OPTIMIZERX CORP OPRX
COM NEW · Common Stock · CUSIP 68401U204 · ISIN US68401U2042
- SectorIndustrials
- IndustryServices-Business Services, NEC
- HeadquartersWaltham, MA
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($18.2k this quarter). Holder counts are more reliable. Shares outstanding: 18.8m as of 2026-07-30, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $5.72. Options: 5 managers hold calls ($689.3k notional), 4 hold puts ($447.3k).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 128 |
| Q4 2022 | 129 |
| Q1 2023 | 111 |
| Q2 2023 | 103 |
| Q3 2023 | 96 |
| Q4 2023 | 99 |
| Q1 2024 | 98 |
| Q2 2024 | 93 |
| Q3 2024 | 86 |
| Q4 2024 | 88 |
| Q1 2025 | 88 |
| Q2 2025 | 112 |
| Q3 2025 | 125 |
| Q4 2025 | 129 |
| Q1 2026 | 128 |
| Q2 2026 | 113 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 39 | 42 |
| Q4 2024 | 48 | 36 |
| Q1 2025 | 42 | 43 |
| Q2 2025 | 63 | 32 |
| Q3 2025 | 67 | 59 |
| Q4 2025 | 63 | 62 |
| Q1 2026 | 73 | 57 |
| Q2 2026 | 55 | 78 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $3.5m | $1.2m | 0.35 |
| Q4 2025 | $1.5m | $11.0k | 0.01 |
| Q1 2026 | $1.3m | $339.7k | 0.26 |
| Q2 2026 | $689.3k | $447.3k | 0.65 |
Biggest buyers
| AQR CAPITAL MANAGEMENT LLC | Added | +369.0k |
| ROYCE & ASSOCIATES LP | Added | +201.4k |
| CITADEL ADVISORS LLC | New | +158.0k |
| Mink Brook Asset Management LLC | New | +141.2k |
| Janney Montgomery Scott LLC | New | +136.0k |
| MARSHALL WACE, LLP | Added | +130.9k |
| JANE STREET GROUP, LLC | New | +122.1k |
| MORGAN STANLEY | Added | +79.9k |
| P.A.W. CAPITAL CORP | Added | +70.0k |
| Point72 Asset Management, L.P. | New | +55.6k |
Biggest sellers
| BlackRock, Inc. | Reduced | -718.1k |
| STATE STREET CORP | Reduced | -397.2k |
| Parkman Healthcare Partners LLC | Reduced | -379.0k |
| GOLDMAN SACHS GROUP INC | Reduced | -253.4k |
| Invenomic Capital Management LP | Sold out | -229.4k |
| SEGALL BRYANT & HAMILL, LLC | Sold out | -188.7k |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | -184.8k |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Reduced | -161.5k |
| Squarepoint Ops LLC | Reduced | -132.5k |
| LPL Financial LLC | Sold out | -129.6k |
Biggest calls
| JANE STREET GROUP, LLC | Added | $216.8k37.9k shares |
| IMC-Chicago, LLC | Reduced | $173.3k30.3k shares |
| CITADEL ADVISORS LLC | Reduced | $136.1k23.8k shares |
| GROUP ONE TRADING LLC | Added | $127.6k22.3k shares |
| SIMPLEX TRADING, LLC | Reduced | $35.5k6.2k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $218.5k38.2k shares |
| CITADEL ADVISORS LLC | New | $184.2k32.2k shares |
| SIMPLEX TRADING, LLC | Added | $36.6k6.4k shares |
| GROUP ONE TRADING LLC | Added | $8.0k1.4k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
Whetstone Capital Advisors, LLC
13D · may seek influence
no change · filed 2025-04-21
Stated purposeThis Amendment hereby amends and supplements Item 4 of the Schedule 13D by inserting the following: On April 18, 2025, WCA submitted to the Issuer a conditional withdrawal of its notice of intent to nominate two candidates for election to the Board at the Issuer's 2025 annual meeting of stockholders (the "Conditional Withdrawal"). The Conditional Withdrawal became effective on the same day, following the Issuer's issuance of a press release announcing its intention to appoint a new independent director to its Board prior to the end of 2025. The Conditional Withdrawal followed discussions held between WCA and the Issuer, and was in connection with a number of actions announced by the Issuer regarding Board refreshment and future strategy. The Reporting Persons intend to review their inv… Full filing |
8.2% |
| ROYCE & ASSOCIATES LP 13G · exempt (held before listing) +1.2 pts · filed 2026-10-21 | 7.0% |
| KENNEDY CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-08-14 | 6.7% |
Fell to 5% or below in the last year: BlackRock, Inc. (1.8%, 2026-07-29), VANGUARD GROUP INC (0.0%, 2026-03-27)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 1 | $100.2k | 0 | — | — |
| Q1 2025 | 1 | $2.4m | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 1 | $194.5k | — |
| Q4 2025 | 0 | — | 1 | $30.4k | — |
| Q1 2026 | 0 | — | 0 | — | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 0 | — | 0 | — | — |
None reported since 1 Apr 2026.
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| Whetstone Capital Advisors, LLC 2.29% of their portfolio | 1.5m $8.6m | Unchanged |
| ROYCE & ASSOCIATES LP 0.05% of their portfolio | 1.1m $6.2m | Added +201.4k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 699.6k $4.0m | Added +14.2k |
| KENNEDY CAPITAL MANAGEMENT LLC 0.07% of their portfolio | 644.1k $3.7m | Reduced -12.1k |
| RICE HALL JAMES & ASSOCIATES, LLC 0.18% of their portfolio | 633.8k $3.6m | Added +31.9k |
| BLAIR WILLIAM & CO/IL 0.01% of their portfolio | 607.9k $3.5m | Reduced -7.1k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 584.0k $3.3m | Added +369.0k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 477.7k $2.7m | Reduced -85.9k |
| BlackRock, Inc. 0.00% of their portfolio | 445.4k $2.5m | Reduced -718.1k |
| Parkman Healthcare Partners LLC 0.21% of their portfolio | 350.3k $2.0m | Reduced -379.0k |
| Bullseye Asset Management LLC 0.75% of their portfolio | 258.3k $1.5m | Added +31.8k |
| AWM Investment Company, Inc. 0.12% of their portfolio | 240.4k $1.4m | Added +10.0k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 207.3k $1.2m | Reduced -184.8k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 169.5k $969.8k | Reduced -161.5k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 167.7k $959.2k | Reduced -49.2k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 162.2k $927.7k | Added +130.9k |
| P.A.W. CAPITAL CORP 0.70% of their portfolio | 160.0k $915.2k | Added +70.0k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 158.0k $903.7k | New |
| MORGAN STANLEY 0.00% of their portfolio | 156.3k $894.1k | Added +79.9k |
| Mink Brook Asset Management LLC 0.36% of their portfolio | 141.2k $807.9k | New |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 138.1k $789.8k | Reduced -4.8k |
| Janney Montgomery Scott LLC 0.00% of their portfolio | 136.0k $778.0k | New |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 122.1k $698.3k | New |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 105.0k $600.8k | Reduced -253.4k |
| Quantinno Capital Management LP 0.00% of their portfolio | 99.1k $567.0k | Added +50.1k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 98.0k $560.6k | Reduced -13.1k |
| Trexquant Investment LP 0.00% of their portfolio | 89.7k $512.9k | Reduced -47.2k |
| CREDIT AGRICOLE S A 0.00% of their portfolio | 89.2k $510.2k | Unchanged |
| STATE STREET CORP 0.00% of their portfolio | 80.6k $461.0k | Reduced -397.2k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 78.8k $450.7k | Added +53.5k |
| AVENIR CORP 0.05% of their portfolio | 73.9k $422.5k | Reduced -3.4k |
| Man Group plc 0.00% of their portfolio | 72.3k $413.8k | Added +33.4k |
| PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio | 68.1k $389.8k | Added +4.3k |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 67.3k $384.8k | Reduced -53.7k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 64.7k $370.1k | Reduced -37.7k |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 58.9k $326.6k | Added +45.7k |
| Point72 Asset Management, L.P. 0.00% of their portfolio | 55.6k $318.1k | New |
| UBS Group AG 0.00% of their portfolio | 55.5k $317.6k | Reduced -23.7k |
| Jain Global LLC 0.00% of their portfolio | 51.7k $295.6k | New |
| Campbell & CO Investment Adviser LLC 0.02% of their portfolio | 51.1k $292.5k | Added +18.3k |
| XTX Topco Ltd 0.00% of their portfolio | 46.5k $266.0k | Added +28.1k |
| Squarepoint Ops LLC 0.00% of their portfolio | 45.1k $257.8k | Reduced -132.5k |
| SEI INVESTMENTS CO 0.00% of their portfolio | 41.4k $236.9k | Reduced -57.2k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 39.0k $223.1k | Added +27.6k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 37.0k $211.6k | Reduced -118.4k |
| HRT FINANCIAL LP 0.00% of their portfolio | 35.7k $204.0k | New |
| Samjo Management, LLC 0.06% of their portfolio | 32.0k $183.0k | New |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 26.6k $151.9k | Reduced -17.3k |
| Quadrature Capital Ltd 0.00% of their portfolio | 25.6k $146.7k | New |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 25.2k $143.9k | Added +989 |
| 9823 Capital, L.P. 0.09% of their portfolio | 24.6k $140.7k | New |
| FMR LLC 0.00% of their portfolio | 23.4k $133.7k | Reduced -46.1k |
| Hillsdale Investment Management Inc. 0.00% of their portfolio | 20.3k $116.1k | Unchanged |
| CANADA PENSION PLAN INVESTMENT BOARD 0.00% of their portfolio | 19.3k $110.4k | Unchanged |
| Engineers Gate Manager LP 0.00% of their portfolio | 17.5k $100.4k | Added +1.1k |
| Centiva Capital, LP 0.00% of their portfolio | 17.0k $97.3k | Reduced -9.6k |
| McAdam, LLC 0.00% of their portfolio | 16.6k $94.7k | Added +6.1k |
| IEQ CAPITAL, LLC 0.00% of their portfolio | 15.2k $87.2k | New |
| BARCLAYS PLC 0.00% of their portfolio | 15.0k $85.7k | Added +10.4k |
| PERKINS CAPITAL MANAGEMENT INC 0.06% of their portfolio | 14.8k $84.7k | Reduced -1.1k |
| Schonfeld Strategic Advisors LLC 0.00% of their portfolio | 14.2k $81.4k | Reduced -60.5k |
| MERCER GLOBAL ADVISORS INC /ADV 0.00% of their portfolio | 13.9k $79.5k | Added +1.3k |
| Corient Private Wealth LP 0.00% of their portfolio | 13.4k $76.6k | New |
| PharVision Advisers, LLC 1.39% of their portfolio | 12.9k $73.8k | New |
| ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio | 12.9k $73.0k | Added +4.4k |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC 0.00% of their portfolio | 12.3k $78.9k | New |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 11.7k $66.7k | Reduced -6.6k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio | 11.4k $65.2k | Reduced -57.1k |
| Mariner, LLC 0.00% of their portfolio | 10.2k $58.5k | New |
| State of Alaska, Department of Revenue 0.00% of their portfolio | 10.1k $57.0k | Unchanged |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 8.0k $45.8k | Reduced -12.2k |
| CITIGROUP INC 0.00% of their portfolio | 7.8k $44.9k | Added +7.0k |
| Vanguard Global Advisers, LLC 0.00% of their portfolio | 6.9k $39.5k | Reduced -78.5k |
| Arax Advisory Partners 0.00% of their portfolio | 2.2k $12.8k | Added +2.2k |
| PNC Financial Services Group, Inc. 0.00% of their portfolio | 2.0k $11.6k | Added +1.9k |
| Integrated Wealth Concepts LLC 0.00% of their portfolio | 2.0k $11.5k | Reduced -12.0k |
| Avalon Trust Co 0.00% of their portfolio | 2.0k $11.4k | Unchanged |
| HUNTINGTON NATIONAL BANK 0.00% of their portfolio | 1.8k $10.2k | New |
| BARD ASSOCIATES INC 0.00% of their portfolio | 1.5k $8.5k | Unchanged |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 1.2k $6.7k | Reduced -142 |
| Versant Capital Management, Inc 0.00% of their portfolio | 1.1k $6.1k | Reduced -980 |
| Steward Partners Investment Advisory, LLC 0.00% of their portfolio | 1.0k $5.7k | Unchanged |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 940 $5.4k | Unchanged |
| GAMMA Investing LLC 0.00% of their portfolio | 910 $5.2k | Reduced -113 |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 885 $5.1k | Reduced -124.6k |
| AdvisorNet Financial, Inc 0.00% of their portfolio | 600 $3.4k | Unchanged |
| IFP Advisors, Inc 0.00% of their portfolio | 557 $3.2k | Added +418 |
| EverSource Wealth Advisors, LLC 0.00% of their portfolio | 439 $2.5k | Added +236 |
| Compagnie Lombard Odier SCmA 0.00% of their portfolio | 410 $2.3k | Unchanged |
| Allworth Financial LP 0.00% of their portfolio | 389 $2.2k | Added +162 |
| Global Retirement Partners, LLC 0.00% of their portfolio | 372 $2.1k | First filing |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 363 $2.1k | Reduced -45 |
| NISA INVESTMENT ADVISORS, LLC 0.00% of their portfolio | 303 $1.7k | Unchanged |
| Bogart Wealth, LLC 0.00% of their portfolio | 285 $1.6k | New |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 273 $1.0k | Added +11 |
| ROTHSCHILD INVESTMENT LLC 0.00% of their portfolio | 255 $1.5k | Added +190 |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 211 $1.1k | Reduced -7.2k |
| Farther Finance Advisors, LLC 0.00% of their portfolio | 203 $1.2k | Added +83 |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 200 $1.1k | Reduced -4.0k |
| Leonteq Securities AG 0.00% of their portfolio | 139 $795 | Unchanged |