| UNITED STATES |
| SECURITIES AND EXCHANGE COMMISSION |
| Washington, D.C. 20549 |
| Notice of Effectiveness |
| Effectiveness Date: |
July 1,
2026 5:30 P.M.
|
| Form: |
S-4 |
| CIK: |
0002109869 |
| Company Name: |
D. Boral ARC Merger Corp |
| File Number: |
333-297214 |
|
| CIK: |
0002110790 |
| Company Name: |
Exascale Labs Inc. |
| File Number: |
333-297214-02 |
|
| CIK: |
0002065779 |
| Company Name: |
D. Boral ARC Acquisition I Corp. |
| File Number: |
333-297214-01 |
|