# EDGAR Filing Document

**Accession Number:** 0000941568
**File Stem:** 0001104659-26-020416
**Filing Date:** 2026-2
**Character Count:** 6547
**Document Hash:** 83c4d2c8cc8d04f3a762477b5fc16c91
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-020416.hdr.sgml**: 20260226

**ACCESSION NUMBER**: 0001104659-26-020416

**CONFORMED SUBMISSION TYPE**: 485BXT

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260226

**DATE AS OF CHANGE**: 20260226

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** CREDIT SUISSE TRUST
- **CENTRAL INDEX KEY:** 0000941568

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 485BXT
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-07261
- **FILM NUMBER:** 26686315

**BUSINESS ADDRESS:**
- **STREET 1:** ELEVEN MADISON AVENUE
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10010
- **BUSINESS PHONE:** 212-325-2000

**MAIL ADDRESS:**
- **STREET 1:** ELEVEN MADISON AVENUE
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10010

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** WARBURG PINCUS TRUST
- **DATE OF NAME CHANGE:** 19950315
**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** CREDIT SUISSE TRUST
- **CENTRAL INDEX KEY:** 0000941568

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 485BXT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-58125
- **FILM NUMBER:** 26686314

**BUSINESS ADDRESS:**
- **STREET 1:** ELEVEN MADISON AVENUE
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10010
- **BUSINESS PHONE:** 212-325-2000

**MAIL ADDRESS:**
- **STREET 1:** ELEVEN MADISON AVENUE
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10010

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** WARBURG PINCUS TRUST
- **DATE OF NAME CHANGE:** 19950315

## Series and Classes Contracts Data

### Commodity Return Strategy Portfolio (Series ID: S000011252)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000031307 | Class 1      | CCRSX           |
| C000218423 | Class 2      | CCRRX           |

**As filed with the Securities and Exchange Commission** 

**on February 26, 2026**

**Securities Act File No. 33-58125** 

**Investment Company Act File No. 811-07261**

**U.S. SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**FORM N-1A** 

---

| | |
|:---|:---|
| REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 | ☒ |
| Pre-Effective Amendment No. | ☐ |
| Post-Effective Amendment No. 65 | ☒ |
| and/or |  |
| REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940 | ☒ |
| Amendment No. 66 | ☒ |
| (Check appropriate box or boxes) |  |

---

**Credit Suisse Trust**

(Exact Name of Registrant Specified in Charter)

---

| | |
|:---|:---|
| &nbsp;&nbsp;**1285 Avenue of the Americas, New York, New York** | &nbsp;&nbsp;**10019** |
| &nbsp;&nbsp;(Address of Principal Executive Offices) | &nbsp;&nbsp;(Zip Code) |

---

Registrant's Telephone Number, Including Area Code: (212) 325-2000

**Karen Regan** 

**Credit Suisse Trust**

**1285 Avenue of the Americas**

**New York, New York 10019**

(Name and Address of Agent for Service)

Copies to*:* 

---

| | |
|:---|:---|
| &nbsp;&nbsp; **Justin L. Browder<br> Simpson Thacher & Bartlett LLP<br> 900 G Street, N.W.**<br> **Washington, DC 20001**<br>| &nbsp;&nbsp; **Bissie K. Bonner**<br> **Simpson Thacher & Bartlett LLP**<br> **425 Lexington Avenue<br> New York, New York 10017** |

---

Approximate date of proposed public offering:

It is proposed that this filing will become effective (check appropriate box)

☐ Immediately upon filing pursuant to paragraph (b)

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;☒ on March 27, 2026 pursuant to paragraph (b)

☐ 60 days after filing pursuant to paragraph (a)(1)

☐ on (date) pursuant to paragraph (a)(1)

☐ 75 days after filing pursuant to paragraph (a)(2), or

☐ on (date) pursuant to paragraph (a)(2) of Rule 485

If appropriate, check the following box:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;☒ This post-effective amendment designates a new effective date
for a previously filed post-effective amendment

**EXPLANATORY NOTE**

This Post-Effective Amendment No. 65 under the Securities Act of 1933, as amended (the "Securities Act") (Amendment No. 66 under the Investment Company Act of 1940, as amended (the "1940 Act")) to the registration statement on Form N-1A (the "Registration Statement") of Credit Suisse Trust (the "Registrant") is being filed pursuant to paragraph (b)(1)(iii) of Rule 485 under the Securities Act solely for the purpose of delaying, until March 27, 2026, the effectiveness of the registration statement for Commodity Return Strategy Portfolio, filed in Post-Effective Amendment No. 63 on December 3, 2025, pursuant to paragraph (a) of Rule 485 under the Securities Act.

This Post-Effective Amendment No. 65 incorporates by reference the information contained in Parts A, B and C of Post-Effective Amendment No. 63 to the Registrant's Registration Statement.

**SIGNATURES**

Pursuant to the requirements of the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all the requirements of effectiveness of this Registration Statement under Rule 485(b) of the Securities Act and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York, New York, on the 26th day of February, 2026.

---

| | |
|:---|:---|
| CREDIT SUISSE TRUST | CREDIT SUISSE TRUST |
| By | /s/ Omar Tariq |
|  | Omar Tariq |
|  | Chief Executive Officer and President |

---

Pursuant to the requirements of the Securities Act of 1933, the Registration Statement has been signed below by the following persons in the capacities and on the dates indicated.

---

| | | |
|:---|:---|:---|
| **SIGNATURE** | **TITLE** | **DATE** |
| /s/ Omar Tariq | Chief Executive Officer and President | February 26, 2026 |
| Omar Tariq |  |  |
| /s/ Rose Ann Bubloski | Chief Financial Officer and Treasurer | February 26, 2026 |
| Rose Ann Bubloski |  |  |
| /s/ Laura A. DeFelice\* | Chair of the Board | February 26, 2026 |
| Laura A. DeFelice |  |  |
| /s/ Mahendra R. Gupta\* | Trustee | February 26, 2026 |
| Mahendra R. Gupta |  |  |
| /s/ Samantha Kappagoda\* | Trustee | February 26, 2026 |
| Samantha Kappagoda |  |  |
| /s/ John Popp\* | Trustee | February 26, 2026 |
| John Popp |  |  |
| /s/ Lee M. Shaiman\* | Trustee | February 26, 2026 |
| Lee M. Shaiman |  |  |

---

---

| | |
|:---|:---|
| \*By: | /s/ Karen Regan |
|  | Karen Regan, as Attorney-in-Fact |

---