What price was used for Gary J. Nabel’s SIGA (SIGA) share disposition to the issuer?

The disposition of 7,235 SIGA common shares by Gary J. Nabel to the issuer was reported at $4.39 per share. This transaction is classified as a disposition to the issuer, distinguishing it from an open-market sale to third-party investors.

SIGA Technologies (SIGA) director reshapes holdings with RSU exercise

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

SIGA Technologies director Gary J. Nabel reported several equity compensation transactions. On June 9, 2026, he exercised 24,116 restricted stock units into the same number of common shares at a stated price of $0.00 per share and then disposed of 7,235 common shares back to the company at $4.39 per share in a transaction classified as a disposition to the issuer. Following these moves, he directly held 80,989 shares of common stock. Nabel also reported a prior grant of 34,169 restricted stock units, which vest on the date of the company’s 2027 annual meeting of stockholders, with footnotes noting that a portion of these RSUs may be cash-settled to address tax obligations.

Insider Trade Summary

24,116 shares exercised/converted

Mixed 4 txns

Insider Nabel Gary J.

Role null

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unites	24,116	$0.00	--
Grant/Award	Restricted Stock Units	34,169	$0.00	--
Exercise	Common Stock, par value $.0001 per share	24,116	$0.00	--
Disposition	Common Stock, par value $.0001 per share	7,235	$4.39	$32K

Holdings After Transaction: Restricted Stock Unites — 0 shares (Direct, null); Restricted Stock Units — 34,169 shares (Direct, null); Common Stock, par value $.0001 per share — 80,989 shares (Direct, null)

Footnotes (1)

Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis. Reflects RSUs that were cash-settled, per the terms of the compensation program for Board Directors and as noted on the Form 4 filed on June 11, 2025. Partial cash-settlement of RSUs under the Board compensation program is designed to address tax obligations in connection with the vesting of RSUs. The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders. RSUs represent contingent rights to receive common stock of the Company on a one-for-one basis, of which up to 10,251 RSUs are expected to settle in cash value thereof but may be settled in shares at the discretion of the Board of Directors. The RSUs fully vest on the date of the Company's 2027 annual meeting of stockholders.

Key Figures

Disposition to issuer: 7,235 shares at $4.39/share RSUs exercised: 24,116 shares RSU grant: 34,169 RSUs +2 more

5 metrics

Disposition to issuer 7,235 shares at $4.39/share Common stock disposition to issuer on June 9, 2026

RSUs exercised 24,116 shares Exercise or conversion of derivative security on June 9, 2026

RSU grant 34,169 RSUs Grant representing contingent rights to common stock

Post-transaction holdings 80,989 shares Common stock directly held after transactions

RSUs expected cash-settled Up to 10,251 RSUs Portion of RSUs expected to settle in cash value

Key Terms

Restricted stock units ("RSUs"), Disposition to issuer, Exercise or conversion of derivative security, annual meeting of stockholders, +1 more

5 terms

Restricted stock units ("RSUs") financial

"Restricted stock units ("RSUs") represent contingent rights to receive common stock"

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

Disposition to issuer financial

"transaction_code_description": "Disposition to issuer""

Exercise or conversion of derivative security financial

"transaction_code_description": "Exercise or conversion of derivative security""

annual meeting of stockholders financial

"fully vested on the date of the Company's 2026 annual meeting of stockholders"

cash-settled financial

"Reflects RSUs that were cash-settled, per the terms of the compensation program"

Cash-settled describes a financial contract that is resolved by paying the monetary difference between agreed and actual prices, instead of delivering the underlying asset. For investors, it matters because it simplifies trades—like settling a bet with cash rather than handing over the item—and affects liquidity, tax treatment, and counterparty exposure, since you receive or pay only the value change rather than owning or transferring the actual security or commodity.

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Form 4 Insider Transactions: What Each Field Means →

06/10/2026 - 09:14 PM

SEC Form 4

FORM 4

UNITED 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^*

Nabel Gary J.

(Last)

(First)

(Middle)

C/O SIGA TECHNOLOGIES, INC.

31 EAST 62ND STREET

(Street)

NEW YORK

10065

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
SIGA TECHNOLOGIES INC [ SIGA ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/09/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock, par value $.0001 per share	06/09/2026		M		24,116	A	⁽¹⁾	80,989	D
Common Stock, par value $.0001 per share	06/09/2026		D⁽²⁾		7,235	D	$4.39	73,754	D

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Unites	⁽¹⁾	06/09/2026		M			24,116	⁽³⁾	⁽³⁾	Common Stock, par value $.0001 per share	24,116	$0	0	D
Restricted Stock Units	⁽⁴⁾	06/09/2026		A		34,169		⁽⁵⁾	⁽⁵⁾	Common Stock, par value $.0001 per share	34,169	$0	34,169	D

Explanation of Responses:

1. Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis.

2. Reflects RSUs that were cash-settled, per the terms of the compensation program for Board Directors and as noted on the Form 4 filed on June 11, 2025. Partial cash-settlement of RSUs under the Board compensation program is designed to address tax obligations in connection with the vesting of RSUs.

3. The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders.

4. RSUs represent contingent rights to receive common stock of the Company on a one-for-one basis, of which up to 10,251 RSUs are expected to settle in cash value thereof but may be settled in shares at the discretion of the Board of Directors.

5. The RSUs fully vest on the date of the Company's 2027 annual meeting of stockholders.

	/s/ Kevin Buckley, as Attorney-in-Fact	06/10/2026
	** Signature of Reporting Person	Date
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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did SIGA (SIGA) director Gary J. Nabel report?

Gary J. Nabel reported exercising 24,116 restricted stock units into common shares and returning 7,235 common shares to SIGA at $4.39 per share. He also disclosed a grant of 34,169 restricted stock units tied to future vesting at a 2027 stockholders’ meeting.

How many SIGA (SIGA) shares does Gary J. Nabel hold after these Form 4 transactions?

After the reported transactions, Gary J. Nabel directly holds 80,989 shares of SIGA common stock. This total reflects his equity position following the RSU exercise, the disposition of 7,235 shares to the issuer, and other changes recorded on June 9, 2026.

What restricted stock unit grants did SIGA (SIGA) disclose for Gary J. Nabel?

SIGA disclosed a grant of 34,169 restricted stock units to Gary J. Nabel. These RSUs fully vest on the date of the company’s 2027 annual meeting of stockholders, and a portion, up to 10,251 units, may be settled in cash at the board’s discretion.

How are Gary J. Nabel’s SIGA (SIGA) restricted stock units expected to settle?

Nabel’s restricted stock units generally represent rights to receive SIGA common stock on a one-for-one basis. Footnotes state up to 10,251 RSUs are expected to settle in cash value, though the board may instead settle them in shares at its discretion.