OptimizeRx
OPRX · NASDAQ
$8.93+$0.19 (+2.17%)TodayMarket closed ·
Prev close $8.74
Who owns OPRX
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 46.5% of OPRX’s shares.
- Whetstone Capital Advisors, LLC8.0%
- Weintraub (Michael)7.4%
- Kennedy Capital Management LLC6.7%
- Royce Investment Partners5.8%
- Next 6 largest institutions18.7%
- All other shareholders53.5%
| Holder | Shares | % of shares |
|---|---|---|
| Whetstone Capital Advisors, LLC | 1.51M | 8.04% |
| Weintraub (Michael) | 1.38M | 7.38% |
| Kennedy Capital Management LLC | 1.25M | 6.65% |
| Royce Investment Partners | 1.09M | 5.80% |
| Vanguard Capital Management, LLC | 699.60K | 3.73% |
| Rice Hall James & Associates, LLC | 633.84K | 3.38% |
| William Blair & Company, L.L.C. (Research) | 607.92K | 3.24% |
| AQR Capital Management, LLC | 583.96K | 3.11% |
| Jacob Asset Management of New York, LLC | 500.19K | 2.66% |
| Dimensional Fund Advisors, L.P. | 477.69K | 2.54% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| FTGF Royce US Small Cap Opportunity Fund | 585.50K | 3.12% |
| Royce Small-Cap Opportunity Fund | 509.76K | 2.72% |
| Vanguard Total Stock Market Index Fund | 494.25K | 2.63% |
| Jacob Internet Fund | 344.10K | 1.83% |
| DFA US Small Cap Value Portfolio | 229.46K | 1.22% |
Insider trades
Form 4 filings by officers, directors and large holders
Insiders made no open-market buys or sales of OPRX in the last 6 months.
| Insider | Type | Shares | Value |
|---|---|---|---|
| D'Silva Andrew J. | Tax withholding | 414 | $3.47K |
| D'Silva Andrew J. | Tax withholding | 1.43K | $11.26K |
| Merrell Brendan W. | Tax withholding | 1.02K | $7.86K |
| Silvestro Stephen L | Tax withholding | 1.74K | $13.39K |
| Odence-Ford Marion | Tax withholding | 1.53K | $11.79K |
| D'Silva Andrew J. | Tax withholding | 1.24K | $9.58K |
| Stelmakh Edward | Tax withholding | 1.38K | $10.65K |
| Silvestro Stephen L | Award | 79.20K | — |
| D'Silva Andrew J. | Award | 57.60K | — |
| Merrell Brendan W. | Award | 57.60K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 1.12M
- Days to cover
- 5.77
- % of shares outstanding
- 5.95%
- Average daily volume
- 193.60K
- Change since last report
- +10.6%
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