SIGA Technologies (SIGA) director exercises RSUs and returns 7,235 shares

Rhea-AI Filing Summary

SIGA Technologies director John M. Keane reported several equity compensation-related transactions. On June 9, 2026, he exercised 24,116 restricted stock units into common stock at a stated price of $0.00 per share and then returned 7,235 common shares to the issuer at $4.39 per share in a disposition to the company.

He also received a new award of 34,169 restricted stock units, which represent contingent rights to receive SIGA common stock on a one-for-one basis, with a portion eligible for cash settlement at the Board’s discretion. Following these transactions, Keane directly holds 16,881 common shares and maintains a new RSU position scheduled to fully vest at the Company’s 2027 annual meeting of stockholders.

Insights

Equity compensation analyst

Routine director equity compensation with option exercise and modest share return.

Director John M. Keane exercised 24,116 restricted stock units into SIGA common stock and simultaneously received a new grant of 34,169 RSUs, tied to future service through the 2027 annual meeting of stockholders.

The 7,235-share disposition to the issuer at $4.39 per share reflects a return of shares to the company rather than an open-market sale. With 16,881 common shares held directly after these moves and no remaining derivative positions in this filing, the activity appears consistent with normal board compensation mechanics.

Footnotes indicate that some RSUs are designed for partial cash settlement to address tax obligations, and that settlement method remains at the Board’s discretion. Overall impact on shareholders is limited and primarily reflects ongoing compensation and share accounting rather than a directional bet by the director.

Insider Trade Summary

24,116 shares exercised/converted

Mixed 4 txns

Insider KEANE JOHN M

Role null

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	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 Units — 0 shares (Direct, null); Common Stock, par value $.0001 per share — 24,116 shares (Direct, null)

Footnotes (1)

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

Shares disposed to issuer: 7,235 shares Disposition price: $4.39 per share RSUs exercised: 24,116 units +3 more

6 metrics

Shares disposed to issuer 7,235 shares Disposition to issuer at $4.39/share on June 9, 2026

Disposition price $4.39 per share Price for 7,235-share disposition to SIGA Technologies

RSUs exercised 24,116 units Restricted stock units converted into common stock on June 9, 2026

New RSU grant 34,169 units Restricted stock units awarded with vesting at 2027 annual meeting

Common shares held after 16,881 shares Direct holdings following transactions on June 9, 2026

RSUs expected cash-settle Up to 10,251 units Portion of RSUs may settle in cash at Board discretion

Key Terms

Restricted Stock Units, Disposition to issuer, derivative security, cash-settled, +1 more

5 terms

Restricted Stock Units financial

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

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Disposition to issuer financial

"transaction_code_description": "Disposition to issuer""

derivative security financial

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

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

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.

contingent rights financial

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Form 4 Insider Transactions: What Each Field Means →

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^*

KEANE JOHN M

(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)	24,116	D
Common Stock, par value $.0001 per share	06/09/2026		D(2)		7,235	D	$4.39	16,881	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.
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 transactions did SIGA (SIGA) director John M. Keane report?

Director John M. Keane exercised 24,116 restricted stock units into SIGA common stock and returned 7,235 common shares to the issuer at $4.39 per share, while also receiving a new grant of 34,169 RSUs linked to future vesting.

How many SIGA (SIGA) shares does John M. Keane hold after these transactions?

After the reported transactions, John M. Keane directly holds 16,881 shares of SIGA common stock. This position reflects his equity stake following the RSU exercise and the disposition of 7,235 shares back to the company at a fixed price.

What restricted stock unit awards did SIGA (SIGA) grant to John M. Keane?

SIGA granted John M. Keane 34,169 restricted stock units, each representing a contingent right to one SIGA common share. Footnotes note that up to 10,251 RSUs may be cash-settled, with the Board retaining discretion on settling in cash or shares.

When do John M. Keane’s new SIGA (SIGA) RSUs vest?

The new restricted stock units granted to John M. Keane fully vest on the date of SIGA Technologies’ 2027 annual meeting of stockholders. Vesting is tied to continued board service through that meeting, consistent with typical director compensation structures.

Was John M. Keane’s SIGA (SIGA) share disposition an open-market sale?

No. The 7,235-share transaction was coded as a disposition to the issuer at $4.39 per share. This indicates shares were returned directly to SIGA Technologies, not sold in the open market to third-party investors on an exchange.

How are SIGA (SIGA) RSUs for John M. Keane expected to settle?

Keane’s RSUs generally represent rights to receive SIGA common stock one-for-one. However, up to 10,251 RSUs are expected to settle in cash value, although the Board of Directors may instead choose share settlement at its discretion under the compensation program.