BRANFORD, CT
QUANTUM-SI INCQSI— Latest position per institution from SEC 13F filings
15
Institutional holders
67.39M
Total shares held
67.46M
Estimated value
3.37M
Avg. position size
VANGUARD GROUP INC
CIK 102909
Shares
9.61M
Value
10.57M
Filed
Dec 31, 2025
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
7.58M
Value
6.71M
Filed
Jun 30, 2026
ARK INVESTMENT MANAGEMENT LLC
CIK 1697748
Shares
7.17M
Value
6.34M
Filed
Jun 30, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
7M
Value
7.35M
Filed
Jun 30, 2024
BLACKROCK, INC.
CIK 2012383
Shares
5.23M
Value
4.62M
Filed
Jun 30, 2026
SUMITOMO MITSUI TRUST GROUP, INC.
CIK 1475365
Shares
3.89M
Value
3.44M
Filed
Jun 30, 2026
AMOVA ASSET MANAGEMENT AMERICAS, INC.
CIK 1480751
Shares
3.89M
Value
3.46M
Filed
Jun 30, 2026
MILLENNIUM MANAGEMENT LLC
CIK 1273087
Shares
3.13M
Value
2.77M
Filed
Jun 30, 2026
UBS GROUP AG
CIK 1610520
Shares
2.56M
Value
2.27M
Filed
Jun 30, 2026
JANE STREET GROUP, LLC
CIK 1595888
Shares
2.42M
Value
2.15M
Filed
Jun 30, 2026
GLENVIEW CAPITAL MANAGEMENT, LLC
CIK 1138995
Shares
2.42M
Value
4.32M
Filed
Jun 30, 2023
AQR CAPITAL MANAGEMENT LLC
CIK 1167557
Shares
2.35M
Value
2.08M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
2.24M
Value
1.98M
Filed
Jun 30, 2026
FORESITE CAPITAL MANAGEMENT IV, LLC
CIK 1704132
Shares
1.77M
Value
3.12M
Filed
Mar 31, 2023
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 1446194
Shares
1.54M
Value
1.36M
Filed
Jun 30, 2026
VANGUARD FIDUCIARY TRUST CO
CIK 933478
Shares
1.12M
Value
988.26K
Filed
Jun 30, 2026
JACOBS LEVY EQUITY MANAGEMENT, INC
CIK 884414
Shares
939.42K
Value
828.76K
Filed
Sep 30, 2024
FORESITE CAPITAL MANAGEMENT V, LLC
CIK 1792206
Shares
924.40K
Value
1.65M
Filed
Jun 30, 2023
STATE STREET CORP
CIK 93751
Shares
890.74K
Value
788.31K
Filed
Jun 30, 2026
FOSUN INTERNATIONAL LTD
CIK 1447884
Shares
743.93K
Value
658.38K
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | 102909 | 9.61M | 10.57M | Dec 31, 2025 |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 7.58M | 6.71M | Jun 30, 2026 |
| 3 | ARK INVESTMENT MANAGEMENT LLC | 1697748 | 7.17M | 6.34M | Jun 30, 2026 |
| 4 | BLACKROCK FINANCE, INC. | 1364742 | 7M | 7.35M | Jun 30, 2024 |
| 5 | BLACKROCK, INC. | 2012383 | 5.23M | 4.62M | Jun 30, 2026 |
| 6 | SUMITOMO MITSUI TRUST GROUP, INC. | 1475365 | 3.89M | 3.44M | Jun 30, 2026 |
| 7 | AMOVA ASSET MANAGEMENT AMERICAS, INC. | 1480751 | 3.89M | 3.46M | Jun 30, 2026 |
| 8 | MILLENNIUM MANAGEMENT LLC | 1273087 | 3.13M | 2.77M | Jun 30, 2026 |
| 9 | UBS GROUP AG | 1610520 | 2.56M | 2.27M | Jun 30, 2026 |
| 10 | JANE STREET GROUP, LLC | 1595888 | 2.42M | 2.15M | Jun 30, 2026 |
| 11 | GLENVIEW CAPITAL MANAGEMENT, LLC | 1138995 | 2.42M | 4.32M | Jun 30, 2023 |
| 12 | AQR CAPITAL MANAGEMENT LLC | 1167557 | 2.35M | 2.08M | Jun 30, 2026 |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 2.24M | 1.98M | Jun 30, 2026 |
| 14 | FORESITE CAPITAL MANAGEMENT IV, LLC | 1704132 | 1.77M | 3.12M | Mar 31, 2023 |
| 15 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1446194 | 1.54M | 1.36M | Jun 30, 2026 |
| 16 | VANGUARD FIDUCIARY TRUST CO | 933478 | 1.12M | 988.26K | Jun 30, 2026 |
| 17 | JACOBS LEVY EQUITY MANAGEMENT, INC | 884414 | 939.42K | 828.76K | Sep 30, 2024 |
| 18 | FORESITE CAPITAL MANAGEMENT V, LLC | 1792206 | 924.40K | 1.65M | Jun 30, 2023 |
| 19 | STATE STREET CORP | 93751 | 890.74K | 788.31K | Jun 30, 2026 |
| 20 | FOSUN INTERNATIONAL LTD | 1447884 | 743.93K | 658.38K | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.