Quantitative Master Series NPORT-P Master Small Cap Index Series (Mar 2024 report)

Schedule of Investments (unaudited)  March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Common Stocks
Advertising Agencies(a) — 0.2%
Advantage Solutions, Inc., Class A(b)		165,805	$	717,936
Boston Omaha Corp., Class A		43,005		664,857
Cardlytics, Inc.		68,129		987,189
Clear Channel Outdoor Holdings, Inc.		695,965		1,148,342
Emerald Holding, Inc.		31,940		217,512
QuinStreet, Inc.		98,542		1,740,252
Thryv Holdings, Inc.		57,797		1,284,827
Viad Corp.		37,961		1,499,080
				8,259,995
Aerospace — 0.1%
Macerich Co.		403,154		6,946,343
Aerospace & Defense — 1.0%
AAR Corp.(a)		63,101		3,777,857
AeroVironment, Inc.(a)(b)		50,372		7,721,020
AerSale Corp.(a)		62,804		450,933
Archer Aviation, Inc., Class A(a)(b)		284,431		1,314,071
Astronics Corp.(a)		51,673		983,854
Cadre Holdings, Inc.		36,236		1,311,743
Ducommun, Inc.(a)		25,073		1,286,245
Eve Holding, Inc., Class A(a)(b)		33,526		181,040
Kaman Corp.		52,494		2,407,900
Kratos Defense & Security Solutions, Inc.(a)(b)		268,536		4,935,692
Leonardo DRS, Inc.(a)		121,198		2,677,264
Moog, Inc., Class A		53,784		8,586,615
National Presto Industries, Inc.		9,617		805,905
Park Aerospace Corp.		36,578		608,292
Parsons Corp.(a)		76,977		6,385,242
Redwire Corp.(a)(b)		20,925		91,861
Rocket Lab USA, Inc., Class A(a)(b)		527,843		2,169,435
Terran Orbital Corp., Class A(a)(b)		186,416		244,205
Triumph Group, Inc.(a)		120,160		1,807,206
V2X, Inc.(a)		21,503		1,004,405
Virgin Galactic Holdings, Inc., Class A(a)(b)		666,354		986,204
				49,736,989
Agriculture, Fishing & Ranching — 0.2%
Alico, Inc.		13,435		393,377
Andersons, Inc.		60,036		3,444,265
Cadiz, Inc.(a)		68,917		199,859
Calavo Growers, Inc.		33,020		918,286
Cal-Maine Foods, Inc.		76,559		4,505,497
Fresh Del Monte Produce, Inc.		63,492		1,645,078
GrowGeneration Corp.(a)(b)		102,190		292,264
				11,398,626
Air Transport — 0.4%
Air Transport Services Group, Inc.(a)(b)		96,005		1,321,029
Allegiant Travel Co.		29,480		2,217,191
Frontier Group Holdings, Inc.(a)(b)		69,853		566,508
Hawaiian Holdings, Inc.(a)(b)		95,009		1,266,470
JetBlue Airways Corp.(a)		626,898		4,651,583
Joby Aviation, Inc., Class A(a)(b)		519,804		2,786,149
SkyWest, Inc.(a)		75,552		5,219,132
Spirit Airlines, Inc.		206,566		999,779
Sun Country Airlines Holdings, Inc.(a)		79,876		1,205,329
				20,233,170
Airlines — 0.0%
Blade Air Mobility, Inc., Class A(a)		113,832		324,421

Security	Shares		Value
Alternative Energy — 0.6%
Ameresco, Inc., Class A(a)		59,976	$	1,447,221
Centrus Energy Corp., Class A(a)(b)		23,034		956,602
Green Brick Partners, Inc.(a)		48,645		2,929,888
Green Plains, Inc.(a)		69,067		1,596,829
Permian Resources Corp., Class A		850,765		15,024,510
REX American Resources Corp.(a)		28,918		1,697,776
Sitio Royalties Corp., Class A		153,325		3,790,194
Sunnova Energy International, Inc.(a)(b)		198,238		1,215,199
				28,658,219
Aluminum — 0.1%
Century Aluminum Co.(a)(b)		98,409		1,514,515
Kaiser Aluminum Corp.		29,748		2,658,281
				4,172,796
Asset Management & Custodian — 0.7%
Artisan Partners Asset Management, Inc., Class A		109,311		5,003,164
AssetMark Financial Holdings, Inc.(a)		40,990		1,451,456
B. Riley Financial, Inc.(b)		38,083		806,217
Brightsphere Investment Group, Inc.		60,740		1,387,302
Cohen & Steers, Inc.		48,502		3,729,319
Diamond Hill Investment Group, Inc., Class A		5,182		798,909
GCM Grosvenor, Inc., Class A		81,622		788,469
Hamilton Lane, Inc., Class A		68,159		7,685,609
Open Lending Corp.(a)		185,873		1,163,565
PJT Partners, Inc., Class A		41,919		3,951,285
Silvercrest Asset Management Group, Inc., Class A		17,353		274,351
StepStone Group, Inc., Class A		102,691		3,670,176
Virtus Investment Partners, Inc.		12,743		3,160,009
WisdomTree, Inc.		257,380		2,365,322
				36,235,153
Auto Components(a) — 0.1%
Atmus Filtration Technologies, Inc.		157,018		5,063,830
Holley, Inc.		94,475		421,359
Luminar Technologies, Inc., Class A(b)		542,812		1,069,340
Solid Power, Inc., Class A(b)		296,412		601,716
				7,156,245
Auto Parts — 0.7%
Adient PLC(a)		170,497		5,612,761
American Axle & Manufacturing Holdings, Inc.(a)		212,924		1,567,121
CarParts.com, Inc.(a)		98,455		159,497
Dana, Inc.		243,192		3,088,538
Dorman Products, Inc.(a)		49,124		4,735,062
Fox Factory Holding Corp.(a)		79,577		4,143,574
Gentherm, Inc.(a)		61,134		3,520,096
Livewire Group, Inc.(a)(b)		20,808		150,442
Standard Motor Products, Inc.		38,332		1,286,039
Stoneridge, Inc.(a)		49,826		918,791
Visteon Corp.(a)		51,461		6,052,328
Workhorse Group, Inc.(a)(b)		488,541		114,612
XPEL, Inc.(a)		42,174		2,278,240
				33,627,101
Auto Services — 0.1%
Goodyear Tire & Rubber Co.(a)		525,193		7,210,900
Back Office Support, HR & Consulting — 1.6%
ASGN, Inc.(a)		86,008		9,010,198
Barrett Business Services, Inc.		12,134		1,537,620
CBIZ, Inc.(a)		89,401		7,017,978
Conduent, Inc.(a)		321,945		1,088,174
CRA International, Inc.		12,675		1,895,927
DHI Group, Inc.(a)(b)		77,446		197,487

SERIES  SCHEDULE  OF INVESTMENTS 1

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Back Office Support, HR & Consulting (continued)
ExlService Holdings, Inc.(a)		301,605	$	9,591,039
Forrester Research, Inc.(a)		23,199		500,170
Hackett Group, Inc.		46,693		1,134,640
Heidrick & Struggles International, Inc.		36,971		1,244,444
HireQuest, Inc.		8,825		114,284
Huron Consulting Group, Inc.(a)		34,670		3,349,815
ICF International, Inc.		34,926		5,260,903
Insperity, Inc.		66,329		7,270,322
Kelly Services, Inc., Class A		58,298		1,459,782
Kforce, Inc.		35,096		2,474,970
Korn Ferry		97,317		6,399,566
Liquidity Services, Inc.(a)		43,311		805,585
Maximus, Inc.		113,466		9,519,797
NV5 Global, Inc.(a)		25,931		2,541,497
Resources Connection, Inc.		57,810		760,780
Target Hospitality Corp.(a)		56,424		613,329
TriNet Group, Inc.		59,718		7,912,038
TrueBlue, Inc.(a)		55,028		688,951
TTEC Holdings, Inc.		34,584		358,636
				82,747,932
Banks: Diversified — 7.9%
1st Source Corp.		30,754		1,612,125
ACNB Corp.		14,538		546,629
AlTi Global, Inc., Class A(a)		43,787		247,834
Ambac Financial Group, Inc.(a)		82,517		1,289,741
Amerant Bancorp, Inc., Class A		48,158		1,121,600
American National Bankshares, Inc.		18,537		885,327
Ameris Bancorp		115,960		5,610,145
Ames National Corp.		15,023		303,164
Arrow Financial Corp.		27,075		677,416
Associated Banc-Corp.		282,382		6,074,037
Atlantic Union Bankshares Corp.		124,813		4,407,147
Axos Financial, Inc.(a)(b)		102,085		5,516,673
Banc of California, Inc.		255,933		3,892,741
BancFirst Corp.		41,099		3,617,945
Banco Latinoamericano de Comercio Exterior SA, Class E		51,284		1,519,032
Bancorp, Inc.(a)		90,175		3,017,255
Bank First Corp.		17,406		1,508,578
Bank of Hawaii Corp.		61,336		3,826,753
Bank of Marin Bancorp		30,235		507,041
Bank of NT Butterfield & Son Ltd.		90,531		2,896,087
Bank7 Corp.		6,514		183,695
BankUnited, Inc.		116,969		3,275,132
Bankwell Financial Group, Inc.		10,372		269,050
Banner Corp.		52,372		2,513,856
Bar Harbor Bankshares		26,929		713,080
BayCom Corp.		20,844		429,595
BCB Bancorp, Inc.		28,739		300,323
Berkshire Hills Bancorp, Inc.		62,941		1,442,608
Blue Foundry Bancorp(a)(b)		41,980		392,933
Blue Ridge Bankshares, Inc.		27,012		72,662
Bridgewater Bancshares, Inc.(a)		39,970		465,251
Burke & Herbert Financial Services Corp.		12,271		687,544
Business First Bancshares, Inc.		45,690		1,017,973
Byline Bancorp, Inc.		46,970		1,020,188
C&F Financial Corp.		5,730		280,770
Cadence Bank		265,097		7,687,813
Cambridge Bancorp		14,388		980,686
Camden National Corp.		26,000		871,520
Capital Bancorp, Inc.		16,840		350,777

Security	Shares		Value
Banks: Diversified (continued)
Capital City Bank Group, Inc.		24,236	$	671,337
Capitol Federal Financial, Inc.		234,215		1,395,921
Capstar Financial Holdings, Inc.		34,372		690,877
Carter Bankshares, Inc.(a)		40,550		512,552
Cathay General Bancorp		115,863		4,383,097
Central Pacific Financial Corp.		36,134		713,646
Central Valley Community Bancorp/CA		17,431		346,703
Chemung Financial Corp.		6,111		259,595
ChoiceOne Financial Services, Inc.		12,186		333,287
Citizens & Northern Corp.		25,956		487,454
Citizens Financial Services, Inc.		7,146		351,583
City Holding Co.		24,459		2,549,117
Civista Bancshares, Inc.		26,972		414,829
CNB Financial Corp.		39,353		802,408
Coastal Financial Corp.(a)		20,532		798,079
Codorus Valley Bancorp, Inc.		16,311		371,238
Colony Bankcorp, Inc.		29,633		340,779
Columbia Financial, Inc.(a)(b)		53,961		928,669
Community Bank System, Inc.		86,724		4,165,354
Community Trust Bancorp, Inc.		28,981		1,236,040
ConnectOne Bancorp, Inc.		68,308		1,332,006
CrossFirst Bankshares, Inc.(a)		84,284		1,166,491
Customers Bancorp, Inc.(a)(b)		53,365		2,831,547
CVB Financial Corp.		248,209		4,428,049
Eagle Bancorp, Inc.		54,741		1,285,866
Eastern Bankshares, Inc.		289,098		3,983,770
Enterprise Bancorp, Inc.		18,217		473,095
Enterprise Financial Services Corp.		67,690		2,745,506
Equity Bancshares, Inc., Class A		27,275		937,442
Esquire Financial Holdings, Inc.		12,602		598,217
ESSA Bancorp, Inc.		15,158		276,330
Evans Bancorp, Inc.		9,139		272,891
Farmers & Merchants Bancorp, Inc.		20,766		462,874
Farmers National Banc Corp.		68,659		917,284
FB Financial Corp.		66,184		2,492,489
Fidelity D&D Bancorp, Inc.		8,135		393,978
Finance of America Cos., Inc., Class A(a)		85,338		62,732
Financial Institutions, Inc.		27,991		526,791
First Bancorp, Inc.		17,071		420,629
First BanCorp./Puerto Rico		268,924		4,716,927
First Bancorp/Southern Pines NC		70,809		2,557,621
First Bancshares, Inc.		57,224		1,484,963
First Bank/Hamilton		38,021		522,409
First Busey Corp.		96,857		2,329,411
First Business Financial Services, Inc.		13,674		512,775
First Commonwealth Financial Corp.		188,028		2,617,350
First Community Bankshares, Inc.		32,030		1,109,199
First Community Corp.		12,860		224,150
First Financial Bancorp		167,074		3,745,799
First Financial Bankshares, Inc.		243,164		7,978,211
First Financial Corp.		21,340		817,962
First Foundation, Inc.		97,945		739,485
First Interstate BancSystem, Inc., Class A		154,117		4,193,524
First Merchants Corp.		110,284		3,848,912
First Mid Bancshares, Inc.		35,377		1,156,120
First of Long Island Corp.		39,152		434,196
First Western Financial, Inc.(a)(b)		14,336		209,019
Five Star Bancorp		21,940		493,650
FS Bancorp, Inc.		11,563		401,352
Fulton Financial Corp.		271,157		4,308,685
FVCBankcorp, Inc.(a)		26,676		324,914
German American Bancorp, Inc.		52,312		1,812,088

2

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Banks: Diversified (continued)
Glacier Bancorp, Inc.		208,078	$	8,381,382
Great Southern Bancorp, Inc.		16,721		916,645
Greene County Bancorp, Inc.		11,935		343,609
Guaranty Bancshares, Inc.		14,529		441,100
Hancock Whitney Corp.		161,887		7,453,277
Hanmi Financial Corp.		35,695		568,264
HarborOne Bancorp, Inc.		76,683		817,441
HBT Financial, Inc.		24,276		462,215
Heartland Financial USA, Inc.		78,851		2,771,613
Heritage Commerce Corp.		111,385		955,683
Hilltop Holdings, Inc.		87,098		2,727,909
Hippo Holdings, Inc.(a)(b)		20,168		368,469
Home Bancorp, Inc.		12,514		479,411
Home BancShares, Inc.		352,235		8,654,414
HomeStreet, Inc.		35,096		528,195
Hope Bancorp, Inc.		214,798		2,472,325
Horizon Bancorp, Inc.		82,248		1,055,242
Independent Bank Corp.		104,415		4,440,558
Independent Bank Group, Inc.		67,486		3,080,736
International Bancshares Corp.		100,212		5,625,902
John Marshall Bancorp, Inc.		21,461		384,581
Kearny Financial Corp.		107,957		695,243
Lakeland Bancorp, Inc.		116,329		1,407,581
Lakeland Financial Corp.		46,097		3,057,153
LCNB Corp.		21,989		350,505
Live Oak Bancshares, Inc.		62,747		2,604,628
Macatawa Bank Corp.		50,259		492,036
MainStreet Bancshares, Inc.		12,152		220,680
Mercantile Bank Corp.		29,270		1,126,602
Merchants Bancorp		29,589		1,277,653
Metrocity Bankshares, Inc.		32,493		811,025
Metropolitan Bank Holding Corp.(a)		19,439		748,401
Mid Penn Bancorp, Inc.		26,338		527,023
Middlefield Banc Corp.		13,712		327,443
Midland States Bancorp, Inc.		38,777		974,466
MVB Financial Corp.		22,189		495,037
National Bank Holdings Corp., Class A		58,670		2,116,227
National Bankshares, Inc.		10,079		336,739
NBT Bancorp, Inc.		76,900		2,820,692
Nicolet Bankshares, Inc.		24,453		2,102,713
Northeast Bank		12,823		709,625
Northeast Community Bancorp, Inc.		23,352		367,327
Northfield Bancorp, Inc.		69,894		679,370
Northrim BanCorp, Inc.		9,603		485,047
Northwest Bancshares, Inc.		207,025		2,411,841
Norwood Financial Corp.		12,876		350,356
Oak Valley Bancorp		11,745		291,041
OFG Bancorp		86,085		3,168,789
Old National Bancorp		546,599		9,516,289
Old Second Bancorp, Inc.		80,936		1,120,154
Orange County Bancorp, Inc.		8,911		409,906
Origin Bancorp, Inc.		54,434		1,700,518
Orrstown Financial Services, Inc.		18,376		491,925
Pacific Premier Bancorp, Inc.		160,048		3,841,152
Park National Corp.		26,734		3,631,814
Parke Bancorp, Inc.		17,784		306,329
Pathward Financial, Inc.		44,169		2,229,651
PCB Bancorp		20,635		336,970
Peapack-Gladstone Financial Corp.		30,885		751,432
Penns Woods Bancorp, Inc.		11,958		232,105
Peoples Bancorp, Inc.		65,094		1,927,433
Peoples Financial Services Corp.		13,368		576,294

Security	Shares		Value
Banks: Diversified (continued)
Pioneer Bancorp, Inc./New York(a)		20,117	$	197,348
Plumas Bancorp		9,541		351,013
Ponce Financial Group, Inc.(a)		34,079		303,303
Preferred Bank/Los Angeles CA		12,047		924,848
Primis Financial Corp.		39,691		483,039
Princeton Bancorp, Inc.		8,867		272,926
Provident Financial Services, Inc.		118,929		1,732,795
QCR Holdings, Inc.		30,747		1,867,573
RBB Bancorp		30,980		557,950
Red River Bancshares, Inc.		8,662		431,281
Renasant Corp.		89,631		2,807,243
Republic Bancorp, Inc., Class A		15,864		809,064
S&T Bancorp, Inc.		71,135		2,282,011
Sandy Spring Bancorp, Inc.		81,784		1,895,753
Seacoast Banking Corp. of Florida		149,383		3,792,834
ServisFirst Bancshares, Inc.		95,037		6,306,655
Shore Bancshares, Inc.		56,040		644,460
Sierra Bancorp		25,898		523,140
Simmons First National Corp., Class A		210,534		4,096,992
SmartFinancial, Inc.		29,881		629,593
South Plains Financial, Inc.		21,387		572,316
Southern First Bancshares, Inc.(a)		14,658		465,538
Southern States Bancshares, Inc.		13,089		339,267
Southside Bancshares, Inc.		53,572		1,565,910
SouthState Corp.		142,032		12,076,981
Stellar Bancorp, Inc.		90,796		2,211,791
Sterling Bancorp, Inc.(a)		33,926		175,058
Stock Yards Bancorp, Inc.		50,624		2,476,020
Summit Financial Group, Inc.		21,499		583,913
Texas Capital Bancshares, Inc.(a)		88,163		5,426,433
Third Coast Bancshares, Inc.(a)		24,718		494,854
Timberland Bancorp, Inc.		13,172		354,590
Tompkins Financial Corp.		25,851		1,300,047
Towne Bank/Portsmouth VA		130,904		3,673,166
TriCo Bancshares		57,944		2,131,180
Triumph Financial, Inc.(a)		41,451		3,287,893
TrustCo Bank Corp./New York		33,091		931,843
Trustmark Corp.		102,208		2,873,067
UMB Financial Corp.		82,613		7,186,505
United Bankshares, Inc.		244,126		8,737,270
United Community Banks, Inc.		204,544		5,383,598
Unity Bancorp, Inc.		12,604		347,870
Univest Financial Corp.		54,091		1,126,175
USCB Financial Holdings, Inc., Class A		16,653		189,844
Valley National Bancorp		805,347		6,410,562
Veritex Holdings, Inc.		86,584		1,774,106
Virginia National Bankshares Corp.		8,243		248,114
WaFd, Inc.		126,208		3,663,818
Washington Trust Bancorp, Inc.		32,036		861,128
Waterstone Financial, Inc.		33,221		404,300
WesBanco, Inc.		107,622		3,208,212
West BanCorp, Inc.		27,302		486,795
Westamerica BanCorp		48,294		2,360,611
WSFS Financial Corp.		98,833		4,461,322
				395,588,104
Banks: Savings, Thrift & Mortgage Lending — 0.2%
Amalgamated Financial Corp.		32,965		791,160
Brookline Bancorp, Inc.		155,320		1,546,987
Flushing Financial Corp.		48,800		615,368
Heritage Financial Corp.		61,709		1,196,538
Hingham Institution For Savings The(b)		2,735		477,148

SERIES  SCHEDULE  OF INVESTMENTS 3

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Banks: Savings, Thrift & Mortgage Lending (continued)
OceanFirst Financial Corp.		108,659	$	1,783,094
Premier Financial Corp.		65,985		1,339,495
Southern Missouri Bancorp, Inc.		15,250		666,578
				8,416,368
Beverage: Soft Drinks — 0.3%
Coca-Cola Consolidated, Inc.		8,907		7,538,974
Duckhorn Portfolio, Inc.(a)		99,464		926,010
National Beverage Corp.(a)		44,213		2,098,349
Primo Water Corp.		291,903		5,315,554
Zevia PBC, Class A(a)(b)		41,042		48,019
				15,926,906
Biotechnology — 7.8%
2seventy bio, Inc.(a)		95,966		513,418
4D Molecular Therapeutics, Inc.(a)		75,722		2,412,503
89bio, Inc.(a)(b)		147,383		1,715,538
Aadi Bioscience, Inc.(a)(b)		28,957		67,759
ACELYRIN, Inc.(a)		135,377		913,795
Acrivon Therapeutics, Inc.(a)		22,179		158,580
Actinium Pharmaceuticals, Inc.(a)(b)		50,156		392,721
Adicet Bio, Inc.(a)		80,908		190,134
ADMA Biologics, Inc.(a)		397,348		2,622,497
Aerovate Therapeutics, Inc.(a)		21,576		638,002
Agenus, Inc.(a)(b)		720,672		417,990
Agios Pharmaceuticals, Inc.(a)		103,537		3,027,422
Akero Therapeutics, Inc.(a)		114,702		2,897,373
Aldeyra Therapeutics, Inc.(a)(b)		86,250		282,037
Alector, Inc.(a)		134,853		811,815
Allakos, Inc.(a)		113,371		142,847
Allogene Therapeutics, Inc.(a)(b)		176,128		787,292
Allovir, Inc.(a)		89,023		67,203
Alpine Immune Sciences, Inc.(a)		71,669		2,840,959
Altimmune, Inc.(a)		100,455		1,022,632
ALX Oncology Holdings, Inc.(a)		49,167		548,212
Amicus Therapeutics, Inc.(a)		540,984		6,372,791
Amylyx Pharmaceuticals, Inc.(a)		89,639		254,575
AnaptysBio, Inc.(a)(b)		35,735		804,752
Anavex Life Sciences Corp.(a)(b)		132,540		674,629
ANI Pharmaceuticals, Inc.(a)(b)		27,408		1,894,715
Annexon, Inc.(a)(b)		123,513		885,588
Apogee Therapeutics, Inc.(a)		77,120		5,124,624
Arbutus Biopharma Corp.(a)		236,161		609,295
Arcellx, Inc.(a)(b)		71,496		4,972,547
Arcturus Therapeutics Holdings, Inc.(a)		43,463		1,467,745
Arcus Biosciences, Inc.(a)(b)		100,254		1,892,796
Arcutis Biotherapeutics, Inc.(a)(b)		147,415		1,460,883
Ardelyx, Inc.(a)(b)		429,740		3,137,102
ArriVent Biopharma, Inc.(a)		17,232		307,764
ARS Pharmaceuticals, Inc.(a)(b)		45,757		467,637
Arvinas, Inc.(a)(b)		94,014		3,880,898
Astria Therapeutics, Inc.(a)		92,911		1,307,722
Atara Biotherapeutics, Inc.(a)		187,044		129,809
Aura Biosciences, Inc.(a)		66,487		521,923
Aurinia Pharmaceuticals, Inc.(a)(b)		252,417		1,264,609
Avid Bioservices, Inc.(a)		117,426		786,754
Avidity Biosciences, Inc.(a)		137,879		3,518,672
Avita Medical, Inc.(a)		45,770		733,693
Beam Therapeutics, Inc.(a)(b)		139,033		4,593,650
BioAtla, Inc.(a)(b)		87,433		300,770
BioCryst Pharmaceuticals, Inc.(a)(b)		353,314		1,794,835
Biohaven Ltd.(a)(b)		127,519		6,974,014
Biomea Fusion, Inc.(a)(b)		38,457		574,932

Security	Shares		Value
Biotechnology (continued)
BioVie, Inc., Class A(a)		7,448	$	3,937
Bioxcel Therapeutics, Inc.(a)(b)		33,014		93,099
Bluebird Bio, Inc.(a)(b)		371,883		476,010
Blueprint Medicines Corp.(a)		113,356		10,752,950
Bridgebio Pharma, Inc.(a)(b)		217,444		6,723,368
Cabaletta Bio, Inc.(a)(b)		64,410		1,098,835
Cargo Therapeutics, Inc.(a)		39,724		886,640
Caribou Biosciences, Inc.(a)(b)		152,601		784,369
Carisma Therapeutics, Inc.(a)		45,121		102,425
Cartesian Therapeutics, Inc.(a)(b)		225,801		146,771
Castle Biosciences, Inc.(a)		46,529		1,030,617
Catalyst Pharmaceuticals, Inc.(a)		207,668		3,310,228
Celcuity, Inc.(a)		35,083		757,793
Celldex Therapeutics, Inc.(a)		115,847		4,862,099
Century Therapeutics, Inc.(a)		47,754		199,612
Cerevel Therapeutics Holdings, Inc.(a)		133,489		5,642,580
CG oncology, Inc.(a)		43,356		1,903,328
Codexis, Inc.(a)		133,793		466,938
Cogent Biosciences, Inc.(a)(b)		157,273		1,056,875
Coherus Biosciences, Inc.(a)(b)		200,058		478,139
Collegium Pharmaceutical, Inc.(a)(b)		60,939		2,365,652
Compass Therapeutics, Inc.(a)		172,862		342,267
Crinetics Pharmaceuticals, Inc.(a)		122,957		5,755,617
Cue Biopharma, Inc.(a)(b)		65,421		123,646
Cullinan Oncology, Inc.(a)		48,195		821,243
Cytokinetics, Inc.(a)		178,087		12,485,680
Day One Biopharmaceuticals, Inc.(a)		116,782		1,929,239
Deciphera Pharmaceuticals, Inc.(a)		99,622		1,567,054
Denali Therapeutics, Inc.(a)(b)		222,573		4,567,198
Design Therapeutics, Inc.(a)		56,353		227,103
Disc Medicine, Inc.(a)		17,582		1,094,655
Douglas Elliman, Inc.		138,611		219,005
Dynavax Technologies Corp.(a)		241,599		2,998,244
Dyne Therapeutics, Inc.(a)		110,207		3,128,777
Editas Medicine, Inc.(a)(b)		153,334		1,137,738
Emergent BioSolutions, Inc.(a)		105,509		266,938
Entrada Therapeutics, Inc.(a)		41,561		588,919
Erasca, Inc.(a)		141,256		290,987
EyePoint Pharmaceuticals, Inc.(a)		69,511		1,436,792
Fate Therapeutics, Inc.(a)		157,973		1,159,522
Fennec Pharmaceuticals, Inc.(a)		34,891		387,988
FibroGen, Inc.(a)		175,944		413,468
Foghorn Therapeutics, Inc.(a)		36,217		243,016
Genelux Corp.(a)(b)		32,989		212,119
Generation Bio Co.(a)		79,184		322,279
Geron Corp.(a)		954,988		3,151,460
Gritstone bio, Inc.(a)		168,348		432,654
Guardant Health, Inc.(a)		210,564		4,343,935
Halozyme Therapeutics, Inc.(a)		242,063		9,847,123
Harvard Bioscience, Inc.(a)		74,015		313,824
Heron Therapeutics, Inc.(a)(b)		185,313		513,317
HilleVax, Inc.(a)		48,869		812,691
Humacyte, Inc.(a)		114,329		355,563
Ideaya Biosciences, Inc.(a)(b)		122,653		5,382,014
IGM Biosciences, Inc.(a)(b)		27,135		261,853
Immuneering Corp., Class A(a)		37,971		109,736
ImmunityBio, Inc.(a)(b)		247,134		1,327,110
Immunovant, Inc.(a)		100,574		3,249,546
Inhibrx, Inc.(a)		64,018		2,238,069
Inozyme Pharma, Inc.(a)		85,659		656,148
Insmed, Inc.(a)(b)		257,665		6,990,451
Intellia Therapeutics, Inc.(a)		167,097		4,596,838

4

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Biotechnology (continued)
Iovance Biotherapeutics, Inc.(a)(b)		442,332	$	6,555,360
iTeos Therapeutics, Inc.(a)		47,838		652,510
Janux Therapeutics, Inc.(a)		32,238		1,213,761
KalVista Pharmaceuticals, Inc.(a)(b)		58,366		692,221
Karyopharm Therapeutics, Inc.(a)		196,221		296,294
Keros Therapeutics, Inc.(a)(b)		47,855		3,168,001
Kezar Life Sciences, Inc.(a)(b)		122,594		110,531
Kiniksa Pharmaceuticals Ltd., Class A(a)		59,247		1,168,943
Kodiak Sciences, Inc.(a)		58,852		309,562
Krystal Biotech, Inc.(a)		40,289		7,168,622
Kura Oncology, Inc.(a)		131,528		2,805,492
Kymera Therapeutics, Inc.(a)		76,003		3,055,321
Larimar Therapeutics, Inc.(a)(b)		49,990		379,424
LENZ Therapeutics, Inc.		8,241		184,022
Lexeo Therapeutics, Inc.(a)		17,971		281,785
Lexicon Pharmaceuticals, Inc.(a)(b)		182,144		437,146
Ligand Pharmaceuticals, Inc.(a)(b)		31,403		2,295,559
Lineage Cell Therapeutics, Inc.(a)		264,191		391,003
Lyell Immunopharma, Inc.(a)		334,394		745,699
MacroGenics, Inc.(a)		113,441		1,669,852
Madrigal Pharmaceuticals, Inc.(a)(b)		27,580		7,364,963
MannKind Corp.(a)(b)		486,161		2,202,309
Marinus Pharmaceuticals, Inc.(a)(b)		102,052		922,550
MaxCyte, Inc.(a)		160,480		672,411
MeiraGTx Holdings PLC(a)		57,379		348,291
Merrimack Pharmaceuticals, Inc.(a)		20,778		306,891
Mersana Therapeutics, Inc.(a)		206,656		925,819
MiMedx Group, Inc.(a)		215,120		1,656,424
Mineralys Therapeutics, Inc.(a)		31,577		407,659
Mirum Pharmaceuticals, Inc.(a)(b)		46,129		1,158,760
Monte Rosa Therapeutics, Inc.(a)		55,657		392,382
Morphic Holding, Inc.(a)(b)		71,094		2,502,509
Mural Oncology PLC(a)		29,826		145,849
Myriad Genetics, Inc.(a)		163,489		3,485,585
Nautilus Biotechnology, Inc.(a)		86,024		252,911
NGM Biopharmaceuticals, Inc.(a)(b)		70,260		111,713
Nkarta, Inc.(a)		57,519		621,780
Novavax, Inc.(a)(b)		211,165		1,009,369
Nurix Therapeutics, Inc.(a)		88,730		1,304,331
Nuvalent, Inc., Class A(a)		49,535		3,719,583
Nuvectis Pharma, Inc.(a)		14,205		116,481
Ocean Biomedical, Inc.(a)(b)		12,815		48,505
Olema Pharmaceuticals, Inc.(a)		48,721		551,522
Omega Therapeutics, Inc.(a)(b)		39,455		144,011
Omeros Corp.(a)(b)		118,423		408,559
OPKO Health, Inc.(a)(b)		743,881		892,657
ORIC Pharmaceuticals, Inc.(a)(b)		72,755		1,000,381
Outlook Therapeutics, Inc.(a)(b)		13,087		156,259
Ovid therapeutics, Inc.(a)		108,595		331,215
Pacific Biosciences of California, Inc.(a)		469,871		1,762,016
PDS Biotechnology Corp.(a)		47,347		187,494
PepGen, Inc.(a)		19,300		283,710
Phathom Pharmaceuticals, Inc.(a)(b)		60,733		644,984
PMV Pharmaceuticals, Inc.(a)		67,477		114,711
Poseida Therapeutics, Inc.(a)		128,294		409,258
Precigen, Inc.(a)(b)		231,899		336,254
Prelude Therapeutics, Inc.(a)		26,682		126,473
Prime Medicine, Inc.(a)		72,268		505,876
ProKidney Corp., Class A(a)(b)		83,450		136,858
Protagonist Therapeutics, Inc.(a)		106,465		3,080,032
Protalix BioTherapeutics, Inc.(a)(b)		116,801		147,169
Prothena Corp. PLC(a)		78,649		1,948,136

Security	Shares		Value
Biotechnology (continued)
PTC Therapeutics, Inc.(a)		134,307	$	3,906,991
Pulse Biosciences, Inc.(a)(b)		29,860		260,081
Quantum-Si, Inc., Class A(a)		203,133		400,172
RadNet, Inc.(a)		112,307		5,464,859
Rallybio Corp.(a)		51,825		95,876
RAPT Therapeutics, Inc.(a)(b)		52,767		473,848
Recursion Pharmaceuticals, Inc., Class A(a)(b)		259,684		2,589,049
REGENXBIO, Inc.(a)		76,667		1,615,374
Relay Therapeutics, Inc.(a)(b)		176,577		1,465,589
Reneo Pharmaceuticals, Inc.(a)		22,003		36,525
Replimune Group, Inc.(a)		92,161		752,955
REVOLUTION Medicines, Inc.(a)		260,003		8,379,897
Rhythm Pharmaceuticals, Inc.(a)		99,539		4,313,025
Rigel Pharmaceuticals, Inc.(a)		305,297		451,840
Rocket Pharmaceuticals, Inc.(a)		116,938		3,150,310
Sage Therapeutics, Inc.(a)(b)		98,546		1,846,752
Sagimet Biosciences, Inc., Series A(a)(b)		43,013		233,130
Sana Biotechnology, Inc.(a)		178,854		1,788,540
Sangamo Therapeutics, Inc.(a)		254,025		170,248
Savara, Inc.(a)		163,794		815,694
Scholar Rock Holding Corp.(a)(b)		107,439		1,908,117
Scilex Holding, (Acquired 01/06/23, Cost: $1,040,392)(c)		99,274		149,690
Seres Therapeutics, Inc.(a)(b)		168,991		130,816
SpringWorks Therapeutics, Inc.(a)		127,651		6,282,982
Stoke Therapeutics, Inc.(a)(b)		51,961		701,473
Summit Therapeutics, Inc.(a)(b)		219,365		908,171
Sutro Biopharma, Inc.(a)		113,702		642,416
Tango Therapeutics, Inc.(a)(b)		85,796		681,220
Tenaya Therapeutics, Inc.(a)(b)		89,074		465,857
Travere Therapeutics, Inc.(a)		136,600		1,053,186
Turnstone Biologics Corp.(a)(b)		11,216		29,386
Twist Bioscience Corp.(a)(b)		107,816		3,699,167
Tyra Biosciences, Inc.(a)		27,624		453,034
UroGen Pharma Ltd.(a)		51,904		778,560
Vanda Pharmaceuticals, Inc.(a)		104,632		430,038
Vaxcyte, Inc.(a)		197,857		13,515,612
Vaxxinity, Inc., Class A(a)(b)		79,461		57,013
Vera Therapeutics, Inc., Class A(a)		74,753		3,223,349
Veracyte, Inc.(a)		135,696		3,007,023
Vericel Corp.(a)		88,776		4,618,127
Verrica Pharmaceuticals, Inc.(a)(b)		43,082		255,045
Verve Therapeutics, Inc.(a)(b)		122,800		1,630,784
Vigil Neuroscience, Inc.(a)		25,497		86,945
Viking Therapeutics, Inc.(a)(b)		190,871		15,651,422
Vir Biotechnology, Inc.(a)		156,105		1,581,344
Viridian Therapeutics, Inc.(a)		92,719		1,623,510
Vor BioPharma, Inc.(a)(b)		61,309		145,302
X4 Pharmaceuticals, Inc.(a)(b)		247,545		344,088
Xencor, Inc.(a)		108,114		2,392,563
XOMA Corp.(a)(b)		13,737		330,375
Y-mAbs Therapeutics, Inc.(a)(b)		68,578		1,115,078
Zentalis Pharmaceuticals, Inc.(a)(b)		108,553		1,710,795
Zevra Therapeutics, Inc.(a)(b)		67,788		393,170
Zura Bio Ltd., Class A(a)		41,448		106,521
Zymeworks, Inc.(a)		103,696		1,090,882
				394,454,118
Building Materials — 1.1%
Aspen Aerogels, Inc.(a)(b)		95,262		1,676,611
BlueLinx Holdings, Inc.(a)		15,780		2,055,187
Gibraltar Industries, Inc.(a)		57,011		4,591,096
Griffon Corp.		73,424		5,384,916

SERIES  SCHEDULE  OF INVESTMENTS 5

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Building Materials (continued)
Masonite International Corp.(a)		40,864	$	5,371,573
Masterbrand, Inc.(a)		238,672		4,472,713
Patrick Industries, Inc.		39,412		4,708,552
Quanex Building Products Corp.		61,565		2,365,943
Simpson Manufacturing Co., Inc.		80,071		16,428,968
Summit Materials, Inc., Class A(a)(b)		222,837		9,931,845
				56,987,404
Building Products — 0.1%
Janus International Group, Inc.(a)(b)		158,384		2,396,350
Building: Climate Control — 0.6%
AAON, Inc.		126,376		11,133,726
Comfort Systems USA, Inc.		66,035		20,979,980
				32,113,706
Building: Roofing, Wallboard & Plumbing(a) — 0.3%
Beacon Roofing Supply, Inc.		117,971		11,563,517
JELD-WEN Holding, Inc.		158,782		3,370,942
				14,934,459
Cable Television Services(a) — 0.1%
AMC Networks, Inc., Class A		59,240		718,581
Liberty Latin America Ltd., Class A		64,571		450,060
Liberty Latin America Ltd., Class C(b)		256,481		1,792,802
WideOpenWest, Inc.(b)		90,232		326,640
				3,288,083
Capital Markets — 0.2%
Bakkt Holdings, Inc., Class A(a)(b)		134,184		61,698
BGC Group, Inc., Class A		627,213		4,873,445
Forge Global Holdings, Inc.(a)		198,874		383,827
P10, Inc., Class A		82,401		693,816
Patria Investments Ltd., Class A		103,387		1,534,263
Perella Weinberg Partners, Class A		78,417		1,108,032
Victory Capital Holdings, Inc., Class A		49,993		2,121,203
				10,776,284
Casinos & Gambling — 0.5%
Accel Entertainment, Inc., Class A(a)		99,513		1,173,258
Century Casinos, Inc.(a)		46,991		148,492
Full House Resorts, Inc.(a)		57,565		320,637
Inspired Entertainment, Inc.(a)		41,140		405,640
International Game Technology PLC		202,551		4,575,627
Light & Wonder, Inc., Class A(a)		168,579		17,210,230
Monarch Casino & Resort, Inc.		25,122		1,883,899
				25,717,783
Cement — 0.0%
Concrete Pumping Holdings, Inc.(a)		45,872		362,389
Chemicals — 0.0%
Perimeter Solutions SA(a)		281,420		2,088,136
Chemicals: Diversified — 1.0%
AdvanSix, Inc.		48,615		1,390,389
American Vanguard Corp., Series 13A		48,673		630,315
Arcadium Lithium PLC(a)		1,908,549		8,225,846
Avient Corp.		168,692		7,321,233
Cabot Corp.		101,468		9,355,350
Core Molding Technologies, Inc.(a)		13,518		255,896
CSW Industrials, Inc.		28,749		6,744,515
Danimer Scientific, Inc., Class A(a)(b)		156,759		170,867
Ecovyst, Inc.(a)		172,592		1,924,401
Hawkins, Inc.		36,097		2,772,250
Ingevity Corp.(a)		68,185		3,252,425
LSB Industries, Inc.(a)		101,756		893,418

Security	Shares		Value
Chemicals: Diversified (continued)
Origin Materials, Inc., Class A(a)		208,846	$	106,511
PureCycle Technologies, Inc.(a)(b)		216,588		1,347,177
Rayonier Advanced Materials, Inc.(a)		124,380		594,536
Sensient Technologies Corp.		78,519		5,432,730
Valhi, Inc.		3,801		65,301
				50,483,160
Chemicals: Specialty — 0.6%
Balchem Corp.		59,671		9,246,021
FutureFuel Corp.		49,446		398,040
Innospec, Inc.		46,538		6,000,610
Orion SA		103,294		2,429,475
Quaker Chemical Corp.		25,906		5,317,206
Stepan Co.		39,738		3,578,010
Trinseo PLC		64,806		244,967
Tronox Holdings PLC		218,372		3,788,754
				31,003,083
Coal — 0.4%
Arch Resources, Inc., Class A		33,576		5,398,685
CONSOL Energy, Inc.		56,996		4,773,985
Hallador Energy Co.(a)		40,665		216,745
Peabody Energy Corp.		210,577		5,108,598
Warrior Met Coal, Inc.		96,499		5,857,489
				21,355,502
Commercial Banks — 0.0%
Dime Community Bancshares, Inc.		65,224		1,256,214
HomeTrust Bancshares, Inc.		26,999		738,153
				1,994,367
Commercial Finance & Mortgage Companies — 0.3%
Federal Agricultural Mortgage Corp., Class C		17,024		3,351,685
PennyMac Financial Services, Inc., Class A		47,590		4,334,973
RE/MAX Holdings, Inc., Class A		32,749		287,209
Velocity Financial, Inc.(a)		14,028		252,504
Walker & Dunlop, Inc.		59,339		5,996,799
				14,223,170
Commercial Services & Supplies — 0.2%
ACV Auctions, Inc., Class A(a)		236,990		4,448,302
Aris Water Solution, Inc., Class A		55,725		788,509
Aurora Innovation, Inc., Class A(a)(b)		665,837		1,877,660
Information Services Group, Inc.		62,665		253,167
LanzaTech Global, Inc.(a)		35,658		110,361
Li-Cycle Holdings Corp.(a)(b)		245,362		252,723
National Research Corp., Class A		26,849		1,063,489
Performant Financial Corp.(a)		127,724		375,509
				9,169,720
Commercial Services: Rental & Leasing — 1.0%
DNOW, Inc.(a)		198,635		3,019,252
FTAI Aviation Ltd.		185,683		12,496,466
GATX Corp.		66,242		8,878,415
GMS, Inc.(a)		74,740		7,275,192
H&E Equipment Services, Inc.		59,972		3,849,003
Herc Holdings, Inc.		52,732		8,874,796
McGrath RentCorp		46,061		5,682,545
Rush Enterprises, Inc., Class B		17,400		927,246
Willis Lease Finance Corp.(a)		5,319		263,929
				51,266,844
Commercial Vehicles & Parts — 0.5%
Blue Bird Corp.(a)		52,127		1,998,549
Commercial Vehicle Group, Inc.(a)		59,424		382,096
Cooper-Standard Holdings, Inc.(a)		32,114		531,808

6

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Commercial Vehicles & Parts (continued)
Miller Industries, Inc.		20,817	$	1,042,932
Modine Manufacturing Co.(a)		95,984		9,136,717
REV Group, Inc.		59,034		1,304,061
Rush Enterprises, Inc., Class A		113,168		6,056,751
Shyft Group, Inc.		61,233		760,514
Wabash National Corp.		85,899		2,571,816
				23,785,244
Communications Equipment — 0.0%
CommScope Holding Co., Inc.(a)		407,621		533,984
Communications Technology — 0.6%
908 Devices, Inc.(a)(b)		40,135		303,019
ADTRAN Holdings, Inc.		148,086		805,588
Anterix, Inc.(a)(b)		24,361		818,773
Aviat Networks, Inc.(a)		21,227		813,843
Bandwidth, Inc., Class A(a)		43,693		797,834
Bel Fuse, Inc., Class B		19,625		1,183,584
Calix, Inc.(a)		109,992		3,647,335
Comtech Telecommunications Corp.(a)		49,342		169,243
Digi International, Inc.(a)(b)		66,380		2,119,513
DZS, Inc.(a)		36,771		48,538
EchoStar Corp., Class A(a)		226,962		3,234,209
Extreme Networks, Inc.(a)		235,360		2,716,054
Harmonic, Inc.(a)		205,378		2,760,280
Infinera Corp.(a)(b)		371,960		2,242,919
InterDigital, Inc.		47,984		5,108,377
KVH Industries, Inc.(a)		32,730		166,923
NETGEAR, Inc.(a)		55,606		876,907
Ooma, Inc.(a)		42,780		364,913
Ribbon Communications, Inc.(a)		172,537		552,118
				28,729,970
Computer Services Software & Systems — 6.1%
A10 Networks, Inc.		131,724		1,803,302
ACI Worldwide, Inc.(a)		202,336		6,719,579
Adeia, Inc.		199,550		2,179,086
Alarm.com Holdings, Inc.(a)		89,364		6,476,209
Alkami Technology, Inc.(a)		75,661		1,858,991
Altair Engineering, Inc., Class A(a)(b)		102,359		8,818,228
American Software, Inc., Class A		61,814		707,770
Appfolio, Inc., Class A(a)		35,819		8,837,980
Appian Corp., Class A(a)(b)		76,523		3,057,094
Applied Digital Corp.(a)(b)		162,765		696,634
Asana, Inc., Class A(a)(b)		154,812		2,398,038
Asure Software, Inc.(a)		42,634		331,693
BigCommerce Holdings, Inc., Series 1(a)(b)		127,907		881,279
Blackbaud, Inc.(a)		81,237		6,022,911
Blackline, Inc.(a)		106,210		6,859,042
Box, Inc., Class A(a)		262,960		7,447,027
Brightcove, Inc.(a)		73,596		142,776
Cargurus, Inc., Class A(a)		178,871		4,128,343
Cerence, Inc.(a)		77,090		1,214,167
Cleanspark, Inc.(a)		359,566		7,626,395
CommVault Systems, Inc.(a)		82,197		8,337,242
CoreCard Corp.(a)		12,635		139,617
CSG Systems International, Inc.		55,231		2,846,606
Digimarc Corp.(a)(b)		27,143		737,747
Digital Turbine, Inc.(a)		189,210		495,730
DigitalOcean Holdings, Inc.(a)(b)		114,225		4,361,110
Domo, Inc., Class B(a)		62,616		558,535
E2open Parent Holdings, Inc., Class A(a)(b)		320,667		1,423,761
Envestnet, Inc.(a)(b)		80,710		4,673,916

Security	Shares		Value
Computer Services Software & Systems (continued)
ePlus, Inc.(a)		49,571	$	3,893,306
Eventbrite, Inc., Class A(a)		147,086		806,031
Everbridge, Inc.(a)		77,064		2,684,139
EverQuote, Inc., Class A(a)		40,042		743,179
Evolent Health, Inc., Class A(a)(b)		209,542		6,870,882
fuboTV, Inc.(a)		534,537		844,568
Grid Dynamics Holdings, Inc., Class A(a)(b)		105,045		1,291,003
Grindr, Inc.(a)		74,875		758,484
LivePerson, Inc.(a)		132,237		131,893
LiveRamp Holdings, Inc.(a)		120,433		4,154,938
Magnite, Inc.(a)(b)		252,363		2,712,902
Marathon Digital Holdings, Inc.(a)(b)		417,893		9,436,024
MicroStrategy, Inc., Class A(a)(b)		27,706		47,226,539
Mitek Systems, Inc.(a)		81,192		1,144,807
Multiplan Corp., Class A(a)		746,236		605,347
NetScout Systems, Inc.(a)		127,274		2,779,664
Nextdoor Holdings, Inc., Class A(a)		271,173		610,139
ON24, Inc.		55,490		396,199
OneSpan, Inc.(a)		75,492		877,972
PagerDuty, Inc.(a)		166,454		3,775,177
PAR Technology Corp.(a)(b)		50,828		2,305,558
PDF Solutions, Inc.(a)		57,750		1,944,442
Perficient, Inc.(a)		64,016		3,603,461
Progress Software Corp.		82,255		4,385,014
PROS Holdings, Inc.(a)(b)		83,364		3,028,614
Q2 Holdings, Inc.(a)		106,176		5,580,611
Rackspace Technology, Inc.(a)(b)		105,363		166,474
Rapid7, Inc.(a)(b)		113,098		5,546,326
Red Violet, Inc.(a)		18,960		370,668
Rimini Street, Inc.(a)(b)		98,633		321,544
Riot Platforms, Inc.(a)(b)		368,746		4,513,451
Sapiens International Corp. NV		57,307		1,842,993
Schrodinger, Inc./United States(a)(b)		101,586		2,742,822
Shutterstock, Inc.		46,004		2,107,443
Simulations Plus, Inc.		29,565		1,216,600
SoundThinking, Inc.(a)		20,096		319,124
Sprout Social, Inc., Class A(a)(b)		90,531		5,405,606
SPS Commerce, Inc.(a)		68,461		12,658,439
System1, Inc., Class A(a)		71,276		139,701
TechTarget, Inc.(a)		48,374		1,600,212
Tenable Holdings, Inc.(a)		217,041		10,728,337
Tucows, Inc., Class A(a)		17,444		323,761
Unisys Corp.(a)		128,016		628,559
Upwork, Inc.(a)		233,226		2,859,351
Varonis Systems, Inc.(a)(b)		202,762		9,564,284
Verint Systems, Inc.(a)		114,182		3,785,133
Veritone, Inc.(a)(b)		47,390		249,271
Verra Mobility Corp., Class A(a)		255,233		6,373,168
Viant Technology, Inc., Class A(a)		28,084		299,375
Workiva, Inc., Class A(a)(b)		92,725		7,863,080
Yelp, Inc.(a)		124,178		4,892,613
Yext, Inc.(a)		199,589		1,203,522
Zuora, Inc., Class A(a)		252,949		2,306,895
				304,400,453
Computer Technology — 2.4%
3D Systems Corp.(a)(b)		243,652		1,081,815
Cantaloupe, Inc.(a)		104,368		671,086
Corsair Gaming, Inc.(a)		69,558		858,346
Immersion Corp.		57,785		432,232
Impinj, Inc.(a)(b)		43,505		5,586,477
Insight Enterprises, Inc.(a)		52,449		9,730,338

SERIES  SCHEDULE  OF INVESTMENTS 7

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Computer Technology (continued)
PC Connection, Inc.		21,348	$	1,407,474
Super Micro Computer, Inc.(a)		94,894		95,845,787
Synaptics, Inc.(a)(b)		73,622		7,182,562
				122,796,117
Construction — 0.6%
Bowman Consulting Group Ltd.(a)		20,781		722,971
Construction Partners, Inc., Class A(a)(b)		79,974		4,490,540
Granite Construction, Inc.		82,272		4,700,199
Great Lakes Dredge & Dock Corp.(a)		123,167		1,077,711
INNOVATE Corp.(a)		95,742		67,087
Knife River Corp.(a)		105,549		8,557,913
Limbach Holdings, Inc.(a)		17,796		737,110
Primoris Services Corp.		99,036		4,215,963
Southland Holdings, Inc.(a)		4,576		23,566
Sterling Infrastructure, Inc.(a)		55,855		6,161,365
Tutor Perini Corp.(a)		79,154		1,144,567
				31,898,992
Consumer Electronics(a) — 0.1%
Sonos, Inc.		230,983		4,402,536
VOXX International Corp., Class A		22,647		184,800
Vuzix Corp.(b)		103,757		125,546
				4,712,882
Consumer Finance(a) — 0.1%
Consumer Portfolio Services, Inc.		13,308		100,608
NerdWallet, Inc., Class A		63,717		936,640
OppFi, Inc., Class A		20,875		52,188
Upstart Holdings, Inc.(b)		138,424		3,722,221
				4,811,657
Consumer Lending — 0.4%
Encore Capital Group, Inc.(a)		43,343		1,976,874
Enova International, Inc.(a)		52,871		3,321,885
LendingTree, Inc.(a)		19,935		844,048
Marcus & Millichap, Inc.		44,247		1,511,920
Navient Corp.		155,594		2,707,335
Nelnet, Inc., Class A		24,061		2,277,374
PRA Group, Inc.(a)		72,035		1,878,673
PROG Holdings, Inc.		82,632		2,845,846
Regional Management Corp.		15,561		376,732
World Acceptance Corp.(a)		7,598		1,101,558
				18,842,245
Consumer Services: Miscellaneous — 0.4%
Cars.com, Inc.(a)		124,080		2,131,694
Chuy’s Holdings, Inc.(a)		32,247		1,087,691
FirstCash Holdings, Inc.		70,276		8,963,001
OPENLANE, Inc.(a)		199,188		3,445,953
Udemy, Inc.(a)		167,121		1,834,989
WW International, Inc.(a)		97,501		180,377
				17,643,705
Containers & Packaging — 0.3%
Greif, Inc., Class A		45,371		3,132,868
Greif, Inc., Class B		10,209		709,730
Myers Industries, Inc.		68,174		1,579,592
O-I Glass, Inc.(a)		289,794		4,807,682
Pactiv Evergreen, Inc.		75,641		1,083,179

Security	Shares		Value
Containers & Packaging (continued)
Ranpak Holdings Corp., Class A(a)		82,373	$	648,275
UFP Technologies, Inc.(a)		13,220		3,334,084
				15,295,410
Cosmetics — 0.5%
elf Beauty, Inc.(a)		100,661		19,732,576
Inter Parfums, Inc.		34,238		4,810,781
				24,543,357
Diversified Consumer Services(a) — 0.4%
Duolingo, Inc., Class A		55,194		12,174,692
Frontdoor, Inc.		151,270		4,928,377
Lincoln Educational Services Corp.		46,093		476,141
Nerdy, Inc., Class A		118,298		344,247
				17,923,457
Diversified Financial Services — 0.6%
Alerus Financial Corp.		33,631		734,165
Cannae Holdings, Inc.(a)		123,402		2,744,461
Compass Diversified Holdings		117,816		2,835,831
European Wax Center, Inc., Class A(a)		64,590		838,378
Jackson Financial, Inc., Class A		131,444		8,693,706
MBIA, Inc.		82,986		560,985
MidWestOne Financial Group, Inc.		26,041		610,401
Moelis & Co., Class A		112,337		6,377,372
Piper Sandler Cos		32,360		6,423,136
SWK Holdings Corp.(a)		5,499		95,793
Tiptree, Inc.		45,482		785,929
				30,700,157
Diversified Manufacturing Operations — 0.6%
Barnes Group, Inc.		91,362		3,394,098
Custom Truck One Source, Inc.(a)		100,889		587,174
Enerpac Tool Group Corp., Class A		101,833		3,631,365
Enviri Corp.(a)		147,159		1,346,505
Federal Signal Corp.		111,794		9,487,957
Luxfer Holdings PLC		50,068		519,205
OSI Systems, Inc.(a)		30,030		4,288,885
PowerSchool Holdings, Inc., Class A(a)		105,617		2,248,586
Standex International Corp.		22,002		4,009,204
TriMas Corp.		77,384		2,068,474
				31,581,453
Diversified Materials & Processing — 0.5%
Belden, Inc.		77,716		7,197,279
Encore Wire Corp.(b)		28,047		7,370,191
Insteel Industries, Inc.		34,954		1,335,942
Koppers Holdings, Inc.		37,614		2,075,164
NL Industries, Inc.		14,377		105,383
Tredegar Corp.		49,049		319,800
Uranium Energy Corp.(a)(b)		718,243		4,848,140
				23,251,899
Diversified Media — 0.0%
EW Scripps Co., Class A(a)		118,440		465,469
Diversified Retail — 0.3%
Beyond, Inc.(a)(b)		84,118		3,020,678
Big Lots, Inc.		49,137		212,763
ContextLogic, Inc., Class A(a)		38,569		219,458
Dillard’s, Inc., Class A(b)		6,349		2,994,442
Duluth Holdings, Inc., Class B(a)		21,472		105,213

8

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Diversified Retail (continued)
Global Industrial Co.		24,764	$	1,108,932
PriceSmart, Inc.		47,488		3,988,992
Revolve Group, Inc., Class A(a)(b)		74,184		1,570,475
Savers Value Village, Inc.(a)(b)		48,708		939,090
Stitch Fix, Inc., Class A(a)		177,038		467,380
Winmark Corp.		5,325		1,926,053
				16,553,476
Diversified Telecommunication Services(a) — 0.1%
AST SpaceMobile, Inc., Class A		208,527		604,728
Lumen Technologies, Inc.		1,879,759		2,932,424
				3,537,152
Drug & Grocery Store Chains — 0.3%
Ingles Markets, Inc., Class A		26,490		2,031,253
PetMed Express, Inc.		35,060		167,937
Sprouts Farmers Market, Inc.(a)		190,058		12,254,940
Village Super Market, Inc., Class A		15,700		449,177
Weis Markets, Inc.		30,734		1,979,270
				16,882,577
Education Services — 0.6%
2U, Inc.(a)(b)		146,129		56,946
Adtalem Global Education, Inc.(a)		72,955		3,749,887
Chegg, Inc.(a)		212,349		1,607,482
Coursera, Inc.(a)		246,779		3,459,842
Franklin Covey Co.(a)		21,944		861,521
Graham Holdings Co., Class B		6,488		4,980,708
HealthStream, Inc.		44,924		1,197,674
Laureate Education, Inc., Class A		244,370		3,560,471
Perdoceo Education Corp.		114,364		2,008,232
Strategic Education, Inc.		42,210		4,394,905
Stride, Inc.(a)(b)		79,111		4,987,949
Universal Technical Institute, Inc.(a)		73,733		1,175,304
				32,040,921
Electrical Equipment — 0.2%
374Water, Inc.(a)(b)		97,984		123,460
Amprius Technologies, Inc.(a)(b)		9,428		24,984
Dragonfly Energy Holdings Corp.(a)(b)		50,615		27,332
Energy Vault Holdings, Inc.(a)		177,059		316,936
Enovix Corp.(a)(b)		258,489		2,070,497
Eos Energy Enterprises, Inc., Class A(a)(b)		285,763		294,336
ESS Tech, Inc.(a)(b)		166,053		120,106
Fluence Energy, Inc., Class A(a)(b)		109,336		1,895,886
LSI Industries, Inc.		52,240		789,869
NuScale Power Corp., Class A(a)		104,764		556,297
SES AI Corp., Class A(a)		229,971		386,351
Shoals Technologies Group, Inc., Class A(a)(b)		319,841		3,575,822
SKYX Platforms Corp.(a)(b)		117,137		153,450
				10,335,326
Electronic Components — 0.7%
Aeva Technologies, Inc.(a)(b)		29,900		117,507
Array Technologies, Inc.(a)		282,525		4,212,448
Methode Electronics, Inc.		65,139		793,393
MicroVision, Inc.(a)(b)		355,917		654,887
Novanta, Inc.(a)		66,789		11,672,714
NVE Corp.		9,047		815,858
Rogers Corp.(a)		32,298		3,833,450
Sanmina Corp.(a)		102,783		6,391,047
ScanSource, Inc.(a)		46,112		2,030,773

Security	Shares		Value
Electronic Components (continued)
Stem, Inc.(a)(b)		275,886	$	604,190
TTM Technologies, Inc.(a)		190,156		2,975,941
				34,102,208
Electronic Entertainment(a) — 0.0%
PlayAGS, Inc.		68,215		612,571
Turtle Beach Corp.		30,441		524,803
				1,137,374
Electronic Equipment, Instruments & Components — 0.2%
Climb Global Solutions, Inc.		7,473		529,686
Daktronics, Inc.(a)(b)		69,803		695,238
Evolv Technologies Holdings, Inc., Class A(a)		214,286		953,573
Iteris, Inc.(a)		75,185		371,414
Lightwave Logic, Inc.(a)(b)		218,417		1,022,192
Luna Innovations, Inc.(a)(b)		61,264		196,351
Mirion Technologies, Inc., Class A(a)		373,666		4,248,582
Presto Automation, Inc.(a)		9,019		1,569
Richardson Electronics Ltd.		23,313		214,713
SmartRent, Inc., Class A(a)		351,249		941,347
Tingo Group, Inc.(a)(b)		205,487		5,261
				9,179,926
Electronics(a) — 0.5%
Agilysys, Inc.		37,725		3,178,709
Integer Holdings Corp.		61,925		7,225,409
iRobot Corp.		48,773		427,251
NEXTracker, Inc., Class A		234,722		13,207,807
nLight, Inc.		84,165		1,094,145
				25,133,321
Energy Equipment — 1.0%
API Group Corp.(a)(b)		390,221		15,323,979
Arcosa, Inc.		90,495		7,769,901
Bloom Energy Corp., Class A(a)(b)		359,306		4,038,599
Diamond Offshore Drilling, Inc.(a)		189,755		2,588,258
Expro Group Holdings NV(a)		167,025		3,335,489
FuelCell Energy, Inc.(a)(b)		848,108		1,009,249
Matador Resources Co.		211,371		14,113,242
SunPower Corp.(a)(b)		157,908		473,724
TPI Composites, Inc.(a)		72,806		211,865
				48,864,306
Energy Equipment & Services — 0.7%
Atlas Energy Solutions, Inc.		33,180		750,532
Borr Drilling Ltd.		409,929		2,808,014
Core Laboratories, Inc.		87,435		1,493,390
Forum Energy Technologies, Inc.(a)		17,115		341,958
KLX Energy Services Holdings, Inc.(a)		23,902		185,001
Kodiak Gas Services, Inc.(b)		29,658		810,850
Mammoth Energy Services, Inc.(a)(b)		45,251		164,714
Ranger Energy Services, Inc., Class A		27,445		309,854
SEACOR Marine Holdings, Inc.(a)		46,375		646,467
Seadrill Ltd.(a)		87,384		4,395,415
Valaris Ltd.(a)		111,025		8,355,741
Verde Clean Fuels, Inc., Class A(a)		6,336		25,344
Weatherford International PLC(a)		132,819		15,329,969
				35,617,249
Engineering & Contracting Services — 0.8%
Argan, Inc.		23,629		1,194,210
Dycom Industries, Inc.(a)		53,467		7,674,118
Exponent, Inc.		94,470		7,811,724
Fluor Corp.(a)		266,046		11,248,425

SERIES  SCHEDULE  OF INVESTMENTS 9

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Engineering & Contracting Services (continued)
IES Holdings, Inc.(a)		15,274	$	1,857,929
Mistras Group, Inc.(a)		39,042		373,242
MYR Group, Inc.(a)		30,664		5,419,862
NETSTREIT Corp.		129,008		2,369,877
VSE Corp.		24,415		1,953,200
Willdan Group, Inc.(a)		22,688		657,725
				40,560,312
Entertainment — 0.3%
Atlanta Braves Holdings, Inc., Series A(a)		104,218		4,125,516
Cinemark Holdings, Inc.(a)(b)		205,014		3,684,102
Golden Entertainment, Inc.		37,746		1,390,185
IMAX Corp.(a)		83,778		1,354,691
Lions Gate Entertainment Corp., Class A(a)		108,736		1,081,923
Lions Gate Entertainment Corp., Class B(a)		224,694		2,091,901
Loop Media, Inc.(a)		59,121		21,662
Madison Square Garden Entertainment Corp.(a)		74,110		2,905,853
Playstudios, Inc., Class A(a)		158,927		441,817
Reservoir Media, Inc.(a)		38,285		303,600
				17,401,250
Environmental, Maintenance, & Security Service — 0.5%
ABM Industries, Inc.		117,487		5,242,270
BrightView Holdings, Inc.(a)		78,392		932,865
Brink’s Co.		83,375		7,702,182
Healthcare Services Group, Inc.(a)		138,806		1,732,299
IBEX Holdings Ltd.(a)		16,667		257,172
Montrose Environmental Group, Inc.(a)		52,566		2,059,010
SP Plus Corp.(a)		36,490		1,905,508
UniFirst Corp.		27,989		4,854,132
				24,685,438
Financial Data & Systems — 0.3%
Atlanticus Holdings Corp.(a)		8,447		249,947
Cass Information Systems, Inc.		25,520		1,229,298
Donnelley Financial Solutions, Inc.(a)		46,142		2,861,266
Everi Holdings, Inc.(a)		151,719		1,524,776
EVERTEC, Inc.		121,888		4,863,331
Green Dot Corp., Class A(a)		71,709		669,045
I3 Verticals, Inc., Class A(a)		42,030		962,067
International Money Express, Inc.(a)		58,773		1,341,788
LendingClub Corp.(a)		202,494		1,779,922
Priority Technology Holdings, Inc.(a)		27,679		90,510
Repay Holdings Corp., Class A(a)		154,665		1,701,315
Value Line, Inc.(b)		1,578		63,909
				17,337,174
Financial Services — 0.3%
Acacia Research Corp.(a)		74,872		399,068
Enact Holdings, Inc.		55,230		1,722,071
Ispire Technology, Inc.(a)(b)		32,214		197,472
Karat Packaging, Inc.		12,882		368,554
NewtekOne, Inc.		42,892		471,812
Ocwen Financial Corp.(a)		12,172		328,766
Pagseguro Digital Ltd., Class A(a)		370,354		5,288,655
Paysign, Inc.(a)		60,862		222,755
Security National Financial Corp., Class A(a)(b)		21,792		172,375
Turning Point Brands, Inc.		32,152		942,053
Universal Corp.		44,969		2,325,797
Vector Group Ltd.		271,134		2,971,628
				15,411,006

Security	Shares		Value
Food & Staples Retailing — 0.0%
Natural Grocers by Vitamin Cottage, Inc.		17,991	$	324,738
Food Products — 0.1%
Benson Hill, Inc.(a)(b)		300,534		60,257
Beyond Meat, Inc.(a)(b)		111,396		922,359
BRC, Inc., Class A(a)		77,301		330,848
Dole PLC		133,391		1,591,355
Forafric Global PLC(a)(b)		9,653		100,005
Hain Celestial Group, Inc.(a)		166,780		1,310,891
Limoneira Co.		33,384		652,991
SunOpta, Inc.(a)		174,737		1,200,443
Westrock Coffee Co.(a)(b)		53,027		547,769
				6,716,918
Foods — 0.8%
B&G Foods, Inc.		145,006		1,658,869
Chefs’ Warehouse, Inc.(a)(b)		65,654		2,472,530
HF Foods Group, Inc.(a)		64,885		227,097
J & J Snack Foods Corp.		28,093		4,061,124
John B Sanfilippo & Son, Inc.		16,718		1,770,771
Lancaster Colony Corp.		36,438		7,565,622
Medifast, Inc.		20,017		767,051
Mission Produce, Inc.(a)(b)		91,158		1,082,045
Nature’s Sunshine Products, Inc.(a)		24,658		512,147
Seneca Foods Corp., Class A(a)(b)		9,375		533,437
Simply Good Foods Co.(a)		169,336		5,762,504
SpartanNash Co.		64,370		1,300,918
TreeHouse Foods, Inc.(a)		94,687		3,688,059
United Natural Foods, Inc.(a)		110,521		1,269,886
Utz Brands, Inc., Class A		134,295		2,476,400
Vita Coco Co., Inc.(a)		70,266		1,716,598
Vital Farms, Inc.(a)		57,987		1,348,198
				38,213,256
Forest Products — 0.5%
Boise Cascade Co.		74,091		11,363,337
UFP Industries, Inc.		112,043		13,782,409
				25,145,746
Forms & Bulk Printing Services — 0.1%
Deluxe Corp.		81,177		1,671,434
Ennis, Inc.		47,535		974,943
Quad/Graphics, Inc., Class A		53,805		285,705
				2,932,082
Fruit & Grain Processing — 0.1%
MGP Ingredients, Inc.		29,580		2,547,725
Funeral Parlors & Cemeteries — 0.2%
Carriage Services, Inc.		24,227		655,098
Hillenbrand, Inc.		130,735		6,574,663
Matthews International Corp., Class A		55,414		1,722,267
				8,952,028
Gas Pipeline — 0.3%
Equitrans Midstream Corp.		814,806		10,176,927
Kinetik Holdings, Inc., Class A		67,906		2,707,412
NextDecade Corp.(a)(b)		141,760		805,197
				13,689,536
Glass — 0.1%
Apogee Enterprises, Inc.		41,216		2,439,987
Gold — 0.1%
Caledonia Mining Corp. PLC		28,639		317,034

10

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Gold (continued)
Coeur Mining, Inc.(a)(b)		669,042	$	2,522,288
Novagold Resources, Inc.(a)		450,958		1,352,874
				4,192,196
Health Care Equipment & Services — 0.1%
Embecta Corp.		107,728		1,429,551
Figs, Inc., Class A(a)		238,353		1,186,998
				2,616,549
Health Care Equipment & Supplies — 0.2%
Adaptive Biotechnologies Corp.(a)		215,546		691,903
Inogen, Inc.(a)		46,655		376,506
Nano-X Imaging Ltd.(a)(b)		86,733		847,381
OmniAb, Inc.(a)(b)		174,959		948,278
OmniAb, Inc., 12.50 Earnout Shares(d)		9,003		—
OmniAb, Inc., 15.00 Earnout Shares(d)		9,003		—
Paragon 28, Inc.(a)		82,444		1,018,183
PROCEPT BioRobotics Corp.(a)(b)		75,224		3,717,570
Vicarious Surgical, Inc., Class A(a)		121,523		36,639
Zimvie, Inc.(a)		49,204		811,374
				8,447,834
Health Care Facilities — 0.7%
Astrana Health, Inc.(a)(b)		80,887		3,396,445
Brookdale Senior Living, Inc.(a)(b)		347,568		2,297,424
CVRx, Inc.(a)		19,870		361,833
Ensign Group, Inc.		101,705		12,654,136
Joint Corp.(a)		26,101		340,879
LifeStance Health Group, Inc.(a)(b)		197,836		1,220,648
National HealthCare Corp.		23,288		2,200,949
Pliant Therapeutics, Inc.(a)		106,525		1,587,223
RxSight, Inc.(a)		52,994		2,733,431
Select Medical Holdings Corp.		193,847		5,844,487
Sight Sciences, Inc.(a)		38,565		203,623
U.S. Physical Therapy, Inc.		27,751		3,132,255
				35,973,333
Health Care Management Services(a) — 0.4%
Enhabit, Inc.		93,878		1,093,679
Hims & Hers Health, Inc., Class A		230,907		3,572,131
Option Care Health, Inc.		312,606		10,484,805
Progyny, Inc.(b)		148,154		5,652,075
Quipt Home Medical Corp.		73,634		321,781
TruBridge, Inc.		25,663		236,613
				21,361,084
Health Care Providers & Services(a) — 0.0%
23andMe Holding Co., Class A(b)		579,844		308,477
DocGo, Inc.(b)		145,712		588,676
P3 Health Partners, Inc., Class A		69,896		71,993
				969,146
Health Care Services — 1.4%
Accolade, Inc.(a)		129,387		1,355,976
Addus HomeCare Corp.(a)		29,178		3,015,255
Agiliti, Inc.(a)		56,703		573,834
AirSculpt Technologies, Inc.(a)(b)		19,556		120,074
Alignment Healthcare, Inc.(a)		161,825		802,652
American Well Corp., Class A(a)		455,326		369,133
AMN Healthcare Services, Inc.(a)		71,075		4,442,898
Aveanna Healthcare Holdings, Inc.(a)		99,315		247,294
BrightSpring Health Services, Inc.(a)		100,534		1,092,805
Butterfly Network, Inc., Class A(a)(b)		260,971		281,849
Cara Therapeutics, Inc.(a)		77,774		70,774
CareMax,Inc., Class A(a)(b)		4,348		20,957

Security	Shares		Value
Health Care Services (continued)
CorVel Corp.(a)		16,260	$	4,275,730
Cross Country Healthcare, Inc.(a)		62,593		1,171,741
Definitive Healthcare Corp., Class A(a)		89,111		719,126
Health Catalyst, Inc.(a)		106,440		801,493
HealthEquity, Inc.(a)		158,637		12,949,538
Inari Medical, Inc.(a)		99,745		4,785,765
ModivCare, Inc.(a)		24,724		579,778
NeoGenomics, Inc.(a)		237,531		3,733,987
Omnicell, Inc.(a)		83,809		2,449,737
OptimizeRx Corp.(a)		28,884		350,941
Pediatrix Medical Group, Inc.(a)		156,916		1,573,867
Pennant Group, Inc.(a)		53,201		1,044,336
Phibro Animal Health Corp., Class A		38,274		494,883
Phreesia, Inc.(a)		98,785		2,363,925
Privia Health Group, Inc.(a)(b)		209,938		4,112,685
Ryman Hospitality Properties, Inc.		108,868		12,586,229
Sharecare, Inc., Class A(a)(b)		568,164		436,066
Surgery Partners, Inc.(a)		140,970		4,205,135
Viemed Healthcare, Inc.(a)		64,686		609,989
				71,638,452
Home Building — 1.6%
Beazer Homes USA, Inc.(a)		54,958		1,802,622
Century Communities, Inc.		53,066		5,120,869
Hovnanian Enterprises, Inc., Class A(a)		9,093		1,427,056
Installed Building Products, Inc.(b)		44,213		11,439,230
KB Home		127,147		9,012,179
Legacy Housing Corp.(a)		20,390		438,793
LGI Homes, Inc.(a)(b)		38,828		4,518,414
M/I Homes, Inc.(a)		50,251		6,848,709
MDC Holdings, Inc.		111,875		7,038,056
Meritage Homes Corp.		67,948		11,922,156
Taylor Morrison Home Corp., Class A(a)		193,271		12,015,658
Tile Shop Holdings, Inc.(a)		56,497		397,174
Tri Pointe Homes, Inc.(a)		179,404		6,935,759
				78,916,675
Hotel/Motel — 0.2%
Bally’s Corp.(a)		56,062		781,504
First Watch Restaurant Group, Inc.(a)(b)		41,543		1,022,789
Krispy Kreme, Inc.		163,283		2,487,616
Marcus Corp.		44,558		635,397
Red Rock Resorts, Inc., Class A		88,796		5,311,777
Xponential Fitness, Inc., Class A(a)		43,835		725,031
				10,964,114
Hotels, Restaurants & Leisure — 0.1%
Bowlero Corp., Class A(b)		30,627		419,590
Empire Resorts, Inc.(d)		5,132		—
Global Business Travel Group I, Class A(a)(b)		58,993		354,548
Mondee Holdings, Inc., Class A(a)(b)		87,266		201,585
Six Flags Entertainment Corp.(a)		136,101		3,582,178
Super Group SGHC Ltd.(a)		257,267		887,571
				5,445,472
Household Appliances(a) — 0.0%
Landsea Homes Corp.		36,898		536,128
Snap One Holdings Corp.		32,217		277,711
Traeger, Inc.		59,759		151,190
				965,029
Household Durables — 0.1%
Cricut, Inc., Class A		86,100		409,836
Dream Finders Homes, Inc., Class A(a)		45,171		1,975,328

SERIES  SCHEDULE  OF INVESTMENTS 11

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Household Durables (continued)
United Homes Group, Inc., Class A(a)(b)		12,199	$	85,271
Vizio Holding Corp., Class A(a)(b)		143,178		1,566,367
Waldencast PLC, Class A(a)		56,516		367,354
				4,404,156
Household Equipment & Products — 0.5%
Central Garden & Pet Co.(a)		17,972		769,741
Central Garden & Pet Co., Class A(a)		96,293		3,555,138
Energizer Holdings, Inc.		133,653		3,934,744
Helen of Troy Ltd.(a)		44,360		5,112,046
Zurn Elkay Water Solutions Corp.		276,033		9,238,825
				22,610,494
Household Furnishings — 0.2%
American Woodmark Corp.(a)		29,929		3,042,582
Ethan Allen Interiors, Inc.		42,598		1,472,613
Hooker Furnishings Corp.		19,177		460,440
La-Z-Boy, Inc.		80,979		3,046,430
Lovesac Co.(a)		25,932		586,063
Purple Innovation, Inc.(b)		91,301		158,864
Sleep Number Corp.(a)		41,158		659,762
				9,426,754
Independent Power Producers & Energy Traders(a) — 0.0%
Altus Power, Inc., Class A(b)		116,386		556,325
Montauk Renewables, Inc.		128,305		533,749
				1,090,074
Industrial Conglomerates — 0.0%
Brookfield Business Corp., Class A		48,473		1,170,138
Insurance — 0.4%
F&G Annuities & Life, Inc.		31,514		1,277,893
Fidelis Insurance Holdings Ltd.		112,944		2,200,149
GoHealth, Inc., Class A(a)(b)		6,637		69,755
Hamilton Insurance Group Ltd., Class B(a)		32,854		457,656
Kingsway Financial Services, Inc.(a)		20,483		170,828
Lemonade, Inc.(a)(b)		94,546		1,551,500
Marqeta, Inc., Class A(a)		879,611		5,242,481
Mercury General Corp.		49,995		2,579,742
Oscar Health, Inc., Class A(a)		300,348		4,466,175
Skyward Specialty Insurance Group, Inc.(a)		55,539		2,077,714
				20,093,893
Insurance: Life — 0.4%
American Equity Investment Life Holding Co.(a)		146,656		8,245,000
CNO Financial Group, Inc.		208,916		5,741,012
National Western Life Group, Inc., Class A(b)		4,243		2,087,386
Selectquote, Inc.(a)		254,562		509,124
Trupanion, Inc.(a)(b)		73,805		2,037,756
				18,620,278
Insurance: Multi-Line — 0.4%
BRP Group, Inc., Class A(a)		112,307		3,250,165
Crawford & Co., Class A		27,631		260,560
eHealth, Inc.(a)		56,934		343,312
Goosehead Insurance, Inc., Class A(a)		40,191		2,677,524
Horace Mann Educators Corp.		63,440		2,346,646
James River Group Holdings Ltd.		71,214		662,290
Maiden Holdings Ltd.(a)		178,052		400,617
Mr. Cooper Group, Inc.(a)		120,318		9,378,788
SiriusPoint Ltd.(a)		132,748		1,687,227
				21,007,129
Insurance: Property-Casualty — 1.3%
American Coastal Insurance Corp.(a)		37,089		396,481

Security	Shares		Value
Insurance: Property-Casualty (continued)
AMERISAFE, Inc.		35,565	$	1,784,296
Donegal Group, Inc., Class A		30,640		433,250
Employers Holdings, Inc.		41,660		1,890,947
Enstar Group Ltd.(a)		22,257		6,916,585
Essent Group Ltd.		195,480		11,633,015
Genworth Financial, Inc., Class A(a)		710,538		4,568,759
Greenlight Capital Re Ltd., Class A(a)		48,876		609,484
HCI Group, Inc.		13,595		1,578,107
Investors Title Co.		2,120		345,963
NI Holdings, Inc.(a)		13,752		208,343
NMI Holdings, Inc., Class A(a)		148,652		4,807,406
Palomar Holdings, Inc.(a)		45,482		3,812,756
ProAssurance Corp.		77,287		993,911
Radian Group, Inc.		246,110		8,237,302
Safety Insurance Group, Inc.		25,198		2,071,024
Selective Insurance Group, Inc.		112,323		12,262,302
Stewart Information Services Corp.		40,510		2,635,580
United Fire Group, Inc.		38,079		828,980
Universal Insurance Holdings, Inc.		45,838		931,428
				66,945,919
International Trade & Diversified Logistic(a) — 0.0%
CryoPort, Inc.(b)		80,672		1,427,894
Radiant Logistics, Inc.		64,025		347,016
				1,774,910
Internet & Catalog Retail(a) — 0.0%
BARK, Inc.(b)		266,213		330,104
ThredUp, Inc., Class A(b)		134,848		269,696
Vivid Seats, Inc., Class A		139,387		834,928
				1,434,728
Internet Software & Services(a) — 0.3%
eGain Corp.		40,271		259,748
Flywire Corp.		198,202		4,917,392
Gogo, Inc.		123,639		1,085,550
MediaAlpha, Inc., Class A		42,828		872,406
Outbrain, Inc.		70,537		278,621
Remitly Global, Inc.		253,680		5,261,323
Rent the Runway, Inc., Class A(b)		86,971		30,040
TrueCar, Inc.		168,364		570,754
Xometry, Inc., Class A		63,303		1,069,188
				14,345,022
IT Services — 0.5%
BigBear.ai Holdings, Inc.(a)		96,597		198,024
Bread Financial Holdings, Inc.		45,593		1,697,883
Fastly, Inc., Class A(a)		228,097		2,958,418
Payoneer Global, Inc.(a)		441,513		2,145,753
Paysafe Ltd.(a)		59,359		937,279
Sabre Corp.(a)		617,693		1,494,817
SolarWinds Corp.(a)		96,252		1,214,700
Squarespace, Inc., Class A(a)		105,903		3,859,105
StoneCo Ltd., Class A(a)		542,914		9,017,802
Thoughtworks Holding, Inc.(a)		168,475		426,242
				23,950,023
Leisure Time — 0.7%
Acushnet Holdings Corp.		56,515		3,727,164
AMMO, Inc.(a)		168,298		462,819
Clarus Corp.		45,706		308,516
Escalade, Inc.		17,369		238,824
Hilton Grand Vacations, Inc.(a)(b)		147,131		6,946,055
JAKKS Pacific, Inc.(a)		13,882		342,885
Johnson Outdoors, Inc., Class A		9,970		459,717

12

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Leisure Time (continued)
Latham Group, Inc.(a)		68,765	$	272,309
Life Time Group Holdings, Inc.(a)		83,271		1,292,366
Lindblad Expeditions Holdings, Inc.(a)		67,668		631,342
OneSpaWorld Holdings Ltd.(a)		155,587		2,058,416
Portillo’s, Inc., Class A(a)(b)		84,515		1,198,423
RCI Hospitality Holdings, Inc.		16,445		953,810
Smith & Wesson Brands, Inc.		85,283		1,480,513
Sphere Entertainment Co., Class A(a)		49,625		2,435,595
Sturm Ruger & Co., Inc.		32,615		1,505,182
Topgolf Callaway Brands Corp.(a)		268,433		4,340,562
United Parks & Resorts, Inc.(a)		67,837		3,813,118
Vista Outdoor, Inc.(a)		107,758		3,532,307
				35,999,923
Life Sciences Tools & Services — 0.0%
WaVe Life Sciences Ltd.(a)		130,259		803,698
Luxury Items — 0.2%
Movado Group, Inc.		29,297		818,265
Signet Jewelers Ltd.		81,479		8,153,604
Stagwell, Inc., Class A(a)(b)		155,004		964,125
				9,935,994
Machinery(a) — 0.1%
Hillman Solutions Corp.(b)		364,179		3,874,865
Matterport, Inc., Class A		486,886		1,100,362
Microvast Holdings, Inc.(b)		449,037		375,844
Velo3D, Inc.(b)		153,863		70,100
				5,421,171
Machinery: Agricultural — 0.4%
Alamo Group, Inc.		18,826		4,298,540
Integral Ad Science Holding Corp.(a)		125,673		1,252,960
Lindsay Corp.		20,618		2,425,914
SPX Technologies, Inc.(a)(b)		82,346		10,139,263
Titan International, Inc.(a)		95,848		1,194,266
Titan Machinery, Inc.(a)		38,632		958,460
				20,269,403
Machinery: Construction & Handling — 0.2%
Astec Industries, Inc.		42,394		1,853,042
Douglas Dynamics, Inc.		42,138		1,016,368
Manitowoc Co., Inc.(a)		65,698		928,970
NACCO Industries, Inc., Class A		7,348		221,909
Terex Corp.		124,052		7,988,949
				12,009,238
Machinery: Industrial — 1.3%
Applied Industrial Technologies, Inc.		71,989		14,221,427
Chart Industries, Inc.(a)(b)		80,182		13,207,579
Columbus McKinnon Corp./New York		52,621		2,348,475
Desktop Metal, Inc., Class A(a)(b)		547,221		481,554
DXP Enterprises, Inc.(a)		24,675		1,325,788
Enpro, Inc.		39,084		6,596,207
EVI Industries, Inc.		9,066		225,743
Gencor Industries, Inc.(a)		18,389		306,912
Hyliion Holdings Corp., Class A(a)(b)		294,759		518,776
Hyster-Yale Materials Handling, Inc., Class A		20,758		1,332,041
Intevac, Inc.(a)		50,364		193,398
John Bean Technologies Corp.		59,407		6,231,200
Kadant, Inc.		21,808		7,155,205
Kennametal, Inc.		148,723		3,709,152
Mayville Engineering Co., Inc.(a)(b)		21,748		311,649
Nikola Corp.(a)(b)		1,377,166		1,432,253

Security	Shares		Value
Machinery: Industrial (continued)
Omega Flex, Inc.		6,157	$	436,716
Proto Labs, Inc.(a)		48,396		1,730,157
Tennant Co.		34,536		4,199,923
				65,964,155
Machinery: Specialty — 0.1%
Albany International Corp., Class A		58,363		5,457,524
Manufactured Housing(a) — 0.3%
Cavco Industries, Inc.		15,629		6,236,909
Skyline Champion Corp.		100,949		8,581,674
				14,818,583
Marine — 0.1%
Golden Ocean Group Ltd.(a)		229,565		2,975,162
Media — 0.2%
Bumble, Inc., Class A(a)		188,739		2,142,188
Gambling.com Group Ltd.(a)		28,577		260,908
PubMatic, Inc., Class A(a)		77,722		1,843,566
Sinclair, Inc., Class A(b)		62,140		837,026
Townsquare Media, Inc., Class A		21,670		237,936
Urban One, Inc., Class A(a)		12,790		34,533
Urban One, Inc., Class D(a)		18,543		37,828
Vimeo, Inc.(a)		232,955		952,786
ZipRecruiter, Inc., Class A(a)		126,143		1,449,383
				7,796,154
Medical & Dental Instruments & Supplies — 1.4%
Akoya Biosciences, Inc.(a)(b)		40,656		190,677
Alphatec Holdings, Inc.(a)		171,923		2,370,818
AngioDynamics, Inc.(a)		70,684		414,915
Anika Therapeutics, Inc.(a)		27,284		693,014
Artivion, Inc.(a)		73,424		1,553,652
AtriCure, Inc.(a)		86,838		2,641,612
Atrion Corp.		2,566		1,189,469
Avanos Medical, Inc.(a)		86,261		1,717,457
Axogen, Inc.(a)		77,107		622,253
BioLife Solutions, Inc.(a)		66,095		1,226,062
Cerus Corp.(a)		340,372		643,303
Community Health Systems, Inc.(a)		227,855		797,493
CONMED Corp.		57,169		4,578,094
Cutera, Inc.(a)(b)		34,992		51,438
InfuSystem Holdings, Inc.(a)		31,690		271,583
Inmode Ltd.(a)		144,427		3,121,067
LeMaitre Vascular, Inc.		36,815		2,443,043
LivaNova PLC(a)		101,151		5,658,387
Merit Medical Systems, Inc.(a)		106,027		8,031,545
Neogen Corp.(a)(b)		406,323		6,411,777
Ocular Therapeutix, Inc.(a)(b)		215,512		1,961,159
OraSure Technologies, Inc.(a)		135,964		836,179
Orchestra BioMed Holdings, Inc.(a)		24,708		130,211
Organogenesis Holdings, Inc., Class A(a)		128,915		366,119
Orthofix Medical, Inc.(a)		65,993		958,218
OrthoPediatrics Corp.(a)		29,609		863,398
Outset Medical, Inc.(a)		88,207		195,820
Owens & Minor, Inc.(a)		138,475		3,837,142
Patterson Cos., Inc.		155,770		4,307,040
Pulmonx Corp.(a)		70,276		651,459
Sanara Medtech, Inc.(a)		7,363		272,431
Semler Scientific, Inc.(a)		8,215		239,960
STAAR Surgical Co.(a)(b)		91,543		3,504,266
Surmodics, Inc.(a)		24,882		730,038

SERIES  SCHEDULE  OF INVESTMENTS 13

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Medical & Dental Instruments & Supplies (continued)
TransMedics Group, Inc.(a)(b)		59,139	$	4,372,738
Treace Medical Concepts, Inc.(a)		84,401		1,101,433
Utah Medical Products, Inc.		6,597		469,113
				69,424,383
Medical Equipment — 0.9%
Accuray, Inc.(a)		172,305		425,594
AdaptHealth Corp.(a)		178,424		2,053,660
Beyond Air, Inc.(a)(b)		42,993		74,808
CareDx, Inc.(a)		97,026		1,027,505
ClearPoint Neuro, Inc.(a)		43,569		296,269
Cytek Biosciences, Inc.(a)(b)		225,917		1,515,903
Glaukos Corp.(a)(b)		88,442		8,339,196
Haemonetics Corp.(a)		93,515		7,981,505
iRadimed Corp.		14,142		622,107
iRhythm Technologies, Inc.(a)(b)		57,211		6,636,476
KORU Medical Systems, Inc.(a)(b)		63,861		150,712
Lantheus Holdings, Inc.(a)(b)		126,863		7,895,953
Nevro Corp.(a)		67,036		968,000
Quanterix Corp.(a)		66,461		1,565,821
Seer, Inc., Class A(a)		102,718		195,164
SI-BONE, Inc.(a)(b)		74,150		1,213,836
Silk Road Medical, Inc.(a)		71,626		1,312,188
Tactile Systems Technology, Inc.(a)		44,490		722,963
Varex Imaging Corp.(a)		73,107		1,323,237
Zynex, Inc.(a)(b)		32,349		400,157
				44,721,054
Medical Services(a) — 0.0%
Fulgent Genetics, Inc.		38,418		833,671
Innovage Holding Corp.		30,150		133,866
Tela Bio, Inc.(b)		26,671		151,224
				1,118,761
Metal Fabricating — 0.6%
CompX International, Inc.		2,464		84,515
Distribution Solutions Group, Inc.(a)(b)		18,677		662,660
DMC Global, Inc.(a)		37,335		727,659
GrafTech International Ltd.		375,186		517,757
Haynes International, Inc.		23,629		1,420,576
MRC Global, Inc.(a)		156,486		1,967,029
Mueller Industries, Inc.		209,111		11,277,356
Mueller Water Products, Inc., Series A		289,494		4,657,958
Northwest Pipe Co.(a)		18,119		628,367
Worthington Enterprises, Inc.		57,439		3,574,429
Worthington Steel, Inc.		57,439		2,059,188
				27,577,494
Metals & Minerals: Diversified — 1.0%
Alpha Metallurgical Resources, Inc.		21,544		7,134,727
Commercial Metals Co.		218,549		12,844,125
Compass Minerals International, Inc.		63,891		1,005,644
Constellium SE, Class A(a)		240,313		5,313,321
Energy Fuels, Inc./Canada(a)(b)		298,953		1,880,414
Hecla Mining Co.		1,139,799		5,482,433
Intrepid Potash, Inc.(a)		19,595		408,752
Materion Corp.		38,308		5,047,079
Minerals Technologies, Inc.		60,704		4,569,797
Oil-Dri Corp. of America		9,462		705,487
Perpetua Resources Corp.(a)		71,008		295,393
Ring Energy, Inc.(a)(b)		230,505		451,790
SunCoke Energy, Inc.		155,870		1,756,655

Security	Shares		Value
Metals & Minerals: Diversified (continued)
U.S. Lime & Minerals, Inc.		3,866	$	1,152,609
U.S. Silica Holdings, Inc.(a)		140,576		1,744,548
				49,792,774
Metals & Mining — 0.0%
Contango ORE, Inc.(a)(b)		7,011		139,168
i-80 Gold Corp.(a)(b)		386,561		517,992
Ramaco Resources, Inc., Class A		42,345		713,090
Ramaco Resources, Inc., Class B		7,704		96,685
				1,466,935
Mining(a) — 0.0%
5E Advanced Materials, Inc.(b)		68,231		91,429
Dakota Gold Corp.		103,435		245,141
Piedmont Lithium, Inc.		31,943		425,481
				762,051
Office Supplies & Equipment — 0.2%
ACCO Brands Corp.		172,844		969,655
Eastman Kodak Co.(a)(b)		109,400		541,530
HNI Corp.		86,140		3,887,498
MillerKnoll, Inc.		137,639		3,407,942
Pitney Bowes, Inc.		200,937		870,057
Steelcase, Inc., Class A		172,807		2,260,316
				11,936,998
Oil & Gas Producers — 0.4%
Civitas Resources, Inc.		150,833		11,449,733
Crescent Energy Co., Class A		143,745		1,710,566
HighPeak Energy, Inc.		24,090		379,899
Kosmos Energy Ltd.(a)		851,517		5,075,041
				18,615,239
Oil Well Equipment & Services — 1.2%
Bristow Group, Inc.(a)		44,051		1,198,187
Cactus, Inc., Class A		122,205		6,121,249
ChampionX Corp.		365,250		13,108,823
Dril-Quip, Inc.(a)		63,463		1,429,821
Helix Energy Solutions Group, Inc.(a)		268,368		2,909,109
Helmerich & Payne, Inc.		181,636		7,639,610
Liberty Energy, Inc., Class A		306,469		6,350,038
Nabors Industries Ltd.(a)		17,088		1,471,789
Newpark Resources, Inc.(a)		140,927		1,017,493
Oceaneering International, Inc.(a)		187,440		4,386,096
Oil States International, Inc.(a)		118,619		730,693
Patterson-UTI Energy, Inc.		659,583		7,875,421
ProPetro Holding Corp.(a)		176,026		1,422,290
RPC, Inc.		158,605		1,227,603
Select Water Solutions, Inc., Class A		148,935		1,374,670
Solaris Oilfield Infrastructure, Inc., Class A		53,881		467,148
TETRA Technologies, Inc.(a)		233,657		1,035,101
				59,765,141
Oil, Gas & Consumable Fuels — 0.6%
Archrock, Inc.		259,330		5,101,021
Ardmore Shipping Corp.		77,842		1,278,166
DHT Holdings, Inc.		252,702		2,906,073
Dorian LPG Ltd.		64,312		2,473,440
Empire Petroleum Corp.(a)		25,444		130,019
Encore Energy Corp.(a)		304,684		1,334,516
Excelerate Energy, Inc., Class A		34,227		548,317
FLEX LNG Ltd.(a)		55,559		1,412,865
Granite Ridge Resources, Inc.		62,687		407,465
Gulfport Energy Corp.(a)		20,394		3,265,487
Noble Corp. PLC		210,079		10,186,731
ProFrac Holding Corp., Class A(a)(b)		47,256		395,060

14

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Oil, Gas & Consumable Fuels (continued)
VAALCO Energy, Inc.		197,571	$	1,377,070
Vertex Energy, Inc.(a)		117,445		164,423
Vitesse Energy, Inc.		46,743		1,109,211
				32,089,864
Oil: Crude Producers — 1.8%
Amplify Energy Corp.(a)		74,116		489,907
Berry Corp.		140,994		1,135,002
California Resources Corp.		129,958		7,160,686
Chord Energy Corp.		78,067		13,914,662
CNX Resources Corp.(a)(b)		292,197		6,930,913
Comstock Resources, Inc.		171,448		1,591,037
CVR Energy, Inc.		55,290		1,971,641
Evolution Petroleum Corp.		58,871		361,468
Gevo, Inc.(a)(b)		415,762		319,596
Magnolia Oil & Gas Corp., Class A		329,909		8,561,138
Murphy Oil Corp.		271,207		12,394,160
Northern Oil and Gas, Inc.		164,183		6,514,781
ONE Gas, Inc.		102,972		6,644,783
Overseas Shipholding Group, Inc., Class A		109,969		703,802
PrimeEnergy Resources Corp.(a)		1,464		146,766
Riley Exploration Permian, Inc.		17,227		568,491
SandRidge Energy, Inc.		33,568		489,086
SilverBow Resources, Inc.(a)		43,473		1,484,168
SM Energy Co.		216,136		10,774,380
Talos Energy, Inc.(a)		259,488		3,614,668
Tellurian, Inc.(a)(b)		1,090,083		720,981
Vital Energy, Inc.(a)		43,550		2,288,117
W&T Offshore, Inc.		200,065		530,172
				89,310,405
Oil: Refining & Marketing — 0.5%
Clean Energy Fuels Corp.(a)		320,598		859,203
Delek U.S. Holdings, Inc.		118,378		3,638,940
Par Pacific Holdings, Inc.(a)		103,074		3,819,922
PBF Energy, Inc., Class A		205,808		11,848,366
World Kinect Corp.		111,477		2,948,567
				23,114,998
Paints & Coatings — 0.2%
HB Fuller Co.		100,936		8,048,637
Kronos Worldwide, Inc.		43,272		510,609
				8,559,246
Paper — 0.1%
Clearwater Paper Corp.(a)		30,475		1,332,672
Glatfelter Corp.(a)		77,419		154,838
Mativ Holdings, Inc.		100,124		1,877,325
				3,364,835
Paper & Forest Products — 0.1%
Sylvamo Corp.		66,794		4,123,862
Personal Care — 0.6%
Beauty Health Co., Class A(a)		156,398		694,407
BellRing Brands, Inc.(a)		246,085		14,526,398
Edgewell Personal Care Co.		92,943		3,591,318
Nu Skin Enterprises, Inc., Class A		92,974		1,285,830
Sterling Check Corp.(a)		56,977		916,190
USANA Health Sciences, Inc.(a)		21,195		1,027,958
WD-40 Co.		25,327		6,415,582
				28,457,683
Personal Products — 0.0%
Herbalife Ltd.(a)		184,320		1,852,416

Security	Shares		Value
Pharmaceuticals — 2.0%
ACADIA Pharmaceuticals, Inc.(a)		228,598	$	4,226,777
Aclaris Therapeutics, Inc.(a)		123,478		153,113
Alkermes PLC(a)		309,294		8,372,589
Amneal Pharmaceuticals, Inc., Class A(a)		227,674		1,379,704
Amphastar Pharmaceuticals, Inc.(a)		70,402		3,091,352
Arrowhead Pharmaceuticals, Inc.(a)(b)		216,470		6,191,042
Assertio Holdings, Inc.(a)(b)		169,034		162,154
Atea Pharmaceuticals, Inc.(a)		146,690		592,628
Axonics, Inc.(a)		92,740		6,396,278
Axsome Therapeutics, Inc.(a)		66,453		5,302,949
Biote Corp., Class A(a)		26,839		155,666
Bright Green Corp.(a)(b)		94,164		22,938
Cassava Sciences, Inc.(a)(b)		74,998		1,521,709
Citius Pharmaceuticals, Inc.(a)(b)		200,965		180,326
Corcept Therapeutics, Inc.(a)		151,815		3,824,220
CorMedix, Inc.(a)(b)		99,843		423,334
Eagle Pharmaceuticals, Inc.(a)(b)		17,753		93,026
Edgewise Therapeutics, Inc.(a)		107,483		1,960,490
Enanta Pharmaceuticals, Inc.(a)		37,581		656,164
Enliven Therapeutics, Inc.(a)(b)		42,665		750,477
Evolus, Inc.(a)(b)		78,193		1,094,702
Eyenovia, Inc.(a)(b)		44,656		44,031
Harmony Biosciences Holdings, Inc.(a)		60,089		2,017,789
Harrow, Inc.(a)(b)		56,504		747,548
Ikena Oncology, Inc.(a)(b)		76,095		108,055
Innoviva, Inc.(a)(b)		108,770		1,657,655
Intra-Cellular Therapies, Inc.(a)		174,662		12,086,610
Ironwood Pharmaceuticals, Inc., Class A(a)		258,397		2,250,638
Liquidia Corp.(a)		93,824		1,383,904
Longboard Pharmaceuticals, Inc.(a)		46,454		1,003,406
Neumora Therapeutics, Inc.(a)		26,998		371,223
Nuvation Bio, Inc., Class A(a)		271,541		988,409
Optinose, Inc.(a)		146,940		214,532
Pacira BioSciences, Inc.(a)		84,915		2,481,216
PetIQ, Inc., Class A(a)		51,992		950,414
Prestige Consumer Healthcare, Inc.(a)		92,910		6,741,550
Revance Therapeutics, Inc.(a)		164,235		808,036
scPharmaceuticals, Inc.(a)(b)		49,478		248,380
SIGA Technologies, Inc.		86,992		744,652
Supernus Pharmaceuticals, Inc.(a)(b)		91,622		3,125,226
Syndax Pharmaceuticals, Inc.(a)		146,870		3,495,506
Taro Pharmaceutical Industries Ltd.(a)		14,816		627,309
Tarsus Pharmaceuticals, Inc.(a)(b)		54,283		1,973,187
Terns Pharmaceuticals, Inc.(a)		84,596		554,950
TG Therapeutics, Inc.(a)(b)		258,481		3,931,496
Theravance Biopharma, Inc.(a)		92,048		825,671
Third Harmonic Bio, Inc.(a)		37,467		353,688
Trevi Therapeutics, Inc.(a)		76,979		265,578
Ventyx Biosciences, Inc.(a)		91,731		504,521
Voyager Therapeutics, Inc.(a)		73,364		683,019
Xeris Biopharma Holdings, Inc.(a)		259,973		574,540
				98,314,377
Photography — 0.0%
GoPro, Inc., Class A(a)		225,473		502,805
Power Transmission Equipment — 0.2%
Advanced Energy Industries, Inc.(b)		70,170		7,155,937
Babcock & Wilcox Enterprises, Inc.(a)		106,657		120,522
Powell Industries, Inc.		17,276		2,458,375
Vicor Corp.(a)		41,360		1,581,606
				11,316,440

SERIES  SCHEDULE  OF INVESTMENTS 15

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Printing & Copying Services(a) — 0.3%
Casella Waste Systems, Inc., Class A		105,319	$	10,412,889
Cimpress PLC		33,586		2,972,697
				13,385,586
Producer Durables: Miscellaneous — 0.0%
First Advantage Corp.		100,823		1,635,349
Park-Ohio Holdings Corp.		15,499		413,513
Solo Brands, Inc., Class A(a)(b)		38,288		83,085
				2,131,947
Production Technology Equipment(a) — 0.8%
ACM Research, Inc., Class A		91,196		2,657,451
Axcelis Technologies, Inc.		60,798		6,780,193
Cohu, Inc.		87,081		2,902,410
HireRight Holdings Corp.		24,458		349,016
Ichor Holdings Ltd.		53,823		2,078,644
Maxeon Solar Technologies Ltd.(b)		53,293		177,466
Onto Innovation, Inc.(b)		91,354		16,542,382
Photronics, Inc.		113,873		3,224,883
Ultra Clean Holdings, Inc.		82,957		3,811,045
Veeco Instruments, Inc.(b)		94,834		3,335,312
				41,858,802
Professional Services(a) — 0.3%
Alight, Inc., Class A		772,815		7,612,227
BlackSky Technology, Inc., Class A		240,541		327,136
FiscalNote Holdings, Inc., Class A		107,542		143,031
Innodata, Inc.(b)		47,865		315,909
Legalzoom.com, Inc.(b)		249,420		3,327,263
Planet Labs PBC, Class A(b)		335,025		854,314
Skillsoft Corp., Class A(b)		7,248		65,232
				12,645,112
Publishing — 0.1%
Daily Journal Corp.(a)		2,594		938,016
Gannett Co., Inc.(a)(b)		278,093		678,547
John Wiley & Sons, Inc., Class A		67,134		2,559,819
Scholastic Corp.		47,970		1,808,949
				5,985,331
Radio & TV Broadcasters — 0.1%
Entravision Communications Corp., Class A		112,738		184,890
Gray Television, Inc.		157,579		995,899
iHeartMedia, Inc., Class A(a)		186,275		389,315
TEGNA, Inc.		368,349		5,503,134
				7,073,238
Railroad Equipment — 0.1%
Greenbrier Cos., Inc.		56,939		2,966,522
Trinity Industries, Inc.		151,457		4,218,077
				7,184,599
Real Estate — 0.4%
Anywhere Real Estate, Inc.(a)		201,080		1,242,674
Cushman & Wakefield PLC(a)		254,184		2,658,765
eXp World Holdings, Inc.		132,948		1,373,353
Kennedy-Wilson Holdings, Inc.		223,229		1,915,305
Newmark Group, Inc., Class A		253,011		2,805,892
Opendoor Technologies, Inc.(a)		1,053,355		3,191,666
Redfin Corp.(a)(b)		206,204		1,371,256
RMR Group, Inc., Class A		29,180		700,320
St. Joe Co.		64,238		3,723,877

Security	Shares		Value
Real Estate (continued)
Stratus Properties, Inc.(a)		9,109	$	207,958
Tejon Ranch Co.(a)		40,607		625,754
				19,816,820
Real Estate Investment Trusts (REITs) — 5.5%
Acadia Realty Trust		187,329		3,186,466
AFC Gamma, Inc.		32,145		397,955
Alexander & Baldwin, Inc.		135,276		2,227,996
Alexander’s, Inc.		4,051		879,634
Alpine Income Property Trust, Inc.		22,727		347,269
American Assets Trust, Inc.		91,038		1,994,643
Angel Oak Mortgage REIT, Inc., Series 13A		23,255		249,759
Apartment Investment and Management Co., Class A(a)		268,955		2,202,741
Apollo Commercial Real Estate Finance, Inc.		264,830		2,950,206
Apple Hospitality REIT, Inc.		402,236		6,588,626
Arbor Realty Trust, Inc.(b)		285,682		3,785,287
Ares Commercial Real Estate Corp.		98,657		734,995
Armada Hoffler Properties, Inc.		125,649		1,306,750
ARMOUR Residential REIT, Inc.		91,690		1,812,711
Blackstone Mortgage Trust, Inc., Class A		321,438		6,399,831
Braemar Hotels & Resorts, Inc.		116,745		233,490
Brandywine Realty Trust		317,413		1,523,582
BrightSpire Capital, Inc., Class A		240,280		1,655,529
Broadstone Net Lease, Inc.		350,686		5,495,250
BRT Apartments Corp.		21,875		367,500
CareTrust REIT, Inc.		223,633		5,449,936
CBL & Associates Properties, Inc.		50,180		1,149,624
Centerspace		28,189		1,610,719
Chatham Lodging Trust		89,897		908,859
Chicago Atlantic Real Estate Finance, Inc.		31,902		503,095
Chimera Investment Corp.		424,274		1,955,903
City Office REIT, Inc.		65,402		340,744
Claros Mortgage Trust, Inc.		169,282		1,652,192
Clipper Realty, Inc.		23,302		112,549
Community Healthcare Trust, Inc.		49,771		1,321,420
COPT Defense Properties		210,355		5,084,280
CoreCivic, Inc.(a)		212,079		3,310,553
CTO Realty Growth, Inc.		39,929		676,797
DiamondRock Hospitality Co.		392,245		3,769,474
Diversified Healthcare Trust		445,603		1,096,183
Douglas Emmett, Inc.		165,902		2,301,061
Dynex Capital, Inc.		105,279		1,310,724
Easterly Government Properties, Inc.		178,782		2,057,781
Ellington Financial, Inc.		140,179		1,655,514
Elme Communities		163,937		2,282,003
Empire State Realty Trust, Inc., Class A		246,374		2,495,769
Equity Commonwealth(a)		190,415		3,595,035
Essential Properties Realty Trust, Inc.		290,953		7,756,807
Farmland Partners, Inc.		84,398		936,818
Four Corners Property Trust, Inc.		168,767		4,129,729
Franklin BSP Realty Trust, Inc.		155,057		2,071,562
GEO Group, Inc.(a)		224,673		3,172,383
Getty Realty Corp.		89,032		2,435,025
Gladstone Commercial Corp.		75,719		1,047,951
Gladstone Land Corp.		63,140		842,288
Global Medical REIT, Inc.		115,299		1,008,866
Global Net Lease, Inc.		363,044		2,820,852
Granite Point Mortgage Trust, Inc.		93,415		445,590
Hannon Armstrong Sustainable Infrastructure Capital, Inc.		204,858		5,817,967

16

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Real Estate Investment Trusts (REITs) (continued)
Hudson Pacific Properties, Inc.		257,612	$	1,661,597
Independence Realty Trust, Inc.		420,907		6,789,230
Innovative Industrial Properties, Inc.		52,091		5,393,502
InvenTrust Properties Corp.		126,816		3,260,439
Invesco Mortgage Capital, Inc.		91,143		882,264
JBG SMITH Properties		164,602		2,641,862
Kite Realty Group Trust		406,153		8,805,397
KKR Real Estate Finance Trust, Inc.		109,856		1,105,151
Ladder Capital Corp., Class A		211,246		2,351,168
LTC Properties, Inc.		76,495		2,486,852
LXP Industrial Trust		540,518		4,875,472
MFA Financial, Inc.		190,811		2,177,154
National Health Investors, Inc.		77,874		4,892,823
New York Mortgage Trust, Inc.		167,168		1,203,610
NexPoint Diversified Real Estate Trust		56,579		373,421
Nexpoint Real Estate Finance, Inc.		14,959		214,811
NexPoint Residential Trust, Inc.		42,093		1,354,974
Office Properties Income Trust		89,332		182,237
One Liberty Properties, Inc.		29,385		663,807
Orchid Island Capital, Inc.(b)		96,218		859,227
Orion Office REIT, Inc.		106,467		373,699
Outfront Media, Inc.		275,266		4,621,716
Paramount Group, Inc.		345,063		1,618,345
Peakstone Realty Trust, Class E		67,715		1,092,243
Pebblebrook Hotel Trust		221,789		3,417,769
PennyMac Mortgage Investment Trust		162,141		2,380,230
Phillips Edison & Co., Inc.		224,453		8,051,129
Piedmont Office Realty Trust, Inc., Class A		230,345		1,619,325
Plymouth Industrial REIT, Inc.		85,130		1,915,425
Postal Realty Trust, Inc., Class A		38,059		545,005
PotlatchDeltic Corp.		147,596		6,939,964
Ready Capital Corp.		298,759		2,727,670
Redwood Trust, Inc.		245,661		1,564,861
Retail Opportunity Investments Corp.		229,616		2,943,677
RLJ Lodging Trust		286,016		3,380,709
Sabra Health Care REIT, Inc.		431,803		6,377,730
Safehold, Inc.		90,749		1,869,429
Saul Centers, Inc.		22,362		860,713
Service Properties Trust		307,603		2,085,548
SL Green Realty Corp.		120,536		6,645,150
Star Holdings(a)(b)		25,185		325,390
Summit Hotel Properties, Inc.		195,464		1,272,471
Sunstone Hotel Investors, Inc.		383,416		4,271,254
Tanger, Inc.		195,146		5,762,661
Terreno Realty Corp.		157,338		10,447,243
TPG RE Finance Trust, Inc.		129,250		997,810
Two Harbors Investment Corp.		193,666		2,564,138
UMH Properties, Inc.		113,548		1,844,020
Uniti Group, Inc.		444,344		2,621,630
Universal Health Realty Income Trust		24,178		887,574
Urban Edge Properties		214,325		3,701,393
Veris Residential, Inc.		147,570		2,244,540
Whitestone REIT		90,717		1,138,498
Xenia Hotels & Resorts, Inc.		196,940		2,956,069
				275,706,299
Real Estate Management & Development — 0.2%
American Realty Investors, Inc.(a)		2,389		42,811
Compass, Inc., Class A(a)(b)		530,901		1,911,243

Security	Shares		Value
Real Estate Management & Development (continued)
DigitalBridge Group, Inc., Class A		301,788	$	5,815,455
Forestar Group, Inc.(a)		34,166		1,373,131
Maui Land & Pineapple Co., Inc.(a)		13,156		284,959
Transcontinental Realty Investors, Inc.(a)		2,184		82,228
				9,509,827
Recreational Vehicles & Boats — 0.3%
Camping World Holdings, Inc., Class A		77,965		2,171,325
Lazydays Holdings, Inc.(a)(b)		13,605		54,828
LCI Industries		46,102		5,673,312
Malibu Boats, Inc., Class A(a)		37,925		1,641,394
Marine Products Corp.		14,954		175,710
MasterCraft Boat Holdings, Inc.(a)		30,695		728,085
Winnebago Industries, Inc.		52,952		3,918,448
				14,363,102
Rental & Leasing Services: Consumer — 0.1%
Upbound Group, Inc.		99,782		3,513,324
Restaurants — 0.9%
Biglari Holdings, Inc., Class B(a)		1,350		256,068
BJ’s Restaurants, Inc.(a)		41,910		1,516,304
Bloomin’ Brands, Inc.		163,478		4,688,549
Brinker International, Inc.(a)		81,814		4,064,519
Carrols Restaurant Group, Inc.		63,560		604,456
Cheesecake Factory, Inc.		89,085		3,220,423
Cracker Barrel Old Country Store, Inc.		41,152		2,992,985
Dave & Buster’s Entertainment, Inc.(a)(b)		63,128		3,951,813
Denny’s Corp.(a)		97,143		870,401
Dine Brands Global, Inc.		28,860		1,341,413
El Pollo Loco Holdings, Inc.(a)		52,290		509,305
Jack in the Box, Inc.		36,768		2,517,873
Kura Sushi USA, Inc., Class A(a)(b)		10,877		1,252,595
Nathan’s Famous, Inc.		4,919		348,265
Noodles & Co., Class A(a)		67,772		129,444
ONE Group Hospitality, Inc.(a)		38,498		214,434
Papa John’s International, Inc.		61,320		4,083,912
Potbelly Corp.(a)		47,663		577,199
Red Robin Gourmet Burgers, Inc.(a)		27,221		208,513
Rush Street Interactive, Inc., Class A(a)		123,118		801,498
Shake Shack, Inc., Class A(a)		70,444		7,328,289
Sweetgreen, Inc., Class A(a)		182,428		4,608,131
				46,086,389
Scientific Instruments: Control & Filter — 0.7%
Arlo Technologies, Inc.(a)		166,906		2,111,361
Energy Recovery, Inc.(a)		103,879		1,640,250
ESCO Technologies, Inc.		47,767		5,113,457
Gorman-Rupp Co.		42,700		1,688,785
Helios Technologies, Inc.		61,865		2,764,747
Napco Security Technologies, Inc.		61,921		2,486,748
Resideo Technologies, Inc.(a)		273,198		6,125,099
Thermon Group Holdings, Inc.(a)		62,349		2,040,059
Watts Water Technologies, Inc., Class A		51,026		10,845,576
				34,816,082
Scientific Instruments: Electrical — 0.7%
Allient, Inc.		24,391		870,271
Atkore, Inc.		69,463		13,222,977
AZZ, Inc.		46,283		3,578,139
EnerSys		76,118		7,190,106

SERIES  SCHEDULE  OF INVESTMENTS 17

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Scientific Instruments: Electrical (continued)
Franklin Electric Co., Inc.		86,161	$	9,202,856
FTC Solar, Inc.(a)(b)		109,681		59,118
Preformed Line Products Co.		4,418		568,464
				34,691,931
Scientific Instruments: Gauges & Meters — 0.4%
Badger Meter, Inc.		54,877		8,879,647
FARO Technologies, Inc.(a)		36,540		785,975
Itron, Inc.(a)		84,972		7,861,610
Mesa Laboratories, Inc.		9,663		1,060,321
Transcat, Inc.(a)		15,291		1,703,876
Vishay Precision Group, Inc.(a)		22,635		799,695
				21,091,124
Scientific Instruments: Pollution Control — 0.0%
CECO Environmental Corp.(a)		55,354		1,274,249
Securities Brokerage & Services — 0.1%
StoneX Group, Inc.(a)		50,557		3,552,135
Semiconductors & Components — 1.6%
Alpha & Omega Semiconductor Ltd.(a)		43,648		962,002
Amkor Technology, Inc.		209,947		6,768,691
Atomera, Inc.(a)(b)		45,543		280,545
CEVA, Inc.(a)		43,343		984,320
Diodes, Inc.(a)		84,244		5,939,202
FormFactor, Inc.(a)(b)		143,915		6,566,841
Kulicke & Soffa Industries, Inc.		103,524		5,208,292
MACOM Technology Solutions Holdings, Inc., Class H(a)(b)		103,358		9,885,159
MaxLinear, Inc.(a)		141,854		2,648,414
Power Integrations, Inc.		105,967		7,581,939
Rambus, Inc.(a)(b)		200,931		12,419,545
Semtech Corp.(a)		119,259		3,278,430
Silicon Laboratories, Inc.(a)		59,235		8,513,254
SiTime Corp.(a)		33,118		3,087,591
SkyWater Technology, Inc.(a)		34,959		355,533
SMART Global Holdings, Inc.(a)		96,233		2,532,853
Vishay Intertechnology, Inc.		237,254		5,380,921
				82,393,532
Semiconductors & Semiconductor Equipment(a) — 0.3%
Aehr Test Systems		51,753		641,737
Ambarella, Inc.		71,916		3,651,176
Credo Technology Group Holding Ltd.		231,795		4,911,736
indie Semiconductor, Inc., Class A(b)		280,849		1,988,411
inTEST Corp.		22,426		297,145
Navitas Semiconductor Corp.		211,103		1,006,961
Transphorm, Inc.		55,876		274,351
				12,771,517
Shipping — 1.0%
A-Mark Precious Metals, Inc.		35,005		1,074,303
Eagle Bulk Shipping, Inc.		17,256		1,077,982
Genco Shipping & Trading Ltd.		78,491		1,595,722
Golar LNG Ltd.		184,697		4,443,810
Himalaya Shipping Ltd.		57,729		445,091
International Seaways, Inc.		75,771		4,031,017
Matson, Inc.		64,378		7,236,087
Nordic American Tankers Ltd.		382,765		1,500,439
Pangaea Logistics Solutions Ltd.		70,793		493,427
Safe Bulkers, Inc.		124,396		617,004
Scorpio Tankers, Inc.		89,083		6,373,889
SFL Corp. Ltd.		214,743		2,830,313
SITE Centers Corp.		355,563		5,208,998

Security	Shares		Value
Shipping (continued)
Teekay Corp.(a)(b)		117,575	$	855,946
Teekay Tankers Ltd., Class A		44,598		2,604,969
Tidewater, Inc.(a)(b)		86,619		7,968,948
				48,357,945
Software — 1.2%
Amplitude, Inc., Class A(a)		128,186		1,394,664
AvePoint, Inc., Class A(a)(b)		276,940		2,193,365
AvidXchange Holdings, Inc.(a)		281,515		3,701,922
Bit Digital, Inc.(a)		168,825		484,528
Braze, Inc., Class A(a)		99,735		4,418,260
C3.ai, Inc., Class A(a)(b)		153,953		4,167,508
Cipher Mining, Inc.(a)(b)		74,178		382,017
Clear Secure, Inc., Class A		154,980		3,296,425
Consensus Cloud Solutions, Inc.(a)		34,848		552,689
Couchbase, Inc.(a)(b)		66,242		1,742,827
CS Disco, Inc.(a)		45,301		368,297
CXApp, Inc., Class A(a)(b)		3,143		7,700
Enfusion, Inc., Class A(a)		73,897		683,547
EverCommerce, Inc.(a)		43,674		411,409
Expensify, Inc., Class A(a)		94,809		174,449
Freshworks, Inc., Class A(a)		302,188		5,502,843
Instructure Holdings, Inc.(a)		37,118		793,583
Intapp, Inc.(a)		74,289		2,548,113
Jamf Holding Corp.(a)		131,864		2,419,704
Kaltura, Inc.(a)		151,352		204,325
MarketWise, Inc., Class A		63,484		109,827
MeridianLink, Inc.(a)		46,932		877,628
Model N, Inc.(a)		71,995		2,049,698
N-able, Inc.(a)		130,437		1,704,812
NextNav, Inc.(a)(b)		103,769		682,800
Olo, Inc., Class A(a)		192,858		1,058,790
Qualys, Inc.(a)		69,388		11,578,776
SEMrush Holdings, Inc., Class A(a)		57,839		766,945
SoundHound AI, Inc., Class A(a)(b)		257,326		1,515,650
Sprinklr, Inc., Class A(a)		196,958		2,416,675
Terawulf, Inc.(a)(b)		287,028		754,884
Weave Communications, Inc.(a)		64,807		743,984
Zeta Global Holdings Corp., Class A(a)		261,950		2,863,114
				62,571,758
Specialty Retail — 2.3%
1-800-Flowers.com, Inc., Class A(a)		49,721		538,478
Aaron’s Co., Inc.		54,498		408,735
Abercrombie & Fitch Co., Class A(a)		91,055		11,411,923
Academy Sports & Outdoors, Inc.		134,906		9,111,551
Alta Equipment Group, Inc., Class A		42,374		548,743
American Eagle Outfitters, Inc.		340,839		8,790,238
America’s Car-Mart, Inc.(a)		11,271		719,879
Arko Corp., Class A		145,236		827,845
Asbury Automotive Group, Inc.(a)		38,626		9,107,238
Big 5 Sporting Goods Corp.		39,098		137,625
Blink Charging Co.(a)(b)		112,545		338,761
Boot Barn Holdings, Inc.(a)(b)		56,366		5,363,225
Buckle, Inc.		56,969		2,294,142
Build-A-Bear Workshop, Inc.		23,386		698,540
Caleres, Inc.		63,364		2,599,825
Carvana Co., Class A(a)		192,400		16,913,884
Cato Corp., Class A		33,287		192,066
Children’s Place, Inc.(a)		22,053		254,492
Designer Brands, Inc., Class A		78,465		857,623
Destination XL Group, Inc.(a)		110,577		398,077
Envela Corp.(a)(b)		16,538		76,406

18

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Specialty Retail (continued)
EVgo, Inc., Class A(a)(b)		185,400	$	465,354
Foot Locker, Inc.		153,166		4,365,231
Genesco, Inc.(a)		19,699		554,330
Group 1 Automotive, Inc.(b)		25,467		7,442,221
Guess?, Inc.		52,466		1,651,105
Haverty Furniture Cos., Inc.		27,286		930,998
Hibbett, Inc.		21,661		1,663,781
J Jill, Inc.(a)		8,481		271,138
Lands’ End, Inc.(a)		26,544		289,064
Leslie’s, Inc.(a)(b)		331,268		2,153,242
MarineMax, Inc.(a)		40,651		1,352,052
Monro, Inc.		55,346		1,745,613
National Vision Holdings, Inc.(a)		144,852		3,209,920
ODP Corp.(a)		59,494		3,156,157
OneWater Marine, Inc., Class A(a)(b)		21,028		591,938
Sally Beauty Holdings, Inc.(a)		200,162		2,486,012
Shoe Carnival, Inc.		33,977		1,244,917
Sonic Automotive, Inc., Class A		27,346		1,557,081
Sportsman’s Warehouse Holdings, Inc.(a)		71,772		223,211
Tilly’s, Inc., Class A(a)		41,556		282,581
Torrid Holdings, Inc.(a)		20,346		99,289
Urban Outfitters, Inc.(a)		119,038		5,168,630
Warby Parker, Inc., Class A(a)		160,499		2,184,391
Zumiez, Inc.(a)		30,799		467,837
				115,145,389
Steel — 0.5%
ATI, Inc.(a)		240,589		12,310,939
Carpenter Technology Corp.		91,268		6,518,361
Ivanhoe Electric, Inc.(a)(b)		119,341		1,169,542
Olympic Steel, Inc.		18,385		1,303,129
Radius Recycling, Inc., Class A		48,973		1,034,799
Ryerson Holding Corp.		52,462		1,757,477
TimkenSteel Corp.(a)		79,750		1,774,437
				25,868,684
Technology Hardware & Equipment — 0.1%
CompoSecure, Inc., Class A(a)(b)		34,234		247,512
CPI Card Group, Inc.(a)(b)		6,890		123,055
IonQ, Inc.(a)(b)		305,294		3,049,887
Xerox Holdings Corp.		218,196		3,905,709
				7,326,163
Technology: Miscellaneous — 0.5%
Benchmark Electronics, Inc.		65,965		1,979,610
CTS Corp.		57,786		2,703,807
Fabrinet(a)		68,660		12,978,113
Kimball Electronics, Inc.(a)		44,862		971,262
Plexus Corp.(a)		51,199		4,854,689
				23,487,481
Telecommunications Equipment(a) — 0.1%
Akoustis Technologies, Inc.		128,450		75,927
Cambium Networks Corp.		20,578		88,691
Clearfield, Inc.(b)		23,275		717,801
Knowles Corp.		165,627		2,666,595
Viavi Solutions, Inc.		412,660		3,751,079
				7,300,093
Textile Products — 0.0%
Interface, Inc., Class A		106,917		1,798,344
Textiles Apparel & Shoes — 0.5%
Fossil Group, Inc.(a)(b)		95,290		97,196
G-III Apparel Group Ltd.(a)		77,058		2,235,452

Security	Shares		Value
Textiles Apparel & Shoes (continued)
Hanesbrands, Inc.(a)		656,453	$	3,807,427
Kontoor Brands, Inc.		104,829		6,315,947
Oxford Industries, Inc.		27,929		3,139,220
Rocky Brands, Inc.		14,077		381,909
Steven Madden Ltd.		137,813		5,826,734
Vera Bradley, Inc.(a)		49,511		336,675
Weyco Group, Inc.		10,748		342,646
Wolverine World Wide, Inc.		144,914		1,624,486
				24,107,692
Textiles, Apparel & Luxury Goods — 0.0%
Allbirds, Inc., Class A(a)(b)		158,101		109,738
Toys — 0.0%
Funko, Inc., Class A(a)(b)		69,079		431,053
Trading Companies & Distributors — 0.0%
Hudson Technologies, Inc.(a)		81,800		900,618
Transportation Miscellaneous — 0.1%
Costamare, Inc.		87,413		992,137
Hub Group, Inc., Class A		117,249		5,067,502
				6,059,639
Truckers — 0.5%
ArcBest Corp.		44,398		6,326,715
Covenant Logistics Group, Inc., Class A		15,889		736,614
Daseke, Inc.(a)		85,128		706,563
Forward Air Corp.		48,008		1,493,529
FRP Holdings, Inc.(a)		12,298		755,097
FTAI Infrastructure, Inc.		184,655		1,159,634
Heartland Express, Inc.		87,468		1,044,368
Marten Transport Ltd.		108,340		2,002,123
PAM Transportation Services, Inc.(a)		9,854		159,733
RXO, Inc.(a)		216,769		4,740,738
Universal Logistics Holdings, Inc.		12,956		477,688
Werner Enterprises, Inc.		118,111		4,620,502
				24,223,304
Utilities: Electrical — 1.0%
ALLETE, Inc.		107,818		6,430,266
Avista Corp.		144,636		5,065,153
Black Hills Corp.		127,536		6,963,466
Genie Energy Ltd., Class B		38,673		583,189
MGE Energy, Inc.		68,065		5,358,077
Northwestern Energy Group, Inc.		114,993		5,856,593
Otter Tail Corp.		77,015		6,654,096
PNM Resources, Inc.		159,936		6,019,991
Portland General Electric Co.		189,651		7,965,342
Unitil Corp.		29,750		1,557,412
				52,453,585
Utilities: Gas Distributors — 0.6%
Chesapeake Utilities Corp.		40,790		4,376,767
New Jersey Resources Corp.		181,325		7,780,655
Northwest Natural Holding Co.		68,500		2,549,570
RGC Resources, Inc.		14,637		296,253
Southwest Gas Holdings, Inc.		116,437		8,864,349
Spire, Inc.		97,400		5,977,438
				29,845,032
Utilities: Miscellaneous — 0.3%
Brookfield Infrastructure Corp., Class A		223,608		8,058,833
Ormat Technologies, Inc.		100,849		6,675,195
				14,734,028

SERIES  SCHEDULE  OF INVESTMENTS 19

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series (Percentages shown are based on Net Assets)

Security	Shares		Value
Utilities: Telecommunications — 0.4%
8x8, Inc.(a)(b)		230,061	$	621,165
ATN International, Inc.		19,607		617,719
Cogent Communications Holdings, Inc.		81,654		5,334,456
Consolidated Communications Holdings, Inc.(a)		145,164		627,109
Globalstar, Inc.(a)		1,350,513		1,985,254
IDT Corp., Class B		28,587		1,080,874
Shenandoah Telecommunications Co.		90,606		1,573,826
Spok Holdings, Inc.		32,304		515,249
Telephone and Data Systems, Inc.		184,558		2,956,619
Xperi, Inc.(a)		80,973		976,534
Ziff Davis, Inc.(a)		85,386		5,382,733
				21,671,538
Utilities: Water — 0.4%
American States Water Co.		69,126		4,993,662
Artesian Resources Corp., Class A		16,723		620,591
California Water Service Group		107,813		5,011,148
Consolidated Water Co. Ltd.		28,246		827,890
Global Water Resources, Inc.		19,053		244,641
Middlesex Water Co.		32,688		1,716,120
Pure Cycle Corp.(a)		35,602		338,219
SJW Group		59,546		3,369,708
York Water Co.		26,861		974,248
				18,096,227
Total Common Stocks — 98.2% (Cost: $3,783,237,477)				4,941,252,734
Investment Companies
Equity Funds — 0.6%
iShares Russell 2000 ETF(e)(f)		144,399		30,367,110
Total Investment Companies — 0.6% (Cost: $28,072,517)				30,367,110
Rights
Biotechnology — 0.0%
Aduro Biotech, Inc., CVR(d)		21,953		10,977

Security	Shares		Value
Biotechnology (continued)
AstraZeneca, CVR		48,841	$	15,140
Chinook Therapeutics, CVR(d)		100,285		44,125
GTx, Inc., CVR(b)(d)		944		968
				71,210
Oil, Gas & Consumable Fuels — 0.0%
Empire Petroleum Corp. PIPE, (Expires: 04/10/24, Strike Price USD 5.00)		25,444		—
Total Rights — 0.0% (Cost: $56,187)				71,210
Total Long-Term Investments —98.8% (Cost: $3,811,366,181)				4,971,691,054
Short-Term Securities
Money Market Funds — 7.5%
BlackRock Cash Funds: Institutional, SL Agency Shares, 5.50%(e)(f)(g)		307,942,361		308,065,538
BlackRock Cash Funds: Treasury, SL Agency Shares, 5.29%(e)(f)		72,455,077		72,455,077
Total Short-Term Securities — 7.5% (Cost: $380,337,907)				380,520,615
Total Investments — 106.3% (Cost: $4,191,704,088)				5,352,211,669
Liabilities in Excess of Other Assets — (6.3)%				(319,441,689	)
Net Assets — 100.0%			$	5,032,769,980

^(a)  Non-income producing security.

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

^(c)  Restricted security as to resale, excluding 144A securities. The Series held restricted securities with a current value of $149,690, representing less than 0.05% of its net assets as of period end, and an original cost of $1,040,392.

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

^(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 purposes of this report, industry and sector sub-classifications may differ from those utilized by the Series for compliance purposes.

Affiliates

Investments in issuers considered to be affiliate(s) of the Series during the period ended March 31, 2024 for purposes of Section 2(a)(3) of the Investment Company Act of 1940, as amended, were as follows:

	Affiliated Issuer	Value at 12/31/23		Purchases at Cost			Proceeds from Sales			Net Realized Gain (Loss)			Change in Unrealized Appreciation (Depreciation)			Value at 03/31/24		Shares Held at 03/31/24		Income			Capital Gain Distributions from Underlying Funds
	BlackRock Cash Funds: Institutional, SL Agency Shares	$	388,629,427	$	—			$(80,498,984)	(a)	$	(2,705	)	$	(62,200	)	$	308,065,538		307,942,361	$	1,240,985	(b)	$	—
	BlackRock Cash Funds: Treasury, SL Agency Shares		55,898,214		16,556,863	(a)		—			—			—			72,455,077		72,455,077		561,578			—
	iShares Russell 2000 ETF		29,308,678		123,868,423			(124,817,104	)		4,084,712			(2,077,599	)		30,367,110		144,399		105,098			—
										$	4,082,007		$	(2,139,799	)	$	410,887,725			$	1,907,661		$	—

^(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, 2024 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
E-mini Russell 2000 Index		271		06/21/24	$	29,077			$	524,376

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	$	6,515,391			$	271,346	(c)	$	6,754,852		0.1%
		Monthly	HSBC Bank PLC(d)		02/10/28		9,865,547				259,951	(e)		10,135,279		0.2
		Monthly	JPMorgan Chase Bank N.A.(f)		02/10/25		12,238,231				105,669	(g)		12,332,904		0.2
										$	636,966		$	29,223,035

^(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 $31,885 of net dividends and financing fees.

^(e)  Amount includes $(9,781) of net dividends and financing fees.

^(g)  Amount includes $10,996 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:	0 - 450 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 08/19/26:

Security	Shares		Value		% of Basket Value
Reference Entity — Long
Common Stocks
Asset Management & Custodian
PJT Partners, Inc., Class A		2,340	$	220,568		3.3	%
Banks: Diversified
Atlantic Union Bankshares Corp.		75		2,648		0.0
Bank of Hawaii Corp.		11,818		737,325		10.9
BankUnited, Inc.		21,093		590,604		8.7
Banner Corp.		1,392		66,816		1.0
Cadence Bank		34,880		1,011,520		15.0
Cathay General Bancorp		978		36,998		0.5
Central Pacific Financial Corp.		1,196		23,621		0.4
City Holding Co.		2,834		295,359		4.4
Community Bank System, Inc.		2,895		139,047		2.1
Eagle Bancorp., Inc.		219		5,144		0.1
Fulton Financial Corp.		28,658		455,376		6.7
Hanmi Financial Corp.		8,735		139,061		2.1
Independent Bank Corp.		1,843		95,873		1.4
National Bank Holdings Corp., Class A		298		10,749		0.2
NBT Bancorp, Inc.		1,502		55,093		0.8

Security	Shares		Value		% of Basket Value
Banks: Diversified (continued)
Preferred Bank/Los Angeles CA		1,571	$	120,606		1.8	%
Simmons First National Corp., Class A		3,862		75,155		1.1
Trustmark Corp.		1,313		36,908		0.5
				3,897,903
Banks: Savings, Thrift & Mortgage Lending
Berkshire Hills Bancorp, Inc.		8,104		185,744		2.7
Northwest Bancshares, Inc.		14,894		173,515		2.6
				359,259
Computer Services Software & Systems
Envestnet, Inc.		5,580		323,138		4.8
Diversified Financial Services
Moelis & Co., Class A		766		43,486		0.6
Insurance: Multi-Line
Horace Mann Educators Corp.		1,326		49,049		0.7
Insurance: Property-Casualty
Genworth Financial, Inc., Class A		1,053		6,771		0.1
ProAssurance Corp.		717		9,220		0.1
Radian Group, Inc.		3,634		121,630		1.8
Stewart Information Services Corp.		6,381		415,148		6.2
				552,769

SERIES  SCHEDULE  OF INVESTMENTS 21

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series

Security	Shares		Value		% of Basket Value
IT Services
Bread Financial Holdings, Inc.		6,070	$	226,047		3.4	%
Office Supplies & Equipment
Pitney Bowes, Inc.		9,221		39,927		0.6
Real Estate Investment Trusts (REITs)
Arbor Realty Trust, Inc.		57,692		764,419		11.3
Douglas Emmett, Inc.		20,064		278,287		4.1
				1,042,706
Net Value of Reference Entity — Goldman Sachs Bank USA			$	6,754,852

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 02/10/28:

Security	Shares		Value		% of Basket Value
Reference Entity — Long
Common Stocks
Alternative Energy
Green Plains, Inc.		25,860	$	597,883		5.9	%
Asset Management & Custodian
Artisan Partners Asset Management, Inc., Class A		5,293		242,261		2.4
Banks: Diversified
Atlantic Union Bankshares Corp.		6,177		218,110		2.2
Banner Corp.		10,095		484,560		4.8
Cadence Bank		12,727		369,083		3.6
Cathay General Bancorp		12,849		486,078		4.8
Community Bank System, Inc.		1,347		64,696		0.6
First BanCorp./Puerto Rico		16,765		294,058		2.9
First Financial Bancorp		8,660		194,157		1.9
Independent Bank Corp.		4,710		245,014		2.4
National Bank Holdings Corp., Class A		1,302		46,963		0.5
NBT Bancorp, Inc.		2,247		82,420		0.8
Preferred Bank/Los Angeles CA, Preference Shares		10,184		781,826		7.7
Renasant Corp.		674		21,110		0.2
Trustmark Corp.		9,988		280,763		2.8
United Community Banks, Inc., Series 16-2		11,104		292,257		2.9
Veritex Holdings, Inc.		1,941		39,771		0.4
				3,900,866
Banks: Savings, Thrift & Mortgage Lending
Berkshire Hills Bancorp, Inc.		10,045		230,231		2.3
Northwest Bancshares, Inc.		15,780		183,837		1.8
WSFS Financial Corp.		13,807		623,248		6.1
				1,037,316
Computer Services Software & Systems
Envestnet, Inc.		7,161		414,694		4.1
Diversified Financial Services
Moelis & Co., Class A		11,511		653,480		6.4
Financial Data & Systems
Green Dot Corp., Class A		16,301		152,088		1.5

Security	Shares		Value		% of Basket Value
Insurance: Property-Casualty
Genworth Financial, Inc., Class A		54,421	$	349,927		3.5	%
Pacific Premier Bancorp, Inc.		16,955		406,920		4.0
ProAssurance Corp.		2,734		35,159		0.3
Radian Group, Inc.		36,924		1,235,847		12.2
Stewart Information Services Corp.		3,034		197,392		2.0
				2,225,245
IT Services
Payoneer Global, Inc.		52,690		256,073		2.5
Office Supplies & Equipment
Pitney Bowes, Inc.		117,101		507,047		5.0
Real Estate Investment Trusts (REITs)
Douglas Emmett, Inc.		10,694		148,326		1.5
Net Value of Reference Entity — HSBC Bank PLC			$	10,135,279

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 02/10/25:

Security	Shares		Value		% of Basket Value
Reference Entity — Long
Common Stocks
Alternative Energy
Green Plains, Inc.		15,114	$	349,436		2.8	%
Banks: Diversified
Ameris Bancorp		7,506		363,140		2.9
Atlantic Union Bankshares Corp.		9,048		319,485		2.6
Bancorp., Inc.		5,726		191,592		1.6
BankUnited, Inc.		701		19,628		0.2
Cadence Bank		27,247		790,163		6.4
Central Pacific Financial Corp.		12,465		246,184		2.0
Community Bank System, Inc.		8,375		402,251		3.3
First BanCorp./Puerto Rico		25,788		452,321		3.7
First Bancorp./Southern Pines NC		3,429		123,855		1.0
First Commonwealth Financial Corp.		888		12,361		0.1
Hanmi Financial Corp.		13,803		219,744		1.8
Hope Bancorp., Inc.		489		5,628		0.0
Independent Bank Corp.		8,632		449,037		3.6
Lakeland Financial Corp.		216		14,325		0.1
National Bank Holdings Corp., Class A		8,436		304,287		2.5
NBT Bancorp, Inc.		4,813		176,541		1.4
Provident Financial Services, Inc.		18,028		262,668		2.1
Renasant Corp.		12,663		396,605		3.2
Seacoast Banking Corp. of Florida		7,750		196,772		1.6
Simmons First National Corp., Class A		17,167		334,070		2.7
TrustCo Bank Corp.		60		1,690		0.0
Veritex Holdings, Inc.		9,338		191,336		1.6
				5,473,683
Banks: Savings, Thrift & Mortgage Lending
Brookline Bancorp, Inc.		7,522		74,919		0.6
Heritage Financial Corp.		2,989		57,957		0.5
				132,876

22

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series

Security	Shares		Value		% of Basket Value
Commercial Finance & Mortgage  Companies
Pathward Financial, Inc.		4,482	$	226,251		1.8	%
Diversified Financial Services
Jackson Financial, Inc., Class A		17,472		1,155,598		9.4
Education Services
Perdoceo Education Corp.		7,471		131,191		1.0
Insurance
Employers Holdings, Inc., Series 2020		6,165		279,829		2.3
Insurance: Multi-Line
Horace Mann Educators Corp.		11,895		439,996		3.6
Safety Insurance Group, Inc.		1,590		130,682		1.0
				570,678
Insurance: Property-Casualty
Genworth Financial, Inc., Class A		73,572		473,068		3.8
ProAssurance Corp.		13,897		178,715		1.5
				651,783

Security	Shares		Value		% of Basket Value
IT Services
Bread Financial Holdings, Inc.		41,007	$	1,527,101		12.4	%
Media
Vimeo, Inc.		54,288		222,038		1.8
Real Estate Investment Trusts (REITs)
Douglas Emmett, Inc.		104,159		1,444,685		11.7
JBG SMITH Properties		10,452		167,755		1.4
				1,612,440
Net Value of Reference Entity — JPMorgan Chase Bank N.A			$	12,332,904

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	$	8,259,995	$	—	$	—	$	8,259,995
Aerospace		6,946,343		—		—		6,946,343
Aerospace & Defense		49,736,989		—		—		49,736,989
Agriculture, Fishing & Ranching		11,398,626		—		—		11,398,626
Air Transport		20,233,170		—		—		20,233,170
Airlines		324,421		—		—		324,421
Alternative Energy		28,658,219		—		—		28,658,219
Aluminum		4,172,796		—		—		4,172,796
Asset Management & Custodian		36,235,153		—		—		36,235,153
Auto Components		7,156,245		—		—		7,156,245

SERIES  SCHEDULE  OF INVESTMENTS 23

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series

Fair Value Hierarchy as of Period End (continued)

	Level 1		Level 2		Level 3		Total
Common Stocks (continued)
Auto Parts	$	33,627,101	$	—	$	—	$	33,627,101
Auto Services		7,210,900		—		—		7,210,900
Back Office Support, HR & Consulting		82,747,932		—		—		82,747,932
Banks: Diversified		395,588,104		—		—		395,588,104
Banks: Savings, Thrift & Mortgage Lending		8,416,368		—		—		8,416,368
Beverage: Soft Drinks		15,926,906		—		—		15,926,906
Biotechnology		394,304,428		149,690		—		394,454,118
Building Materials		56,987,404		—		—		56,987,404
Building Products		2,396,350		—		—		2,396,350
Building: Climate Control		32,113,706		—		—		32,113,706
Building: Roofing, Wallboard & Plumbing		14,934,459		—		—		14,934,459
Cable Television Services		3,288,083		—		—		3,288,083
Capital Markets		10,776,284		—		—		10,776,284
Casinos & Gambling		25,717,783		—		—		25,717,783
Cement		362,389		—		—		362,389
Chemicals		2,088,136		—		—		2,088,136
Chemicals: Diversified		50,483,160		—		—		50,483,160
Chemicals: Specialty		31,003,083		—		—		31,003,083
Coal		21,355,502		—		—		21,355,502
Commercial Banks		1,994,367		—		—		1,994,367
Commercial Finance & Mortgage Companies		14,223,170		—		—		14,223,170
Commercial Services & Supplies		9,169,720		—		—		9,169,720
Commercial Services: Rental & Leasing		51,266,844		—		—		51,266,844
Commercial Vehicles & Parts		23,785,244		—		—		23,785,244
Communications Equipment		533,984		—		—		533,984
Communications Technology		28,729,970		—		—		28,729,970
Computer Services Software & Systems		304,400,453		—		—		304,400,453
Computer Technology		122,796,117		—		—		122,796,117
Construction		31,898,992		—		—		31,898,992
Consumer Electronics		4,712,882		—		—		4,712,882
Consumer Finance		4,811,657		—		—		4,811,657
Consumer Lending		18,842,245		—		—		18,842,245
Consumer Services: Miscellaneous		17,643,705		—		—		17,643,705
Containers & Packaging		15,295,410		—		—		15,295,410
Cosmetics		24,543,357		—		—		24,543,357
Diversified Consumer Services		17,923,457		—		—		17,923,457
Diversified Financial Services		30,700,157		—		—		30,700,157
Diversified Manufacturing Operations		31,581,453		—		—		31,581,453
Diversified Materials & Processing		23,251,899		—		—		23,251,899
Diversified Media		465,469		—		—		465,469
Diversified Retail		16,553,476		—		—		16,553,476
Diversified Telecommunication Services		3,537,152		—		—		3,537,152
Drug & Grocery Store Chains		16,882,577		—		—		16,882,577
Education Services		32,040,921		—		—		32,040,921
Electrical Equipment		10,335,326		—		—		10,335,326
Electronic Components		34,102,208		—		—		34,102,208
Electronic Entertainment		1,137,374		—		—		1,137,374
Electronic Equipment, Instruments & Components		9,179,926		—		—		9,179,926
Electronics		25,133,321		—		—		25,133,321
Energy Equipment		48,864,306		—		—		48,864,306
Energy Equipment & Services		35,617,249		—		—		35,617,249
Engineering & Contracting Services		40,560,312		—		—		40,560,312
Entertainment		17,401,250		—		—		17,401,250
Environmental, Maintenance, & Security Service		24,685,438		—		—		24,685,438
Financial Data & Systems		17,337,174		—		—		17,337,174
Financial Services		15,411,006		—		—		15,411,006
Food & Staples Retailing		324,738		—		—		324,738
Food Products		6,716,918		—		—		6,716,918
Foods		38,213,256		—		—		38,213,256
Forest Products		25,145,746		—		—		25,145,746
Forms & Bulk Printing Services		2,932,082		—		—		2,932,082
Fruit & Grain Processing		2,547,725		—		—		2,547,725
Funeral Parlors & Cemeteries		8,952,028		—		—		8,952,028

24

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series

Fair Value Hierarchy as of Period End (continued)

	Level 1		Level 2		Level 3		Total
Common Stocks (continued)
Gas Pipeline	$	13,689,536	$	—	$	—	$	13,689,536
Glass		2,439,987		—		—		2,439,987
Gold		4,192,196		—		—		4,192,196
Health Care Equipment & Services		2,616,549		—		—		2,616,549
Health Care Equipment & Supplies		8,447,834		—		—		8,447,834
Health Care Facilities		35,973,333		—		—		35,973,333
Health Care Management Services		21,361,084		—		—		21,361,084
Health Care Providers & Services		969,146		—		—		969,146
Health Care Services		71,638,452		—		—		71,638,452
Home Building		78,916,675		—		—		78,916,675
Hotel/Motel		10,964,114		—		—		10,964,114
Hotels, Restaurants & Leisure		5,445,472		—		—		5,445,472
Household Appliances		965,029		—		—		965,029
Household Durables		4,404,156		—		—		4,404,156
Household Equipment & Products		22,610,494		—		—		22,610,494
Household Furnishings		9,426,754		—		—		9,426,754
Independent Power Producers & Energy Traders		1,090,074		—		—		1,090,074
Industrial Conglomerates		1,170,138		—		—		1,170,138
Insurance		20,093,893		—		—		20,093,893
Insurance: Life		18,620,278		—		—		18,620,278
Insurance: Multi-Line		21,007,129		—		—		21,007,129
Insurance: Property-Casualty		66,945,919		—		—		66,945,919
International Trade & Diversified Logistic		1,774,910		—		—		1,774,910
Internet & Catalog Retail		1,434,728		—		—		1,434,728
Internet Software & Services		14,345,022		—		—		14,345,022
IT Services		23,950,023		—		—		23,950,023
Leisure Time		35,999,923		—		—		35,999,923
Life Sciences Tools & Services		803,698		—		—		803,698
Luxury Items		9,935,994		—		—		9,935,994
Machinery		5,421,171		—		—		5,421,171
Machinery: Agricultural		20,269,403		—		—		20,269,403
Machinery: Construction & Handling		12,009,238		—		—		12,009,238
Machinery: Industrial		65,964,155		—		—		65,964,155
Machinery: Specialty		5,457,524		—		—		5,457,524
Manufactured Housing		14,818,583		—		—		14,818,583
Marine		2,975,162		—		—		2,975,162
Media		7,796,154		—		—		7,796,154
Medical & Dental Instruments & Supplies		69,424,383		—		—		69,424,383
Medical Equipment		44,721,054		—		—		44,721,054
Medical Services		1,118,761		—		—		1,118,761
Metal Fabricating		27,577,494		—		—		27,577,494
Metals & Minerals: Diversified		49,792,774		—		—		49,792,774
Metals & Mining		1,466,935		—		—		1,466,935
Mining		762,051		—		—		762,051
Office Supplies & Equipment		11,936,998		—		—		11,936,998
Oil & Gas Producers		18,615,239		—		—		18,615,239
Oil Well Equipment & Services		59,765,141		—		—		59,765,141
Oil, Gas & Consumable Fuels		32,089,864		—		—		32,089,864
Oil: Crude Producers		89,310,405		—		—		89,310,405
Oil: Refining & Marketing		23,114,998		—		—		23,114,998
Paints & Coatings		8,559,246		—		—		8,559,246
Paper		3,364,835		—		—		3,364,835
Paper & Forest Products		4,123,862		—		—		4,123,862
Personal Care		28,457,683		—		—		28,457,683
Personal Products		1,852,416		—		—		1,852,416
Pharmaceuticals		98,314,377		—		—		98,314,377
Photography		502,805		—		—		502,805
Power Transmission Equipment		11,316,440		—		—		11,316,440
Printing & Copying Services		13,385,586		—		—		13,385,586
Producer Durables: Miscellaneous		2,131,947		—		—		2,131,947
Production Technology Equipment		41,858,802		—		—		41,858,802
Professional Services		12,645,112		—		—		12,645,112
Publishing		5,985,331		—		—		5,985,331

SERIES  SCHEDULE  OF INVESTMENTS 25

Schedule of Investments (unaudited) (continued) March 31, 2024 Master Small Cap Index Series

Fair Value Hierarchy as of Period End (continued)

	Level 1		Level 2		Level 3		Total
Common Stocks (continued)
Radio & TV Broadcasters	$	7,073,238	$	—	$	—	$	7,073,238
Railroad Equipment		7,184,599		—		—		7,184,599
Real Estate		19,816,820		—		—		19,816,820
Real Estate Investment Trusts (REITs)		275,706,299		—		—		275,706,299
Real Estate Management & Development		9,509,827		—		—		9,509,827
Recreational Vehicles & Boats		14,363,102		—		—		14,363,102
Rental & Leasing Services: Consumer		3,513,324		—		—		3,513,324
Restaurants		46,086,389		—		—		46,086,389
Scientific Instruments: Control & Filter		34,816,082		—		—		34,816,082
Scientific Instruments: Electrical		34,691,931		—		—		34,691,931
Scientific Instruments: Gauges & Meters		21,091,124		—		—		21,091,124
Scientific Instruments: Pollution Control		1,274,249		—		—		1,274,249
Securities Brokerage & Services		3,552,135		—		—		3,552,135
Semiconductors & Components		82,393,532		—		—		82,393,532
Semiconductors & Semiconductor Equipment		12,771,517		—		—		12,771,517
Shipping		48,357,945		—		—		48,357,945
Software		62,571,758		—		—		62,571,758
Specialty Retail		115,145,389		—		—		115,145,389
Steel		25,868,684		—		—		25,868,684
Technology Hardware & Equipment		7,326,163		—		—		7,326,163
Technology: Miscellaneous		23,487,481		—		—		23,487,481
Telecommunications Equipment		7,300,093		—		—		7,300,093
Textile Products		1,798,344		—		—		1,798,344
Textiles Apparel & Shoes		24,107,692		—		—		24,107,692
Textiles, Apparel & Luxury Goods		109,738		—		—		109,738
Toys		431,053		—		—		431,053
Trading Companies & Distributors		900,618		—		—		900,618
Transportation Miscellaneous		6,059,639		—		—		6,059,639
Truckers		24,223,304		—		—		24,223,304
Utilities: Electrical		52,453,585		—		—		52,453,585
Utilities: Gas Distributors		29,845,032		—		—		29,845,032
Utilities: Miscellaneous		14,734,028		—		—		14,734,028
Utilities: Telecommunications		21,671,538		—		—		21,671,538
Utilities: Water		18,096,227		—		—		18,096,227
Investment Companies		30,367,110		—		—		30,367,110
Rights		—		15,140		56,070		71,210
Short-Term Securities
Money Market Funds		380,520,615		—		—		380,520,615
	$	5,351,990,769	$	164,830	$	56,070	$	5,352,211,669
Derivative Financial Instruments(a)
Assets
Equity Contracts	$	524,376	$	636,966	$	—	$	1,161,342

^(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
CPI	Consumer Price Index
CVR	Contingent Value Right
ETF	Exchange-Traded Fund
REIT	Real Estate Investment Trust

26