Position in OSIS
as of Mar 31, 2026
· filed May 8, 2026
Position Value
$45,579,305
-$3,220,304 QoQ
Shares Held
171,667
-10.3% QoQ
Ownership
1.04%
of shares outstanding
% of Portfolio
0.15%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Dec 2025
2 quarters on record
Voting authority
Sole 78.28178974409758.ToString("F0")%
Shared 0.ToString("F0")%
None 21.718210255902413.ToString("F0")%
Common Shares in OSIS Over Time
Shares Held
Position Value (USD)
Position in Electronic Components
Technology · as of Mar 31, 2026WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC holds $428,759,786 across 9 Electronic Components names. OSIS ranks #4 (10.6% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | APH |
Amphenol Corp /De/
|
1,077,434 | $136,133,785 | |
| 2 | LFUS |
Littelfuse Inc /De
|
304,575 | $103,357,526 | |
| 3 | FN |
Fabrinet
|
164,830 | $85,962,141 | |
| 4 | OSIS |
Osi Systems Inc
This page
|
171,667 | $45,579,305 | |
| 5 | KN |
Knowles Corp
|
1,274,700 | $32,734,296 | |
| 6 | SANM |
Sanmina Corp
|
101,655 | $13,178,554 | |
| 7 | CLS |
Celestica Inc
|
38,716 | $10,905,522 | |
| 8 | FLEX |
Flex Ltd.
|
8,476 | $554,838 |
All Filings in OSIS
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2 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $45,579,305 | 171,667 | Shares | Sole | 2026-05-08 | |
| 2025-12-31 | $48,799,609 | 191,326 | Shares | Sole | 2026-02-09 | |
| No filing history on record for this holder in this stock. | ||||||