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Of the 11 tracked institutions holding OSIS, 5 have a 3-year clone track record — 4 of them beat the S&P. Average holder's clone alpha: +3.1pt. It's a gauge of who owns the name, not just how many.
Among the 11 tracked institutional investors we monitor, OSIS (OSI SYSTEMS INC) is held with a combined value of $2.02B across 7,702,276 shares. The largest holder is BlackRock, Inc. with a position worth $671.64M (0.01% of their portfolio). Bridgewater Associates, LP opened a new position in the most recent quarter. 5 funds increased their holdings. 5 funds reduced their position.
Total Institutional Value
$2.02B
Total Shares Held
7,702,276
Institutional Holders
11
% of Shares Outstanding
46.7%
of 16.48M shares · SEC 2026-04-28
Days to Cover
11.0-6.5%
2.14M shares short · FINRA 2026-07-15
Tracked 13F institutions hold 46.7% of OSIS's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-04-28), not a live float.
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $671.64M | 0.01% | -1.3% |
| 2 | VANGUARD GROUP INC | $537.31M | 0.01% | -0.0% |
| 3 | FMR LLC | $522.28M | 0.03% | +18.7% |
| 4 | STATE STREET CORP | $175.81M | 0.01% | +0.6% |
| 5 | PRICE T ROWE ASSOCIATES INC /MD/ | $68.91M | 0.01% | +1.8% |
| 6 | WELLINGTON MANAGEMENT GROUP LLP | $24.89M | 0.00% | +88.0% |
| 7 | MILLENNIUM MANAGEMENT LLC | $11.58M | 0.00% | -0.3% |
| 8 | AQR CAPITAL MANAGEMENT LLC | $5.07M | 0.00% | -1.7% |
| 9 | CITADEL ADVISORS LLC | $3.97M | 0.00% | +1112.3% |
| 10 | Bridgewater Associates, LP | $853.35K | 0.00% | New |
As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of OSIS with a position worth $671.64M, representing 0.01% of their portfolio. In total, 11 institutional investors hold OSIS with a combined value of $2.02B.
In the most recent quarter, 1 fund opened a new position in OSIS. Additionally, 5 increased their holdings and 5 reduced their positions.
Institutional investors hold $2.02B worth of OSIS stock across 11 positions. The largest institutional holder is BlackRock, Inc. with $671.64M in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For OSIS, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their OSIS positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
Last Close
$216.70
2026-07-24
YTD
-15.2%
17% of 52-week range
