Twin Vee Holdco Inc.

Exhibit 4.3 WARRANT AGREEMENT between USFM CORPORATION and FG MERCHANT PARTNERS, LP Dated effective as of July 7, 2026 THIS WARRANT AGREEMENT (this “Agreement”), dated effective as of July 7, 2026, 2026, is by and between USFM Corporation, a Colorado Corporation (the “Company”), and FG Merchant Partners, LP (the “Holder”) WHEREAS, the Company has entered into a subscription agreement ( the “Subscription Agreement”) with the Holder, pursuant to which the Holder agreed to purchase an aggre…

S-4 · 2026-10-27 · 0001104659-26-118896

Exhibit 4.4 PROMISSORY NOTE (Convertible at Next Priced Round) Principal Amount: $300,000.00 USD Issue Date: May 1, 2026 Place of Execution: State of Colorado FOR VALUE RECEIVED, the undersigned, USFM Corp., a Colorado corporation (the “Borrower”), hereby unconditionally promises to pay to the order FG Nexus Inc., a Nevada Corporation (the “Lender”), the principal sum of Three Hundred Thousand and 00/100 U.S. Dollars ($300,000.00) (the “Principal Amount”), together with interest thereon an…

S-4 · 2026-10-27 · 0001104659-26-118896

Exhibit 4.6 USFM CORPORATION OFFERING OF COMMON STOCK SUBSCRIPTION AGREEMENT By signing and submitting this subscription agreement (the “Subscription Agreement”) with respect to the offering (the “Offering”) of Shares (as defined below) of USFM Corporation, a Colorado corporation (the “Company”), the undersigned investor (“you” or “Subscriber”) represents and agrees, and intends that the Company rely on your representations and agreements, as follows (except to the extent that the Company is…

S-4 · 2026-10-27 · 0001104659-26-118896