NPORT-EX 2 70HETRP033125.htm T. ROWE PRICE INDEX TRUST, INC.
T.
ROWE
PRICE
Mid-Cap
Index
Fund
March
31,
2025
(Unaudited)
1
Portfolio
of
Investments
‡
Shares
$
Value
(Cost
and
value
in
$000s)
‡
COMMON
STOCKS
 99.6%
COMMUNICATION
SERVICES
 6.0%
Diversified
Telecommunication
Services
 0.4%
Frontier
Communications
Parent (1)
14,401‌
517‌
GCI
Liberty,
Class
A,
EC (1)(2)
203‌
—‌
Iridium
Communications 
6,556‌
179‌
Liberty
Global,
Class
A (1)
9,743‌
112‌
Liberty
Global,
Class
C (1)
8,945‌
107‌
915‌
Entertainment
 3.6%
Liberty
Media
Corp-Liberty
Formula
One,
Class
A (1)
1,357‌
111‌
Liberty
Media
Corp-Liberty
Formula
One,
Class
C (1)
12,288‌
1,106‌
Liberty
Media
Corp-Liberty
Live,
Class
A (1)
1,137‌
76‌
Liberty
Media
Corp-Liberty
Live,
Class
C (1)
2,748‌
187‌
Madison
Square
Garden
Sports (1)
1,084‌
211‌
Playtika
Holding 
3,816‌
20‌
ROBLOX,
Class
A (1)
30,747‌
1,792‌
Roku (1)
7,417‌
523‌
Spotify
Technology (1)
8,605‌
4,733‌
8,759‌
Interactive
Media
&
Services
 0.7%
IAC (1)
4,339‌
199‌
Pinterest,
Class
A (1)
34,630‌
1,074‌
TripAdvisor (1)
6,270‌
89‌
Trump
Media
&
Technology
Group (1)
4,724‌
92‌
ZoomInfo
Technologies (1)
16,505‌
165‌
1,619‌
Media
 1.3%
Liberty
Broadband,
Class
A (1)
956‌
81‌
Liberty
Broadband,
Class
C (1)
6,478‌
551‌
New
York
Times,
Class
A 
9,409‌
466‌
Nexstar
Media
Group 
1,717‌
308‌
Sirius
XM
Holdings 
12,540‌
283‌
Trade
Desk,
Class
A (1)
26,146‌
1,431‌
3,120‌
Total
Communication
Services
14,413‌
CONSUMER
DISCRETIONARY
 10.8%
Automobile
Components
 0.4%
BorgWarner 
12,790‌
366‌
Gentex 
13,260‌
309‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
2
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Lear 
3,149‌
278‌
QuantumScape (1)(3)
20,960‌
87‌
1,040‌
Automobiles
 0.5%
Harley-Davidson 
6,719‌
170‌
Lucid
Group (1)(3)
57,177‌
138‌
Rivian
Automotive,
Class
A (1)(3)
49,535‌
617‌
Thor
Industries 
2,965‌
225‌
1,150‌
Broadline
Retail
 1.1%
Coupang (1)
67,821‌
1,487‌
Dillard's,
Class
A (3)
179‌
64‌
Etsy (1)
6,502‌
307‌
Kohl's 
6,412‌
53‌
Macy's 
15,971‌
201‌
Nordstrom 
5,905‌
144‌
Ollie's
Bargain
Outlet
Holdings (1)
3,567‌
415‌
2,671‌
Diversified
Consumer
Services
 1.1%
ADT 
21,733‌
177‌
Bright
Horizons
Family
Solutions (1)
3,373‌
428‌
Duolingo (1)
2,208‌
686‌
Grand
Canyon
Education (1)
1,675‌
290‌
H&R
Block 
8,012‌
440‌
Service
Corp.
International 
8,247‌
661‌
2,682‌
Hotels,
Restaurants
&
Leisure
 2.7%
Aramark 
15,361‌
530‌
Boyd
Gaming 
3,696‌
243‌
Cava
Group (1)
4,396‌
380‌
Choice
Hotels
International 
1,596‌
212‌
Churchill
Downs 
4,078‌
453‌
DraftKings,
Class
A (1)
26,534‌
881‌
Dutch
Bros,
Class
A (1)
6,396‌
395‌
Hyatt
Hotels,
Class
A 
2,390‌
293‌
Light
&
Wonder (1)
5,196‌
450‌
Marriott
Vacations
Worldwide 
2,032‌
131‌
Penn
Entertainment (1)
8,795‌
143‌
Planet
Fitness,
Class
A (1)
4,958‌
479‌
Texas
Roadhouse 
3,911‌
652‌
Travel
+
Leisure 
3,846‌
178‌
Vail
Resorts 
2,182‌
349‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
3
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Wendy's 
10,030‌
147‌
Wingstop 
1,709‌
385‌
Wyndham
Hotels
&
Resorts 
4,432‌
401‌
6,702‌
Household
Durables
 1.0%
Leggett
&
Platt 
7,729‌
61‌
Newell
Brands 
24,124‌
150‌
SharkNinja (1)
3,856‌
322‌
Somnigroup
International (3)
9,848‌
590‌
Toll
Brothers 
5,836‌
616‌
TopBuild (1)
1,723‌
525‌
Whirlpool 
3,083‌
278‌
2,542‌
Leisure
Products
 0.4%
Brunswick 
3,826‌
206‌
Mattel (1)
19,806‌
385‌
Polaris 
2,983‌
122‌
YETI
Holdings (1)
4,971‌
165‌
878‌
Specialty
Retail
 2.8%
Advance
Auto
Parts 
3,544‌
139‌
AutoNation (1)
1,482‌
240‌
Bath
&
Body
Works 
12,645‌
383‌
Burlington
Stores (1)
3,717‌
886‌
Carvana (1)
6,338‌
1,325‌
Dick's
Sporting
Goods 
3,285‌
662‌
Five
Below (1)
3,170‌
238‌
Floor
&
Decor
Holdings,
Class
A (1)
6,158‌
496‌
GameStop,
Class
A (1)
23,026‌
514‌
Gap 
11,832‌
244‌
Lithia
Motors 
1,534‌
450‌
Murphy
USA 
1,075‌
505‌
Penske
Automotive
Group 
1,079‌
155‌
RH (1)
882‌
207‌
Valvoline (1)
7,479‌
260‌
Wayfair,
Class
A (1)(3)
5,664‌
182‌
6,886‌
Textiles,
Apparel
&
Luxury
Goods
 0.8%
Amer
Sports (1)
3,680‌
98‌
Birkenstock
Holding (1)
2,308‌
106‌
Capri
Holdings (1)
6,667‌
132‌
Carter's 
2,091‌
86‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
4
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Columbia
Sportswear 
1,893‌
143‌
Crocs (1)
3,327‌
353‌
PVH 
3,235‌
209‌
Skechers
USA,
Class
A (1)
7,712‌
438‌
Under
Armour,
Class
A (1)
10,912‌
68‌
Under
Armour,
Class
C (1)
11,053‌
66‌
VF 
20,388‌
316‌
2,015‌
Total
Consumer
Discretionary
26,566‌
CONSUMER
STAPLES
 3.4%
Beverages
 0.4%
Boston
Beer,
Class
A (1)
504‌
120‌
Celsius
Holdings (1)
10,263‌
366‌
Coca-Cola
Consolidated 
352‌
475‌
961‌
Consumer
Staples
Distribution
&
Retail
 1.8%
Albertsons,
Class
A 
24,516‌
539‌
BJ's
Wholesale
Club
Holdings (1)
7,733‌
882‌
Casey's
General
Stores 
2,170‌
942‌
Grocery
Outlet
Holding (1)
5,510‌
77‌
Maplebear (1)
9,733‌
388‌
Performance
Food
Group (1)
8,963‌
705‌
U.S.
Foods
Holding (1)
12,753‌
835‌
4,368‌
Food
Products
 0.7%
Darling
Ingredients (1)
9,263‌
289‌
Flowers
Foods 
10,901‌
207‌
Freshpet (1)
2,715‌
226‌
Ingredion 
3,843‌
520‌
Pilgrim's
Pride (1)
2,454‌
134‌
Post
Holdings (1)
3,038‌
353‌
Seaboard 
14‌
38‌
Smithfield
Foods (1)
1,490‌
30‌
1,797‌
Household
Products
 0.1%
Reynolds
Consumer
Products 
3,148‌
75‌
Spectrum
Brands
Holdings 
1,524‌
109‌
184‌
Personal
Care
Products
 0.4%
BellRing
Brands (1)
7,542‌
562‌
Coty,
Class
A (1)
22,721‌
124‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
5
Shares
$
Value
(Cost
and
value
in
$000s)
‡
elf
Beauty (1)
3,136‌
197‌
883‌
Total
Consumer
Staples
8,193‌
ENERGY
 3.7%
Energy
Equipment
&
Services
 0.5%
NOV 
22,572‌
344‌
TechnipFMC 
24,825‌
787‌
Weatherford
International 
4,208‌
225‌
1,356‌
Oil,
Gas
&
Consumable
Fuels
 3.2%
Antero
Midstream 
19,750‌
356‌
Antero
Resources (1)
17,016‌
688‌
Cheniere
Energy 
13,073‌
3,025‌
Chord
Energy 
3,543‌
399‌
Civitas
Resources 
5,698‌
199‌
DT
Midstream 
5,916‌
571‌
HF
Sinclair 
9,011‌
296‌
Matador
Resources 
6,848‌
350‌
New
Fortress
Energy 
4,989‌
41‌
Ovintiv 
15,230‌
652‌
Permian
Resources 
38,386‌
532‌
Range
Resources 
13,918‌
556‌
Viper
Energy 
7,426‌
335‌
8,000‌
Total
Energy
9,356‌
FINANCIALS
 18.9%
Banks
 4.3%
Bank
OZK 
6,195‌
269‌
BOK
Financial 
1,326‌
138‌
Columbia
Banking
System 
12,152‌
303‌
Comerica 
7,760‌
458‌
Commerce
Bancshares 
7,219‌
449‌
Cullen/Frost
Bankers 
3,442‌
431‌
East
West
Bancorp 
8,091‌
726‌
First
Citizens
BancShares,
Class
A 
674‌
1,250‌
First
Hawaiian 
7,409‌
181‌
First
Horizon 
30,469‌
592‌
FNB 
20,777‌
280‌
NU
Holdings,
Class
A (1)
189,946‌
1,945‌
Pinnacle
Financial
Partners 
4,435‌
470‌
Popular 
4,063‌
375‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
6
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Prosperity
Bancshares 
5,226‌
373‌
Synovus
Financial 
8,198‌
383‌
TFS
Financial 
2,954‌
37‌
Webster
Financial 
10,012‌
516‌
Western
Alliance
Bancorp 
6,299‌
484‌
Wintrust
Financial 
3,797‌
427‌
Zions
Bancorp 
8,463‌
422‌
10,509‌
Capital
Markets
 5.9%
Affiliated
Managers
Group 
1,735‌
292‌
Ares
Management,
Class
A 
10,834‌
1,588‌
Blue
Owl
Capital 
30,756‌
616‌
Carlyle
Group 
12,850‌
560‌
Coinbase
Global,
Class
A (1)
11,860‌
2,043‌
Evercore,
Class
A 
2,069‌
413‌
Houlihan
Lokey 
3,105‌
502‌
Interactive
Brokers
Group,
Class
A 
6,185‌
1,024‌
Janus
Henderson
Group 
7,444‌
269‌
Jefferies
Financial
Group 
10,243‌
549‌
Lazard 
6,380‌
276‌
LPL
Financial
Holdings 
4,359‌
1,426‌
Morningstar 
1,566‌
470‌
Robinhood
Markets,
Class
A (1)
39,337‌
1,637‌
SEI
Investments 
5,848‌
454‌
Stifel
Financial 
5,826‌
549‌
TPG 
4,958‌
235‌
Tradeweb
Markets,
Class
A 
6,802‌
1,010‌
Virtu
Financial,
Class
A 
4,670‌
178‌
XP,
Class
A 
23,770‌
327‌
14,418‌
Consumer
Finance
 0.9%
Ally
Financial 
16,109‌
588‌
Credit
Acceptance (1)(3)
363‌
188‌
OneMain
Holdings 
6,576‌
321‌
SLM 
12,283‌
361‌
SoFi
Technologies (1)
62,630‌
728‌
2,186‌
Financial
Services
 2.8%
Affirm
Holdings (1)
15,203‌
687‌
Block (1)
32,523‌
1,767‌
Corebridge
Financial 
16,677‌
526‌
Equitable
Holdings 
18,312‌
954‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
7
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Euronet
Worldwide (1)
2,410‌
257‌
MGIC
Investment 
14,741‌
365‌
Rocket,
Class
A 
8,023‌
97‌
Shift4
Payments,
Class
A (1)
3,571‌
292‌
Toast,
Class
A (1)
27,127‌
900‌
UWM
Holdings 
5,283‌
29‌
Voya
Financial 
5,612‌
380‌
Western
Union 
19,720‌
209‌
WEX (1)
2,309‌
363‌
6,826‌
Insurance
 4.2%
American
Financial
Group 
4,210‌
553‌
Assured
Guaranty 
2,862‌
252‌
Axis
Capital
Holdings 
4,489‌
450‌
Brighthouse
Financial (1)
3,426‌
199‌
CNA
Financial 
1,275‌
65‌
Fidelity
National
Financial 
15,208‌
990‌
First
American
Financial 
5,821‌
382‌
Hanover
Insurance
Group 
2,080‌
362‌
Kemper 
3,532‌
236‌
Kinsale
Capital
Group 
1,293‌
629‌
Lincoln
National 
9,912‌
356‌
Markel
Group (1)
741‌
1,385‌
Old
Republic
International 
13,613‌
534‌
Primerica 
1,950‌
555‌
Reinsurance
Group
of
America 
3,851‌
758‌
RenaissanceRe
Holdings 
3,008‌
722‌
RLI 
4,848‌
390‌
Ryan
Specialty
Holdings 
5,988‌
442‌
Unum
Group 
10,643‌
867‌
White
Mountains
Insurance
Group 
143‌
275‌
10,402‌
Mortgage
Real
Estate
Investment
Trusts
 0.8%
AGNC
Investment,
REIT (3)
50,739‌
486‌
Annaly
Capital
Management,
REIT 
32,879‌
668‌
Rithm
Capital,
REIT 
30,211‌
346‌
Starwood
Property
Trust,
REIT 
18,547‌
366‌
1,866‌
Total
Financials
46,207‌
HEALTH
CARE
 8.7%
Biotechnology
 3.1%
Alnylam
Pharmaceuticals (1)
7,541‌
2,036‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
8
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Apellis
Pharmaceuticals (1)
6,253‌
137‌
BioMarin
Pharmaceutical (1)
11,073‌
783‌
Exact
Sciences (1)
10,704‌
463‌
Exelixis (1)
16,469‌
608‌
GRAIL (1)(3)
1,558‌
40‌
Ionis
Pharmaceuticals (1)
9,119‌
275‌
Natera (1)
6,710‌
949‌
Neurocrine
Biosciences (1)
5,850‌
647‌
Roivant
Sciences (1)(3)
24,374‌
246‌
Sarepta
Therapeutics (1)
5,357‌
342‌
Ultragenyx
Pharmaceutical (1)
5,180‌
188‌
United
Therapeutics (1)
2,560‌
789‌
Viking
Therapeutics (1)(3)
6,221‌
150‌
7,653‌
Health
Care
Equipment
&
Supplies
 1.1%
DENTSPLY
SIRONA 
11,541‌
172‌
Enovis (1)
3,294‌
126‌
Envista
Holdings (1)
10,178‌
176‌
Globus
Medical,
Class
A (1)
6,569‌
481‌
Inspire
Medical
Systems (1)
1,710‌
272‌
Masimo (1)
2,539‌
423‌
Penumbra (1)
2,163‌
578‌
QuidelOrtho (1)
3,856‌
135‌
Teleflex 
2,717‌
376‌
2,739‌
Health
Care
Providers
&
Services
 0.9%
Acadia
Healthcare (1)
5,293‌
161‌
Amedisys (1)
1,877‌
174‌
Chemed 
862‌
530‌
Encompass
Health 
5,809‌
588‌
Premier,
Class
A (3)
5,550‌
107‌
Tenet
Healthcare (1)
5,577‌
750‌
2,310‌
Health
Care
Technology
 1.0%
Certara (1)
6,967‌
69‌
Doximity,
Class
A (1)
7,352‌
427‌
Veeva
Systems,
Class
A (1)
8,634‌
2,000‌
2,496‌
Life
Sciences
Tools
&
Services
 1.5%
10X
Genomics,
Class
A (1)
6,121‌
53‌
Avantor (1)
39,797‌
645‌
Azenta (1)
2,322‌
80‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
9
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Bio-Rad
Laboratories,
Class
A (1)
1,104‌
269‌
Bruker 
6,364‌
266‌
Fortrea
Holdings (1)
5,229‌
40‌
Illumina (1)
9,343‌
741‌
Medpace
Holdings (1)
1,491‌
454‌
QIAGEN 
12,744‌
512‌
Repligen (1)
3,260‌
415‌
Sotera
Health (1)
8,755‌
102‌
3,577‌
Pharmaceuticals
 1.1%
Elanco
Animal
Health (1)
28,692‌
301‌
Intra-Cellular
Therapies (1)
6,035‌
796‌
Jazz
Pharmaceuticals (1)
3,468‌
431‌
Organon 
15,001‌
223‌
Perrigo 
7,903‌
222‌
Royalty
Pharma,
Class
A 
22,614‌
704‌
2,677‌
Total
Health
Care
21,452‌
INDUSTRIALS
&
BUSINESS
SERVICES
 16.9%
Aerospace
&
Defense
 1.8%
BWX
Technologies 
5,348‌
528‌
Curtiss-Wright 
2,238‌
710‌
HEICO 
2,586‌
691‌
HEICO,
Class
A 
4,760‌
1,004‌
Hexcel 
4,754‌
260‌
Loar
Holdings (1)
2,045‌
144‌
Spirit
AeroSystems
Holdings,
Class
A (1)
6,761‌
233‌
Standardaero (1)
6,137‌
164‌
Woodward 
3,453‌
630‌
4,364‌
Air
Freight
&
Logistics
 0.1%
GXO
Logistics (1)
6,857‌
268‌
268‌
Building
Products
 1.8%
AAON 
3,927‌
307‌
Advanced
Drainage
Systems 
4,105‌
446‌
Armstrong
World
Industries 
2,532‌
357‌
AZEK (1)
8,296‌
405‌
Carlisle 
2,645‌
901‌
Fortune
Brands
Innovations 
7,207‌
439‌
Hayward
Holdings (1)
8,288‌
115‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
10
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Owens
Corning 
5,008‌
715‌
Simpson
Manufacturing 
2,480‌
389‌
Trex (1)
6,224‌
362‌
4,436‌
Commercial
Services
&
Supplies
 1.0%
Clean
Harbors (1)
2,989‌
589‌
MSA
Safety 
2,156‌
316‌
RB
Global 
10,728‌
1,076‌
Tetra
Tech 
15,596‌
456‌
Vestis 
6,638‌
66‌
2,503‌
Construction
&
Engineering
 1.6%
AECOM 
7,763‌
720‌
API
Group (1)
13,573‌
485‌
Comfort
Systems
USA 
2,062‌
665‌
EMCOR
Group 
2,667‌
986‌
Everus
Construction
Group (1)
2,971‌
110‌
MasTec (1)
3,667‌
428‌
Valmont
Industries 
1,159‌
331‌
WillScot
Holdings 
10,432‌
290‌
4,015‌
Electrical
Equipment
 1.3%
Acuity 
1,803‌
475‌
nVent
Electric 
9,690‌
508‌
Regal
Rexnord 
3,895‌
443‌
Sensata
Technologies
Holding 
8,712‌
211‌
Vertiv
Holdings,
Class
A 
20,962‌
1,514‌
3,151‌
Ground
Transportation
 1.3%
Avis
Budget
Group (1)(3)
1,000‌
76‌
Knight-Swift
Transportation
Holdings 
9,159‌
398‌
Landstar
System 
2,049‌
308‌
Lyft,
Class
A (1)
21,670‌
257‌
Ryder
System 
2,422‌
348‌
Saia (1)
1,554‌
543‌
Schneider
National,
Class
B 
2,696‌
62‌
U-Haul
Holding (1)(3)
445‌
29‌
U-Haul
Holding,
Non-Voting 
5,843‌
346‌
XPO (1)
6,704‌
721‌
3,088‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
11
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Machinery
 3.0%
AGCO 
3,627‌
336‌
Allison
Transmission
Holdings 
5,070‌
485‌
CNH
Industrial 
51,220‌
629‌
Crane 
2,863‌
439‌
Donaldson 
7,028‌
471‌
Esab 
3,310‌
386‌
Flowserve 
7,650‌
374‌
Gates
Industrial (1)
13,824‌
254‌
Graco 
9,807‌
819‌
ITT 
4,834‌
624‌
Lincoln
Electric
Holdings 
3,238‌
612‌
Middleby (1)
3,116‌
474‌
Oshkosh 
3,800‌
357‌
RBC
Bearings (1)
1,668‌
537‌
Timken 
3,766‌
271‌
Toro 
5,904‌
429‌
7,497‌
Marine
Transportation
 0.1%
Kirby (1)
3,324‌
336‌
336‌
Passenger
Airlines
 0.3%
Alaska
Air
Group (1)
7,188‌
354‌
American
Airlines
Group (1)
38,311‌
404‌
758‌
Professional
Services
 2.7%
Amentum
Holdings (1)
8,617‌
157‌
Booz
Allen
Hamilton
Holding 
7,395‌
773‌
CACI
International,
Class
A (1)
1,296‌
476‌
Clarivate (1)
23,223‌
91‌
Concentrix 
2,695‌
150‌
Dun
&
Bradstreet
Holdings 
17,698‌
158‌
FTI
Consulting (1)
2,050‌
336‌
Genpact 
10,077‌
508‌
KBR 
7,790‌
388‌
ManpowerGroup 
2,697‌
156‌
Parsons (1)
2,660‌
157‌
Paycor
HCM (1)
4,841‌
109‌
Paylocity
Holding (1)
2,545‌
477‌
Robert
Half 
5,895‌
322‌
Science
Applications
International 
2,851‌
320‌
SS&C
Technologies
Holdings 
12,592‌
1,052‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
12
Shares
$
Value
(Cost
and
value
in
$000s)
‡
TransUnion 
11,372‌
944‌
6,574‌
Trading
Companies
&
Distributors
 1.9%
Air
Lease 
6,091‌
294‌
Core
&
Main,
Class
A (1)
11,139‌
538‌
Ferguson
Enterprises 
11,714‌
1,877‌
MSC
Industrial
Direct,
Class
A 
2,683‌
208‌
SiteOne
Landscape
Supply (1)
2,598‌
316‌
Watsco 
2,026‌
1,030‌
WESCO
International 
2,449‌
380‌
4,643‌
Total
Industrials
&
Business
Services
41,633‌
INFORMATION
TECHNOLOGY
 18.6%
Communications
Equipment
 0.3%
Ciena (1)
8,307‌
502‌
Lumentum
Holdings (1)
3,961‌
247‌
Ubiquiti 
245‌
76‌
825‌
Electronic
Equipment,
Instruments
&
Components
 1.1%
Arrow
Electronics (1)
3,057‌
317‌
Avnet 
5,002‌
241‌
Cognex 
10,017‌
299‌
Coherent (1)
7,316‌
475‌
Crane
NXT 
2,872‌
148‌
Ingram
Micro
Holding 
1,028‌
18‌
IPG
Photonics (1)
1,586‌
100‌
Littelfuse 
1,422‌
280‌
TD
SYNNEX 
4,424‌
460‌
Vontier 
8,741‌
287‌
2,625‌
IT
Services
 3.6%
Amdocs 
6,492‌
594‌
Cloudflare,
Class
A (1)
17,825‌
2,009‌
DXC
Technology (1)
10,471‌
178‌
Globant (1)
2,451‌
289‌
Kyndryl
Holdings (1)
13,306‌
418‌
MongoDB (1)
4,197‌
736‌
Okta (1)
9,484‌
998‌
Snowflake,
Class
A (1)
18,275‌
2,671‌
Twilio,
Class
A (1)
8,966‌
878‌
8,771‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
13
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Semiconductors
&
Semiconductor
Equipment
 3.0%
Allegro
MicroSystems (1)
6,811‌
171‌
Amkor
Technology 
6,710‌
121‌
Astera
Labs (1)
6,457‌
385‌
Cirrus
Logic (1)
3,101‌
309‌
Entegris 
8,829‌
772‌
GLOBALFOUNDRIES (1)
5,735‌
212‌
Lattice
Semiconductor (1)
7,971‌
418‌
MACOM
Technology
Solutions
Holdings (1)
3,631‌
364‌
Marvell
Technology 
50,151‌
3,088‌
MKS
Instruments 
3,895‌
312‌
Onto
Innovation (1)
2,866‌
348‌
Qorvo (1)
5,478‌
397‌
Universal
Display 
2,730‌
381‌
Wolfspeed (1)(3)
8,998‌
28‌
7,306‌
Software
 10.2%
Appfolio,
Class
A (1)
1,324‌
291‌
AppLovin,
Class
A (1)
15,355‌
4,069‌
Atlassian,
Class
A (1)
9,459‌
2,007‌
Bentley
Systems,
Class
B 
8,166‌
321‌
BILL
Holdings (1)
5,877‌
270‌
CCC
Intelligent
Solutions
Holdings (1)
28,086‌
254‌
Confluent,
Class
A (1)
14,424‌
338‌
Datadog,
Class
A (1)
17,791‌
1,765‌
Docusign (1)
11,747‌
956‌
Dolby
Laboratories,
Class
A 
3,505‌
281‌
DoubleVerify
Holdings (1)
8,312‌
111‌
Dropbox,
Class
A (1)
13,018‌
348‌
Dynatrace (1)
17,481‌
824‌
Elastic (1)
5,096‌
454‌
Five9 (1)
4,414‌
120‌
Gitlab,
Class
A (1)
7,354‌
346‌
Guidewire
Software (1)
4,798‌
899‌
HubSpot (1)
2,902‌
1,658‌
Informatica,
Class
A (1)
4,662‌
81‌
Manhattan
Associates (1)
3,556‌
615‌
MicroStrategy,
Class
A (1)
13,529‌
3,900‌
nCino (1)(3)
4,824‌
132‌
Nutanix,
Class
A (1)
14,662‌
1,024‌
Pegasystems 
2,608‌
181‌
Procore
Technologies (1)
6,261‌
413‌
RingCentral,
Class
A (1)
4,711‌
117‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
14
Shares
$
Value
(Cost
and
value
in
$000s)
‡
SentinelOne,
Class
A (1)
16,485‌
300‌
Teradata (1)
5,678‌
128‌
UiPath,
Class
A (1)
24,923‌
257‌
Unity
Software (1)
17,864‌
350‌
Zoom
Communications (1)
15,447‌
1,139‌
Zscaler (1)
5,457‌
1,083‌
25,032‌
Technology
Hardware,
Storage
&
Peripherals
 0.4%
Pure
Storage,
Class
A (1)
17,992‌
797‌
Sandisk (1)
6,710‌
319‌
1,116‌
Total
Information
Technology
45,675‌
MATERIALS
 5.8%
Chemicals
 1.4%
Ashland 
2,763‌
164‌
Axalta
Coating
Systems (1)
12,740‌
423‌
Celanese 
6,407‌
364‌
Chemours 
8,635‌
117‌
Element
Solutions 
13,040‌
295‌
FMC 
7,288‌
307‌
Huntsman 
9,503‌
150‌
NewMarket 
392‌
222‌
Olin 
6,703‌
162‌
RPM
International 
7,451‌
862‌
Scotts
Miracle-Gro 
2,513‌
138‌
Westlake 
1,961‌
196‌
3,400‌
Construction
Materials
 1.6%
CRH 
40,229‌
3,539‌
Eagle
Materials 
1,948‌
432‌
3,971‌
Containers
&
Packaging
 1.2%
AptarGroup 
3,875‌
575‌
Berry
Global
Group 
6,703‌
468‌
Crown
Holdings 
6,862‌
612‌
Graphic
Packaging
Holding 
17,383‌
451‌
Sealed
Air 
8,481‌
245‌
Silgan
Holdings 
4,832‌
247‌
Sonoco
Products 
5,708‌
270‌
2,868‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
15
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Metals
&
Mining
 1.5%
Alcoa 
14,442‌
440‌
ATI (1)
7,189‌
374‌
Cleveland-Cliffs (1)
28,158‌
231‌
MP
Materials (1)(3)
7,502‌
183‌
Reliance 
3,154‌
911‌
Royal
Gold 
3,853‌
630‌
Southern
Copper 
5,153‌
482‌
United
States
Steel 
13,079‌
553‌
3,804‌
Paper
&
Forest
Products
 0.1%
Louisiana-Pacific 
3,647‌
335‌
335‌
Total
Materials
14,378‌
REAL
ESTATE
 5.6%
Diversified
Real
Estate
Investment
Trusts
 0.3%
WP
Carey,
REIT 
12,704‌
802‌
802‌
Health
Care
Real
Estate
Investment
Trusts
 0.5%
Healthcare
Realty
Trust,
REIT 
20,578‌
348‌
Medical
Properties
Trust,
REIT 
34,718‌
209‌
Omega
Healthcare
Investors,
REIT 
15,829‌
603‌
1,160‌
Hotel
&
Resort
Real
Estate
Investment
Trusts
 0.0%
Park
Hotels
&
Resorts,
REIT 
11,891‌
127‌
127‌
Industrial
Real
Estate
Investment
Trusts
 1.0%
Americold
Realty
Trust,
REIT 
16,556‌
355‌
EastGroup
Properties,
REIT 
2,882‌
508‌
First
Industrial
Realty
Trust,
REIT 
7,729‌
417‌
Lineage,
REIT 
3,593‌
211‌
Rexford
Industrial
Realty,
REIT 
12,915‌
505‌
STAG
Industrial,
REIT 
10,541‌
381‌
2,377‌
Office
Real
Estate
Investment
Trusts
 0.4%
Cousins
Properties,
REIT 
9,733‌
287‌
Highwoods
Properties,
REIT 
6,105‌
181‌
Kilroy
Realty,
REIT 
6,815‌
223‌
Vornado
Realty
Trust,
REIT 
10,209‌
378‌
1,069‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
16
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Real
Estate
Management
&
Development
 0.7%
Howard
Hughes
Holdings (1)
1,841‌
136‌
Jones
Lang
LaSalle (1)
2,772‌
687‌
Seaport
Entertainment
Group (1)(3)
400‌
9‌
Zillow
Group,
Class
A (1)
2,689‌
180‌
Zillow
Group,
Class
C (1)
9,102‌
624‌
1,636‌
Residential
Real
Estate
Investment
Trusts
 1.0%
American
Homes
4
Rent,
Class
A,
REIT 
19,801‌
749‌
Equity
LifeStyle
Properties,
REIT 
11,071‌
738‌
Sun
Communities,
REIT 
7,387‌
950‌
2,437‌
Retail
Real
Estate
Investment
Trusts
 0.6%
Agree
Realty,
REIT 
5,987‌
462‌
Brixmor
Property
Group,
REIT 
17,538‌
465‌
NNN
REIT,
REIT 
10,918‌
466‌
1,393‌
Specialized
Real
Estate
Investment
Trusts
 1.1%
CubeSmart,
REIT 
13,136‌
561‌
EPR
Properties,
REIT 
4,358‌
229‌
Gaming
&
Leisure
Properties,
REIT 
15,273‌
777‌
Lamar
Advertising,
Class
A,
REIT 
5,111‌
582‌
Millrose
Properties,
REIT (1)
7,288‌
193‌
National
Storage
Affiliates
Trust,
REIT 
4,090‌
161‌
Rayonier,
REIT 
8,987‌
251‌
2,754‌
Total
Real
Estate
13,755‌
UTILITIES
 1.2%
Electric
Utilities
 0.4%
IDACORP 
3,096‌
360‌
OGE
Energy 
11,725‌
539‌
899‌
Gas
Utilities
 0.4%
MDU
Resources 
11,847‌
200‌
National
Fuel
Gas 
5,263‌
417‌
UGI 
12,581‌
416‌
1,033‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
17
Shares
$
Value
(Cost
and
value
in
$000s)
‡
Independent
Power
&
Renewable
Electricity
Producers
 0.2%
Brookfield
Renewable 
7,994‌
223‌
Clearway
Energy,
Class
A 
2,107‌
60‌
Clearway
Energy,
Class
C 
4,766‌
144‌
427‌
Water
Utilities
 0.2%
Essential
Utilities 
14,781‌
584‌
584‌
Total
Utilities
2,943‌
Total
Common
Stocks
(Cost
$232,871)
244,571‌
EQUITY
MUTUAL
FUNDS
 0.2%
SPDR
S&P
MidCap
400
ETF
Trust (3)
1,055‌
563‌
Total
Equity
Mutual
Funds
(Cost
$593)
563‌
SHORT-TERM
INVESTMENTS
 0.0%
Money
Market
Funds
 0.0%
T.
Rowe
Price
Government
Reserve
Fund,
4.39% (4)(5)
1,499‌
1‌
Total
Short-Term
Investments
(Cost
$1)
1‌
SECURITIES
LENDING
COLLATERAL
 1.3%
INVESTMENTS
IN
A
POOLED
ACCOUNT
THROUGH
SECURITIES
LENDING
PROGRAM
WITH
STATE
STREET
BANK
AND
TRUST
COMPANY 1.3%
Money
Market
Funds 1.3%
T.
Rowe
Price
Government
Reserve
Fund,
4.39% (4)(5)
3,175,972‌
3,176‌
Total
Investments
in
a
Pooled
Account
through
Securities
Lending
Program
with
State
Street
Bank
and
Trust
Company
3,176‌
Total
Securities
Lending
Collateral
(Cost
$3,176)
3,176‌
Total
Investments
in
Securities
 101.1%
(Cost
$236,641)
$
248,311‌
Other
Assets
Less
Liabilities
(1.1)%
(2,602‌)
Net
Assets
100.0%
$
245,709‌
T.
ROWE
PRICE
Mid-Cap
Index
Fund
18
‡
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
March
31,
2025.
(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.
ETF
Exchange-Traded
Fund
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
19
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,
2025.
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,
4.39%
$
—‌
$
—‌
$
5‌++
Totals
$
—‌#
$
—‌
$
5‌+
Supplementary
Investment
Schedule
Affiliate
Value
12/31/24
Purchase
Cost
Sales
Cost
Value
3/31/25
T.
Rowe
Price
Government
Reserve
Fund,
4.39%
$
4,514‌
 ¤
 ¤
$
3,177‌
Total
$
3,177‌^
#
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
$5
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
$3,177.
T.
ROWE
PRICE
Mid-Cap
Index
Fund
Unaudited
Notes
to
Portfolio
of
Investments
20
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.
Eastern
time,
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)
T.
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Mid-Cap
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21
Level
3
–
unobservable
inputs
(including
the Valuation
Designee’s assumptions
in
determining
fair
value)
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;
T.
ROWE
PRICE
Mid-Cap
Index
Fund
22
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
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,
2025
(for
further
detail
by
category,
please
refer
to
the
accompanying
Portfolio
of
Investments):
OTHER
MATTERS 
Unpredictable environmental,
political,
social
and
economic
events,
including
but
not
limited
to,
environmental
or
natural
disasters,
war
and
conflict
(including
Russia’s
military
invasion
of
Ukraine
and
the
conflict
in
Israel,
Gaza
and
surrounding
areas),
terrorism,
geopolitical
developments
(including
trading
and
tariff
arrangements,
sanctions
and
cybersecurity
attacks),
and
public
health
epidemics
(including
the
global
outbreak
of
COVID-19)
and
similar
public
health
threats,
may
significantly
affect
the
economy
and
the
markets
and
issuers
in
which
a
fund
invests.
The
extent
and
duration
of
such
events
and
resulting
market
disruptions
cannot
be
predicted.
These
and
other
similar
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.
The
fund’s
($000s)
Level
1
Level
2
Level
3
Total
Value
Assets
Common
Stocks
$
244,571‌
$
—‌
$
—‌
$
244,571‌
Equity
Mutual
Funds
563‌
—‌
—‌
563‌
Short-Term
Investments
1‌
—‌
—‌
1‌
Securities
Lending
Collateral
3,176‌
—‌
—‌
3,176‌
Total
$
248,311‌
$
—‌
$
—‌
$
248,311‌
T.
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PRICE
Mid-Cap
Index
Fund
23
performance
could
be
negatively
impacted
if
the
value
of
a
portfolio
holding
were
harmed
by
these
or
such
events.
Management
actively
monitors
the
risks
and
financial
impacts
arising
from
such
events.