OSI Systems, Inc.
DE ˙ DB ˙ US6710441055
180,25 € ↓ -0,35 (-0,19%)
2026-06-04
DEL PRIS
SecurityDE:OS2 / OSI Systems, Inc.
InstitutionPrimecap Management Co/ca/
Latest Disclosed Ownership244,660 shares
Latest Disclosed Value $ 64,959,677
Primecap Management Co/ca/ reports 8.61% decrease in ownership of OS2 / OSI Systems, Inc.

On May 11, 2026 - Primecap Management Co/ca/ filed a 13F-HR form disclosing ownership of 244,660 shares of OSI Systems, Inc. (DE:OS2) valued at $55,782,480 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 267,710 shares of OSI Systems, Inc.. This represents a change in shares of -8.61% during the quarter. The current value of the position is $44,099,965 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-11 2026-03-31 13F OSI SYSTEMS COM 671044105 244,660 -23,050 -8.61 64,960 -4.87 0.0511
2026-02-11 2025-12-31 13F OSI SYSTEMS COM 671044105 267,710 -38,920 -12.69 68,282 -10.65 0.0517
2025-11-12 2025-09-30 13F OSI SYSTEMS COM 671044105 306,630 -14,790 -4.60 76,424 5.74 0.0585
2025-08-11 2025-06-30 13F OSI SYSTEMS COM 671044105 321,420 -12,910 -3.86 72,275 11.24 0.0573
2025-05-09 2025-03-31 13F OSI SYSTEMS COM 671044105 334,330 36,620 12.30 64,974 30.35 0.0537
2025-02-10 2024-12-31 13F OSI SYSTEMS COM 671044105 297,710 3,210 1.09 49,846 11.48 0.0386
2024-11-08 2024-09-30 13F OSI SYSTEMS COM 671044105 294,500 13,880 4.95 44,714 15.87 0.0329
2024-08-09 2024-06-30 13F OSI SYSTEMS COM 671044105 280,620 -12,480 -4.26 38,591 -7.81 0.0279
2024-05-14 2024-03-31 13F OSI SYSTEMS COM 671044105 293,100 7,900 2.77 41,861 13.73 0.0312
2024-02-09 2023-12-31 13F OSI SYSTEMS COM 671044105 285,200 6,210 2.23 36,805 11.76 0.0291
2023-11-13 2023-09-30 13F OSI SYSTEMS COM 671044105 278,990 -11,360 -3.91 32,932 -3.74 0.0278
2023-08-11 2023-06-30 13F OSI SYSTEMS COM 671044105 290,350 -3,990 -1.36 34,212 13.55 0.0286
2023-05-15 2023-03-31 13F OSI SYSTEMS COM 671044105 294,340 1,030 0.35 30,129 29.17 0.0263
2023-02-13 2022-12-31 13F OSI SYSTEMS COM 671044105 293,310 -10,790 -3.55 23,324 6.44 0.0214
2022-11-14 2022-09-30 13F OSI SYSTEMS COM 671044105 304,100 -8,700 -2.78 21,913 -18.01 0.0212
2022-08-11 2022-06-30 13F OSI SYSTEMS COM 671044105 312,800 -11,160 -3.44 26,726 -3.08 0.0239
2022-05-11 2022-03-31 13F OSI SYSTEMS COM 671044105 323,960 -12,670 -3.76 27,575 -12.11 0.0208
2022-02-11 2021-12-31 13F OSI SYSTEMS COM 671044105 336,630 -33,270 -8.99 31,374 -10.53 0.0217
2021-11-12 2021-09-30 13F OSI SYSTEMS COM 671044105 369,900 -10,050 -2.65 35,067 -9.20 0.0248
2021-08-10 2021-06-30 13F OSI SYSTEMS COM 671044105 379,950 -2,900 -0.76 38,618 4.96 0.0259
2021-05-14 2021-03-31 13F OSI SYSTEMS COM 671044105 382,850 33,450 9.57 36,792 12.96 0.0257
2021-02-08 2020-12-31 13F OSI SYSTEMS COM 671044105 349,400 -4,900 -1.38 32,571 18.45 0.0242
2020-11-13 2020-09-30 13F OSI SYSTEMS COM 671044105 354,300 84,200 31.17 27,497 36.39 0.0227
2020-08-13 2020-06-30 13F OSI SYSTEMS COM 671044105 270,100 28,400 11.75 20,160 21.02 0.0173
2020-05-14 2020-03-31 13F OSI SYSTEMS COM 671044105 241,700 5,600 2.37 16,658 -29.96 0.0163
2020-02-14 2019-12-31 13F OSI SYSTEMS COM 671044105 236,100 0 0.00 23,785 -0.80 0.0173
2019-11-13 2019-09-30 13F OSI SYSTEMS COM 671044105 236,100 500 0.21 23,978 -9.64 0.0192
2019-08-14 2019-06-30 13F OSI SYSTEMS COM 671044105 235,600 -23,100 -8.93 26,536 17.09 0.0196
2019-05-14 2019-03-31 13F OSI SYSTEMS COM 671044105 258,700 -15,000 -5.48 22,662 12.96 0.0167
2019-02-12 2018-12-31 13F OSI SYSTEMS COM 671044105 273,700 -2,000 -0.73 20,062 -4.64 0.0163
2018-11-13 2018-09-30 13F OSI SYSTEMS COM 671044105 275,700 -26,200 -8.68 21,039 -9.88 0.0142
2018-08-13 2018-06-30 13F OSI SYSTEMS COM 671044105 301,900 -7,381 -2.39 23,346 15.65 0.0173
2018-05-14 2018-03-31 13F OSI SYSTEMS COM 671044105 309,281 -82,219 -21.00 20,187 -19.91 0.0151
2018-02-13 2017-12-31 13F OSI SYSTEMS COM 671044105 391,500 -32,800 -7.73 25,205 -34.99 0.0193
2017-11-13 2017-09-30 13F OSI SYSTEMS COM 671044105 424,300 -4,500 -1.05 38,768 20.31 0.0321
2017-08-11 2017-06-30 13F OSI SYSTEMS COM 671044105 428,800 26,000 6.45 32,224 9.61 0.0277
2017-05-12 2017-03-31 13F OSI SYSTEMS COM 671044105 402,800 40,500 11.18 29,400 6.61 0.0267
2017-02-13 2016-12-31 13F OSI SYSTEMS COM 671044105 362,300 35,300 10.80 27,578 29.00 0.0271
2016-11-14 2016-09-30 13F OSI SYSTEMS COM 671044105 327,000 10,000 3.15 21,379 16.02 0.0213
2016-08-12 2016-06-30 13F OSI SYSTEMS COM 671044105 317,000 301,000 1,881.25 18,427 1,658.30 0.0196
2016-05-12 2016-03-31 13F OSI SYSTEMS COM 671044105 16,000 16,000 1,048 0.0011
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.