# EDGAR Filing Document

**Accession Number:** 0001750149
**File Stem:** 0001193125-25-326916
**Filing Date:** 2025-12
**Character Count:** 10067
**Document Hash:** a81884fd210d3c993a84ee38f4dd64c0
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-326916.hdr.sgml**: 20251219

**ACCESSION NUMBER**: 0001193125-25-326916

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20251219

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20251219

**DATE AS OF CHANGE**: 20251219

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Inhibikase Therapeutics, Inc.
- **CENTRAL INDEX KEY:** 0001750149
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 263407249
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39676
- **FILM NUMBER:** 251587780

**BUSINESS ADDRESS:**
- **STREET 1:** 1000 N. WEST STREET, SUITE 1200
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 19801
- **BUSINESS PHONE:** (302) 295-3800

**MAIL ADDRESS:**
- **STREET 1:** 1000 N. WEST STREET, SUITE 1200
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 19801

?xml version='1.0' encoding='ASCII'? 8-K

### 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): December 19, 2025

## INHIBIKASE THERAPEUTICS, INC.

#### (Exact Name of Registrant as Specified in its Charter)

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-39676** | **26-3407249** |
| **(State or Other Jurisdiction**<br> **of Incorporation)** | **(Commission**<br> **File Number)** | **(IRS Employer**<br> **Identification No.)** |

---

---

| | |
|:---|:---|
| **1000 N. West Street, Suite 1200**<br> **Wilmington, DE** | **19801** |
| **(Address of Principal Executive Offices)** | **(Zip Code)** |

---

#### Registrant's Telephone Number, Including Area Code: (302) 295-3800

#### N/A

#### (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**<br> **Symbol(s)** | **Name of each exchange**<br> **on which registered** |
| Common Stock, $0.001 par value | IKT | The 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 8.01.** | **Other Events.**  |

---

On December 19, 2025, Inhibikase Therapeutics, Inc. (the "Company") filed with the Securities and Exchange Commission (the "SEC") a prospectus supplement (the "Prospectus Supplement"), dated December 19, 2025, with respect to the Company's existing "at the market offering" program (the "ATM Program"). Pursuant to the Prospectus Supplement, the Company may offer and sell shares of its common stock having an aggregate offering price of up to $185,000,000, from time to time, through Jefferies LLC as sales agent, pursuant to the Open Market Sale Agreement<sup>SM</sup>, dated as of June 20, 2025, between the Company and Jefferies LLC (the "Sales Agreement").The Prospectus Supplement was filed pursuant to the registration statement on Form S-3 (File No. 333-288213) previously filed with the SEC on June 20, 2025 and declared effective by the SEC on June 27, 2025.

A copy of the Sales Agreement is filed as Exhibit 1.1 to this Current Report on Form 8-K and is incorporated herein by reference.

In connection with the filing of the Prospectus Supplement, the Company is filing as Exhibit 5.1 hereto the opinion of its counsel, Goodwin Procter LLP, which opinion is incorporated herein by reference.

---

| | |
|:---|:---|
| **Item 9.01.** | **Financial Statements and Exhibits.**  |

---

(d) Exhibits.

---

| | |
|:---|:---|
| **Number** | **Description** |
| 1.1 | [Open Market Sale Agreement<sup>SM</sup>, dated June 20, 2025, by and between Inhibikase Therapeutics, Inc. and Jefferies LLC (incorporated by reference to Exhibit 1.2 to the Registration Statement on Form S-3 filed by the Registrant on June 20, 2025).](http://www.sec.gov/Archives/edgar/data/1750149/000119312525143738/d77556dex12.htm) |
| 5.1\* | [Opinion of Goodwin Procter LLP.](d212017dex51.htm) |
| 23.1\* | [Consent of Goodwin Procter LLP (included in Exhibit 5.1).](d212017dex51.htm) |
| 104\* | Cover Page Interactive Data File (embedded within the Inline XBRL document). |

---

**\*** Filed herewith. 

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#### 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: December 19, 2025 | INHIBIKASE THERAPEUTICS, INC. | INHIBIKASE THERAPEUTICS, INC. |
|  | By: | /s/ Mark Iwicki |
|  |  | Mark Iwicki |
|  |  | Chief Executive Officer |

---

## Exhibit 5.1

**Exhibit 5.1** 

December 19, 2025

Inhibikase Therapeutics, Inc.

1000 N. West Street, Suite 1200

Wilmington, DE 19801

Re: <u>Securities Registered under Registration Statement on Form S-3</u>

We have acted as counsel to you in connection with your filing of a Registration Statement on Form S-3 (as amended or supplemented, the "Registration Statement") filed on June 20, 2025 with the Securities and Exchange Commission (the "Commission") pursuant to the Securities Act of 1933, as amended (the "Securities Act"), relating to the registration of the offering by Inhibikase Therapeutics, Inc., a Delaware corporation (the "Company") of up to $300,000,000 of any combination of securities of the types specified therein. Reference is made to our opinion letter dated June 20, 2025 and included as Exhibit 5.1 to the Registration Statement. We are delivering this supplemental opinion letter in connection with the prospectus supplement (the "Prospectus Supplement") filed on December 19, 2025 by the Company with the Commission pursuant to Rule 424 under the Securities Act. The Prospectus Supplement relates to the offering by the Company of up to $185,000,000 in shares (the "Shares") of the Company's common stock, par value $0.001 per share ("Common Stock") covered by the Registration Statement. The Shares are being offered and sold by the sales agent named in, and pursuant to that certain Open Market Sale Agreement<sup>SM</sup> dated June 20, 2025, by and between the Company and such sales agent.

We have reviewed such documents and made such examination of law as we have deemed appropriate to give the opinion set forth below. We have relied, without independent verification, on certificates of public officials and, as to matters of fact material to the opinion set forth below, on certificates of officers of the Company.

For purposes of the opinion set forth below, we have assumed that the Shares are issued for a price per share equal to or greater than the minimum price authorized by the Company's board of directors (or a duly authorized committee of the board of directors) prior to the date hereof (the "Minimum Price") and that no event occurs that causes the number of authorized shares of Common Stock available for issuance by the Company to be less than the number of then unissued Shares that may be issued for the Minimum Price.

For purposes of the opinion set forth below, we refer to the following as "Future Approval and Issuance": (a) the approval by the Company's board of directors (or a duly authorized committee of the board of directors) of the issuance of the Shares (the "Approval") and (b) the issuance of the Shares in accordance with the Approval and the receipt by the Company of the consideration (which shall not be less than the par value of such Shares) to be paid in accordance with the Approval. 

The opinion set forth below is limited to the Delaware General Corporation Law.

------

Inhibikase Therapeutics, Inc.

December 19, 2025

Based on the foregoing, we are of the opinion that the Shares have been duly authorized and, upon Future Approval and Issuance, will be validly issued, fully paid and nonassessable.

This opinion letter and the opinions it contains shall be interpreted in accordance with the Core Opinion Principles as published in 74 *Business Lawyer* 815 (Summer 2019).

This opinion is being furnished to you for submission to the Commission as an exhibit to the Company's Current Report on Form 8-K relating to the Shares (the "Current Report"), which is incorporated by reference in the Registration Statement. We hereby consent to the filing of this opinion letter as an exhibit to the Current Report and its incorporation by reference and the reference to our firm in that report. In giving our consent, we do not admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations thereunder.

Very truly yours,

/s/ Goodwin Procter LLP

GOODWIN PROCTER LLP