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Tonix (NASDAQ: TNXP) CEO Lederman acquires 5,000 shares in open-market buy

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

Rhea-AI Filing Summary

Tonix Pharmaceuticals Holding Corp. Chief Executive Officer Seth Lederman reported an open-market purchase of common stock. On June 9, 2026, he bought 5,000 shares at a weighted average price of $11.79 per share in a series of trades priced between $11.735 and $11.883.

Following this purchase, Lederman directly owns 9,005 common shares. He also has indirect ownership of 1 share through Lederman & Co. and 20,001 shares through an IRA account, where he may be deemed a control person of the Lederman & Co. entity.

Positive

  • None.

Negative

  • None.
Insider LEDERMAN SETH
Role Chief Executive Officer
Bought 5,000 shs ($59K)
Type Security Shares Price Value
Purchase Common Stock, $0.001 par value 5,000 $11.79 $59K
holding Common Stock, $0.001 par value -- -- --
holding Common Stock, $0.001 par value -- -- --
Holdings After Transaction: Common Stock, $0.001 par value — 9,005 shares (Direct, null); Common Stock, $0.001 par value — 20,001 shares (Indirect, By IRA Account)
Footnotes (1)
  1. Represents the weighted average purchase price of shares purchased in a series of open market transactions on the transaction date at prices ranging from $11.735 to $11.883 per share. The Reporting Person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased at each price. Reporting Person may be deemed a control person of this entity.
Shares purchased 5,000 shares Open-market buy on June 9, 2026
Weighted average price $11.79 per share Open-market purchase price
Trade price range $11.735–$11.883 per share Series of trades on transaction date
Direct holdings after transaction 9,005 shares Common stock held directly by CEO
Indirect IRA holdings 20,001 shares Common stock held through IRA account
Indirect Lederman & Co. holding 1 share Held via Lederman & Co. entity
open market transaction financial
"Represents the weighted average purchase price of shares purchased in a series of open market transactions"
An open market transaction is a buy or sell of publicly traded securities executed on an exchange or other public trading venue where many buyers and sellers can participate. It matters to investors because these trades change the visible supply and demand for a stock—like shoppers moving prices in a busy marketplace—affecting share price, liquidity (how easily you can trade), and sometimes the balance of ownership.
weighted average purchase price financial
"Represents the weighted average purchase price of shares purchased in a series of open market transactions"
The weighted average purchase price is the average cost per share you paid across multiple buys, calculated so larger purchases count more than smaller ones. Imagine buying apples at different prices: the overall price you effectively paid depends on how many apples you bought at each price. Investors use it to measure true cost basis, calculate gains or losses, decide when to sell, and manage taxes and portfolio performance.
indirect ownership financial
"direct_or_indirect": "I", "nature_of_ownership": "Lederman & Co.""
IRA Account financial
""nature_of_ownership": "By IRA Account""
control person financial
"Reporting Person may be deemed a control person of this entity"
A control person is an individual or entity that can significantly influence a company’s decisions and direction through ownership, voting power, or contractual rights—think of them as the captain who can steer the ship. Investors care because a control person’s choices affect corporate strategy, board appointments, and transactions that can raise or lower a stock’s value, and they often carry additional legal responsibilities and disclosure requirements to protect other shareholders.
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Learn about SEC filing dates
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*
LEDERMAN SETH

(Last)(First)(Middle)
C/O TONIX PHARMACEUTICALS HOLDING CORP.
200 CONNELL DRIVE, SUITE 3100

(Street)
BERKELEY HEIGHTS NEW JERSEY 07922

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Tonix Pharmaceuticals Holding Corp. [ TNXP ]
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)
06/09/2026
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 Stock, $0.001 par value06/09/2026P5,000A$11.79(1)9,005D
Common Stock, $0.001 par value20,001IBy IRA Account(2)
Common Stock, $0.001 par value1ILederman & Co.(2)
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
Explanation of Responses:
1. Represents the weighted average purchase price of shares purchased in a series of open market transactions on the transaction date at prices ranging from $11.735 to $11.883 per share. The Reporting Person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased at each price.
2. Reporting Person may be deemed a control person of this entity.
/s/ Seth Lederman06/09/2026
** 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 Tonix Pharmaceuticals (TNXP) report for Seth Lederman?

Tonix Pharmaceuticals reported that CEO Seth Lederman bought 5,000 shares of common stock in the open market. The shares were acquired on June 9, 2026 at a weighted average price of $11.79 per share across multiple trades.

At what price did the TNXP CEO purchase shares in this Form 4 filing?

The CEO purchased 5,000 Tonix Pharmaceuticals shares at a weighted average price of $11.79. Individual trades occurred in a price range from $11.735 to $11.883 per share, reflecting a series of open-market transactions on the same day.

How many Tonix Pharmaceuticals (TNXP) shares does Seth Lederman now hold directly?

After the reported transaction, Seth Lederman holds 9,005 Tonix Pharmaceuticals common shares directly. This figure reflects his total direct ownership following the 5,000-share open-market purchase disclosed in the Form 4 filing for June 9, 2026.

What indirect Tonix Pharmaceuticals holdings are associated with Seth Lederman?

The filing shows 1 Tonix share held indirectly through Lederman & Co. and 20,001 shares held indirectly through an IRA account. The reporting person may be deemed a control person of the Lederman & Co. entity, according to the disclosed footnote.

Was the Tonix Pharmaceuticals (TNXP) insider transaction an open-market buy or sale?

The reported Tonix Pharmaceuticals insider transaction was an open-market purchase, not a sale. CEO Seth Lederman acquired 5,000 common shares under transaction code P, which denotes an open-market or private purchase, increasing his direct share ownership.