Company: ALGN
Filing Date: 2025-08-06
Form Type: S-8
Source: 0001097149-25-000066
Chunk: 0

Company: ALIGN TECHNOLOGY INC
Filing Date: 2025-08-06
Form: S-8
Chunk 0
---
<div align='center'>As filed with the Securities and Exchange Commission on August 6, 2025</div>

#### Registration No. 333-

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### FORM S-8

### REGISTRATION STATEMENT

#### UNDER

#### THE SECURITIES ACT OF 1933
| ALIGN TECHNOLOGY, INC.                                 |
| (Exact name of registrant as specified in its charter) |

| Delaware                                                       |     | 94-3267295                          |
| (State or other jurisdiction of incorporation or organization) |     | -I.R.S. Employer Identification No. |

<div align='center'>410 North Scottsdale Road, Suite 1300 Tempe, Arizona 85288

(Address of Principal Executive Offices) (Zip Code)</div>

#### Align Technology, Inc. 2005 Incentive Plan
<div align='center'>(Full title of the plan)</div>

#### Julie Coletti
<div align='center'>Executive Vice President, Chief Legal and Regulatory Officer</div>

#### 410 North Scottsdale Road, Suite 1300

#### Tempe, Arizona 85288
<div align='center'>(Name and address of agent for service)

(602) 742-2000

(Telephone number, including area code, of agent for service)

Copy to:</div>

#### Katharine A. Martin

#### Lauren B. Lichtblau

#### Wilson Sonsini Goodrich & Rosati, P.C.

#### 650 Page Mill Road

#### Palo Alto, California 94304
<div align='center'>(650) 493-9300</div>

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

| Large accelerated filer                                                                                                                                                                                                                                             |     | ☒ |     | Accelerated filer         |     | ☐ |
| Non-accelerated filer                                                                                                                                                                                                                                               |     | ☐ |     | Smaller reporting company |     | ☐ |
|                                                                                                                                                                                                                                                                     |     |   |     | Emerging growth company   |     | ☐ |
|