diff --git a/src/scembed/aggregation.py b/src/scembed/aggregation.py
index c9356fb..e34847a 100644
--- a/src/scembed/aggregation.py
+++ b/src/scembed/aggregation.py
@@ -4,6 +4,7 @@
 from dataclasses import fields
 from pathlib import Path
 from tempfile import TemporaryDirectory
+from typing import Union
 
 import numpy as np
 import pandas as pd
@@ -16,6 +17,10 @@
 from scembed.logging import logger
 from scembed.utils import _download_artifact_by_run_id
 
+# Allowed scalar types for filtering
+AllowedScalar = Union[int, float, str, bool]
+AllowedFilterValue = Union[AllowedScalar, list[AllowedScalar]]
+
 
 class scIBAggregator:
     """Aggregator for WandB sweep results with scIB metrics visualization.
@@ -155,7 +160,60 @@ def _unwrap_wandb_config(config_dict: dict) -> dict:
         # Config is already at the top level
         return config_dict
 
-    def fetch_runs(self) -> None:
+    def _filter_params(self, target_key, target_value) -> None:
+        """Filter runs to match certain parameter criteria."""
+        keep_runs = []
+        discard_runs = []
+
+        for idx, row in self.raw_df.iterrows():
+            # Get the config. Missing config runs will be filtered out later in _process_runs()
+            config = row.get("config")
+            if config is None or not isinstance(config, dict):
+                continue
+
+            # Get the value of the target key in the config. Can be a dict with 'value' key or direct value
+            # Keeping this here for safety
+            param_value = config.get(target_key, None)
+            if isinstance(param_value, dict):
+                param_value = param_value["value"]
+
+            if param_value is None:
+                if self.filter_allow_none:
+                    keep_runs.append(idx)
+                else:
+                    discard_runs.append(idx)
+                continue
+
+            # If the desired target_value is not a list, just check for a match
+            if not isinstance(target_value, list):
+                if param_value == target_value:
+                    keep_runs.append(idx)
+                else:
+                    discard_runs.append(idx)
+            # If the desired target_value is a list, check if param_value is in that list
+            else:
+                if any([param_value == x for x in target_value]):
+                    keep_runs.append(idx)
+                else:
+                    discard_runs.append(idx)
+
+        if discard_runs:
+            logger.info(
+                "Masked %d runs not matching %s=%s. %d runs remain.",
+                len(discard_runs),
+                target_key,
+                target_value,
+                len(keep_runs),
+            )
+
+        self.raw_df = self.raw_df.loc[keep_runs].copy()
+
+        if self.raw_df.empty:
+            logger.warning("All runs were masked, please relax the filtering constraints.")
+
+    def fetch_runs(
+        self, filter_params: dict[str, AllowedFilterValue] | None = None, filter_allow_none: bool = True
+    ) -> None:
         """Fetch runs from WandB and process into internal storage."""
         logger.info("Fetching runs from %s/%s...", self.entity, self.project)
 
@@ -168,6 +226,10 @@ def fetch_runs(self) -> None:
         self.missing_metrics_runs = []
         self.available_scib_metrics = set()
 
+        # Set filtering options
+        self.filter_params = filter_params
+        self.filter_allow_none = filter_allow_none
+
         # Initialize WandB API
         api = wandb.Api()
 
@@ -187,6 +249,11 @@ def fetch_runs(self) -> None:
 
         logger.info("Fetched %d runs", self.n_runs_fetched)
 
+        # Filter the data
+        if self.filter_params is not None:
+            for target_key, target_value in self.filter_params.items():
+                self._filter_params(target_key=target_key, target_value=target_value)
+
         # Process the data
         self._process_runs()