CELLECTAR BIOSCIENCES INC CLRB
COM NEW · Common Stock · CUSIP 15117F880
- SectorHealth care
- IndustryPharmaceutical Preparations
- HeadquartersFlorham Park, NJ
- 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. Holder counts are more reliable. Shares outstanding: 9.5m as of 2026-08-11, 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 ≈ $2.79.
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q2 2025 | 20 |
| Q3 2025 | 21 |
| Q4 2025 | 20 |
| Q1 2026 | 19 |
| Q2 2026 | 29 |
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 2025 | 13 | 7 |
| Q4 2025 | 11 | 6 |
| Q1 2026 | 3 | 7 |
| Q2 2026 | 19 | 6 |
Biggest buyers
| Caligan Partners LP | New | +470.0k |
| Nantahala Capital Management, LLC | New | +440.0k |
| STEMPOINT CAPITAL LP | New | +354.9k |
| SILVERARC CAPITAL MANAGEMENT, LLC | New | +321.7k |
| VANGUARD CAPITAL MANAGEMENT LLC | Added | +245.5k |
| Balyasny Asset Management L.P. | New | +220.0k |
| Empery Asset Management, LP | New | +189.6k |
| Bleichroeder LP | Added | +188.7k |
| DIADEMA PARTNERS LP | New | +138.3k |
| Stonepine Capital Management, LLC | New | +104.5k |
Biggest sellers
| Warberg Asset Management LLC | Sold out | -13.9k |
| UBS Group AG | Reduced | -6.6k |
| Tower Research Capital LLC (TRC) | Sold out | -793 |
| Vanguard Global Advisers, LLC | Sold out | -563 |
| FMR LLC | Sold out | -10 |
| BlackRock, Inc. | Reduced | -10 |
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 |
|---|---|
| BALYASNY ASSET MANAGEMENT L.P. 13G · institution new · filed 2026-08-14 | 10.0% |
| SILVERARC CAPITAL MANAGEMENT, LLC 13G · institution new · filed 2026-08-14 | 10.0% |
| Bleichroeder LP 13G · institution +5.4 pts · filed 2026-08-13 | 10.0% |
| Empery Asset Management, LP 13G · institution new · filed 2026-08-04 | 10.0% |
| JANUS HENDERSON GROUP PLC 13G · institution new · filed 2026-06-05 | 10.0% |
| STEMPOINT CAPITAL LP 13G · institution new · filed 2026-08-14 | 9.9% |
| Stonepine Capital Management, LLC 13G · passive investor new · filed 2026-05-11 | 9.9% |
| Caligan Partners LP 13G · institution new · filed 2026-08-14 | 5.9% |
Fell to 5% or below in the last year: Hexstone Capital LLC (4.9%, 2026-02-04)
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 | 0 | — | 0 | — | — |
| Q1 2025 | 1 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 3 | $74.8k | 0 | — | — |
| Q4 2025 | 0 | — | 1 | $733 | — |
| Q1 2026 | 0 | — | 0 | — | — |
| Q2 2026 | 2 | $25.0k | 0 | — | — |
| Q3 2026 | 0 | — | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-05-07 | CARUSO JAMES V Chief Executive Officer, director | Bought | $25.0k8.7k shares |
| 2026-05-07 | Longcor Jarrod Chief Operating Officer | Bought | $25.0k8.7k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| Caligan Partners LP 0.06% of their portfolio | 470.0k $1.3m | New |
| Nantahala Capital Management, LLC 0.04% of their portfolio | 440.0k $1.2m | New |
| STEMPOINT CAPITAL LP 0.17% of their portfolio | 354.9k $986.7k | New |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 327.4k $910.1k | Added +245.5k |
| SILVERARC CAPITAL MANAGEMENT, LLC 0.10% of their portfolio | 321.7k $894.4k | New |
| Bleichroeder LP 0.14% of their portfolio | 288.7k $802.5k | Added +188.7k |
| Jupiter Topco LLC 0.00% of their portfolio | 274.2k $759.4k | First filing |
| Balyasny Asset Management L.P. 0.00% of their portfolio | 220.0k $611.6k | New |
| Empery Asset Management, LP 0.61% of their portfolio | 189.6k $527.1k | New |
| DIADEMA PARTNERS LP 0.14% of their portfolio | 138.3k $384.6k | New |
| Stonepine Capital Management, LLC 0.22% of their portfolio | 104.5k $290.6k | New |
| Persistent Asset Partners Ltd 0.08% of their portfolio | 93.0k $258.5k | New |
| BOOTHBAY FUND MANAGEMENT, LLC 0.00% of their portfolio | 85.1k $236.5k | New |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 53.4k $148.3k | Added +573 |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 46.2k $128.5k | Added +29.6k |
| Sequoia Financial Advisors, LLC 0.00% of their portfolio | 21.9k $60.7k | Added +3.0k |
| ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio | 16.6k $46.0k | New |
| NORTHERN TRUST CORP 0.00% of their portfolio | 14.8k $41.3k | New |
| Riverview Capital Advisers, LLC 0.01% of their portfolio | 10.4k $50.1k | Unchanged |
| BlackRock, Inc. 0.00% of their portfolio | 4.7k $13.2k | Reduced -10 |
| UBS Group AG 0.00% of their portfolio | 3.1k $8.6k | Reduced -6.6k |
| BARCLAYS PLC 0.00% of their portfolio | 561 $1.6k | New |
| MORGAN STANLEY 0.00% of their portfolio | 510 $1.4k | Unchanged |
| TD Waterhouse Canada Inc. 0.00% of their portfolio | 63 $178 | Unchanged |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 11 $31 | Unchanged |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 7 $18 | Added +6 |
| US BANCORP \DE\ 0.00% of their portfolio | 3 $8 | Unchanged |
| JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio | 3 $8 | Unchanged |
| DANSKE BANK A/S 0.00% of their portfolio | 2 $6 | Unchanged |