SLDP

SEC source: 0001317458-24-000003 · primary_doc.xml · nonDerivative · entry 1

Van Scoter John C. · CIK 0001317458 · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,425,197

F1 · shares: Represents shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units.

SEC source: 0001891897-24-000009 · primary_doc.xml · nonDerivative · entry 1

Liebscher James · CIK 0001891897 · Chief Legal Officer & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 752,678

F1 · shares: Represents shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units.

SEC source: 0001441617-24-000003 · primary_doc.xml · derivative · entry 2

Heller Linda C. · CIK 0001441617 · CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,757,960

Underlying: Common Stock · 1,757,960 shares

Expires 2034-06-17

F2 · derivative.exercise_date: The stock option will vest as to 25% of the shares of the Issuer's common stock underlying the grant on June 17, 2025, and will vest as to the remaining 75% of the shares underlying the grant in 12 equal quarterly installments commencing on June 30, 2025, and thereafter at the end of each fiscal quarter of the Issuer, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through the applicable vesting date.

SEC source: 0001441617-24-000003 · primary_doc.xml · nonDerivative · entry 1

Heller Linda C. · CIK 0001441617 · CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 872,627

F1 · shares: Each restricted stock unit represents a contingent right to receive one share of the underlying common stock of the Issuer. The restricted stock units will vest as to 25% of the granted number on June 17, 2025, and the remaining 75% of the granted number will vest in 12 equal quarterly installments commencing on June 30, 2025, and thereafter at the end of each fiscal quarter of the Issuer, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through the applicable vesting date.

SEC source: 0001880162-24-000010 · primary_doc.xml · derivative · entry 3

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,878,579

Underlying: Common Stock · 187,500 shares

Expires 2025-03-20

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: The transactions reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 1, 2023 (the "10b5-1 Plan") for a stock option award set to expire on March 20, 2025. The 10b5-1 Plan is structured to include several sale periods and was established to cover the reporting person's tax liability arising from the option exercises and for longer-term asset diversification.

SEC source: 0001880162-24-000010 · primary_doc.xml · nonDerivative · entry 2

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 687,473

F2 · shares: This sale was made pursuant to the 10b5-1 Plan.

F3 · price: This transaction was executed in multiple trades at prices ranging from $1.645 to $1.68. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001880162-24-000010 · primary_doc.xml · nonDerivative · entry 1

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 874,973

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: The transactions reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 1, 2023 (the "10b5-1 Plan") for a stock option award set to expire on March 20, 2025. The 10b5-1 Plan is structured to include several sale periods and was established to cover the reporting person's tax liability arising from the option exercises and for longer-term asset diversification.

SEC source: 0001317458-24-000002 · primary_doc.xml · nonDerivative · entry 1

Van Scoter John C. · CIK 0001317458 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,453,506

F1 · shares: Represents shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units.

SEC source: 0001891897-24-000008 · primary_doc.xml · nonDerivative · entry 1

Liebscher James · CIK 0001891897 · Chief Legal Officer & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 758,299

F1 · shares: Represents shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units.

SEC source: 0001225208-24-006338 · doc4.xml · nonDerivative · entry 1

ANDERSON ERIK J · CIK 0001174968 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 141,562

F1 · shares: Represents restricted stock units, which upon vesting of the unit, represent the right to receive one share of the issuer's common stock. The restricted stock units vest upon the earlier of: (i) the first anniversary of the grant date or (ii) the day before the issuer's next annual meeting of stockholders following the grant date, in each case, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through such vesting date.

SEC source: 0001903970-24-000001 · primary_doc.xml · nonDerivative · entry 1

Roe Lesa B · CIK 0001903970 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 177,141

F1 · shares: Represents restricted stock units, which upon vesting of the unit, represent the right to receive one share of the issuer's common stock. The restricted stock units vest upon the earlier of: (i) the first anniversary of the grant date or (ii) the day before the issuer's next annual meeting of stockholders following the grant date, in each case, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through such vesting date.

SEC source: 0001879989-24-000001 · primary_doc.xml · nonDerivative · entry 1

Goldberg Steven H · CIK 0001879989 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 141,562

F1 · shares: Represents restricted stock units, which upon vesting of the unit, represent the right to receive one share of the issuer's common stock. The restricted stock units vest upon the earlier of: (i) the first anniversary of the grant date or (ii) the day before the issuer's next annual meeting of stockholders following the grant date, in each case, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through such vesting date.

SEC source: 0001751431-24-000001 · primary_doc.xml · nonDerivative · entry 1

Awada Kaled · CIK 0001751431 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 188,680

F1 · shares: Represents restricted stock units, which upon vesting of the unit, represent the right to receive one share of the issuer's common stock. The restricted stock units vest upon the earlier of: (i) the first anniversary of the grant date or (ii) the day before the issuer's next annual meeting of stockholders following the grant date, in each case, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through such vesting date.

SEC source: 0001891897-24-000006 · primary_doc.xml · nonDerivative · entry 1

STEPHENS JOHN JOSEPH · CIK 0001258391 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 157,262

F1 · shares: Represents restricted stock units, which upon vesting of the unit, represent the right to receive one share of the issuer's common stock. The restricted stock units vest upon the earlier of: (i) the first anniversary of the grant date or (ii) the day before the issuer's next annual meeting of stockholders following the grant date, in each case, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through such vesting date.

SEC source: 0001354116-24-000001 · primary_doc.xml · nonDerivative · entry 1

Wright MaryAnn · CIK 0001354116 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 168,789

F1 · shares: Represents restricted stock units, which upon vesting of the unit, represent the right to receive one share of the issuer's common stock. The restricted stock units vest upon the earlier of: (i) the first anniversary of the grant date or (ii) the day before the issuer's next annual meeting of stockholders following the grant date, in each case, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through such vesting date.

SEC source: 0001891897-24-000005 · primary_doc.xml · nonDerivative · entry 1

Kreh Susan M · CIK 0001393657 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 188,680

F1 · shares: Represents restricted stock units, which upon vesting of the unit, represent the right to receive one share of the issuer's common stock. The restricted stock units vest upon the earlier of: (i) the first anniversary of the grant date or (ii) the day before the issuer's next annual meeting of stockholders following the grant date, in each case, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through such vesting date.

SEC source: 0001891897-24-000007 · primary_doc.xml · nonDerivative · entry 1

Miziolek Aleksandra A · CIK 0001599142 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 178,121

F1 · shares: Represents restricted stock units, which upon vesting of the unit, represent the right to receive one share of the issuer's common stock. The restricted stock units vest upon the earlier of: (i) the first anniversary of the grant date or (ii) the day before the issuer's next annual meeting of stockholders following the grant date, in each case, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through such vesting date.

SEC source: 0001880162-24-000009 · primary_doc.xml · derivative · entry 3

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,066,079

Underlying: Common Stock · 187,500 shares

Expires 2025-03-20

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: The transactions reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 1, 2023 (the "10b5-1 Plan") for a stock option award set to expire on March 20, 2025. The 10b5-1 Plan is structured to include several sale periods and was established to cover the reporting person's tax liability arising from the option exercises and for longer-term asset diversification.

SEC source: 0001880162-24-000009 · primary_doc.xml · nonDerivative · entry 2

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 687,473

F2 · shares: This sale was made pursuant to the 10b5-1 Plan.

F3 · price: This transaction was executed in multiple trades at prices ranging from $1.645 to $1.725. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001880162-24-000009 · primary_doc.xml · nonDerivative · entry 1

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 874,973

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: The transactions reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 1, 2023 (the "10b5-1 Plan") for a stock option award set to expire on March 20, 2025. The 10b5-1 Plan is structured to include several sale periods and was established to cover the reporting person's tax liability arising from the option exercises and for longer-term asset diversification.

SEC source: 0001882289-24-000004 · primary_doc.xml · nonDerivative · entry 1

Johnson Derek Colby · CIK 0001882289 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 853,090

F1 · shares: Represents shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units.

SEC source: 0001880162-24-000008 · primary_doc.xml · nonDerivative · entry 1

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 687,473

F1 · shares: Represents shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units.

SEC source: 0001738972-24-000004 · primary_doc.xml · nonDerivative · entry 1

Paprzycki Kevin A. · CIK 0001738972 · CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 738,364

F1 · shares: Represents shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units.

SEC source: 0001891897-24-000004 · primary_doc.xml · nonDerivative · entry 1

Liebscher James · CIK 0001891897 · Chief Legal Officer & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 771,034

F1 · shares: Represents shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units.

SEC source: 0001880162-24-000007 · primary_doc.xml · derivative · entry 3

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,253,579

Underlying: Common Stock · 187,500 shares

Expires 2025-03-20

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: The transactions reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 1, 2023 (the "10b5-1 Plan") for a stock option award set to expire on March 20, 2025. The 10b5-1 Plan is structured to include several sale periods and was established to cover the reporting person's tax liability arising from the option exercises and for longer-term asset diversification.

SEC source: 0001880162-24-000007 · primary_doc.xml · nonDerivative · entry 2

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 692,993

F2 · shares: This sale was made pursuant to the 10b5-1 Plan.

F3 · price: This transaction was executed in multiple trades at prices ranging from $1.82 to $1.915. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001880162-24-000007 · primary_doc.xml · nonDerivative · entry 1

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 880,493

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: The transactions reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 1, 2023 (the "10b5-1 Plan") for a stock option award set to expire on March 20, 2025. The 10b5-1 Plan is structured to include several sale periods and was established to cover the reporting person's tax liability arising from the option exercises and for longer-term asset diversification.

SEC source: 0001882289-24-000003 · primary_doc.xml · nonDerivative · entry 1

Johnson Derek Colby · CIK 0001882289 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 862,749

F1 · shares: Represents shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units.

SEC source: 0001880162-24-000006 · primary_doc.xml · nonDerivative · entry 1

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 692,993

F1 · shares: Represents shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units.

SEC source: 0001738972-24-000003 · primary_doc.xml · nonDerivative · entry 1

Paprzycki Kevin A. · CIK 0001738972 · CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 746,643

F1 · shares: Represents shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units.

SEC source: 0001891897-24-000003 · primary_doc.xml · nonDerivative · entry 1

Liebscher James · CIK 0001891897 · Chief Legal Officer & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 776,898

F1 · shares: Represents shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units.

SEC source: 0001882289-24-000002 · primary_doc.xml · derivative · entry 2

Johnson Derek Colby · CIK 0001882289 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,074,758

Underlying: Common Stock · 1,074,758 shares

Expires 2034-03-22

F2 · derivative.exercise_date: The stock option will vest as to 25% of the shares of the Issuer's common stock underlying the grant on March 22, 2025, and will vest as to the remaining 75% of the shares underlying the grant in 12 equal quarterly installments commencing on March 31, 2025, and thereafter at the end of each fiscal quarter of the Issuer, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through the applicable vesting date.

SEC source: 0001882289-24-000002 · primary_doc.xml · nonDerivative · entry 1

Johnson Derek Colby · CIK 0001882289 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 869,694

F1 · shares: Each restricted stock unit represents a contingent right to receive one share of the underlying common stock of the Issuer. The restricted stock units will vest as to 25% of the granted number on March 22, 2025, and the remaining 75% of the granted number will vest in 12 equal quarterly installments commencing on March 31, 2025, and thereafter at the end of each fiscal quarter of the Issuer, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through the applicable vesting date.

SEC source: 0001880162-24-000005 · primary_doc.xml · derivative · entry 2

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 683,372

Underlying: Common Stock · 683,372 shares

Expires 2034-03-22

F2 · derivative.exercise_date: The stock option will vest as to 25% of the shares of the Issuer's common stock underlying the grant on March 22, 2025, and will vest as to the remaining 75% of the shares underlying the grant in 12 equal quarterly installments commencing on March 31, 2025, and thereafter at the end of each fiscal quarter of the Issuer, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through the applicable vesting date.

SEC source: 0001880162-24-000005 · primary_doc.xml · nonDerivative · entry 1

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 697,409

F1 · shares: Each restricted stock unit represents a contingent right to receive one share of the underlying common stock of the Issuer. The restricted stock units will vest as to 25% of the granted number on March 22, 2025, and the remaining 75% of the granted number will vest in 12 equal quarterly installments commencing on March 31, 2025, and thereafter at the end of each fiscal quarter of the Issuer, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through the applicable vesting date.

SEC source: 0001317458-24-000001 · primary_doc.xml · derivative · entry 2

Van Scoter John C. · CIK 0001317458 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,006,420

Underlying: Common Stock · 1,006,420 shares

Expires 2034-03-22

F2 · derivative.exercise_date: The stock option will vest as to 25% of the shares of the Issuer's common stock underlying the grant on March 22, 2025, and will vest as to the remaining 75% of the shares underlying the grant in 12 equal quarterly installments commencing on March 31, 2025, and thereafter at the end of each fiscal quarter of the Issuer, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through the applicable vesting date.

SEC source: 0001317458-24-000001 · primary_doc.xml · nonDerivative · entry 1

Van Scoter John C. · CIK 0001317458 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,566,740

F1 · shares: Each restricted stock unit represents a contingent right to receive one share of the underlying common stock of the Issuer. The restricted stock units will vest as to 25% of the granted number on March 22, 2025, and the remaining 75% of the granted number will vest in 12 equal quarterly installments commencing on March 31, 2025, and thereafter at the end of each fiscal quarter of the Issuer, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through the applicable vesting date.

SEC source: 0001738972-24-000002 · primary_doc.xml · derivative · entry 2

Paprzycki Kevin A. · CIK 0001738972 · CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 931,871

Underlying: Common Stock · 931,871 shares

Expires 2034-03-22

F2 · derivative.exercise_date: The stock option will vest as to 25% of the shares of the Issuer's common stock underlying the grant on March 22, 2025, and will vest as to the remaining 75% of the shares underlying the grant in 12 equal quarterly installments commencing on March 31, 2025, and thereafter at the end of each fiscal quarter of the Issuer, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through the applicable vesting date.

SEC source: 0001738972-24-000002 · primary_doc.xml · nonDerivative · entry 1

Paprzycki Kevin A. · CIK 0001738972 · CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 752,665

F1 · shares: Each restricted stock unit represents a contingent right to receive one share of the underlying common stock of the Issuer. The restricted stock units will vest as to 25% of the granted number on March 22, 2025, and the remaining 75% of the granted number will vest in 12 equal quarterly installments commencing on March 31, 2025, and thereafter at the end of each fiscal quarter of the Issuer, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through the applicable vesting date.

SEC source: 0001891897-24-000002 · primary_doc.xml · derivative · entry 2

Liebscher James · CIK 0001891897 · Chief Legal Officer & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 869,746

Underlying: Common Stock · 869,746 shares

Expires 2034-03-22

F2 · derivative.exercise_date: The stock option will vest as to 25% of the shares of the Issuer's common stock underlying the grant on March 22, 2025, and will vest as to the remaining 75% of the shares underlying the grant in 12 equal quarterly installments commencing on March 31, 2025, and thereafter at the end of each fiscal quarter of the Issuer, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through the applicable vesting date.

SEC source: 0001891897-24-000002 · primary_doc.xml · nonDerivative · entry 1

Liebscher James · CIK 0001891897 · Chief Legal Officer & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 782,518

F1 · shares: Each restricted stock unit represents a contingent right to receive one share of the underlying common stock of the Issuer. The restricted stock units will vest as to 25% of the granted number on March 22, 2025, and the remaining 75% of the granted number will vest in 12 equal quarterly installments commencing on March 31, 2025, and thereafter at the end of each fiscal quarter of the Issuer, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through the applicable vesting date.

SEC source: 0001880162-24-000004 · primary_doc.xml · derivative · entry 3

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,441,079

Underlying: Common Stock · 187,500 shares

Expires 2025-03-20

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: The transactions reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 1, 2023 (the "10b5-1 Plan") for a stock option award set to expire on March 20, 2025. The 10b5-1 Plan is structured to include several sale periods and was established to cover the reporting person's tax liability arising from the option exercises and for longer-term asset diversification.

SEC source: 0001880162-24-000004 · primary_doc.xml · nonDerivative · entry 2

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 336,539

F2 · shares: This sale was made pursuant to the 10b5-1 Plan.

F3 · price: This transaction was executed in multiple trades at prices ranging from $1.34 to $1.38. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001880162-24-000004 · primary_doc.xml · nonDerivative · entry 1

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 524,039

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: The transactions reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 1, 2023 (the "10b5-1 Plan") for a stock option award set to expire on March 20, 2025. The 10b5-1 Plan is structured to include several sale periods and was established to cover the reporting person's tax liability arising from the option exercises and for longer-term asset diversification.

SEC source: 0001882289-24-000001 · primary_doc.xml · nonDerivative · entry 1

Johnson Derek Colby · CIK 0001882289 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 302,143

F1 · shares: Represents shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units.

SEC source: 0001880162-24-000003 · primary_doc.xml · nonDerivative · entry 1

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 336,539

F1 · shares: Represents shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units.

SEC source: 0001738972-24-000001 · primary_doc.xml · nonDerivative · entry 1

Paprzycki Kevin A. · CIK 0001738972 · CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 260,569

F1 · shares: Represents shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units.

SEC source: 0001891897-24-000001 · primary_doc.xml · nonDerivative · entry 1

Liebscher James · CIK 0001891897 · Chief Legal Officer & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 323,228

F1 · shares: Represents shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units.

SEC source: 0001880162-24-000002 · primary_doc.xml · derivative · entry 3

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,628,579

Underlying: Common Stock · 187,500 shares

Expires 2025-03-20

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: The transactions reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 1, 2023 (the "10b5-1 Plan") for a stock option award set to expire on March 20, 2025. The 10b5-1 Plan is structured to include several sale periods and was established to cover the reporting person's tax liability arising from the option exercises and for longer-term asset diversification.

SEC source: 0001880162-24-000002 · primary_doc.xml · nonDerivative · entry 2

Buettner-Garrett Joshua · CIK 0001880162 · Chief Technology Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 356,433

F2 · shares: This sale was made pursuant to the 10b5-1 Plan.

F3 · price: This transaction was executed in multiple trades at prices ranging from $1.53 to $1.665. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.