Penn Series Funds, Inc.
Schedule of Investments — March 31, 2024 (Unaudited)
SMID Cap Growth Fund
  Number of
Shares
Value†
COMMON STOCKS — 98.3%
Aerospace & Defense — 1.4%
HEICO Corp. 5,826 $1,112,766
Apparel — 4.9%
Birkenstock Holding PLC* 8,598 406,256
Crocs, Inc.* 6,834 982,729
Deckers Outdoor Corp.* 2,022 1,903,228
On Holding AG, Class A* 15,688 555,041
    3,847,254
Beverages — 1.4%
Celsius Holdings, Inc.* 13,045 1,081,691
Biotechnology — 4.9%
Apellis Pharmaceuticals, Inc.* 5,790 340,336
BioMarin Pharmaceutical, Inc.* 5,335 465,959
Blueprint Medicines Corp.* 5,161 489,572
Crinetics Pharmaceuticals, Inc.* 4,386 205,309
Exelixis, Inc.* 14,318 339,766
Intra-Cellular Therapies, Inc.* 5,261 364,061
Krystal Biotech, Inc.* 2,050 364,757
Roivant Sciences Ltd.* 40,409 425,911
Sarepta Therapeutics, Inc.* 3,748 485,216
Ultragenyx Pharmaceutical, Inc.* 7,748 361,754
    3,842,641
Building Materials — 1.8%
AAON, Inc. 15,567 1,371,453
Chemicals — 3.0%
Ashland, Inc. 13,351 1,299,987
RPM International, Inc. 8,633 1,026,895
    2,326,882
Commercial Services — 0.8%
WEX, Inc.* 2,661 632,067
Computers — 3.7%
CyberArk Software Ltd.* 3,510 932,361
Parsons Corp.* 4,533 376,013
Pure Storage, Inc., Class A* 23,004 1,195,978
Super Micro Computer, Inc.* 403 407,042
    2,911,394
Cosmetics & Personal Care — 1.8%
elf Beauty, Inc.* 7,219 1,415,140
Distribution & Wholesale — 4.8%
Core & Main, Inc., Class A* 21,954 1,256,867
Pool Corp. 2,166 873,981
SiteOne Landscape Supply, Inc.* 3,817 666,257
Watsco, Inc. 2,221 959,405
    3,756,510
Diversified Financial Services — 2.0%
Hamilton Lane, Inc., Class A 4,242 478,328
Houlihan Lokey, Inc. 4,253 545,192
LPL Financial Holdings, Inc. 1,978 522,588
    1,546,108
  Number of
Shares
Value†
 
Electrical Components & Equipment — 1.6%
Novanta, Inc.* 7,258 $1,268,481
Electronics — 5.9%
Allegion PLC 8,728 1,175,749
Badger Meter, Inc. 3,996 646,593
Hubbell, Inc. 3,270 1,357,213
Mettler-Toledo International, Inc.* 416 553,817
nVent Electric PLC 11,393 859,032
    4,592,404
Engineering & Construction — 2.3%
EMCOR Group, Inc. 3,354 1,174,571
TopBuild Corp.* 1,374 605,563
    1,780,134
Environmental Control — 1.4%
Tetra Tech, Inc. 6,069 1,121,005
Hand & Machine Tools — 1.7%
Lincoln Electric Holdings, Inc. 5,200 1,328,288
Healthcare Products — 11.3%
Bio-Techne Corp. 12,870 905,920
Bruker Corp. 14,247 1,338,363
Exact Sciences Corp.* 11,575 799,369
Inspire Medical Systems, Inc.* 3,068 658,976
Natera, Inc.* 13,343 1,220,351
Repligen Corp.* 4,838 889,805
Shockwave Medical, Inc.* 3,843 1,251,396
Stevanato Group SpA 19,471 625,019
The Cooper Cos., Inc. 11,454 1,162,123
    8,851,322
Healthcare Services — 1.5%
Medpace Holdings, Inc.* 1,346 543,986
Surgery Partners, Inc.* 19,927 594,422
    1,138,408
Household Products & Wares — 1.0%
Avery Dennison Corp. 3,460 772,445
Insurance — 1.9%
Kinsale Capital Group, Inc. 2,898 1,520,696
Machinery — Diversified — 4.4%
Esab Corp. 2,543 281,179
IDEX Corp. 4,041 986,085
Nordson Corp. 3,576 981,755
Watts Water Technologies, Inc., Class A 5,432 1,154,572
    3,403,591
Media — 0.9%
Liberty Media Corp.-Liberty Formula One, Class C* 10,217 670,235
Metal Fabricate/Hardware — 0.8%
RBC Bearings, Inc.* 2,259 610,721
 
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Penn Series Funds, Inc.
Schedule of Investments — March 31, 2024 (Unaudited)
SMID Cap Growth Fund
  Number of
Shares
Value†
COMMON STOCKS — (continued)
Oil & Gas — 1.8%
Antero Resources Corp.* 5,766 $167,214
Chesapeake Energy Corp. 2,033 180,591
Noble Corp. PLC 11,257 545,852
Permian Resources Corp. 19,174 338,613
Weatherford International PLC* 1,734 200,138
    1,432,408
Oil & Gas Services — 0.2%
ChampionX Corp. 4,739 170,083
Packaging and Containers — 1.1%
Ball Corp. 12,373 833,446
Pharmaceuticals — 2.1%
BellRing Brands, Inc.* 7,683 453,528
Neurocrine Biosciences, Inc.* 5,673 782,420
Vaxcyte, Inc.* 5,995 409,518
    1,645,466
Retail — 9.8%
BJ's Wholesale Club Holdings, Inc.* 14,760 1,116,594
Casey's General Stores, Inc. 2,321 739,122
Domino's Pizza, Inc. 2,536 1,260,088
Five Below, Inc.* 5,306 962,402
Floor & Decor Holdings, Inc., Class A* 8,733 1,131,972
Texas Roadhouse, Inc. 8,252 1,274,686
Wingstop, Inc. 3,304 1,210,586
    7,695,450
Semiconductors — 5.4%
Allegro MicroSystems, Inc.* 21,881 589,912
Astera Labs, Inc.* 3,430 254,472
Lattice Semiconductor Corp.* 12,960 1,013,861
MACOM Technology Solutions Holdings, Inc.* 12,242 1,170,825
MKS Instruments, Inc. 6,056 805,448
Rambus, Inc.* 6,055 374,259
    4,208,777
Software — 12.7%
DoubleVerify Holdings, Inc.* 19,078 670,783
Dynatrace, Inc.* 22,338 1,037,377
Elastic N.V.* 8,157 817,658
Evolent Health, Inc., Class A* 15,451 506,638
Guidewire Software, Inc.* 5,778 674,350
Klaviyo, Inc., Class A* 22,917 583,925
Manhattan Associates, Inc.* 5,108 1,278,175
Monday.com Ltd.* 3,570 806,356
Nutanix, Inc., Class A* 10,931 674,661
Procore Technologies, Inc.* 11,358 933,287
Samsara, Inc., Class A* 22,075 834,214
SentinelOne, Inc., Class A* 19,499 454,522
UiPath, Inc., Class A* 29,415 666,838
    9,938,784
TOTAL COMMON STOCKS
(Cost $58,695,985)
76,826,050
    
  Number ofShares Value†
SHORT-TERM INVESTMENTS — 1.3%
BlackRock Liquidity FedFund - Institutional Shares (seven-day effective yield 5.197%)
(Cost $997,035)
997,035 $997,035
TOTAL INVESTMENTS — 99.6%
(Cost $59,693,020)
  $77,823,085
Other Assets & Liabilities — 0.4% 334,413
TOTAL NET ASSETS — 100.0%   $78,157,498

See Security Valuation Note in the most recent semi-annual or annual report.
* Non-income producing security.
AG— Aktiengesellschaft.
N.V.— Naamloze Vennootschap.
PLC— Public Limited Company.
SpA— Società per Azioni.
Country Weightings as of 3/31/2024††
United States 93%
Israel 2
United Kingdom 2
Ireland 1
Italy 1
Switzerland 1
Total 100%
†† % of total investments as of March 31, 2024.
 
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