SIGA director reports RSU grant and share moves

SIGA Technologies director Holly L. Phillips reported several equity compensation transactions in company stock.

Rhea-AI Filing Summary

SIGA Technologies director Holly L. Phillips reported several equity compensation transactions in company stock. On June 9, 2026, she disposed of 7,235 shares of common stock back to the issuer at $4.39 per share and exercised derivative securities to acquire 24,116 common shares at a $0.00 exercise price. She also received a grant of 34,169 restricted stock units (RSUs) and exercised 24,116 RSUs into common stock, with the RSUs representing contingent rights to receive SIGA common shares on a one-for-one basis.

Insider Trade Summary

24,116 shares exercised/converted

Exercise 4 txns

Insider Phillips Holly L.

Role Director

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

Holdings After Transaction: Restricted Stock Units — 34,169 contracts (Direct); Common Stock, par value $.0001 per share — 73,754 shares (Direct)

Footnotes (5)

1. F1. Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis.
2. F2. 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. F3. The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders.
4. F4. 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. F5. 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 Derivative exercise into common: 24,116 shares at $0.00 exercise price RSU grant: 34,169 RSUs +2 more

5 metrics

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

Derivative exercise into common 24,116 shares at $0.00 exercise price Exercise or conversion of derivative security on June 9, 2026

RSU grant 34,169 RSUs Grant of restricted stock units on June 9, 2026

RSU exercise into common 24,116 RSUs RSUs exercised into common stock on June 9, 2026

RSU-to-share ratio 1 RSU : 1 share RSUs represent one-for-one rights to SIGA common stock

Key Terms

Restricted stock units ("RSUs"), Disposition to issuer, Exercise or conversion of derivative security, contingent rights to receive common stock, +1 more

5 terms

Restricted stock units ("RSUs") financial

"Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc."

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""

contingent rights to receive common stock financial

"RSUs represent contingent rights to receive common stock of the Company on a one-for-one basis"

cash-settled financial

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

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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did SIGA (SIGA) director Holly L. Phillips report?

Director Holly L. Phillips reported mixed transactions, including a disposition to SIGA and equity awards. She disposed of 7,235 common shares to the issuer, exercised 24,116 derivative-linked shares into common stock, and received a grant of 34,169 restricted stock units on June 9, 2026.

How many SIGA shares did Holly L. Phillips dispose of in this Form 4 filing?

Holly L. Phillips reported a disposition of 7,235 SIGA common shares back to the issuer. The disposition occurred at a price of $4.39 per share and was coded as a "Disposition to issuer," indicating the shares were returned to SIGA Technologies rather than sold on the open market.

What equity awards did SIGA grant to director Holly L. Phillips in this filing?

SIGA granted Holly L. Phillips 34,169 restricted stock units (RSUs) in this Form 4. Each RSU represents a contingent right to receive one share of SIGA common stock, with some RSUs potentially settling in cash at the Board of Directors’ discretion under the compensation program.

Did Holly L. Phillips exercise any SIGA restricted stock units or derivatives?

Yes. She exercised derivative securities tied to 24,116 SIGA common shares at a $0.00 exercise price. She also exercised 24,116 restricted stock units into common stock, converting previously granted RSUs into actual equity, consistent with the Form 4’s "Exercise or conversion of derivative security" code.

How do the RSUs in this SIGA Form 4 work for Holly L. Phillips?

The RSUs give Holly L. Phillips contingent rights to receive SIGA common stock on a one-for-one basis. Footnotes explain some RSUs may be cash-settled under the Board compensation program, which helps address tax obligations when the RSUs vest, with settlement method at the Board’s discretion.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/10/2026 - 09:26 PM Learn about SEC filing dates

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^*

Phillips Holly L.

(Last) (First) (Middle)

C/O SIGA TECHNOLOGIES, INC.

31 EAST 62ND STREET

(Street)

NEW YORK 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)
			Code	V	Amount	(A) or (D)	Price
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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(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.
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* Form 4: SEC 1474 (03-26)