Position in OPK
as of Mar 31, 2026
· filed May 14, 2026
Position Value
$199,500
-$21,000 QoQ
Shares Held
175,000
0.0% QoQ
Ownership
0.023%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in OPK Over Time
Shares Held
Position Value (USD)
Position in Diagnostics & Research
Healthcare · as of Mar 31, 2026GAMCO INVESTORS, INC. ET AL holds $7,314,895 across 6 Diagnostics & Research names. OPK ranks #6 (2.7% of the industry book) .
All Filings in OPK
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25 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $199,500 | 175,000 | Shares | Sole | 2026-05-14 | |
| 2025-12-31 | $220,500 | 175,000 | Shares | Sole | 2026-02-05 | |
| 2025-09-30 | $271,250 | 175,000 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $231,000 | 175,000 | Shares | Sole | 2025-08-13 | |
| 2025-03-31 | $290,500 | 175,000 | Shares | Sole | 2025-05-14 | |
| 2024-12-31 | $257,250 | 175,000 | Shares | Sole | 2025-02-13 | |
| 2024-09-30 | $260,750 | 175,000 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $218,750 | 175,000 | Shares | Sole | 2024-08-13 | |
| 2024-03-31 | $216,000 | 180,000 | Shares | Sole | 2024-05-14 | |
| 2023-12-31 | $279,350 | 185,000 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $320,000 | 200,000 | Shares | Sole | 2023-11-08 | |
| 2023-06-30 | $434,000 | 200,000 | Shares | Sole | 2023-08-15 | |
| 2023-03-31 | $292,000 | 200,000 | Shares | Sole | 2023-05-12 | |
| 2022-12-31 | $250,000 | 200,000 | Shares | Sole | 2023-02-15 | |
| 2022-09-30 | $378,000 | 200,000 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $506,000 | 200,000 | Shares | Sole | 2022-08-12 | |
| 2022-03-31 | $688,000 | 200,000 | Shares | Sole | 2022-05-18 | |
| 2021-12-31 | $962,000 | 200,000 | Shares | Sole | 2022-02-11 | |
| 2021-09-30 | $730,000 | 200,000 | Shares | Sole | 2021-11-12 | |
| 2021-06-30 | $810,000 | 200,000 | Shares | Sole | 2021-08-13 | |
| 2021-03-31 | $858,000 | 200,000 | Shares | Sole | 2021-05-14 | |
| 2020-12-31 | $869,000 | 220,000 | Shares | Sole | 2021-02-05 | |
| 2020-09-30 | $811,800 | 220,000 | Shares | Sole | 2020-11-06 | |
| 2020-06-30 | $750,200 | 220,000 | Shares | Sole | 2020-08-13 | |
| 2020-03-31 | $294,800 | 220,000 | Shares | Sole | 2020-05-14 | |
| No filing history on record for this holder in this stock. | ||||||