ The PNC Financial Services Group, Inc. 33,096‌ 1,779‌ Truist Financial Corp. 109,907‌ 2,199‌ U.S. Bancorp 133,655‌ 283‌ Western Alliance Bancorp 28,303‌ 911,195‌ Beverages (0.7%) 63‌ Coca-Cola Consolidated, Inc. 25,510‌ 567‌ Monster Beverage Corp.(a) 53,451‌ 1,300‌ PepsiCo, Inc. 192,322‌ 1,864‌ The Coca-Cola Co. 103,061‌ 374,344 Biotechnology (1.0%) 1,515‌ AbbVie, Inc. 171,498‌ 252‌ Amgen, Inc. 59,961‌ 225‌ Biogen, Inc.(a) 60,183‌ 450‌ Eagle Pharmaceuticals,Inc.(a) 17,829‌ 589‌ Exact Sciences Corp.(a) 65,102‌ 308‌ Exelixis, Inc.(a) 6,945‌ 439‌ Gilead Sciences, Inc. 29,022‌ 50‌ Moderna, Inc.(a) 9,251‌ 121‌ Neurocrine Biosciences, Inc.(a) 11,643‌ 31‌ Regeneron Pharmaceuticals, Inc.(a) 15,575‌ 347‌ Sage Therapeutics, Inc.(a) 24,151‌ 37‌ Sarepta Therapeutics, Inc.(a) 2,799‌ 125‌ Vertex Pharmaceuticals, Inc.(a) 26,079‌ 500,038 Building Products (0.3%) 266‌ Allegion PLC 37,368‌ 171‌ Carrier Global Corp. 7,854‌ Shares or Principal Amount Security Description Value Common Stocks, continued Building Products, continued: 184‌ CSW Industrials, Inc. $ 22,415‌ 146‌ Lennox International, Inc. 51,090‌ 366‌ Patrick Industries, Inc. 31,366‌ 245‌ Simpson Manufacturing Co, Inc. 27,518‌ 177,611‌ Capital Markets (2.4%) 260‌ Ameriprise Financial, Inc. 67,558‌ 83‌ BlackRock, Inc. 72,794‌ 492‌ CME Group, Inc. 107,630‌ 307‌ Cohen & Steers, Inc. 22,451‌ 658‌ Evercore, Inc. 95,976‌ 1,057‌ GAMCO Investors, Inc., Class A 27,070‌ 221‌ Hamilton Lane, Inc., Class A 19,972‌ 313‌ Houlihan Lokey, Inc. 23,441‌ 526‌ Intercontinental Exchange, Inc. 59,375‌ 395‌ LPL Financial Holdings, Inc. 58,413‌ 10‌ MarketAxess Holdings, Inc. 4,665‌ 73‌ Moody's Corp. 24,481‌ 195‌ MSCI, Inc.,Class A 91,285‌ 414‌ Nasdaq, Inc. 69,328‌ 290‌ PJT Partners, Inc., Class A 21,118‌ 187‌ S&P Global, Inc. 70,961‌ 315‌ Stifel Financial Corp. 21,823‌ 332‌ StoneX Group, Inc.(a) 22,476‌ 329‌ T. Rowe Price Group, Inc. 62,954‌ 147‌ The Bank of New York Mellon Corp. 7,656‌ 213‌ The Charles Schwab Corp. 15,730‌ 637‌ The Goldman Sachs Group, Inc. 236,977‌ 1,204,134‌ Chemicals (0.9%) 578‌ AdvanSix, Inc.(a) 18,299‌ 156‌ Air Products & Chemicals, Inc. 46,747‌ 158‌ Axalta Coating Systems, Ltd.(a) 5,126‌ 1,556‌ CF Industries Holdings, Inc. 82,733‌ 146‌ Chase Corp. 15,476‌ 1‌ Corteva, Inc. 45‌ 1,431‌ Dow, Inc. 97,909‌ 226‌ Ecolab, Inc. 48,608‌ 512‌ Hawkins, Inc. 17,418‌ 159‌ Innospec, Inc. 16,076‌ 465‌ Koppers Holdings, Inc.(a) 16,122‌ 41‌ Linde PLC 12,325‌ 928‌ Olin Corp. 45,370‌ 46‌ PPG Industries, Inc. 8,267‌ 5‌ The Scotts Miracle-Gro Co. 1,087‌ 185‌ Westlake Chemical Corp. 18,661‌ 450,269‌ Commercial Services & Supplies (0.3%) 279‌ Cintas Corp. 98,638‌ 417‌ Waste Management, Inc. 58,663‌ 157,301‌ Communications Equipment (0.6%) 144‌ Arista Networks, Inc.(a) 48,870‌ 2,592‌ Cisco Systems, Inc. 137,117‌ 356‌ Palo Alto Networks, Inc.(a) 129,317‌ 315,304‌ Construction & Engineering (0.4%) 616‌ Jacobs Engineering Group, Inc. 87,521‌ 681‌ Primoris Services Corp. 21,649‌ 867‌ Quanta Services, Inc. 82,668‌ See notes to the schedule of portfolio investments. - 22 - Schedule of Portfolio Investments Active Core Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Common Stocks, continued Construction & Engineering, continued: 1,013‌ Sterling Construction Co, Inc.(a) $ 22,793‌ 214,631‌ Construction Materials (0.1%) 177‌ Vulcan Materials Co. 32,448‌ Consumer Finance (0.3%) 382‌ Capital One Financial Corp. 61,418‌ 663‌ Enova International, Inc.(a) 25,108‌ 587‌ Onemain Holdings, Inc. 33,952‌ 615‌ Synchrony Financial 29,157‌ 157‌ World Acceptance Corp.(a) 25,216‌ 174,851‌ Containers & Packaging (0.5%) 317‌ Amcor PLC 3,741‌ 263‌ AptarGroup, Inc. 38,742‌ 688‌ Ball Corp. 56,526‌ 1,346‌ Berry Global Group, Inc.(a) 91,811‌ 222‌ Packaging Corp. of America 33,000‌ 669‌ Silgan Holdings, Inc. 28,185‌ 327‌ UFP Technologies, Inc.(a) 17,802‌ 269,807‌ Distributors (0.1%) 192‌ Genuine Parts Co. 25,175‌ 65‌ Pool Corp. 28,376‌ 53,551‌ Diversified Consumer Services (0.3%) 113‌ Bright Horizons Family Solutions, Inc.(a) 15,620‌ 476‌ Chegg, Inc.(a) 36,609‌ 152‌ H&R Block, Inc. 3,773‌ 1,758‌ Perdoceo Education Corp.(a) 21,430‌ 1,209‌ Stride, Inc.(a) 32,498‌ 465‌ Terminix Global Holdings, Inc.(a) 22,943‌ 132,873‌ Diversified Financial Services (0.5%) 499‌ Berkshire Hathaway, Inc., Class B(a) 144,430‌ 2,259‌ Jefferies Financial Group, Inc. 72,582‌ 357‌ Voya Financial, Inc. 23,391‌ 240,403‌ Diversified Telecommunication Services (0.5%) 3,223‌ AT&T, Inc. 94,853‌ 2,800‌ Verizon Communications, Inc. 158,172‌ 253,025‌ Electric Utilities (0.7%) 95‌ American Electric Power Co., Inc. 8,170‌ 75‌ Duke Energy Corp. 7,516‌ 249‌ Exelon Corp. 11,235‌ 1,498‌ NextEra Energy, Inc. 109,683‌ 500‌ OGE Energy Corp. 17,250‌ 397‌ Otter Tail Corp. 19,044‌ 686‌ Pinnacle West Capital Corp. 58,022‌ 2,373‌ PPL Corp. 69,078‌ 3,000‌ Spark Energy, Inc., Class A 31,170‌ 87‌ Xcel Energy, Inc. 6,167‌ 337,335‌ Electrical Equipment (0.6%) 162‌ Acuity Brands, Inc. 30,091‌ 519‌ Emerson Electric Co. 49,663‌ 225‌ Generac Holdings,Inc.(a) 73,962‌ 580‌ Regal-Beloit Corp. 82,493‌ 66‌ Rockwell Automation, Inc. 17,406‌ 1,107‌ Vertiv Holdings Co. 27,476‌ 281,091‌ Shares or Principal Amount Security Description Value Common Stocks, continued Electronic Equipment, Instruments & Components (0.9%) 1,254‌ Amphenol Corp., Class A $ 84,344‌ 608‌ CDW Corp. 100,576‌ 2,932‌ Corning, Inc. 127,923‌ 485‌ Keysight Technologies, Inc.(a) 69,054‌ 1,157‌ Kimball Electronics, Inc.(a) 25,894‌ 245‌ National Instruments Corp. 9,996‌ 803‌ Sanmina Corp.(a) 33,814‌ 451,601‌ Energy Equipment & Services (0.2%) 572‌ Cactus, Inc., Class A 20,043‌ 1,506‌ National Energy Services Reunited Corp.(a) 19,322‌ 2,166‌ Schlumberger NV 67,861‌ 107,226‌ Entertainment (0.7%) 365‌ Activision Blizzard, Inc. 35,496‌ 1,122‌ Lions Gate Entertainment Corp., Class A(a) 21,857‌ 165‌ Netflix, Inc.(a) 82,964‌ 55‌ Spotify Technology SA(a) 13,286‌ 248‌ Take-Two Interactive Software, Inc.(a) 46,019‌ 666‌ The Walt Disney Co.(a) 118,981‌ 2,797‌ Zynga,Inc.,Class A(a) 30,319‌ 348,922‌ Equity Real Estate Investment Trusts (2.1%) 1,058‌ American Homes 4 Rent, Class A 40,278‌ 165‌ American Tower Corp. 42,151‌ 869‌ Care Trust REIT, Inc. 20,230‌ 489‌ Corporate Office Properties Trust 13,496‌ 889‌ Crown Castle International Corp. 168,466‌ 1,127‌ CubeSmart 49,351‌ 828‌ Digital Reality Trust, Inc. 125,492‌ 965‌ Duke Realty Corp. 44,834‌ 18‌ Equinix, Inc. 13,261‌ 411‌ Equity LifeStyle Properties, Inc. 29,123‌ 310‌ Equity Residential 24,009‌ 331‌ Extra Space Storage, Inc. 49,587‌ 1,473‌ Getty Realty Corp. 45,854‌ 686‌ Host Hotels & Resorts, Inc.(a) 11,779‌ 91‌ Innovative Industrial Properties,Inc. 16,401‌ 1,358‌ Lamar Advertising Co. 142,346‌ 374‌ PotlatchDeltic Corp. 22,515‌ 390‌ Prologis, Inc. 45,958‌ 135‌ PS Business Parks, Inc. 20,920‌ 167‌ Public Storage 47,174‌ 50‌ SBA Communications Corp. 14,906‌ 46‌ Simon Property Group, Inc. 5,911‌ 252‌ SL Green Realty Corp. 19,963‌ 333‌ Welltower, Inc. 24,898‌ 1,038,903‌ Food & Staples Retailing (0.8%) 390‌ BJ's Wholesale Club Holdings, Inc.(a) 17,468‌ 280‌ Costco Wholesale Corp. 105,915‌ 320‌ Ingles Markets, Inc., Class A 19,821‌ 1,224‌ Sysco Corp. 99,144‌ 152‌ The Kroger Co. 5,621‌ 145‌ Walgreens Boots Alliance, Inc. 7,636‌ 1,089‌ Wal-Mart Stores, Inc. 154,671‌ 410,276‌ Food Products (0.5%) 121‌ General Mills, Inc. 7,606‌ 456‌ Ingredion, Inc. 43,288‌ 350‌ Kellogg Co. 22,922‌ See notes to the schedule of portfolio investments. - 23 - Schedule of Portfolio Investments Active Core Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Common Stocks, continued Food Products, continued: 165‌ Lamb Weston Holdings, Inc. $ 13,611‌ 93‌ Lancaster Colony Corp. 17,360‌ 1,577‌ Mondelez International, Inc., Class A 100,187‌ 180‌ The Hershey Co. 31,149‌ 236,123‌ Gas Utilities (0.1%) 666‌ UGI Corp. 30,669‌ Health Care Equipment & Supplies (1.9%) 1,081‌ Abbott Laboratories 126,099‌ 15‌ ABIOMED, Inc.(a) 4,269‌ 69‌ Align Technology, Inc.(a) 40,720‌ 674‌ Baxter International, Inc. 55,349‌ 246‌ Becton Dickinson & Co. 59,505‌ 683‌ Danaher Corp. 174,944‌ 32‌ DexCom, Inc.(a) 11,820‌ 427‌ Edwards Lifesciences Corp.(a) 40,949‌ 607‌ Hill-Rom Holdings, Inc. 67,547‌ 904‌ Hologic, Inc.(a) 57,006‌ 131‌ IDEXX Laboratories, Inc.(a) 73,112‌ 477‌ Medtronic PLC 60,383‌ 997‌ Quidel Corp.(a) 117,756‌ 15‌ ResMed, Inc. 3,088‌ 54‌ STERIS PLC 10,306‌ 33‌ Teleflex, Inc. 13,272‌ 39‌ The Cooper Cos, Inc. 15,345‌ 1,116‌ Zynex, Inc.(a) 16,986‌ 948,456‌ Health Care Providers & Services (1.4%) 744‌ Adapthealth Corp.(a) 19,485‌ 315‌ AMN Healthcare Services, Inc.(a) 27,940‌ 450‌ Anthem, Inc. 179,199‌ 96‌ Chemed Corp. 47,169‌ 388‌ CVS Health Corp. 33,539‌ 9‌ Guardant Health, Inc.(a) 1,117‌ 32‌ HCA Healthcare, Inc. 6,873‌ 528‌ Joint Corp. (The)(a) 37,530‌ 180‌ Molina Healthcare, Inc.(a) 45,245‌ 385‌ National Research Corp. 18,415‌ 307‌ Quest Diagnostics,Inc. 40,423‌ 838‌ Select Medical Holdings Corp. 33,579‌ 281‌ The Ensign Group, Inc. 23,379‌ 411‌ UnitedHealth Group, Inc. 169,299‌ 683,192‌ Health Care Technology (0.3%) 779‌ Computer Programs & System, Inc. 25,216‌ 202‌ Teladoc Health, Inc.(a) 30,417‌ 292‌ Veeva Systems, Inc.(a) 85,072‌ 140,705‌ Hotels, Restaurants & Leisure (2.2%) 551‌ Darden Restaurants, Inc. 78,920‌ 803‌ DraftKings, Inc., Class A(a) 40,110‌ 114‌ Hilton Worldwide Holdings, Inc.(a) 14,281‌ 170‌ McDonald's Corp. 39,761‌ 22,000‌ Norwegian Cruise Line Holdings, Ltd.(a) 701,800‌ 370‌ Six Flags Entertainment Corp.(a) 16,809‌ 1,635‌ Starbucks Corp. 186,194‌ 72‌ Yum China Holdings, Inc. 4,870‌ 119‌ Yum! Brands, Inc. 14,276‌ 1,097,021‌ Household Durables (0.1%) 525‌ Garmin, Ltd. 74,676‌ Shares or Principal Amount Security Description Value Common Stocks, continued Household Products (0.4%) 356‌ Central Garden & Pet Co.(a) $ 19,555‌ 320‌ Church & Dwight Co, Inc. 27,434‌ 493‌ Colgate-Palmolive Co. 41,303‌ 67‌ Kimberly-Clark Corp. 8,752‌ 163‌ The Clorox Co. 28,807‌ 647‌ The Procter & Gamble Co. 87,248‌ 213,099‌ Independent Power and Renewable Electricity Producers (0.0%^) 909‌ AES Corp. 23,097‌ 12‌ NRG Energy, Inc. 386‌ 23,483‌ Industrial Conglomerates (0.6%) 1,111‌ 3M Co. 225,577‌ 93‌ Carlisle Cos, Inc. 17,886‌ 257‌ Honeywell International, Inc. 59,344‌ 54‌ Roper Technologies, Inc. 24,301‌ 327,108‌ Insurance (1.3%) 96‌ AON PLC, Class A. 24,324‌ 213‌ Athene Holdings, Ltd. Class A(a) 13,340‌ 874‌ Brighthouse Financial, Inc.(a) 42,529‌ 27‌ Chubb, Ltd. 4,590‌ 132‌ Cincinnati Financial Corp. 16,066‌ 1,106‌ FNF Group 51,971‌ 1,956‌ Heritage Insurance Holdings 16,293‌ 80‌ Marsh & McLennan Cos., Inc. 11,068‌ 1,931‌ Prudential Financial, Inc. 206,559‌ 395‌ The Allstate Corp. 53,961‌ 165‌ The Hanover Insurance Group, Inc. 23,016‌ 1,087‌ The Hartford Financial Services Group, Inc. 71,035‌ 203‌ The Progressive Corp. 20,113‌ 46‌ Travelers Companies, Inc. 7,346‌ 3,033‌ Unum Group 93,932‌ 656,143‌ Interactive Media & Services (2.1%) 110‌ Alphabet, Inc., Class A(a) 259,253‌ 139‌ Alphabet, Inc., Class C(a) 335,207‌ 710‌ Cargurus, Inc.(a) 20,036‌ 1,062‌ Facebook, Inc., Class A(a) 349,111‌ 475‌ Snap, Inc, Class A(a) 29,507‌ 497‌ Yelp, Inc.(a) 19,935‌ 735‌ ZoomInfo Technologies, Inc., Class A(a) 32,215‌ 1,045,264‌ Internet & Direct Marketing Retail (3.1%) 189‌ Amazoncom, Inc.(a) 609,160‌ 307‌ Booking Holdings, Inc.(a) 724,996‌ 405‌ eBay, Inc. 24,656‌ 328‌ Etsy, Inc.(a) 54,031‌ 847‌ Expedia Group, Inc.(a) 149,877‌ 1,562,720‌ IT Services (2.1%) 272‌ Accenture PLC, Class A 76,748‌ 30‌ Akamai Technologies, Inc.(a) 3,426‌ 819‌ Alliance Data Systems Corp. 99,140‌ 119‌ Automatic Data Processing, Inc. 23,327‌ 82‌ Booz Allen Hamilton Holding Corp. 6,964‌ 96‌ CACI International, Inc., Class A(a) 24,476‌ 612‌ CSG Systems International, Inc. 26,953‌ 774‌ DXC Technology Co.(a) 29,350‌ 192‌ Fidelity National Information Services, Inc. 28,604‌ 94‌ Fiserv, Inc.(a) 10,829‌ See notes to the schedule of portfolio investments. - 24 - Schedule of Portfolio Investments Active Core Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Common Stocks, continued IT Services, continued: 1,751‌ Hackett Group, Inc. (The) $ 31,185‌ 381‌ International Business Machines Corp. 54,765‌ 21‌ Jack Henry & Associates, Inc. 3,237‌ 188‌ Leidos Holdings, Inc. 19,317‌ 516‌ MasterCard, Inc., Class A. 186,059‌ 96‌ Okta,Inc.(a) 21,354‌ 191‌ Paychex, Inc. 19,318‌ 263‌ Paypal Holdings, Inc.(a) 68,385‌ 434‌ The Western Union Co. 10,620‌ 352‌ TTEC Holdings, Inc. 38,160‌ 56‌ Twilio, Inc., Class A(a) 18,816‌ 643‌ VeriSign, Inc.(a) 141,409‌ 589‌ Visa, Inc., Class A 133,880‌ 1,076,322‌ Leisure Products (0.3%) 191‌ Hasbro, Inc. 18,330‌ 1,040‌ Peloton Interactive, Inc., Class A(a) 114,723‌ 345‌ YETI Holdings, Inc.(a) 30,222‌ 163,275‌ Life Sciences Tools & Services (1.1%) 845‌ Agilent Technologies, Inc. 116,720‌ 15‌ Bio-Techne Corp. 6,207‌ 74‌ Charles River Laboratories International, Inc.(a) 25,011‌ 81‌ Illumina, Inc.(a) 32,857‌ 495‌ Iqvia Holdings, Inc.(a) 118,879‌ 149‌ Medpace Holdings, Inc.(a) 24,892‌ 32‌ Mettler-Toledo International, Inc.(a) 41,630‌ 292‌ Thermo Fisher Scientific, Inc. 137,094‌ 130‌ Waters Corp.(a) 41,893‌ 545,183‌ Machinery (1.3%) 1,571‌ Allison Transmission Holdings, Inc. 66,469‌ 108‌ Caterpillar, Inc. 26,037‌ 56‌ Deere & Co. 20,221‌ 296‌ DMC Global, Inc.(a) 15,679‌ 148‌ Dover Corp. 22,274‌ 1,755‌ Fortive Corp. 127,273‌ 345‌ Graco, Inc. 26,123‌ 1,749‌ Hillenbrand, Inc. 79,754‌ 306‌ IDEX Corp. 68,134‌ 189‌ Illinois Tool Works, Inc. 43,803‌ 142‌ ITT, Inc. 13,334‌ 762‌ Meritor,Inc. (a) 19,812‌ 153‌ Omega Flex, Inc. 22,499‌ 81‌ Otis Worldwide Corp. 6,345‌ 68‌ PACCAR, Inc. 6,226‌ 501‌ The Timken Co. 44,313‌ 281‌ The Toro Co. 31,216‌ 639,512‌ Media (0.8%) 104‌ Altice USA, Inc., Class A(a) 3,750‌ 6‌ Cable One, Inc. 10,893‌ 3,654‌ Comcast Corp., Class A 209,521‌ 635‌ Discovery, Inc., Class C(a) 19,082‌ 1,241‌ DISH Network Corp., Class A(a) 54,008‌ 1,949‌ Gray Television, Inc. 45,334‌ 1,131‌ MSG Networks, Inc., Class A(a) 17,440‌ 231‌ TechTarget, Inc.(a) 16,242‌ 2,039‌ TEGNA, Inc. 39,536‌ 415,806‌ Shares or Principal Amount Security Description Value Common Stocks, continued Metals & Mining (0.3%) 619‌ Commercial Metals Co. $ 19,480‌ 407‌ Newmont Mining Corp. 29,907‌ 171‌ Reliance Steel & Aluminum Co. 28,740‌ 945‌ Rio Tinto PLC ADR 82,621‌ 160,748‌ Mortgage Real Estate Investment Trusts (0.2%) 5,392‌ AGNC Investment Corp. 99,968‌ 1,542‌ New Residential Investment Corp. 16,314‌ 116,282‌ Multiline Retail (0.2%) 218‌ Dollar General Corp. 44,245‌ 293‌ Target Corp. 66,488‌ 110,733‌ Multi-Utilities (0.3%) 274‌ Black Hills Corp. 18,026‌ 429‌ CenterPoint Energy, Inc. 10,854‌ 55‌ CMS Energy Corp. 3,451‌ 345‌ MDU Resources Group, Inc. 11,613‌ 275‌ NorthWestern Corp. 17,421‌ 546‌ Public Service Enterprise Group, Inc. 33,917‌ 383‌ WEC Energy Group, Inc. 35,968‌ 131,250‌ Oil, Gas & Consumable Fuels (1.3%) 1,983‌ Antero Midstream Corp. 19,037‌ 737‌ Chevron Corp. 76,493‌ 722‌ Cimarex Energy Co. 48,916‌ 256‌ ConocoPhillips 14,269‌ 261‌ Diamondback Energy, Inc. 20,898‌ 1,468‌ Dorian LPG, Ltd.(a) 20,860‌ 593‌ EQT Corp.(a) 12,382‌ 1,208‌ Equitrans Midstream Corp. 9,954‌ 1,366‌ Exxon Mobil Corp. 79,733‌ 2,090‌ ONEOK, Inc. 110,227‌ 1,314‌ Phillips 66 110,665‌ 329‌ Pioneer Natural Resources Co. 50,071‌ 412‌ Renewable Energy Group, Inc.(a) 25,161‌ 1,078‌ World Fuel Services Corp. 33,127‌ 631,793‌ Paper & Forest Products (0.1%) 475‌ Boise Cascade Co. 31,345‌ 386‌ Clearwater Paper Corp.(a) 11,013‌ 42,358‌ Personal Products (0.1%) 63‌ Medifast, Inc. 20,932‌ 962‌ Nature's Sunshine Products, Inc. 19,711‌ 44‌ The Estee Lauder Cos., Inc., Class A 13,487‌ 177‌ USANA Health Sciences, Inc.(a) 18,716‌ 72,846‌ Pharmaceuticals (1.4%) 1,013‌ Bristol-Myers Squibb Co. 66,575‌ 773‌ Corcept Therapeutics, Inc.(a) 16,697‌ 429‌ Eli Lilly & Co. 85,689‌ 1,743‌ Innoviva, Inc.(a) 23,443‌ 1,586‌ Johnson & Johnson 268,431‌ 980‌ Merck & Co., Inc. 74,372‌ 2,347‌ Pfizer, Inc. 90,899‌ 665‌ Supernus Pharmaceuticals, Inc.(a) 19,850‌ 327‌ Zoetis, Inc. 57,774‌ 703,730‌ Professional Services (0.3%) 6‌ CoStar Group, Inc.(a) 5,124‌ See notes to the schedule of portfolio investments. - 25 - Schedule of Portfolio Investments Active Core Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Common Stocks, continued Professional Services, continued: 164‌ FTI Consulting, Inc.(a) $ 22,558‌ 472‌ Kforce, Inc. 29,599‌ 252‌ ManpowerGroup, Inc. 30,489‌ 1,434‌ Mastech Digital, Inc.(a) 22,600‌ 230‌ Robert Half International, Inc. 20,422‌ 25‌ Verisk Analytics, Inc., Class A 4,321‌ 135,113‌ Real Estate Management & Development (0.2%) 605‌ Exp World Holdings, Inc.(a) 19,517‌ 969‌ Re/MAX Holdings, Inc. 33,925‌ 966‌ The RMR Group, Inc., Class A 37,790‌ 91,232‌ Road & Rail (0.7%) 414‌ ArcBest Corp. 32,226‌ 333‌ JB Hunt Transport Services, Inc. 57,123‌ 601‌ Lyft, Inc., Class A(a) 34,311‌ 280‌ Old Dominion Freight Line, Inc. 74,326‌ 1,262‌ Uber Technologies, Inc.(a) 64,147‌ 398‌ Union Pacific Corp. 89,443‌ 351,576‌ Semiconductors & Semiconductor Equipment (2.5%) 339‌ Advanced Micro Devices, Inc.(a) 27,147‌ 1,199‌ Amkor Technology, Inc. 25,299‌ 509‌ Broadcom, Inc. 240,416‌ 30‌ Entegris, Inc. 3,433‌ 1,279‌ Infineon Technologies AG ADR 51,787‌ 1,449‌ Intel Corp. 82,767‌ 134‌ KLA-Tencor Corp. 42,463‌ 203‌ Lam Research Corp. 131,919‌ 311‌ Microchip Technology, Inc. 48,811‌ 677‌ Micron Technology, Inc.(a) 56,963‌ 141‌ NVIDIA Corp. 91,619‌ 249‌ NXP Semiconductors NV 52,644‌ 1,241‌ ON Semiconductor Corp.(a) 49,690‌ 310‌ Power Integrations, Inc. 25,479‌ 507‌ Qorvo, Inc.(a) 92,639‌ 108‌ QUALCOMM, Inc. 14,530‌ 216‌ Skyworks Solutions, Inc. 36,720‌ 751‌ Texas Instruments, Inc. 142,555‌ 383‌ Xilinx, Inc. 48,641‌ 1,265,522‌ Software (3.6%) 207‌ Adobe, Inc.(a) 104,448‌ 310‌ Alarm.com Holdings, Inc.(a) 25,383‌ 691‌ Anaplan, Inc.(a) 35,593‌ 169‌ Appfolio, Inc., Class A(a) 22,796‌ 198‌ Aspen Technology, Inc.(a) 27,021‌ 1,047‌ Cadence Design Systems, Inc.(a) 132,959‌ 379‌ Citrix Systems, Inc. 43,570‌ 19‌ Crowdstrike Holdings, Inc., Class A(a) 4,221‌ 237‌ DocuSign, Inc.(a) 47,784‌ 291‌ Everbridge, Inc.(a) 34,192‌ 17‌ Fair Isaac Corp.(a) 8,603‌ 210‌ Fortinet, Inc.(a) 45,893‌ 374‌ Intuit, Inc. 164,220‌ 362‌ Manhattan Associates, Inc.(a) 49,225‌ 3,143‌ Microsoft Corp. 784,744‌ 951‌ Oracle Corp. 74,882‌ 284‌ Qualys, Inc.(a) 27,457‌ 108‌ RingCentral, Inc., Class A(a) 28,347‌ 61‌ salesforce.com, Inc.(a) 14,524‌ Shares or Principal Amount Security Description Value Common Stocks, continued Software, continued: 13‌ ServiceNow, Inc.(a) $ 6,160‌ 233‌ Zendesk, Inc.(a) 31,842‌ 183‌ Zoom Video Communications, Inc., Class A(a) 60,670‌ 168‌ Zscaler, Inc.(a) 32,626‌ 1,807,160‌ Specialty Retail (1.6%) 178‌ Asbury Automotive Group, Inc.(a) 35,296‌ 740‌ AutoNation, Inc.(a) 75,576‌ 49‌ AutoZone, Inc.(a) 68,923‌ 704‌ Best Buy Co., Inc. 81,833‌ 819‌ Foot Locker, Inc. 51,835‌ 205‌ Lowe's Cos., Inc. 39,940‌ 164‌ O'Reilly Automotive, Inc.(a) 87,760‌ 225‌ Penske Automotive Group, Inc. 19,258‌ 141‌ Ross Stores, Inc. 17,821‌ 577‌ Shoe Carnival, Inc. 38,953‌ 183‌ Sleep Number Corp.(a) 20,403‌ 539‌ The Home Depot, Inc. 171,892‌ 240‌ The TJX Cos., Inc. 16,210‌ 319‌ Williams-Sonoma, Inc. 54,083‌ 138‌ Winmark Corp. 27,023‌ 806,806‌ Technology Hardware, Storage & Peripherals (1.6%) 6,031‌ Apple, Inc. 751,523‌ 649‌ HP, Inc. 18,970‌ 136‌ NetApp, Inc. 10,523‌ 1,843‌ Pure Storage, Inc.(a) 35,109‌ 816,125‌ Textiles, Apparel & Luxury Goods (0.6%) 74‌ Deckers Outdoor Corp.(a) 24,822‌ 2,161‌ Hanesbrands, Inc. 42,226‌ 143‌ Lululemon Athletica, Inc.(a) 46,208‌ 385‌ NIKE, Inc., Class B 52,537‌ 1,605‌ VF Corp. 127,951‌ 293,744‌ Thrifts & Mortgage Finance (0.1%) 427‌ Axos Financial, Inc.(a) 20,244‌ 648‌ Mr Cooper Group, Inc.(a) 22,414‌ 42,658‌ Tobacco (0.1%) 745‌ Altria Group, Inc. 36,669‌ 322‌ Philip Morris International, Inc. 31,050‌ 67,719‌ Trading Companies & Distributors (0.6%) 1,041‌ Air Lease Corp. 48,989‌ 112‌ Fastenal Co. 5,941‌ 3,142‌ H&E Equipment Services, Inc. 117,511‌ 1,171‌ MSC Industrial Direct Co., Inc. 110,542‌ 65‌ Watsco, Inc. 18,941‌ 301,924‌ Water Utilities (0.1%) 218‌ American States Water Co. 17,303‌ 144‌ American Water Works Co., Inc. 22,323‌ 1,255‌ Consolidated Water Co., Ltd. 15,449‌ 1,388‌ Pure Cycle Corp.(a) 19,626‌ 74,701‌ Wireless Telecommunication Services (0.2%) 592‌ T-Mobile US, Inc.(a) 83,738‌ Total Common Stocks (Cost $16,191,330) ‌ 27,540,441 See notes to the schedule of portfolio investments. - 26 - Schedule of Portfolio Investments Active Core Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Asset Backed Securities (4.2%) $ 200,000‌ Amur Equipment Finance Receivables IX LLC, Series 1A, Class C, 1.75%, 6/21/27, Callable 2/20/25 @ 100*(b) $ 200,858‌ 147,867‌ CLI Funding VI LLC, Series 2020-3A, Class A, 2.07%, 10/18/45, Callable 11/18/22 @ 100*(b) 149,664‌ 100,000 ‌DataBank Issuer, Series 2021-1A, Class A2, 2.06%, 2/27/51, Callable 8/25/24 @ 100*(b) 101,067‌ 193,500 ‌DB Master Finance LLC, Series 2017-1A, Class A2I, 3.63%, 11/20/47, Callable 11/20/21 @ 100*(b) 196,364‌ 200,000‌ Domino's Pizza Master Issuer LLC, Series 2021-1A, Class A2I, 2.66%, 4/25/51, Callable 10/25/25 @ 100*(b) 203,208‌ 70,000 Sabey Data Center Issuer LLC, Series 2020-1, Class A2, 3.81%, 3/20/45, Callable 11/20/23 @ 100*(b) 74,622‌ 116,005 ‌Saxon Asset Securities Trust, Series 2003-3, Class A5, 4.48%, 12/25/33, Callable 6/25/21 @ 100*(c)(d) 116,583‌ 195,500 ‌Stack Infrastructure Issuer LLC, Series 2019-1A, Class A2, 4.54%, 2/25/44, Callable 2/25/23 @ 100*(b) 207,743‌ 187,508‌ Textainer Marine Containers VIII, Ltd., Series 2A- A, Class A, 2.10%, 9/20/45, Callable 9/20/22 @ 100*(b) 189,935‌ 197,167 ‌Triton Container Finance VIII LLC, Series 2021-1A, Class A, 1.86%, 3/20/46, Callable 4/20/23 @ 100*(b) 195,526‌ 200,000‌ TRP-TRIP Rail Master Funding LLC, Series 2021-2, Class A, 2.15%, 6/19/51, Callable 6/17/22 @ 100*(b) 200,230‌ 55,082‌ UBS Commercial Mortgage Trust, Series 2018-C10, Class A1, 3.18%, 5/15/51, Callable 3/15/23 @ 100* 56,335‌ 120,000 ‌Willis Engine Structured Trust VI, Series 2021-A, Class A, 3.10%, 5/15/46, Callable 5/15/29 @ 100*(b) 119,994‌ 95,000‌ ZAXBY'S Funding LLC, Series 2021-1A, Class A2, 3.24%, 7/30/51, Callable 7/30/25 @ 100*(b) 95,000‌ Total Asset Backed Securities (Cost $2,082,207) 2,107,129‌ Mortgage Backed Securities† (7.2%) Alt-A - Adjustable Rate Mortgage Backed Securities (0.3%) 152,347‌ Bear Stearns Alternative-A Trust, Series 2007-2, Class 2A1, 2.93%, 4/25/37, Callable 11/25/22 @ 100*(c) 129,665‌ 869‌ Deutsche Mortgage Securities, Inc., Series 2003-4XS, Class A6A, 5.32% (US0003M + 119 bps), 10/25/33, Callable 6/25/21 @ 100*(d) 872‌ 130,537‌ Alt-A - Fixed Rate Mortgage Backed Securities (0.9%) 34,478‌ Bank of America Alternative Loan Trust, Series 2005-10, Class 1CB4, 5.50%, 11/25/35, Callable 6/25/21 @ 100* 34,233‌ 49,110 Citi Mortgage Alternative Loan Trust, Series 2007-A2, Class 1A5, 6.00%, 2/25/37, Callable 4/25/22 @ 100* 49,831‌ 21,093 ‌Countrywide Alternative Loan Trust, Series 2005-53T2, Class 2A4, 5.50%, 11/25/35, Callable 2/25/22 @ 100* 15,197‌ Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued Alt-A - Fixed Rate Mortgage Backed Securities, continued: $ 3,583‌ Countrywide Alternative Loan Trust, Series 2006-8T1, Class 2A3, 5.50%, 4/25/36, Callable 6/25/21 @ 100* $ 3,414‌ 8,994‌ Countrywide Alternative Loan Trust, Series 2006-41CB, Class 2A4, 6.00%, 1/25/37, Callable 10/25/21 @ 100* 7,053‌ 12,861 ‌Countrywide Alternative Loan Trust, Series 2004-J2, Class 2A1, 6.50%, 3/25/34, Callable 6/25/21 @ 100* 13,146‌ 60,625 ‌Deutsche Alternative-A Securities, Inc. Mortgage Loan Trust, Series 2006-AB2, Class A3, 4.97%, 6/25/36, Callable 6/25/21 @ 100*(c). 60,276‌ 3,899‌ Master Alternative Loans Trust, Series 2004-6, Class 10A1, 6.00%, 7/25/34, Callable 6/25/21 @ 100* 4,064‌ 18,081‌ Master Alternative Loans Trust, Series 2004-8, Class 5A1, 6.00%, 9/25/34, Callable 6/25/21 @ 100* 18,717‌ 59,898‌ Master Alternative Loans Trust, Series 2004-3, Class 5A1, 6.50%, 3/25/34, Callable 6/25/21 @ 100* 60,577‌ 17,849‌ Nomura Asset Acceptance Corp., Series 2005-AP1, Class 2A5, 5.36%, 2/25/35, Callable 6/25/21 @ 100*(c)(d) 18,267‌ 14,869‌ Nomura Asset Acceptance Corp., Series 2005-AP2, Class A5, 5.48%, 5/25/35, Callable 6/25/21 @ 100*(c)(d) 9,888‌ 140,158‌ Nomura Asset Acceptance Corp., Series 2006-AF1, Class 1A2, 6.16%, 5/25/36, Callable 6/25/21 @ 100*(c) 44,612‌ 7,228‌ Residential Accredit Loans, Inc., Series 2006-QS5, Class A9, 6.00%, 5/25/36, Callable 6/25/21@100* 6,905‌ 51,081 Residential Asset Securitization Trust, Series 2005-A9, Class A3, 5.50%, 7/25/35, Callable 6/25/21 @ 100* 41,135‌ 33,596‌ Residential Asset Securitization Trust, Series 2006-A2, Class A3, 6.00%, 5/25/36, Callable 3/25/22 @ 100* 20,037‌ 28,156‌ Washington Mutual Mortgage Pass-Through Certificates, Series 2005-5, Class CB14, 5.50%, 7/25/35, Callable 6/25/21 @ 100* 28,012‌ 435,364‌ Prime Adjustable Rate Mortgage Backed Securities (0.7%) 6,774 ‌Bear Stearns Adjustable Rate Mortgage Trust, Series 2004-6, Class 2A2, 3.44%, 9/25/34, Callable 6/25/21 @ 100*(c) 6,593‌ 6,282‌ Chase Mortgage Finance Corp., Series 2007-A2, Class 10A1, 3.34%, 7/25/37, Callable 6/25/21 @ 100*(c) 5,862‌ 257,906 ‌LSTAR Securities Investment, Ltd., Series 2019-4, Class A1, 2.61% (US0001M + 150 bps), 5/1/24(b) 256,571‌ 50,000‌ Mello Warehouse Securitization Trust, Series 2021-1, Class A, 0.81% (US0001M + 70 bps), 2/25/55, Callable 2/25/24 @ 100*(b) 50,060‌ 50,000 ‌Mello Warehouse Securitization Trust, Series 2020-2, Class C, 1.39% (US0001M + 130 bps), 11/25/53, Callable 12/25/23 @ 100*(b). 50,125‌ 369,211‌ See notes to the schedule of portfolio investments. - 27 - Schedule of Portfolio Investments Active Core Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued Prime Fixed Mortgage Backed Securities (0.9%) $ 159,195 American Home Mortgage Investment Trust, Series 2005-2, Class 5A4C, 5.91%, 9/25/35, Callable 6/25/21 @ 100*(c)(d) $ 114,476‌ 16,254 ‌Banc of America Funding Trust, Series 2006-4, Class A14, 6.00%, 7/25/36, Callable 3/25/36 @ 100* 15,464‌ 23,800 ‌CHL Mortgage Pass-Through Trust, Series 2005- 22, Class 2A1, 2.61%, 11/25/35, Callable 6/25/21 @ 100*(c) 22,678‌ 7,824 ‌Citigroup Mortgage Loan Trust, Inc., Series 2005-2, Class 1A4, 2.58%, 5/25/35, Callable 6/25/21 @ 100*(c) 8,078‌ 66,255 ‌Citigroup Mortgage Loan Trust, Inc., Series 2004- NCM1, Class 1A2, 6.50%, 7/25/34, Callable 6/25/21 @ 100* 69,410‌ 20,611 ‌Countrywide Home Loans, Series 2005-J1, Class 1A8, 5.50%, 2/25/35, Callable 6/25/21 @ 100* 20,889‌ 27,521 ‌Countrywide Home Loans, Series 2007-J3, Class A10, 6.00%, 7/25/37, Callable 6/25/21 @ 100* 17,981‌ 42,000‌ Credit Suisse First Boston Mortgage Securities Corp., Series 2005-1, Class 2A1, 5.50%, 2/25/35, Callable 6/25/21 @ 100* 40,678‌ 21,683 ‌Credit Suisse Mortgage Capital Certificates, Series 2006-2, Class 3A1, 6.50%, 3/25/36, Callable 6/25/21 @ 100* 7,957‌ 27,395‌ Flagstar Mortgage Trust, Series 2019-2, Class A3, 3.50%, 12/25/49, Callable 9/25/23 @ 100*(b)(c) 27,485‌ 33,232‌ Galton Funding Mortgage Trust, Series 2017-1, Class A21, 3.50%, 7/25/56, Callable 9/25/28 @ 100*(b)(c) 33,706‌ 10,698 ‌Lehman Mortgage Trust, Series 2005-3, Class 2A3, 5.50%, 1/25/36, Callable 6/25/21 @ 100* 11,425‌ 9,948‌ Residential Asset Mortgage Products, Inc., Series 2004-SL1, Class A7, 7.00%, 11/25/31, Callable 8/25/21 @ 100* 10,143‌ 31,268 ‌Shellpoint Co.-Originator Trust, Series 2017-1, Class A4, 3.50%, 4/25/47, Callable 11/25/22 @ 100*(b)(c) 31,295‌ 36,913‌ Wells Fargo Mortgage Backed Securities Trust, Series 2019-4, Class A3, 3.43%, 9/25/49, Callable 12/25/22 @ 100*(c) 36,986‌ 468,651‌ Subprime Mortgage Backed Securities (0.4%) 75,428‌ Towd Point Mortgage Trust, Series 2017-6, Class A1, 2.75%, 10/25/57, Callable 7/25/24 @ 100*(b)(c) 77,568‌ 46,921‌ Towd Point Mortgage Trust, Series 2018-1, Class A1, 3.00%, 1/25/58, Callable 7/25/25 @ 100*(b)(c) 48,559‌ 92,006‌ Towd Point Mortgage Trust, Series 2018-2, Class A1, 3.25%, 3/25/58, Callable 11/25/25 @ 100*(b)(c) 95,678‌ 221,805‌ U.S. Government Agency Mortgage Backed Securities (4.0%) 44,156‌ Fannie Mae, Series 2013-68, Class 10A1, 1.00%, 3/25/42 43,706‌ Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued U.S. Government Agency Mortgage Backed Securities, continued: $ 41,151 Fannie Mae, Series 2013-18, Class 10A1, 2.00%, 12/25/42 $ 42,285‌ 90,229‌ Fannie Mae, Series 2013-23, Class AB, 2.00%, 2/25/43 93,556‌ 78,270‌ Fannie Mae, Series 2013-74, Class 10A1, 2.25%, 6/25/42(c) 81,029‌ 64,535‌ Fannie Mae, Series 2011-146, Class HE, 2.50%, 10/25/41 66,969‌ 60,521‌ Fannie Mae, Series 2017-43, Class PA, 2.50%, 6/25/47 63,613‌ 142,132‌ Fannie Mae, Series 2017-M5, Class A1, 2.74%, 4/25/29 152,077‌ 39,677‌ Fannie Mae, Series 2010-99, Class JU, 3.00%, 8/25/40 41,488‌ 24,916‌ Fannie Mae, Series 2011-118, Class 10A1, 3.00%, 11/25/41 26,701‌ 28,564‌ Fannie Mae, Series 2015-46, Class MD, 3.00%, 5/25/43 28,927‌ 65,959‌ Fannie Mae, Series 2015-59, Class LM, 3.00%, 7/25/45 69,899‌ 199,441‌ Fannie Mae, Series 2018-M12, Class A1, 3.55%, 2/25/30 223,318‌ 185,131‌ Fannie Mae, Series 2018-M13, Class A1, 3.70%, 3/25/30(c) 210,097‌ 12,535‌ Fannie Mae, Series 2012-16, Class K, 4.00%, 10/25/41 13,429‌ 10,832‌ Fannie Mae, 4.50%, 4/1/35, Pool #814522 11,952‌ 12,402‌ Fannie Mae, 5.50%, 10/1/35, Pool #838584 13,814‌ 808‌ Fannie Mae, 6.00%, 5/1/35, Pool #357778 918‌ 3,000‌ Fannie Mae, Series 1999-18, Class LL, 6.50%, 4/18/29 3,362‌ 22,374‌ Freddie Mac, Series 4146, Class 10A1, 1.50%, 10/15/42 22,849‌ 8,021‌ Freddie Mac, 1.89% (H15T1Y + 172 bps), 6/1/28, Pool #605508 8,067‌ 34,110‌ Freddie Mac, Series 4408, Class GA, 2.00%, 9/15/41 35,056‌ 51,663‌ Freddie Mac, Series 4312, Class 10A1, 2.50%, 12/15/41 53,368‌ 64,867‌ Freddie Mac, Series 4395, Class PA, 2.50%, 4/15/37 67,718‌ 58,861‌ Freddie Mac, Series 4316, Class JY, 3.00%, 1/15/44 62,701‌ 61,856‌ Freddie Mac, Series 4348, Class A, 3.00%, 6/15/39 65,648‌ 76,874‌ Freddie Mac, Series 4486, Class PA, 3.00%, 3/15/44 79,577‌ 121,575‌ Freddie Mac, Series 4668, Class KA, 3.00%, 1/15/55 129,142‌ 40,094‌ Freddie Mac, Series 4683, Class PD, 3.00%, 4/15/46 40,940‌ 905‌ Freddie Mac, 5.50%, 1/1/35, Pool #A30935 1,048‌ 2,810‌ Freddie Mac, Series 2302, Class J, 6.50%, 4/15/31 3,197‌ 4,423‌ Freddie Mac, Series 1443, Class I, 7.50%, 12/15/22, Callable 7/15/21 @ 100* 4,591‌ 1,236‌ Government National Mortgage Assoc., Series 2013-104, Class DC, 2.00%, 4/20/40 1,245‌ See notes to the schedule of portfolio investments. - 28 - Schedule of Portfolio Investments Active Core Fund May 31, 2021 (Unaudited) Continued Shares or Principal Amount Security Description Value Mortgage Backed Securities†, continued U.S. Government Agency Mortgage Backed Securities, continued: $ 67,587‌ Government National Mortgage Assoc., Series 2013-69, 2.00%, 9/20/42 $ 70,143 97,513 Government National Mortgage Assoc., Series 2020-5, Class PE, 3.00%, 9/20/49 100,189 47,710 Government National Mortgage Assoc., Series 2019-85, Class MP, 3.50%, 6/20/49 49,631 526 Government National Mortgage Assoc., 6.00%, 2/20/26, Pool #2166 582 35,081 Government National Mortgage Assoc., 6.31%, 3/20/33, Pool #612258 38,669 3,877 Government National Mortgage Assoc., 7.00%, 7/15/29, Pool #492747 4,255 2,025,756 Total Mortgage Backed Securities (Cost $3,583,420) 3,651,324 Corporate Bonds (12.2%) Aerospace & Defense (0.6%) 275,000 Boeing Co. (The), 3.25%, 2/1/28, Callable 12/1/27 @ 100* 289,566 Airlines (0.4%) 171,297 United Airlines Pass Through Trust, Series 2020-1, Class A, 5.88%, 4/15/29 189,339 Banks (2.0%) 440,000 Bank of America Corp., 3.55% (US0003M + 78 bps), 3/5/24, Callable 3/5/23 @ 100* 464,122 255,000 JPMorgan Chase & Co., 2.52% (SOFR + 204 bps), 4/22/31, Callable 4/22/30 @ 100* 258,796 250,000 Wells Fargo & Co., 3.00%, 10/23/26 271,096 994,014 Capital Markets (0.9%) 250,000 Goldman Sachs Group, Inc., 3.50%, 11/16/26, Callable 11/16/25 @ 100* 273,243 200,000 LSEGA Financing PLC, 1.38%, 4/6/26, Callable 3/6/26 @ 100*(b) 200,959 474,202 Consumer Finance (0.4%) 200,000 Toyota Motor Credit Corp., 1.35%, 8/25/23 204,314 Diversified Financial Services (0.3%) 160,000 National Rural Utilities Cooperative Finance Corp., 3.25%, 11/1/25, Callable 8/1/25 @ 100* 173,987 Diversified Telecommunication Services (0.6%) 328,000 AT&T, Inc., 3.50%, 9/15/53, Callable 3/15/53 @ 100*(b) 311,985 Electric Utilities (0.9%) 210,000 Entergy Mississippi LLC, 3.25%, 12/1/27, Callable 9/1/27 @ 100* 229,279 200,000 Southern California Edison Co., 3.50%, 10/1/23, Callable 7/1/23 @ 100* 211,936 441,215 Entertainment (0.3%) 155,000 The Walt Disney Co., 2.00%, 9/1/29, Callable 6/1/29 @ 100* 154,358 Health Care Providers & Services (1.6%) 225,000 Advocate Health & Hospitals Corp., 2.21%, 6/15/30, Callable 3/15/30 @ 100* 224,696 130,000 Ascension Health, Series B, 2.53%, 11/15/29, Callable 8/15/29 @ 100* 134,857 215,000 Partners Healthcare Syst, Inc., Series 2020, 3.19%, 7/1/49, Callable 1/1/49 @ 100* 220,972 Shares or Principal Amount Security Description Value Corporate Bonds, continued Health Care Providers & Services, continued: $ 180,000 Sutter Health, 3.70%, 8/15/28, Callable 5/15/28 @ 100* $ 198,976 779,501 Hotels, Restaurants & Leisure (1.2%) 290,000 Hyatt Hotels Corp., 4.38%, 9/15/28, Callable 6/15/28 @ 100* 316,465 85,000 Royal Caribbean Cruises, 5.25%, 11/15/22 87,789 190,000 Starbucks Corp., 3.75%, 12/1/47, Callable 6/1/47 @ 100* 200,195 604,449 Insurance (0.4%) 200,000 Jackson National Life Global Funding, 2.65%, 6/21/24 (b) 210,715 Internet & Direct Marketing Retail (0.4%) 200,000 Expedia Group, Inc., 3.80%, 2/15/28, Callable 11/15/27 @ 100* 215,604 Oil, Gas & Consumable Fuels (0.4%) 180,000 Marathon Oil Corp., 4.40%, 7/15/27, Callable 4/15/27 @ 100* 202,445 Semiconductors & Semiconductor Equipment (0.9%) 325,000 Broadcom, Inc., 4.75%, 4/15/29, Callable 1/15/29 @ 100* 371,976 70,000 Intel Corp., 3.25%, 11/15/49, Callable 5/15/49 @ 100* 71,106 443,082 Specialty Retail (0.5%) 220,000 Lowe's Cos., Inc., 4.50%, 4/15/30, Callable 1/15/30 @ 100* 257,197 Technology Hardware, Storage & Peripherals (0.4%) 200,000 Apple, Inc., 3.20%, 5/11/27, Callable 2/11/27 @ 100* 220,971 Total Corporate Bonds (Cost $5,980,688) 6,166,944 Taxable Municipal Bonds (6.8%) Massachusetts (0.5%) 250,000 Massachusetts State College Building Authority Revenue, Series C, 2.44%, 5/1/28, ST APPROP 264,628 Michigan (1.4%) 240,000 County of Jackson Michigan, GO, 3.73%, 12/1/30, Continuously Callable @ 100 261,426 210,000 Houghton-Portage Township School District, GO, Series B, 2.70%, 5/1/25, Insured by: Q-SBLF 224,203 200,000 Michigan State Housing Development Authority Revenue, Series B, 2.96%, 12/1/35, Continuously Callable @ 100 202,463 688,092 New York (0.5%) 225,000 New York City Housing Development Corp. Revenue, Class L, 2.79%, 5/1/28, Continuously Callable @ 100 236,988 Ohio (0.7%) 330,000 County of Cuyahoga Ohio Revenue, 3.48%, 7/1/32, Continuously Callable @ 100 352,113 Oklahoma (0.8%) 200,000 The University of Oklahoma Revenue, 1.88%, 7/1/28 201,406 200,000 The University of Oklahoma Revenue, Series C, 2.45%, 7/1/32, Continuously Callable @ 100 201,087 402,493 See notes to the schedule of portfolio investments. - 29 - Schedule of Portfolio Investments Active Core Fund May 31, 2021 (Unaudited) Concluded Shares or Principal Amount Security Description Value Taxable Municipal Bonds, continued Rhode Island (0.4%) $ 225,000 Rhode Island Convention Center Authority Revenue, 3.15%, 5/15/25 $ 231,830 Texas (1.5%) 360,000 County of Burnet Texas, GO, 4.20%, 3/1/34, Pre-refunded 3/1/24 @ 100 396,563 350,000 Schertz-Cibolo-Universal City Independent School District, GO, 0.93%, 2/1/26, PSF-GTD. 346,671 743,234 Utah (0.5%) 250,000 Utah Transit Authority Revenue, 2.04%, 12/15/31, Continuously Callable @ 100 249,784 Washington (0.5%) 250,000 Pierce County School District No 10 Tacoma, GO, 1.73%, 12/1/31, SCH BD GTY 248,549 Total Taxable Municipal Bonds (Cost $3,309,733) 3,417,711 U.S. Government Agency Securities (1.1%) Federal Home Loan Banks 195,000 0.65%, 4/28/26, Callable 7/28/21 @ 100*(c) 195,070 Shares or Principal Amount Security Description Value U.S. Government Agency Securities, continued Federal Home Loan Banks, continued: $ 150,000 1.00%, 4/28/31, Callable 7/28/21 @ 100*(c) $ 150,004 200,000 1.30%, 3/17/27, Callable 6/17/21 @ 100* 199,513 Total U.S. Government Agency Securities (Cost $545,000) 544,587 U.S. Treasury Obligations (6.4%) U.S. Treasury Notes 667,000 1.13%, 2/15/31 639,174 1,189,000 1.38%, 10/15/22 1,209,529 597,000 2.00%, 4/30/24 626,570 704,000 2.25%, 2/15/27 753,802 Total U.S. Treasury Obligations (Cost $3,188,145) 3,229,075 Investment Companies (4.1%) 19,002 iShares MSCI EAFE Index Fund ETF, 1.92% 1,535,932 8,000 iShares MSCI Japan ETF, 1.02% 548,640 Total Investment Companies (Cost $1,369,306) 2,084,572 Investment in Affiliates (3.7%) 1,382,978 Cavanal Hill Government Securities Money Market Fund, Select Shares, 0.01%(e) 1,382,978 52,409 Cavanal Hill World Energy Fund, Institutional Shares 495,653 Total Investment in Affiliates (Cost $1,872,514) 1,878,631 Total Investments (Cost $38,122,343) - 100.3% 50,620,414 Liabilities in excess of other assets — (0.3)% (169,205 ) Net Assets - 100.0% $ 50,451,209 (a) Non-income producing security. (b) Represents a restricted security, purchased under Rule 144A, Section 4(2), which is exempt from registration under the Securities Act of 1933, as amended. The security has been deemed liquid according to the policies and procedures adopted by the Board of Trustees. (c) The rate for certain asset-backed and mortgage-backed securities may vary based on factors relating to the pool of assets underlying the security. The rate presented is the rate in effect at May 31, 2021. (d) Step Bond: Coupon rate is set for an initial period and then increased to a higher coupon rate at a specified date. The rate shown is the rate in effect at May 31, 2021. (e) Money market investment. The rate presented on the Schedule of Portfolio Investments is the rate in effect at May 31, 2021. * Represents next call date. Additional subsequent call dates and amounts may apply to this security. ^ Represents less than 0.05%. † Mortgage backed securities are classified based on the characteristics of their underlying collateral, the fixed vs. variable nature of the obligations, and the credit standing of the mortgagors. The fixed or variable rate nature of securities interest payments to which the fund is entitled may not coincide with the payment nature of the collateral underlying the securities. ADR American Depositary Receipt ETF Exchange Traded Fund GO General Obligation H15T1Y 1 Year Treasury Constant Maturity Rate LIBOR London Interbank Offered Rate PSF-GTD Public School Fund Guaranteed Q-SBLF Qualified School Bond Loan Fund REIT Real Estate Investment Trust SCH BD GTY School Board Guaranty SOFR Secured Overnight Financing Rate US0001M 1 Month US Dollar LIBOR US0003M 3 Month US Dollar LIBOR See notes to the schedule of portfolio investments. - 30 - Schedule of Portfolio Investments Mid Cap Diverse Leadership Fund May 31, 2021 (Unaudited) Shares Security Description Value Common Stocks (91.6%) Airlines (0.5%) 307 JetBlue Airways Corp.(a) $ 6,171 Auto Components (2.1%) 190 BorgWarner, Inc. 9,745 240 Gentex Corp. 8,520 42 Lear Corp. 8,121 26,386 Banks (2.0%) 83 East West Bancorp, Inc. 6,206 19 SVB Financial Group(a) 11,075 77 Western Alliance Bancorp 7,701 24,982 Biotechnology (0.7%) 53 Exact Sciences Corp.(a) 5,858 28 Neurocrine Biosciences, Inc.(a) 2,694 10 Sarepta Therapeutics, Inc.(a) 757 9,309 Building Products (0.7%) 24 Lennox International, Inc. 8,398 Capital Markets (2.9%) 80 LPL Financial Holdings, Inc. 11,830 35 MSCI, Inc., Class A 16,385 47 Nasdaq, Inc. 7,871 36,086 Chemicals (1.1%) 214 Axalta Coating Systems, Ltd.(a) 6,942 38 Celanese Corp., Class A 6,287 13,229 Commercial Services & Supplies (1.6%) 57 Cintas Corp. 20,152 Communications Equipment (1.1%) 39 Arista Networks, Inc.(a) 13,236 Construction & Engineering (1.2%) 150 Quanta Services, Inc. 14,302 Construction Materials (0.7%) 48 Vulcan Materials Co. 8,799 Consumer Finance (0.6%) 166 Synchrony Financial 7,870 Containers & Packaging (1.5%) 39 Aptar Group, Inc. 5,745 187 Berry Global Group, Inc.(a) 12,755 18,500 Diversified Consumer Services (0.5%) 131 Terminix Global Holdings, Inc.(a) 6,464 Diversified Financial Services (0.5%) 98 Voya Financial, Inc. 6,421 Diversified Telecommunication Services (0.1%) 124 Lumen Technologies, Inc. 1,716 Electric Utilities (1.1%) 41 Alliant Energy Corp. 2,343 282 PPL Corp. 8,209 46 Xcel Energy, Inc. 3,261 13,813 Electrical Equipment (3.1%) 44 Acuity Brands, Inc. 8,173 30 Generac Holdings,Inc.(a) 9,861 142 Regal-Beloit Corp. 20,197 38,231 Electronic Equipment, Instruments & Components (1.6%) 122 CDW Corp. 20,181 Energy Equipment & Services (2.0%) 1,018 Baker Hughes Co. 24,839 Entertainment (2.8%) 313 Lions Gate Entertainment Corp.,Class A(a) 6,097 Shares Security Description Value Common Stocks, continued Entertainment, continued: 15 Spotify Technology SA(a) $ 3,624 37 Take-TwoInteractive Software, Inc.(a) 6,866 1,697 Zynga, Inc., Class A(a) 18,395 34,982 Equity Real Estate Investment Trusts (6.1%) 175 American Homes 4 Rent, Class A 6,662 342 CubeSmart 14,976 268 Duke Realty Corp. 12,451 115 Equity LifeStyle Properties, Inc. 8,149 78 Extra Space Storage, Inc. 11,685 90 Lamar Advertising Co. 9,434 73 SL Green Realty Corp. 5,783 89 Welltower, Inc. 6,655 75,795 Food Products (1.2%) 93 Ingredion, Inc. 8,828 35 Kellogg Co. 2,292 46 Lamb Weston Holdings, Inc. 3,795 14,915 Gas Utilities (0.7%) 190 UGI Corp. 8,749 Health Care Equipment & Supplies (5.6%) 20 Align Technology, Inc.(a) 11,803 78 Hill-Rom Holdings, Inc. 8,680 166 Hologic, Inc.(a) 10,468 26 IDEXX Laboratories, Inc.(a) 14,511 25 Teleflex, Inc. 10,055 42 West Pharmaceutical Services, Inc. 14,595 70,112 Health Care Providers & Services (1.1%) 9 Chemed Corp. 4,422 37 Molina Healthcare,Inc.(a) 9,300 13,722 Health Care Technology (1.5%) 62 Veeva Systems, Inc.(a) 18,063 Hotels, Restaurants & Leisure (2.8%) 81 Darden Restaurants, Inc. 11,602 185 Hilton World wide Holdings, Inc.(a) 23,175 34,777 Household Products (1.1%) 78 Church & Dwight Co., Inc. 6,687 37 The Clorox Co. 6,539 13,226 Independent Power and Renewable Electricity Producers (0.5%) 249 AES Corp. 6,327 Insurance (3.8%) 174 Brighthouse Financial, Inc.(a) 8,467 173 FNF Group 8,129 28 The Hanover Insurance Group, Inc. 3,906 105 The Hartford Financial Services Group, Inc. 6,862 656 Unum Group 20,316 47,680 Internet & Direct Marketing Retail (1.7%) 131 Etsy, Inc.(a) 21,580 IT Services (7.0%) 236 Alliance Data Systems Corp. 28,568 215 DXC Technology Co.(a) 8,153 83 Leidos Holdings, Inc. 8,528 43 MongoDB, Inc.(a) 12,553 20 Okta,Inc.(a) 4,449 15 Twilio, Inc., Class A(a) 5,040 88 VeriSign,Inc.(a) 19,353 86,644 See notes to the schedule of portfolio investments. - 31 - Schedule of Portfolio Investments Mid Cap Diverse Leadership Fund May 31, 2021 (Unaudited) Concluded Shares Security Description Value Common Stocks, continued Leisure Products (0.4%) 56 Hasbro, Inc. $ 5,374 Life Sciences Tools & Services (2.5%) 21 Agilent Technologies, Inc. 2,901 21 Charles River Laboratories International, Inc.(a) 7,098 7 Mettler-Toledo International, Inc.(a) 9,106 36 Waters Corp.(a) 11,601 30,706 Machinery (3.5%) 242 Allison Transmission Holdings, Inc. 10,239 95 Graco, Inc. 7,194 23 IDEX Corp. 5,121 138 The Timken Co. 12,206 78 The Toro Co. 8,665 43,425 Media (0.1%) 1 Cable One, Inc. 1,816 Mortgage Real Estate Investment Trusts (2.1%) 1,430 AGNC Investment Corp. 26,512 Multiline Retail (0.1%) 42 Nordstrom, Inc.(a) 1,409 Multi-Utilities (1.4%) 97 MDU Resources Group, Inc. 3,265 108 Public Service Enterprise Group, Inc. 6,709 74 WEC Energy Group, Inc. 6,949 16,923 Oil, Gas & Consumable Fuels (1.0%) 555 EQT Corp.(a) 11,588 27 ONEOK, Inc. 1,424 13,012 Personal Products (0.1%) 124 Coty, Inc.(a) 1,105 Professional Services (0.7%) 24 Manpower Group, Inc. 2,904 64 Robert Half International, Inc. 5,682 Road & Rail (1.7%) 8,586 79 Old Dominion Freight Line, Inc. 20,971 Semiconductors & Semiconductor Equipment (4.1%) 37 KLA-Tencor Corp. 11,725 317 ON Semiconductor Corp.(a) 12,692 Shares Security Description Value Common Stocks, continued Semiconductors & Semiconductor Equipment, continued: 40 Qorvo, Inc.(a) $ 7,309 59 Skyworks Solutions, Inc. 10,030 74 Xilinx, Inc. 9,398 51,154 Software (5.2%) 53 Aspen Technology, Inc.(a) 7,233 4 Cadence Design Systems, Inc.(a) 508 70 Citrix Systems, Inc. 8,047 21 DocuSign, Inc.(a) 4,234 57 Fortinet, Inc.(a) 12,457 58 Manhattan Associates, Inc.(a) 7,887 247 New Relic, Inc.(a) 15,482 45 Zscaler, Inc.(a) 8,739 64,587 Specialty Retail (3.8%) 118 AutoNation, Inc.(a) 12,051 7 AutoZone, Inc.(a) 9,846 222 Foot Locker, Inc. 14,051 22 O'Reilly Automotive, Inc.(a) 11,773 47,721 Technology Hardware, Storage & Peripherals (0.7%) 151 HP, Inc. 4,414 63 Western Digital Corp.(a) 4,739 9,153 Textiles, Apparel & Luxury Goods (1.3%) 597 Hanesbrands, Inc. 11,665 13 Lululemon Athletica, Inc.(a) 4,201 15,866 Trading Companies & Distributors (1.0%) 162 Air Lease Corp. 7,624 55 MSC Industrial Direct Co., Inc. 5,192 12,816 Water Utilities (0.4%) 30 American Water Works Co., Inc. 4,651 Total Common Stocks (Cost $815,283) 1,141,444 Investment in Affiliates (6.2%) 77,264 Cavanal Hill Government Securities Money Market Fund, Select Shares, 0.01%(b) 77,264 Total Investment in Affiliates (Cost $77,264) 77,264 Total Investments (Cost $892,547) - 97.8% 1,218,708 Other assets in excess of liabilities — 2.2% 27,389 Net Assets - 100.0% $ 1,246,097 (a) Non-income producing security. (b) Money market investment. The rate presented on the Schedule of Portfolio Investments is the rate in effect at May 31, 2021. See notes to the schedule of portfolio investments. - 32 - Schedule of Portfolio Investments Opportunistic Fund May 31, 2021 (Unaudited) Shares or Principal Amount Security Description Value Common Stocks (77.9%) Aerospace & Defense (3.9%) 23,273 Parsons Corp.(a) $ 921,843 8,882 The Boeing Co.(a) 2,194,032 3,115,875 Airlines (1.5%) 20,485 United Airlines Holdings, Inc.(a) 1,195,300 Automobiles (1.7%) 93,818 Ford Motor Co.(a) 1,363,176 Banks (4.9%) 88,765 Barclays PLC ADR 939,134 10,243 JPMorgan Chase & Co. 1,682,310 20,490 Truist Financial Corp. 1,265,872 3,887,316 Beverages (2.0%) 27,981 The Coca-Cola Co. 1,547,069 Biotechnology (3.9%) 13,267 AbbVie, Inc. 1,501,825 14,629 Exact Sciences Corp.(a) 1,616,943 3,118,768 Capital Markets (1.2%) 61,450 Deutsche Bank AG(a) 927,280 Commercial Services & Supplies (1.6%) 15,725 Stericycle, Inc.(a) 1,235,356 Communications Equipment (1.6%) 6,155 Motorola Solutions, Inc. 1,263,683 Construction & Engineering (1.5%) 8,533 Jacobs Engineering Group, Inc. 1,212,369 Diversified Telecommunication Services (1.3%) 34,145 AT&T, Inc. 1,004,887 Electronic Equipment, Instruments & Components (2.1%) 38,640 Corning, Inc. 1,685,863 Energy Equipment & Services (1.1%) 28,685 Schlumberger NV 898,701 Food & Staples Retailing (1.7%) 3,497 Costco Wholesale Corp. 1,322,810 Health Care Equipment & Supplies (1.5%) 30,091 Cutera, Inc.(a) 1,154,893 Health Care Providers & Services (1.5%) 8,880 Quest Diagnostics, Inc. 1,169,230 Hotels, Restaurants & Leisure (5.4%) 10,857 Airbnb, Inc., Class A(a) 1,524,323 51,152 Norwegian Cruise Line Holdings, Ltd.(a) 1,631,749 24,037 Six Flags Entertainment Corp.(a) 1,092,001 4,248,073 Industrial Conglomerates (1.6%) 6,150 3M Co 1,248,696 Interactive Media & Services (1.6%) 3,929 Facebook, Inc., Class A(a) 1,291,580 Internet & Direct Marketing Retail (4.7%) 1,152 Amazon.com, Inc.(a) 3,712,977 IT Services (2.9%) 3,999 Accenture PLC, Class A. 1,128,358 8,195 International Business Machines Corp. 1,177,949 2,306,307 Metals & Mining (2.2%) 19,807 Rio Tinto PLC ADR 1,731,726 Oil, Gas & Consumable Fuels (3.9%) 49,299 BP PL CADR 1,293,113 27,310 HollyFrontier Corp. 886,755 14,345 Marathon Petroleum Corp.. 886,521 3,066,389 Shares or Principal Amount Security Description Value Common Stocks, continued Pharmaceuticals (1.1%) 252,773 MediWound, Ltd.(a) $ 859,428 Road & Rail (3.5%) 29,604 Uber Technologies, Inc.(a) 1,504,771 5,663 Union Pacific Corp 1,272,646 2,777,417 Semiconductors & Semiconductor Equipment (4.1%) 30,725 Infineon Technologies AG ADR 1,244,055 9,549 NXP Semiconductors NV 2,018,850 3,262,905 Software (4.5%) 19,120 Anaplan, Inc.(a) 984,871 50,327 Dropbox, Inc., Class A(a) 1,376,443 4,435 RingCentral, Inc., Class A(a) 1,164,055 3,525,369 Technology Hardware, Storage & Peripherals (6.5%) 21,854 Apple, Inc. 2,723,227 15,725 NetApp, Inc. 1,216,643 61,475 Pure Storage, Inc.(a) 1,171,099 5,110,969 Textiles, Apparel & Luxury Goods (1.4%) 13,937 VF Corp. 1,111,058 Trading Companies & Distributors (1.5%) 12,295 MSC Industrial Direct Co., Inc. 1,160,648 Total Common Stocks (Cost $56,825,043) 61,516,118 Corporate Bonds (17.1%) Airlines (2.8%) $ 1,851,000 Delta Air Lines, Inc., 7.38%, 1/15/26, Callable 12/15/25 @ 100* 2,180,161 Hotels, Restaurants & Leisure (4.6%) 1,161,000 Marriott International, Inc., 3.13%, 6/15/26, Callable 3/15/26 @ 100 1,233,867 2,079,000 Royal Caribbean Cruises, Ltd., 7.50%, 10/15/27 . 2,442,825 3,676,692 Machinery (2.3%) 1,554,000 Wabtec Corp., 4.95%, 9/15/28, Callable 6/15/28 @ 100* 1,791,468 Oil, Gas & Consumable Fuels (7.4%) 1,280,000 Hess Corp., 4.30%, 4/1/27, Callable 1/1/27 @ 100* 1,425,415 2,041,000 HollyFrontier Corp., 5.88%, 4/1/26, Callable 1/1/26 @ 100* 2,356,572 2,057,000 Matador Resources Co., 5.88%, 9/15/26, Callable 9/15/21 @ 104* 2,064,714 5,846,701 Total Corporate Bonds (Cost $12,793,330) 13,495,022 Investment Companies (2.3%) 34,811 iShares MSCI Eurozone ETF, 1.86% 1,765,614 Total Investment Companies (Cost $1,702,093) 1,765,614 Investment in Affiliates (2.5%) 1,996,859 Cavanal Hill Government Securities Money Market Fund, Select Shares, 0.01%(b) 1,996,859 Total Investment in Affiliates (Cost $1,996,859) 1,996,859 Total Investments (Cost $73,317,325) - 99.8% 78,773,613 Other assets in excess of liabilities — 0.2% 191,296 Net Assets - 100.0% $ 78,964,909 See notes to the schedule of portfolio investments. - 33 - Schedule of Portfolio Investments Opportunistic Fund May 31, 2021 (Unaudited) Concluded (a) Non-income producing security. (b) Money market investment. The rate presented on the Schedule of Portfolio Investments is the rate in effect at May 31, 2021. * Represents next call date. Additional subsequent call dates and amounts may apply to this security. ADR American Depositary Receipt ETF Exchange Traded Fund See notes to the schedule of portfolio investments. - 34 - Schedule of Portfolio Investments World Energy Fund May 31, 2021 (Unaudited) Shares or Principal Amount Security Description Value Common Stocks (93.0%) Auto Components (1.7%) 3,300 Aptiv PLC(a) $ 496,386 Chemicals (3.5%) 2,000 Albemarle Corp. 334,160 45,000 Umicore SA ADR 675,450 1,009,610 Electric Utilities (0.4%) 42 ALLETE, Inc. 2,893 22 American Electric Power Co., Inc. 1,892 284 Duke Energy Corp. 28,463 31 Evergy, Inc. 1,922 62 Fortis, Inc. 2,830 792 NextEra Energy, Inc. 57,990 30 Otter Tail Corp. 1,439 25 Pinnacle West Capital Corp. 2,115 399 The Southern Co. 25,504 125,048 Electrical Equipment (6.6%) 25,000 Bloom Energy Corp., Class A(a) 604,250 12,000 Sunrun, Inc.(a) 536,640 10,000 TPI Composites, Inc.(a) 483,000 23,000 Vestas Wind Systems A/S ADR 299,690 1,923,580 Energy Equipment & Services (11.8%) 44,012 Baker Hughes Co. 1,073,893 38,948 Halliburton Co. 874,382 343 Helmerich & Payne, Inc. 9,690 41,209 Schlumberger NV 1,291,078 9,485 Tenaris SA ADR 217,301 3,466,344 Gas Utilities (0.0%^) 45 Atmos Energy Corp. 4,463 20 Chesapeake Utilities Corp. 2,291 49 National Fuel & Gas Co. 2,543 30 Northwest Natural Holding Co. 1,586 27 Southwest Gas Holdings, Inc. 1,782 12,665 Independent Power and Renewable Electricity Producers (0.1%) 169 AES Corp. 4,295 152 Atlantica Yield PLC 5,525 107 NRG Energy, Inc. 3,440 63 Ormat Technologies, Inc. 4,350 70 Sunnova Energy International, Inc.(a) 2,044 124 Vistra Corp. 2,005 21,659 Metals & Mining (2.7%) 8,500 Freeport-McMoRan, Inc. 363,120 5,000 Rio Tinto PLC ADR 437,150 800,270 Multi-Utilities (0.6%) 19 Consolidated Edison, Inc. 1,467 729 Dominion Resources, Inc. 55,506 32 DTE Energy Co. 4,416 259 MDU Resources Group, Inc. 8,718 869 National Grid PLC ADR 58,110 275 Sempra Energy 37,260 27 WEC Energy Group, Inc. 2,536 168,013 Oil, Gas & Consumable Fuels (59.6%) 50,000 APA Corp. 1,040,000 49,270 BP PLC ADR 1,292,352 3,354 Chevron Corp. 348,112 Shares or Principal Amount Security Description Value Common Stocks, continued Oil, Gas & Consumable Fuels, continued: 12,500 Cimarex Energy Co. $ 846,875 16,161 Conoco Phillips 900,814 37,000 Continental Resources, Inc. 1,205,090 42,500 Devon Energy Corp. 1,128,800 11,000 Diamondback Energy, Inc. 880,770 15,446 Enbridge, Inc. 594,362 3,084 EOG Resources, Inc. 247,769 5,012 Exxon Mobil Corp. 292,550 60,000 Galp Energia SGPS SA ADR 376,800 7,800 Hess Corp. 653,796 15,000 HollyFrontier Corp. 487,050 1,636 Kinder Morgan, Inc. 30,004 90,000 Marathon Oil Corp. 1,089,900 22,680 Marathon Petroleum Corp. 1,401,624 14,049 ONEOK, Inc. 740,944 9,317 Pembina Pipeline Corp. 301,125 9,042 Phillips 66 761,517 3,500 Pioneer Natural Resources Co. 532,665 1,191 Royal Dutch Shell PLC ADR, Class A 45,985 10,375 TC Energy Corp. 529,748 14,937 TOTAL SE ADR 697,409 12,493 Valero Energy Corp. 1,004,437 17,430,498 Semiconductors & Semiconductor Equipment (4.9%) 6,000 First Solar, Inc.(a) 456,660 13,000 Infineon Technologies AG ADR 526,370 2,200 NXP Semiconductors NV 465,124 1,448,154 Water Utilities (1.1%) 237 American States Water Co. 18,811 1,142 American Water Works Co., Inc. 177,033 2,597 Essential Utilities, Inc. 124,136 24 Middlesex Water Co. 2,063 35 SJW Group 2,256 324,299 Total Common Stocks (Cost $20,755,080) 27,226,526 Corporate Bonds (5.3%) Diversified Financial Services (0.9%) $ 250,000 Total Capital International SA, 2.75%, 6/19/21 250,321 Oil, Gas & Consumable Fuels (4.4%) 250,000 Callon Petroleum Co., 6.13%, 10/1/24, Callable 7/12/21 @ 103 * 230,100 300,000 HollyFrontier Corp., 5.88%, 4/1/26, Callable 1/1/26 @ 100* 346,385 200,000 Matador Resources Co., 5.88%, 9/15/26, Callable 9/15/21 @ 104 * 200,750 200,000 Suncor Energy, Inc., 3.60%, 12/1/24, Callable 9/1/24 @ 100* 217,454 300,000 Valero Energy Corp., 2.15%, 9/15/27, Callable 7/15/27 @ 100* 301,679 1,296,368 Total Corporate Bonds (Cost $1,538,398) 1,546,689 Investment in Affiliates (1.3%) 376,253 Cavanal Hill Government Securities Money Market Fund,Select Shares,0.01%(b) 376,253 Total Investment in Affiliates (Cost $376,253) 376,253 See notes to the schedule of portfolio investments. - 35 - Schedule of Portfolio Investments World Energy Fund May 31, 2021 (Unaudited) Concluded Shares or Principal Amount Security Description Value Investment in Affiliates, continued Total Investments (Cost $22,669,731) - 99.6% $ 29,149,468‌ Other assets in excess of liabilities — 0.4% 111,809‌ Net Assets - 100.0% $ 29,261,277‌ The Advisor has determined that 48.1% of the Fund’s net assets comprise securities of issuers which are either foreign domiciled or derive more than 50% of its assets, revenue or income outside of the United States. (a) Non-income producing security. (b) Money market investment. The rate presented on the Schedule of Portfolio Investments is the rate in effect at May 31, 2021. * Represents next call date. Additional subsequent call dates and amounts may apply to this security. ^ Represents less than 0.05%. ADR American Depositary Receipt See notes to the schedule of portfolio investments. - 36 - Schedule of Portfolio Investments Hedged Income Fund May 31, 2021 (Unaudited) Shares Security Description Value Common Stocks (96.5%) Beverages (6.5%) 3,400 PepsiCo, Inc. $ 502,996 10,800 The Coca-Cola Co. 597,132 1,100,128 Biotechnology (3.2%) 4,800 AbbVie, Inc. 543,360 Capital Markets (4.1%) 800 BlackRock, Inc. 701,632 Chemicals (4.3%) 10,600 Dow, Inc. 725,252 Communications Equipment (3.2%) 10,400 Cisco Systems, Inc. 550,160 Containers & Packaging (3.7%) 4,300 Packaging Corp. of America 639,195 Diversified Telecommunication Services (8.0%) 24,300 AT&T, Inc. 715,149 11,600 Verizon Communications, Inc. 655,284 1,370,433 Electric Utilities (10.1%) 5,500 American Electric Power Co., Inc. 473,000 7,900 Duke Energy Corp. 791,738 5,400 Pinnacle West Capital Corp. 456,732 1,721,470 Electrical Equipment (2.6%) 4,600 Emerson Electric Co. 440,174 Electronic Equipment, Instruments & Components (2.7%) 10,400 Corning, Inc. 453,752 Equity Real Estate Investment Trusts (7.1%) 3,300 Crown Castle International Corp. 625,350 16,500 STAG Industrial, Inc. 589,215 1,214,565 Household Durables (3.1%) 3,700 Garmin, Ltd. 526,288 Shares Security Description Value Common Stocks, continued Industrial Conglomerates (4.3%) 3,600 3M Co. $ 730,944‌ Multiline Retail (3.7%) 2,800‌ Target Corp. 635,376‌ Oil, Gas & Consumable Fuels (9.0%) 6,600 ONEOK, Inc. 348,084‌ 8,200‌ Phillips 66 690,604‌ 10,700‌ TOTAL SE ADR 499,583‌ 1,538,271‌ Pharmaceuticals (4.3%) 8,000‌ AstraZeneca PLC ADR 454,160‌ 3,600‌ Merck & Co., Inc. 273,204‌ 727,364‌ Semiconductors & Semiconductor Equipment (8.0%) 1,900 Broadcom, Inc. 897,427‌ 2,500‌ Texas Instruments, Inc. 474,550‌ 1,371,977‌ Specialty Retail (2.8%) 1,500 The Home Depot, Inc. 478,365‌ Textiles, Apparel & Luxury Goods (2.0%) 4,200 ‌ VF Corp. 334,824‌ Trading Companies & Distributors (3.8%) 6,900 ‌ MSC Industrial Direct Co., Inc. 651,360‌ Total Common Stocks (Cost $15,234,472) 16,454,890‌ Purchased Option (1.0%)^ 380 SPDR S&P 500 ETF Trust, 0.00% 170,240‌ Total Purchased Option (Cost $238,173) 170,240‌ Investment in Affiliates (2.3%) 400,289‌ Cavanal Hill Government Securities Money Market Fund, Select Shares, 0.01%(a) 400,289‌ Total Investment in Affiliates (Cost $400,289) 400,289‌ Total Investments (Cost $15,872,934) - 99.8% 17,025,419‌ Other assets in excess of liabilities — 0.2% 41,380‌ Net Assets - 100.0% $ 17,066,799‌ (a) Money market investment. The rate presented on the Schedule of Portfolio Investments is the rate in effect at May 31, 2021. ADR American Depositary Receipt ETF Exchange Traded Fund ^ See Options table below for more details. At May 31, 2021, the Fund's exchange traded options purchased were as follows: Put/ Expiration Notional Description Call Strike Price Date Contracts Amount(a) Fair Value SPDR S&P 500 ETF Trust Put 365.00 USD 9/17/21 380 $ 138,700 $ 170,240 Total (Cost $238,173) $ 170,240 At May 31, 2021, the Fund's exchange traded options written were as follows: Put/ Expiration Notional Description Call Strike Price Date Contracts Amount(a) Fair Value 3M Co. Call 210.00 USD 6/18/21 34 $ 7,140‌ $ (2,414 ) Abbvie, Inc. Call 120.00 USD 6/25/21 48 5,760‌ (2,400 ) American Electric Power Co., Inc. Call 90.00 USD 6/18/21 55 4,950‌ (825 ) See notes to the schedule of portfolio investments. - 37 - Schedule of Portfolio Investments Hedged Income Fund May 31, 2021 (Unaudited) Concluded AstraZeneca PLC-SPONS ADR Call 57.50 USD 6/18/21 80 $ 4,600 $ (5,680 ) AT&T, Inc. Call 32.00 USD 6/18/21 225 7,200‌ (900 ) BlackRock, Inc. Call 870.00 USD 6/18/21 1 870‌ (1,800 ) BlackRock, Inc. Call 890.00 USD 6/18/21 6 5,340‌ (5,280 ) Broadcom, Inc. Call 490.00 USD 6/18/21 18 8,820‌ (11,142 ) Cisco Systems, Inc. Call 54.00 USD 6/25/21 104 5,616‌ (6,240 ) Coca-Cola Co. (The) Call 57.50 USD 6/18/21 102 5,865 (918 ) Corning, Inc. Call 48.00 USD 6/18/21 104 4,992‌ (832 ) Crown Castle International Corp. Call 190.00 USD 6/18/21 31 5,890‌ (8,680 ) Dow, Inc. Call 70.00 USD 6/18/21 100 7,000‌ (9,200 ) Duke Energy Corp. Call 100.00 USD 6/18/21 77 7,700‌ (12,705 ) Emerson Electric Co. Call 100.00 USD 6/18/21 46 4,600‌ (1,380 ) Garmin, Ltd. Call 150.00 USD 6/18/21 37 5,550‌ (925 ) Home Depot, Inc. (The) Call 340.00 USD 6/18/21 11 3,740‌ (495 ) Home Depot, Inc. (The) Call 355.00 USD 6/18/21 4 1,420‌ (52 ) Merck & Co., Inc. Call 82.50 USD 6/18/21 35 2,888 (175 ) MSC Industrial Direct Co. Call 100.00 USD 6/18/21 65 6,500‌ (1,463 ) ONEOK, Inc. Call 58.00 USD 6/18/21 66 3,828‌ (990 ) Packaging Corp. of America Call 155.00 USD 6/18/21 43 6,665‌ (3,010 ) PepsiCo, Inc. Call 150.00 USD 6/18/21 6 900‌ (474 ) PepsiCo, Inc. Call 147.00 USD 6/25/21 28 4,116‌ (6,664 ) Phillips 66 Call 92.50 USD 6/18/21 82 7,585‌ (1,845 ) Pinnacle West Capital Call 90.00 USD 6/18/21 54 4,860‌ (810 ) Target Corp. Call 230.00 USD 6/18/21 5 1,150‌ (1,335 ) Target Corp. Call 215.00 USD 6/25/21 23 4,945‌ (31,050 ) Texas Instruments, Inc. Call 195.00 USD 6/18/21 24 4,680‌ (4,584 ) Total SE-SPON ADR Call 50.00 USD 6/18/21 105 5,250‌ (1,260 ) Verizon Communications, Inc. Call 58.00 USD 6/25/21 97 5,626‌ (3,492 ) Verizon Communications, Inc. Call 59.00 USD 6/25/21 19 1,121‌ (380 ) VF Corp. Call 90.00 USD 6/18/21 28 2,520‌ (560 ) VF Corp. Call 92.50 USD 6/18/21 14 1,295‌ (350 ) Total (Premiums $(229,425)) $ (130,310 ) (a) Notional amount is expressed as the number of contracts multiplied by the strike price of the underlying asset. See notes to the schedule of portfolio investments. - 38 - Notes to Schedules of Portfolio Investments May 31, 2021 (Unaudited) 1. Restricted Securities: A restricted security is a security that has been purchased through a private offering and cannot be resold to the general public without prior registration under the Securities Act of 1933 (the “1933 Act”) or pursuant to the resale limitations provided by Rule 144 under the 1933 Act or an exemption from the registration requirements of the 1933 Act. Whether a restricted security is illiquid is determined pursuant to guidelines established by the Board. Not all restricted securities are considered illiquid. The illiquid, restricted securities held as of May 31, 2021 are identified below: Acquisition Principal Fair Security Acquisition Date Cost Amount Value Limited Duration Fund: Cazenovia Creek Funding II LLC, Series 2018-1A, A, 3.56%, 7/15/30 8/22/18 $ 302,279 $ 302,309 $ 303,748‌ Sun Trust Student Loan Trust, Series 2006-1A, B, 0.45%, 10/28/37 5/26/17 and 4/11/18 758,706 826,717 759,541 Acquisition Principal Fair Security Acquisition Date Cost Amount Value Strategic Enhanced Yield Fund: Amur Equipment Finance Receivables LLC, Series 2021-1A, E, 4.13%, 3/20/28 4/14/21 $ 599,953 $ 600,000 $ 599,459‌ Brean Asset Backed Securities Trust, Series 2021-RM1, M1, 1.60%, 10/25/63 3/25/21 315,486 345,000 315,486 2. Affiliated Transactions: A summary of each Fund’s investment in an affiliated money market fund (Government Securities Money Market Fund, Select Shares) for the period ending May 31, 2021 is noted below: Net Net Change Realized in Unrealized Fair Value Gains/ Appreciation/ Fair Value Shares as of Dividend Fund 8/31/20 Purchases Sales (Losses) Depreciation 5/31/21 5/31/21 Income Limited Duration Fund $ 6,439,763 $ 61,367,670 $ (64,603,190 ) $ — $ — $ 3,204,243 3,204,243 $ 242 Moderate Duration Fund 3,443,883 14,111,353 (16,436,792 ) — — 1,118,444 1,118,444 69 Bond Fund 2,590,008 36,761,514 (34,091,064 ) — — 5,260,458 5,260,458 231 Strategic Enhanced Yield Fund 2,048,668 22,661,615 (21,962,971 ) — — 2,747,312 2,747,312 112 Ultra Short Tax-Free Income Fund 1,847,685 14,648,589 (16,439,210 ) — — 57,064 57,064 32 Active Core Fund 1,213,800 12,015,181 (11,846,003 ) — — 1,382,978 1,382,978 92 Mid Cap Diverse Leadership Fund 37,581 436,035 (396,352 ) — — 77,264 77,264 2 Opportunistic Fund 2,970,000 67,852,588 (68,825,729 ) — — 1,996,859 1,996,859 192 World Energy Fund 330,331 13,021,844 (12,975,922 ) — — 376,253 376,253 37 Hedged Income Fund — 13,634,199 (13,233,910 ) — — 400,289 400,289 20 $ 20,921,719 $ 256,510,588 $ (260,811,143 ) $ — $ — $ 16,621,164 16,621,164 $ 1,029 A summary of the Opportunistic Fund’s investment in an affiliated money market fund for the period ending May 31, 2021 is noted below: Net Net Change Realized in Unrealized Fair Value Gains/ Appreciation/ Fair Value Shares as of Dividend Fund 8/31/20 Purchases Sales (Losses) Depreciation 5/31/21 5/31/21 Income U.S. Treasury Fund, Select Shares $ 47,026 $ 7,503,648 $ (7,550,674 ) — $ — $ — — $ — $ 47,026 $ 7,503,648 $ (7,550,674 ) $ — $ — $ — — $ — A summary of the Active Core Fund’s investment in an affiliated fund for the period ending May 31, 2021 is noted below: Net Net Change Realized in Unrealized Fair Value Gains/ Appreciation/ Fair Value Shares as of Dividend Fund 8/31/20 Purchases Sales (Losses) Depreciation 5/31/21 5/31/21 Income World Energy Fund, Institutional Shares $ 322,919 $ — $ — $ — $ 172,734 $ 495,653 $ 52,409 $ 5,327 $ 322,919 $ — $ — $ — $ 172,734 $ 495,653 $ 52,409 $ 5,327 - 39 -