Luckshire Daniel J

SEC source: 0001193125-26-110801 · ownership.xml · derivative · entry 4

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,228

Underlying: Common Stock, par value $.0001 per share · 55,228 shares

Expires not disclosed

F3 · derivative.exercise_price: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.exercise_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.expiration_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

SEC source: 0001193125-26-110801 · ownership.xml · derivative · entry 3

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,008

Underlying: Common Stock, par value $.0001 per share · 11,503 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.exercise_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.expiration_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

SEC source: 0001193125-26-110801 · ownership.xml · nonDerivative · entry 2

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 280,493

F2 · shares: Represents the withholding by the Issuer of shares of Common Stock (based on $5.26 per share, the closing stock price on March 13, 2026) to satisfy tax withholding obligations associated with the vesting of RSUs and the consequent issuance of Common Stock.

SEC source: 0001193125-26-110801 · ownership.xml · nonDerivative · entry 1

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 286,567

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Represents the acquisition of Common Stock from the vesting of one-third of the restricted stock units ("RSUs") granted on March 13, 2025.

SEC source: 0000950170-25-093472 · ownership.xml · derivative · entry 3

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.0001 per share · 24,193 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs were granted on May 11, 2023 and vested over two years, with the first 1/2 of such RSUs vesting on July 1, 2024 and the remaining 1/2 of such RSUs vesting on July 1, 2025.

F2 · derivative.exercise_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs were granted on May 11, 2023 and vested over two years, with the first 1/2 of such RSUs vesting on July 1, 2024 and the remaining 1/2 of such RSUs vesting on July 1, 2025.

F2 · derivative.expiration_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs were granted on May 11, 2023 and vested over two years, with the first 1/2 of such RSUs vesting on July 1, 2024 and the remaining 1/2 of such RSUs vesting on July 1, 2025.

SEC source: 0000950170-25-093472 · ownership.xml · nonDerivative · entry 2

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 275,064

F1 · shares: Represents the withholding by SIGA Technologies, Inc. of shares of Common Stock (based on $6.49 per share, the closing stock price on July 1, 2025) to satisfy tax withholding obligations associated with the vesting of restricted stock units ("RSUs") and the consequent issuance of Common Stock.

SEC source: 0000950170-25-093472 · ownership.xml · nonDerivative · entry 1

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 287,410

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000950170-25-039559 · ownership.xml · derivative · entry 1

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,511

Underlying: Common Stock, par value $.0001 per share · 34,511 shares

Expires not disclosed

F1 · derivative.exercise_price: Restricted stock units ("RSUs") represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F1 · derivative.exercise_date: Restricted stock units ("RSUs") represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F1 · derivative.expiration_date: Restricted stock units ("RSUs") represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

SEC source: 0000950170-24-081630 · ownership.xml · derivative · entry 3

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,193

Underlying: Common Stock, par value $.0001 per share · 24,194 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs were granted on May 11, 2023 and vest over two years, with the first 1/2 of such RSUs vesting on July 1, 2024 and the remaining 1/2 of such RSUs vesting on July 1, 2025.

F2 · derivative.exercise_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs were granted on May 11, 2023 and vest over two years, with the first 1/2 of such RSUs vesting on July 1, 2024 and the remaining 1/2 of such RSUs vesting on July 1, 2025.

F2 · derivative.expiration_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs were granted on May 11, 2023 and vest over two years, with the first 1/2 of such RSUs vesting on July 1, 2024 and the remaining 1/2 of such RSUs vesting on July 1, 2025.

SEC source: 0000950170-24-081630 · ownership.xml · nonDerivative · entry 2

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 263,217

F1 · shares: Represents the withholding by SIGA Technologies, Inc. of shares of Common Stock (based on $7.55 per share, the closing stock price on July 1, 2024) to satisfy tax withholding obligations associated with the vesting of restricted stock units ("RSUs") and the consequent issuance of Common Stock.

SEC source: 0000950170-24-081630 · ownership.xml · nonDerivative · entry 1

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 275,564

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-23-029227 · doc4.xml · derivative · entry 1

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,387

Underlying: Common Stock, Par Value $.0001 Per Share · 48,387 shares

Expires not disclosed

F1 · derivative.exercise_price: Restricted stock units ("RSUs") represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs were granted on May 11, 2023 and will vest over two years, with the first 1/2 of such RSUs vesting on July 1, 2024 and the remaining 1/2 of such RSUs vesting on July 1, 2025.

F1 · derivative.exercise_date: Restricted stock units ("RSUs") represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs were granted on May 11, 2023 and will vest over two years, with the first 1/2 of such RSUs vesting on July 1, 2024 and the remaining 1/2 of such RSUs vesting on July 1, 2025.

F1 · derivative.expiration_date: Restricted stock units ("RSUs") represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs were granted on May 11, 2023 and will vest over two years, with the first 1/2 of such RSUs vesting on July 1, 2024 and the remaining 1/2 of such RSUs vesting on July 1, 2025.

SEC source: 0001209191-21-049275 · doc4.xml · derivative · entry 3

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, Par Value $.0001 Per Share · 26,667 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs were granted on July 31, 2019 and vested over two years, with the first 1/2 of such RSUs vesting on July 31, 2020 and the remaining 1/2 of such RSUs vesting on July 31, 2021.

F2 · derivative.exercise_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs were granted on July 31, 2019 and vested over two years, with the first 1/2 of such RSUs vesting on July 31, 2020 and the remaining 1/2 of such RSUs vesting on July 31, 2021.

F2 · derivative.expiration_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs were granted on July 31, 2019 and vested over two years, with the first 1/2 of such RSUs vesting on July 31, 2020 and the remaining 1/2 of such RSUs vesting on July 31, 2021.

SEC source: 0001209191-21-049275 · doc4.xml · nonDerivative · entry 2

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 251,370

F1 · shares: Represents the withholding by SIGA Technologies, Inc. of shares of Common Stock (based on $6.37 per share, the closing stock price on July 30, 2021) to satisfy tax withholding obligations associated with the vesting of restricted stock units ("RSUs") and the consequent issuance of Common Stock.

SEC source: 0001209191-21-049275 · doc4.xml · nonDerivative · entry 1

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 265,272

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001140361-20-017491 · form4.xml · derivative · entry 3

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,667

Underlying: Common Stock, par value $.0001 per share · 26,667 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Represents vesting of certain RSUs granted on July 31, 2019 and the consequent issuance of Common Stock of the Issuer to the Reporting Person. The RSUs vest over two years, with the first 1/2 of such RSUs vesting on July 31, 2020 and the remaining 1/2 of such RSUs vesting on July 31, 2021. The shares of Common Stock reported in this Form 4 were issued in respect of the RSUs that vested on July 31, 2020. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

F2 · derivative.exercise_date: Represents vesting of certain RSUs granted on July 31, 2019 and the consequent issuance of Common Stock of the Issuer to the Reporting Person. The RSUs vest over two years, with the first 1/2 of such RSUs vesting on July 31, 2020 and the remaining 1/2 of such RSUs vesting on July 31, 2021. The shares of Common Stock reported in this Form 4 were issued in respect of the RSUs that vested on July 31, 2020. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

F2 · derivative.expiration_date: Represents vesting of certain RSUs granted on July 31, 2019 and the consequent issuance of Common Stock of the Issuer to the Reporting Person. The RSUs vest over two years, with the first 1/2 of such RSUs vesting on July 31, 2020 and the remaining 1/2 of such RSUs vesting on July 31, 2021. The shares of Common Stock reported in this Form 4 were issued in respect of the RSUs that vested on July 31, 2020. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

SEC source: 0001140361-20-017491 · form4.xml · nonDerivative · entry 2

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 238,605

F1 · shares: SIGA Technologies, Inc. (the "Issuer") has certain tax withholding obligations associated with the vesting of restricted stock units ("RSUs") and the consequent issuance of Common Stock of the Issuer. This Form 4 reports the surrender to the Issuer by the Reporting Person of 13,005 shares of Common Stock -- granted in the form of RSUs on July 31, 2019 -- in order to satisfy those withholding tax obligations.

SEC source: 0001140361-20-017491 · form4.xml · nonDerivative · entry 1

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 251,610

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001140361-19-022294 · form4.xml · nonDerivative · entry 1

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 224,943

SEC source: 0001140361-19-014139 · form4.xml · derivative · entry 3

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 53,334

Underlying: Common Stock, par value $.0001 per share · 53,334 shares

Expires not disclosed

F2 · derivative.exercise_price: The RSUs vest in equal yearly installments over a period of two (2) years, with the first 1/2 of such RSUs vesting on July 31, 2020 and the remaining 1/2 of such RSUs vesting on July 31, 2021. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

F2 · derivative.exercise_date: The RSUs vest in equal yearly installments over a period of two (2) years, with the first 1/2 of such RSUs vesting on July 31, 2020 and the remaining 1/2 of such RSUs vesting on July 31, 2021. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

F2 · derivative.expiration_date: The RSUs vest in equal yearly installments over a period of two (2) years, with the first 1/2 of such RSUs vesting on July 31, 2020 and the remaining 1/2 of such RSUs vesting on July 31, 2021. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

SEC source: 0001140361-19-014139 · form4.xml · nonDerivative · entry 2

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 219,943

F1 · shares: This Form 4 reports the grant to the Reporting Person of 26,666 shares of common stock of SIGA Technologies (the "Issuer") pursuant to the Issuer's 2010 Stock Incentive Plan and the related surrender to the Issuer of 12,788 of such shares to satisfy certain tax withholding obligations of the Issuer associated with such grant. No shares of common stock of the Issuer were sold by the Reporting Person in a market transaction.

SEC source: 0001140361-19-014139 · form4.xml · nonDerivative · entry 1

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 232,731

F1 · shares: This Form 4 reports the grant to the Reporting Person of 26,666 shares of common stock of SIGA Technologies (the "Issuer") pursuant to the Issuer's 2010 Stock Incentive Plan and the related surrender to the Issuer of 12,788 of such shares to satisfy certain tax withholding obligations of the Issuer associated with such grant. No shares of common stock of the Issuer were sold by the Reporting Person in a market transaction.

SEC source: 0001140361-18-045213 · form4.xml · derivative · entry 3

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.0001 per share · 132,000 shares

Expires 2019-02-02

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: The SSARs vested in equal yearly installments over a period of three (3) years, with the first 1/3 of such SSARs vesting on February 2, 2013, the second 1/3 of such SSARs vesting on February 2, 2014, and the remaining 1/3 of such SSARs vesting on February 2, 2015.

SEC source: 0001140361-18-045213 · form4.xml · nonDerivative · entry 2

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 206,065

F1 · shares: This Form 4 reports the exercise of 132,000 stock-settled appreciation rights ("SSARs") for shares of common stock of SIGA Technologies, Inc. (the "Issuer") granted on February 2, 2012 and the related surrender to the Issuer of 28,614 shares of common stock of the Issuer by the Reporting Person in order to satisfy certain tax withholding obligations of the Issuer associated with the exercise of SSARs and the consequent issuance of common stock of the Issuer. No shares of common stock of the Issuer were sold by the Reporting Person in a market transaction.

F2 · shares: Each SSAR consists of the right to receive an amount, in common stock, equal to the excess of the fair market value of a share of common stock of the Issuer (subject to a cap on the fair market value at $11.00 per share) on the date of exercise over the exercise price of such SSAR. The number of shares of common stock issued was determined by dividing the total of all exercised SSARs by the fair market value of a share of common stock of the Issuer on the date of exercise.

SEC source: 0001140361-18-045213 · form4.xml · nonDerivative · entry 1

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 234,679

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: This Form 4 reports the exercise of 132,000 stock-settled appreciation rights ("SSARs") for shares of common stock of SIGA Technologies, Inc. (the "Issuer") granted on February 2, 2012 and the related surrender to the Issuer of 28,614 shares of common stock of the Issuer by the Reporting Person in order to satisfy certain tax withholding obligations of the Issuer associated with the exercise of SSARs and the consequent issuance of common stock of the Issuer. No shares of common stock of the Issuer were sold by the Reporting Person in a market transaction.

F2 · shares: Each SSAR consists of the right to receive an amount, in common stock, equal to the excess of the fair market value of a share of common stock of the Issuer (subject to a cap on the fair market value at $11.00 per share) on the date of exercise over the exercise price of such SSAR. The number of shares of common stock issued was determined by dividing the total of all exercised SSARs by the fair market value of a share of common stock of the Issuer on the date of exercise.

SEC source: 0001140361-17-000862 · form4.xml · derivative · entry 3

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.0001 per share · 33,334 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Represents vesting and conversion of certain RSUs granted on January 3, 2014. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

F2 · derivative.exercise_date: Represents vesting and conversion of certain RSUs granted on January 3, 2014. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

F2 · derivative.expiration_date: Represents vesting and conversion of certain RSUs granted on January 3, 2014. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

SEC source: 0001140361-17-000862 · form4.xml · nonDerivative · entry 2

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 175,714

F1 · shares: SIGA Technologies, Inc. (the "Issuer") has certain tax withholding obligations associated with the vesting of restricted stock units ("RSUs") and the consequent issuance of Common Stock of the Issuer. This Form 4 reports the surrender to the Issuer by the Reporting Person of 14,029 shares of Common Stock -- granted in the form of RSUs on January 3, 2014 -- in order to satisfy those withholding tax obligations.

SEC source: 0001140361-17-000862 · form4.xml · nonDerivative · entry 1

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 189,743

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001140361-16-089416 · form4.xml · derivative · entry 5

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,334

Underlying: Common Stock, par value $.0001 per share · 33,333 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Represents vesting and conversion of certain RSUs granted on January 3, 2014. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

F3 · derivative.exercise_date: Represents vesting and conversion of certain RSUs granted on January 3, 2014. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

F3 · derivative.expiration_date: Represents vesting and conversion of certain RSUs granted on January 3, 2014. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

SEC source: 0001140361-16-089416 · form4.xml · derivative · entry 4

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.0001 per share · 33,335 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Represents vesting and conversion of certain RSUs granted on January 3, 2013. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

F2 · derivative.exercise_date: Represents vesting and conversion of certain RSUs granted on January 3, 2013. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

F2 · derivative.expiration_date: Represents vesting and conversion of certain RSUs granted on January 3, 2013. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

SEC source: 0001140361-16-089416 · form4.xml · nonDerivative · entry 3

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 156,409

F1 · shares: SIGA Technologies, Inc. (the "Issuer") has certain tax withholding obligations associated with the vesting of restricted stock units ("RSUs") and the consequent issuance of Common Stock of the Issuer. This Form 4 reports the surrender to the Issuer by the Reporting Person of 24,611 shares of Common Stock -- granted in the form of RSUs on January 3, 2013 and January 3, 2014 -- in order to satisfy those withholding tax obligations.

SEC source: 0001140361-16-089416 · form4.xml · nonDerivative · entry 2

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 181,020

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001140361-16-089416 · form4.xml · nonDerivative · entry 1

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 147,687

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001140361-16-087261 · form4.xml · nonDerivative · entry 1

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 114,352

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Represents the exercise by the reporting person of such reporting person's basic subscription rights (each basic subscription right entitling the reporting person to purchase $0.65 worth of shares of SIGA Technologies, Inc.'s ("SIGA") common stock, par value $0.0001 per share, at a subscription price equal to $1.50 per share), issued pro rata to holders of SIGA common stock as of October 12, 2016 in a rights offering.