STOCK TITAN

Cellectar (CLRB) CEO reports open-market stock and warrant buys

Filing Impact
(Neutral)
Filing Sentiment
(Positive)
Form Type
4

Rhea-AI Filing Summary

Cellectar Biosciences, Inc. director and Chief Executive Officer James V Caruso reported buying common stock and warrants in an open-market transaction. He purchased 8,680 shares of common stock at $2.88 per share and 26,040 warrants at $0.01 per warrant, each relating to common stock at a $2.88 exercise price. Following these transactions, he directly holds 20,318 shares of common stock and 36,076 warrants. A footnote explains that the warrants are divided into tranches with terms of one, two, and five years from the date of stockholder approval.

Positive

  • None.

Negative

  • None.
Insider CARUSO JAMES V
Role Chief Executive Officer
Bought 34,720 shs ($25K)
Type Security Shares Price Value
Purchase Warrants 26,040 $0.01 $260.40
Purchase Common Stock 8,680 $2.88 $25K
Holdings After Transaction: Warrants — 36,076 shares (Direct, null); Common Stock — 20,318 shares (Direct, null)
Footnotes (1)
  1. [object Object]
Common shares purchased 8,680 shares Open-market purchase at $2.88 per share on 2026-05-07
Warrants purchased 26,040 warrants Open-market purchase at $0.01 per warrant on 2026-05-07
Common share purchase price $2.88 per share Price paid for common stock on 2026-05-07
Warrant exercise price $2.88 per share Exercise price for underlying common stock
Common shares after transaction 20,318 shares Direct common stock holdings following reported trades
Warrants after transaction 36,076 warrants Direct warrant holdings following reported trades
Net shares bought 34,720 units Combined common stock and warrants bought; net-buy direction
open-market purchase financial
"transaction_action: "open-market purchase" for both common stock and warrants"
An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.
Warrants financial
"security_title: "Warrants" with underlying security title "Common Stock""
Warrants are special documents that give you the right to buy a company's stock at a set price before a certain date. They are often used as a way for companies to attract investors or raise money, and their value can increase if the company's stock price goes up.
underlying security financial
"underlying_security_title: "Common Stock" and underlying_security_shares: "26040.0000""
exercise price financial
"conversion_or_exercise_price: "2.8800" for the warrant transaction"
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
tranche financial
"Tranche A shall have a one-year term from the date of stockholder approval"
A tranche is one slice of a larger financing or investment that is released, sold, or paid out in separate parts rather than all at once. Investors care because each slice can carry different risk, return and timing—like buying pieces of a cake where some slices are richer or come later—so the specific tranche you hold affects when you get paid and how much you might gain or lose.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
CARUSO JAMES V

(Last)(First)(Middle)
C/O CELLECTAR BIOSCIENCES, INC.
100 CAMPUS DRIVE

(Street)
FLORHAM PARK NEW JERSEY 07932

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Cellectar Biosciences, Inc. [ CLRB ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
Chief Executive Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/07/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock05/07/2026P8,680A$2.8820,318D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Warrants$2.8805/07/2026P26,04005/07/2026 (1)Common Stock26,040$0.0136,076D
Explanation of Responses:
1. Expiration dates are as follows: Tranche A shall have a one-year term from the date of stockholder approval; Tranche B shall have a two-year term from the date of stockholder approval; Tranche C shall have a five-year term from the date of stockholder approval.
/s/ Christina Blakley, attorney-in-fact for James V. Caruso05/11/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Cellectar Biosciences (CLRB) report for its CEO?

Cellectar Biosciences reported that CEO and director James V Caruso made open-market purchases of common stock and warrants. He bought 8,680 common shares and 26,040 warrants on the same date, increasing his direct holdings in both securities.

How many Cellectar Biosciences (CLRB) shares did James V Caruso buy?

James V Caruso bought 8,680 shares of Cellectar Biosciences common stock in an open-market purchase at $2.88 per share. After this trade, his direct common stock holdings increased to 20,318 shares, according to the reported post-transaction balance.

What warrants did the Cellectar Biosciences (CLRB) CEO purchase and at what prices?

The CEO purchased 26,040 Cellectar Biosciences warrants at $0.01 per warrant. Each warrant relates to 26,040 underlying common shares with an exercise price of $2.88 per share, providing additional potential equity exposure if the warrants are exercised.

What are James V Caruso’s holdings after the CLRB insider transactions?

Following the reported transactions, James V Caruso directly holds 20,318 shares of Cellectar Biosciences common stock and 36,076 warrants. These figures combine his prior position with the newly purchased 8,680 shares and 26,040 warrants disclosed in the Form 4.

How many total shares did the Cellectar Biosciences (CLRB) CEO buy in this Form 4?

Across both securities, the CEO purchased 34,720 units: 8,680 common shares and 26,040 warrants. The filing classifies both as open-market purchases, resulting in a net-buy transaction summary with no reported sales or dispositions on that date.

What do the warrant expiration terms mean in the Cellectar Biosciences (CLRB) filing?

A footnote explains the warrants are split into Tranche A, B, and C with one-year, two-year, and five-year terms, respectively, from the date of stockholder approval. This staggered structure defines how long each tranche can be exercised into common shares.