Cellectar Biosciences, Inc. (CLRB) Insider Trading
Over the last 3 months, CLRB insiders made 4 open-market buys and 0 sales, a net purchase of $200K (SEC Form 4). Multiple insiders bought within days of each other (cluster buying). Over the last 6 months, 2 institutions increased and 3 reduced their position (13F).
Insider Activity
Sentiment
100/100
Buys (3m)
4
Sells (3m)
0
Net (3m)
$200.0K
Insiders buyingCluster buying
Insider trades by month Buys Sells
Mar
Sep
Mar
Jul
Dec
May
Context3-month price -0.7%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| May 11, 2026 | Longcor Jarrodofficer: Chief Operating Officer | Buy | 26,040 | $2.88 |
| May 11, 2026 | CARUSO JAMES Vdirector, officer: Chief Executive Officer | Buy | 8,680 | $2.88 |
| May 11, 2026 | CARUSO JAMES Vdirector, officer: Chief Executive Officer | Buy | 26,040 | $2.88 |
| May 11, 2026 | Longcor Jarrodofficer: Chief Operating Officer | Buy | 8,680 | $2.88 |
| Dec 16, 2025 | NEIS JOHNdirector | Sell | 198 | $3.70 |
| Jul 3, 2025 | CARUSO JAMES Vdirector, officer: Chief Executive Officer | Buy | 10,000 | $4.99 |
| Jul 3, 2025 | Longcor Jarrodofficer: Chief Operating Officer | Buy | 10,000 | $4.99 |
| Jul 3, 2025 | Kolean Chad Jofficer: Chief Financial Officer | Buy | 5,000 | $4.99 |
| Mar 12, 2025 | Longcor Jarrodofficer: Chief Operating Officer | Buy | 30,000 | $0.28 |
| Feb 18, 2025 | Swirsky Douglas Jdirector | Grant | 90,000 | $0.29 |
| Feb 18, 2025 | NEIS JOHNdirector | Grant | 60,000 | $0.29 |
| Feb 18, 2025 | Loren Stefandirector | Grant | 60,000 | $0.29 |
| Feb 18, 2025 | Longcor Jarrodofficer: Chief Operating Officer | Grant | 500,000 | $0.29 |
| Feb 18, 2025 | Kolean Chad Jofficer: Chief Financial Officer | Grant | 290,000 | $0.29 |
| Feb 18, 2025 | DRISCOLL FREDERICK Wdirector | Grant | 60,000 | $0.29 |
| Feb 18, 2025 | Chanan-Khan Asherdirector | Grant | 60,000 | $0.29 |
| Feb 18, 2025 | CARUSO JAMES Vdirector, officer: President and CEO | Grant | 900,000 | $0.29 |
| Jun 18, 2024 | Lea Darrell Shaneofficer: Chief Commercial Officer | Grant | 260,000 | $2.65 |
| Jun 18, 2024 | Loren Stefandirector | Grant | 60,000 | $2.58 |
| Jun 18, 2024 | Swirsky Douglas Jdirector | Grant | 90,000 | $2.58 |
| Jun 18, 2024 | NEIS JOHNdirector | Grant | 60,000 | $2.58 |
| Jun 18, 2024 | DRISCOLL FREDERICK Wdirector | Grant | 60,000 | $2.58 |
| Jun 18, 2024 | Chanan-Khan Asherdirector | Grant | 60,000 | $2.58 |
| Jun 18, 2024 | Shustov Andreiofficer: Senior Vice President, Medical | Grant | 260,000 | $2.65 |
| Jun 18, 2024 | Kolean Chad Jofficer: Chief Financial Officer | Grant | 290,000 | $2.65 |
| Jun 18, 2024 | CARUSO JAMES Vdirector, officer: President and CEO | Grant | 900,000 | $2.65 |
| Jun 18, 2024 | Longcor Jarrodofficer: Chief Operating Officer | Grant | 500,000 | $2.65 |
| Dec 12, 2023 | Longcor Jarrodofficer: Chief Operating Officer | Grant | 144,000 | $1.68 |
| Dec 12, 2023 | Lea Darrell Shaneofficer: Chief Commercial Officer | Grant | 100,000 | $1.68 |
| Dec 12, 2023 | Lea Darrell Shaneofficer: Chief Commercial Officer | Grant | 39,599 | — |
Source: CLRB SEC Form 4 filings, latest May 11, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their CLRB positions over the last 6 months (SEC Form 13F).
Increased
2
New positions
4
Reduced
3
Sold out
4
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BLEICHROEDER LP | Unchanged | 100K | May 14, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 82K | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 53K | May 15, 2026 |
| SEQUOIA FINANCIAL ADVISORS, LLC | Reduced | 19K | Apr 30, 2026 |
| VANGUARD FIDUCIARY TRUST CO | New Position | 17K | May 8, 2026 |
| WARBERG ASSET MANAGEMENT LLC | Unchanged | 14K | May 7, 2026 |
| RIVERVIEW CAPITAL ADVISERS, LLC | Unchanged | 10K | May 14, 2026 |
| UBS GROUP AG | Increased | 10K | May 5, 2026 |
| BLACKROCK, INC. | Unchanged | 5K | May 13, 2026 |
| TOWER RESEARCH CAPITAL LLC (TRC) | Reduced | 793 | May 15, 2026 |
| VANGUARD GLOBAL ADVISERS, LLC | New Position | 563 | May 8, 2026 |
| MORGAN STANLEY | Unchanged | 510 | May 15, 2026 |
| TD WATERHOUSE CANADA INC. | Unchanged | 63 | May 12, 2026 |
| SBI SECURITIES CO., LTD. | Unchanged | 11 | Apr 28, 2026 |
| FMR LLC | New Position | 10 | May 15, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.