# EDGAR Filing Document

**Accession Number:** 0001806095
**File Stem:** 0002066578-25-001206
**Filing Date:** 2025-11
**Character Count:** 14761
**Document Hash:** bc483844a714891e88b9e45acb81bab6
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0002066578-25-001206.hdr.sgml**: 20251120

**ACCESSION NUMBER**: 0002066578-25-001206

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250930

**FILED AS OF DATE**: 20251120

**DATE AS OF CHANGE**: 20251120

**PERIOD START**: 20260331

**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:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-23556
- **FILM NUMBER:** 251501403

**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

### Stewart Investors Worldwide Leaders Fund (Series ID: S000089901)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000256744 | Select Shares |  |

## Form NPORT-P: Monthly Portfolio Investments Report

### NPORT-P: Part A: General Information

**Item A.1. Information about the Registrant.**

- **a. Name of Registrant:** Datum One Series Trust

- **b. Investment Company Act file number:** 811-23556

- **c. CIK number of Registrant:** 0001806095

- **d. LEI of Registrant:** 5493003NXAX6X00BBF25

- **e. Address and telephone number of Registrant.**

  - **Street Address 1:** 50 S. LaSalle Street

  - **City:** Chicago

  - **State:** IL

  - **Foreign country:** US

  - **Zip / Postal Code:** 60603

  - **Telephone number:** 312-557-4100

**Item A.2. Information about the Series.**

- **a. Name of Series:** Stewart Investors Worldwide Leaders Fund

- **b. EDGAR series identifier (if any):** S000089901

- **c. LEI of Series:** 254900PGAHULDWM8JU25

**Item A.3. Reporting period.**

- **a. Date of fiscal year-end:** 2026-03-31

- **b. Date as of which information is reported:** 2025-09-30

**Item A.4. Final filing**

Does the Fund anticipate that this will be its final filing on Form N-PORT? **No**

### Fund Information

**Total Assets:** $4133757.36

**Total Liabilities:** $58624.80

**Net Assets:** $4075132.56

**Cash Not Reported:** $102145.42

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000256744 | 0.39%                | -0.10%               | 1.85%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $2666.78                 | $6783.95                                   |
| Month 2  | $24107.63                | $-27724.48                                 |
| Month 3  | $-112.11                 | $76241.22                                  |

### Schedule of Portfolio Investments

| Name                                         | Title                                                | Identifiers                                   | Payoff Profile   | Asset Category   | Issuer Category   | Country   |   Balance | Units   | Value (USD)   | % of Net Assets   | Maturity Date   | Coupon Type   | Annualized Rate (%)   | Restricted?   |   Fair Value Level | Lending Status   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| Deutsche Post AG                             | Deutsche Post AG NPV(REGD)                           | CUSIP: D19225107<br>LEI: 8ER8GIG7CSMVD8VUFE78 | Long             | EC               | CORP              | DE        |      1185 | NS      | $52954.51     | 1.30%             |  |  |  | No            |                  2 | On Loan: No      |
| ABB Ltd.                                     | ABB Ltd. CHF0.12 (REGD)                              | CUSIP: H0010V101<br>LEI: 5493000LKVGOO9PELI61 | Long             | EC               | CORP              | CH        |      1288 | NS      | $93203.97     | 2.29%             |  |  |  | No            |                  2 | On Loan: No      |
| Chubb Ltd.                                   | Chubb Ltd. ORD CHF24.15                              | CUSIP: H1467J104<br>LEI: E0JAN6VLUDI1HITHT809 | Long             | EC               | CORP              | CH        |       313 | NS      | $88344.25     | 2.17%             |  |  |  | No            |                  1 | On Loan: No      |
| Mahindra & Mahindra Ltd.                     | Mahindra & Mahindra Ltd. INR5                        | CUSIP: Y54164150<br>LEI: 3358003B573EV4KB4Z02 | Long             | EC               | CORP              | IN        |      7576 | NS      | $292392.92    | 7.18%             |  |  |  | No            |                  2 | On Loan: No      |
| Arista Networks Inc                          | Arista Networks Inc COM SHS                          | CUSIP: 040413205<br>LEI: 635400H1WKBLOQERUU95 | Long             | EC               | CORP              | US        |      1551 | NS      | $225996.21    | 5.55%             |  |  |  | No            |                  1 | On Loan: No      |
| Markel Group Inc                             | Markel Group Inc COM NPV                             | CUSIP: 570535104<br>LEI: 549300SCNO12JLWIK605 | Long             | EC               | CORP              | US        |        73 | NS      | $139529.28    | 3.42%             |  |  |  | No            |                  1 | On Loan: No      |
| Roper Technologies Inc                       | Roper Technologies Inc COM USD0.01                   | CUSIP: 776696106<br>LEI: 54930003T4SXCIWVXY35 | Long             | EC               | CORP              | US        |       219 | NS      | $109213.11    | 2.68%             |  |  |  | No            |                  1 | On Loan: No      |
| Wabtec Corp                                  | Wabtec Corp COM USD0.01                              | CUSIP: 929740108<br>LEI: 06BTX5UWZD0GQ5N5Y745 | Long             | EC               | CORP              | US        |       330 | NS      | $66155.10     | 1.62%             |  |  |  | No            |                  1 | On Loan: No      |
| Linde PLC                                    | Linde PLC COM EUR0.001                               | CUSIP: G54950103<br>LEI: 5299003QR1WT0EF88V51 | Long             | EC               | CORP              | IE        |       243 | NS      | $115425.00    | 2.83%             |  |  |  | No            |                  1 | On Loan: No      |
| Old Dominion Freight Line Inc.               | Old Dominion Freight Line Inc. COM USD0.10           | CUSIP: 679580100<br>LEI: 5299009TWK32WE417T96 | Long             | EC               | CORP              | US        |       406 | NS      | $57156.68     | 1.40%             |  |  |  | No            |                  1 | On Loan: No      |
| Fortinet Inc                                 | Fortinet Inc COM USD0.001                            | CUSIP: 34959E109<br>LEI: 549300O0QJWDBAS0QX03 | Long             | EC               | CORP              | US        |      2759 | NS      | $231976.72    | 5.69%             |  |  |  | No            |                  1 | On Loan: No      |
| HDFC Bank Ltd.                               | HDFC Bank Ltd. INR1                                  | CUSIP: Y3119P190<br>LEI: 335800ZQ6I4E2JXENC50 | Long             | EC               | CORP              | IN        |     17349 | NS      | $185924.14    | 4.56%             |  |  |  | No            |                  2 | On Loan: No      |
| Weg SA                                       | Weg SA COM NPV                                       | CUSIP: P9832B129<br>LEI: 254900NKQV127YFRO022 | Long             | EC               | CORP              | BR        |     23300 | NS      | $160185.45    | 3.93%             |  |  |  | No            |                  1 | On Loan: No      |
| Techtronic Industries Co. Ltd.               | Techtronic Industries Co. Ltd. NPV                   | CUSIP: Y8563B159<br>LEI: 549300HZW2SBE758OK89 | Long             | EC               | CORP              | HK        |      4500 | NS      | $57524.52     | 1.41%             |  |  |  | No            |                  2 | On Loan: No      |
| Singapore Telecommunications Ltd.            | Singapore Telecommunications Ltd. NPV(BOARD LOT 100) | CUSIP: Y79985209<br>LEI: 2549003XJKIQO8YDYD89 | Long             | EC               | CORP              | SG        |     20900 | NS      | $66818.73     | 1.64%             |  |  |  | No            |                  2 | On Loan: No      |
| Samsung Electronics Co Ltd.                  | Samsung Electronics Co Ltd. KRW100                   | CUSIP: Y74718100<br>LEI: 9884007ER46L6N7EI764 | Long             | EC               | CORP              | KR        |      3199 | NS      | $191781.10    | 4.71%             |  |  |  | No            |                  2 | On Loan: No      |
| Sysmex Corp.                                 | Sysmex Corp. NPV                                     | CUSIP: J7864H102<br>LEI: 5299001ZO4CKWACMZI55 | Long             | EC               | CORP              | JP        |      5100 | NS      | $63048.06     | 1.55%             |  |  |  | No            |                  2 | On Loan: No      |
| Taiwan Semiconductor Manufacturing Co., Ltd. | Taiwan Semiconductor Manufacturing Co., Ltd. TWD10   | CUSIP: Y84629107<br>LEI: 549300KB6NK5SBD14S87 | Long             | EC               | CORP              | TW        |      2000 | NS      | $86875.65     | 2.13%             |  |  |  | No            |                  2 | On Loan: No      |
| Knorr-Bremse AG                              | Knorr-Bremse AG NPV                                  | CUSIP: D4S43E114<br>LEI: 5299001GRRO0Z25YZT52 | Long             | EC               | CORP              | DE        |      1162 | NS      | $109331.15    | 2.68%             |  |  |  | Yes           |                  2 | On Loan: No      |
| Alibaba Group Holding Ltd.                   | Alibaba Group Holding Ltd. USD0.000003125            | CUSIP: G01719114<br>LEI: 5493001NTNQJDH60PM02 | Long             | EC               | CORP              | KY        |      7000 | NS      | $156548.81    | 3.84%             |  |  |  | No            |                  2 | On Loan: No      |
| Atlas Copco AB                               | Atlas Copco AB SER'A'NPV                             | CUSIP: W1R924252<br>LEI: 213800T8PC8Q4FYJZR07 | Long             | EC               | CORP              | SE        |      5532 | NS      | $93811.57     | 2.30%             |  |  |  | No            |                  2 | On Loan: No      |
| Trip.com Group Ltd.                          | Trip.com Group Ltd. USD0.00125                       | CUSIP: G9066F101<br>LEI: 2549004RMYDSRQL4KW41 | Long             | EC               | CORP              | KY        |       700 | NS      | $53086.29     | 1.30%             |  |  |  | No            |                  2 | On Loan: No      |
| Carlisle Companies Inc.                      | Carlisle Companies Inc. COM USD1                     | CUSIP: 142339100<br>LEI: XR64VGX1ZPX6G7ZN7Z11 | Long             | EC               | CORP              | US        |       196 | NS      | $64476.16     | 1.58%             |  |  |  | No            |                  1 | On Loan: No      |
| Grainger W W Inc                             | Grainger W W Inc COM USD0.50                         | CUSIP: 384802104<br>LEI: 549300TWZSP6O1IH2V34 | Long             | EC               | CORP              | US        |        62 | NS      | $59083.52     | 1.45%             |  |  |  | No            |                  1 | On Loan: No      |
| KLA Corp.                                    | KLA Corp. COM USD0.001                               | CUSIP: 482480100<br>LEI: 549300H0BF5JCG96TJ81 | Long             | EC               | CORP              | US        |       135 | NS      | $145611.00    | 3.57%             |  |  |  | No            |                  1 | On Loan: No      |
| Lincoln Electric Holdings Inc.               | Lincoln Electric Holdings Inc. COM NPV               | CUSIP: 533900106<br>LEI: BIMGBY40SIN95O01BN93 | Long             | EC               | CORP              | US        |       360 | NS      | $84898.80     | 2.08%             |  |  |  | No            |                  1 | On Loan: No      |
| NVR Inc                                      | NVR Inc COM USD0.01                                  | CUSIP: 62944T105<br>LEI: 529900RWXR4JI3JYTV70 | Long             | EC               | CORP              | US        |        10 | NS      | $80346.60     | 1.97%             |  |  |  | No            |                  1 | On Loan: No      |
| Brown & Brown Inc                            | Brown & Brown Inc COM USD0.10                        | CUSIP: 115236101<br>LEI: 549300PC8KTJ71XKFY89 | Long             | EC               | CORP              | US        |      1407 | NS      | $131962.53    | 3.24%             |  |  |  | No            |                  1 | On Loan: No      |
| Synopsys Inc                                 | Synopsys Inc COM USD0.01                             | CUSIP: 871607107<br>LEI: QG7T915N9S0NY5UKNE63 | Long             | EC               | CORP              | US        |       236 | NS      | $116440.04    | 2.86%             |  |  |  | No            |                  1 | On Loan: No      |
| Texas Instruments Inc.                       | Texas Instruments Inc. COM USD1.00                   | CUSIP: 882508104<br>LEI: WDJNR2L6D8RWOEB8T652 | Long             | EC               | CORP              | US        |       936 | NS      | $171971.28    | 4.22%             |  |  |  | No            |                  1 | On Loan: No      |
| Watsco Inc                                   | Watsco Inc COM USD0.50                               | CUSIP: 942622200<br>LEI: 549300F1Y3LN5BX5WN75 | Long             | EC               | CORP              | US        |       478 | NS      | $193255.40    | 4.74%             |  |  |  | No            |                  1 | On Loan: No      |
| BioMerieux SA                                | BioMerieux SA NPV                                    | CUSIP: F1149Y232<br>LEI: 549300AK8Y0LBIQ4T071 | Long             | EC               | CORP              | FR        |      1584 | NS      | $212602.09    | 5.22%             |  |  |  | No            |                  2 | On Loan: No      |

### Signature

**Date Signed:** 2025-10-27

**Name of Applicant:** Datum One Series Trust

**Signature:** Tracy L. Dotolo

**Name of Signer:** Tracy L. Dotolo

**Title:** Treasurer