# EDGAR Filing Document

**Accession Number:** 0002034406
**File Stem:** 0001213900-25-104697
**Filing Date:** 2025-10
**Character Count:** 4027
**Document Hash:** cce7343a23f28304bb09d66d4ff1c1b1
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-25-104697.hdr.sgml**: 20251031

**ACCESSION NUMBER**: 0001213900-25-104697

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 16

**FILED AS OF DATE**: 20251031

**DATE AS OF CHANGE**: 20251031

**EFFECTIVENESS DATE**: 20251031

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Tortoise Capital Series Trust
- **CENTRAL INDEX KEY:** 0002034406

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 1130

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-281744
- **FILM NUMBER:** 251440872

**BUSINESS ADDRESS:**
- **STREET 1:** 6363 COLLEGE BOULEVARD
- **STREET 2:** SUITE 100A
- **CITY:** OVERLAND PARK
- **STATE:** KS
- **ZIP:** 66211
- **BUSINESS PHONE:** 866-362-9331

**MAIL ADDRESS:**
- **STREET 1:** 6363 COLLEGE BOULEVARD
- **STREET 2:** SUITE 100A
- **CITY:** OVERLAND PARK
- **STATE:** KS
- **ZIP:** 66211

## Series and Classes Contracts Data

### Tortoise Essential Energy Fund (Series ID: S000088745)

---

|  |  |
|:---|:---|
| Class Name                     | Class ID   |
| Tortoise Essential Energy Fund | C000255120 |

---

## Series and Classes Contracts Data

### Tortoise Essential Energy Fund (Series ID: S000088745)

| Class ID   | Class Name                     | Ticker Symbol   |
|:---|:---|:---|
| C000255120 | Tortoise Essential Energy Fund |  |

?xml version='1.0' encoding='ASCII'?

**TORTOISE CAPITAL SERIES TRUST**

**TORTOISE ESSENTIAL ENERGY FUND**

**SUPPLEMENT DATED OCTOBER 31, 2025**

**TO THE PROSPECTUS, SUMMARY PROSPECTUS AND STATEMENT OF ADDITIONAL INFORMATION DATED MARCH 28, 2025**

**Important Notice Regarding Change in Investment Policy and Name**

The Board of Trustees of Tortoise Capital Series Trust (the "Trust") has approved the following changes to the name and non-fundamental investment policy adopted pursuant to Rule 35d-1 under the Investment Company Act of 1940 of Tortoise Essential Energy Fund (the "Fund"), a series of the Trust. These changes are expected to go into effect on January 1, 2026:

● The Fund's name will be changed from Tortoise Essential Energy Fund to "Tortoise Electrification Infrastructure ETF."

● The Fund's non-fundamental investment policy to invest, under normal circumstances, at least 80% of its total assets (including assets obtained through borrowings for investment purposes) in essential energy assets will change to the following:

Under normal circumstances, the Fund invests at least 80% of its total assets (including assets obtained through borrowings for investment purposes) in electrification infrastructure assets. Electrification infrastructure assets include issuers that derive more than 50% of their revenue from power or electric energy infrastructure operations. "Electrification" refers to the increase and expansion of electric power generation and delivery. Electrification infrastructure companies use long-lived assets to provide electric power generation (including nuclear and renewable energy), transmission and distribution. Electrification infrastructure companies are engaged in the production or delivery of energy-related goods or services and include (i) companies that use a network of pipeline assets to transport, store, gather and/or process crude oil, refined petroleum products (including biodiesel and ethanol), natural gas or natural gas liquids and other low carbon fuels, (ii) companies that store, transport, distribute or treat water, waste management, electric and heating systems and (iii) companies in the renewable and clean energy sectors such as those that produce or deliver solar, wind, hydro or geo-thermal related products or services.

This change to the Fund's non-fundamental investment policy will not impact the Fund's investment objectives and is not expected to affect the Fund's fees and expenses.

PLEASE KEEP THIS WITH YOUR

PROSPECTUS, SUMMARY PROSPECTUS AND/OR STATEMENT OF ADDITIONAL INFORMATION

FOR FUTURE REFERENCE