OSIS
OSI SYSTEMS, INC.Marquee-fund ownership over time
This quarter's activity
New positions opened
Positions exited
None.
Current holders
Sorted by tenure (longest first)| Fund | First disclosed | Held | Entry price | Latest close | Return on entry |
|---|---|---|---|---|---|
| Bridgewater Associates re-entered | Q3 2024 | 7Q | $139 | $208 | +49% |
| Two Sigma Investments re-entered | Q3 2024(8Q snapshot) | 7Q | $139 | $208 | +49% |
| D.E. Shaw | Q3 2024(8Q snapshot) | 7Q | $139 | $208 | +49% |
| AQR Capital Management | Q3 2024(8Q snapshot) | 7Q | $139 | $208 | +49% |
| Millennium Management re-entered | Q3 2024(8Q snapshot) | 7Q | $139 | $208 | +49% |
“Return on entry” is the price-only move from the fund's first disclosure to today — it ignores any adds, trims, or dividends. A fund that built its position over multiple quarters has a true cost basis somewhere between entry price and latest close; this figure is the upper bound.
Past holders
Funds that exited at some point| Fund | Last entry | Exited | Entry → Exit | Return |
|---|---|---|---|---|
| Citadel Advisors 3× in & out | Q4 2025 | Q1 2026 | — | +0% |
| Point72 Asset Management | Q2 2025 | Q1 2026 | → $265 | +16% |
| Renaissance Technologies | Q3 2024 | Q1 2025 | → $211 | +51% |
Insider activity
Form 4 — officers, directors, 10%+ ownersFiled within two business days of each transaction by anyone with material insider status at OSI SYSTEMS INC. Pair with the holders table above as a sanity check: heavy insider buying alongside marquee-fund accumulation is the strongest accumulation signal; heavy insider selling alongside fund exits is the strongest distribution signal.
30d / 90d windows measured from May 5, 2026 — the most recent Form 4 on file — not from today.
- Form 40001047058-26-000006May 5, 2026
- Form 40001338283-26-000004Apr 24, 2026
- Form 40001047058-26-000004Feb 4, 2026
- Form 40001338283-26-000002Jan 2, 2026
- Form 40001286090-26-000002Jan 2, 2026
- Form 40001628328-26-000002Jan 2, 2026
- Form 40001505398-26-000002Jan 2, 2026
- Form 40001047058-26-000002Jan 2, 2026
- Form 40001584218-26-000002Jan 2, 2026
- Form 40001195340-26-000002Jan 2, 2026
- Form 40001047059-26-000002Jan 2, 2026
- Form 40001195340-25-000005Dec 29, 2025
- Form 40000898243-25-000031Dec 16, 2025
- Form 40001286090-25-000004Dec 16, 2025
- Form 40001047059-25-000004Dec 12, 2025
Fundamentals
XBRL · OSI SYSTEMS, INC.Annual figures sourced directly from OSI SYSTEMS, INC.'s 10-K / 10-Q filings via SEC EDGAR XBRL. Latest fiscal year and the year-over-year change, with up to ten years of history.
Recent SEC filings
10-K · 10-Q · 8-K · 13D/G · proxyThe most recent material filings for OSI SYSTEMS INC — earnings, material events, ownership disclosures, proxy statements. Form 4 insider activity is shown in the panel above.
- 10-QQuarterly reportMay 4, 2026
- 8-KFORM 8-KMay 4, 2026
- 10-QQuarterly reportJan 29, 2026
- 8-KFORM 8-KJan 29, 2026
- 8-KFORM 8-KDec 11, 2025
- 8-KFORM 8-KNov 20, 2025
- 8-KFORM 8-KNov 18, 2025
- 8-KFORM 8-KNov 17, 2025
- 10-QQuarterly reportOct 30, 2025
- 8-KFORM 8-KOct 30, 2025
- DEF 14AProxy statementOct 22, 2025
- 10-KAnnual reportAug 25, 2025
- 8-KFORM 8-KAug 21, 2025
- 8-KFORM 8-KJul 2, 2025
- 8-KFORM 8-KMay 28, 2025
Trade history
Every open→close lifecycle across tracked funds| Fund | Open date | Close date | Open price | Close price / current | Return |
|---|---|---|---|---|---|
| Bridgewater Associates | Q2 2026 | open | $205 | $213 | +4% |
| Two Sigma Investments | Q2 2026 | open | $205 | $208 | +1% |
| Citadel Advisors | Q4 2025 | Q1 2026 | $0.00 | — | +0% |
| Citadel Advisors | Q3 2025 | open | $233 | $208 | -11% |
| Two Sigma Investments | Q3 2025 | Q1 2026 | $233 | $265 | +13% |
| Millennium Management | Q3 2025 | open | $233 | $208 | -11% |
| Point72 Asset Management | Q2 2025 | Q1 2026 | $228 | $265 | +16% |
| Bridgewater Associates | Q3 2024 | Q1 2025 | $139 | $211 | +52% |
| Citadel Advisors | Q3 2024 | Q2 2025 | $139 | $228 | +64% |
| Two Sigma Investments | Q3 2024 | Q2 2025 | $139 | $228 | +64% |
| D.E. Shaw | Q3 2024 | open | $139 | $208 | +49% |
| AQR Capital Management | Q3 2024 | open | $139 | $208 | +49% |
| Millennium Management | Q3 2024 | Q2 2025 | $139 | $228 | +64% |
| Renaissance Technologies | Q3 2024 | Q1 2025 | $140 | $211 | +51% |
- Covers only the 27 marquee funds tracked here, not the full institutional universe. A “0 holders” reading does not mean unowned.
- Heavy funds (Renaissance Technologies, Citadel Advisors, Soros Fund Management, Two Sigma Investments, D.E. Shaw, AQR Capital Management, Millennium Management, Point72 Asset Management) use 8-quarter snapshots, so their pre-2024 history is missing.
- “Current” reflects each fund's most recent 13F — filings lag the actual trade by up to 45 days; positions shown may have changed since.
- Cost = price at the entry filing date. Re-entered positions show the most recent open lot.
- Options, ADRs, and unmapped CUSIPs are excluded from the follower-backtest pipeline that produces these snapshots, so certain holding types won't appear here.