Form 8-K

8-K — Senseonics Holdings, Inc.

Accession: 0001104659-26-054861

Filed: 2026-05-04

Period: 2026-05-01

CIK: 0001616543

SIC: 3823 (INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL)

Item: Entry into a Material Definitive Agreement

Item: Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

Item: Financial Statements and Exhibits

Documents

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington,

D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES

EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported):

May 1, 2026

SENSEONICS

HOLDINGS, INC.

(Exact Name of Registrant as Specified in its Charter)

Delaware

001-37717

47-1210911

(State or Other

Jurisdiction of Incorporation)

(Commission File Number)

(IRS Employer

Identification No.)

20451 Seneca Meadows Parkway

Germantown, MD 20876-7005

(Address of Principal Executive Office) (Zip Code)

Registrant's telephone number, including

area code: (301) 515-7260

Not Applicable

Former name or former address, if changed

since last report

Check the appropriate box below if the

Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions

(see General Instruction A.2 below):

¨ Written communications pursuant to Rule 425 under the Securities

Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange

Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under

the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under

the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Common Stock, $0.001 par value

SENS

Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging

growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities

Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the

registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards

provided pursuant to Section 13(a) of the Exchange Act. ¨

Item 1.01 Entry into a Material Definitive Agreement.

On May 1, 2026, Senseonics Holdings, Inc. (the “Company”)

together with several of its wholly-owned subsidiaries (collectively, “Senseonics”) entered into a Second Amendment to Loan

and Security Agreement (the “Second Amendment”) with the several financial institutions or entities party thereto (collectively,

the “Lenders”) and Hercules Capital, Inc., a Maryland corporation (the “Agent”), in its capacity as administrative

agent and collateral agent for itself and the Lenders, which further amends the Company’s existing Loan and Security Agreement,

dated as of September 8, 2023, as previously amended by the First Amendment to Loan and Security Agreement, dated as of September 3, 2025

(as further amended, the “Amended Loan Agreement”), by and among Senseonics, certain of the Lenders and the Agent.

Pursuant to the Amended Loan Agreement, the Lenders have agreed to

make available to Senseonics up to $140.0 million in senior secured term loans, consisting of (i) an initial term loan of $35.0 million,

which was previously funded, (ii) a term loan of $10.0 million to be funded at the closing of the Second Amendment (the “Tranche

2 Loan”), (iii) four additional tranches of term loans in the amounts of up to $10.0 million (the “Tranche 3A Loan”),

$10.0 million (the “Tranche 3B Loan”), $15.0 million (the “Tranche 4 Loan”) and uncommitted $60.0 million (the

“Tranche 5 Loan”), respectively, which will become available to Senseonics upon Senseonics’ satisfaction of certain

terms and conditions set forth in the Amended Loan Agreement. The loans under the Amended Loan Agreement mature on September 3, 2029 (the

“Maturity Date”). The Company expects both the Tranche 2 Loan and Tranche 3A Loan to be funded at the closing of the Second

Amendment, which is scheduled to be May 6, 2026 (the “Amendment Closing Date”), subject to customary closing conditions.

The loans under the Amended Loan Agreement bear interest at an annual

rate equal to the greater of (i) the prime rate as reported in The Wall Street Journal plus 2.40% and (ii) 9.90%. Borrowings under the

Amended Loan Agreement are repayable in monthly interest-only payments through (a) October 1, 2028 and (b) if Senseonics satisfies the

2025 Tranche 3B Milestone (as defined in the Amended Loan Agreement), the Maturity Date. After the interest-only payment period, borrowings

under the Amended Loan Agreement are repayable in equal monthly payments of principal and accrued interest until the Maturity Date.

At Senseonics’ option, Senseonics may prepay all or any portion

of the outstanding borrowings under the Amended Loan Agreement, subject to a prepayment fee equal to (a) 3.0% of the principal amount

being prepaid if the prepayment occurs within one year of the Amendment Closing Date, (b) 2.0% of the principal amount being prepaid if

the prepayment occurs during the second year following the Amendment Closing Date, and (c) 1.00% of the principal amount being prepaid

if the prepayment occurs more than two years after the Amendment Closing Date and prior to the Maturity Date. In addition, a $100,000

facility fee and a $100,000 amendment fee are payable on the Amendment Closing Date and Senseonics will pay additional facility fees in

the amount of 0.50% of any drawn Tranche 3B Loan, or in the amount of 1.00% of any drawn Tranche 4 Loan or Tranche 5 Loan.

Pursuant to the Amended Loan Agreement, the Company agreed to issue

additional warrants (the “Additional Warrants”) in substantially the same form as the warrants issued in connection with the

initial term loan upon the funding of the Tranche 2 Loan, Tranche 3A Loan, Tranche 3B Loan, Tranche 4 Loan and Tranche 5 Loan. The Additional

Warrants may be exercised through the earlier of (i) the seventh anniversary of the applicable issuance date and (ii) the consummation

of certain acquisition transactions involving the Company, as set forth in such Additional Warrants. The number of shares of the Company’s

common stock for which the Additional Warrants are exercisable and the associated exercise price are subject to certain customary proportional

adjustments for fundamental events, including stock splits and reverse stock splits, as set forth in the Additional Warrants. The Additional

Warrants would be exercisable for an aggregate number of shares of the Company’s common stock equal to 2.0% of the funded loan amount

divided by the exercise price equal to the three-day volume-weighted average price of the Company’s common stock prior to the issuance

date of such Additional Warrants.

The foregoing descriptions of the Amended Loan Agreement and the Additional

Warrants contained herein do not purport to be complete and are qualified in their entirety by reference to the full text of the Amended

Loan Agreement, which is expected to be filed at the time of the Company’s Quarterly Report on 10-Q for the second quarter 2026,

and the form of Warrant Agreement, which was filed as Exhibit 10.1 to the Form 8-K filed by the Company on September 11, 2023, and incorporated

herein by reference.

Item 2.03 Creation of a Direct Financial Obligation or an Obligation

under an Off-Balance Sheet Arrangement of a Registrant.

The information included under Item 1.01 above is incorporated by reference

into this Item 2.03.

Forward-Looking Statements

This Current Report on Form 8-K contains forward-looking statements

made in reliance upon the safe harbor provisions of Section 27A of the Securities Act and Section 21E of the Exchange Act. Forward-looking

statements include all statements that do not relate solely to historical or current facts, and can be identified by the use of words

such as “may,” “will,” “expect,” “project,” “estimate,” “anticipate,”

“plan,” “believe,” “potential,” “should,” “continue” or the negative versions

of those words or other comparable words. These forward-looking statements include statements related to the anticipated closing of the

Amended Loan Agreement, and the availability of funding of future tranches of term loans under the Amended Loan Agreement. These forward-looking

statements are based on information currently available to the Company and its current plans or expectations and are subject to a number

of uncertainties and risks that could significantly affect current plans. Actual results and performance could differ materially from

those projected in the forward-looking statements as a result of many factors, including the uncertainties related to the Company’s

ability to satisfy milestones for additional borrowing under the Amended Loan Agreement and compliance with covenants thereunder, market

conditions and such other risks and uncertainties described in the Company’s Annual Report on Form 10-K for the year ended December

31, 2025, filed with the Securities and Exchange Commission (“SEC”) on March 2, 2026, and other filings the Company makes

with the SEC from time to time. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as

of the date of this Current Report on Form 8-K. The Company undertakes no duty to update such information except as required under applicable

law.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit

No.

Description

10.1

Form

of Warrant (incorporated herein by reference to Exhibit 10.2 the Company’s Current Report on Form 8-K filed with the SEC on

September 11, 2023).

104*

Cover

Page Interactive Data File (embedded within the Inline XBRL document).

Filed herewith.

Furnished herewith

Certain information has been omitted from this document in accordance with Regulation S-K, Item 601(b)(10).

SIGNATURES

Pursuant to the requirements

of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto

duly authorized.

Date: May 4, 2026

SENSEONICS HOLDINGS, INC.

By:

/s/ Rick Sullivan

Name:

Rick Sullivan

Title:

Chief Financial Officer

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