diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5a5846c95..98e4a9380 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Changed
+
+- Removed the deprecated `firstBuyDate` from the endpoint `GET api/v1/portfolio/holding/:dataSource/:symbol`
+
 ## 2.232.0 - 2026-01-19
 
 ### Added
diff --git a/apps/api/src/app/portfolio/portfolio.service.ts b/apps/api/src/app/portfolio/portfolio.service.ts
index 9a6f6af62..6ffd9fe0b 100644
--- a/apps/api/src/app/portfolio/portfolio.service.ts
+++ b/apps/api/src/app/portfolio/portfolio.service.ts
@@ -914,7 +914,6 @@ export class PortfolioService {
       );
 
     return {
-      firstBuyDate,
       marketPrice,
       marketPriceMax,
       marketPriceMin,
diff --git a/libs/common/src/lib/interfaces/responses/portfolio-holding-response.interface.ts b/libs/common/src/lib/interfaces/responses/portfolio-holding-response.interface.ts
index 1d1ac1b11..76bc7dc02 100644
--- a/libs/common/src/lib/interfaces/responses/portfolio-holding-response.interface.ts
+++ b/libs/common/src/lib/interfaces/responses/portfolio-holding-response.interface.ts
@@ -16,10 +16,6 @@ export interface PortfolioHoldingResponse {
   dividendYieldPercent: number;
   dividendYieldPercentWithCurrencyEffect: number;
   feeInBaseCurrency: number;
-
-  /** @deprecated use dateOfFirstActivity */
-  firstBuyDate: string;
-
   grossPerformance: number;
   grossPerformancePercent: number;
   grossPerformancePercentWithCurrencyEffect: number;