Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in CLRB held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Bleichroeder LP | 100K | $254K | 0.0% | 3.133% | 0.04% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 82K | $208K | — | 2.565% | 0.00% |
| 3 | GEODE CAPITAL MANAGEMENT, LLC | 53K | $134K | +84.3% | 1.653% | 0.00% |
| 4 | Riverview Capital Advisers, LLC | 10K | $50K | 0.0% | 0.325% | 0.02% |
| 5 | Sequoia Financial Advisors, LLC | 19K | $48K | -25.6% | 0.590% | 0.00% |
| 6 | VANGUARD FIDUCIARY TRUST CO | 17K | $42K | — | 0.519% | 0.00% |
| 7 | Warberg Asset Management LLC | 14K | $35K | 0.0% | 0.436% | 0.01% |
| 8 | UBS Group AG | 10K | $25K | +271.3% | 0.302% | 0.00% |
| 9 | BlackRock, Inc. | 5K | $12K | 0.0% | 0.149% | 0.00% |
| 10 | Tower Research Capital LLC (TRC) | 793 | $2K | -56.7% | 0.025% | 0.00% |
| 11 | Vanguard Global Advisers, LLC | 563 | $1K | — | 0.018% | 0.00% |
| 12 | MORGAN STANLEY | 510 | $1K | 0.0% | 0.016% | 0.00% |
| 13 | TD Waterhouse Canada Inc. | 63 | $154 | 0.0% | 0.002% | 0.00% |
| 14 | SBI Securities Co., Ltd. | 11 | $28 | 0.0% | 0.000% | 0.00% |
| 15 | FMR LLC | 10 | $25 | — | 0.000% | 0.00% |
| 16 | JONES FINANCIAL COMPANIES LLLP | 3 | $8 | 0.0% | 0.000% | 0.00% |
| 17 | US BANCORP \DE\ | 3 | $8 | 0.0% | 0.000% | 0.00% |
| 18 | DANSKE BANK A/S | 2 | $5 | 0.0% | 0.000% | 0.00% |
| 19 | ADVISOR GROUP HOLDINGS, INC. | 1 | $2 | -85.7% | 0.000% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in CLRB — a direct measure of their conviction.
Filings activity in CLRB during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new CLRB position in Q1 2026
Institutions that fully closed their CLRB position in Q1 2026
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 19 | +0.0% | 11.42% | 1.35 pp | $1M | 11% |
| Q4 2025 | 19 | 5.0% | 12.77% | 8.76 pp | $1M | 41% |
| Q3 2025 | 20 | +11% | 21.53% | +12.48 pp | $2M | +138% |
| Q2 2025 | 18 | +1700% | 9.05% | +8.29 pp | $1M | +1093% |
| Q2 2024 | 1 | 98% | 0.76% | 199.23 pp | $0M | 100% |
| Q2 2021 | 44 | 2.2% | 199.99% | +0.00 pp | $245M | +504% |
| Q1 2021 | 45 | +13% | 199.99% | +0.00 pp | $41M | +9.9% |
| Q4 2020 | 40 | — | 199.99% | — | $37M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Latest Form 4 transactions by company officers and directors. Insider buys are widely viewed as the highest-conviction signal because executives are risking personal capital.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| May 7, 2026 | CARUSO JAMES V | Buy | 9K | $2.88 | $25K |
| May 7, 2026 | Longcor Jarrod | Buy | 9K | $2.88 | $25K |
Quick answers to the most common questions about buying CLRB stock.
Based on Q1 2026 13F filings, institutional ownership of Cellectar Biosciences, Inc. stands at 11.4%, held across 19 reporting institutions.
Bleichroeder LP is the largest reported institutional holder of CLRB, with approximately 100,000 shares worth $0.00B as of Q1 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of CLRB.
Our composite Smart Money Score for CLRB is 27 out of 100 (Bearish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
4 institutions opened new positions in CLRB during Q1 2026, while 4 fully exited. 2 added to existing positions and 12 trimmed.
CLRB institutional ownership fell by 1.35 percentage points quarter-over-quarter, with a net change of +0 holders.
The top 10 institutions account for 99.6% of all reported 13F value in CLRB, and the top 25 account for 100.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Cellectar Biosciences, Inc. (CLRB) Institutional Ownership