Company: TDY
Filing Date: 2025-05-05
Form Type: 8-K/A
Source: 0001094285-25-000111
Chunk: 0

Company: TELEDYNE TECHNOLOGIES INC
Filing Date: 2025-05-05
Form: 8-K/A
Chunk 0
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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### FORM 8-K/A
<div align='center'>(Amendment No. 1)</div>

### CURRENT REPORT

#### PURSUANT TO SECTION 13 OR SECTION 15(d) OF THE

#### SECURITIES EXCHANGE ACT OF 1934
<div align='center'>Date of Report (Date of earliest event reported): April 28, 2025</div>

#### Teledyne Technologies Incorporated
<div align='center'>(Exact name of registrant as specified in its charter)</div>

| Delaware                     |     | 1-15295                                 |     | 25-1843385         |
| (State or other jurisdiction 
 of incorporation)            |     | -Commission                             
 File Number                             |     | -I.R.S. Employer   
 Identification No. |
|                              |     | 1049 Camino Dos Rios                    
 Thousand Oaks,California                |     | 91360-2362         |
|                              |     | -Address of principal executive offices |     | -Zip Code          |

<div align='center'>Registrant’s telephone number, including area code: ( 805) 373-4545</div>

#### Not Applicable
<div align='center'>(Former name or former address, if changed since last report)</div>

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:

| ☐ |     | 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 on each exchange on which registered |
| Common Stock, par value $.01 per share |     | TDY