California State Teachers Retirement System (CalSTRS)
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California State Teachers Retirement System (CalSTRS)’s Patterson-UTI PTEN Stock Holding History

California State Teachers Retirement System (CalSTRS)’s Portfolio PTEN Stock Details PTEN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$4.61M Buy
425,281
+72,082
+20% +$617K ﹤0.01% 1067
2025
Q4 		$2.16M Buy
353,199
+8,502
+2% +$50.8K ﹤0.01% 1376
2025
Q3 		$1.79M Buy
344,697
+16
+0% +$92 ﹤0.01% 1458
2025
Q2 		$2.04M Hold
344,681
– – ﹤0.01% 1355
2025
Q1 		$2.83M Sell
344,681
-5,891
-2% -$49.4K ﹤0.01% 1153
2024
Q4 		$2.9M Sell
350,572
-10,970
-3% -$88K ﹤0.01% 1180
2024
Q3 		$2.77M Buy
361,542
+821
+0.2% +$7.56K ﹤0.01% 1232
2024
Q2 		$3.74M Sell
360,721
-12,556
-3% -$138K ﹤0.01% 1014
2024
Q1 		$4.46M Sell
373,277
-2,069
-0.6% -$23K 0.01% 969
2023
Q4 		$4.05M Sell
375,346
-14,494
-4% -$176K 0.01% 1026
2023
Q3 		$5.4M Buy
389,840
+137,587
+55% +$2.01M 0.01% 835
2023
Q2 		$3.02M Sell
252,253
-18,049
-7% -$204K ﹤0.01% 1258
2023
Q1 		$3.16M Sell
270,302
-4,001
-1% -$58.4K ﹤0.01% 1212
2022
Q4 		$4.62M Buy
274,303
+3,456
+1% +$57K 0.01% 989
2022
Q3 		$3.16M Sell
270,847
-4,748
-2% -$67.8K 0.01% 1171
2022
Q2 		$4.34M Buy
275,595
+12,867
+5% +$216K 0.01% 1034
2022
Q1 		$4.07M Sell
262,728
-2,971
-1% -$37.5K 0.01% 1183
2021
Q4 		$2.25M Buy
265,699
+5,436
+2% +$46.8K ﹤0.01% 1670
2021
Q3 		$2.34M Sell
260,263
-1,918
-0.7% -$15.5K ﹤0.01% 1642
2021
Q2 		$2.61M Sell
262,181
-19,768
-7% -$167K ﹤0.01% 1625
2021
Q1 		$2.01M Buy
281,949
+77
+0% +$543 ﹤0.01% 1736
2020
Q4 		$1.48M Sell
281,872
-26,033
-8% -$102K ﹤0.01% 1798
2020
Q3 		$878K Buy
307,905
+5,536
+2% +$20.4K ﹤0.01% 1935
2020
Q2 		$1.05M Sell
302,369
-33,243
-10% -$115K ﹤0.01% 1833
2020
Q1 		$789K Buy
335,612
+23,826
+8% +$154K ﹤0.01% 1812
2019
Q4 		$3.27M Sell
311,786
-19,971
-6% -$181K 0.01% 1272
2019
Q3 		$2.84M Sell
331,757
-6,453
-2% -$63.3K 0.01% 1317
2019
Q2 		$3.89M Sell
338,210
-11,602
-3% -$149K 0.01% 1149
2019
Q1 		$4.9M Sell
349,812
-10,840
-3% -$142K 0.01% 981
2018
Q4 		$3.73M Sell
360,652
-5,504
-2% -$81.1K 0.01% 1081
2018
Q3 		$6.26M Buy
366,156
+69
+0% +$1.19K 0.01% 890
2018
Q2 		$6.59M Buy
366,087
+17,151
+5% +$344K 0.01% 849
2018
Q1 		$6.11M Sell
348,936
-10,135
-3% -$212K 0.01% 852
2017
Q4 		$8.26M Buy
359,071
+2,977
+0.8% +$61.7K 0.02% 746
2017
Q3 		$7.46M Sell
356,094
-27,819
-7% -$512K 0.02% 772
2017
Q2 		$7.75M Buy
383,913
+50,038
+15% +$1.09M 0.02% 773
2017
Q1 		$8.1M Buy
333,875
+25,100
+8% +$677K 0.02% 779
2016
Q4 		$8.31M Sell
308,775
-8,200
-3% -$203K 0.02% 780
2016
Q3 		$7.09M Buy
316,975
+2,900
+0.9% +$58.2K 0.01% 841
2016
Q2 		$6.7M Sell
314,075
-6,571
-2% -$124K 0.01% 848
2016
Q1 		$5.65M Buy
320,646
+39,891
+14% +$595K 0.01% 951
2015
Q4 		$4.23M Buy
280,755
+4,464
+2% +$68.7K 0.01% 1051
2015
Q3 		$3.63M Buy
276,291
+8,156
+3% +$129K 0.01% 1143
2015
Q2 		$5.04M Sell
268,135
-601
-0.2% -$12.5K 0.01% 1025
2015
Q1 		$5.05M Sell
268,736
-3,959
-1% -$67.9K 0.01% 1019
2014
Q4 		$4.52M Buy
272,695
+1,859
+0.7% +$39.2K 0.01% 1070
2014
Q3 		$8.81M Buy
270,836
+7,011
+3% +$238K 0.02% 686
2014
Q2 		$9.22M Sell
263,825
-3,400
-1% -$112K 0.02% 678
2014
Q1 		$8.47M Buy
267,225
+1,300
+0.5% +$36.2K 0.02% 685
2013
Q4 		$6.73M Buy
265,925
+1,900
+0.7% +$45.5K 0.02% 791
2013
Q3 		$5.64M Buy
264,025
+8,058
+3% +$165K 0.02% 841
2013
Q2 		$4.95M Buy
+255,967
New +$5.59M 0.02% 837

Other funds holding PTEN

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
SG
Sourcerock Group Denver, Colorado $2.48B AUM 72.25% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $29.7B AUM 43.33% 1-Year Est. Return

California State Teachers Retirement System (CalSTRS)'s PTEN Position: Q1 2026 in Review

California State Teachers Retirement System (CalSTRS) increased its Patterson-UTI (PTEN) stake by 20% in Q1 2026, buying an estimated $617K and bringing the position to 425,281 shares worth $4.61M. The position accounts for ﹤0.01% of the portfolio, ranked #1067.

California State Teachers Retirement System (CalSTRS) first reported a position in PTEN in Q2 2013 and has held it in 52 quarters since. The position peaked at $9.22M in Q2 2014. 410 funds tracked by Wall St. Rank hold PTEN as of Q1 2026.

  • California State Teachers Retirement System (CalSTRS) held 425,281 shares of Patterson-UTI worth $4.61M as of Q1 2026.
  • California State Teachers Retirement System (CalSTRS) bought 72,082 Patterson-UTI shares in Q1 2026, an estimated $617K.
  • Patterson-UTI made up ﹤0.01% of California State Teachers Retirement System (CalSTRS)'s portfolio in Q1 2026, its #1067 holding.
  • California State Teachers Retirement System (CalSTRS) first reported a position in Patterson-UTI in Q2 2013 and has held it in 52 quarters since.
  • California State Teachers Retirement System (CalSTRS)'s Patterson-UTI position peaked at $9.22M in Q2 2014.
  • 410 funds tracked by Wall St. Rank held Patterson-UTI as of Q1 2026.

Based on California State Teachers Retirement System (CalSTRS)'s 13F filing for Q1 2026, filed 18 May 2026.