Quantitative Master Series NPORT-P Master Small Cap Index Series (Mar 2023 report)

Schedule of Investments (unaudited) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Common Stocks
Advertising Agencies(a) — 0.1%
Advantage Solutions, Inc.(b)		129,718	$	204,954
Audacy, Inc.(b)		245,324		33,045
Boston Omaha Corp., Class A		37,689		892,099
Cardlytics, Inc.		52,309		177,589
Clear Channel Outdoor Holdings, Inc.		629,861		755,833
QuinStreet, Inc.(b)		86,424		1,371,549
Thryv Holdings, Inc.		43,693		1,007,561
Viad Corp.		33,973		707,997
				5,150,627
Aerospace — 0.8%
AAR Corp.(a)		56,612		3,088,185
Aerojet Rocketdyne Holdings, Inc.(a)		136,334		7,657,881
AeroVironment, Inc.(a)		42,143		3,862,827
AerSale Corp.(a)		42,185		726,426
Archer Aviation, Inc., Class A(a)(b)		247,209		707,018
Astronics Corp.(a)		41,898		559,757
Cadre Holdings, Inc.		32,299		695,720
Ducommun, Inc.(a)		18,955		1,037,028
Kaman Corp.		47,868		1,094,262
Kratos Defense & Security Solutions, Inc.(a)		210,022		2,831,096
Macerich Co.		358,843		3,803,736
Moog, Inc., Class A		48,716		4,908,137
Triumph Group, Inc.(a)		109,718		1,271,632
				32,243,705
Aerospace & Defense(a) — 0.1%
Astra Space, Inc.(b)		222,300		94,478
Momentus, Inc.		84,216		49,266
Redwire Corp.(b)		29,894		90,579
Rocket Lab USA, Inc.(b)		369,191		1,491,532
Terran Orbital Corp.(b)		64,380		118,459
Virgin Galactic Holdings, Inc.(b)		414,823		1,680,033
				3,524,347
Agriculture, Fishing & Ranching — 0.2%
Alico, Inc.		11,837		286,455
Andersons, Inc.		54,745		2,262,064
Calavo Growers, Inc.		29,568		850,671
Cal-Maine Foods, Inc.		64,853		3,948,899
Fresh Del Monte Produce, Inc.		52,242		1,573,007
Fresh Market, Inc.(c)		14,020		—
GrowGeneration Corp.(a)(b)		102,530		350,653
				9,271,749
Air Transport — 0.3%
Air Transport Services Group, Inc.(a)		99,025		2,062,691
Allegiant Travel Co.(a)		26,913		2,475,458
Frontier Group Holdings, Inc.(a)		64,162		631,354
Hawaiian Holdings, Inc.(a)		87,393		800,520
SkyWest, Inc.(a)		85,356		1,892,342
Spirit Airlines, Inc.		186,536		3,202,823
Sun Country Airlines Holdings, Inc.(a)		56,532		1,158,906
				12,224,094
Airlines(a) — 0.0%
Blade Air Mobility, Inc.		91,215		308,307
Diversey Holdings Ltd.(b)		133,932		1,083,510
Wheels Up Experience, Inc.(b)		245,907		155,610
WM Technology, Inc.		110,879		94,158
				1,641,585

Security	Shares		Value
Alternative Energy — 0.4%
Aemetis, Inc.(a)(b)		48,385	$	112,253
Alto Ingredients, Inc.(a)		117,185		175,777
Ameresco, Inc., Class A(a)(b)		54,314		2,673,335
Battalion Oil Corp.(a)(b)		4,417		29,020
Centrus Energy Corp., Class A(a)(b)		15,863		510,789
Green Brick Partners, Inc.(a)		46,494		1,630,080
Green Plains, Inc.(a)(b)		51,340		1,591,027
Permian Resources Corp.		402,086		4,221,903
REX American Resources Corp.(a)		26,807		766,412
Sitio Royalties Corp., Class A		121,540		2,746,804
Sunnova Energy International, Inc.(a)(b)		169,768		2,651,776
				17,109,176
Aluminum — 0.2%
Arconic Corp.(a)(b)		170,788		4,479,769
Century Aluminum Co.(a)		89,305		893,050
Kaiser Aluminum Corp.		27,050		2,018,742
				7,391,561
Asset Management & Custodian — 0.9%
Artisan Partners Asset Management, Inc., Class A		102,749		3,285,913
AssetMark Financial Holdings, Inc.(a)(b)		36,881		1,159,907
B. Riley Financial, Inc.		35,565		1,009,690
Brightsphere Investment Group, Inc.		55,133		1,300,036
Cohen & Steers, Inc.		43,523		2,783,731
Diamond Hill Investment Group, Inc.		4,899		806,277
Federated Hermes, Inc.		145,762		5,850,887
Focus Financial Partners, Inc., Class A(a)		99,617		5,167,134
GCM Grosvenor, Inc., Class A		71,690		559,899
Hamilton Lane, Inc., Class A		61,269		4,532,681
Open Lending Corp., Class A(a)		180,755		1,272,515
Oppenheimer Holdings, Inc., Class A		13,574		531,422
PJT Partners, Inc., Class A		40,421		2,917,992
Sculptor Capital Management, Inc.		40,728		350,668
Silvercrest Asset Management Group, Inc., Class A		15,320		278,518
StepStone Group, Inc., Class A		93,660		2,273,128
Virtus Investment Partners, Inc.		11,061		2,105,904
WisdomTree, Inc.		213,451		1,250,823
				37,437,125
Auto Components(a)(b) — 0.1%
Holley, Inc.		82,686		226,560
Luminar Technologies, Inc.		429,391		2,786,747
Solid Power, Inc.		226,686		682,325
				3,695,632
Auto Parts — 1.1%
Adient PLC(a)(b)		162,014		6,636,093
American Axle & Manufacturing Holdings, Inc.(a)		192,625		1,504,401
Canoo, Inc.(a)(b)		505,261		329,733
CarParts.com, Inc.(a)(b)		88,102		470,465
Dana, Inc.		220,458		3,317,893
Dorman Products, Inc.(a)		44,961		3,878,336
Fisker, Inc.(a)(b)		303,219		1,861,765
Fox Factory Holding Corp.(a)		72,375		8,784,154
Gentherm, Inc.(a)		56,531		3,415,603
Lordstown Motors Corp., Class A(a)(b)		328,857		218,065
Mullen Automotive, Inc.(a)(b)		1,913,481		251,240
Standard Motor Products, Inc.		34,539		1,274,834
Stoneridge, Inc.(a)		44,902		839,667
Visteon Corp.(a)		47,461		7,443,309

SERIES  SCHEDULE  OF  INVESTMENTS 1

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Auto Parts (continued)
Workhorse Group, Inc.(a)(b)		268,944	$	357,696
XPEL, Inc.(a)		36,741		2,496,551
				43,079,805
Auto Services — 0.1%
Goodyear Tire & Rubber Co.(a)		479,551		5,284,652
Automobiles(a) — 0.0%
Cenntro Electric Group Ltd.		284,366		131,320
Faraday Future Intelligent Electric, Inc.(b)		903,265		319,846
				451,166
Back Office Support, HR & Consulting — 1.7%
ASGN, Inc.(a)(b)		81,651		6,750,088
Atlas Technical Consultants, Inc.(a)		31,938		389,324
Barrett Business Services, Inc.		11,758		1,042,229
CBIZ, Inc.(a)		79,401		3,929,556
Conduent, Inc.(a)		289,923		994,436
CRA International, Inc.		11,850		1,277,667
DHI Group, Inc.(a)(b)		66,059		256,309
ExlService Holdings, Inc.(a)		55,309		8,950,655
Forrester Research, Inc.(a)(b)		19,302		624,420
Hackett Group, Inc.		39,450		729,036
Heidrick & Struggles International, Inc.		33,542		1,018,335
Huron Consulting Group, Inc.(a)		33,665		2,705,656
ICF International, Inc.(b)		31,416		3,446,335
Insperity, Inc.		61,194		7,438,131
Kelly Services, Inc., Class A		56,472		936,870
Kforce, Inc.		33,973		2,148,453
Korn Ferry		89,582		4,634,973
Liquidity Services, Inc.(a)		41,804		550,559
Maximus, Inc.		101,986		8,026,298
NV5 Global, Inc.(a)(b)		23,119		2,403,682
PFSweb, Inc.		25,521		108,209
Resources Connection, Inc.		54,740		933,864
Target Hospitality Corp.(a)(b)		50,162		659,129
TriNet Group, Inc.(a)		63,978		5,157,267
TrueBlue, Inc.(a)		55,484		987,615
TTEC Holdings, Inc.		32,428		1,207,294
				67,306,390
Banks — 0.0%
John Marshall Bancorp, Inc.		19,472		420,595
USCB Financial Holdings, Inc.(a)		16,653		164,698
				585,293
Banks: Diversified — 7.1%
1st Source Corp.		27,629		1,192,191
ACNB Corp.		13,052		424,843
Ambac Financial Group, Inc.(a)		75,816		1,173,632
Amerant Bancorp, Inc.		45,200		983,552
American National Bankshares, Inc.		17,485		554,275
Ameris Bancorp		112,931		4,131,016
Arrow Financial Corp.		24,027		598,513
Associated Banc-Corp.		255,826		4,599,751
Atlantic Union Bankshares Corp.		119,469		4,187,388
BancFirst Corp.		33,548		2,787,839
Banco Latinoamericano de Comercio Exterior SA, Class E		46,519		808,500
Bancorp, Inc.(a)		79,613		2,217,222
Bank First Corp.		13,066		961,396
Bank of Marin Bancorp		27,474		601,406
Bank of NT Butterfield & Son Ltd.		85,036		2,295,972
Bankwell Financial Group, Inc.		8,704		216,381

Security	Shares		Value
Banks: Diversified (continued)
Banner Corp.		52,372	$	2,847,466
Bar Harbor Bankshares		23,625		624,881
BayCom Corp.		19,853		339,089
BCB Bancorp, Inc.		25,133		329,996
Blue Ridge Bankshares, Inc.		27,394		279,419
Bridgewater Bancshares, Inc.(a)(b)		35,658		386,533
Business First Bancshares, Inc.		40,878		700,240
Byline Bancorp, Inc.		42,606		921,142
Cadence Bank		238,220		4,945,447
Cambridge Bancorp		11,828		766,573
Camden National Corp.		24,503		886,764
Capital Bancorp, Inc.		13,728		228,434
Capital City Bank Group, Inc.		22,987		673,749
Capitol Federal Financial, Inc.		206,654		1,390,781
Capstar Financial Holdings, Inc.		34,310		519,797
Carter Bankshares, Inc.(a)		41,122		575,708
Cathay General Bancorp		119,218		4,115,405
Central Pacific Financial Corp.		36,134		646,799
Citizens & Northern Corp.		25,956		554,939
City Holding Co.		22,134		2,011,538
Civista Bancshares, Inc.		24,583		414,961
CNB Financial Corp.		33,660		646,272
Coastal Financial Corp.(a)(b)		17,974		647,244
Colony Bankcorp, Inc.		25,286		257,917
Columbia Financial, Inc.(a)(b)		58,055		1,061,245
Community Bank System, Inc.		80,268		4,213,267
Community Trust Bancorp, Inc.		26,906		1,021,083
ConnectOne Bancorp, Inc.		63,254		1,118,331
CrossFirst Bankshares, Inc.(a)(b)		75,797		794,353
Customers Bancorp, Inc.(a)		49,120		909,702
CVB Financial Corp.		207,979		3,469,090
Eagle Bancorp, Inc.		46,781		1,565,760
Eastern Bankshares, Inc.		263,878		3,330,140
Enterprise Bancorp, Inc.		16,303		512,892
Enterprise Financial Services Corp.		60,444		2,695,198
Equity Bancshares, Inc., Class A		25,565		623,019
Esquire Financial Holdings, Inc.		11,728		458,565
Farmers & Merchants Bancorp, Inc.		20,429		496,833
Farmers National Banc Corp.		60,301		762,205
FB Financial Corp.		61,414		1,908,747
Financial Institutions, Inc.		25,606		493,684
First Bancorp, Inc.		15,345		397,282
First BanCorp/Puerto Rico		279,436		3,191,159
First Bancorp/Southern Pines NC		59,175		2,101,896
First Bancshares, Inc.		41,852		1,081,037
First Bank		24,595		248,410
First Busey Corp.		88,511		1,800,314
First Business Financial Services, Inc.		13,110		399,986
First Commonwealth Financial Corp.		139,403		1,732,779
First Community Bankshares, Inc.		25,204		631,360
First Financial Bancorp		141,314		3,076,406
First Financial Bankshares, Inc.		222,005		7,081,959
First Financial Corp.		18,853		706,610
First Foundation, Inc.		87,989		655,518
First Guaranty Bancshares, Inc.		9,370		146,828
First Internet Bancorp		14,564		242,491
First Interstate BancSystem, Inc., Class A		152,906		4,565,773
First Merchants Corp.		96,932		3,193,909
First Mid Bancshares, Inc.		31,610		860,424
First of Long Island Corp.		38,776		523,476
First Western Financial, Inc.(a)		12,197		241,501
Five Star Bancorp		21,940		468,200

2

Schedule��of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Banks: Diversified (continued)
Fulton Financial Corp.		278,379	$	3,847,198
FVCBankcorp, Inc.(a)		26,676		284,099
German American Bancorp, Inc.		47,335		1,579,569
Glacier Bancorp, Inc.		190,011		7,982,362
Guaranty Bancshares, Inc.		13,008		362,533
Hancock Whitney Corp.		147,241		5,359,572
Hanmi Financial Corp.		35,695		662,856
HarborOne Bancorp, Inc.		75,960		926,712
HBT Financial, Inc.		19,172		378,072
Heartland Financial USA, Inc.		70,377		2,699,662
Heritage Commerce Corp.		99,440		828,335
Hippo Holdings, Inc.(a)(b)		30,377		493,019
Home BancShares, Inc.		321,742		6,985,019
Hope Bancorp, Inc.		162,875		1,599,433
Horizon Bancorp, Inc.		69,368		767,210
Independent Bank Corp.		100,933		4,993,788
Independent Bank Group, Inc.		61,133		2,833,515
International Bancshares Corp.		91,438		3,915,375
Lakeland Bancorp, Inc.		108,179		1,691,920
Lakeland Financial Corp.		40,685		2,548,508
Live Oak Bancshares, Inc.		56,394		1,374,322
Luther Burbank Corp.		24,183		229,255
Macatawa Bank Corp.		45,275		462,711
Mercantile Bank Corp.		26,021		795,722
Merchants Bancorp(b)		26,873		699,773
Metrocity Bankshares, Inc.		29,924		511,401
Metropolitan Bank Holding Corp.(a)		17,970		609,003
Mid Penn Bancorp, Inc.		24,430		625,652
Midland States Bancorp, Inc.		35,994		770,991
MVB Financial Corp.		18,014		371,809
National Bank Holdings Corp., Class A		46,113		1,542,941
NBT Bancorp, Inc.		64,164		2,162,968
Nicolet Bankshares, Inc.(a)(b)		20,945		1,320,582
Northeast Bank		10,845		365,043
OFG Bancorp		71,865		1,792,313
Old National Bancorp		501,182		7,227,044
Old Second Bancorp, Inc.		72,395		1,017,874
Origin Bancorp, Inc.		38,233		1,229,191
Orrstown Financial Services, Inc.		16,163		320,997
Pacific Premier Bancorp, Inc.		132,968		3,193,891
Park National Corp.		23,887		2,832,282
Parke Bancorp, Inc.		16,740		297,637
PCB Bancorp		20,704		300,001
Peapack-Gladstone Financial Corp.		29,259		866,652
Peoples Bancorp, Inc.		47,771		1,230,103
Peoples Financial Services Corp.		10,766		466,706
Pioneer Bancorp, Inc.(a)		20,117		198,354
Preferred Bank/Los Angeles CA		12,747		698,663
Primis Financial Corp.		39,363		379,066
Provident Financial Services, Inc.		110,654		2,122,344
QCR Holdings, Inc.(b)		26,930		1,182,496
RBB Bancorp		22,814		353,617
Red River Bancshares, Inc.		7,783		374,440
Renasant Corp.		83,410		2,550,678
Republic Bancorp, Inc., Class A		14,675		622,660
Republic First Bancorp, Inc.(a)(b)		86,037		117,010
Root, Inc., Class A(a)(b)		11,987		54,061
S&T Bancorp, Inc.		52,403		1,648,074
Sandy Spring Bancorp, Inc.		75,518		1,961,958
Seacoast Banking Corp. of Florida		122,856		2,911,687
ServisFirst Bancshares, Inc.		85,647		4,678,896
Shore Bancshares, Inc.		30,545		436,183

Security	Shares		Value
Banks: Diversified (continued)
Sierra Bancorp		23,543	$	405,410
Simmons First National Corp., Class A		184,109		3,220,066
SmartFinancial, Inc.		25,879		598,840
South Plains Financial, Inc.		15,746		337,122
Southern First Bancshares, Inc.(a)		13,074		401,372
Southside Bancshares, Inc.		48,411		1,607,245
SouthState Corp.		128,206		9,135,960
Stellar Bancorp, Inc.		76,911		1,892,780
Stock Yards Bancorp, Inc.		48,909		2,696,842
Summit Financial Group, Inc.		17,559		364,349
Texas Capital Bancshares, Inc.(a)		82,974		4,062,407
Third Coast Bancshares, Inc.(a)		22,224		349,139
Tompkins Financial Corp.		23,429		1,551,234
Towne Bank		116,861		3,114,346
TriCo Bancshares		52,959		2,202,565
Triumph Financial, Inc.(a)(b)		35,342		2,051,957
TrustCo Bank Corp./New York		29,053		927,953
Trustmark Corp.		95,350		2,355,145
UMB Financial Corp.		75,263		4,344,180
United Bankshares, Inc.		207,416		7,301,043
United Community Banks, Inc.		168,234		4,730,740
Unity Bancorp, Inc.		12,604		287,497
Univest Financial Corp.		48,916		1,161,266
Valley National Bancorp		735,863		6,799,374
Veritex Holdings, Inc.		73,782		1,347,259
Washington Trust Bancorp, Inc.		29,879		1,035,606
WesBanco, Inc.		97,508		2,993,496
West BanCorp, Inc.		27,302		498,808
Westamerica BanCorp		39,538		1,751,533
				285,397,745
Banks: Savings, Thrift & Mortgage Lending — 0.8%
Amalgamated Financial Corp.		30,335		536,626
Axos Financial, Inc.(a)		96,724		3,571,050
Banc of California, Inc.		83,135		1,041,682
BankUnited, Inc.		115,702		2,612,551
Berkshire Hills Bancorp, Inc.		62,941		1,577,301
Brookline Bancorp, Inc.		127,149		1,335,064
Finance of America Cos., Inc., Class A(a)		53,250		66,030
Flushing Financial Corp.		48,559		723,044
Great Southern Bancorp, Inc.		15,708		796,081
Greene County Bancorp, Inc.		10,462		237,278
Heritage Financial Corp.		53,775		1,150,785
Hingham Institution for Savings		2,516		587,335
Home Bancorp, Inc.		11,784		389,226
Home Point Capital, Inc.		7,506		14,487
HomeStreet, Inc.		25,459		458,007
Kearny Financial Corp.		101,333		822,824
Northfield Bancorp, Inc.		72,912		858,903
Northwest Bancshares, Inc.		184,801		2,223,156
OceanFirst Financial Corp.		96,991		1,792,394
Premier Financial Corp.		60,526		1,254,704
Provident Bancorp, Inc.		22,753		155,631
Southern Missouri Bancorp, Inc.		13,513		505,521
Sterling Bancorp, Inc.(a)(b)		26,451		149,713
Washington Federal, Inc.		102,537		3,088,414
Waterstone Financial, Inc.		33,007		499,396
WSFS Financial Corp.		94,352		3,548,579
				29,995,782
Beverage: Soft Drinks — 0.5%
Celsius Holdings, Inc.(a)		94,883		8,818,426
Coca-Cola Consolidated, Inc.		8,017		4,289,736
Duckhorn Portfolio, Inc.(a)(b)		72,522		1,153,100

SERIES  SCHEDULE  OF  INVESTMENTS 3

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Beverage: Soft Drinks (continued)
National Beverage Corp.(a)		40,371	$	2,128,359
Primo Water Corp.		269,654		4,139,189
Vintage Wine Estates, Inc.(a)		50,032		53,534
				20,582,344
Biotechnology — 6.5%
2seventy bio, Inc.(a)		64,221		655,054
4D Molecular Therapeutics, Inc.(a)		51,187		879,904
Aadi Bioscience, Inc.(a)(b)		22,370		161,959
Acrivon Therapeutics, Inc.(a)		13,494		171,239
Adicet Bio, Inc.(a)		49,237		283,605
ADMA Biologics, Inc.(a)		357,227		1,182,421
Aerovate Therapeutics, Inc.(a)		16,304		328,852
Affimed NV(a)(b)		217,574		162,223
Agenus, Inc.(a)		520,147		790,623
Agios Pharmaceuticals, Inc.(a)		93,360		2,144,479
Akero Therapeutics, Inc.(a)		59,575		2,279,339
Alector, Inc.(a)		106,239		657,619
Allogene Therapeutics, Inc.(a)(b)		136,583		674,720
Allovir, Inc.(a)(b)		48,407		190,724
Alpine Immune Sciences, Inc.(a)		39,072		301,636
ALX Oncology Holdings, Inc.(a)		32,739		147,980
Amicus Therapeutics, Inc.(a)		471,042		5,223,856
Amylyx Pharmaceuticals, Inc.(a)		86,148		2,527,582
AN2 Therapeutics, Inc.(a)		15,732		155,275
AnaptysBio, Inc.(a)		34,764		756,465
Anavex Life Sciences Corp.(a)(b)		118,316		1,013,968
ANI Pharmaceuticals, Inc.(a)		21,662		860,415
Apellis Pharmaceuticals, Inc.(a)(b)		160,175		10,565,143
Arbutus Biopharma Corp.(a)		193,283		585,647
Arcellx, Inc.(a)		50,516		1,556,398
Arcturus Therapeutics Holdings, Inc.(a)		39,452		945,664
Arcus Biosciences, Inc.(a)		87,966		1,604,500
Arcutis Biotherapeutics, Inc.(a)		71,160		782,760
Arvinas, Inc.(a)		83,291		2,275,510
Atara Biotherapeutics, Inc.(a)(b)		160,829		466,404
Aura Biosciences, Inc.(a)		40,478		375,636
Aurinia Pharmaceuticals, Inc.(a)		229,343		2,513,599
Avid Bioservices, Inc.(a)		104,386		1,958,281
Avidity Biosciences, Inc.(a)		111,556		1,712,385
Beam Therapeutics, Inc.(a)		108,748		3,329,864
BioCryst Pharmaceuticals, Inc.(a)(b)		317,227		2,645,673
Biohaven Ltd.(a)		108,173		1,477,643
Bioventus, Inc., Class A(a)		48,861		52,281
Bioxcel Therapeutics, Inc.(a)(b)		33,014		616,041
Bluebird Bio, Inc.(a)		177,110		563,210
Blueprint Medicines Corp.(a)		102,071		4,592,174
Bridgebio Pharma, Inc.(a)(b)		180,939		2,999,969
C4 Therapeutics, Inc.(a)		77,818		244,348
Caribou Biosciences, Inc.(a)(b)		94,284		500,648
Castle Biosciences, Inc.(a)		41,893		951,809
Catalyst Pharmaceuticals, Inc.(a)(b)		165,783		2,748,682
Celldex Therapeutics, Inc.(a)(b)		78,321		2,817,990
Celularity, Inc.(a)		108,491		67,232
Century Therapeutics, Inc.(a)		33,469		116,137
Cerevel Therapeutics Holdings, Inc.(a)(b)		97,892		2,387,586
Chinook Therapeutics, Inc.(a)		86,725		2,007,684
Codexis, Inc.(a)		105,733		437,735
Cogent Biosciences, Inc.(a)		109,324		1,179,606
Coherus Biosciences, Inc.(a)		126,004		861,867
Collegium Pharmaceutical, Inc.(a)		57,401		1,377,050
Crinetics Pharmaceuticals, Inc.(a)		89,909		1,443,939

Security	Shares		Value
Biotechnology (continued)
CTI BioPharma Corp.(a)		171,561	$	720,556
Cullinan Oncology, Inc.(a)		44,719		457,475
Cytokinetics, Inc.(a)(b)		140,251		4,935,433
Day One Biopharmaceuticals, Inc.(a)		47,469		634,661
Deciphera Pharmaceuticals, Inc.(a)		88,297		1,364,189
Denali Therapeutics, Inc.(a)		186,117		4,288,136
Design Therapeutics, Inc.(a)		61,166		352,928
Douglas Elliman, Inc.		125,923		391,621
Dynavax Technologies Corp.(a)		204,878		2,009,853
Dyne Therapeutics, Inc.(a)		53,917		621,124
Editas Medicine, Inc.(a)(b)		119,189		864,120
Eiger BioPharmaceuticals, Inc.(a)(b)		63,298		56,772
Emergent BioSolutions, Inc.(a)		86,397		895,073
Enochian Biosciences, Inc.(a)(b)		30,528		27,936
EQRx, Inc.(a)		343,293		665,988
Erasca, Inc.(a)		127,392		383,450
EyePoint Pharmaceuticals, Inc.(a)(b)		42,891		126,100
Fate Therapeutics, Inc.(a)		142,775		813,817
FibroGen, Inc.(a)(b)		149,499		2,789,651
Foghorn Therapeutics, Inc.(a)(b)		32,469		201,308
Fulcrum Therapeutics, Inc.(a)(b)		95,233		271,414
Generation Bio Co.(a)(b)		79,184		340,491
Geron Corp.(a)		730,274		1,584,695
Gossamer Bio, Inc.(a)(b)		99,288		125,103
GreenLight Biosciences Holdings PBC(a)(b)		115,845		50,091
Halozyme Therapeutics, Inc.(a)		227,501		8,688,263
Heron Therapeutics, Inc.(a)(b)		185,313		279,823
HilleVax, Inc.(a)(b)		28,848		476,857
Humacyte, Inc.(a)		93,000		287,370
Icosavax, Inc.(a)		38,731		224,640
Ideaya Biosciences, Inc.(a)(b)		75,541		1,037,178
IGM Biosciences, Inc.(a)		17,415		239,282
ImmunityBio, Inc.(a)(b)		149,478		272,050
ImmunoGen, Inc.(a)		367,006		1,409,303
Immunovant, Inc.(a)		76,012		1,178,946
Inhibrx, Inc.(a)		55,669		1,050,474
Inovio Pharmaceuticals, Inc.(a)(b)		438,909		359,905
Insmed, Inc.(a)(b)		231,217		3,942,250
Instil Bio, Inc.(a)		107,503		71,038
Intellia Therapeutics, Inc.(a)		141,692		5,280,861
Intercept Pharmaceuticals, Inc.(a)		41,948		563,362
Invitae Corp.(a)(b)		423,515		571,745
Invivyd, Inc.(a)		80,990		97,188
Iovance Biotherapeutics, Inc.(a)		258,067		1,576,789
iTeos Therapeutics, Inc.(a)		40,101		545,775
IVERIC bio, Inc.(a)		233,287		5,675,873
Janux Therapeutics, Inc.(a)(b)		29,586		357,991
Jounce Therapeutics, Inc.(a)		63,561		117,588
KalVista Pharmaceuticals, Inc.(a)		42,833		336,667
Karuna Therapeutics, Inc.(a)		55,357		10,055,045
Karyopharm Therapeutics, Inc.(a)(b)		133,340		518,693
Keros Therapeutics, Inc.(a)		32,853		1,402,823
Kezar Life Sciences, Inc.(a)(b)		93,493		292,633
Kiniksa Pharmaceuticals Ltd., Class A(a)		54,000		581,040
Kinnate Biopharma, Inc.(a)		46,139		288,369
Kodiak Sciences, Inc.(a)		58,852		364,882
Kronos Bio, Inc.(a)		65,413		95,503
Krystal Biotech, Inc.(a)(b)		36,465		2,919,388
Kura Oncology, Inc.(a)		111,057		1,358,227
Kymera Therapeutics, Inc.(a)(b)		64,626		1,914,868
Lexicon Pharmaceuticals, Inc.(a)		142,153		345,432
Ligand Pharmaceuticals, Inc.(a)		25,854		1,901,820

4

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Biotechnology (continued)
Lyell Immunopharma, Inc.(a)(b)		293,410	$	692,448
MacroGenics, Inc.(a)		102,595		735,606
Madrigal Pharmaceuticals, Inc.(a)		21,748		5,268,670
MannKind Corp.(a)		434,669		1,782,143
MaxCyte, Inc.(a)		149,124		738,164
MeiraGTx Holdings PLC(a)		57,379		296,649
Mersana Therapeutics, Inc.(a)		158,520		651,517
MiMedx Group, Inc.(a)(b)		190,280		648,855
Mineralys Therapeutics, Inc.(a)		20,506		321,124
Mirum Pharmaceuticals, Inc.(a)		31,447		755,357
Monte Rosa Therapeutics, Inc.(a)(b)		50,257		391,502
Morphic Holding, Inc.(a)		44,037		1,657,553
Myriad Genetics, Inc.(a)		135,807		3,154,797
Nautilus Biotechnology, Inc.(a)		73,637		203,974
NGM Biopharmaceuticals, Inc.(a)		70,260		286,661
Nkarta, Inc.(a)		61,480		218,254
Nurix Therapeutics, Inc.(a)(b)		79,264		703,864
Nuvalent, Inc., Class A(a)(b)		34,346		896,087
Ocugen, Inc.(a)		397,267		338,908
OPKO Health, Inc.(a)(b)		686,184		1,001,829
Outlook Therapeutics, Inc.(a)(b)		261,763		285,322
Pacific Biosciences of California, Inc.(a)(b)		422,947		4,897,726
Pardes Biosciences, Inc.(a)		43,775		57,783
PepGen, Inc.(a)		23,976		293,226
Phathom Pharmaceuticals, Inc.(a)(b)		40,533		289,406
PMV Pharmaceuticals, Inc.(a)(b)		67,477		321,865
Point Biopharma Global, Inc.(a)		147,696		1,073,750
Praxis Precision Medicines, Inc.(a)(b)		63,406		51,295
Precigen, Inc.(a)(b)		198,937		210,873
Prime Medicine, Inc.(a)(b)		17,259		212,286
Prometheus Biosciences, Inc.(a)		59,418		6,376,740
Protagonist Therapeutics, Inc.(a)		79,571		1,830,133
Prothena Corp. PLC(a)		66,851		3,240,268
Provention Bio, Inc.(a)		107,942		2,601,402
PTC Therapeutics, Inc.(a)		119,945		5,810,136
Quantum-Si, Inc.(a)		164,592		289,682
RadNet, Inc.(a)		85,259		2,134,033
Rallybio Corp.(a)		30,876		176,302
RAPT Therapeutics, Inc.(a)		51,028		936,364
Recursion Pharmaceuticals, Inc., Class A(a)(b)		228,738		1,525,682
REGENXBIO, Inc.(a)		68,845		1,301,859
Relay Therapeutics, Inc.(a)		145,452		2,395,594
Relmada Therapeutics, Inc.(a)(b)		43,965		99,361
Replimune Group, Inc.(a)		79,798		1,409,233
Revolution Medicines, Inc.(a)		148,607		3,218,828
Rigel Pharmaceuticals, Inc.(a)		305,297		402,992
Rocket Pharmaceuticals, Inc.(a)(b)		95,498		1,635,881
Sage Therapeutics, Inc.(a)(b)		88,942		3,732,006
Sana Biotechnology, Inc.(a)(b)		153,410		501,651
Sangamo Therapeutics, Inc.(a)(b)		219,540		386,390
Science 37 Holdings, Inc.(a)		96,182		27,085
Seres Therapeutics, Inc.(a)		120,361		682,447
Singular Genomics Systems, Inc.(a)(b)		83,527		101,068
SomaLogic, Inc.(a)(b)		262,732		669,967
SpringWorks Therapeutics, Inc.(a)(b)		61,689		1,587,875
Stoke Therapeutics, Inc.(a)		39,290		327,286
Sutro Biopharma, Inc.(a)		95,811		442,647
Talaris Therapeutics, Inc.(a)		32,454		61,013
Tango Therapeutics, Inc.(a)		82,076		324,200
Tenaya Therapeutics, Inc.(a)		78,755		224,452
Travere Therapeutics, Inc.(a)		105,238		2,366,803
Twist Bioscience Corp.(a)(b)		97,435		1,469,320

Security	Shares		Value
Biotechnology (continued)
Tyra Biosciences, Inc.(a)(b)		22,136	$	355,725
Vanda Pharmaceuticals, Inc.(a)		95,432		647,983
Vaxart, Inc.(a)(b)		196,290		148,533
Vaxcyte, Inc.(a)		122,502		4,591,375
VBI Vaccines, Inc.(a)(b)		310,101		93,961
Vera Therapeutics, Inc.(a)(b)		38,865		301,592
Veracyte, Inc.(a)		122,436		2,730,323
Vericel Corp.(a)		80,659		2,364,922
Verve Therapeutics, Inc.(a)(b)		80,038		1,154,148
Vir Biotechnology, Inc.(a)		124,049		2,886,620
Viridian Therapeutics, Inc.(a)		65,404		1,663,878
VistaGen Therapeutics, Inc.(a)(b)		304,040		37,914
Xencor, Inc.(a)(b)		96,744		2,698,190
Y-mAbs Therapeutics, Inc.(a)		57,171		286,427
Zentalis Pharmaceuticals, Inc.(a)(b)		80,418		1,383,190
				260,033,934
Building Materials — 0.8%
Aspen Aerogels, Inc.(a)		86,157		641,870
BlueLinx Holdings, Inc.(a)		14,987		1,018,517
Caesarstone Ltd.		34,219		141,324
Gibraltar Industries, Inc.(a)		52,979		2,569,481
Griffon Corp.		74,458		2,383,401
Masonite International Corp.(a)(b)		38,013		3,450,440
Patrick Industries, Inc.		36,964		2,543,493
PGT Innovations, Inc.(a)		99,048		2,487,095
Quanex Building Products Corp.		56,404		1,214,378
Simpson Manufacturing Co., Inc.		72,998		8,003,501
Summit Materials, Inc., Class A(a)		203,145		5,787,601
				30,241,101
Building Products — 0.0%
Janus International Group, Inc.(a)		139,075		1,371,280
Building: Climate Control — 0.4%
AAON, Inc.		74,889		7,241,017
Comfort Systems USA, Inc.		60,511		8,832,186
View, Inc.(a)(b)		183,875		91,937
				16,165,140
Building: Roofing, Wallboard & Plumbing(a) — 0.2%
Beacon Roofing Supply, Inc.		86,813		5,108,945
JELD-WEN Holding, Inc.		142,332		1,801,923
				6,910,868
Cable Television Services(a) — 0.1%
AMC Networks, Inc., Class A		51,926		912,859
Liberty Latin America Ltd., Class A		64,549		536,402
Liberty Latin America Ltd., Class C		251,128		2,074,318
WideOpenWest, Inc.		91,708		974,856
				4,498,435
Capital Markets — 0.0%
Bakkt Holdings, Inc.(a)(b)		106,356		182,932
Perella Weinberg Partners		65,077		592,201
Victory Capital Holdings, Inc., Class A		27,947		818,009
				1,593,142
Casinos & Gambling — 0.4%
Accel Entertainment, Inc.(a)		95,001		865,459
Century Casinos, Inc.(a)		46,991		344,444
Full House Resorts, Inc.(a)(b)		57,565		416,195
Inspired Entertainment, Inc.(a)		37,289		476,926
International Game Technology PLC		167,578		4,491,091

SERIES  SCHEDULE  OF  INVESTMENTS 5

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Casinos & Gambling (continued)
Light & Wonder, Inc., Class A(a)		161,015	$	9,668,951
Monarch Casino & Resort, Inc.		22,794		1,690,175
				17,953,241
Cement — 0.0%
Concrete Pumping Holdings, Inc.(a)		46,275		314,670
Chemicals — 0.0%
Perimeter Solutions SA(a)		200,354		1,618,860
Chemicals: Diversified — 0.9%
AdvanSix, Inc.		45,675		1,747,982
American Vanguard Corp.		48,003		1,050,306
Avient Corp.		152,998		6,297,398
Cabot Corp.		94,833		7,268,001
CSW Industrials, Inc.		24,774		3,441,852
Danimer Scientific, Inc.(a)(b)		156,759		540,819
Ecovyst, Inc.(a)		145,076		1,603,090
Hawkins, Inc.		32,009		1,401,354
Ingevity Corp.(a)		64,182		4,590,297
Lifecore Biomedical, Inc.(a)(b)		42,588		160,770
LSB Industries, Inc.(a)(b)		126,362		1,305,319
Origin Materials, Inc.(a)(b)		180,127		769,142
PureCycle Technologies, Inc.(a)(b)		181,434		1,270,038
Rayonier Advanced Materials, Inc.(a)		105,430		661,046
Sensient Technologies Corp.		71,634		5,484,299
Valhi, Inc.		3,801		66,175
				37,657,888
Chemicals: Specialty — 0.8%
Amyris, Inc.(a)(b)		347,325		472,362
Balchem Corp.		53,115		6,717,985
FutureFuel Corp.		42,722		315,288
Innospec, Inc.		41,019		4,211,421
Livent Corp.(a)		276,949		6,015,332
Orion Engineered Carbons SA		103,462		2,699,324
Park Aerospace Corp.		34,710		466,849
Quaker Chemical Corp.		23,133		4,579,177
Stepan Co.		36,519		3,762,553
Trinseo PLC		59,727		1,245,308
Tronox Holdings PLC, Class A		199,902		2,874,591
				33,360,190
Coal — 0.4%
Arch Resources, Inc.		25,408		3,340,135
CONSOL Energy, Inc.		58,688		3,419,750
Peabody Energy Corp.(a)(b)		201,222		5,151,283
Ramaco Resources, Inc.		37,579		331,071
Warrior Met Coal, Inc.		88,125		3,235,069
				15,477,308
Commercial Banks — 0.0%
Dime Community Bancshares, Inc.		55,972		1,271,684
HomeTrust Bancshares, Inc.		24,414		600,340
				1,872,024
Commercial Finance & Mortgage Companies — 0.3%
Federal Agricultural Mortgage Corp., Class C		15,502		2,064,711
Pathward Financial, Inc.		41,748		1,732,125
PennyMac Financial Services, Inc.		45,886		2,735,264
RE/MAX Holdings, Inc., Class A		31,917		598,763
Velocity Financial, Inc.(a)		17,616		159,073
Walker & Dunlop, Inc.		52,552		4,002,886
				11,292,822

Security	Shares		Value
Commercial Services & Supplies — 0.1%
ACV Auctions, Inc., Class A(a)(b)		201,302	$	2,598,809
Aris Water Solution, Inc., Class A		39,107		304,644
Information Services Group, Inc.		54,901		279,446
Li-Cycle Holdings Corp.(a)(b)		233,759		1,316,063
National Research Corp.		23,790		1,035,103
				5,534,065
Commercial Services: Rental & Leasing — 0.8%
GATX Corp.		59,296		6,523,746
GMS, Inc.(a)		71,438		4,135,546
H&E Equipment Services, Inc.		54,394		2,405,847
Herc Holdings, Inc.		42,960		4,893,144
McGrath RentCorp		40,614		3,789,692
NOW, Inc.(a)		188,772		2,104,808
Rush Enterprises, Inc., Class B		10,869		650,944
Triton International Ltd.		99,498		6,290,263
				30,793,990
Commercial Vehicles & Parts — 0.3%
Blue Bird Corp.(a)(b)		29,764		608,078
Miller Industries, Inc.		18,690		660,691
Modine Manufacturing Co.(a)		84,899		1,956,922
Motorcar Parts of America, Inc.(a)		29,868		222,218
REV Group, Inc.		56,532		677,819
Rush Enterprises, Inc., Class A		70,591		3,854,269
Shyft Group, Inc.		58,976		1,341,704
Wabash National Corp.		81,275		1,998,552
				11,320,253
Communications Equipment(a) — 0.1%
CommScope Holding Co., Inc.		350,760		2,234,341
Ondas Holdings, Inc.(b)		60,819		65,685
				2,300,026
Communications Technology — 0.9%
908 Devices, Inc.(a)(b)		38,283		329,234
AdTheorent Holding Co., Inc.(a)		58,110		98,206
ADTRAN Holdings, Inc.		131,741		2,089,412
Anterix, Inc.(a)		31,771		1,049,714
Aviat Networks, Inc.(a)(b)		10,089		347,667
Bandwidth, Inc., Class A(a)		40,212		611,222
Calix, Inc.(a)		98,310		5,268,433
Casa Systems, Inc.(a)		55,675		70,707
Comtech Telecommunications Corp.		42,496		530,350
Digi International, Inc.(a)		59,914		2,017,904
DZS, Inc.(a)(b)		36,771		290,123
EchoStar Corp., Class A(a)		58,050		1,061,735
Extreme Networks, Inc.(a)		215,566		4,121,622
Harmonic, Inc.(a)(b)		157,955		2,304,564
Infinera Corp.(a)(b)		331,119		2,569,483
Inseego Corp.(a)(b)		146,601		85,380
InterDigital, Inc.		50,927		3,712,578
Maxar Technologies, Inc.		125,735		6,420,029
NETGEAR, Inc.(a)		48,028		888,998
Ooma, Inc.(a)		39,885		498,961
Ribbon Communications, Inc.(a)		123,868		423,629
				34,789,951
Computer Services Software & Systems — 5.4%
A10 Networks, Inc.		109,433		1,695,117
ACI Worldwide, Inc.(a)		189,033		5,100,110
Adeia, Inc.		174,799		1,548,719
Alarm.com Holdings, Inc.(a)		81,249		4,085,200
Alkami Technology, Inc.(a)		62,103		786,224
Altair Engineering, Inc., Class A(a)(b)		86,690		6,251,216

6

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Computer Services Software & Systems (continued)
American Software, Inc., Class A		52,102	$	657,006
Appfolio, Inc., Class A(a)(b)		33,433		4,161,740
Appian Corp., Class A(a)(b)		68,387		3,035,015
Applied Digital Corp.(a)		105,783		236,954
Asana, Inc., Class A(a)		125,973		2,661,809
Aterian, Inc.(a)(b)		94,084		80,922
Avantax, Inc.(a)		81,675		2,149,686
Avid Technology, Inc.(a)		59,314		1,896,862
BigCommerce Holdings, Inc., Series-1(a)		111,466		996,506
Blackbaud, Inc.(a)		79,322		5,497,015
Blackline, Inc.(a)		94,361		6,336,341
Box, Inc., Class A(a)		239,062		6,404,471
Brightcove, Inc.(a)		73,596		327,502
Cargurus, Inc.(a)		174,490		3,259,473
Cerence, Inc.(a)		69,069		1,940,148
Cleanspark, Inc.(a)(b)		127,582		354,678
CommVault Systems, Inc.(a)		74,269		4,214,023
CSG Systems International, Inc.		51,848		2,784,238
Digimarc Corp.(a)(b)		23,506		461,893
Digital Turbine, Inc.(a)		160,553		1,984,435
DigitalOcean Holdings, Inc.(a)(b)		119,241		4,670,670
Domo, Inc., Class B(a)		53,060		752,921
E2open Parent Holdings, Inc.(a)(b)		340,948		1,984,317
Ebix, Inc.		45,067		594,434
Edgio, Inc.(a)(b)		215,777		170,701
Envestnet, Inc.(a)(b)		80,710		4,735,256
ePlus, Inc.(a)		44,351		2,174,973
Eventbrite, Inc., Class A(a)		133,692		1,147,077
Everbridge, Inc.(a)		68,375		2,370,561
EverQuote, Inc., Class A(a)(b)		34,384		477,938
Evolent Health, Inc., Class A(a)		140,009		4,543,292
fuboTV, Inc.(a)		341,796		413,573
Grid Dynamics Holdings, Inc.(a)		90,431		1,036,339
Groupon, Inc.(a)(b)		36,579		153,998
LivePerson, Inc.(a)		120,853		532,962
LiveRamp Holdings, Inc.(a)		109,104		2,392,651
Magnite, Inc.(a)		226,167		2,094,306
Marathon Digital Holdings, Inc.(a)(b)		200,821		1,751,159
MicroStrategy, Inc., Class A(a)(b)		16,511		4,826,495
Mitek Systems, Inc.(a)(b)		72,413		694,441
Momentive Global, Inc.(a)		223,140		2,079,665
Multiplan Corp.(a)(b)		638,803		677,131
NetScout Systems, Inc.(a)		116,436		3,335,891
ON24, Inc.(a)		70,989		621,864
OneSpan, Inc.(a)		67,640		1,183,700
Ouster, Inc.(a)(b)		460,837		385,582
PagerDuty, Inc.(a)		147,831		5,171,128
PAR Technology Corp.(a)(b)		45,437		1,543,041
Parsons Corp.(a)		58,005		2,595,144
PDF Solutions, Inc.(a)		51,380		2,178,512
Perficient, Inc.(a)(b)		58,473		4,221,166
Progress Software Corp.		73,523		4,223,896
PROS Holdings, Inc.(a)		69,690		1,909,506
Q2 Holdings, Inc.(a)		95,689		2,355,863
Rackspace Technology, Inc.(a)(b)		89,351		167,980
Rapid7, Inc.(a)		100,907		4,632,640
Red Violet, Inc.(a)		14,638		257,629
Rimini Street, Inc.(a)		84,741		349,133
Riot Blockchain, Inc.(a)(b)		271,423		2,711,516
Sapiens International Corp. NV		53,443		1,160,782
Schrodinger, Inc.(a)(b)		92,238		2,428,627
SecureWorks Corp., Class A(a)(b)		13,813		118,377

Security	Shares		Value
Computer Services Software & Systems (continued)
ShotSpotter, Inc.(a)(b)		14,683	$	577,336
Shutterstock, Inc.		41,012		2,977,471
Simulations Plus, Inc.		26,739		1,174,912
Sprout Social, Inc., Class A(a)(b)		79,917		4,865,347
SPS Commerce, Inc.(a)		61,854		9,420,364
Sumo Logic, Inc.(a)		201,614		2,415,336
TechTarget, Inc.(a)		46,339		1,673,765
Telos Corp.(a)		87,285		220,831
Tenable Holdings, Inc.(a)		191,034		9,076,025
Tucows, Inc., Class A(a)		17,444		339,286
Unisys Corp.(a)		115,907		449,719
Upland Software, Inc.(a)		54,690		235,167
Upwork, Inc.(a)		207,994		2,354,492
Varonis Systems, Inc.(a)		182,939		4,758,243
Verint Systems, Inc.(a)		111,128		4,138,407
Veritone, Inc.(a)(b)		56,140		327,296
Verra Mobility Corp.(a)(b)		239,930		4,059,616
Viant Technology, Inc., Class A(a)		18,892		82,180
Workiva, Inc.(a)		81,437		8,339,963
Yelp, Inc.(a)		115,748		3,553,464
Yext, Inc.(a)(b)		192,118		1,846,254
Zuora, Inc., Class A(a)		215,478		2,128,923
				215,748,537
Computer Technology — 0.9%
3D Systems Corp.(a)		217,558		2,332,222
Cantaloupe, Inc.(a)		98,031		558,777
Corsair Gaming, Inc.(a)(b)		69,213		1,270,058
Diebold Nixdorf, Inc.(a)		112,326		134,791
Identiv, Inc.(a)		33,764		207,311
Impinj, Inc.(a)(b)		36,657		4,967,757
Insight Enterprises, Inc.(a)		53,734		7,681,813
PC Connection, Inc.		18,648		838,414
Super Micro Computer, Inc.(a)(b)		80,133		8,538,171
Synaptics, Inc.(a)		67,827		7,538,971
				34,068,285
Construction — 0.6%
Construction Partners, Inc., Class A(a)(b)		67,649		1,822,464
EMCOR Group, Inc.		80,647		13,112,396
Granite Construction, Inc.		75,690		3,109,345
Great Lakes Dredge & Dock Corp.(a)		108,072		586,831
Primoris Services Corp.		88,332		2,178,267
Sterling Infrastructure, Inc.(a)		50,072		1,896,727
Tutor Perini Corp.(a)		72,874		449,633
				23,155,663
Consumer Electronics(a) — 0.1%
Sonos, Inc.(b)		218,514		4,287,244
Universal Electronics, Inc.		22,398		227,116
Vuzix Corp.(b)		103,757		429,554
				4,943,914
Consumer Finance(a) — 0.0%
Consumer Portfolio Services, Inc.(b)		17,579		187,919
Moneylion, Inc.(b)		223,276		126,776
NerdWallet, Inc., Class A(b)		44,474		719,589
OppFi, Inc.		20,875		42,794
Sunlight Financial Holdings, Inc.		37,549		11,727
				1,088,805
Consumer Lending — 0.5%
Curo Group Holdings Corp.		32,093		55,521
Encore Capital Group, Inc.(a)		39,706		2,003,168
Enova International, Inc.(a)		52,572		2,335,774

SERIES  SCHEDULE  OF  INVESTMENTS 7

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Consumer Lending (continued)
Ezcorp, Inc., Class A(a)		84,307	$	725,040
LendingTree, Inc.(a)		18,026		480,573
Marcus & Millichap, Inc.		43,395		1,393,414
MoneyGram International, Inc.(a)		151,093		1,574,389
Navient Corp.		174,345		2,787,777
Nelnet, Inc., Class A		24,808		2,279,607
Oportun Financial Corp.(a)		52,856		204,024
PRA Group, Inc.(a)		65,891		2,567,113
PROG Holdings, Inc.(a)(b)		85,446		2,032,760
Regional Management Corp.		13,515		352,606
World Acceptance Corp.(a)		6,809		567,122
				19,358,888
Consumer Services: Miscellaneous — 0.4%
Cars.com, Inc.(a)		113,017		2,181,228
Chuy’s Holdings, Inc.(a)		30,374		1,088,908
FirstCash Holdings, Inc.		64,290		6,131,337
Franchise Group, Inc.		44,619		1,215,868
KAR Auction Services, Inc.(a)		183,011		2,503,591
Udemy, Inc.(a)		124,815		1,102,116
WW International, Inc.(a)(b)		97,117		400,122
				14,623,170
Containers & Packaging — 0.4%
Cryptyde, Inc.(a)		28,356		2,359
Greif, Inc., Class A		42,654		2,702,984
Greif, Inc., Class B		8,885		679,880
Myers Industries, Inc.		61,870		1,325,874
O-I Glass, Inc.(a)		262,624		5,964,191
Pactiv Evergreen, Inc.		72,226		577,808
Ranpak Holdings Corp.(a)		75,986		396,647
UFP Technologies, Inc.(a)		11,622		1,509,001
Veritiv Corp.		22,326		3,017,136
				16,175,880
Cosmetics — 0.3%
elf Beauty, Inc.(a)		84,008		6,918,059
Inter Parfums, Inc.		30,655		4,360,367
				11,278,426
Diversified Consumer Services(a) — 0.3%
Beachbody Co., Inc.(b)		161,696		77,970
Duolingo, Inc.(b)		41,093		5,859,451
Frontdoor, Inc.		141,569		3,946,944
Nerdy, Inc.		94,208		393,789
Rover Group, Inc.(b)		158,679		718,816
				10,996,970
Diversified Financial Services — 0.7%
Alerus Financial Corp.		26,712		428,728
Associated Capital Group, Inc., Class A		3,113		115,025
Cannae Holdings, Inc.(a)		118,382		2,388,949
Compass Diversified Holdings		105,027		2,003,915
European Wax Center, Inc., Class A		41,619		790,761
Houlihan Lokey, Inc.		86,796		7,593,782
Jackson Financial, Inc., Class A		127,726		4,778,230
MBIA, Inc.(a)		82,233		761,477
MidWestOne Financial Group, Inc.		24,085		588,156
Moelis & Co., Class A		108,819		4,183,002
Piper Sandler Cos		29,675		4,113,252
SWK Holdings Corp.(a)(b)		5,499		98,212
Tiptree, Inc.		43,249		630,138
				28,473,627

Security	Shares		Value
Diversified Manufacturing Operations — 0.6%
Barnes Group, Inc.		81,436	$	3,280,242
Custom Truck One Source, Inc.(a)(b)		101,003		685,810
Enerpac Tool Group Corp.		97,949		2,497,700
Federal Signal Corp.		101,855		5,521,560
Harsco Corp.(a)		134,157		916,292
Luxfer Holdings PLC		45,697		772,279
OSI Systems, Inc.(a)		27,406		2,805,278
PowerSchool Holdings, Inc., Class A(a)		77,999		1,545,940
Standex International Corp.		20,282		2,483,328
TriMas Corp.		70,809		1,972,739
				22,481,168
Diversified Materials & Processing — 0.4%
Belden, Inc.		72,558		6,295,858
Encore Wire Corp.		30,215		5,599,746
Insteel Industries, Inc.		31,411		873,854
Koppers Holdings, Inc.		33,637		1,176,286
NL Industries, Inc.		14,377		87,124
Tredegar Corp.		47,451		433,228
Uranium Energy Corp.(a)(b)		612,277		1,763,358
				16,229,454
Diversified Media — 0.0%
EW Scripps Co., Class A(a)		99,652		937,725
Diversified Retail — 0.3%
Big Lots, Inc.		49,137		538,541
Dillard’s, Inc., Class A(b)		6,803		2,093,147
Duluth Holdings, Inc., Class B(a)		21,183		135,147
Global Industrial Co.		22,486		603,524
Overstock.com, Inc.(a)(b)		73,080		1,481,332
Porch Group, Inc.(a)(b)		129,953		185,833
PriceSmart, Inc.		43,787		3,129,895
Revolve Group, Inc.(a)		70,023		1,841,605
Stitch Fix, Inc., Class A(a)		144,003		735,855
Winmark Corp.		4,797		1,537,103
				12,281,982
Diversified Telecommunication Services — 0.0%
Charge Enterprises, Inc.(a)(b)		207,979		228,777
Drug & Grocery Store Chains — 0.3%
Ingles Markets, Inc., Class A		24,336		2,158,603
PetMed Express, Inc.		34,996		568,335
Rite Aid Corp.(a)(b)		104,122		233,233
Sprouts Farmers Market, Inc.(a)		181,187		6,346,981
Village Super Market, Inc., Class A		13,818		316,156
Weis Markets, Inc.		28,049		2,374,909
				11,998,217
Education Services — 0.7%
2U, Inc.(a)(b)		131,366		899,857
Adtalem Global Education, Inc.(a)		76,754		2,964,239
American Public Education, Inc.(a)		30,013		162,670
Chegg, Inc.(a)		212,778		3,468,281
Coursera, Inc.(a)		195,152		2,248,151
Franklin Covey Co.(a)		20,950		805,947
Graham Holdings Co., Class B		6,290		3,747,834
HealthStream, Inc.(a)		41,621		1,127,929
Laureate Education, Inc., Class A		229,658		2,700,778
Perdoceo Education Corp.(a)		114,978		1,544,155
Strategic Education, Inc.		38,729		3,479,026

8

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Education Services (continued)
Stride, Inc.(a)		71,834	$	2,819,484
Universal Technical Institute, Inc.(a)		55,799		411,797
				26,380,148
Electrical Equipment(a) — 0.3%
Energy Vault Holdings, Inc.		147,262		315,141
Enovix Corp.(b)		185,934		2,772,276
ESS Tech, Inc.(b)		124,621		173,223
Fluence Energy, Inc.(b)		62,733		1,270,343
Heliogen, Inc.		148,599		35,694
NuScale Power Corp.(b)		53,856		489,551
Shoals Technologies Group, Inc., Class A(b)		277,995		6,335,506
				11,391,734
Electronic Components — 0.9%
AEye, Inc.(a)		128,643		40,497
Array Technologies, Inc.(a)(b)		257,564		5,635,500
Methode Electronics, Inc.		59,897		2,628,280
MicroVision, Inc.(a)(b)		283,119		755,928
Novanta, Inc.(a)		59,892		9,528,218
Rogers Corp.(a)		31,789		5,195,276
Sanmina Corp.(a)		97,267		5,932,314
ScanSource, Inc.(a)		41,855		1,274,066
Stem, Inc.(a)(b)		246,835		1,399,555
TTM Technologies, Inc.(a)		173,279		2,337,534
				34,727,168
Electronic Entertainment — 0.0%
Turtle Beach Corp.(a)		27,194		272,484
Electronic Equipment, Instruments & Components(a) — 0.1%
Evolv Technologies Holdings, Inc.(b)		142,998		446,154
Focus Universal, Inc.(b)		41,020		102,550
Lightwave Logic, Inc.(b)		185,652		970,960
Mirion Technologies, Inc.(b)		234,211		2,000,162
SmartRent, Inc.		215,206		548,775
				4,068,601
Electronics(a) — 0.3%
Agilysys, Inc.		33,807		2,789,416
Integer Holdings Corp.(b)		56,375		4,369,062
iRobot Corp.		46,054		2,009,797
NEXTracker, Inc., Class A		52,751		1,912,751
nLight, Inc.		75,144		764,966
				11,845,992
Energy Equipment — 0.9%
API Group Corp.(a)		353,002		7,935,485
Arcosa, Inc.		82,743		5,221,911
Bloom Energy Corp., Class A(a)		307,250		6,123,492
Diamond Offshore Drilling, Inc.(a)		172,106		2,072,156
Expro Group Holdings NV(a)		148,149		2,720,016
FuelCell Energy, Inc.(a)(b)		699,415		1,993,333
Matador Resources Co.		192,538		9,174,436
SunPower Corp.(a)(b)		140,031		1,938,029
TPI Composites, Inc.(a)(b)		62,508		815,729
				37,994,587
Energy Equipment & Services(a) — 0.4%
Borr Drilling Ltd.		343,841		2,606,315
Valaris Ltd.		104,052		6,769,623
Weatherford International PLC		120,690		7,162,951
				16,538,889
Engineering & Contracting Services — 0.7%
Argan, Inc.		21,910		886,698

Security	Shares		Value
Engineering & Contracting Services (continued)
Dycom Industries, Inc.(a)		49,356	$	4,622,189
Exponent, Inc.		86,836		8,656,681
Fluor Corp.(a)		243,125		7,514,994
IES Holdings, Inc.(a)		14,185		611,232
MYR Group, Inc.(a)		27,982		3,526,012
NETSTREIT Corp.		95,784		1,750,931
VSE Corp.		17,432		782,697
Willdan Group, Inc.(a)		17,989		280,988
				28,632,422
Entertainment(a) — 0.3%
Cinemark Holdings, Inc.(b)		186,438		2,757,418
Golden Entertainment, Inc.		34,450		1,498,919
IMAX Corp.		80,691		1,547,653
Lions Gate Entertainment Corp., Class A(b)		102,598		1,135,760
Lions Gate Entertainment Corp., Class B		193,992		2,013,637
Playstudios, Inc.		132,843		490,191
Reservoir Media, Inc.		31,600		206,032
Skillz, Inc.(b)		574,885		341,022
				9,990,632
Environmental, Maintenance, & Security Service — 0.5%
ABM Industries, Inc.		111,885		5,028,112
BrightView Holdings, Inc.(a)		68,501		384,976
Brink’s Co.		76,643		5,119,752
Healthcare Services Group, Inc.		127,135		1,763,362
IBEX Holdings Ltd.(a)		15,374		375,126
Montrose Environmental Group, Inc.(a)(b)		46,936		1,674,207
SP Plus Corp.(a)		34,388		1,179,165
UniFirst Corp.		25,532		4,499,504
				20,024,204
Financial Data & Systems — 0.4%
Atlanticus Holdings Corp.(a)(b)		7,396		200,653
Cass Information Systems, Inc.		22,951		994,008
Donnelley Financial Solutions, Inc.(a)(b)		43,356		1,771,526
Everi Holdings, Inc.(a)		147,579		2,530,980
EVERTEC, Inc.		104,710		3,533,962
Green Dot Corp., Class A(a)		71,709		1,231,961
I3 Verticals, Inc., Class A(a)		39,466		968,101
International Money Express, Inc.(a)(b)		53,797		1,386,887
LendingClub Corp.(a)		180,800		1,303,568
Priority Technology Holdings, Inc.(a)		27,679		99,368
Repay Holdings Corp.(a)(b)		150,053		985,848
Value Line, Inc.(b)		1,578		76,265
				15,083,127
Financial Services — 0.2%
22nd Century Group, Inc.(a)(b)		252,696		194,323
Blue Foundry Bancorp(a)		45,959		437,530
Enact Holdings, Inc.		50,892		1,163,391
Karat Packaging, Inc.		8,762		116,797
Turning Point Brands, Inc.		26,455		555,555
Universal Corp.		41,446		2,192,079
Vector Group Ltd.		245,393		2,947,170
				7,606,845
Food & Staples Retailing — 0.0%
Natural Grocers by Vitamin Cottage, Inc.		14,822		174,159
Food Products(a) — 0.2%
Benson Hill, Inc.(b)		300,534		345,614
Beyond Meat, Inc.(b)		105,164		1,706,812
BRC, Inc.(b)		45,348		233,089

SERIES  SCHEDULE  OF  INVESTMENTS 9

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Food Products (continued)
Hain Celestial Group, Inc.		153,936	$	2,640,002
Local Bounti Corp.(b)		69,287		55,229
SunOpta, Inc.(b)		166,776		1,284,175
				6,264,921
Foods — 1.2%
AppHarvest, Inc.(a)		158,082		96,794
B&G Foods, Inc.		120,937		1,878,152
Chefs’ Warehouse, Inc.(a)(b)		58,497		1,991,823
HF Foods Group, Inc.(a)		54,160		212,307
Hostess Brands, Inc.(a)		228,218		5,678,064
J & J Snack Foods Corp.		25,989		3,852,090
John B Sanfilippo & Son, Inc.		15,293		1,482,197
Lancaster Colony Corp.		33,235		6,742,717
Medifast, Inc.		18,651		1,933,549
Mission Produce, Inc.(a)(b)		68,093		756,513
Nature’s Sunshine Products, Inc.(a)		19,301		197,063
Seneca Foods Corp., Class A(a)		8,506		444,609
Simply Good Foods Co.(a)		151,812		6,037,563
Sovos Brands, Inc.(a)		65,675		1,095,459
SpartanNash Co.		59,951		1,486,785
Tattooed Chef, Inc.(a)(b)		78,079		110,872
Tootsie Roll Industries, Inc.(b)		27,836		1,250,133
TreeHouse Foods, Inc.(a)		86,876		4,381,157
United Natural Foods, Inc.(a)		102,006		2,687,858
Utz Brands, Inc.		112,802		1,857,849
Vita Coco Co., Inc.(a)(b)		47,538		932,695
Vital Farms, Inc.(a)		51,048		781,034
Whole Earth Brands, Inc.(a)		61,190		156,646
				46,043,929
Forest Products — 0.3%
Boise Cascade Co.		67,457		4,266,655
UFP Industries, Inc.		102,129		8,116,192
				12,382,847
Forms & Bulk Printing Services — 0.1%
Deluxe Corp.		73,445		1,175,120
Ennis, Inc.		42,926		905,309
Quad/Graphics, Inc.(a)		53,805		230,824
				2,311,253
Fruit & Grain Processing — 0.1%
MGP Ingredients, Inc.		23,988		2,320,119
Funeral Parlors & Cemeteries — 0.2%
Carriage Services, Inc.		22,829		696,741
Hillenbrand, Inc.		118,170		5,616,620
Matthews International Corp., Class A		50,605		1,824,816
				8,138,177
Gas Pipeline — 0.1%
Equitrans Midstream Corp.		702,383		4,059,774
Kinetik Holdings, Inc., Class A		28,425		889,702
NextDecade Corp.(a)(b)		58,881		292,639
				5,242,115
Glass — 0.0%
Apogee Enterprises, Inc.		38,215		1,652,799

Security	Shares		Value
Gold(a) — 0.1%
Coeur Mining, Inc.(b)		475,986	$	1,899,184
Novagold Resources, Inc.		406,041		2,525,575
				4,424,759
Health Care Equipment & Services(b) — 0.1%
Embecta Corp.		98,385		2,766,586
Figs, Inc., Class A(a)		218,402		1,351,909
				4,118,495
Health Care Equipment & Supplies — 0.2%
AbCellera Biologics, Inc.(a)(b)		354,054		2,669,567
Adaptive Biotechnologies Corp.(a)		190,024		1,677,912
Inogen, Inc.(a)		40,440		504,692
Nano-X Imaging Ltd.(a)(b)		78,208		451,260
OmniAb, Inc.(a)		137,235		505,025
OmniAb, Inc.(c)		18,006		—
Paragon 28, Inc.(a)		83,314		1,422,170
PROCEPT BioRobotics Corp.(a)(b)		44,315		1,258,546
Vicarious Surgical, Inc.(a)		84,278		191,311
Zimvie, Inc.(a)		34,331		248,213
				8,928,696
Health Care Facilities — 0.6%
Apollo Medical Holdings, Inc.(a)		66,409		2,421,936
Brookdale Senior Living, Inc.(a)(b)		317,455		936,492
Ensign Group, Inc.		92,051		8,794,553
Joint Corp.(a)		23,183		390,170
LifeStance Health Group, Inc.(a)(b)		123,415		916,973
National HealthCare Corp.		21,763		1,263,777
RxSight, Inc.(a)		40,234		671,103
Select Medical Holdings Corp.		177,690		4,593,287
Sight Sciences, Inc.(a)		38,071		332,741
U.S. Physical Therapy, Inc.		21,985		2,152,551
				22,473,583
Health Care Management Services(a) — 0.4%
Computer Programs & Systems, Inc.		23,900		721,780
Hims & Hers Health, Inc.		207,292		2,056,337
Option Care Health, Inc.		285,507		9,070,557
Progyny, Inc.(b)		129,286		4,152,666
				16,001,340
Health Care Providers & Services(a) — 0.2%
23andMe Holding Co., Class A		440,570		1,004,500
Cano Health, Inc.(b)		291,984		265,705
CareMax, Inc.		92,130		245,987
Clover Health Investments Corp.(b)		661,511		559,043
DocGo, Inc.		140,894		1,218,733
Oncology Institute, Inc.		54,829		37,169
P3 Health Partners, Inc.(b)		39,295		41,653
R1 RCM, Inc.(b)		256,831		3,852,465
Sema4 Holdings Corp.		510,006		186,152
				7,411,407
Health Care Services — 1.7%
Accolade, Inc.(a)(b)		113,525		1,632,490
Addus HomeCare Corp.(a)		26,415		2,820,065
Agiliti, Inc.(a)(b)		47,358		756,781
AirSculpt Technologies, Inc.(b)		18,378		92,625
Alignment Healthcare, Inc.(a)(b)		168,209		1,069,809
American Well Corp., Class A(a)(b)		390,138		920,726
AMN Healthcare Services, Inc.(a)		74,041		6,142,441

10

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Health Care Services (continued)
ATI Physical Therapy, Inc.(a)		115,575	$	29,379
Aveanna Healthcare Holdings, Inc.(a)		74,403		77,379
Babylon Holdings Ltd./Jersey, Class A(a)(b)		6,729		34,251
Butterfly Network, Inc.(a)(b)		232,052		436,258
Cara Therapeutics, Inc.(a)		77,774		381,870
CorVel Corp.(a)		14,954		2,845,447
Cross Country Healthcare, Inc.(a)		61,092		1,363,573
Cue Health, Inc.(a)		177,312		322,708
Health Catalyst, Inc.(a)(b)		93,910		1,095,930
HealthEquity, Inc.(a)		141,763		8,322,906
Inari Medical, Inc.(a)		82,471		5,091,760
ModivCare, Inc.(a)		21,579		1,814,362
NeoGenomics, Inc.(a)		214,937		3,742,053
NextGen Healthcare, Inc.(a)		94,820		1,650,816
Omnicell, Inc.(a)		75,853		4,450,296
OptimizeRx Corp.(a)		28,157		411,937
Pear Therapeutics, Inc.(a)(b)		109,561		27,938
Pediatrix Medical Group, Inc.(a)		140,357		2,092,723
Pennant Group, Inc.(a)		44,756		639,116
Phibro Animal Health Corp., Class A		35,009		536,338
Phreesia, Inc.(a)		84,821		2,738,870
Privia Health Group, Inc.(a)(b)		88,304		2,438,073
Ryman Hospitality Properties, Inc.		91,927		8,248,610
Sharecare, Inc.(a)(b)		504,972		717,060
Surgery Partners, Inc.(a)(b)		87,949		3,031,602
Veradigm, Inc.(a)		183,728		2,397,650
				68,373,842
Health Care Technology — 0.0%
Nutex Health, Inc.(a)		438,550		442,936
Health Care: Miscellaneous(a) — 0.2%
Absci Corp.		86,413		151,223
Medpace Holdings, Inc.		43,356		8,153,096
PhenomeX, Inc.		120,665		139,971
				8,444,290
Home Building — 1.1%
Beazer Homes USA, Inc.(a)		50,427		800,781
Century Communities, Inc.		48,293		3,086,889
Hovnanian Enterprises, Inc., Class A(a)		8,030		544,755
Installed Building Products, Inc.		40,646		4,634,863
KB Home		129,856		5,217,614
Legacy Housing Corp.(a)		14,089		320,666
LGI Homes, Inc.(a)		35,089		4,001,199
M/I Homes, Inc.(a)		45,750		2,886,368
MDC Holdings, Inc.		99,347		3,861,618
Meritage Homes Corp.		62,024		7,241,922
Taylor Morrison Home Corp.(a)		178,375		6,824,627
Tile Shop Holdings, Inc.(a)		56,219		263,667
Tri Pointe Homes, Inc.(a)		172,795		4,375,169
				44,060,138
Hotel/Motel — 0.2%
Bally’s Corp.(a)		61,483		1,200,148
F45 Training Holdings, Inc.(a)		55,523		64,407
First Watch Restaurant Group, Inc.(a)		26,369		423,486
Krispy Kreme, Inc.		122,705		1,908,063
Marcus Corp.		42,218		675,488
NEOGAMES SA(a)		22,968		349,113
Red Rock Resorts, Inc., Class A		86,467		3,853,834
Xponential Fitness, Inc., Class A(a)		34,874		1,059,821
				9,534,360

Security	Shares		Value
Hotels, Restaurants & Leisure(a) — 0.0%
Bowlero Corp.		50,370	$	853,771
Inspirato, Inc.		45,205		43,347
Sonder Holdings, Inc.(b)		302,780		229,235
Vacasa, Inc., Class A		178,786		172,028
				1,298,381
Household Appliances — 0.0%
Landsea Homes Corp.(a)		13,542		82,065
National Presto Industries, Inc.		8,872		639,582
Snap One Holdings Corp.(a)		28,334		264,923
Traeger, Inc.(a)		59,759		245,609
				1,232,179
Household Durables(a)(b) — 0.0%
Dream Finders Homes, Inc., Class A		35,337		468,215
Vizio Holding Corp., Class A		115,806		1,063,099
				1,531,314
Household Equipment & Products — 0.4%
Central Garden & Pet Co.(a)		16,771		688,617
Central Garden & Pet Co., Class A(a)		68,563		2,678,756
Energizer Holdings, Inc.		121,579		4,218,791
Helen of Troy Ltd.(a)		40,647		3,868,375
Tupperware Brands Corp.(a)		71,031		177,578
Zurn Elkay Water Solutions Corp.		212,468		4,538,317
				16,170,434
Household Furnishings — 0.2%
American Woodmark Corp.(a)(b)		28,213		1,469,051
Ethan Allen Interiors, Inc.		38,753		1,064,157
La-Z-Boy, Inc.		73,666		2,142,207
Lifetime Brands, Inc.		19,521		114,783
Lovesac Co.(a)		23,904		690,826
Purple Innovation, Inc.(a)(b)		112,939		298,159
Sleep Number Corp.(a)		36,458		1,108,688
				6,887,871
Independent Power Producers & Energy Traders(a) — 0.0%
Altus Power, Inc.		156,777		859,138
Montauk Renewables, Inc.		106,852		840,925
				1,700,063
Industrial Conglomerates — 0.0%
Brookfield Business Corp., Class A		43,748		867,085
Insurance — 0.2%
Lemonade, Inc.(a)(b)		80,746		1,151,438
Marqeta, Inc., Class A(a)		742,452		3,393,006
Mercury General Corp.		45,783		1,453,152
Oscar Health, Inc., Class A(a)		205,727		1,345,455
Skyward Specialty Insurance Group, Inc.(a)		16,899		369,581
				7,712,632
Insurance: Life — 0.3%
American Equity Investment Life Holding Co.		121,006		4,415,509
Bright Health Group, Inc.(a)(b)		298,230		65,700
CNO Financial Group, Inc.		193,747		4,299,246
National Western Life Group, Inc., Class A		3,814		925,353
Selectquote, Inc.(a)		227,828		494,387
Trean Insurance Group, Inc.(a)		38,584		236,134
Trupanion, Inc.(a)(b)		66,649		2,858,575
				13,294,904
Insurance: Multi-Line — 0.4%
BRP Group, Inc., Class A(a)(b)		103,576		2,637,045
Crawford & Co., Class A		27,856		232,876

SERIES  SCHEDULE  OF  INVESTMENTS 11

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Insurance: Multi-Line (continued)
eHealth, Inc.(a)		43,442	$	406,617
Goosehead Insurance, Inc., Class A(a)		32,541		1,698,640
Horace Mann Educators Corp.		63,440		2,123,971
James River Group Holdings Ltd.		48,689		1,005,428
Mr. Cooper Group, Inc.(a)		118,336		4,848,226
SiriusPoint Ltd.(a)		157,335		1,279,134
				14,231,937
Insurance: Property-Casualty — 1.8%
AMERISAFE, Inc.		32,239		1,578,099
Argo Group International Holdings Ltd.		54,547		1,597,682
Donegal Group, Inc., Class A		27,114		414,302
Employers Holdings, Inc.		42,660		1,778,495
Enstar Group Ltd.(a)		19,144		4,437,388
Essent Group Ltd.		180,375		7,224,019
Genworth Financial, Inc., Class A(a)		761,926		3,824,869
Greenlight Capital Re Ltd., Class A(a)(b)		44,928		421,874
HCI Group, Inc.		11,047		592,119
Hilltop Holdings, Inc.		85,489		2,536,459
Investors Title Co.		2,120		320,120
Kinsale Capital Group, Inc.(b)		36,943		11,088,441
NI Holdings, Inc.(a)		17,790		231,270
NMI Holdings, Inc., Class A(a)		140,290		3,132,676
Palomar Holdings, Inc.(a)		41,443		2,287,654
ProAssurance Corp.		79,587		1,470,768
Radian Group, Inc.		251,110		5,549,531
RLI Corp.(b)		66,663		8,860,179
Safety Insurance Group, Inc.		21,629		1,611,793
Selective Insurance Group, Inc.		101,750		9,699,827
Stewart Information Services Corp.		40,510		1,634,578
United Fire Group, Inc.		36,041		956,889
Universal Insurance Holdings, Inc.		44,034		802,299
				72,051,331
International Trade & Diversified Logistic(a) — 0.1%
CryoPort, Inc.(b)		75,422		1,810,128
Radiant Logistics, Inc.		64,025		420,004
V2X, Inc.		20,528		815,372
				3,045,504
Internet & Catalog Retail(a) — 0.1%
BARK, Inc.(b)		193,194		280,131
ContextLogic, Inc., Class A(b)		998,629		445,189
Qurate Retail, Inc., Series A		600,046		592,725
RumbleON, Inc., Class B(b)		15,994		96,924
ThredUp, Inc., Class A(b)		106,641		269,802
Vivid Seats, Inc., Class A(b)		42,989		328,006
				2,012,777
Internet Software & Services(a) — 0.3%
1stdibs.com, Inc.		36,989		146,846
aka Brands Holding Corp.(b)		13,206		7,193
Boxed, Inc.		91,803		17,424
eGain Corp.		34,204		259,609
Flywire Corp.		97,519		2,863,158
Gogo, Inc.		85,304		1,236,908
Lulu’s Fashion Lounge Holdings, Inc.(b)		26,618		63,351
MediaAlpha, Inc., Class A		42,186		631,946
Outbrain, Inc.		61,698		254,813
Quotient Technology, Inc.		157,815		517,633
Remitly Global, Inc.		171,317		2,903,823
Rent the Runway, Inc., Class A(b)		86,971		247,867

Security	Shares		Value
Internet Software & Services (continued)
TrueCar, Inc.		153,975	$	354,143
Xometry, Inc., Class A(b)		58,473		875,341
				10,380,055
IT Services — 0.5%
Bread Financial Holdings, Inc.		45,593		1,382,380
Cerberus Cyber Sentinel Corp.(a)(b)		70,569		23,852
Cyxtera Technologies, Inc.(a)		60,210		18,388
Fastly, Inc., Class A(a)		194,111		3,447,411
Joby Aviation, Inc.(a)(b)		439,775		1,908,623
Markforged Holding Corp.(a)(b)		170,127		163,118
Payoneer Global, Inc.(a)		376,714		2,365,764
Paysafe Ltd.(a)		48,581		838,994
Sabre Corp.(a)(b)		557,558		2,391,924
SolarWinds Corp.(a)		83,082		714,505
Squarespace, Inc., Class A(a)		52,108		1,655,471
StoneCo Ltd., Class A(a)(b)		473,751		4,519,585
				19,430,015
Leisure Time — 0.8%
Acushnet Holdings Corp.(b)		56,789		2,892,832
AMMO, Inc.(a)(b)		154,888		305,129
Clarus Corp.		45,706		431,922
Hilton Grand Vacations, Inc.(a)		146,578		6,512,461
Johnson Outdoors, Inc., Class A		9,203		579,881
Latham Group, Inc.(a)(b)		68,765		196,668
Life Time Group Holdings, Inc.(a)		71,788		1,145,736
Lindblad Expeditions Holdings, Inc.(a)		57,593		550,589
Madison Square Garden Entertainment Corp.(a)		44,401		2,622,767
OneSpaWorld Holdings Ltd.(a)		113,297		1,358,431
Portillo’s, Inc., Class A(a)		54,681		1,168,533
RCI Hospitality Holdings, Inc.(b)		14,674		1,147,067
SeaWorld Entertainment, Inc.(a)(b)		67,849		4,159,822
Smith & Wesson Brands, Inc.		78,072		961,066
Sturm Ruger & Co., Inc.		29,570		1,698,501
Topgolf Callaway Brands Corp.(a)(b)		239,264		5,172,888
Vista Outdoor, Inc.(a)		95,516		2,646,748
				33,551,041
Luxury Items — 0.2%
Movado Group, Inc.		25,961		746,898
Signet Jewelers Ltd.		76,439		5,945,425
Stagwell, Inc.(a)		131,340		974,543
				7,666,866
Machinery(a) — 0.1%
Berkshire Grey, Inc.		75,406		104,060
Fathom Digital Manufacturing C		15,661		8,506
Hillman Solutions Corp.(b)		230,092		1,937,375
Hyzon Motors, Inc.(b)		146,569		119,468
Lightning eMotors, Inc.(b)		60,481		17,328
Matterport, Inc.		383,573		1,047,154
Microvast Holdings, Inc.(b)		298,361		369,968
Proterra, Inc.(b)		385,404		585,814
Sarcos Technology and Robotics Corp.(b)		177,959		84,477
Velo3D, Inc.(b)		104,479		237,167
Xos, Inc.(b)		84,540		44,384
				4,555,701
Machinery: Agricultural — 0.4%
Alamo Group, Inc.		17,206		3,168,657
Integral Ad Science Holding Corp.(a)		65,410		933,401
Lindsay Corp.		18,859		2,850,161
SPX Technologies, Inc.(a)		74,609		5,265,903

12

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Machinery: Agricultural (continued)
Titan International, Inc.(a)		87,340	$	915,323
Titan Machinery, Inc.(a)		34,629		1,054,453
				14,187,898
Machinery: Construction & Handling — 0.2%
Astec Industries, Inc.		37,374		1,541,678
Douglas Dynamics, Inc.		38,358		1,223,237
Manitowoc Co., Inc.(a)		58,793		1,004,772
NACCO Industries, Inc., Class A		6,262		225,870
Terex Corp.		113,929		5,511,885
				9,507,442
Machinery: Industrial — 1.1%
Applied Industrial Technologies, Inc.		65,346		9,287,627
Chart Industries, Inc.(a)(b)		72,899		9,141,535
Columbus McKinnon Corp.		46,692		1,735,075
Desktop Metal, Inc., Class A(a)(b)		457,522		1,052,301
DXP Enterprises, Inc.(a)		26,120		703,150
EnPro Industries, Inc.		35,577		3,696,095
Hydrofarm Holdings Group, Inc.(a)		71,262		123,283
Hyliion Holdings Corp.(a)		236,759		468,783
Hyster-Yale Materials Handling, Inc.		18,481		922,017
John Bean Technologies Corp.		53,987		5,900,239
Kadant, Inc.		19,843		4,137,662
Kennametal, Inc.		139,280		3,841,342
Nikola Corp.(a)(b)		581,143		703,183
Omega Flex, Inc.(b)		5,629		627,296
Proto Labs, Inc.(a)		46,457		1,540,050
Tennant Co.		30,778		2,109,216
				45,988,854
Machinery: Specialty — 0.1%
Albany International Corp., Class A		53,358		4,768,071
Manufactured Housing(a) — 0.3%
Cavco Industries, Inc.		14,861		4,721,934
Skyline Champion Corp.		91,097		6,853,227
				11,575,161
Marine — 0.1%
Golden Ocean Group Ltd.(b)		209,397		1,993,459
Media(a) — 0.2%
Arena Group Holdings, Inc.		17,516		74,443
Bumble, Inc., Class A		171,184		3,346,647
Gambling.com Group Ltd.		13,401		132,804
Innovid Corp.		122,274		172,406
Leafly Holdings, Inc.(b)		48,776		19,506
PubMatic, Inc., Class A(b)		74,312		1,026,992
Urban One, Inc.		31,333		198,552
Vimeo, Inc.		227,211		870,218
Vinco Ventures, Inc.(b)		369,042		118,573
Wejo Group Ltd.		29,266		14,428
ZipRecruiter, Inc., Class A(b)		124,709		1,987,861
				7,962,430
Medical & Dental Instruments & Supplies — 1.8%
Akoya Biosciences, Inc.(a)		25,409		207,846
Alphatec Holdings, Inc.(a)(b)		123,807		1,931,389
AngioDynamics, Inc.(a)		64,733		669,339
Anika Therapeutics, Inc.(a)		24,995		717,856
Artivion, Inc.(a)		66,334		868,975
AtriCure, Inc.(a)		77,943		3,230,737
Atrion Corp.		2,296		1,441,681
Avanos Medical, Inc.(a)		79,325		2,359,126

Security	Shares		Value
Medical & Dental Instruments & Supplies (continued)
Axogen, Inc.(a)		68,907	$	651,171
BioLife Solutions, Inc.(a)		57,514		1,250,930
Cardiovascular Systems, Inc.(a)		69,993		1,390,061
Cerus Corp.(a)		294,026		873,257
Community Health Systems, Inc.(a)		213,834		1,047,787
CONMED Corp.		49,774		5,169,528
Cutera, Inc.(a)(b)		28,448		671,942
LeMaitre Vascular, Inc.		33,267		1,712,253
LivaNova PLC(a)		92,014		4,009,970
Merit Medical Systems, Inc.(a)		95,246		7,043,442
NanoString Technologies, Inc.(a)(b)		79,322		785,288
Neogen Corp.(a)(b)		370,538		6,862,364
NuVasive, Inc.(a)		89,679		3,704,640
Ocular Therapeutix, Inc.(a)		132,637		698,997
OraSure Technologies, Inc.(a)		123,704		748,409
Organogenesis Holdings, Inc.(a)		116,971		249,148
Orthofix Medical, Inc.(a)		58,656		982,488
OrthoPediatrics Corp.(a)		26,020		1,152,426
Outset Medical, Inc.(a)(b)		82,861		1,524,642
Owens & Minor, Inc.(a)		126,169		1,835,759
Owlet, Inc.(a)(b)		20,593		6,680
Patterson Cos., Inc.		148,961		3,987,686
Pulmonx Corp.(a)		59,088		660,604
Senseonics Holdings, Inc.(a)(b)		813,072		577,281
STAAR Surgical Co.(a)		81,939		5,239,999
Surmodics, Inc.(a)		23,596		537,517
TransMedics Group, Inc.(a)		52,091		3,944,851
Treace Medical Concepts, Inc.(a)		62,920		1,584,955
Utah Medical Products, Inc.		5,607		531,375
ViewRay, Inc.(a)		253,085		875,674
				71,738,073
Medical Equipment — 1.6%
AdaptHealth Corp.(a)		123,398		1,533,837
Alpha Teknova, Inc.(a)		9,420		27,883
Bionano Genomics, Inc.(a)(b)		517,768		574,723
CareDx, Inc.(a)		87,350		798,379
Cytek Biosciences, Inc.(a)(b)		194,764		1,789,881
Glaukos Corp.(a)		78,180		3,916,818
Haemonetics Corp.(a)		85,619		7,084,972
Inspire Medical Systems, Inc.(a)		48,841		11,432,213
iRadimed Corp.		12,040		473,774
iRhythm Technologies, Inc.(a)(b)		51,520		6,390,026
Lantheus Holdings, Inc.(a)		116,716		9,636,073
Nevro Corp.(a)		59,771		2,160,722
Quanterix Corp.(a)		57,837		651,823
Seer, Inc., Class A(a)(b)		83,784		323,406
Shockwave Medical, Inc.(a)		60,800		13,183,264
SI-BONE, Inc.(a)(b)		57,931		1,139,503
Silk Road Medical, Inc.(a)		64,218		2,512,850
Tactile Systems Technology, Inc.(a)		34,536		567,081
Varex Imaging Corp.(a)		66,501		1,209,653
Zynex, Inc.(a)		36,047		432,564
				65,839,445
Medical Services(a) — 0.0%
Fulgent Genetics, Inc.		36,027		1,124,763
Innovage Holding Corp.		30,150		240,597
Inotiv, Inc.(b)		31,745		137,456
				1,502,816
Metal Fabricating — 0.8%
CompX International, Inc.		2,464		44,549

SERIES  SCHEDULE  OF  INVESTMENTS 13

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Metal Fabricating (continued)
Distribution Solutions Group, Inc.(a)		8,341	$	379,182
DMC Global, Inc.(a)		31,966		702,293
GrafTech International Ltd.(b)		330,956		1,608,446
Haynes International, Inc.		20,866		1,045,178
MRC Global, Inc.(a)		141,749		1,377,800
Mueller Industries, Inc.		95,546		7,020,720
Mueller Water Products, Inc., Class A		263,397		3,671,754
Northwest Pipe Co.(a)		16,799		524,633
RBC Bearings, Inc.(a)(b)		48,682		11,329,762
Worthington Industries, Inc.		53,682		3,470,542
				31,174,859
Metals & Minerals: Diversified — 1.0%
Alpha Metallurgical Resources, Inc.		26,058		4,065,048
Commercial Metals Co.		199,547		9,757,848
Compass Minerals International, Inc.		58,828		2,017,212
Constellium SE(a)		215,711		3,296,064
Energy Fuels, Inc.(a)(b)		267,578		1,493,085
Hecla Mining Co.(b)		945,036		5,982,078
Hycroft Mining Holding Corp.(a)(b)		233,212		100,841
Intrepid Potash, Inc.(a)(b)		19,555		539,718
Materion Corp.		34,378		3,987,848
Minerals Technologies, Inc.		54,687		3,304,189
PolyMet Mining Corp.(a)		49,605		106,651
Ring Energy, Inc.(a)		175,942		334,290
SunCoke Energy, Inc.		143,879		1,292,033
U.S. Lime & Minerals, Inc.		3,503		534,873
U.S. Silica Holdings, Inc.(a)		126,500		1,510,410
				38,322,188
Mining(a) — 0.1%
5E Advanced Materials, Inc.(b)		68,231		369,812
Dakota Gold Corp.		89,236		323,034
Piedmont Lithium, Inc.(b)		29,708		1,783,966
				2,476,812
Office Supplies & Equipment — 0.2%
ACCO Brands Corp.		154,740		823,217
Eastman Kodak Co.(a)		96,363		395,088
HNI Corp.		70,338		1,958,210
Kimball International, Inc., Class B		61,427		761,695
MillerKnoll, Inc.		129,923		2,656,925
Pitney Bowes, Inc.		200,937		781,645
Steelcase, Inc., Class A		148,506		1,250,421
				8,627,201
Oil & Gas Producers — 0.4%
Civitas Resources, Inc.		125,989		8,610,088
Crescent Energy Co., Class A(b)		66,980		757,544
HighPeak Energy, Inc.(b)		12,414		285,522
Kosmos Energy Ltd.(a)		771,299		5,738,465
				15,391,619
Oil Well Equipment & Services — 1.1%
Bristow Group, Inc.(a)		40,051		897,142
Cactus, Inc., Class A		106,674		4,398,169
ChampionX Corp.		341,871		9,274,960
Dril-Quip, Inc.(a)		57,315		1,644,367
Helix Energy Solutions Group, Inc.(a)		244,435		1,891,927
Helmerich & Payne, Inc.		175,656		6,279,702
Liberty Energy, Inc., Class A		230,224		2,949,170
Nabors Industries Ltd.(a)		15,544		1,894,969
National Energy Services Reunited Corp.(a)		61,329		322,591
Newpark Resources, Inc.(a)		146,188		562,824

Security	Shares		Value
Oil Well Equipment & Services (continued)
NexTier Oilfield Solutions, Inc.(a)(b)		300,154	$	2,386,224
Oceaneering International, Inc.(a)		170,740		3,010,146
Oil States International, Inc.(a)		107,822		898,157
Patterson-UTI Energy, Inc.		366,385		4,286,705
ProPetro Holding Corp.(a)		150,612		1,082,900
RPC, Inc.		128,023		984,497
Select Energy Services, Inc., Class A		122,354		851,584
Solaris Oilfield Infrastructure, Inc., Class A		54,034		461,450
TETRA Technologies, Inc.(a)		216,533		573,813
				44,651,297
Oil, Gas & Consumable Fuels — 0.6%
Archrock, Inc.		231,283		2,259,635
Ardmore Shipping Corp.		69,935		1,039,934
DHT Holdings, Inc.		234,042		2,529,994
Dorian LPG Ltd.		52,698		1,050,798
Empire Petroleum Corp.(a)(b)		16,161		200,558
Excelerate Energy, Inc., Class A		31,644		700,598
FLEX LNG Ltd.(a)(b)		49,202		1,652,203
Frontline PLC		212,918		3,525,922
Gulfport Energy Corp.(a)(b)		18,738		1,499,040
Noble Corp. PLC(a)		143,991		5,683,325
ProFrac Holding Corp., Class A(a)		40,409		511,982
VAALCO Energy, Inc.		182,238		825,538
Vertex Energy, Inc.(a)(b)		92,726		916,133
				22,395,660
Oil: Crude Producers — 1.9%
Amplify Energy Corp.(a)(b)		61,136		420,004
Berry Corp.		131,115		1,029,253
California Resources Corp.		126,538		4,871,713
Callon Petroleum Co.(a)		84,649		2,830,663
Chord Energy Corp.		70,977		9,553,504
CNX Resources Corp.(a)		288,476		4,621,385
Comstock Resources, Inc.		157,285		1,697,105
CVR Energy, Inc.		50,487		1,654,964
Denbury, Inc.(a)		85,690		7,509,015
Earthstone Energy, Inc., Class A(a)(b)		75,432		981,370
Gevo, Inc.(a)(b)		342,688		527,740
Magnolia Oil & Gas Corp., Class A		298,822		6,538,225
Murphy Oil Corp.		252,044		9,320,587
Northern Oil & Gas, Inc.		113,436		3,442,783
ONE Gas, Inc.		91,887		7,280,207
Ranger Oil Corp., Class A		33,217		1,356,582
Riley Exploration Permian, Inc.		18,211		693,111
SandRidge Energy, Inc.(a)		33,568		483,715
SilverBow Resources, Inc.(a)(b)		20,233		462,324
SM Energy Co.		207,495		5,843,059
Talos Energy, Inc.(a)(b)		120,205		1,783,842
Tellurian, Inc.(a)(b)		872,393		1,073,043
Ur-Energy, Inc.(a)(b)		362,736		384,500
Vital Energy, Inc.(a)		28,507		1,298,209
W&T Offshore, Inc.(a)(b)		162,048		823,204
				76,480,107
Oil: Refining & Marketing — 0.4%
Clean Energy Fuels Corp.(a)(b)		290,109		1,264,875
Delek U.S. Holdings, Inc.		118,767		2,725,703
Par Pacific Holdings, Inc.(a)		83,603		2,441,208
PBF Energy, Inc., Class A		202,198		8,767,305
World Fuel Services Corp.		104,744		2,676,209
				17,875,300

14

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Paints & Coatings — 0.2%
Chase Corp.		12,800	$	1,340,544
HB Fuller Co.		91,934		6,292,882
Kronos Worldwide, Inc.		39,140		360,480
				7,993,906
Paper — 0.1%
Clearwater Paper Corp.(a)		28,290		945,452
Glatfelter Corp.		68,669		219,054
Mativ Holdings, Inc.		91,886		1,972,792
				3,137,298
Paper & Forest Products — 0.1%
Sylvamo Corp.		58,344		2,698,993
Personal Care — 0.6%
Beauty Health Co.(a)		149,780		1,891,721
BellRing Brands, Inc.(a)		228,344		7,763,696
Edgewell Personal Care Co.		88,218		3,742,208
Honest Co., Inc.(a)(b)		101,668		183,002
Nu Skin Enterprises, Inc., Class A		84,185		3,309,312
Sterling Check Corp.(a)(b)		41,654		464,442
Thorne HealthTech, Inc.(a)(b)		21,325		98,522
USANA Health Sciences, Inc.(a)		19,401		1,220,323
Veru, Inc.(a)(b)		103,445		119,996
WD-40 Co.		23,388		4,164,234
				22,957,456
Personal Products — 0.1%
Herbalife Nutrition Ltd.(a)(b)		167,492		2,696,621
Pharmaceuticals — 2.1%
ACADIA Pharmaceuticals, Inc.(a)		205,574		3,868,903
Aclaris Therapeutics, Inc.(a)		110,528		894,172
Alkermes PLC(a)		278,656		7,855,313
Amneal Pharmaceuticals, Inc.(a)		158,228		219,937
Amphastar Pharmaceuticals, Inc.(a)		65,638		2,461,425
Arrowhead Pharmaceuticals, Inc.(a)(b)		175,973		4,469,714
Atea Pharmaceuticals, Inc.(a)		134,315		449,955
Athira Pharma, Inc.(a)		48,613		121,532
Axonics, Inc.(a)		83,780		4,571,037
Axsome Therapeutics, Inc.(a)(b)		54,754		3,377,227
Cassava Sciences, Inc.(a)(b)		65,247		1,573,758
Chimerix, Inc.(a)		128,913		162,430
Corcept Therapeutics, Inc.(a)		147,967		3,204,965
DICE Therapeutics, Inc.(a)		60,480		1,732,752
Eagle Pharmaceuticals, Inc.(a)		17,753		503,653
Edgewise Therapeutics, Inc.(a)		63,829		425,739
Enanta Pharmaceuticals, Inc.(a)		34,031		1,376,214
Esperion Therapeutics, Inc.(a)		119,831		190,531
Evolus, Inc.(a)(b)		60,680		513,353
Harmony Biosciences Holdings, Inc.(a)(b)		44,997		1,469,152
Heska Corp.(a)		16,507		1,611,413
Innoviva, Inc.(a)		109,641		1,233,461
Intra-Cellular Therapies, Inc.(a)		156,453		8,471,930
Ironwood Pharmaceuticals, Inc.(a)(b)		234,596		2,467,950
Liquidia Corp.(a)		81,251		561,444
Nektar Therapeutics(a)		291,165		204,660
Nuvation Bio, Inc.(a)		203,302		337,481
Pacira BioSciences, Inc.(a)		77,007		3,142,656
PetIQ, Inc.(a)		47,188		539,831
Prestige Consumer Healthcare, Inc.(a)		85,283		5,341,274
Reata Pharmaceuticals, Inc., Class A(a)		47,239		4,294,970
Revance Therapeutics, Inc.(a)(b)		137,870		4,440,793

Security	Shares		Value
Pharmaceuticals (continued)
Scilex Holding Lock Up, (Acquired 01/06/23, Cost: $1,040,392)(d)		99,274	$	804,776
SIGA Technologies, Inc.		81,168		466,716
Supernus Pharmaceuticals, Inc.(a)		84,683		3,068,065
Syndax Pharmaceuticals, Inc.(a)		102,980		2,174,938
Tarsus Pharmaceuticals, Inc.(a)		30,297		380,833
TG Therapeutics, Inc.(a)(b)		227,591		3,422,969
Theravance Biopharma, Inc.(a)		112,131		1,216,621
Theseus Pharmaceuticals, Inc.(a)		27,407		243,374
Third Harmonic Bio, Inc.(a)(b)		17,626		72,619
Ventyx Biosciences, Inc.(a)(b)		42,661		1,429,143
Xeris Biopharma Holdings, Inc.(a)		231,079		376,659
				85,746,338
Photography — 0.0%
GoPro, Inc., Class A(a)		224,498		1,129,225
Power Transmission Equipment — 0.2%
Advanced Energy Industries, Inc.		64,063		6,278,174
Babcock & Wilcox Enterprises, Inc.(a)		105,452		639,039
Cepton, Inc.(a)(b)		78,507		36,459
Powell Industries, Inc.		15,399		655,843
Vicor Corp.(a)		37,705		1,769,873
				9,379,388
Printing & Copying Services(a) — 0.2%
Casella Waste Systems, Inc., Class A		84,424		6,978,488
Cimpress PLC(b)		30,104		1,319,157
				8,297,645
Producer Durables: Miscellaneous(a) — 0.0%
First Advantage Corp.(b)		100,275		1,399,839
Solo Brands, Inc., Class A		38,288		274,908
				1,674,747
Production Technology Equipment(a) — 0.7%
ACM Research, Inc., Class A		82,089		960,441
Axcelis Technologies, Inc.		55,804		7,435,883
Cohu, Inc.(b)		80,367		3,085,289
HireRight Holdings Corp.(b)		36,445		386,681
Ichor Holdings Ltd.		47,938		1,569,490
Onto Innovation, Inc.		84,552		7,430,430
Photronics, Inc.		102,553		1,700,329
Ultra Clean Holdings, Inc.		77,219		2,560,582
Veeco Instruments, Inc.(b)		87,129		1,841,036
				26,970,161
Professional Services(a) — 0.2%
Alight, Inc., Class A		657,366		6,054,341
Legalzoom.com, Inc.(b)		163,724		1,535,731
Planet Labs PBC		332,238		1,305,696
Skillsoft Corp.		144,979		289,958
Spire Global, Inc.(b)		193,228		129,076
				9,314,802
Publishing — 0.1%
Daily Journal Corp.(a)		2,002		570,490
Gannett Co., Inc.(a)		236,046		441,406
John Wiley & Sons, Inc., Class A		73,575		2,852,503
Scholastic Corp.		50,213		1,718,289
				5,582,688
Radio & TV Broadcasters — 0.3%
Cumulus Media, Inc., Class A(a)(b)		28,553		105,361
Entravision Communications Corp., Class A		101,719		615,400
Gray Television, Inc.		140,437		1,224,611

SERIES  SCHEDULE  OF  INVESTMENTS 15

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Radio & TV Broadcasters (continued)
iHeartMedia, Inc., Class A(a)(b)		205,749	$	802,421
Liberty Media Corp.-Liberty Braves, Class A(a)(b)		17,044		589,381
Liberty Media Corp.-Liberty Braves, Class C(a)		64,119		2,160,169
Sinclair Broadcast Group, Inc., Class A		69,017		1,184,332
TEGNA, Inc.		381,245		6,446,853
				13,128,528
Railroad Equipment — 0.1%
Greenbrier Cos., Inc.		54,435		1,751,174
Trinity Industries, Inc.		139,516		3,398,610
				5,149,784
Real Estate — 0.4%
Anywhere Real Estate, Inc.(a)		183,636		969,598
Cushman & Wakefield PLC(a)(b)		250,850		2,643,959
eXp World Holdings, Inc.		119,163		1,512,179
Kennedy-Wilson Holdings, Inc.		201,443		3,341,939
Newmark Group, Inc., Class A		228,702		1,619,210
Redfin Corp.(a)		181,669		1,645,921
RMR Group, Inc., Class A		25,619		672,243
St. Joe Co.(b)		58,186		2,421,119
Stratus Properties, Inc.		9,109		182,180
Tejon Ranch Co.(a)		34,741		634,718
				15,643,066
Real Estate Investment Trusts (REITs) — 6.2%
Acadia Realty Trust		141,868		1,979,059
AFC Gamma, Inc.		28,328		344,468
Agree Realty Corp.		146,123		10,025,499
Alexander & Baldwin, Inc.		119,596		2,261,560
Alexander’s, Inc.		3,572		692,075
American Assets Trust, Inc.		84,349		1,568,048
Angel Oak Mortgage REIT, Inc.		18,499		135,043
Apartment Investment & Management Co., Class A		255,491		1,964,726
Apollo Commercial Real Estate Finance, Inc.		239,047		2,225,528
Apple Hospitality REIT, Inc.		359,883		5,585,384
Arbor Realty Trust, Inc.		282,112		3,241,467
Ares Commercial Real Estate Corp.		87,250		793,102
Armada Hoffler Properties, Inc.		112,862		1,332,900
ARMOUR Residential REIT, Inc.		280,051		1,470,268
Ashford Hospitality Trust, Inc.(a)(b)		53,148		170,605
Blackstone Mortgage Trust, Inc., Class A		293,944		5,246,900
Bluerock Homes Trust, Inc.(a)		5,708		113,133
Braemar Hotels & Resorts, Inc.		106,168		409,808
Brandywine Realty Trust		289,931		1,371,374
BrightSpire Capital, Inc.		158,173		933,221
Broadmark Realty Capital, Inc.		222,762		1,046,981
Broadstone Net Lease, Inc.		290,501		4,941,422
BRT Apartments Corp.		21,700		427,924
CareTrust REIT, Inc.		162,239		3,176,640
CBL & Associates Properties, Inc.		45,309		1,161,723
Centerspace		25,317		1,383,068
Chatham Lodging Trust		75,637		793,432
Chicago Atlantic Real Estate Finance, Inc.		8,586		115,997
Chimera Investment Corp.		395,769		2,232,137
City Office REIT, Inc.		65,402		451,274
Claros Mortgage Trust, Inc.		155,368		1,810,037
Clipper Realty, Inc.		23,302		133,753
Community Healthcare Trust, Inc.		41,166		1,506,676
CoreCivic, Inc.(a)		195,254		1,796,337
Corporate Office Properties Trust		191,845		4,548,645
CTO Realty Growth, Inc.		36,714		633,684
DiamondRock Hospitality Co.		353,776		2,876,199

Security	Shares		Value
Real Estate Investment Trusts (REITs) (continued)
Diversified Healthcare Trust		403,867	$	545,220
Dynex Capital, Inc.		90,182		1,093,006
Easterly Government Properties, Inc.		152,887		2,100,667
Ellington Financial, Inc.		108,404		1,323,613
Elme Communities		149,330		2,667,034
Empire State Realty Trust, Inc., Class A(b)		227,261		1,474,924
Equity Commonwealth		179,946		3,726,682
Essential Properties Realty Trust, Inc.		232,925		5,788,186
Farmland Partners, Inc.		86,576		926,363
Four Corners Property Trust, Inc.		139,663		3,751,348
Franklin BSP Realty Trust, Inc.		140,803		1,679,780
Franklin Street Properties Corp.		158,095		248,209
GEO Group, Inc.(a)		202,557		1,598,175
Getty Realty Corp.		63,224		2,277,961
Gladstone Commercial Corp.		67,182		848,509
Gladstone Land Corp.		55,525		924,491
Global Medical REIT, Inc.		103,624		944,015
Global Net Lease, Inc.		175,694		2,259,425
Granite Point Mortgage Trust, Inc.		92,384		458,225
Hannon Armstrong Sustainable Infrastructure Capital, Inc.		148,703		4,252,906
Hersha Hospitality Trust, Class A		54,515		366,341
Independence Realty Trust, Inc.		379,577		6,084,619
Indus Realty Trust, Inc.		9,645		639,367
Industrial Logistics Properties Trust		112,549		345,525
Innovative Industrial Properties, Inc.		47,493		3,608,993
InvenTrust Properties Corp.		112,102		2,623,187
Invesco Mortgage Capital, Inc.		61,797		685,329
iStar, Inc.		62,971		1,849,452
Kite Realty Group Trust		363,485		7,604,106
KKR Real Estate Finance Trust, Inc.		97,308		1,108,338
Ladder Capital Corp.		192,993		1,823,784
LTC Properties, Inc.		67,792		2,381,533
LXP Industrial Trust		457,748		4,719,382
MFA Financial, Inc.		175,882		1,744,749
National Health Investors, Inc.		69,301		3,574,546
Necessity Retail REIT, Inc.		220,083		1,382,121
New York Mortgage Trust, Inc.(b)		157,704		1,570,732
Nexpoint Real Estate Finance, Inc.		12,113		189,811
NexPoint Residential Trust, Inc.		37,736		1,647,931
Office Properties Income Trust		81,669		1,004,529
One Liberty Properties, Inc.		27,291		625,783
Orchid Island Capital, Inc.		64,996		697,407
Orion Office REIT, Inc.		98,804		661,987
Outfront Media, Inc.		247,938		4,024,034
Paramount Group, Inc.		321,463		1,465,871
Pebblebrook Hotel Trust		206,774		2,903,107
PennyMac Mortgage Investment Trust		152,321		1,878,118
Phillips Edison & Co., Inc.		195,569		6,379,461
Physicians Realty Trust		381,789		5,700,110
Piedmont Office Realty Trust, Inc., Class A		209,920		1,532,416
Plymouth Industrial REIT, Inc.		64,345		1,351,888
Postal Realty Trust, Inc., Class A		30,548		464,941
PotlatchDeltic Corp.		135,820		6,723,090
Ready Capital Corp.		122,697		1,247,828
Redwood Trust, Inc.		193,624		1,305,026
Retail Opportunity Investments Corp.		208,493		2,910,562
RLJ Lodging Trust		269,607		2,857,834
RPT Realty		140,789		1,338,903
Sabra Health Care REIT, Inc.		388,292		4,465,358
Saul Centers, Inc.		19,935		777,465
Service Properties Trust		275,237		2,741,360

16

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Real Estate Investment Trusts (REITs) (continued)
STAG Industrial, Inc.		303,077	$	10,250,064
Star Holdings		19,462		338,444
Summit Hotel Properties, Inc.		174,609		1,222,263
Sunstone Hotel Investors, Inc.		357,775		3,534,817
Tanger Factory Outlet Centers, Inc.		173,327		3,402,409
Terreno Realty Corp.		133,930		8,651,878
TPG RE Finance Trust, Inc.		115,692		839,924
Two Harbors Investment Corp.		166,196		2,444,743
UMH Properties, Inc.		90,769		1,342,473
Uniti Group, Inc.		405,401		1,439,173
Universal Health Realty Income Trust		21,817		1,049,616
Urban Edge Properties		196,172		2,954,350
Urstadt Biddle Properties, Inc., Class A		49,110		862,863
Veris Residential, Inc.(a)		144,007		2,108,262
Whitestone REIT		80,630		741,796
Xenia Hotels & Resorts, Inc.		187,088		2,448,982
				250,427,817
Real Estate Management & Development — 0.2%
American Realty Investors, Inc.(a)		2,389		62,878
Bluegreen Vacations Holding Corp.		16,876		462,065
Compass, Inc., Class A(a)(b)		472,592		1,526,472
DigitalBridge Group, Inc.		270,050		3,237,900
Doma Holdings, Inc.(a)		211,562		86,212
Forestar Group, Inc.(a)		31,038		482,951
Offerpad Solutions, Inc.(a)(b)		105,470		55,583
Transcontinental Realty Investors, Inc.(a)		1,939		82,194
				5,996,255
Recreational Vehicles & Boats — 0.3%
Camping World Holdings, Inc., Class A		66,911		1,396,433
LCI Industries		42,324		4,650,138
Malibu Boats, Inc., Class A(a)		34,786		1,963,670
Marine Products Corp.		12,431		163,965
MasterCraft Boat Holdings, Inc.(a)(b)		30,308		922,272
Winnebago Industries, Inc.		51,045		2,945,296
				12,041,774
Rental & Leasing Services: Consumer — 0.1%
Upbound Group, Inc., Class A		85,346		2,091,830
Restaurants — 1.4%
Biglari Holdings, Inc., Class B(a)		1,350		228,420
BJ’s Restaurants, Inc.(a)		38,843		1,131,885
Bloomin’ Brands, Inc.		149,272		3,828,827
Brinker International, Inc.(a)		74,290		2,823,020
Cheesecake Factory, Inc.		82,885		2,905,119
Cracker Barrel Old Country Store, Inc.		37,821		4,296,466
Dave & Buster’s Entertainment, Inc.(a)		73,512		2,704,506
Denny’s Corp.(a)		95,089		1,061,193
Dine Brands Global, Inc.		25,335		1,713,659
El Pollo Loco Holdings, Inc.		35,392		339,409
Jack in the Box, Inc.		35,456		3,105,591
Kura Sushi USA, Inc., Class A(a)		8,178		538,440
Noodles & Co.(a)		67,772		328,694
ONE Group Hospitality, Inc.(a)		38,498		311,834
Papa John’s International, Inc.		55,695		4,173,226
Rush Street Interactive, Inc.(a)(b)		106,716		331,887
Ruth’s Hospitality Group, Inc.		54,438		893,872
Shake Shack, Inc., Class A(a)		64,191		3,561,959
Sweetgreen, Inc., Class A(a)		151,775		1,189,916

Security	Shares		Value
Restaurants (continued)
Texas Roadhouse, Inc.		114,383	$	12,360,227
Wingstop, Inc.(b)		51,195		9,398,378
				57,226,528
Road & Rail(a)(b) — 0.0%
Bird Global, Inc., Class A		264,846		74,131
TuSimple Holdings, Inc., Class A		239,143		351,540
				425,671
Scientific Instruments: Control & Filter — 0.8%
Arlo Technologies, Inc.(a)		148,203		898,110
Brady Corp., Class A		75,993		4,083,104
CIRCOR International, Inc.(a)		31,550		981,836
Energy Recovery, Inc.(a)(b)		94,024		2,167,253
ESCO Technologies, Inc.		44,086		4,208,009
Gorman-Rupp Co.		38,678		966,950
Helios Technologies, Inc.(b)		55,614		3,637,155
Napco Security Technologies, Inc.(a)		53,864		2,024,209
Resideo Technologies, Inc.(a)		242,978		4,441,638
Thermon Group Holdings, Inc.(a)		56,729		1,413,687
Watts Water Technologies, Inc., Class A		45,750		7,700,640
				32,522,591
Scientific Instruments: Electrical — 0.7%
Allied Motion Technologies, Inc.		22,280		861,122
Atkore, Inc.(a)		67,303		9,454,725
AZZ, Inc.		41,011		1,691,294
EnerSys		69,058		5,999,759
Franklin Electric Co., Inc.		78,034		7,342,999
FTC Solar, Inc.(a)(b)		67,315		151,459
Preformed Line Products Co.		4,387		561,712
				26,063,070
Scientific Instruments: Gauges & Meters — 0.4%
Badger Meter, Inc.		48,277		5,881,104
FARO Technologies, Inc.(a)		32,362		796,429
Itron, Inc.(a)		77,060		4,272,977
Mesa Laboratories, Inc.(b)		8,722		1,523,995
Transcat, Inc.(a)		12,115		1,082,960
Vishay Precision Group, Inc.(a)		21,482		897,088
				14,454,553
Scientific Instruments: Pollution Control(a) — 0.3%
Evoqua Water Technologies Corp.		201,181		10,002,719
Heritage-Crystal Clean, Inc.		26,806		954,562
				10,957,281
Securities Brokerage & Services — 0.1%
BGC Partners, Inc., Class A		537,825		2,812,825
StoneX Group, Inc.(a)		29,944		3,100,102
				5,912,927
Semiconductors & Components — 1.9%
Alpha & Omega Semiconductor Ltd.(a)		37,842		1,019,842
Amkor Technology, Inc.		173,405		4,511,998
Atomera, Inc.(a)(b)		32,540		207,280
AXT, Inc.(a)		67,242		267,623
CEVA, Inc.(a)		38,606		1,174,780
Diodes, Inc.(a)		75,821		7,033,156
FormFactor, Inc.(a)		131,695		4,194,486
Kulicke & Soffa Industries, Inc.		95,216		5,016,931
MACOM Technology Solutions Holdings, Inc., Class H(a)		92,518		6,553,975
MaxLinear, Inc.(a)		124,208		4,373,364
Power Integrations, Inc.		96,788		8,192,136

SERIES  SCHEDULE  OF  INVESTMENTS 17

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Semiconductors & Components (continued)
Rambus, Inc.(a)		182,540	$	9,357,000
Semtech Corp.(a)(b)		108,112		2,609,824
Silicon Laboratories, Inc.(a)		54,078		9,468,517
SiTime Corp.(a)(b)		27,696		3,939,202
SkyWater Technology, Inc.(a)		20,970		238,639
SMART Global Holdings, Inc.(a)		83,289		1,435,902
Vishay Intertechnology, Inc.		220,153		4,979,861
				74,574,516
Semiconductors & Semiconductor Equipment(a) — 0.2%
Ambarella, Inc.		63,359		4,905,254
Credo Technology Group Holding Ltd.(b)		167,078		1,573,875
indie Semiconductor, Inc., Class A		182,498		1,925,354
Rigetti Computing, Inc.		121,158		87,646
Transphorm, Inc.		33,131		132,192
				8,624,321
Shipping — 0.8%
A-Mark Precious Metals, Inc.		31,324		1,085,377
Eagle Bulk Shipping, Inc.		22,963		1,044,817
Eneti, Inc.		39,314		367,586
Genco Shipping & Trading Ltd.		62,867		984,497
Golar LNG Ltd.(a)		172,428		3,724,445
International Seaways, Inc.		83,174		3,466,692
Matson, Inc.		63,872		3,811,242
Nordic American Tankers Ltd.		350,564		1,388,233
Safe Bulkers, Inc.		123,751		456,641
Scorpio Tankers, Inc.		80,378		4,526,085
SFL Corp. Ltd.		196,186		1,863,767
SITE Centers Corp.		329,158		4,042,060
Teekay Corp.(a)(b)		118,057		729,592
Teekay Tankers Ltd., Class A(a)		39,063		1,676,975
Tidewater, Inc.(a)		79,585		3,508,107
				32,676,116
Software — 0.9%
Amplitude, Inc., Class A(a)		95,862		1,192,523
Arteris, Inc.(a)		26,145		110,593
AvePoint, Inc.(a)(b)		214,519		883,818
AvidXchange Holdings, Inc.(a)		250,947		1,957,387
Blend Labs, Inc., Class A(a)		311,756		310,571
C3.ai, Inc., Class A(a)(b)		101,871		3,419,810
Cipher Mining, Inc.(a)(b)		60,361		140,641
Clear Secure, Inc., Class A		110,314		2,886,917
Consensus Cloud Solutions, Inc.(a)		32,096		1,094,153
Couchbase, Inc.(a)(b)		48,351		679,815
CS Disco, Inc.(a)		40,490		268,854
Cvent Holding Corp.(a)(b)		78,856		659,236
Enfusion, Inc., Class A(a)		46,318		486,339
EngageSmart, Inc.(a)		61,091		1,176,002
EverCommerce, Inc.(a)		39,680		419,814
ForgeRock, Inc., Class A(a)(b)		75,030		1,545,618
Greenidge Generation Holdings, Inc.(a)		14,396		6,507
Instructure Holdings, Inc.(a)(b)		29,405		761,590
Intapp, Inc.(a)(b)		24,944		1,118,489
IronNet, Inc.(a)		100,143		35,210
Kaleyra, Inc.(b)		13,014		21,473
Latch, Inc.(a)		169,067		128,846
MarketWise, Inc.(a)		26,299		48,653
MeridianLink, Inc.(a)(b)		39,290		679,717
Model N, Inc.(a)		63,986		2,141,611
N-able, Inc.(a)		116,274		1,534,817
NextNav, Inc.(a)(b)		107,065		217,342

Security	Shares		Value
Software (continued)
Olo, Inc., Class A(a)(b)		153,586	$	1,253,262
Qualys, Inc.(a)(b)		65,887		8,566,628
Terawulf, Inc.(a)		97,106		91,066
Weave Communications, Inc.(a)		54,324		269,990
Zeta Global Holdings Corp., Class A(a)(b)		189,596		2,053,325
				36,160,617
Specialty Retail — 2.2%
1-800-Flowers.com, Inc., Class A(a)		44,520		511,980
Aaron’s Co., Inc.		51,736		499,770
Abercrombie & Fitch Co., Class A(a)		83,342		2,312,741
Academy Sports & Outdoors, Inc.		129,763		8,467,036
Alta Equipment Group, Inc.		35,632		564,767
American Eagle Outfitters, Inc.		263,849		3,546,131
America’s Car-Mart, Inc.(a)		10,057		796,615
Arko Corp.		141,756		1,203,508
Asbury Automotive Group, Inc.(a)(b)		37,821		7,942,410
Bed Bath & Beyond, Inc.(a)(b)		128,500		54,921
Big 5 Sporting Goods Corp.(b)		34,568		265,828
Blink Charging Co.(a)(b)		72,854		630,187
Boot Barn Holdings, Inc.(a)		50,463		3,867,484
Buckle, Inc.		51,856		1,850,741
Build-A-Bear Workshop, Inc.		23,616		548,836
Caleres, Inc.		58,461		1,264,511
Cato Corp., Class A		28,029		247,776
Chico’s FAS, Inc.(a)		209,146		1,150,303
Children’s Place, Inc.(a)		20,469		823,877
Citi Trends, Inc.(a)		14,473		275,276
Conn’s, Inc.(a)		22,927		138,938
Container Store Group, Inc.(a)		51,861		177,883
Designer Brands, Inc., Class A		86,923		759,707
Destination XL Group, Inc.(a)		99,585		548,713
EVgo, Inc.(a)(b)		116,160		904,886
Express, Inc.(a)(b)		99,247		78,236
Foot Locker, Inc.		137,858		5,471,584
Genesco, Inc.(a)(b)		20,906		771,013
Group 1 Automotive, Inc.(b)		24,056		5,446,760
Guess?, Inc.		53,653		1,044,087
Haverty Furniture Cos., Inc.		24,998		797,686
Hibbett, Inc.		21,747		1,282,638
JOANN, Inc.		17,579		27,951
Lands’ End, Inc.(a)		26,544		258,008
LL Flooring Holdings, Inc.(a)		54,050		205,390
MarineMax, Inc.(a)		36,865		1,059,869
Monro, Inc.		53,415		2,640,303
Murphy USA, Inc.(b)		34,379		8,871,501
National Vision Holdings, Inc.(a)(b)		134,148		2,527,348
ODP Corp.(a)		68,469		3,079,736
OneWater Marine, Inc., Class A(a)		19,418		543,121
RealReal, Inc.(a)(b)		137,039		172,669
Sally Beauty Holdings, Inc.(a)		183,128		2,853,134
Shoe Carnival, Inc.		29,309		751,776
Sonic Automotive, Inc., Class A		30,752		1,671,064
Sportsman’s Warehouse Holdings, Inc.(a)		64,092		543,500
Tilly’s, Inc., Class A(a)		36,062		278,038
Torrid Holdings, Inc.(a)(b)		19,872		86,642
TravelCenters of America, Inc.(a)		21,631		1,871,082
Urban Outfitters, Inc.(a)		109,373		3,031,820
Warby Parker, Inc., Class A(a)(b)		142,961		1,513,957
Zumiez, Inc.(a)		27,797		512,577
				86,746,315

18

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Steel — 0.4%
ATI, Inc.(a)(b)		211,981	$	8,364,770
Carpenter Technology Corp.		81,625		3,653,535
Ivanhoe Electric, Inc.(a)		78,909		958,744
Olympic Steel, Inc.		16,319		852,015
Ryerson Holding Corp.		33,236		1,209,126
Schnitzer Steel Industries, Inc., Class A		42,311		1,315,872
TimkenSteel Corp.(a)		75,704		1,388,412
				17,742,474
Technology Hardware & Equipment — 0.1%
CompoSecure, Inc.(a)		12,055		88,725
IonQ, Inc.(a)(b)		205,815		1,265,762
Xerox Holdings Corp.		195,633		3,012,748
				4,367,235
Technology: Miscellaneous — 0.4%
Aeva Technologies, Inc.(a)		161,674		192,392
Benchmark Electronics, Inc.		59,929		1,419,718
CTS Corp.		54,345		2,687,904
Fabrinet(a)		63,113		7,495,300
Kimball Electronics, Inc.(a)		39,226		945,346
Plexus Corp.(a)		46,298		4,517,296
				17,257,956
Telecommunications Equipment(a) — 0.2%
Akoustis Technologies, Inc.(b)		107,663		331,602
Cambium Networks Corp.		20,578		364,642
Clearfield, Inc.		21,959		1,022,850
Knowles Corp.		153,667		2,612,339
Viavi Solutions, Inc.		384,962		4,169,139
				8,500,572
Textile Products — 0.0%
Interface, Inc.		98,178		797,205
Unifi, Inc.(a)(b)		26,240		214,381
				1,011,586
Textiles Apparel & Shoes — 0.7%
Crocs, Inc.(a)		103,628		13,102,724
Fossil Group, Inc.(a)		75,434		241,389
G-III Apparel Group Ltd.(a)		73,782		1,147,310
Kontoor Brands, Inc.		94,801		4,587,420
Oxford Industries, Inc.		25,545		2,697,297
PLBY Group, Inc.(a)(b)		68,478		135,587
Rocky Brands, Inc.		11,548		266,412
Steven Madden Ltd.		131,822		4,745,592
Superior Group of Cos., Inc.		17,077		134,396
Weyco Group, Inc.		9,117		230,660
Wolverine World Wide, Inc.		132,313		2,255,937
				29,544,724
Textiles, Apparel & Luxury Goods — 0.0%
Allbirds, Inc., Class A(a)		152,870		183,444
Ermenegildo Zegna NV		101,660		1,386,642
				1,570,086
Toys — 0.0%
Funko, Inc., Class A(a)		55,137		519,942
Trading Companies & Distributors — 0.0%
Hudson Technologies, Inc.(a)		75,050		655,187
Transportation Miscellaneous — 0.2%
Costamare, Inc.		90,495		851,558

Security	Shares		Value
Transportation Miscellaneous (continued)
Hub Group, Inc., Class A(a)		54,689	$	4,590,595
Textainer Group Holdings Ltd.		74,350		2,387,378
				7,829,531
Truckers — 0.8%
ArcBest Corp.		41,301		3,817,038
Covenant Logistics Group, Inc.		16,169		572,706
Daseke, Inc.(a)		67,766		523,831
Forward Air Corp.		45,744		4,929,373
FRP Holdings, Inc.(a)		11,405		660,121
Heartland Express, Inc.		79,835		1,270,973
Marten Transport Ltd.		98,168		2,056,620
PAM Transportation Services, Inc.(a)		11,651		333,568
Saia, Inc.(a)(b)		45,343		12,336,924
Universal Logistics Holdings, Inc.		12,866		375,044
Werner Enterprises, Inc.		108,101		4,917,515
				31,793,713
Utilities: Electrical — 1.4%
ALLETE, Inc.		95,647		6,156,797
Avista Corp.		110,092		4,673,405
Black Hills Corp.		111,145		7,013,250
Clearway Energy, Inc., Class A		57,044		1,713,031
Clearway Energy, Inc., Class C		142,456		4,463,147
MGE Energy, Inc.		60,944		4,733,521
NorthWestern Corp.		99,028		5,729,760
Otter Tail Corp.		70,220		5,074,799
PNM Resources, Inc.		146,988		7,155,376
Portland General Electric Co.		152,645		7,462,814
Unitil Corp.		27,067		1,543,902
Via Renewables, Inc.(b)		3,761		69,127
				55,788,929
Utilities: Gas Distributors — 0.7%
Chesapeake Utilities Corp.		26,238		3,358,202
New Jersey Resources Corp.		160,033		8,513,755
Northwest Natural Holding Co.		59,500		2,829,820
Southwest Gas Holdings, Inc.		114,477		7,149,089
Spire, Inc.		87,033		6,104,495
				27,955,361
Utilities: Miscellaneous — 0.4%
Brookfield Infrastructure Corp., Class A		162,300		7,475,538
Ormat Technologies, Inc.		89,429		7,580,896
				15,056,434
Utilities: Telecommunications — 0.9%
8x8, Inc.(a)(b)		189,541		790,386
ATN International, Inc.		18,527		758,125
Cogent Communications Holdings, Inc.		73,724		4,697,693
Consolidated Communications Holdings, Inc.(a)		132,877		342,823
Globalstar, Inc.(a)(b)		1,123,573		1,303,345
IDT Corp., Class B(a)		26,610		906,869
Iridium Communications, Inc.		213,626		13,229,858
LiveVox Holdings, Inc.(a)		36,149		111,700
Radius Global Infrastructure, Inc., Class A(a)(b)		131,507		1,929,208
Shenandoah Telecommunications Co.		82,181		1,563,083
Telephone & Data Systems, Inc.		172,773		1,815,844
U.S. Cellular Corp.(a)		25,457		527,723
Xperi, Inc.(a)		70,417		769,658
Ziff Davis, Inc.(a)(b)		78,023		6,089,695
				34,836,010
Utilities: Water — 0.5%
American States Water Co.		63,154		5,613,759

SERIES  SCHEDULE  OF  INVESTMENTS 19

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Utilities: Water (continued)
Artesian Resources Corp., Class A		13,596	$	752,675
California Water Service Group		90,689		5,278,100
Global Water Resources, Inc.		22,439		278,917
Middlesex Water Co.		26,037		2,034,010
Pure Cycle Corp.(a)		33,265		314,354
SJW Group		46,200		3,517,206
York Water Co.		23,476		1,049,377
				18,838,398
Wireless Telecommunication Services — 0.0%
KORE Group Holdings, Inc.(a)(b)		54,213		66,140
Total Common Stocks — 97.6% (Cost: $3,485,273,979)				3,916,658,340
Investment Companies
Equity Funds — 1.2%
iShares Russell 2000 ETF(b)(e)		259,876		46,361,878
Total Investment Companies — 1.2% (Cost: $44,772,922)				46,361,878
Rights
Biotechnology(c) — 0.0%
Aduro Biotech, Inc.		21,953		55,738
Gtx, Inc.(b)		944		968
				56,706
Metals & Mining — 0.0%
PolyMet Mining Corp., (Expires 04/10/23, Strike Price USD(b)		49,605		134
Total Rights — 0.0% (Cost: $1,935)				56,840
Total Long-Term Investments — 98.8% (Cost: $3,530,048,836)				3,963,077,058

Security	Shares		Value
Short-Term Securities
Money Market Funds — 8.6%
BlackRock Cash Funds: Institutional, SL Agency Shares, 5.01%(e)(f)(g)		290,970,825	$	291,058,116
BlackRock Cash Funds: Treasury, SL Agency Shares, 4.73%(e)(f)		55,659,069		55,659,069
Total Short-Term Securities — 8.6% (Cost: $346,555,126)				346,717,185
Total Investments — 107.4% (Cost: $3,876,603,962)				4,309,794,243
Liabilities in Excess of Other Assets — (7.4)%				(297,548,216	)
Net Assets — 100.0%			$	4,012,246,027

^(a)  Non-income producing security.

^(b)  All or a portion of this security is on loan.

^(c)  Security is valued using significant unobservable inputs and is classified as Level 3 in the fair value hierarchy.

^(d)  Restricted security as to resale, excluding 144A securities. The Series held restricted securities with a current value of $804,776, representing less than 0.05% of its net assets as of period end, and an original cost of $1,040,392.

^(e)  Affiliate of the Series.

^(f)  Annualized 7-day yield as of period end.

^(g)  All or a portion of this security was purchased with the cash collateral from loaned securities.

For Series compliance purposes, the Series’s industry classifications refer to one or more of the industry sub-classifications used by one or more widely recognized market indexes or rating group indexes, and/or as defined by the investment adviser. These definitions may not apply for purposes of this report, which may combine such industry sub-classifications for reporting ease.

Affiliates

Investments in issuers considered to be affiliate(s) of the Series during the period ended March 31, 2023 for purposes of Section 2(a)(3) of the Investment Company Act of 1940, as amended, were as follows:

Affiliated Issuer	Value at 12/31/22		Purchases at Cost			Proceeds from Sales			Net Realized Gain (Loss)		Change in Unrealized Appreciation (Depreciation)			Value at 03/31/23		Shares Held at 03/31/23		Income			Capital Gain Distributions from Underlying Funds
BlackRock Cash Funds: Institutional, SL Agency Shares	$	319,335,055	$	—		$	(28,286,173	)(a)	$	12,470	$	(3,236	)	$	291,058,116		290,970,825	$	1,360,630	(b)	$	—
BlackRock Cash Funds: Treasury, SL Agency Shares		34,903,521		20,755,548	(a)		—			—		—			55,659,069		55,659,069		368,606			—
iShares Russell 2000 ETF		34,305,853		102,771,305			(92,621,096	)		1,113,168		792,648			46,361,878		259,876		101,336			—
									$	1,125,638	$	789,412		$	393,079,063			$	1,830,572		$	—

^(a)  Represents net amount purchased (sold).

^(b)  All or a portion represents securities lending income earned from the reinvestment of cash collateral from loaned securities, net of fees and collateral investment expenses, and other payments to and from borrowers of securities.

20

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series

Derivative Financial Instruments Outstanding as of Period End

Futures Contracts

Description	Number of Contracts		Expiration Date		Notional Amount (000)		Value/ Unrealized Appreciation (Depreciation)
Long Contracts
Russell 2000 E-Mini Index		240		06/16/23	$	21,762	$	704,382

OTC Total Return Swaps

Reference Entity	Payment Frequency	Counterparty(a)	Termination Date		Net Notional		Accrued Unrealized Appreciation (Depreciation)			Net Value of Reference Entity		Gross Notional Amount Net Asset Percentage
Equity Securities Long	Monthly	Goldman Sachs Bank USA(b)		08/19/26	$	5,808,422	$	(73,443	)(c)	$	5,728,347		0.1	%
	Monthly	HSBC Bank USA N.A.(d)		02/10/28		8,071,576		(468,731	)(e)		7,599,788		0.2
	Monthly	JPMorgan Chase Bank N.A.(f)		02/08/24		10,734,495		(768,884	)(g)		9,976,651		0.3
							$	(1,311,058	)	$	23,304,786

^(a)  The Series receives the total return on a portfolio of long positions underlying the total return swap. The Series pays the total return on a portfolio of short positions underlying the total return swap. In addition, the Series pays or receives a variable rate of interest, based on a specified benchmark. The benchmark and spread are determined based upon the country and/or currency of the individual underlying positions.

^(c)  Amount includes $6,632 of net dividends and financing fees.

^(e)  Amount includes $3,057 of net dividends and financing fees.

^(g)  Amount includes $(11,040) of net dividends and financing fees.

The following are the specified benchmarks (plus or minus a range) used in determining the variable rate of interest:

	(b)	(d)	(f)
Range:	40 basis points	40 basis points	40 basis points
Benchmarks:	USD - 1D Overnight Fed Funds Effective Rate (FEDL01)	USD - 1D Overnight Bank Funding Rate (OBFR01)	USD - 1D Overnight Bank Funding Rate (OBFR01)

The following table represents the individual long positions and related values of the equity securities underlying the total return swap with Goldman Sachs Bank USA as of period end, termination date on August 19, 2026:

Security	Shares		Value		% of Basket Value
Reference Entity — Long
Common Stocks
Banks: Diversified
Atlantic Union Bankshares Corp.		8,555	$	299,853		5.2	%
Cadence Bank		47,773		991,767		17.3
Central Pacific Financial Corp.		277		4,958		0.1
City Holding Co.		2,966		269,550		4.7
Community Bank System, Inc.		2,302		120,832		2.1
First Financial Bancorp		12,198		265,550		4.6
Hanmi Financial Corp.		3,913		72,664		1.3
Hope Bancorp, Inc.		15,558		152,780		2.7
Independent Bank Corp.		657		43,112		0.8
NBT Bancorp, Inc.		4,667		157,325		2.7
OFG Bancorp		8,657		215,906		3.8
Pacific Premier Bancorp, Inc.		1,697		40,762		0.7

Security	Shares		Value		% of Basket Value
Banks: Diversified (continued)
Simmons First National Corp., Class A		23,050	$	403,145		7.0	%
Trustmark Corp.		1,313		32,431		0.6
United Community Banks, Inc.		12,022		338,059		5.9
				3,408,694
Banks: Savings, Thrift & Mortgage Lending
Bankunited, Inc.		14,094		318,242		5.5
Berkshire Hills Bancorp, Inc.		10,665		267,265		4.7
HomeStreet, Inc.		2,872		51,667		0.9
Northwest Bancshares, Inc.		23,422		281,767		4.9
Washington Federal, Inc.		8,539		257,195		4.5
WSFS Financial Corp.		1,835		69,014		1.2
				1,245,150
Insurance: Property-Casualty
Genworth Financial, Inc., Class A		4,713		23,659		0.4
Stewart Information Services Corp.		5,459		220,271		3.9
				243,930

SERIES  SCHEDULE  OF  INVESTMENTS 21

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series

Security	Shares		Value		% of Basket Value
IT Services
Bread Financial Holdings, Inc.		5,432	$	164,698		2.9	%
Real Estate Investment Trusts (REITs)
Getty Realty Corp.		1,221		43,993		0.7
Pebblebrook Hotel Trust		16,213		227,630		4.0
				271,623
Utilities: Gas Distributors
Chesapeake Utilities Corp.		822		105,208		1.8
Utilities: Water
Middlesex Water Co.		3,700		289,044		5.1
Net Value of Reference Entity — Goldman Sachs Bank USA			$	5,728,347

The following table represents the individual long positions and related values of the equity securities underlying the total return swap with HSBC Bank PLC as of period end, termination date on February 10, 2028:

Security	Shares		Value		% of Basket Value
Reference Entity — Long
Common Stocks
Alternative Energy
Green Plains, Inc.		32,292	$	1,000,729		13.2	%
Banks: Diversified
Bancorp, Inc.		123		3,426		0.0
Banner Corp.		2,349		127,715		1.7
Community Bank System, Inc.		1,794		94,167		1.2
CVB Financial Corp.		1,788		29,824		0.4
First BanCorp./Puerto Rico		29,598		338,009		4.5
First Commonwealth Financial Corp.		33,938		421,849		5.6
First Financial Bancorp		5,542		120,649		1.6
Hope Bancorp, Inc.		21,940		215,451		2.8
Independent Bank Corp.		2,113		138,655		1.8
NBT Bancorp, Inc.		2,339		78,848		1.0
Pacific Premier Bancorp, Inc.		1,925		46,239		0.6
Preferred Bank/Los Angeles CA		10,314		565,310		7.4
Provident Financial Services, Inc.		15,387		295,123		3.9
Renasant Corp.		1,798		54,983		0.7
Simmons First National Corp., Class A		358		6,261		0.1
Trustmark Corp.		8,025		198,217		2.6
Veritex Holdings, Inc.		1,725		31,499		0.4
Westamerica BanCorp		5,253		232,708		3.1
				2,998,933
Banks: Savings, Thrift & Mortgage Lending
HomeStreet, Inc.		2,511		45,173		0.6
WSFS Financial Corp.		8,048		302,685		4.0
				347,858
Computer Services Software & Systems
Envestnet, Inc.		13,292		779,842		10.3
Financial Data & Systems
Green Dot Corp., Class A		9,051		155,496		2.0

Security	Shares		Value		% of Basket Value
Insurance: Multi-Line
James River Group Holdings Ltd.		13,875	$	286,519		3.8	%
Insurance: Property-Casualty
Genworth Financial, Inc., Class A		13,425		67,394		0.9
Radian Group, Inc.		18,310		404,651		5.3
Safety Insurance Group, Inc.		370		27,572		0.4
				499,617
Office Supplies & Equipment
Pitney Bowes, Inc.		93,534		363,847		4.8
Real Estate Investment Trusts (REITs)
Acadia Realty Trust		18,462		257,545		3.4
Getty Realty Corp.		7,944		286,222		3.7
				543,767
Utilities: Electrical
Avista Corp.		6,615		280,807		3.7
Utilities: Gas Distributors
Chesapeake Utilities Corp.		2,675		342,373		4.5
Net Value of Reference Entity — HSBC Bank PLC			$	7,599,788

The following table represents the individual long positions and related values of the equity securities underlying the total return swap with JPMorgan Chase Bank N.A. as of period end, termination date on February 8, 2024:

Security	Shares		Value		% of Basket Value
Reference Entity — Long
Common Stocks
Alternative Energy
Green Plains, Inc.		8,336	$	258,333		2.6	%
Asset Management & Custodian
Virtus Investment Partners, Inc.		805		153,264		1.5
Wisdomtree, Inc.		20,540		120,364		1.2
				273,628
Banks: Diversified
Bancorp, Inc.		13,639		379,846		3.8
Banner Corp.		3,772		205,084		2.1
Cadence Bank		23,454		486,905		4.9
Capitol Federal Financial, Inc.		12,638		85,054		0.8
Central Pacific Financial Corp.		10,005		179,089		1.8
Community Bank System, Inc.		6,811		357,509		3.6
Customers Bancorp, Inc.		3,705		68,617		0.7
CVB Financial Corp.		18,831		314,101		3.1
Eagle Bancorp, Inc.		7,055		236,131		2.4
First Bancorp/Southern Pines NC		6,230		221,290		2.2
Hanmi Financial Corp.		13,023		241,837		2.4
Independent Bank Corp.		8,612		565,119		5.7
National Bank Holdings Corp., Class A		4,571		152,946		1.5
Pacific Premier Bancorp, Inc.		24,332		584,455		5.9
Renasant Corp.		7,777		237,821		2.4
S&T Bancorp, Inc.		14,051		441,904		4.4
Southside Bancshares, Inc.		3,085		102,422		1.0
Triumph Financial, Inc.		3,926		227,943		2.3

22

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series

Security	Shares		Value		% of Basket Value
Banks: Diversified (continued)
TrustCo Bank Corp. NY		3,432	$	109,618		1.1	%
United Bankshares, Inc.		15,643		550,634		5.5
United Community Banks, Inc.		1,477		41,533		0.4
Veritex Holdings, Inc.		15,151		276,657		2.8
				6,066,515
Banks: Savings, Thrift & Mortgage Lending
Banc of California, Inc.		8,246		103,322		1.0
Brookline Bancorp, Inc.		20,303		213,182		2.2
Heritage Financial Corp.		5,110		109,354		1.1
				425,858
Commercial Finance & Mortgage Companies
Pathward Financial, Inc.		5,069		210,313		2.1
Insurance: Multi-Line
Horace Mann Educators Corp.		6,750		225,990		2.3
Insurance: Property-Casualty
Employers Holdings, Inc.		3,702		154,336		1.6
Genworth Financial, Inc., Class A		62,505		313,775		3.1

Security	Shares		Value			% of Basket Value
Insurance: Property-Casualty (continued)
ProAssurance Corp.		13,193	$	243,807			2.4	%
Safety Insurance Group, Inc.		2,358		175,718			1.8
				887,636
IT Services
Bread Financial Holdings, Inc.		34,802		1,055,197			10.6
Media
Vimeo, Inc.		19,045		72,942			0.7
Medical Services
Inotiv, Inc.		7,192		31,142			0.3
Real Estate Investment Trusts (REITs)
Chatham Lodging Trust		7,072		74,185	��		0.7
Utilities: Electrical
Avista Corp.		9,303		394,912			4.0
Net Value of Reference Entity — JPMorgan Chase Bank N.A.			$	9,976,651

Fair Value Hierarchy as of Period End

Various inputs are used in determining the fair value of financial instruments. These inputs to valuation techniques are categorized into a fair value hierarchy consisting of three broad levels for financial reporting purposes as follows:

• Level 1 – Unadjusted price quotations in active markets/exchanges for identical assets or liabilities that the Series has the ability to access;

• Level 2 – Other observable inputs (including, but not limited to, quoted prices for similar assets or liabilities in markets that are active, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the assets or liabilities (such as interest rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates) or other market–corroborated inputs); and

• Level 3 – Unobservable inputs based on the best information available in the circumstances, to the extent observable inputs are not available (including the Valuation Committee’s assumptions used in determining the fair value of financial instruments).

The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). Accordingly, the degree of judgment exercised in determining fair value is greatest for instruments categorized in Level 3. The inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the fair value hierarchy classification is determined based on the lowest level input that is significant to the fair value measurement in its entirety. Investments classified within Level 3 have significant unobservable inputs used by the Valuation Committee in determining the price for Fair Valued Investments. Level 3 investments include equity or debt issued by privately held companies or funds. There may not be a secondary market, and/or there are a limited number of investors. The categorization of a value determined for financial instruments is based on the pricing transparency of the financial instruments and is not necessarily an indication of the risks associated with investing in those securities. For information about the Series’s policy regarding valuation of financial instruments, refer to its most recent financial statements.

The following table summarizes the Series’s financial instruments categorized in the fair value hierarchy. The breakdown of the Series’s financial instruments into major categories is disclosed in the Schedule of Investments above.

	Level 1		Level 2		Level 3		Total
Assets
Investments
Long-Term Investments
Common Stocks
Advertising Agencies	$	5,150,627	$	—	$	—	$	5,150,627
Aerospace		32,243,705		—		—		32,243,705
Aerospace & Defense		3,524,347		—		—		3,524,347
Agriculture, Fishing & Ranching		9,271,749		—		—		9,271,749
Air Transport		12,224,094		—		—		12,224,094
Airlines		1,641,585		—		—		1,641,585
Alternative Energy		17,109,176		—		—		17,109,176
Aluminum		7,391,561		—		—		7,391,561
Asset Management & Custodian		37,437,125		—		—		37,437,125

SERIES  SCHEDULE  OF  INVESTMENTS 23

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series

Fair Value Hierarchy as of Period End (continued)

	Level 1		Level 2		Level 3		Total
Common Stocks (continued)
Auto Components	$	3,695,632	$	—	$	—	$	3,695,632
Auto Parts		43,079,805		—		—		43,079,805
Auto Services		5,284,652		—		—		5,284,652
Automobiles		451,166		—		—		451,166
Back Office Support, HR & Consulting		67,306,390		—		—		67,306,390
Banks		585,293		—		—		585,293
Banks: Diversified		285,397,745		—		—		285,397,745
Banks: Savings, Thrift & Mortgage Lending		29,995,782		—		—		29,995,782
Beverage: Soft Drinks		20,582,344		—		—		20,582,344
Biotechnology		260,033,934		—		—		260,033,934
Building Materials		30,241,101		—		—		30,241,101
Building Products		1,371,280		—		—		1,371,280
Building: Climate Control		16,165,140		—		—		16,165,140
Building: Roofing, Wallboard & Plumbing		6,910,868		—		—		6,910,868
Cable Television Services		4,498,435		—		—		4,498,435
Capital Markets		1,593,142		—		—		1,593,142
Casinos & Gambling		17,953,241		—		—		17,953,241
Cement		314,670		—		—		314,670
Chemicals		1,618,860		—		—		1,618,860
Chemicals: Diversified		37,657,888		—		—		37,657,888
Chemicals: Specialty		33,360,190		—		—		33,360,190
Coal		15,477,308		—		—		15,477,308
Commercial Banks		1,872,024		—		—		1,872,024
Commercial Finance & Mortgage Companies		11,292,822		—		—		11,292,822
Commercial Services & Supplies		5,534,065		—		—		5,534,065
Commercial Services: Rental & Leasing		30,793,990		—		—		30,793,990
Commercial Vehicles & Parts		11,320,253		—		—		11,320,253
Communications Equipment		2,300,026		—		—		2,300,026
Communications Technology		34,789,951		—		—		34,789,951
Computer Services Software & Systems		215,748,537		—		—		215,748,537
Computer Technology		34,068,285		—		—		34,068,285
Construction		23,155,663		—		—		23,155,663
Consumer Electronics		4,943,914		—		—		4,943,914
Consumer Finance		1,088,805		—		—		1,088,805
Consumer Lending		19,358,888		—		—		19,358,888
Consumer Services: Miscellaneous		14,623,170		—		—		14,623,170
Containers & Packaging		16,175,880		—		—		16,175,880
Cosmetics		11,278,426		—		—		11,278,426
Diversified Consumer Services		10,996,970		—		—		10,996,970
Diversified Financial Services		28,473,627		—		—		28,473,627
Diversified Manufacturing Operations		22,481,168		—		—		22,481,168
Diversified Materials & Processing		16,229,454		—		—		16,229,454
Diversified Media		937,725		—		—		937,725
Diversified Retail		12,281,982		—		—		12,281,982
Diversified Telecommunication Services		228,777		—		—		228,777
Drug & Grocery Store Chains		11,998,217		—		—		11,998,217
Education Services		26,380,148		—		—		26,380,148
Electrical Equipment		11,391,734		—		—		11,391,734
Electronic Components		34,727,168		—		—		34,727,168
Electronic Entertainment		272,484		—		—		272,484
Electronic Equipment, Instruments & Components		4,068,601		—		—		4,068,601
Electronics		11,845,992		—		—		11,845,992
Energy Equipment		37,994,587		—		—		37,994,587
Energy Equipment & Services		16,538,889		—		—		16,538,889
Engineering & Contracting Services		28,632,422		—		—		28,632,422
Entertainment		9,990,632		—		—		9,990,632
Environmental, Maintenance, & Security Service		20,024,204		—		—		20,024,204
Financial Data & Systems		15,083,127		—		—		15,083,127
Financial Services		7,606,845		—		—		7,606,845
Food & Staples Retailing		174,159		—		—		174,159
Food Products		6,264,921		—		—		6,264,921
Foods		46,043,929		—		—		46,043,929
Forest Products		12,382,847		—		—		12,382,847

24

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series

Fair Value Hierarchy as of Period End (continued)

	Level 1		Level 2		Level 3		Total
Common Stocks (continued)
Forms & Bulk Printing Services	$	2,311,253	$	—	$	—	$	2,311,253
Fruit & Grain Processing		2,320,119		—		—		2,320,119
Funeral Parlors & Cemeteries		8,138,177		—		—		8,138,177
Gas Pipeline		5,242,115		—		—		5,242,115
Glass		1,652,799		—		—		1,652,799
Gold		4,424,759		—		—		4,424,759
Health Care Equipment & Services		4,118,495		—		—		4,118,495
Health Care Equipment & Supplies		8,928,696		—		—		8,928,696
Health Care Facilities		22,473,583		—		—		22,473,583
Health Care Management Services		16,001,340		—		—		16,001,340
Health Care Providers & Services		7,411,407		—		—		7,411,407
Health Care Services		68,373,842		—		—		68,373,842
Health Care Technology		442,936		—		—		442,936
Health Care: Miscellaneous		8,444,290		—		—		8,444,290
Home Building		44,060,138		—		—		44,060,138
Hotel/Motel		9,534,360		—		—		9,534,360
Hotels, Restaurants & Leisure		1,298,381		—		—		1,298,381
Household Appliances		1,232,179		—		—		1,232,179
Household Durables		1,531,314		—		—		1,531,314
Household Equipment & Products		16,170,434		—		—		16,170,434
Household Furnishings		6,887,871		—		—		6,887,871
Independent Power Producers & Energy Traders		1,700,063		—		—		1,700,063
Industrial Conglomerates		867,085		—		—		867,085
Insurance		7,712,632		—		—		7,712,632
Insurance: Life		13,294,904		—		—		13,294,904
Insurance: Multi-Line		14,231,937		—		—		14,231,937
Insurance: Property-Casualty		72,051,331		—		—		72,051,331
International Trade & Diversified Logistic		3,045,504		—		—		3,045,504
Internet & Catalog Retail		2,012,777		—		—		2,012,777
Internet Software & Services		10,380,055		—		—		10,380,055
IT Services		19,430,015		—		—		19,430,015
Leisure Time		33,551,041		—		—		33,551,041
Luxury Items		7,666,866		—		—		7,666,866
Machinery		4,555,701		—		—		4,555,701
Machinery: Agricultural		14,187,898		—		—		14,187,898
Machinery: Construction & Handling		9,507,442		—		—		9,507,442
Machinery: Industrial		45,988,854		—		—		45,988,854
Machinery: Specialty		4,768,071		—		—		4,768,071
Manufactured Housing		11,575,161		—		—		11,575,161
Marine		1,993,459		—		—		1,993,459
Media		7,962,430		—		—		7,962,430
Medical & Dental Instruments & Supplies		71,738,073		—		—		71,738,073
Medical Equipment		65,839,445		—		—		65,839,445
Medical Services		1,502,816		—		—		1,502,816
Metal Fabricating		31,174,859		—		—		31,174,859
Metals & Minerals: Diversified		38,322,188		—		—		38,322,188
Mining		2,476,812		—		—		2,476,812
Office Supplies & Equipment		8,627,201		—		—		8,627,201
Oil & Gas Producers		15,391,619		—		—		15,391,619
Oil Well Equipment & Services		44,651,297		—		—		44,651,297
Oil, Gas & Consumable Fuels		22,395,660		—		—		22,395,660
Oil: Crude Producers		76,480,107		—		—		76,480,107
Oil: Refining & Marketing		17,875,300		—		—		17,875,300
Paints & Coatings		7,993,906		—		—		7,993,906
Paper		3,137,298		—		—		3,137,298
Paper & Forest Products		2,698,993		—		—		2,698,993
Personal Care		22,957,456		—		—		22,957,456
Personal Products		2,696,621		—		—		2,696,621
Pharmaceuticals		84,941,562		804,776		—		85,746,338
Photography		1,129,225		—		—		1,129,225
Power Transmission Equipment		9,379,388		—		—		9,379,388
Printing & Copying Services		8,297,645		—		—		8,297,645
Producer Durables: Miscellaneous		1,674,747		—		—		1,674,747

SERIES  SCHEDULE  OF  INVESTMENTS 25

Schedule of Investments (unaudited) (continued) March 31, 2023 Master Small Cap Index Series

Fair Value Hierarchy as of Period End (continued)

	Level 1		Level 2			Level 3		Total
Common Stocks (continued)
Production Technology Equipment	$	26,970,161	$	—		$	—	$	26,970,161
Professional Services		9,314,802		—			—		9,314,802
Publishing		5,582,688		—			—		5,582,688
Radio & TV Broadcasters		13,128,528		—			—		13,128,528
Railroad Equipment		5,149,784		—			—		5,149,784
Real Estate		15,643,066		—			—		15,643,066
Real Estate Investment Trusts (REITs)		250,427,817		—			—		250,427,817
Real Estate Management & Development		5,996,255		—			—		5,996,255
Recreational Vehicles & Boats		12,041,774		—			—		12,041,774
Rental & Leasing Services: Consumer		2,091,830		—			—		2,091,830
Restaurants		57,226,528		—			—		57,226,528
Road & Rail		425,671		—			—		425,671
Scientific Instruments: Control & Filter		32,522,591		—			—		32,522,591
Scientific Instruments: Electrical		26,063,070		—			—		26,063,070
Scientific Instruments: Gauges & Meters		14,454,553		—			—		14,454,553
Scientific Instruments: Pollution Control		10,957,281		—			—		10,957,281
Securities Brokerage & Services		5,912,927		—			—		5,912,927
Semiconductors & Components		74,574,516		—			—		74,574,516
Semiconductors & Semiconductor Equipment		8,624,321		—			—		8,624,321
Shipping		32,676,116		—			—		32,676,116
Software		36,160,617		—			—		36,160,617
Specialty Retail		86,746,315		—			—		86,746,315
Steel		17,742,474		—			—		17,742,474
Technology Hardware & Equipment		4,367,235		—			—		4,367,235
Technology: Miscellaneous		17,257,956		—			—		17,257,956
Telecommunications Equipment		8,500,572		—			—		8,500,572
Textile Products		1,011,586		—			—		1,011,586
Textiles Apparel & Shoes		29,544,724		—			—		29,544,724
Textiles, Apparel & Luxury Goods		1,570,086		—			—		1,570,086
Toys		519,942		—			—		519,942
Trading Companies & Distributors		655,187		—			—		655,187
Transportation Miscellaneous		7,829,531		—			—		7,829,531
Truckers		31,793,713		—			—		31,793,713
Utilities: Electrical		55,788,929		—			—		55,788,929
Utilities: Gas Distributors		27,955,361		—			—		27,955,361
Utilities: Miscellaneous		15,056,434		—			—		15,056,434
Utilities: Telecommunications		34,836,010		—			—		34,836,010
Utilities: Water		18,838,398		—			—		18,838,398
Wireless Telecommunication Services		66,140		—			—		66,140
Investment Companies		46,361,878		—			—		46,361,878
Rights		134		—			56,706		56,840
Short-Term Securities
Money Market Funds		346,717,185		—			—		346,717,185
	$	4,308,932,761	$	804,776		$	56,706	$	4,309,794,243
Derivative Financial Instruments(a)
Assets
Equity Contracts	$	704,382	$	—		$	—	$	704,382
Liabilities
Equity Contracts		—		(1,311,058	)		—		(1,311,058	)
	$	704,382	$	(1,311,058	)	$	—	$	(606,676	)

^(a)  Derivative financial instruments are swaps and futures contracts. Swaps and futures contracts are valued at the unrealized appreciation (depreciation) on the instrument.

Portfolio Abbreviation
ETF	Exchange-Traded Fund
REIT	Real Estate Investment Trust

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