diff --git a/casparser/process/cas_detailed.py b/casparser/process/cas_detailed.py
index e496a97..98a9ac9 100644
--- a/casparser/process/cas_detailed.py
+++ b/casparser/process/cas_detailed.py
@@ -35,6 +35,7 @@
     TRANSACTION_RE2,
     TRANSACTION_RE3,
     TRANSACTION_RE4,
+    TRANSACTION_RE5,
     VALUATION_RE,
 )
 from .utils import isin_search
@@ -128,7 +129,7 @@ def get_parsed_scheme_name(scheme) -> str:
     return re.sub(r"[^a-zA-Z0-9_)]+$", "", scheme).strip()
 
 
-def parse_transaction(line) -> Optional[ParsedTransaction]:
+def parse_transaction(line, pending_description: Optional[str] = None) -> Optional[ParsedTransaction]:
     for regex in (TRANSACTION_RE1, TRANSACTION_RE2, TRANSACTION_RE3, TRANSACTION_RE4):
         if m := re.search(regex, line, re.DOTALL | re.MULTILINE | re.I):
             groups = m.groups()
@@ -149,6 +150,12 @@ def parse_transaction(line) -> Optional[ParsedTransaction]:
             if date is not None:
                 return ParsedTransaction(date, description, amount, units, nav, balance)
 
+    # Try TRANSACTION_RE5 for first transaction without description
+    # (description is on previous line with "Opening Unit Balance")
+    if pending_description and (m := re.search(TRANSACTION_RE5, line, re.DOTALL | re.MULTILINE | re.I)):
+        date, amount, units, nav, balance = m.groups()
+        return ParsedTransaction(date, pending_description, amount, units, nav, balance)
+
 
 def process_detailed_text(text):
     """
@@ -163,6 +170,7 @@ def process_detailed_text(text):
     current_folio = None
     current_amc = None
     curr_scheme_data: Optional[Scheme] = None
+    pending_first_txn_desc: Optional[str] = None  # For first transaction whose description is on Opening Unit Balance line
     lines = text.split("\u2029")
     for idx, line in enumerate(lines):
         # Parse schemes with long names (single line) effectively pushing
@@ -237,7 +245,11 @@ def process_detailed_text(text):
         if m := re.search(NOMINEE_RE, line, re.I | re.DOTALL):
             curr_scheme_data.nominees.extend([x.strip() for x in m.groups() if x.strip()])
         if m := re.search(OPEN_UNITS_RE, line):
-            curr_scheme_data.open = Decimal(m.group(1).replace(",", "_"))
+            # group(1) is optional description before "Opening Unit Balance" (for first transaction)
+            # group(2) is the opening unit balance value
+            if m.group(1):
+                pending_first_txn_desc = m.group(1).strip()
+            curr_scheme_data.open = Decimal(m.group(2).replace(",", "_"))
             curr_scheme_data.close_calculated = curr_scheme_data.open
             continue
         if m := re.search(CLOSE_UNITS_RE, line):
@@ -255,7 +267,7 @@ def process_detailed_text(text):
         if m := re.search(DESCRIPTION_TAIL_RE, line):
             description_tail = m.group(1).strip()
             line = line.replace(m.group(1), "")
-        if parsed_txn := parse_transaction(line):
+        if parsed_txn := parse_transaction(line, pending_first_txn_desc):
             date = date_parser.parse(parsed_txn.date).date()
             desc = parsed_txn.description.strip()
             if description_tail != "":
@@ -279,6 +291,8 @@ def process_detailed_text(text):
                     dividend_rate=dividend_rate,
                 )
             )
+            # Clear pending description after first transaction is parsed
+            pending_first_txn_desc = None
     if curr_scheme_data:
         folios[current_folio].schemes.append(curr_scheme_data)
     return ProcessedCASData(
diff --git a/casparser/process/regex.py b/casparser/process/regex.py
index 373611c..4528699 100644
--- a/casparser/process/regex.py
+++ b/casparser/process/regex.py
@@ -29,7 +29,8 @@
 SCHEME_KV_RE = r"""(\w+)\s*:\s*([-\w]+)"""
 
 REGISTRAR_RE = r"^\s*Registrar\s*:\s*(.*)\s*$"
-OPEN_UNITS_RE = r"Opening\s+Unit\s+Balance.+?([\d,.]+)"
+# Captures optional description before "Opening Unit Balance" (for first transaction)
+OPEN_UNITS_RE = r"(?:(.+?)\t\t)?Opening\s+Unit\s+Balance.+?([\d,.]+)"
 CLOSE_UNITS_RE = r"Closing\s+Unit\s+Balance.+?([\d,.]+)"
 COST_RE = r"Total\s+Cost\s+Value\s*:.+?[INR\s]*([\d,.]+)"
 VALUATION_RE = (
@@ -45,6 +46,8 @@
 TRANSACTION_RE3 = rf"{date_re}\t\t([^0-9].*)\t\t{amt_re}\t\t{amt_re}(?:\t\t{amt_re}\t\t{amt_re})*"
 # Tax transactions
 TRANSACTION_RE4 = rf"{date_re}\t\t([^0-9].*)\t\t{amt_re}(?:\t\t{amt_re}\t\t{amt_re}\t\t{amt_re})*"
+# First transaction without description (description is on previous line with Opening Unit Balance)
+TRANSACTION_RE5 = rf"{date_re}\t\t{amt_re}\t\t{amt_re}\t\t{amt_re}\t\t{amt_re}"
 DESCRIPTION_TAIL_RE = r"(\n.+?)(\t\t|$)"
 DIVIDEND_RE = r"(?:div\.|dividend|idcw).+?(reinvest)*.*?@\s*Rs\.\s*([\d\.]+)(?:\s+per\s+unit)?"
 SCHEME_TAIL_RE = r"(\n.+?)(?:\t\t|$)"