Osi Systems Inc
OSIS- Exchange
- Nasdaq
- Industry
- Semiconductors & Related Devices
- SEC CIK
- 0001039065
No open-market purchases or sales by Osi Systems Inc insiders were filed in the last 90 days; 365 institutions reported holding it in 13F filings for Q2 2026, worth $4.14B in total; no superinvestor holds it.
Holders of 5% or more of OSIS
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Osi Systems Inc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 14.20%2.39M shares | – | Jul 18, 20251 filing | Jul 18, 2025 | SEC |
| FMR LLC | 13G/A | 7.30%1.24M shares | +2.20 ppfrom 5.10% | Feb 12, 20252 filings | May 12, 2025 | SEC |
| Janus Henderson Group PLC | 13G/A | 6.30%1.05M shares | −1.10 ppfrom 7.40% | Feb 14, 20253 filings | Aug 14, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
6 Schedule 13D and 13G filings on Osi Systems Inc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Nov 14, 202512:40 PM ET | Janus Henderson Group PLC | 13G/A | 5.90%1.00M shares | −0.40 ppfrom 6.30% | Sep 30, 2025 | SEC |
| Nov 12, 202511:37 AM ET | Mawer Investment Management Ltd. | 13G | 5.09%856.4K shares | New | Sep 30, 2025 | SEC |
| Aug 14, 202511:42 AM ET | Janus Henderson Group PLC | 13G/A | 6.30%1.05M shares | −1.10 ppfrom 7.40% | Jun 30, 2025 | SEC |
| Jul 18, 20258:39 PM ET | BlackRock, Inc. | 13G/A | 14.20%2.39M shares | – | Jun 30, 2025 | SEC |
| May 14, 202512:26 PM ET | Janus Henderson Group PLC | 13G/A | 7.40%1.24M shares | 0.00 ppfrom 7.40% | Mar 31, 2025 | SEC |
| May 12, 202510:39 AM ET | FMR LLCand 1 other | 13G/A | 7.30%1.24M shares | +2.20 ppfrom 5.10% | Mar 31, 2025 | SEC |
| Feb 14, 202512:22 PM ET | Janus Henderson Group PLC | 13G/A | 7.40%1.23M shares | – | Dec 31, 2024 | SEC |
| Feb 12, 20259:25 AM ET | FMR LLCand 1 other | 13G | 5.10%847.9K shares | New | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Osi Systems Inc shares.
No Form 144 notices for Osi Systems Inc are on file.