NPORT-EX 2 70HETRP033123.htm T. ROWE PRICE INDEX TRUST, INC.
T.
ROWE
PRICE
Mid-Cap
Index
Fund
March
31,
2023
(Unaudited)
1
Portfolio
of
Investments
‡
Shares
$
Value
(Cost
and
value
in
$000s)
‡
COMMON
STOCKS
99.9%
COMMUNICATION
SERVICES
4.9%
Diversified
Telecommunication
Services
0.2%
Frontier
Communications
Parent (1)
7,286‌
166‌
Lumen
Technologies 
30,405‌
81‌
247‌
Entertainment
2.1%
AMC
Entertainment
Holdings,
Class
A (1)(2)
15,466‌
77‌
Liberty
Media-Liberty
Formula
One,
Class
A (1)
634‌
43‌
Liberty
Media-Liberty
Formula
One,
Class
C (1)
5,989‌
448‌
Madison
Square
Garden
Sports 
552‌
108‌
Playtika
Holding (1)
2,716‌
31‌
ROBLOX,
Class
A (1)
13,346‌
600‌
Roku (1)
3,639‌
239‌
Spotify
Technology (1)
4,176‌
558‌
World
Wrestling
Entertainment,
Class
A 
1,279‌
117‌
2,221‌
Interactive
Media
&
Services
0.8%
IAC (1)
2,283‌
118‌
Pinterest,
Class
A (1)
17,723‌
483‌
TripAdvisor (1)
3,045‌
61‌
ZoomInfo
Technologies (1)
8,174‌
202‌
864‌
Media
1.8%
Altice
USA,
Class
A (1)
6,295‌
22‌
Cable
One 
172‌
121‌
Liberty
Broadband,
Class
A (1)
514‌
42‌
Liberty
Broadband,
Class
C (1)
3,563‌
291‌
Liberty
Media-Liberty
SiriusXM,
Class
A (1)
2,237‌
63‌
Liberty
Media-Liberty
SiriusXM,
Class
C (1)
4,582‌
128‌
New
York
Times,
Class
A 
4,829‌
188‌
Nexstar
Media
Group,
Class
A 
1,078‌
186‌
Sirius
XM
Holdings (2)
20,894‌
83‌
Trade
Desk,
Class
A (1)
13,085‌
797‌
1,921‌
Total
Communication
Services
5,253‌
CONSUMER
DISCRETIONARY
12.1%
Automobile
Components
0.5%
Gentex 
6,988‌
196‌
Lear 
1,758‌
245‌
QuantumScape (1)(2)
7,685‌
63‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
2
Shares
$
Value
(Cost
and
value
in
$000s)
‡
504‌
Automobiles
0.6%
Harley-Davidson 
4,014‌
152‌
Lucid
Group (1)(2)
17,283‌
139‌
Rivian
Automotive,
Class
A (1)
15,430‌
239‌
Thor
Industries 
1,532‌
122‌
652‌
Broadline
Retail
0.3%
Kohl's 
3,264‌
77‌
Macy's 
8,042‌
141‌
Nordstrom (2)
3,299‌
54‌
Ollie's
Bargain
Outlet
Holdings (1)
1,855‌
107‌
379‌
Diversified
Consumer
Services
0.7%
ADT 
6,239‌
45‌
Bright
Horizons
Family
Solutions (1)
1,723‌
133‌
Grand
Canyon
Education (1)
912‌
104‌
H&R
Block 
4,554‌
161‌
Mister
Car
Wash (1)(2)
2,329‌
20‌
Service
Corp
International 
4,468‌
307‌
770‌
Hotels,
Restaurants
&
Leisure
3.9%
Airbnb,
Class
A (1)
11,190‌
1,392‌
Aramark 
7,029‌
252‌
Boyd
Gaming 
2,296‌
147‌
Choice
Hotels
International 
956‌
112‌
Churchill
Downs 
1,066‌
274‌
DoorDash,
Class
A (1)
7,453‌
474‌
DraftKings,
Class
A (1)
10,525‌
204‌
Hyatt
Hotels,
Class
A (1)
1,409‌
158‌
Marriott
Vacations
Worldwide 
1,112‌
150‌
Penn
Entertainment (1)
4,586‌
136‌
Planet
Fitness,
Class
A (1)
2,482‌
193‌
Six
Flags
Entertainment (1)
2,216‌
59‌
Travel
+
Leisure 
2,372‌
93‌
Vail
Resorts 
1,196‌
279‌
Wendy's 
5,058‌
110‌
Wyndham
Hotels
&
Resorts 
2,581‌
175‌
4,208‌
Household
Durables
0.7%
Leggett
&
Platt 
3,939‌
126‌
Tempur
Sealy
International 
4,946‌
195‌
Toll
Brothers 
3,274‌
197‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
3
Shares
$
Value
(Cost
and
value
in
$000s)
‡
TopBuild (1)
948‌
197‌
715‌
Leisure
Products
0.7%
Brunswick 
2,149‌
176‌
Mattel (1)
10,455‌
192‌
Peloton
Interactive,
Class
A (1)
9,162‌
104‌
Polaris 
1,636‌
181‌
YETI
Holdings (1)
2,564‌
103‌
756‌
Specialty
Retail
2.4%
AutoNation (1)
1,010‌
136‌
Burlington
Stores (1)
1,942‌
392‌
Carvana (1)(2)
3,137‌
31‌
Dick's
Sporting
Goods 
1,590‌
225‌
Five
Below (1)
1,630‌
336‌
Floor
&
Decor
Holdings,
Class
A (1)
3,084‌
303‌
GameStop,
Class
A (1)(2)
7,989‌
184‌
Gap (2)
5,801‌
58‌
Leslie's (1)
5,253‌
58‌
Lithia
Motors 
805‌
184‌
Penske
Automotive
Group 
766‌
108‌
Petco
Health
&
Wellness (1)
2,425‌
22‌
RH (1)
539‌
131‌
Victoria's
Secret (1)
2,424‌
83‌
Wayfair,
Class
A (1)
2,349‌
81‌
Williams-Sonoma 
1,980‌
241‌
2,573‌
Textiles,
Apparel
&
Luxury
Goods
2.3%
Capri
Holdings (1)
3,680‌
173‌
Carter's 
1,115‌
80‌
Columbia
Sportswear 
1,075‌
97‌
Deckers
Outdoor (1)
787‌
354‌
Hanesbrands 
10,408‌
55‌
Lululemon
Athletica (1)
3,329‌
1,212‌
PVH 
1,869‌
167‌
Skechers
USA,
Class
A (1)
3,999‌
190‌
Under
Armour,
Class
A (1)
5,665‌
54‌
Under
Armour,
Class
C (1)
5,651‌
48‌
2,430‌
Total
Consumer
Discretionary
12,987‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
4
Shares
$
Value
(Cost
and
value
in
$000s)
‡
CONSUMER
STAPLES
2.4%
Beverages
0.1%
Boston
Beer,
Class
A (1)
281‌
92‌
92‌
Consumer
Staples
Distribution
&
Retail
1.2%
Albertsons,
Class
A 
6,935‌
144‌
BJ's
Wholesale
Club
Holdings (1)
4,003‌
305‌
Casey's
General
Stores 
1,101‌
238‌
Grocery
Outlet
Holding (1)
2,628‌
74‌
Performance
Food
Group (1)
4,540‌
274‌
U.S.
Foods
Holding (1)
6,032‌
223‌
1,258‌
Food
Products
0.9%
Darling
Ingredients (1)
4,777‌
279‌
Flowers
Foods 
5,590‌
153‌
Freshpet (1)
1,353‌
90‌
Ingredion 
1,949‌
198‌
Pilgrim's
Pride (1)
1,390‌
32‌
Post
Holdings (1)
1,602‌
144‌
Seaboard 
8‌
30‌
926‌
Household
Products
0.1%
Reynolds
Consumer
Products 
1,623‌
45‌
Spectrum
Brands
Holdings 
1,191‌
79‌
124‌
Personal
Care
Products
0.1%
Coty,
Class
A (1)
10,412‌
126‌
Olaplex
Holdings (1)
3,739‌
16‌
142‌
Total
Consumer
Staples
2,542‌
ENERGY
3.2%
Energy
Equipment
&
Services
0.2%
NOV 
11,731‌
217‌
217‌
Oil,
Gas
&
Consumable
Fuels
3.0%
Antero
Midstream 
9,997‌
105‌
Antero
Resources (1)
8,435‌
195‌
Cheniere
Energy 
7,420‌
1,169‌
Chesapeake
Energy 
3,625‌
276‌
DT
Midstream 
2,884‌
142‌
Enviva 
897‌
26‌
HF
Sinclair 
4,012‌
194‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
5
Shares
$
Value
(Cost
and
value
in
$000s)
‡
New
Fortress
Energy 
1,657‌
49‌
Ovintiv 
7,296‌
263‌
PDC
Energy 
2,612‌
168‌
Range
Resources 
7,004‌
185‌
Southwestern
Energy (1)
32,636‌
163‌
Texas
Pacific
Land 
170‌
289‌
Vitesse
Energy 
773‌
15‌
3,239‌
Total
Energy
3,456‌
FINANCIALS
16.2%
Banks
2.8%
Bank
of
Hawaii (2)
1,161‌
60‌
Bank
OZK 
3,312‌
113‌
BOK
Financial 
865‌
73‌
Columbia
Banking
System 
6,131‌
131‌
Commerce
Bancshares 
3,409‌
199‌
Cullen/Frost
Bankers 
1,735‌
183‌
East
West
Bancorp 
4,205‌
233‌
First
Citizens
BancShares,
Class
A 
327‌
318‌
First
Hawaiian 
3,814‌
79‌
First
Horizon 
15,798‌
281‌
FNB 
10,651‌
124‌
New
York
Community
Bancorp 
19,917‌
180‌
PacWest
Bancorp 
3,475‌
34‌
Pinnacle
Financial
Partners 
2,231‌
123‌
Popular 
2,089‌
120‌
Prosperity
Bancshares 
2,604‌
160‌
Synovus
Financial 
4,274‌
132‌
Webster
Financial 
5,130‌
202‌
Western
Alliance
Bancorp 
3,142‌
112‌
Wintrust
Financial 
1,783‌
130‌
2,987‌
Capital
Markets
5.7%
Affiliated
Managers
Group 
1,113‌
158‌
Ares
Management,
Class
A 
4,561‌
381‌
Blackstone 
21,158‌
1,858‌
Blue
Owl
Capital 
12,557‌
139‌
Carlyle
Group 
6,157‌
191‌
Coinbase
Global,
Class
A (1)
4,771‌
322‌
Evercore,
Class
A 
1,080‌
125‌
Interactive
Brokers
Group,
Class
A 
2,757‌
228‌
Janus
Henderson
Group 
4,049‌
108‌
Jefferies
Financial
Group 
5,886‌
187‌
KKR 
17,053‌
896‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
6
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Lazard,
Class
A 
2,463‌
81‌
LPL
Financial
Holdings 
2,375‌
481‌
Morningstar 
739‌
150‌
Robinhood
Markets,
Class
A (1)
16,989‌
165‌
SEI
Investments 
3,058‌
176‌
Stifel
Financial 
3,064‌
181‌
Tradeweb
Markets,
Class
A 
3,224‌
255‌
Virtu
Financial,
Class
A 
2,814‌
53‌
6,135‌
Consumer
Finance
0.7%
Ally
Financial 
8,916‌
227‌
Credit
Acceptance (1)(2)
196‌
85‌
OneMain
Holdings 
3,399‌
126‌
SLM 
7,106‌
88‌
SoFi
Technologies (1)
23,974‌
146‌
Upstart
Holdings (1)(2)
2,065‌
33‌
705‌
Financial
Services
3.3%
Affirm
Holdings (1)
6,622‌
75‌
Apollo
Global
Management 
14,418‌
911‌
Block,
Class
A (1)
15,985‌
1,097‌
Corebridge
Financial 
2,399‌
38‌
Equitable
Holdings 
11,005‌
279‌
Euronet
Worldwide (1)
1,406‌
157‌
MGIC
Investment 
8,751‌
117‌
Rocket,
Class
A (1)
3,442‌
31‌
Shift4
Payments,
Class
A (1)(2)
1,500‌
114‌
TFS
Financial 
1,464‌
19‌
Toast,
Class
A (1)
7,638‌
136‌
UWM
Holdings (2)
2,679‌
13‌
Voya
Financial 
2,918‌
209‌
Western
Union 
11,041‌
123‌
WEX (1)
1,300‌
239‌
3,558‌
Insurance
3.1%
American
Financial
Group 
2,011‌
244‌
Assured
Guaranty 
1,715‌
86‌
Axis
Capital
Holdings 
2,304‌
126‌
Brighthouse
Financial (1)
2,011‌
89‌
CNA
Financial 
800‌
31‌
Erie
Indemnity,
Class
A 
744‌
172‌
F&G
Annuities
&
Life 
568‌
10‌
Fidelity
National
Financial 
7,776‌
272‌
First
American
Financial 
3,001‌
167‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
7
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Hanover
Insurance
Group 
1,060‌
136‌
Kemper 
1,893‌
104‌
Markel (1)
394‌
503‌
Old
Republic
International 
8,370‌
209‌
Primerica 
1,095‌
189‌
Reinsurance
Group
of
America 
1,994‌
265‌
RenaissanceRe
Holdings 
1,285‌
258‌
Ryan
Specialty
Holdings (1)
2,446‌
98‌
Unum
Group 
5,921‌
234‌
White
Mountains
Insurance
Group 
74‌
102‌
3,295‌
Mortgage
Real
Estate
Investment
Trusts
0.6%
AGNC
Investment,
REIT 
16,973‌
171‌
Annaly
Capital
Management,
REIT 
13,956‌
267‌
Rithm
Capital,
REIT 
12,891‌
103‌
Starwood
Property
Trust,
REIT (2)
8,663‌
153‌
694‌
Total
Financials
17,374‌
HEALTH
CARE
10.6%
Biotechnology
4.4%
Alnylam
Pharmaceuticals (1)
3,666‌
734‌
BioMarin
Pharmaceutical (1)
5,506‌
535‌
Exact
Sciences (1)
5,199‌
353‌
Exelixis (1)
9,507‌
185‌
Horizon
Therapeutics (1)
6,601‌
720‌
Ionis
Pharmaceuticals (1)
4,201‌
150‌
Mirati
Therapeutics (1)
1,330‌
49‌
Natera (1)
2,923‌
162‌
Neurocrine
Biosciences (1)
2,859‌
289‌
Novavax (1)(2)
2,665‌
19‌
Sarepta
Therapeutics (1)
2,502‌
345‌
Seagen (1)
4,053‌
821‌
Ultragenyx
Pharmaceutical (1)
1,994‌
80‌
United
Therapeutics (1)
1,326‌
297‌
4,739‌
Health
Care
Equipment
&
Supplies
1.5%
Enovis (1)
1,513‌
81‌
Envista
Holdings (1)
4,841‌
198‌
Globus
Medical,
Class
A (1)
2,299‌
130‌
ICU
Medical (1)
600‌
99‌
Integra
LifeSciences
Holdings (1)
2,152‌
124‌
Masimo (1)
1,416‌
261‌
Novocure (1)
3,090‌
186‌
Penumbra (1)
1,060‌
295‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
8
Shares
$
Value
(Cost
and
value
in
$000s)
‡
QuidelOrtho (1)
1,450‌
129‌
Tandem
Diabetes
Care (1)
1,899‌
77‌
1,580‌
Health
Care
Providers
&
Services
1.2%
Acadia
Healthcare (1)
2,651‌
192‌
agilon
health (1)(2)
5,639‌
134‌
Amedisys (1)
953‌
70‌
Chemed 
435‌
234‌
Encompass
Health 
2,905‌
157‌
Enhabit (1)
1,445‌
20‌
Guardant
Health (1)(2)
2,911‌
68‌
Oak
Street
Health (1)
3,450‌
133‌
Premier,
Class
A 
3,488‌
113‌
Tenet
Healthcare (1)
3,161‌
188‌
1,309‌
Health
Care
Technology
1.0%
Certara (1)
3,472‌
84‌
Definitive
Healthcare (1)
1,074‌
11‌
Doximity,
Class
A (1)(2)
3,323‌
107‌
Teladoc
Health (1)
4,757‌
123‌
Veeva
Systems,
Class
A (1)
4,155‌
764‌
1,089‌
Life
Sciences
Tools
&
Services
1.6%
10X
Genomics,
Class
A (1)
2,757‌
154‌
Avantor (1)
18,149‌
384‌
Azenta (1)
2,026‌
90‌
Bruker 
3,204‌
252‌
Maravai
LifeSciences
Holdings,
Class
A (1)
3,230‌
45‌
QIAGEN (1)
6,745‌
310‌
Repligen (1)
1,650‌
278‌
Sotera
Health (1)
2,956‌
53‌
Syneos
Health (1)
3,051‌
109‌
1,675‌
Pharmaceuticals
0.9%
Elanco
Animal
Health (1)
13,186‌
124‌
Jazz
Pharmaceuticals (1)
1,839‌
269‌
Perrigo 
3,996‌
143‌
Royalty
Pharma,
Class
A 
11,066‌
399‌
935‌
Total
Health
Care
11,327‌
INDUSTRIALS
&
BUSINESS
SERVICES
16.6%
Aerospace
&
Defense
1.8%
Axon
Enterprise (1)
2,019‌
454‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
9
Shares
$
Value
(Cost
and
value
in
$000s)
‡
BWX
Technologies 
2,716‌
171‌
Curtiss-Wright 
1,139‌
201‌
HEICO 
1,335‌
228‌
HEICO,
Class
A 
2,358‌
321‌
Hexcel 
2,489‌
170‌
Mercury
Systems (1)
1,472‌
75‌
Spirit
AeroSystems
Holdings,
Class
A 
3,103‌
107‌
Woodward 
1,719‌
167‌
1,894‌
Air
Freight
&
Logistics
0.1%
GXO
Logistics (1)
3,142‌
159‌
159‌
Building
Products
1.9%
Advanced
Drainage
Systems 
1,858‌
156‌
Armstrong
World
Industries 
1,348‌
96‌
AZEK (1)
3,326‌
78‌
Builders
FirstSource (1)
4,325‌
384‌
Carlisle 
1,530‌
346‌
Fortune
Brands
Innovations 
3,808‌
224‌
Hayward
Holdings (1)
2,027‌
24‌
Lennox
International 
955‌
240‌
Masterbrand (1)
3,782‌
30‌
Owens
Corning 
2,785‌
267‌
Trex (1)
3,266‌
159‌
2,004‌
Commercial
Services
&
Supplies
0.8%
Clean
Harbors (1)
1,516‌
216‌
Driven
Brands
Holdings (1)
1,870‌
57‌
MSA
Safety 
1,098‌
146‌
Ritchie
Bros
Auctioneers 
2,092‌
118‌
Stericycle (1)
2,722‌
119‌
Tetra
Tech 
1,563‌
229‌
885‌
Construction
&
Engineering
1.1%
AECOM 
3,933‌
332‌
MasTec (1)
1,813‌
171‌
MDU
Resources 
6,007‌
183‌
Valmont
Industries 
623‌
199‌
WillScot
Mobile
Mini
Holdings (1)
6,071‌
284‌
1,169‌
Electrical
Equipment
1.7%
Acuity
Brands 
955‌
174‌
ChargePoint
Holdings (1)(2)
7,522‌
79‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
10
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Hubbell 
1,593‌
388‌
nVent
Electric 
4,952‌
213‌
Plug
Power (1)(2)
15,448‌
181‌
Regal
Rexnord 
1,935‌
272‌
Sensata
Technologies
Holding 
4,516‌
226‌
Sunrun (1)
6,165‌
124‌
Vertiv
Holdings 
9,022‌
129‌
1,786‌
Ground
Transportation
2.9%
Avis
Budget
Group (1)
762‌
148‌
Hertz
Global
Holdings (1)(2)
5,409‌
88‌
Knight-Swift
Transportation
Holdings 
4,659‌
264‌
Landstar
System 
1,060‌
190‌
Lyft,
Class
A (1)
9,725‌
90‌
RXO (1)
3,399‌
67‌
Ryder
System 
1,442‌
129‌
Schneider
National,
Class
B 
1,615‌
43‌
Uber
Technologies (1)
57,229‌
1,814‌
U-Haul
Holding 
2,406‌
125‌
U-Haul
Holding (2)
261‌
16‌
XPO (1)
3,043‌
97‌
3,071‌
Machinery
2.6%
AGCO 
1,855‌
251‌
Allison
Transmission
Holdings 
2,728‌
123‌
Crane
Holdings 
1,404‌
159‌
Donaldson 
3,612‌
236‌
Esab 
1,690‌
100‌
Flowserve 
3,871‌
132‌
Gates
Industrial (1)
3,227‌
45‌
Graco 
4,991‌
364‌
ITT 
2,479‌
214‌
Lincoln
Electric
Holdings 
1,673‌
283‌
Middleby (1)
1,597‌
234‌
Oshkosh 
1,953‌
163‌
Timken 
1,824‌
149‌
Toro 
3,103‌
345‌
2,798‌
Marine
Transportation
0.1%
Kirby (1)
1,770‌
123‌
123‌
Passenger
Airlines
0.1%
Copa
Holdings,
Class
A (1)
843‌
78‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
11
Shares
$
Value
(Cost
and
value
in
$000s)
‡
JetBlue
Airways (1)
9,596‌
70‌
148‌
Professional
Services
2.4%
Booz
Allen
Hamilton
Holding 
3,904‌
362‌
CACI
International,
Class
A (1)
689‌
204‌
Clarivate (1)
14,050‌
132‌
Concentrix 
1,268‌
154‌
Dun
&
Bradstreet
Holdings 
7,486‌
88‌
FTI
Consulting (1)
1,003‌
198‌
Genpact 
5,314‌
245‌
KBR 
4,073‌
224‌
ManpowerGroup 
1,493‌
123‌
Science
Applications
International 
1,635‌
176‌
SS&C
Technologies
Holdings 
6,565‌
371‌
TransUnion 
5,727‌
356‌
2,633‌
Trading
Companies
&
Distributors
1.1%
Air
Lease 
3,077‌
121‌
Core
&
Main,
Class
A (1)
2,205‌
51‌
MSC
Industrial
Direct,
Class
A 
1,372‌
115‌
SiteOne
Landscape
Supply (1)
1,323‌
181‌
Univar
Solutions (1)
4,793‌
168‌
Watsco 
979‌
312‌
WESCO
International 
1,332‌
206‌
1,154‌
Total
Industrials
&
Business
Services
17,824‌
INFORMATION
TECHNOLOGY
21.5%
Communications
Equipment
0.4%
Ciena (1)
4,404‌
231‌
Lumentum
Holdings (1)
2,028‌
110‌
Ubiquiti (2)
122‌
33‌
Viasat (1)(2)
2,170‌
73‌
447‌
Electronic
Equipment,
Instruments
&
Components
1.7%
Arrow
Electronics (1)
1,730‌
216‌
Avnet 
2,695‌
122‌
Cognex 
5,203‌
258‌
Coherent (1)
3,555‌
135‌
IPG
Photonics (1)
967‌
119‌
Jabil 
3,885‌
343‌
Littelfuse 
722‌
194‌
National
Instruments 
3,920‌
205‌
TD
SYNNEX 
1,387‌
134‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
12
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Vontier 
4,692‌
128‌
1,854‌
IT
Services
4.0%
Amdocs 
3,532‌
339‌
Cloudflare,
Class
A (1)
8,439‌
520‌
Globant (1)
1,211‌
199‌
GoDaddy,
Class
A (1)
4,654‌
362‌
Kyndryl
Holdings (1)
6,102‌
90‌
MongoDB (1)
1,979‌
461‌
Okta (1)
4,501‌
388‌
Snowflake,
Class
A (1)
9,244‌
1,426‌
Thoughtworks
Holding (1)
2,661‌
20‌
Twilio,
Class
A (1)
5,180‌
345‌
Wix.com (1)
1,643‌
164‌
4,314‌
Semiconductors
&
Semiconductor
Equipment
2.6%
Allegro
MicroSystems (1)
1,979‌
95‌
Cirrus
Logic (1)
1,630‌
178‌
Entegris 
4,417‌
362‌
GLOBALFOUNDRIES (1)(2)
1,883‌
136‌
Lattice
Semiconductor (1)
4,036‌
385‌
Marvell
Technology 
25,299‌
1,096‌
MKS
Instruments 
1,699‌
151‌
Universal
Display 
1,291‌
200‌
Wolfspeed (1)
3,680‌
239‌
2,842‌
Software
12.3%
Alteryx,
Class
A (1)
1,785‌
105‌
AppLovin,
Class
A (1)
6,512‌
103‌
Aspen
Technology (1)
804‌
184‌
Atlassian,
Class
A (1)
4,340‌
743‌
Bentley
Systems,
Class
B 
5,038‌
217‌
BILL
Holdings (1)
2,956‌
240‌
Black
Knight (1)
4,615‌
266‌
CCC
Intelligent
Solutions
Holdings (1)
5,108‌
46‌
Confluent,
Class
A (1)
3,708‌
89‌
Crowdstrike
Holdings,
Class
A (1)
6,423‌
882‌
Datadog,
Class
A (1)
7,921‌
576‌
DocuSign (1)
5,875‌
342‌
Dolby
Laboratories,
Class
A 
1,754‌
150‌
DoubleVerify
Holdings (1)
2,558‌
77‌
Dropbox,
Class
A (1)
7,980‌
172‌
Dynatrace (1)
6,478‌
274‌
Elastic (1)
2,292‌
133‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
13
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Five9 (1)
2,105‌
152‌
Guidewire
Software (1)
2,434‌
200‌
HubSpot (1)
1,382‌
592‌
Informatica,
Class
A (1)
1,113‌
18‌
Jamf
Holding (1)
1,976‌
38‌
Manhattan
Associates (1)
1,852‌
287‌
nCino (1)
2,096‌
52‌
NCR (1)
3,835‌
90‌
New
Relic (1)
1,583‌
119‌
Nutanix,
Class
A (1)
6,830‌
177‌
Palantir
Technologies,
Class
A (1)
54,867‌
464‌
Palo
Alto
Networks (1)
8,865‌
1,771‌
Paycor
HCM (1)
1,831‌
49‌
Paylocity
Holding (1)
1,193‌
237‌
Pegasystems 
1,232‌
60‌
Procore
Technologies (1)
2,113‌
132‌
RingCentral,
Class
A (1)
2,536‌
78‌
SentinelOne,
Class
A (1)
5,683‌
93‌
Smartsheet,
Class
A (1)
3,781‌
181‌
Splunk (1)
4,861‌
466‌
Teradata (1)
3,039‌
122‌
UiPath,
Class
A (1)
11,214‌
197‌
Unity
Software (1)
7,023‌
228‌
VMware,
Class
A (1)
6,370‌
795‌
Workday,
Class
A (1)
5,954‌
1,230‌
Zoom
Video
Communications,
Class
A (1)
7,331‌
541‌
Zscaler (1)
2,521‌
294‌
13,262‌
Technology
Hardware,
Storage
&
Peripherals
0.5%
Dell
Technologies,
Class
C 
7,024‌
283‌
Pure
Storage,
Class
A (1)
8,471‌
216‌
499‌
Total
Information
Technology
23,218‌
MATERIALS
4.6%
Chemicals
1.6%
Ashland 
1,511‌
155‌
Axalta
Coating
Systems (1)
6,567‌
199‌
Chemours 
4,365‌
131‌
Element
Solutions 
6,675‌
129‌
Ginkgo
Bioworks
Holdings (1)
25,585‌
34‌
Huntsman 
5,438‌
149‌
NewMarket 
171‌
62‌
Olin 
3,626‌
201‌
RPM
International 
3,795‌
331‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
14
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Scotts
Miracle-Gro 
1,205‌
84‌
Valvoline 
5,153‌
180‌
Westlake 
978‌
114‌
1,769‌
Construction
Materials
0.1%
Eagle
Materials 
1,074‌
158‌
158‌
Containers
&
Packaging
1.2%
AptarGroup 
1,956‌
231‌
Ardagh
Metal
Packaging 
4,310‌
18‌
Berry
Global
Group 
3,615‌
213‌
Crown
Holdings 
3,440‌
284‌
Graphic
Packaging
Holding 
9,135‌
233‌
Silgan
Holdings 
2,502‌
134‌
Sonoco
Products 
2,885‌
176‌
1,289‌
Metals
&
Mining
1.6%
Alcoa 
5,249‌
223‌
Cleveland-Cliffs (1)
15,256‌
280‌
MP
Materials (1)
2,712‌
76‌
Reliance
Steel
&
Aluminum 
1,741‌
447‌
Royal
Gold 
1,956‌
254‌
Southern
Copper 
2,540‌
194‌
SSR
Mining 
6,150‌
93‌
United
States
Steel 
6,738‌
176‌
1,743‌
Paper
&
Forest
Products
0.1%
Louisiana-Pacific 
2,105‌
114‌
114‌
Total
Materials
5,073‌
REAL
ESTATE
6.2%
Diversified
Real
Estate
Investment
Trusts
0.4%
WP
Carey,
REIT 
6,228‌
482‌
482‌
Health
Care
Real
Estate
Investment
Trusts
0.5%
Healthcare
Realty
Trust,
REIT 
11,364‌
220‌
Medical
Properties
Trust,
REIT (2)
17,675‌
145‌
Omega
Healthcare
Investors,
REIT 
6,989‌
192‌
557‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
15
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Hotel
&
Resort
Real
Estate
Investment
Trusts
0.1%
Park
Hotels
&
Resorts,
REIT 
6,642‌
82‌
82‌
Industrial
Real
Estate
Investment
Trusts
0.9%
Americold
Realty
Trust,
REIT 
8,035‌
229‌
EastGroup
Properties,
REIT 
1,224‌
202‌
First
Industrial
Realty
Trust,
REIT 
3,918‌
208‌
Rexford
Industrial
Realty,
REIT 
5,814‌
347‌
986‌
Office
Real
Estate
Investment
Trusts
0.5%
Cousins
Properties,
REIT 
4,492‌
96‌
Douglas
Emmett,
REIT 
5,040‌
62‌
Highwoods
Properties,
REIT 
3,096‌
72‌
Hudson
Pacific
Properties,
REIT 
4,031‌
27‌
JBG
SMITH
Properties,
REIT 
3,217‌
48‌
Kilroy
Realty,
REIT 
3,454‌
112‌
SL
Green
Realty,
REIT (2)
1,913‌
45‌
Vornado
Realty
Trust,
REIT 
5,252‌
81‌
543‌
Real
Estate
Management
&
Development
0.6%
Howard
Hughes (1)
1,091‌
87‌
Jones
Lang
LaSalle (1)
1,417‌
206‌
Opendoor
Technologies,
Class
A (1)
14,065‌
25‌
WeWork,
Class
A (1)(2)
6,145‌
5‌
Zillow
Group,
Class
A (1)
1,678‌
73‌
Zillow
Group,
Class
C (1)
4,694‌
209‌
605‌
Residential
Real
Estate
Investment
Trusts
1.2%
American
Homes
4
Rent,
Class
A,
REIT 
9,191‌
289‌
Apartment
Income
REIT,
REIT 
4,440‌
159‌
Equity
LifeStyle
Properties,
REIT 
5,282‌
355‌
Sun
Communities,
REIT 
3,629‌
511‌
1,314‌
Retail
Real
Estate
Investment
Trusts
0.5%
Brixmor
Property
Group,
REIT 
8,871‌
191‌
National
Retail
Properties,
REIT 
5,374‌
237‌
Spirit
Realty
Capital,
REIT 
4,139‌
165‌
593‌
Specialized
Real
Estate
Investment
Trusts
1.5%
CubeSmart,
REIT 
6,678‌
309‌
EPR
Properties,
REIT 
2,204‌
84‌
Gaming
&
Leisure
Properties,
REIT 
7,261‌
378‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
16
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Lamar
Advertising,
Class
A,
REIT 
2,589‌
259‌
Life
Storage,
REIT 
2,502‌
328‌
National
Storage
Affiliates
Trust,
REIT 
2,522‌
105‌
Rayonier,
REIT 
4,346‌
144‌
1,607‌
Total
Real
Estate
6,769‌
UTILITIES
1.6%
Electric
Utilities
0.6%
Avangrid 
2,117‌
84‌
Hawaiian
Electric
Industries 
3,223‌
124‌
IDACORP 
1,497‌
162‌
OGE
Energy 
5,965‌
225‌
595‌
Gas
Utilities
0.3%
National
Fuel
Gas 
2,614‌
151‌
UGI 
6,214‌
216‌
367‌
Independent
Power
&
Renewable
Electricity
Producers
0.4%
Brookfield
Renewable,
Class
A 
3,784‌
132‌
Vistra 
11,739‌
282‌
414‌
Water
Utilities
0.3%
Essential
Utilities 
6,914‌
302‌
302‌
Total
Utilities
1,678‌
Total
Common
Stocks
(Cost
$123,338)
107,501‌
SHORT-TERM
INVESTMENTS
0.1%
Money
Market
Funds
0.1%
T.
Rowe
Price
Government
Reserve
Fund,
4.82% (3)(4)
60,591‌
61‌
Total
Short-Term
Investments
(Cost
$61)
61‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
17
Shares
$
Value
(Cost
and
value
in
$000s)
‡
SECURITIES
LENDING
COLLATERAL
1.6%
INVESTMENTS
IN
A
POOLED
ACCOUNT
THROUGH
SECURITIES
LENDING
PROGRAM
WITH
STATE
STREET
BANK
AND
TRUST
COMPANY
1.6%
Money
Market
Funds
1.6%
T.
Rowe
Price
Government
Reserve
Fund,
4.82% (3)(4)
1,735,361‌
1,735‌
Total
Investments
in
a
Pooled
Account
through
Securities
Lending
Program
with
State
Street
Bank
and
Trust
Company
1,735‌
Total
Securities
Lending
Collateral
(Cost
$1,735)
1,735‌
Total
Investments
in
Securities
101.6%
(Cost
$125,134)
$
109,297‌
Other
Assets
Less
Liabilities
(1.6)%
(1,715‌)
Net
Assets
100.0%
$
107,582‌
‡
Shares
are
denominated
in
U.S.
dollars
unless
otherwise
noted.
(1)
Non-income
producing
(2)
All
or
a
portion
of
this
security
is
on
loan
at
March
31,
2023.
(3)
Seven-day
yield
(4)
Affiliated
Companies
REIT
A
domestic
Real
Estate
Investment
Trust
whose
distributions
pass-through
with
original
tax
character
to
the
shareholder
T.
ROWE
PRICE
Mid-Cap
Index
Fund
18
The
accompanying
notes
are
an
integral
part
of
this
Portfolio
of
Investments.
AFFILIATED
COMPANIES
($000s)
The
fund
may
invest
in
certain
securities
that
are
considered
affiliated
companies.
As
defined
by
the
1940
Act,
an
affiliated
company
is
one
in
which
the
fund
owns
5%
or
more
of
the
outstanding
voting
securities,
or
a
company
that
is
under
common
ownership
or
control.
The
following
securities
were
considered
affiliated
companies
for
all
or
some
portion
of
the
three
months
ended
March
31,
2023.
Net
realized
gain
(loss),
investment
income,
change
in
net
unrealized
gain/loss,
and
purchase
and
sales
cost
reflect
all
activity
for
the
period
then
ended.
Affiliate
Net
Realized
Gain
(Loss)
Change
in
Net
Unrealized
Gain/Loss
Investment
Income
T.
Rowe
Price
Government
Reserve
Fund,
4.82%
$
—‌
$
—‌
$
3‌++
Totals
$
—‌#
$
—‌
$
3‌+
Supplementary
Investment
Schedule
Affiliate
Value
12/31/22
Purchase
Cost
Sales
Cost
Value
03/31/23
T.
Rowe
Price
Government
Reserve
Fund,
4.82%
$
2,015‌
 ¤
 ¤
$
1,796‌
Total
$
1,796‌^
#
Capital
gain
distributions
from
underlying
Price
funds
represented
$0
of
the
net
realized
gain
(loss).
++
Excludes
earnings
on
securities
lending
collateral,
which
are
subject
to
rebates
and
fees.
+
Investment
income
comprised
$3
of
dividend
income
and
$0
of
interest
income.
¤
Purchase
and
sale
information
not
shown
for
cash
management
funds.
^
The
cost
basis
of
investments
in
affiliated
companies
was
$1,796.
T.
ROWE
PRICE
Mid-Cap
Index
Fund
Unaudited
Notes
to
Portfolio
of
Investments
19
T.
Rowe
Price
Mid-Cap
Index
Fund (the
fund) is
registered
under
the
Investment
Company
Act
of
1940
(the
1940
Act)
as
an
open-end
management
investment
company
and
follows
accounting
and
reporting
guidance
of
the
Financial
Accounting
Standards
Board
Accounting
Standards
Codification
Topic
946.
The
accompanying
Portfolio
of
Investments
was
prepared
in
accordance
with
accounting
principles
generally
accepted
in
the
United
States
of
America
(GAAP).
For
additional
information
on
the
fund’s
significant
accounting
policies
and
investment
related
disclosures,
please
refer
to
the
fund’s most
recent
semiannual
or
annual
shareholder
report
and
its
prospectus. 
VALUATION 
Fair
Value
  The
fund’s
financial
instruments
are
valued
at
the
close
of
the
New
York
Stock
Exchange
(NYSE),
normally
4
p.m.
ET,
each
day
the
NYSE
is
open
for
business,
and
are
reported
at
fair
value,
which
GAAP
defines
as
the
price
that
would
be
received
to
sell
an
asset
or
paid
to
transfer
a
liability
in
an
orderly
transaction
between
market
participants
at
the
measurement
date. The fund’s
Board
of
Directors
(the
Board)
has
designated
T.
Rowe
Price
Associates,
Inc.
as
the
fund’s
valuation
designee
(Valuation
Designee).
Subject
to
oversight
by
the
Board,
the
Valuation
Designee
performs
the
following
functions
in
performing
fair
value
determinations:
assesses
and
manages
valuation
risks;
establishes
and
applies
fair
value
methodologies;
tests
fair
value
methodologies;
and
evaluates
pricing
vendors
and
pricing
agents.
The
duties
and
responsibilities
of
the
Valuation
Designee
are
performed
by
its
Valuation
Committee. The
Valuation
Designee provides
periodic
reporting
to
the
Board
on
valuation
matters.
Various
valuation
techniques
and
inputs
are
used
to
determine
the
fair
value
of
financial
instruments.
GAAP
establishes
the
following
fair
value
hierarchy
that
categorizes
the
inputs
used
to
measure
fair
value:
Level
1
–
quoted
prices
(unadjusted)
in
active
markets
for
identical
financial
instruments
that
the
fund
can
access
at
the
reporting
date
Level
2
–
inputs
other
than
Level
1
quoted
prices
that
are
observable,
either
directly
or
indirectly
(including,
but
not
limited
to,
quoted
prices
for
similar
financial
instruments
in
active
markets,
quoted
prices
for
identical
or
similar
financial
instruments
in
inactive
markets,
interest
rates
and
yield
curves,
implied
volatilities,
and
credit
spreads)
Level
3
–
unobservable
inputs
(including
the Valuation
Designee’s assumptions
in
determining
fair
value)
T.
ROWE
PRICE
Mid-Cap
Index
Fund
20
Observable
inputs
are
developed
using
market
data,
such
as
publicly
available
information
about
actual
events
or
transactions,
and
reflect
the
assumptions
that
market
participants
would
use
to
price
the
financial
instrument.
Unobservable
inputs
are
those
for
which
market
data
are
not
available
and
are
developed
using
the
best
information
available
about
the
assumptions
that
market
participants
would
use
to
price
the
financial
instrument.
GAAP
requires
valuation
techniques
to
maximize
the
use
of
relevant
observable
inputs
and
minimize
the
use
of
unobservable
inputs.
When
multiple
inputs
are
used
to
derive
fair
value,
the
financial
instrument
is
assigned
to
the
level
within
the
fair
value
hierarchy
based
on
the
lowest-level
input
that
is
significant
to
the
fair
value
of
the
financial
instrument.
Input
levels
are
not
necessarily
an
indication
of
the
risk
or
liquidity
associated
with
financial
instruments
at
that
level
but
rather
the
degree
of
judgment
used
in
determining
those
values.
Valuation
Techniques 
Equity
securities,
including
exchange-traded
funds, listed
or
regularly
traded
on
a
securities
exchange
or
in
the
over-the-counter
(OTC)
market
are
valued
at
the
last
quoted
sale
price
or,
for
certain
markets,
the
official
closing
price
at
the
time
the
valuations
are
made.
OTC
Bulletin
Board
securities
are
valued
at
the
mean
of
the
closing
bid
and
asked
prices.
A
security
that
is
listed
or
traded
on
more
than
one
exchange
is
valued
at
the
quotation
on
the
exchange
determined
to
be
the
primary
market
for
such
security.
Listed
securities
not
traded
on
a
particular
day
are
valued
at
the
mean
of
the
closing
bid
and
asked
prices
for
domestic
securities.
Investments
in
mutual
funds
are
valued
at
the
mutual
fund’s
closing
NAV
per
share
on
the
day
of
valuation.
Investments
for
which
market
quotations are
not
readily
available
or
deemed
unreliable
are
valued
at
fair
value
as
determined
in
good
faith
by
the
Valuation
Designee.
The
Valuation
Designee
has
adopted
methodologies
for
determining
the
fair
value
of
investments
for
which
market
quotations
are
not
readily
available
or
deemed
unreliable,
including
the
use
of
other
pricing
sources.
Factors
used
in
determining
fair
value
vary
by
type
of
investment
and
may
include
market
or
investment
specific
considerations.
The
Valuation
Designee typically
will
afford
greatest
weight
to
actual
prices
in
arm’s
length
transactions,
to
the
extent
they
represent
orderly
transactions
between
market
participants,
transaction
information
can
be
reliably
obtained,
and
prices
are
deemed
representative
of
fair
value.
However,
the
Valuation
Designee may
also
consider
other
valuation
methods
such
as
market-based
valuation
multiples;
a
discount
or
premium
from
market
value
of
a
similar,
freely
traded
security
of
the
same
issuer;
discounted
cash
flows;
yield
to
maturity;
or
some
combination.
Fair
value
determinations
are
reviewed
on
a
regular
basis.
Because
any
fair
value
determination
involves
a
significant
amount
of
judgment,
there
is
a
degree
of
subjectivity
inherent
in
such
pricing
decisions. Fair
value
T.
ROWE
PRICE
Mid-Cap
Index
Fund
21
prices
determined
by
the
Valuation
Designee could
differ
from
those
of
other
market
participants,
and
it
is
possible
that
the
fair
value
determined
for
a
security
may
be
materially
different
from
the
value
that
could
be
realized
upon
the
sale
of
that
security.
Valuation
Inputs
  The
following
table
summarizes
the
fund’s
financial
instruments,
based
on
the
inputs
used
to
determine
their
fair
values
on
March
31,
2023
(for
further
detail
by
category,
please
refer
to
the
accompanying
Portfolio
of
Investments):
OTHER
MATTERS 
Unpredictable
events
such
as
environmental
or
natural
disasters,
war,
terrorism,
pandemics,
outbreaks
of
infectious
diseases,
and
similar
public
health
threats
may
significantly
affect
the
economy
and
the
markets
and
issuers
in
which
the fund
invests.
Certain
events
may
cause
instability
across
global
markets,
including
reduced
liquidity
and
disruptions
in
trading
markets,
while
some
events
may
affect
certain
geographic
regions,
countries,
sectors,
and
industries
more
significantly
than
others,
and
exacerbate
other
pre-existing
political,
social,
and
economic
risks.
Since
2020,
a
novel
strain
of
coronavirus
(COVID-19)
has
resulted
in
disruptions
to
global
business
activity
and
caused
significant
volatility
and
declines
in
global
financial
markets.
In
February
2022,
Russian
forces
entered
Ukraine
and
commenced
an
armed
conflict
leading
to
economic
sanctions
being
imposed
on
Russia
and
certain
of
its
citizens,
creating
impacts
on
Russian-related
stocks
and
debt
and
greater
volatility
in
global
markets.
In
March
2023,
the
collapse
of
some
US
regional
and
global
banks
as
well
as
overall
concerns
around
the
soundness
and
stability
of
the
global
banking
sector
has
sparked
concerns
of
a
broader
financial
crisis
impacting
the
overall
global
banking
sector.
In
($000s)
Level
1
Level
2
Level
3
Total
Value
Assets
Common
Stocks
$
107,456‌
$
45‌
$
—‌
$
107,501‌
Short-Term
Investments
61‌
—‌
—‌
61‌
Securities
Lending
Collateral
1,735‌
—‌
—‌
1,735‌
Total
$
109,252‌
$
45‌
$
—‌
$
109,297‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
22
certain
cases,
government
agencies
have
assumed
control
or
otherwise
intervened
in
the
operations
of
certain
banks
due
to
liquidity
and
solvency
concerns.
The
extent
of
impact
of
these
events
on
the
US
and
global
markets
is
highly
uncertain.
These
are
recent
examples
of
global
events
which
may
have
a
negative
impact
on
the
values
of
certain
portfolio
holdings
or
the
fund’s
overall
performance.
Management
is
actively
monitoring
the
risks
and
financial
impacts
arising
from
these
events.