# EDGAR Filing Document

**Accession Number:** 0001806095
**File Stem:** 0001398344-26-004290
**Filing Date:** 2026-3
**Character Count:** 2633
**Document Hash:** 5c8f83ef089f9f0e161cd2818eb2b351
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001398344-26-004290.hdr.sgml**: 20260304

**ACCESSION NUMBER**: 0001398344-26-004290

**CONFORMED SUBMISSION TYPE**: 497J

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260304

**DATE AS OF CHANGE**: 20260304

**EFFECTIVENESS DATE**: 20260304

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Datum One Series Trust
- **CENTRAL INDEX KEY:** 0001806095

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0331

**FILING VALUES:**
- **FORM TYPE:** 497J
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-237048
- **FILM NUMBER:** 26719165

**BUSINESS ADDRESS:**
- **STREET 1:** 333 SOUTH WABASH AVE.
- **STREET 2:** 43RD FLOOR
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60604
- **BUSINESS PHONE:** 866-494-4270

**MAIL ADDRESS:**
- **STREET 1:** 50 S. LASALLE STREET
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60603

## Series and Classes Contracts Data

### First Sentier American Listed Infrastructure Fund (Series ID: S000094758)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000263293 | Class I Shares |  |

### First Sentier Global Listed Infrastructure Fund (Series ID: S000094759)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000263294 | Class I Shares |  |

![](fp0096125-8_1.jpg)

50 S. LaSalle Street, Chicago, Illinois 60603

March 4, 2026

**<u>VIA EDGAR</u>**

Securities and Exchange Commission

Division of Investment Management

100 F Street, N.E.

Washington, D.C. 20549

Re: Datum One Series Trust <br> File Nos. 333-237048 and 811-23556

Dear Sir or Madam:

In accordance with Rule 497(j) under the Securities Act of 1933, as amended (the "Securities Act"), I hereby certify the following:

a. the form of Prospectus and Statement of Additional Information that would have been filed under paragraph (c) of Rule 497 under the Securities Act would not have differed from that contained in the most recent post-effective amendment (Post-Effective Amendment No. 27) to the Datum One Series Trust's registration statement on Form N-1A; and

b. the text of the most recent post-effective amendment (Post-Effective Amendment No. 27) to the Datum One Series Trust's registration statement was filed with the Securities and Exchange Commission via EDGAR on February 27, 2026, and became effective February 28, 2026 (Accession No. 0001398344-26-004012).

Please contact the undersigned with any questions or comments you may have on this filing.

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| |
|:---|
| Sincerely, |
| /s/ Stefania C. Suciu |
| Stefania C. Suciu |
| Secretary |
| Datum One Series Trust |

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