OSI SYSTEMS INC

Ticker: OSIS CUSIP: 671044105 Class: EQTY

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0001081019)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 15,007 Value ($000) $3,828 Avg Close $261.19 Range $231.66 - $292.34

Q3 2025

Shares 15,010 Value ($000) $3,741 Avg Close $228.27 Range $204.00 - $249.79

Q2 2025

Shares 15,795 Value ($000) $3,552 Avg Close $213.44 Range $164.08 - $241.64

Q1 2025

Shares 15,718 Value ($000) $3,055 Avg Close $190.49 Range $150.84 - $220.00

Q4 2024

Shares 14,727 Value ($000) $2,466 Avg Close $158.52 Range $129.84 - $189.13

Q3 2024

Shares 15,321 Value ($000) $2,326 Avg Close $143.78 Range $129.18 - $158.69

Q2 2024

Shares 15,811 Value ($000) $2,174 Avg Close $137.83 Range $126.57 - $145.25

Q1 2024

Shares 16,134 Value ($000) $2,304 Avg Close $131.26 Range $120.42 - $144.03

Q4 2023

Shares 16,867 Value ($000) $2,177 Avg Close $119.08 Range $103.04 - $132.60

Q3 2023

Shares 17,548 Value ($000) $2,071 Avg Close $120.57 Range $112.19 - $139.90

Q2 2023

Shares 19,366 Value ($000) $2,282 Avg Close $114.74 Range $99.11 - $127.07

Q1 2023

Shares 20,025 Value ($000) $2,050 Avg Close $92.62 Range $78.35 - $102.89

Q4 2022

Shares 20,375 Value ($000) $1,620 Avg Close $81.40 Range $69.31 - $90.71

Q3 2022

Shares 20,330 Value ($000) $1,465 Avg Close $87.60 Range $72.02 - $103.17

Q2 2022

Shares 21,367 Value ($000) $1,826 Avg Close $82.06 Range $76.09 - $87.38

Q1 2022

Shares 21,721 Value ($000) $1,849 Avg Close $84.05 Range $76.35 - $95.63

Q4 2021

Shares 23,618 Value ($000) $2,201 Avg Close $93.81 Range $87.97 - $98.88

Q3 2021

Shares 23,099 Value ($000) $2,190 Avg Close $97.38 Range $91.08 - $101.64

Q2 2021

Shares 23,391 Value ($000) $2,377 Avg Close $97.33 Range $91.95 - $102.24

Q1 2021

Shares 25,530 Value ($000) $2,453 Avg Close $94.91 Range $89.10 - $100.67

Q4 2020

Shares 25,530 Value ($000) $2,380 Avg Close $85.48 Range $76.31 - $94.87

Q3 2020

Shares 25,658 Value ($000) $1,991 Avg Close $74.61 Range $66.11 - $81.69

Q2 2020

Shares 25,658 Value ($000) $1,915 Avg Close $73.05 Range $63.09 - $85.01

Q1 2020

Shares 25,658 Value ($000) $1,768 Avg Close $85.46 Range $49.96 - $102.61

Q4 2019

Shares 25,785 Value ($000) $2,598 Avg Close $98.82 Range $93.98 - $102.81

Q3 2019

Shares 25,944 Value ($000) $2,635 Avg Close $108.01 Range $93.05 - $117.21

Q2 2019

Shares 25,635 Value ($000) $2,887 Avg Close $100.77 Range $85.22 - $114.42

Q1 2019

Shares 25,753 Value ($000) $2,256 Avg Close $83.70 Range $70.22 - $91.19

Q4 2018

Shares 26,304 Value ($000) $1,928 Avg Close $72.14 Range $67.15 - $76.91

Q3 2018

Shares 25,711 Value ($000) $1,962 Avg Close $77.62 Range $73.70 - $82.94

Q2 2018

Shares 25,720 Value ($000) $1,989 Avg Close $69.82 Range $61.72 - $80.19

Q1 2018

Shares 26,920 Value ($000) $1,757 Avg Close $64.89 Range $50.50 - $73.28

Q4 2017

Shares 27,863 Value ($000) $1,794 Avg Close $84.03 Range $53.80 - $96.64

Q3 2017

Shares 27,860 Value ($000) $2,546 Avg Close $81.30 Range $74.96 - $92.34

Q2 2017

Shares 30,859 Value ($000) $2,319 Avg Close $75.70 Range $69.08 - $82.26

Q1 2017

Shares 34,526 Value ($000) $2,520 Avg Close $74.27 Range $69.45 - $81.55

Q4 2016

Shares 36,126 Value ($000) $2,750 Avg Close $72.10 Range $65.00 - $78.86

Q3 2016

Shares 37,126 Value ($000) $2,427 Avg Close $63.03 Range $55.76 - $69.49

Q2 2016

Shares 36,726 Value ($000) $2,135 Avg Close $55.08 Range $48.76 - $66.43

Q1 2016

Shares 42,125 Value ($000) $2,759 Avg Close $66.19 Range $48.19 - $88.33

Q4 2015

Shares 36,710 Value ($000) $3,255 Avg Close $87.50 Range $75.60 - $96.75

Q3 2015

Shares 36,080 Value ($000) $2,777 Avg Close $72.21 Range $66.94 - $79.28

Q2 2015

Shares 36,180 Value ($000) $2,561 Avg Close $72.33 Range $66.03 - $76.70

Q1 2015

Shares 36,571 Value ($000) $2,716 Avg Close $71.68 Range $66.90 - $75.00

Q4 2014

Shares 37,171 Value ($000) $2,631 Avg Close $68.20 Range $58.54 - $74.79

Q3 2014

Shares 36,814 Value ($000) $2,337 Avg Close $66.39 Range $62.10 - $70.27

Q2 2014

Shares 36,405 Value ($000) $2,430 Avg Close $59.67 Range $52.68 - $67.44

Q1 2014

Shares 36,305 Value ($000) $2,173 Avg Close $59.85 Range $51.85 - $66.78

Q4 2013

Shares 36,105 Value ($000) $1,918 Avg Close $68.42 Range $39.00 - $78.50

Q3 2013

Shares 35,805 Value ($000) $2,666 Avg Close $71.00 Range $63.20 - $76.25

Q2 2013

Shares 34,742 Value ($000) $2,238 Avg Close $58.30 Range $48.10 - $67.50

Q1 2013

Shares 34,555 Value ($000) $2,152 Avg Close $61.66 Range $53.14 - $72.02

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	15,007	$3,828	$261.19	$231.66 - $292.34
Q3 2025	15,010	$3,741	$228.27	$204.00 - $249.79
Q2 2025	15,795	$3,552	$213.44	$164.08 - $241.64
Q1 2025	15,718	$3,055	$190.49	$150.84 - $220.00
Q4 2024	14,727	$2,466	$158.52	$129.84 - $189.13
Q3 2024	15,321	$2,326	$143.78	$129.18 - $158.69
Q2 2024	15,811	$2,174	$137.83	$126.57 - $145.25
Q1 2024	16,134	$2,304	$131.26	$120.42 - $144.03
Q4 2023	16,867	$2,177	$119.08	$103.04 - $132.60
Q3 2023	17,548	$2,071	$120.57	$112.19 - $139.90
Q2 2023	19,366	$2,282	$114.74	$99.11 - $127.07
Q1 2023	20,025	$2,050	$92.62	$78.35 - $102.89
Q4 2022	20,375	$1,620	$81.40	$69.31 - $90.71
Q3 2022	20,330	$1,465	$87.60	$72.02 - $103.17
Q2 2022	21,367	$1,826	$82.06	$76.09 - $87.38
Q1 2022	21,721	$1,849	$84.05	$76.35 - $95.63
Q4 2021	23,618	$2,201	$93.81	$87.97 - $98.88
Q3 2021	23,099	$2,190	$97.38	$91.08 - $101.64
Q2 2021	23,391	$2,377	$97.33	$91.95 - $102.24
Q1 2021	25,530	$2,453	$94.91	$89.10 - $100.67
Q4 2020	25,530	$2,380	$85.48	$76.31 - $94.87
Q3 2020	25,658	$1,991	$74.61	$66.11 - $81.69
Q2 2020	25,658	$1,915	$73.05	$63.09 - $85.01
Q1 2020	25,658	$1,768	$85.46	$49.96 - $102.61
Q4 2019	25,785	$2,598	$98.82	$93.98 - $102.81
Q3 2019	25,944	$2,635	$108.01	$93.05 - $117.21
Q2 2019	25,635	$2,887	$100.77	$85.22 - $114.42
Q1 2019	25,753	$2,256	$83.70	$70.22 - $91.19
Q4 2018	26,304	$1,928	$72.14	$67.15 - $76.91
Q3 2018	25,711	$1,962	$77.62	$73.70 - $82.94
Q2 2018	25,720	$1,989	$69.82	$61.72 - $80.19
Q1 2018	26,920	$1,757	$64.89	$50.50 - $73.28
Q4 2017	27,863	$1,794	$84.03	$53.80 - $96.64
Q3 2017	27,860	$2,546	$81.30	$74.96 - $92.34
Q2 2017	30,859	$2,319	$75.70	$69.08 - $82.26
Q1 2017	34,526	$2,520	$74.27	$69.45 - $81.55
Q4 2016	36,126	$2,750	$72.10	$65.00 - $78.86
Q3 2016	37,126	$2,427	$63.03	$55.76 - $69.49
Q2 2016	36,726	$2,135	$55.08	$48.76 - $66.43
Q1 2016	42,125	$2,759	$66.19	$48.19 - $88.33
Q4 2015	36,710	$3,255	$87.50	$75.60 - $96.75
Q3 2015	36,080	$2,777	$72.21	$66.94 - $79.28
Q2 2015	36,180	$2,561	$72.33	$66.03 - $76.70
Q1 2015	36,571	$2,716	$71.68	$66.90 - $75.00
Q4 2014	37,171	$2,631	$68.20	$58.54 - $74.79
Q3 2014	36,814	$2,337	$66.39	$62.10 - $70.27
Q2 2014	36,405	$2,430	$59.67	$52.68 - $67.44
Q1 2014	36,305	$2,173	$59.85	$51.85 - $66.78
Q4 2013	36,105	$1,918	$68.42	$39.00 - $78.50
Q3 2013	35,805	$2,666	$71.00	$63.20 - $76.25
Q2 2013	34,742	$2,238	$58.30	$48.10 - $67.50
Q1 2013	34,555	$2,152	$61.66	$53.14 - $72.02