OSI SYSTEMS INC

Ticker: OSIS CUSIP: 671044105 Class: EQTY

PRIMECAP MANAGEMENT CO/CA/'s Holding History (CIK: 0000763212)

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

Q4 2025

Shares 267,710 Value ($000) $68,282 Avg Close $261.19 Range $231.66 - $292.34

Q3 2025

Shares 306,630 Value ($000) $76,424 Avg Close $228.27 Range $204.00 - $249.79

Q2 2025

Shares 321,420 Value ($000) $72,275 Avg Close $213.44 Range $164.08 - $241.64

Q1 2025

Shares 334,330 Value ($000) $64,974 Avg Close $190.49 Range $150.84 - $220.00

Q4 2024

Shares 297,710 Value ($000) $49,846 Avg Close $158.52 Range $129.84 - $189.13

Q3 2024

Shares 294,500 Value ($000) $44,714 Avg Close $143.78 Range $129.18 - $158.69

Q2 2024

Shares 280,620 Value ($000) $38,591 Avg Close $137.83 Range $126.57 - $145.25

Q1 2024

Shares 293,100 Value ($000) $41,861 Avg Close $131.26 Range $120.42 - $144.03

Q4 2023

Shares 285,200 Value ($000) $36,805 Avg Close $119.08 Range $103.04 - $132.60

Q3 2023

Shares 278,990 Value ($000) $32,932 Avg Close $120.57 Range $112.19 - $139.90

Q2 2023

Shares 290,350 Value ($000) $34,212 Avg Close $114.74 Range $99.11 - $127.07

Q1 2023

Shares 294,340 Value ($000) $30,129 Avg Close $92.62 Range $78.35 - $102.89

Q4 2022

Shares 293,310 Value ($000) $23,324 Avg Close $81.40 Range $69.31 - $90.71

Q3 2022

Shares 304,100 Value ($000) $21,913 Avg Close $87.60 Range $72.02 - $103.17

Q2 2022

Shares 312,800 Value ($000) $26,726 Avg Close $82.06 Range $76.09 - $87.38

Q1 2022

Shares 323,960 Value ($000) $27,575 Avg Close $84.05 Range $76.35 - $95.63

Q4 2021

Shares 336,630 Value ($000) $31,374 Avg Close $93.81 Range $87.97 - $98.88

Q3 2021

Shares 369,900 Value ($000) $35,067 Avg Close $97.38 Range $91.08 - $101.64

Q2 2021

Shares 379,950 Value ($000) $38,618 Avg Close $97.33 Range $91.95 - $102.24

Q1 2021

Shares 382,850 Value ($000) $36,792 Avg Close $94.91 Range $89.10 - $100.67

Q4 2020

Shares 349,400 Value ($000) $32,571 Avg Close $85.48 Range $76.31 - $94.87

Q3 2020

Shares 354,300 Value ($000) $27,497 Avg Close $74.61 Range $66.11 - $81.69

Q2 2020

Shares 270,100 Value ($000) $20,160 Avg Close $73.05 Range $63.09 - $85.01

Q1 2020

Shares 241,700 Value ($000) $16,658 Avg Close $85.46 Range $49.96 - $102.61

Q4 2019

Shares 236,100 Value ($000) $23,785 Avg Close $98.82 Range $93.98 - $102.81

Q3 2019

Shares 236,100 Value ($000) $23,978 Avg Close $108.01 Range $93.05 - $117.21

Q2 2019

Shares 235,600 Value ($000) $26,536 Avg Close $100.77 Range $85.22 - $114.42

Q1 2019

Shares 258,700 Value ($000) $22,662 Avg Close $83.70 Range $70.22 - $91.19

Q4 2018

Shares 273,700 Value ($000) $20,062 Avg Close $72.14 Range $67.15 - $76.91

Q3 2018

Shares 275,700 Value ($000) $21,039 Avg Close $77.62 Range $73.70 - $82.94

Q2 2018

Shares 301,900 Value ($000) $23,346 Avg Close $69.82 Range $61.72 - $80.19

Q1 2018

Shares 309,281 Value ($000) $20,187 Avg Close $64.89 Range $50.50 - $73.28

Q4 2017

Shares 391,500 Value ($000) $25,205 Avg Close $84.03 Range $53.80 - $96.64

Q3 2017

Shares 424,300 Value ($000) $38,768 Avg Close $81.30 Range $74.96 - $92.34

Q2 2017

Shares 428,800 Value ($000) $32,224 Avg Close $75.70 Range $69.08 - $82.26

Q1 2017

Shares 402,800 Value ($000) $29,400 Avg Close $74.27 Range $69.45 - $81.55

Q4 2016

Shares 362,300 Value ($000) $27,578 Avg Close $72.10 Range $65.00 - $78.86

Q3 2016

Shares 327,000 Value ($000) $21,379 Avg Close $63.03 Range $55.76 - $69.49

Q2 2016

Shares 317,000 Value ($000) $18,427 Avg Close $55.08 Range $48.76 - $66.43

Q1 2016

Shares 16,000 Value ($000) $1,048 Avg Close $66.19 Range $48.19 - $88.33

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	267,710	$68,282	$261.19	$231.66 - $292.34
Q3 2025	306,630	$76,424	$228.27	$204.00 - $249.79
Q2 2025	321,420	$72,275	$213.44	$164.08 - $241.64
Q1 2025	334,330	$64,974	$190.49	$150.84 - $220.00
Q4 2024	297,710	$49,846	$158.52	$129.84 - $189.13
Q3 2024	294,500	$44,714	$143.78	$129.18 - $158.69
Q2 2024	280,620	$38,591	$137.83	$126.57 - $145.25
Q1 2024	293,100	$41,861	$131.26	$120.42 - $144.03
Q4 2023	285,200	$36,805	$119.08	$103.04 - $132.60
Q3 2023	278,990	$32,932	$120.57	$112.19 - $139.90
Q2 2023	290,350	$34,212	$114.74	$99.11 - $127.07
Q1 2023	294,340	$30,129	$92.62	$78.35 - $102.89
Q4 2022	293,310	$23,324	$81.40	$69.31 - $90.71
Q3 2022	304,100	$21,913	$87.60	$72.02 - $103.17
Q2 2022	312,800	$26,726	$82.06	$76.09 - $87.38
Q1 2022	323,960	$27,575	$84.05	$76.35 - $95.63
Q4 2021	336,630	$31,374	$93.81	$87.97 - $98.88
Q3 2021	369,900	$35,067	$97.38	$91.08 - $101.64
Q2 2021	379,950	$38,618	$97.33	$91.95 - $102.24
Q1 2021	382,850	$36,792	$94.91	$89.10 - $100.67
Q4 2020	349,400	$32,571	$85.48	$76.31 - $94.87
Q3 2020	354,300	$27,497	$74.61	$66.11 - $81.69
Q2 2020	270,100	$20,160	$73.05	$63.09 - $85.01
Q1 2020	241,700	$16,658	$85.46	$49.96 - $102.61
Q4 2019	236,100	$23,785	$98.82	$93.98 - $102.81
Q3 2019	236,100	$23,978	$108.01	$93.05 - $117.21
Q2 2019	235,600	$26,536	$100.77	$85.22 - $114.42
Q1 2019	258,700	$22,662	$83.70	$70.22 - $91.19
Q4 2018	273,700	$20,062	$72.14	$67.15 - $76.91
Q3 2018	275,700	$21,039	$77.62	$73.70 - $82.94
Q2 2018	301,900	$23,346	$69.82	$61.72 - $80.19
Q1 2018	309,281	$20,187	$64.89	$50.50 - $73.28
Q4 2017	391,500	$25,205	$84.03	$53.80 - $96.64
Q3 2017	424,300	$38,768	$81.30	$74.96 - $92.34
Q2 2017	428,800	$32,224	$75.70	$69.08 - $82.26
Q1 2017	402,800	$29,400	$74.27	$69.45 - $81.55
Q4 2016	362,300	$27,578	$72.10	$65.00 - $78.86
Q3 2016	327,000	$21,379	$63.03	$55.76 - $69.49
Q2 2016	317,000	$18,427	$55.08	$48.76 - $66.43
Q1 2016	16,000	$1,048	$66.19	$48.19 - $88.33