NPORT-EX 2 70HETRP093023.htm T. ROWE PRICE INDEX TRUST, INC.
T.
ROWE
PRICE
Mid-Cap
Index
Fund
September
30,
2023
(Unaudited)
1
Portfolio
of
Investments
‡
Shares
$
Value
(Cost
and
value
in
$000s)
‡
COMMON
STOCKS
100.0%
COMMUNICATION
SERVICES
4.6%
Diversified
Telecommunication
Services
0.2%
Frontier
Communications
Parent (1)
8,161‌
128‌
GCI
Liberty,
Class
A,
EC (2)
203‌
—‌
Iridium
Communications 
4,201‌
191‌
319‌
Entertainment
1.8%
AMC
Entertainment
Holdings,
Class
A (1)
1,812‌
15‌
Liberty
Media
Corp-Liberty
Formula
One,
Class
A (1)
778‌
44‌
Liberty
Media
Corp-Liberty
Formula
One,
Class
C (1)
6,513‌
406‌
Liberty
Media
Corp-Liberty
Live,
Class
A (1)
619‌
20‌
Liberty
Media
Corp-Liberty
Live,
Class
C (1)
1,563‌
50‌
Madison
Square
Garden
Sports 
626‌
110‌
Playtika
Holding (1)
647‌
6‌
ROBLOX,
Class
A (1)(3)
15,426‌
447‌
Roku (1)
4,155‌
293‌
Spotify
Technology (1)
4,740‌
733‌
TKO
Group
Holdings (3)
1,437‌
121‌
2,245‌
Interactive
Media
&
Services
0.7%
IAC (1)
2,496‌
126‌
Pinterest,
Class
A (1)
19,944‌
539‌
TripAdvisor (1)
3,718‌
62‌
ZoomInfo
Technologies (1)
10,432‌
171‌
898‌
Media
1.9%
Cable
One 
189‌
116‌
DISH
Network,
Class
A (1)(3)
8,289‌
49‌
Liberty
Broadband,
Class
A (1)
552‌
50‌
Liberty
Broadband,
Class
C (1)
3,927‌
359‌
Liberty
Media
Corp-Liberty
SiriusXM (1)
5,174‌
132‌
Liberty
Media
Corp-Liberty
SiriusXM,
Class
A (1)
2,486‌
63‌
New
York
Times,
Class
A 
5,437‌
224‌
Nexstar
Media
Group,
Class
A 
1,153‌
165‌
Sirius
XM
Holdings (3)
21,699‌
98‌
Trade
Desk,
Class
A (1)
14,901‌
1,165‌
2,421‌
Total
Communication
Services
5,883‌
CONSUMER
DISCRETIONARY
11.9%
Automobile
Components
0.5%
Gentex 
7,889‌
257‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
2
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Lear 
1,977‌
265‌
Phinia 
1,562‌
42‌
QuantumScape (1)(3)
9,851‌
66‌
630‌
Automobiles
0.8%
Harley-Davidson 
4,373‌
145‌
Lucid
Group (1)(3)
24,860‌
139‌
Rivian
Automotive,
Class
A (1)(3)
22,285‌
541‌
Thor
Industries 
1,713‌
163‌
988‌
Broadline
Retail
0.8%
Coupang,
Class
A (1)
37,050‌
630‌
Kohl's 
3,700‌
77‌
Macy's 
9,114‌
106‌
Nordstrom (3)
3,820‌
57‌
Ollie's
Bargain
Outlet
Holdings (1)
2,059‌
159‌
1,029‌
Diversified
Consumer
Services
0.7%
ADT 
7,037‌
42‌
Bright
Horizons
Family
Solutions (1)
1,919‌
156‌
Grand
Canyon
Education (1)
1,007‌
118‌
H&R
Block 
5,116‌
220‌
Mister
Car
Wash (1)(3)
2,285‌
13‌
Service
Corp
International 
4,951‌
283‌
832‌
Hotels,
Restaurants
&
Leisure
2.9%
Aramark 
7,897‌
274‌
Boyd
Gaming 
2,453‌
149‌
Cava
Group (1)(3)
540‌
16‌
Choice
Hotels
International (3)
1,024‌
125‌
Churchill
Downs 
2,398‌
278‌
DoorDash,
Class
A (1)
10,150‌
807‌
DraftKings,
Class
A (1)
14,137‌
416‌
Hyatt
Hotels,
Class
A 
1,533‌
163‌
Marriott
Vacations
Worldwide 
1,230‌
124‌
Penn
Entertainment (1)
5,164‌
118‌
Planet
Fitness,
Class
A (1)
2,844‌
140‌
Texas
Roadhouse 
2,251‌
216‌
Travel
+
Leisure 
2,421‌
89‌
Vail
Resorts 
1,292‌
287‌
Wendy's 
5,763‌
118‌
Wingstop 
1,011‌
182‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
3
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Wyndham
Hotels
&
Resorts 
2,831‌
197‌
3,699‌
Household
Durables
0.8%
Leggett
&
Platt 
4,463‌
114‌
Newell
Brands 
12,816‌
116‌
Tempur
Sealy
International 
5,616‌
243‌
Toll
Brothers 
3,676‌
272‌
TopBuild (1)
1,066‌
268‌
1,013‌
Leisure
Products
0.7%
Brunswick 
2,372‌
187‌
Mattel (1)
11,849‌
261‌
Peloton
Interactive,
Class
A (1)(3)
10,606‌
54‌
Polaris 
1,816‌
189‌
YETI
Holdings (1)(3)
2,892‌
140‌
831‌
Specialty
Retail
2.4%
Advance
Auto
Parts (3)
2,002‌
112‌
AutoNation (1)
991‌
150‌
Burlington
Stores (1)
2,167‌
293‌
Dick's
Sporting
Goods 
2,024‌
220‌
Five
Below (1)
1,848‌
297‌
Floor
&
Decor
Holdings,
Class
A (1)(3)
3,492‌
316‌
GameStop,
Class
A (1)
8,944‌
147‌
Gap (3)
6,507‌
69‌
Lithia
Motors 
912‌
269‌
Murphy
USA 
665‌
227‌
Penske
Automotive
Group 
668‌
112‌
Petco
Health
&
Wellness (1)(3)
2,427‌
10‌
RH (1)
582‌
154‌
Valvoline 
5,571‌
180‌
Victoria's
Secret (1)
2,518‌
42‌
Wayfair,
Class
A (1)(3)
2,778‌
168‌
Williams-Sonoma 
2,149‌
334‌
3,100‌
Textiles,
Apparel
&
Luxury
Goods
2.3%
Capri
Holdings (1)
3,849‌
203‌
Carter's (3)
1,239‌
86‌
Columbia
Sportswear 
1,204‌
89‌
Crocs (1)
2,034‌
179‌
Deckers
Outdoor (1)
880‌
452‌
Lululemon
Athletica (1)
3,762‌
1,451‌
PVH 
2,084‌
159‌
Skechers
USA,
Class
A (1)
4,486‌
220‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
4
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Under
Armour,
Class
A (1)
6,311‌
43‌
Under
Armour,
Class
C (1)
6,767‌
43‌
2,925‌
Total
Consumer
Discretionary
15,047‌
CONSUMER
STAPLES
2.6%
Beverages
0.3%
Boston
Beer,
Class
A (1)
313‌
122‌
Celsius
Holdings (1)
1,605‌
275‌
397‌
Consumer
Staples
Distribution
&
Retail
1.3%
Albertsons,
Class
A 
14,049‌
320‌
BJ's
Wholesale
Club
Holdings (1)
4,463‌
319‌
Casey's
General
Stores 
1,249‌
339‌
Grocery
Outlet
Holding (1)
3,197‌
92‌
Performance
Food
Group (1)
5,166‌
304‌
U.S.
Foods
Holding (1)
7,640‌
303‌
1,677‌
Food
Products
0.8%
Darling
Ingredients (1)
5,344‌
279‌
Flowers
Foods 
6,271‌
139‌
Freshpet (1)
1,539‌
101‌
Ingredion 
2,222‌
219‌
Pilgrim's
Pride (1)
1,374‌
31‌
Post
Holdings (1)
1,788‌
153‌
Seaboard 
9‌
34‌
956‌
Household
Products
0.1%
Reynolds
Consumer
Products 
1,818‌
46‌
Spectrum
Brands
Holdings 
1,352‌
106‌
152‌
Personal
Care
Products
0.1%
Coty,
Class
A (1)
12,017‌
132‌
Olaplex
Holdings (1)
3,717‌
7‌
139‌
Total
Consumer
Staples
3,321‌
ENERGY
3.6%
Energy
Equipment
&
Services
0.5%
NOV 
13,227‌
276‌
TechnipFMC 
14,802‌
301‌
577‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
5
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Oil,
Gas
&
Consumable
Fuels
3.1%
Antero
Midstream 
11,311‌
135‌
Antero
Resources (1)
9,520‌
242‌
Cheniere
Energy 
8,200‌
1,361‌
Chesapeake
Energy (3)
4,259‌
367‌
DT
Midstream 
3,244‌
172‌
HF
Sinclair 
4,761‌
271‌
New
Fortress
Energy (3)
2,168‌
71‌
Ovintiv 
8,621‌
410‌
Range
Resources 
7,880‌
255‌
Southwestern
Energy (1)
36,934‌
238‌
Texas
Pacific
Land 
194‌
354‌
3,876‌
Total
Energy
4,453‌
FINANCIALS
16.2%
Banks
3.1%
Bank
OZK 
3,600‌
134‌
BOK
Financial 
954‌
76‌
Columbia
Banking
System 
6,935‌
141‌
Commerce
Bancshares 
3,822‌
183‌
Cullen/Frost
Bankers 
1,979‌
181‌
East
West
Bancorp 
4,728‌
249‌
First
Citizens
BancShares,
Class
A 
366‌
505‌
First
Hawaiian 
4,283‌
77‌
First
Horizon 
18,727‌
206‌
FNB 
11,919‌
129‌
New
York
Community
Bancorp 
24,011‌
272‌
NU
Holdings,
Class
A (1)
77,555‌
562‌
Pinnacle
Financial
Partners 
2,535‌
170‌
Popular 
2,351‌
148‌
Prosperity
Bancshares 
2,911‌
159‌
Synovus
Financial 
4,825‌
134‌
Webster
Financial 
5,844‌
236‌
Western
Alliance
Bancorp 
3,615‌
166‌
Wintrust
Financial 
2,032‌
154‌
3,882‌
Capital
Markets
4.8%
Affiliated
Managers
Group 
1,190‌
155‌
Ares
Management,
Class
A 
5,387‌
554‌
Blue
Owl
Capital (3)
14,953‌
194‌
Carlyle
Group 
7,103‌
214‌
Coinbase
Global,
Class
A (1)
5,637‌
423‌
Evercore,
Class
A 
1,200‌
166‌
Houlihan
Lokey 
1,692‌
181‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
6
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Interactive
Brokers
Group,
Class
A 
3,408‌
295‌
Janus
Henderson
Group 
4,509‌
117‌
Jefferies
Financial
Group 
6,402‌
235‌
KKR 
21,841‌
1,345‌
Lazard,
Class
A 
3,687‌
114‌
LPL
Financial
Holdings 
2,638‌
627‌
Morningstar 
865‌
203‌
Robinhood
Markets,
Class
A (1)
22,352‌
219‌
SEI
Investments 
3,427‌
206‌
Stifel
Financial 
3,456‌
212‌
TPG (3)
2,148‌
65‌
Tradeweb
Markets,
Class
A 
3,870‌
310‌
Virtu
Financial,
Class
A 
2,991‌
52‌
XP,
Class
A 
11,200‌
258‌
6,145‌
Consumer
Finance
0.7%
Ally
Financial 
9,109‌
243‌
Credit
Acceptance (1)
212‌
98‌
OneMain
Holdings 
3,746‌
150‌
SLM 
7,576‌
103‌
SoFi
Technologies,
Class
A (1)(3)
30,873‌
247‌
841‌
Financial
Services
3.4%
Affirm
Holdings (1)(3)
7,269‌
155‌
Apollo
Global
Management 
17,642‌
1,584‌
Block,
Class
A (1)
18,243‌
808‌
Corebridge
Financial 
4,983‌
98‌
Equitable
Holdings 
12,056‌
342‌
Euronet
Worldwide (1)
1,577‌
125‌
MGIC
Investment 
9,512‌
159‌
Rocket,
Class
A (1)
4,190‌
34‌
Shift4
Payments,
Class
A (1)(3)
1,831‌
101‌
TFS
Financial 
1,581‌
19‌
Toast,
Class
A (1)(3)
11,928‌
223‌
UWM
Holdings 
2,864‌
14‌
Voya
Financial 
3,298‌
219‌
Western
Union 
12,511‌
165‌
WEX (1)
1,434‌
270‌
4,316‌
Insurance
3.5%
American
Financial
Group 
2,454‌
274‌
Assured
Guaranty 
1,915‌
116‌
Axis
Capital
Holdings 
2,595‌
146‌
Brighthouse
Financial (1)
2,246‌
110‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
7
Shares
$
Value
(Cost
and
value
in
$000s)
‡
CNA
Financial 
871‌
34‌
Fidelity
National
Financial 
8,709‌
360‌
First
American
Financial 
3,376‌
191‌
Hanover
Insurance
Group 
1,184‌
132‌
Kemper 
2,027‌
85‌
Kinsale
Capital
Group 
735‌
304‌
Lincoln
National 
5,638‌
139‌
Markel
Group (1)
443‌
652‌
Old
Republic
International 
9,042‌
244‌
Primerica 
1,222‌
237‌
Reinsurance
Group
of
America 
2,231‌
324‌
RenaissanceRe
Holdings 
1,686‌
334‌
RLI 
1,355‌
184‌
Ryan
Specialty
Holdings (1)
3,099‌
150‌
Unum
Group 
6,626‌
326‌
White
Mountains
Insurance
Group 
83‌
124‌
4,466‌
Mortgage
Real
Estate
Investment
Trusts
0.7%
AGNC
Investment,
REIT (3)
20,015‌
189‌
Annaly
Capital
Management,
REIT 
16,650‌
313‌
Rithm
Capital,
REIT 
16,092‌
150‌
Starwood
Property
Trust,
REIT (3)
9,926‌
192‌
844‌
Total
Financials
20,494‌
HEALTH
CARE
10.7%
Biotechnology
4.6%
Alnylam
Pharmaceuticals (1)
4,186‌
741‌
Apellis
Pharmaceuticals (1)
3,325‌
126‌
BioMarin
Pharmaceutical (1)
6,290‌
556‌
Exact
Sciences (1)
6,038‌
412‌
Exelixis (1)
10,799‌
236‌
Horizon
Therapeutics (1)
7,574‌
876‌
Ionis
Pharmaceuticals (1)(3)
4,797‌
218‌
Karuna
Therapeutics (1)
1,198‌
203‌
Mirati
Therapeutics (1)
1,528‌
67‌
Natera (1)
3,489‌
154‌
Neurocrine
Biosciences (1)
3,244‌
365‌
Roivant
Sciences (1)
11,607‌
136‌
Sarepta
Therapeutics (1)
3,003‌
364‌
Seagen (1)
4,738‌
1,005‌
Ultragenyx
Pharmaceutical (1)
2,277‌
81‌
United
Therapeutics (1)
1,523‌
344‌
5,884‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
8
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Health
Care
Equipment
&
Supplies
1.3%
Enovis (1)
1,767‌
93‌
Envista
Holdings (1)
5,469‌
153‌
Globus
Medical,
Class
A (1)
3,993‌
198‌
ICU
Medical (1)
680‌
81‌
Inspire
Medical
Systems (1)
969‌
192‌
Integra
LifeSciences
Holdings (1)
2,405‌
92‌
Masimo (1)
1,440‌
126‌
Novocure (1)
3,513‌
57‌
Penumbra (1)
1,217‌
295‌
QuidelOrtho (1)
1,783‌
130‌
Shockwave
Medical (1)
1,222‌
243‌
Tandem
Diabetes
Care (1)
2,157‌
45‌
1,705‌
Health
Care
Providers
&
Services
1.1%
Acadia
Healthcare (1)
3,023‌
212‌
agilon
health (1)(3)
9,718‌
173‌
Amedisys (1)
1,080‌
101‌
Chemed 
491‌
255‌
Encompass
Health 
3,325‌
223‌
Premier,
Class
A 
3,993‌
86‌
R1
RCM (1)
5,147‌
78‌
Tenet
Healthcare (1)
3,398‌
224‌
1,352‌
Health
Care
Technology
1.0%
Certara (1)
3,998‌
58‌
Doximity,
Class
A (1)
4,035‌
86‌
Teladoc
Health (1)
5,489‌
102‌
Veeva
Systems,
Class
A (1)
4,897‌
996‌
1,242‌
Life
Sciences
Tools
&
Services
2.0%
10X
Genomics,
Class
A (1)
3,060‌
126‌
Avantor (1)
22,673‌
478‌
Azenta (1)
2,137‌
107‌
Bruker 
3,576‌
223‌
Fortrea
Holdings (1)
2,982‌
85‌
ICON (1)
2,756‌
679‌
Maravai
LifeSciences
Holdings,
Class
A (1)
3,678‌
37‌
Medpace
Holdings (1)
784‌
190‌
QIAGEN (1)
7,668‌
311‌
Repligen (1)
1,863‌
296‌
Sotera
Health (1)(3)
3,306‌
49‌
2,581‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
9
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Pharmaceuticals
0.7%
Elanco
Animal
Health (1)
16,394‌
184‌
Jazz
Pharmaceuticals (1)
2,058‌
266‌
Perrigo 
4,504‌
144‌
Royalty
Pharma,
Class
A 
12,524‌
340‌
934‌
Total
Health
Care
13,698‌
INDUSTRIALS
&
BUSINESS
SERVICES
18.8%
Aerospace
&
Defense
1.3%
BWX
Technologies 
3,075‌
231‌
Curtiss-Wright 
1,286‌
252‌
HEICO 
1,522‌
246‌
HEICO,
Class
A 
2,681‌
346‌
Hexcel 
2,840‌
185‌
Mercury
Systems (1)
1,659‌
62‌
Spirit
AeroSystems
Holdings,
Class
A (3)
3,500‌
56‌
Woodward 
1,991‌
247‌
1,625‌
Air
Freight
&
Logistics
0.2%
GXO
Logistics (1)
3,940‌
231‌
231‌
Building
Products
2.2%
Advanced
Drainage
Systems 
2,300‌
262‌
Armstrong
World
Industries 
1,509‌
108‌
AZEK,
Class
A (1)
4,398‌
131‌
Builders
FirstSource (1)
4,279‌
533‌
Carlisle 
1,678‌
435‌
Fortune
Brands
Innovations 
4,263‌
265‌
Hayward
Holdings (1)
4,445‌
63‌
Lennox
International 
1,073‌
402‌
Owens
Corning 
3,015‌
411‌
Trex (1)
3,656‌
225‌
2,835‌
Commercial
Services
&
Supplies
1.0%
Clean
Harbors (1)
1,697‌
284‌
Driven
Brands
Holdings (1)
2,080‌
26‌
MSA
Safety 
1,242‌
196‌
RB
Global 
6,100‌
381‌
Stericycle (1)
3,074‌
137‌
Tetra
Tech 
1,786‌
272‌
1,296‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
10
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Construction
&
Engineering
1.1%
AECOM 
4,394‌
365‌
EMCOR
Group 
1,574‌
331‌
MasTec (1)
2,096‌
151‌
MDU
Resources 
6,740‌
132‌
Valmont
Industries 
700‌
168‌
WillScot
Mobile
Mini
Holdings (1)
6,631‌
276‌
1,423‌
Electrical
Equipment
1.8%
Acuity
Brands 
1,053‌
179‌
ChargePoint
Holdings (1)(3)
10,003‌
50‌
Hubbell 
1,812‌
568‌
nVent
Electric 
5,547‌
294‌
Plug
Power (1)(3)
17,538‌
133‌
Regal
Rexnord 
2,219‌
317‌
Sensata
Technologies
Holding 
5,082‌
192‌
Sunrun (1)(3)
7,107‌
89‌
Vertiv
Holdings 
11,605‌
432‌
2,254‌
Ground
Transportation
3.8%
Avis
Budget
Group (1)
689‌
124‌
Hertz
Global
Holdings (1)
4,502‌
55‌
Knight-Swift
Transportation
Holdings 
5,257‌
264‌
Landstar
System 
1,198‌
212‌
Lyft,
Class
A (1)
11,313‌
119‌
Ryder
System 
1,514‌
162‌
Saia (1)
892‌
356‌
Schneider
National,
Class
B 
1,833‌
51‌
Uber
Technologies (1)
65,371‌
3,006‌
U-Haul
Holding 
3,387‌
177‌
U-Haul
Holding (1)(3)
237‌
13‌
XPO (1)
3,840‌
287‌
4,826‌
Machinery
2.9%
AGCO 
2,107‌
249‌
Allison
Transmission
Holdings 
3,038‌
179‌
CNH
Industrial 
32,942‌
399‌
Crane 
1,601‌
142‌
Donaldson 
4,076‌
243‌
Esab 
1,882‌
132‌
Flowserve 
4,374‌
174‌
Gates
Industrial (1)
3,541‌
41‌
Graco 
5,612‌
409‌
ITT 
2,782‌
272‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
11
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Lincoln
Electric
Holdings 
1,873‌
341‌
Middleby (1)
1,791‌
229‌
Oshkosh 
2,195‌
210‌
RBC
Bearings (1)(3)
953‌
223‌
Timken 
2,089‌
154‌
Toro 
3,509‌
292‌
3,689‌
Marine
Transportation
0.1%
Kirby (1)
1,991‌
165‌
165‌
Professional
Services
2.5%
Booz
Allen
Hamilton
Holding 
4,369‌
477‌
CACI
International,
Class
A (1)
760‌
239‌
Clarivate (1)(3)
15,858‌
106‌
Concentrix 
1,480‌
119‌
Dun
&
Bradstreet
Holdings 
9,176‌
92‌
FTI
Consulting (1)
1,113‌
199‌
Genpact 
6,039‌
219‌
KBR 
4,553‌
268‌
ManpowerGroup 
1,679‌
123‌
Paycor
HCM (1)(3)
1,850‌
42‌
Paylocity
Holding (1)
1,416‌
257‌
Science
Applications
International 
1,810‌
191‌
SS&C
Technologies
Holdings 
7,297‌
383‌
TransUnion 
6,490‌
466‌
3,181‌
Trading
Companies
&
Distributors
1.9%
Air
Lease 
3,451‌
136‌
Core
&
Main,
Class
A (1)
3,610‌
104‌
Ferguson 
6,978‌
1,148‌
MSC
Industrial
Direct,
Class
A 
1,534‌
151‌
SiteOne
Landscape
Supply (1)
1,498‌
245‌
Watsco (3)
1,115‌
421‌
WESCO
International 
1,489‌
214‌
2,419‌
Total
Industrials
&
Business
Services
23,944‌
INFORMATION
TECHNOLOGY
20.8%
Communications
Equipment
0.3%
Ciena (1)
4,994‌
236‌
Lumentum
Holdings (1)
2,301‌
104‌
Ubiquiti (3)
131‌
19‌
Viasat (1)(3)
3,913‌
72‌
431‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
12
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Electronic
Equipment,
Instruments
&
Components
1.8%
Arrow
Electronics (1)
1,929‌
242‌
Avnet 
3,033‌
146‌
Cognex 
5,816‌
247‌
Coherent (1)
3,973‌
130‌
Crane
NXT 
1,621‌
90‌
IPG
Photonics (1)
1,010‌
102‌
Jabil 
4,287‌
544‌
Littelfuse 
810‌
200‌
National
Instruments 
4,417‌
263‌
TD
SYNNEX 
1,388‌
139‌
Vontier 
5,202‌
161‌
2,264‌
IT
Services
3.8%
Amdocs 
3,992‌
337‌
Cloudflare,
Class
A (1)
9,670‌
610‌
Globant (1)
1,383‌
274‌
GoDaddy,
Class
A (1)
5,177‌
386‌
Kyndryl
Holdings (1)
7,651‌
115‌
MongoDB (1)
2,220‌
768‌
Okta (1)
5,044‌
411‌
Snowflake,
Class
A (1)
10,481‌
1,601‌
Twilio,
Class
A (1)
5,709‌
334‌
4,836‌
Semiconductors
&
Semiconductor
Equipment
2.7%
Allegro
MicroSystems (1)
2,511‌
80‌
Cirrus
Logic (1)
1,841‌
136‌
Entegris 
5,018‌
471‌
GLOBALFOUNDRIES (1)(3)
2,620‌
153‌
Lattice
Semiconductor (1)
4,574‌
393‌
Marvell
Technology 
28,900‌
1,564‌
MKS
Instruments 
2,236‌
194‌
Universal
Display 
1,575‌
247‌
Wolfspeed (1)(3)
4,144‌
158‌
3,396‌
Software
11.9%
Alteryx,
Class
A (1)(3)
2,050‌
77‌
AppLovin,
Class
A (1)
7,084‌
283‌
Aspen
Technology (1)
933‌
191‌
Atlassian,
Class
A (1)
4,894‌
986‌
Bentley
Systems,
Class
B 
6,481‌
325‌
BILL
Holdings (1)
3,443‌
374‌
CCC
Intelligent
Solutions
Holdings (1)
6,776‌
90‌
Confluent,
Class
A (1)
6,236‌
185‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
13
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Crowdstrike
Holdings,
Class
A (1)
7,119‌
1,192‌
Datadog,
Class
A (1)
9,188‌
837‌
DocuSign (1)
6,822‌
287‌
Dolby
Laboratories,
Class
A 
1,976‌
157‌
DoubleVerify
Holdings (1)
4,211‌
118‌
Dropbox,
Class
A (1)
8,694‌
237‌
Dynatrace (1)
8,073‌
377‌
Elastic (1)
2,603‌
211‌
Five9 (1)
2,375‌
153‌
Gitlab,
Class
A (1)
2,925‌
132‌
Guidewire
Software (1)
2,746‌
247‌
HashiCorp,
Class
A (1)
3,257‌
74‌
HubSpot (1)
1,545‌
761‌
Informatica,
Class
A (1)
1,423‌
30‌
Manhattan
Associates (1)
2,070‌
409‌
nCino (1)
2,335‌
74‌
NCR (1)
4,298‌
116‌
New
Relic (1)
1,876‌
161‌
Nutanix,
Class
A (1)
7,745‌
270‌
Palantir
Technologies,
Class
A (1)
63,047‌
1,009‌
Pegasystems (3)
1,403‌
61‌
Procore
Technologies (1)
2,625‌
171‌
RingCentral,
Class
A (1)
2,873‌
85‌
SentinelOne,
Class
A (1)
7,671‌
129‌
Smartsheet,
Class
A (1)
4,195‌
170‌
Splunk (1)
5,163‌
755‌
Teradata (1)
3,355‌
151‌
UiPath,
Class
A (1)
12,653‌
217‌
Unity
Software (1)
9,692‌
304‌
VMware,
Class
A (1)
7,275‌
1,211‌
Workday,
Class
A (1)
6,690‌
1,437‌
Zoom
Video
Communications,
Class
A (1)
8,436‌
590‌
Zscaler (1)
2,951‌
459‌
15,103‌
Technology
Hardware,
Storage
&
Peripherals
0.3%
Pure
Storage,
Class
A (1)
9,484‌
338‌
338‌
Total
Information
Technology
26,368‌
MATERIALS
4.2%
Chemicals
1.4%
Ashland 
1,581‌
129‌
Axalta
Coating
Systems (1)
7,455‌
201‌
Chemours 
4,959‌
139‌
Element
Solutions 
7,452‌
146‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
14
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Ginkgo
Bioworks
Holdings,
Class
A (1)
51,712‌
94‌
Huntsman 
5,699‌
139‌
NewMarket 
207‌
94‌
Olin 
4,349‌
217‌
RPM
International 
4,272‌
405‌
Scotts
Miracle-Gro (3)
1,390‌
72‌
Westlake 
1,080‌
135‌
1,771‌
Construction
Materials
0.2%
Eagle
Materials 
1,185‌
197‌
197‌
Containers
&
Packaging
1.1%
AptarGroup 
2,206‌
276‌
Ardagh
Metal
Packaging (3)
4,410‌
14‌
Berry
Global
Group 
4,014‌
248‌
Crown
Holdings 
3,578‌
317‌
Graphic
Packaging
Holding 
10,252‌
228‌
Silgan
Holdings 
2,784‌
120‌
Sonoco
Products 
3,294‌
179‌
1,382‌
Metals
&
Mining
1.4%
Alcoa 
5,943‌
173‌
Cleveland-Cliffs (1)
17,111‌
268‌
MP
Materials (1)(3)
3,482‌
67‌
Reliance
Steel
&
Aluminum 
1,965‌
515‌
Royal
Gold 
2,210‌
235‌
Southern
Copper 
2,872‌
216‌
SSR
Mining (3)
6,947‌
92‌
United
States
Steel 
7,457‌
242‌
1,808‌
Paper
&
Forest
Products
0.1%
Louisiana-Pacific 
2,165‌
120‌
120‌
Total
Materials
5,278‌
REAL
ESTATE
5.3%
Diversified
Real
Estate
Investment
Trusts
0.3%
WP
Carey,
REIT 
7,144‌
386‌
386‌
Health
Care
Real
Estate
Investment
Trusts
0.4%
Healthcare
Realty
Trust,
REIT 
12,797‌
195‌
Medical
Properties
Trust,
REIT (3)
19,996‌
109‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
15
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Omega
Healthcare
Investors,
REIT 
7,896‌
262‌
566‌
Hotel
&
Resort
Real
Estate
Investment
Trusts
0.1%
Park
Hotels
&
Resorts,
REIT 
7,215‌
89‌
89‌
Industrial
Real
Estate
Investment
Trusts
1.0%
Americold
Realty
Trust,
REIT 
9,106‌
277‌
EastGroup
Properties,
REIT 
1,477‌
246‌
First
Industrial
Realty
Trust,
REIT 
4,445‌
211‌
Rexford
Industrial
Realty,
REIT 
6,909‌
341‌
STAG
Industrial,
REIT 
6,048‌
209‌
1,284‌
Office
Real
Estate
Investment
Trusts
0.3%
Cousins
Properties,
REIT 
5,098‌
104‌
Highwoods
Properties,
REIT 
3,483‌
72‌
Kilroy
Realty,
REIT 
3,930‌
124‌
Vornado
Realty
Trust,
REIT (3)
5,896‌
134‌
434‌
Real
Estate
Management
&
Development
0.5%
Howard
Hughes
Holdings (1)
1,128‌
84‌
Jones
Lang
LaSalle (1)
1,596‌
225‌
Zillow
Group,
Class
A (1)
1,861‌
83‌
Zillow
Group,
Class
C (1)
5,200‌
240‌
632‌
Residential
Real
Estate
Investment
Trusts
1.1%
American
Homes
4
Rent,
Class
A,
REIT 
11,179‌
377‌
Apartment
Income
REIT,
REIT 
4,970‌
152‌
Equity
LifeStyle
Properties,
REIT 
5,966‌
380‌
Sun
Communities,
REIT 
4,131‌
489‌
1,398‌
Retail
Real
Estate
Investment
Trusts
0.6%
Agree
Realty,
REIT 
3,072‌
170‌
Brixmor
Property
Group,
REIT 
10,080‌
209‌
NNN
REIT,
REIT 
6,108‌
216‌
Spirit
Realty
Capital,
REIT 
4,759‌
160‌
755‌
Specialized
Real
Estate
Investment
Trusts
1.0%
CubeSmart,
REIT 
7,543‌
288‌
EPR
Properties,
REIT 
2,501‌
104‌
Gaming
&
Leisure
Properties,
REIT 
8,450‌
385‌
Lamar
Advertising,
Class
A,
REIT 
2,926‌
244‌
National
Storage
Affiliates
Trust,
REIT 
2,688‌
85‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
16
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Rayonier,
REIT 
4,899‌
139‌
1,245‌
Total
Real
Estate
6,789‌
UTILITIES
1.3%
Electric
Utilities
0.4%
Avangrid 
2,393‌
72‌
Hawaiian
Electric
Industries 
3,669‌
45‌
IDACORP 
1,687‌
158‌
OGE
Energy 
6,730‌
225‌
500‌
Gas
Utilities
0.2%
National
Fuel
Gas 
2,967‌
154‌
UGI 
6,984‌
161‌
315‌
Independent
Power
&
Renewable
Electricity
Producers
0.5%
Brookfield
Renewable,
Class
A 
4,434‌
106‌
Clearway
Energy,
Class
A 
1,103‌
22‌
Clearway
Energy,
Class
C 
2,742‌
58‌
Vistra 
12,383‌
411‌
597‌
Water
Utilities
0.2%
Essential
Utilities 
8,187‌
281‌
281‌
Total
Utilities
1,693‌
Total
Common
Stocks
(Cost
$134,614)
126,968‌
SHORT-TERM
INVESTMENTS
0.1%
Money
Market
Funds
0.1%
T.
Rowe
Price
Government
Reserve
Fund,
5.40% (4)(5)
126,376‌
126‌
Total
Short-Term
Investments
(Cost
$126)
126‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
17
Shares
$
Value
(Cost
and
value
in
$000s)
‡
SECURITIES
LENDING
COLLATERAL
4.5%
INVESTMENTS
IN
A
POOLED
ACCOUNT
THROUGH
SECURITIES
LENDING
PROGRAM
WITH
STATE
STREET
BANK
AND
TRUST
COMPANY
4.5%
Money
Market
Funds
4.5%
T.
Rowe
Price
Government
Reserve
Fund,
5.40% (4)(5)
5,714,248‌
5,714‌
Total
Investments
in
a
Pooled
Account
through
Securities
Lending
Program
with
State
Street
Bank
and
Trust
Company
5,714‌
Total
Securities
Lending
Collateral
(Cost
$5,714)
5,714‌
Total
Investments
in
Securities
104.6%
(Cost
$140,454)
$
132,808‌
Other
Assets
Less
Liabilities
(4.6)%
(5,798‌)
Net
Assets
100.0%
$
127,010‌
‡
Shares
are
denominated
in
U.S.
dollars
unless
otherwise
noted.
(1)
Non-income
producing
(2)
Level
3
in
fair
value
hierarchy.
(3)
All
or
a
portion
of
this
security
is
on
loan
at
September
30,
2023.
(4)
Seven-day
yield
(5)
Affiliated
Companies
EC
Escrow
CUSIP;
represents
a
beneficial
interest
in
a
residual
pool
of
assets;
the
amount
and
timing
of
future
distributions,
if
any,
is
uncertain;
when
presented,
interest
rate
and
maturity
date
are
those
of
the
original
security.
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
nine
months
ended
September
30,
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,
5.40%
$
—‌
$
—‌
$
8‌++
Totals
$
—‌#
$
—‌
$
8‌+
Supplementary
Investment
Schedule
Affiliate
Value
12/31/22
Purchase
Cost
Sales
Cost
Value
09/30/23
T.
Rowe
Price
Government
Reserve
Fund,
5.40%
$
2,015‌
 ¤
 ¤
$
5,840‌
Total
$
5,840‌^
#
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
$8
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
$5,840.
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
September
30,
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
$
126,968‌
$
—‌
$
—‌
$
126,968‌
Short-Term
Investments
126‌
—‌
—‌
126‌
Securities
Lending
Collateral
5,714‌
—‌
—‌
5,714‌
Total
$
132,808‌
$
—‌
$
—‌
$
132,808‌
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.