WALTHAM, MA
OPTIMIZERX CORPOPRX— Latest position per institution from SEC 13F filings
15
Institutional holders
16.60M
Total shares held
135.86M
Estimated value
830.02K
Avg. position size
FIRST LIGHT ASSET MANAGEMENT, LLC
CIK 1600004
Shares
1.81M
Value
13.99M
Filed
Sep 30, 2024
WHETSTONE CAPITAL ADVISORS, LLC
CIK 1607278
Shares
1.51M
Value
9.47M
Filed
Mar 31, 2026
DIVISADERO STREET CAPITAL MANAGEMENT, LP
CIK 1901865
Shares
1.32M
Value
13.16M
Filed
Jun 30, 2024
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
1.18M
Value
11.75M
Filed
Jun 30, 2024
BLACKROCK, INC.
CIK 2012383
Shares
1.16M
Value
7.31M
Filed
Mar 31, 2026
VANGUARD GROUP INC
CIK 102909
Shares
1.14M
Value
13.94M
Filed
Dec 31, 2025
SAMJO MANAGEMENT, LLC
CIK 1986590
Shares
1.04M
Value
8.07M
Filed
Sep 30, 2024
ROYCE & ASSOCIATES LP
CIK 906304
Shares
888.03K
Value
5.58M
Filed
Mar 31, 2026
PARKMAN HEALTHCARE PARTNERS LLC
CIK 1777015
Shares
729.37K
Value
4.58M
Filed
Mar 31, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
685.45K
Value
4.30M
Filed
Mar 31, 2026
KENNEDY CAPITAL MANAGEMENT LLC
CIK 884589
Shares
656.26K
Value
4.12M
Filed
Mar 31, 2026
BLAIR WILLIAM & CO/IL
CIK 902367
Shares
614.99K
Value
3.86M
Filed
Mar 31, 2026
RICE HALL JAMES & ASSOCIATES, LLC
CIK 1230765
Shares
601.92K
Value
3.78M
Filed
Mar 31, 2026
DIMENSIONAL FUND ADVISORS LP
CIK 354204
Shares
563.57K
Value
3.54M
Filed
Mar 31, 2026
NEXT CENTURY GROWTH INVESTORS LLC
CIK 1134007
Shares
505.41K
Value
6.20M
Filed
Dec 31, 2025
CASDIN CAPITAL, LLC
CIK 1534261
Shares
500K
Value
7.32M
Filed
Mar 31, 2023
STATE STREET CORP
CIK 93751
Shares
477.78K
Value
3M
Filed
Mar 31, 2026
WASATCH ADVISORS LP
CIK 814133
Shares
458.64K
Value
6.55M
Filed
Jun 30, 2023
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
392.13K
Value
2.46M
Filed
Mar 31, 2026
JACOB ASSET MANAGEMENT OF NEW YORK LLC
CIK 1279256
Shares
370.33K
Value
2.88M
Filed
Sep 30, 2023
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | FIRST LIGHT ASSET MANAGEMENT, LLC | 1600004 | 1.81M | 13.99M | Sep 30, 2024 |
| 2 | WHETSTONE CAPITAL ADVISORS, LLC | 1607278 | 1.51M | 9.47M | Mar 31, 2026 |
| 3 | DIVISADERO STREET CAPITAL MANAGEMENT, LP | 1901865 | 1.32M | 13.16M | Jun 30, 2024 |
| 4 | BLACKROCK FINANCE, INC. | 1364742 | 1.18M | 11.75M | Jun 30, 2024 |
| 5 | BLACKROCK, INC. | 2012383 | 1.16M | 7.31M | Mar 31, 2026 |
| 6 | VANGUARD GROUP INC | 102909 | 1.14M | 13.94M | Dec 31, 2025 |
| 7 | SAMJO MANAGEMENT, LLC | 1986590 | 1.04M | 8.07M | Sep 30, 2024 |
| 8 | ROYCE & ASSOCIATES LP | 906304 | 888.03K | 5.58M | Mar 31, 2026 |
| 9 | PARKMAN HEALTHCARE PARTNERS LLC | 1777015 | 729.37K | 4.58M | Mar 31, 2026 |
| 10 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 685.45K | 4.30M | Mar 31, 2026 |
| 11 | KENNEDY CAPITAL MANAGEMENT LLC | 884589 | 656.26K | 4.12M | Mar 31, 2026 |
| 12 | BLAIR WILLIAM & CO/IL | 902367 | 614.99K | 3.86M | Mar 31, 2026 |
| 13 | RICE HALL JAMES & ASSOCIATES, LLC | 1230765 | 601.92K | 3.78M | Mar 31, 2026 |
| 14 | DIMENSIONAL FUND ADVISORS LP | 354204 | 563.57K | 3.54M | Mar 31, 2026 |
| 15 | NEXT CENTURY GROWTH INVESTORS LLC | 1134007 | 505.41K | 6.20M | Dec 31, 2025 |
| 16 | CASDIN CAPITAL, LLC | 1534261 | 500K | 7.32M | Mar 31, 2023 |
| 17 | STATE STREET CORP | 93751 | 477.78K | 3M | Mar 31, 2026 |
| 18 | WASATCH ADVISORS LP | 814133 | 458.64K | 6.55M | Jun 30, 2023 |
| 19 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 392.13K | 2.46M | Mar 31, 2026 |
| 20 | JACOB ASSET MANAGEMENT OF NEW YORK LLC | 1279256 | 370.33K | 2.88M | Sep 30, 2023 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.