Borg Bjarne Erik Siwert

SEC source: 0001213900-26-068980 · ownership.xml · derivative · entry 2

Borg Bjarne Erik Siwert · CIK 0002061388 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Index Equity US LLC

Disclosed balance after: 619,084

Underlying: Common Stock · 619,084 shares

Expires 2031-06-11

F2 · kind: On June 11, 2026, the Issuer and Index Equity US LLC ("Index Equity"), an entity controlled by the Reporting Person, entered into an exchange agreement, pursuant to which $7,169,072.79 of principal and accrued interest outstanding owed under a promissory note held by Index Equity was exchanged for 7,169 shares of Series C Preferred Stock and a common stock purchase warrant to purchase up to 619,084 shares of the Issuer's common stock. The exchange agreement and the exchange of the promissory note for the shares of Series C Preferred Stock and the warrant were approved in advance by the Issuer's board of directors.

F2 · price: On June 11, 2026, the Issuer and Index Equity US LLC ("Index Equity"), an entity controlled by the Reporting Person, entered into an exchange agreement, pursuant to which $7,169,072.79 of principal and accrued interest outstanding owed under a promissory note held by Index Equity was exchanged for 7,169 shares of Series C Preferred Stock and a common stock purchase warrant to purchase up to 619,084 shares of the Issuer's common stock. The exchange agreement and the exchange of the promissory note for the shares of Series C Preferred Stock and the warrant were approved in advance by the Issuer's board of directors.

F3 · derivative.exercise_date: The shares of Series C Preferred Stock are convertible into shares of common stock and the Warrants are exercisable for shares of common stock at any time at the election of the holder; provided, however, that, to the extent required by the rules and regulations of the Nasdaq Stock Market, LLC, no shares of Series C Preferred Stock shall be convertible into shares of common stock and no Warrants shall be exercisable for shares of common stock unless and until stockholder approval of such conversions and exercises, respectively, is obtained.

F5 · ownership.nature: The Reporting Person is the manager of Index Equity. The Reporting Person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein.

SEC source: 0001213900-26-068980 · ownership.xml · derivative · entry 1

Borg Bjarne Erik Siwert · CIK 0002061388 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Index Equity US LLC

Disclosed balance after: 7,169

Underlying: Common Stock · 2,476,338 shares

Expires not disclosed

F1 · derivative.exercise_price: The shares of Series C Convertible Preferred Stock ("Series C Preferred Stock") held by the Reporting Person are initially convertible into an aggregate of 2,476,338.51 shares of the Issuer's common stock at a price of $2.895 per share; provided, however, that the conversion price is subject to adjustment in certain circumstances, to a price not to fall below $1.50 per share, including in the event the Issuer sells or issues securities at a price that is less than $2.895 per share while the shares of Series C Preferred Stock are outstanding, which may result in the issuance of additional shares of common stock upon conversion of the shares of Series C Preferred Stock.

F2 · kind: On June 11, 2026, the Issuer and Index Equity US LLC ("Index Equity"), an entity controlled by the Reporting Person, entered into an exchange agreement, pursuant to which $7,169,072.79 of principal and accrued interest outstanding owed under a promissory note held by Index Equity was exchanged for 7,169 shares of Series C Preferred Stock and a common stock purchase warrant to purchase up to 619,084 shares of the Issuer's common stock. The exchange agreement and the exchange of the promissory note for the shares of Series C Preferred Stock and the warrant were approved in advance by the Issuer's board of directors.

F2 · price: On June 11, 2026, the Issuer and Index Equity US LLC ("Index Equity"), an entity controlled by the Reporting Person, entered into an exchange agreement, pursuant to which $7,169,072.79 of principal and accrued interest outstanding owed under a promissory note held by Index Equity was exchanged for 7,169 shares of Series C Preferred Stock and a common stock purchase warrant to purchase up to 619,084 shares of the Issuer's common stock. The exchange agreement and the exchange of the promissory note for the shares of Series C Preferred Stock and the warrant were approved in advance by the Issuer's board of directors.

F3 · derivative.exercise_date: The shares of Series C Preferred Stock are convertible into shares of common stock and the Warrants are exercisable for shares of common stock at any time at the election of the holder; provided, however, that, to the extent required by the rules and regulations of the Nasdaq Stock Market, LLC, no shares of Series C Preferred Stock shall be convertible into shares of common stock and no Warrants shall be exercisable for shares of common stock unless and until stockholder approval of such conversions and exercises, respectively, is obtained.

F4 · derivative.expiration_date: The shares of Series C Preferred Stock do not expire.

F1 · derivative.underlying_shares: The shares of Series C Convertible Preferred Stock ("Series C Preferred Stock") held by the Reporting Person are initially convertible into an aggregate of 2,476,338.51 shares of the Issuer's common stock at a price of $2.895 per share; provided, however, that the conversion price is subject to adjustment in certain circumstances, to a price not to fall below $1.50 per share, including in the event the Issuer sells or issues securities at a price that is less than $2.895 per share while the shares of Series C Preferred Stock are outstanding, which may result in the issuance of additional shares of common stock upon conversion of the shares of Series C Preferred Stock.

F1 · balance_after: The shares of Series C Convertible Preferred Stock ("Series C Preferred Stock") held by the Reporting Person are initially convertible into an aggregate of 2,476,338.51 shares of the Issuer's common stock at a price of $2.895 per share; provided, however, that the conversion price is subject to adjustment in certain circumstances, to a price not to fall below $1.50 per share, including in the event the Issuer sells or issues securities at a price that is less than $2.895 per share while the shares of Series C Preferred Stock are outstanding, which may result in the issuance of additional shares of common stock upon conversion of the shares of Series C Preferred Stock.

F5 · ownership.nature: The Reporting Person is the manager of Index Equity. The Reporting Person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein.

SEC source: 0001493152-26-008508 · ownership.xml · nonDerivative · entry 1

Borg Bjarne Erik Siwert · CIK 0002061388 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,000

F1 · shares: The shares reported here were issued to the reporting person pursuant to the JFB Construction Holdings 2024 Equity Incentive Plan, as approved by the Board of Directors upon recommendation of the Compensation Committee, on January 16, 2026.

SEC source: 0001213900-25-126062 · ownership.xml · derivative · entry 1

Borg Bjarne Erik Siwert · CIK 0002061388 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,000

Underlying: Common Stock · 80,000 shares

Expires 2035-12-21

F1 · security: The options vest pro rata on a monthly basis over six months commencing on January 22, 2026, subject to the Reporting Person's continued service to the Issuer through each vesting date.

F1 · derivative.exercise_date: The options vest pro rata on a monthly basis over six months commencing on January 22, 2026, subject to the Reporting Person's continued service to the Issuer through each vesting date.

SEC source: 0001213900-25-101234 · ownership.xml · derivative · entry 2

Borg Bjarne Erik Siwert · CIK 0002061388 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Index Equity US LLC and Index Resource Equity LLC

Disclosed balance after: 304,099

Underlying: Common Stock · 1,090,002 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.

F1 · derivative.exercise_price: Each share of Series A Convertible Preferred Stock ("Series A Preferred") is convertible into six shares of the Issuer's common stock, par value $0.001 per share (the "Common Stock"), subject to compliance with Nasdaq rules.

F2 · derivative.exercise_date: On September 29, 2025, the Issuer's stockholders approved the issuance of the Issuer's Common Stock upon the conversion of the Issuer's Series A Preferred.

F3 · derivative.expiration_date: There is no expiration date related to the conversion of shares of the Issuer's Series A Preferred into shares of Issuer's Common Stock.

F1 · derivative.underlying_shares: Each share of Series A Convertible Preferred Stock ("Series A Preferred") is convertible into six shares of the Issuer's common stock, par value $0.001 per share (the "Common Stock"), subject to compliance with Nasdaq rules.

F4 · derivative.underlying_shares: Total shares of Common Stock include 1,090,006 shares of Common Stock held by Index Equity US LLC. Total shares of Series A Preferred include 303,949 shares of Series A Preferred held by Index Equity US LLC ("IEU") and 150 shares of Series A Preferred held by Index Resource Equity LLC ("IRE"). The Reporting Person is the manager of IEU and the manager of Index Management Services LLC, which is the manager of IRE.

F5 · ownership.nature: The Reporting Person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein.

SEC source: 0001213900-25-101234 · ownership.xml · nonDerivative · entry 1

Borg Bjarne Erik Siwert · CIK 0002061388 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Index Equity US LLC and Index Resource Equity LLC

Disclosed balance after: 1,212,032

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: Each share of Series A Convertible Preferred Stock ("Series A Preferred") is convertible into six shares of the Issuer's common stock, par value $0.001 per share (the "Common Stock"), subject to compliance with Nasdaq rules.

F1 · price: Each share of Series A Convertible Preferred Stock ("Series A Preferred") is convertible into six shares of the Issuer's common stock, par value $0.001 per share (the "Common Stock"), subject to compliance with Nasdaq rules.

F3 · ownership.nature: There is no expiration date related to the conversion of shares of the Issuer's Series A Preferred into shares of Issuer's Common Stock.

SEC source: 0001213900-25-095612 · ownership.xml · derivative · entry 2

Borg Bjarne Erik Siwert · CIK 0002061388 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Index Equity US LLC and Index Resource Equity LLC

Disclosed balance after: 485,766

Underlying: Common Stock · 1,060,489 shares

Expires not disclosed

F4 · derivative.exercise_price: Each share of Series A Preferred is convertible into six shares of the Issuer's Common Stock, subject to compliance with Nasdaq rules.

F1 · shares: At the Issuer's Annual Meeting of Stockholders held on September 29, 2025, the Issuer's stockholders approved the issuance of the Issuer's common stock, par value $0.001 per share (the "Common Stock") upon the conversion of the Issuer's Series A Convertible Preferred Stock pursuant to the terms set forth in the Certificate of Designation of Preferences, Rights and Limitations of Series A Convertible Preferred Stock ("Series A Preferred"). Stockholder approval of the conversion feature of the shares of Series A Preferred held by the Reporting Person is being reported herein as a disposition of a non-derivative security to the Issuer and an acquisition of a derivative security from the Issuer. There is no expiration date related to the conversion of the shares of Series A Preferred into shares of Common Stock.

F2 · shares: Total includes 485,616 shares of Series A Preferred held by Index Equity US LLC ("IEU") and 150 shares of Series A Preferred held by Index Resource Equity LLC ("IRE"). The Reporting Person is the manager of IEU and the manager of Index Management Services LLC, which is the manager of IRE.

F6 · price: The Reporting Person received the shares of Series A Preferred from the Issuer as partial consideration for the Reporting Person's membership interest in Resource Group in connection with the Issuer's acquisition of Resource Group US Holdings LLC ("Resource Group") pursuant to the Membership Interests Purchase Agreement, dated as of February 25, 2025, as amended June 2, 2025.

F1 · derivative.expiration_date: At the Issuer's Annual Meeting of Stockholders held on September 29, 2025, the Issuer's stockholders approved the issuance of the Issuer's common stock, par value $0.001 per share (the "Common Stock") upon the conversion of the Issuer's Series A Convertible Preferred Stock pursuant to the terms set forth in the Certificate of Designation of Preferences, Rights and Limitations of Series A Convertible Preferred Stock ("Series A Preferred"). Stockholder approval of the conversion feature of the shares of Series A Preferred held by the Reporting Person is being reported herein as a disposition of a non-derivative security to the Issuer and an acquisition of a derivative security from the Issuer. There is no expiration date related to the conversion of the shares of Series A Preferred into shares of Common Stock.

F5 · derivative.underlying_shares: To maintain the Reporting Person's interest below 19.99% in accordance with Nasdaq rules, as of the date hereof, the shares of Series A Preferred held by the Reporting Person are convertible into 1,060,489 shares of the Issuer's Common Stock (notwithstanding that 485,766 shares of Series A Preferred would otherwise be convertible, at a conversion ratio of six shares of the Issuer's Common Stock for each share of Series A Preferred, into 2,914,596 shares of the Issuer's Common Stock).

F3 · ownership.nature: The Reporting Person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein.

SEC source: 0001213900-25-095612 · ownership.xml · nonDerivative · entry 1

Borg Bjarne Erik Siwert · CIK 0002061388 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Index Equity US LLC and Index Resource Equity LLC

Disclosed balance after: 0

F1 · shares: At the Issuer's Annual Meeting of Stockholders held on September 29, 2025, the Issuer's stockholders approved the issuance of the Issuer's common stock, par value $0.001 per share (the "Common Stock") upon the conversion of the Issuer's Series A Convertible Preferred Stock pursuant to the terms set forth in the Certificate of Designation of Preferences, Rights and Limitations of Series A Convertible Preferred Stock ("Series A Preferred"). Stockholder approval of the conversion feature of the shares of Series A Preferred held by the Reporting Person is being reported herein as a disposition of a non-derivative security to the Issuer and an acquisition of a derivative security from the Issuer. There is no expiration date related to the conversion of the shares of Series A Preferred into shares of Common Stock.

F2 · shares: Total includes 485,616 shares of Series A Preferred held by Index Equity US LLC ("IEU") and 150 shares of Series A Preferred held by Index Resource Equity LLC ("IRE"). The Reporting Person is the manager of IEU and the manager of Index Management Services LLC, which is the manager of IRE.

F1 · price: At the Issuer's Annual Meeting of Stockholders held on September 29, 2025, the Issuer's stockholders approved the issuance of the Issuer's common stock, par value $0.001 per share (the "Common Stock") upon the conversion of the Issuer's Series A Convertible Preferred Stock pursuant to the terms set forth in the Certificate of Designation of Preferences, Rights and Limitations of Series A Convertible Preferred Stock ("Series A Preferred"). Stockholder approval of the conversion feature of the shares of Series A Preferred held by the Reporting Person is being reported herein as a disposition of a non-derivative security to the Issuer and an acquisition of a derivative security from the Issuer. There is no expiration date related to the conversion of the shares of Series A Preferred into shares of Common Stock.

F3 · ownership.nature: The Reporting Person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein.

SEC source: 0001641172-25-024958 · ownership.xml · nonDerivative · entry 1

Borg Bjarne Erik Siwert · CIK 0002061388 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,000

F1 · shares: The shares reported here were issued to the reporting person pursuant to the JFB Construction Holdings 2024 Equity Incentive Plan, as approved by the Board of Directors upon recommendation of the Compensation Committee, on June 30, 2025.