CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM

Pension

CIK

1081019

City

WEST SACRAMENTO

State / Country

Stock

PTEN — Patterson Uti Energy Inc

Top Portfolio Positions

2,890 positions · $90,327,389,326 total · as of Mar 31, 2026

Ticker	Company	Shares	Value (USD)	% of Portfolio
NVDA	Nvidia Corp Technology	36,688,762	$6,398,520,092	7.08%
AAPL	Apple Inc. Technology	22,272,610	$5,652,565,691	6.26%
MSFT	Microsoft Corp Technology	10,715,663	$3,966,616,972	4.39%
AMZN	Amazon Com Inc Consumer Cyclical	14,562,158	$3,032,860,646	3.36%
GOOGL	Alphabet Inc. Communication Services	8,867,713	$2,549,999,550	2.82%
AVGO	Broadcom Inc. Technology	6,816,811	$2,109,871,172	2.34%
META	Meta Platforms, Inc. Communication Services	3,291,945	$1,883,420,492	2.09%
TSLA	Tesla, Inc. Consumer Cyclical	4,278,032	$1,590,358,396	1.76%
JPM	Jpmorgan Chase & Co Financial Services	4,132,836	$1,215,715,037	1.35%
LLY	ELI LILLY & Co Healthcare	1,214,622	$1,117,172,876	1.24%

25 quarters · across all stocks

25 quarters on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$4,605,793	425,281	+20.4%	Shares	Sole	2026-05-18
2025-12-31	$2,158,045	353,199	+2.5%	Shares	Sole	2026-02-17
2025-09-30	$1,785,530	344,697	+0.0%	Shares	Sole	2025-11-14
2025-06-30	$2,043,958	344,681	0.0%	Shares	Sole	2025-08-14
2025-03-31	$2,833,277	344,681	-1.7%	Shares	Sole	2025-05-15
2024-12-31	$2,895,724	350,572	-3.0%	Shares	Sole	2025-03-18
2024-09-30	$2,765,796	361,542	+0.2%	Shares	Sole	2025-04-04
2024-06-30	$3,737,069	360,721	-3.4%	Shares	Sole	2025-04-08
2024-03-31	$4,456,927	373,277	-0.6%	Shares	Sole	2024-05-16
2023-12-31	$4,053,736	375,346	-3.7%	Shares	Sole	2024-02-13
2023-09-30	$5,395,385	389,840	+54.5%	Shares	Sole	2023-11-14
2023-06-30	$3,019,468	252,253	-6.7%	Shares	Sole	2023-08-21
2023-03-31	$3,162,533	270,302	-1.5%	Shares	Sole	2023-05-09
2022-12-31	$4,619,262	274,303	+1.3%	Shares	Sole	2023-02-14
2022-09-30	$3,163,492	270,847	-1.7%	Shares	Sole	2022-11-21
2022-06-30	$4,343,377	275,595	+4.9%	Shares	Sole	2022-08-15
2022-03-31	$4,067,029	262,728	-1.1%	Shares	Sole	2022-05-16
2021-12-31	$2,245,156	265,699	+2.1%	Shares	Sole	2022-02-15
2021-09-30	$2,342,367	260,263	-0.7%	Shares	Sole	2021-11-15
2021-06-30	$2,606,079	262,181	-7.0%	Shares	Sole	2021-08-16
2021-03-31	$2,010,296	281,949	+0.0%	Shares	Sole	2021-05-18
2020-12-31	$1,482,646	281,872	-8.5%	Shares	Sole	2021-02-16
2020-09-30	$877,529	307,905	+1.8%	Shares	Sole	2020-11-17
2020-06-30	$1,049,220	302,369	-9.9%	Shares	Sole	2020-08-17
2020-03-31	$788,688	335,612	—	Shares	Sole	2020-05-13
No 13F history on record for this holder in this stock.