diff --git a/massive/rest/models/financials.py b/massive/rest/models/financials.py
index a2989f15..feda1341 100644
--- a/massive/rest/models/financials.py
+++ b/massive/rest/models/financials.py
@@ -922,6 +922,60 @@ def from_dict(d):
         )
 
 
+@modelclass
+@dataclass
+class Filing13F:
+    """SEC Form 13F filings data showing institutional investment manager holdings."""
+
+    accession_number: Optional[str] = None
+    cusip: Optional[str] = None
+    file_number: Optional[str] = None
+    filer_cik: Optional[str] = None
+    filing_date: Optional[str] = None
+    filing_url: Optional[str] = None
+    film_number: Optional[str] = None
+    form_type: Optional[str] = None
+    investment_discretion: Optional[str] = None
+    issuer_name: Optional[str] = None
+    market_value: Optional[int] = None
+    other_managers: Optional[List[str]] = None
+    period: Optional[str] = None
+    put_call: Optional[str] = None
+    shares_or_principal_amount: Optional[int] = None
+    shares_or_principal_type: Optional[str] = None
+    title_of_class: Optional[str] = None
+    voting_authority_none: Optional[int] = None
+    voting_authority_shared: Optional[int] = None
+    voting_authority_sole: Optional[int] = None
+
+    @staticmethod
+    def from_dict(d: Optional[Dict[str, Any]]) -> "Filing13F":
+        if not d:
+            return Filing13F()
+        return Filing13F(
+            accession_number=d.get("accession_number"),
+            cusip=d.get("cusip"),
+            file_number=d.get("file_number"),
+            filer_cik=d.get("filer_cik"),
+            filing_date=d.get("filing_date"),
+            filing_url=d.get("filing_url"),
+            film_number=d.get("film_number"),
+            form_type=d.get("form_type"),
+            investment_discretion=d.get("investment_discretion"),
+            issuer_name=d.get("issuer_name"),
+            market_value=d.get("market_value"),
+            other_managers=d.get("other_managers"),
+            period=d.get("period"),
+            put_call=d.get("put_call"),
+            shares_or_principal_amount=d.get("shares_or_principal_amount"),
+            shares_or_principal_type=d.get("shares_or_principal_type"),
+            title_of_class=d.get("title_of_class"),
+            voting_authority_none=d.get("voting_authority_none"),
+            voting_authority_shared=d.get("voting_authority_shared"),
+            voting_authority_sole=d.get("voting_authority_sole"),
+        )
+
+
 @modelclass
 class FilingSection:
     """SEC document text section from a 10-K/10-Q (raw text content)."""
@@ -947,6 +1001,206 @@ def from_dict(d):
         )
 
 
+@modelclass
+@dataclass
+class FilingFootnote:
+    """Footnote from SEC Form 3/4 filings."""
+
+    id: Optional[str] = None
+    description: Optional[str] = None
+
+    @staticmethod
+    def from_dict(d: Optional[Dict[str, Any]]) -> "FilingFootnote":
+        if not d:
+            return FilingFootnote()
+        return FilingFootnote(
+            id=d.get("id"),
+            description=d.get("description"),
+        )
+
+
+@modelclass
+@dataclass
+class FilingForm3:
+    """SEC Form 3 filings reporting initial statements of beneficial ownership of securities.
+    Filed by corporate insiders (directors, officers, and 10%+ shareholders) when they first acquire a position.
+    """
+
+    accession_number: Optional[str] = None
+    aff_10b5_one: Optional[bool] = None
+    date_of_original_submission: Optional[str] = None
+    direct_or_indirect: Optional[str] = None
+    exercise_date: Optional[str] = None
+    exercise_price: Optional[float] = None
+    filing_date: Optional[str] = None
+    filing_url: Optional[str] = None
+    footnotes: Optional[List[FilingFootnote]] = None
+    form_type: Optional[str] = None
+    is_director: Optional[bool] = None
+    is_officer: Optional[bool] = None
+    is_other: Optional[bool] = None
+    is_ten_percent_owner: Optional[bool] = None
+    issuer_cik: Optional[str] = None
+    issuer_name: Optional[str] = None
+    nature_of_ownership: Optional[str] = None
+    not_subject_to_section_16: Optional[bool] = None
+    officer_title: Optional[str] = None
+    owner_cik: Optional[str] = None
+    owner_name: Optional[str] = None
+    period_of_report: Optional[str] = None
+    remarks: Optional[str] = None
+    security_title: Optional[str] = None
+    security_type: Optional[str] = None
+    shares_owned: Optional[float] = None
+    tickers: Optional[List[str]] = None
+    underlying_security_shares: Optional[float] = None
+    underlying_security_title: Optional[str] = None
+
+    @staticmethod
+    def from_dict(d: Optional[Dict[str, Any]]) -> "FilingForm3":
+        if not d:
+            return FilingForm3()
+        footnotes = d.get("footnotes")
+        return FilingForm3(
+            accession_number=d.get("accession_number"),
+            aff_10b5_one=d.get("aff_10b5_one"),
+            date_of_original_submission=d.get("date_of_original_submission"),
+            direct_or_indirect=d.get("direct_or_indirect"),
+            exercise_date=d.get("exercise_date"),
+            exercise_price=d.get("exercise_price"),
+            filing_date=d.get("filing_date"),
+            filing_url=d.get("filing_url"),
+            footnotes=(
+                [FilingFootnote.from_dict(f) for f in footnotes]
+                if footnotes is not None
+                else None
+            ),
+            form_type=d.get("form_type"),
+            is_director=d.get("is_director"),
+            is_officer=d.get("is_officer"),
+            is_other=d.get("is_other"),
+            is_ten_percent_owner=d.get("is_ten_percent_owner"),
+            issuer_cik=d.get("issuer_cik"),
+            issuer_name=d.get("issuer_name"),
+            nature_of_ownership=d.get("nature_of_ownership"),
+            not_subject_to_section_16=d.get("not_subject_to_section_16"),
+            officer_title=d.get("officer_title"),
+            owner_cik=d.get("owner_cik"),
+            owner_name=d.get("owner_name"),
+            period_of_report=d.get("period_of_report"),
+            remarks=d.get("remarks"),
+            security_title=d.get("security_title"),
+            security_type=d.get("security_type"),
+            shares_owned=d.get("shares_owned"),
+            tickers=d.get("tickers"),
+            underlying_security_shares=d.get("underlying_security_shares"),
+            underlying_security_title=d.get("underlying_security_title"),
+        )
+
+
+@modelclass
+@dataclass
+class FilingForm4:
+    """SEC Form 4 filings reporting changes in beneficial ownership of securities.
+    Filed by corporate insiders (directors, officers, and 10%+ shareholders) within two business days of a transaction.
+    """
+
+    accession_number: Optional[str] = None
+    aff_10b5_one: Optional[bool] = None
+    date_of_original_submission: Optional[str] = None
+    deemed_execution_date: Optional[str] = None
+    direct_or_indirect: Optional[str] = None
+    equity_swap_involved: Optional[bool] = None
+    exercise_date: Optional[str] = None
+    exercise_price: Optional[float] = None
+    expiration_date: Optional[str] = None
+    filing_date: Optional[str] = None
+    filing_url: Optional[str] = None
+    footnotes: Optional[List[FilingFootnote]] = None
+    form_type: Optional[str] = None
+    is_director: Optional[bool] = None
+    is_officer: Optional[bool] = None
+    is_other: Optional[bool] = None
+    is_ten_percent_owner: Optional[bool] = None
+    issuer_cik: Optional[str] = None
+    issuer_name: Optional[str] = None
+    nature_of_ownership: Optional[str] = None
+    not_subject_to_section_16: Optional[bool] = None
+    officer_title: Optional[str] = None
+    owner_cik: Optional[str] = None
+    owner_name: Optional[str] = None
+    period_of_report: Optional[str] = None
+    record_type: Optional[str] = None
+    remarks: Optional[str] = None
+    security_title: Optional[str] = None
+    security_type: Optional[str] = None
+    shares_owned_following_transaction: Optional[float] = None
+    tickers: Optional[List[str]] = None
+    transaction_acquired_disposed: Optional[str] = None
+    transaction_code: Optional[str] = None
+    transaction_date: Optional[str] = None
+    transaction_price_per_share: Optional[float] = None
+    transaction_shares: Optional[float] = None
+    transaction_timeliness: Optional[str] = None
+    transaction_value: Optional[float] = None
+    underlying_security_shares: Optional[float] = None
+    underlying_security_title: Optional[str] = None
+
+    @staticmethod
+    def from_dict(d: Optional[Dict[str, Any]]) -> "FilingForm4":
+        if not d:
+            return FilingForm4()
+        footnotes = d.get("footnotes")
+        return FilingForm4(
+            accession_number=d.get("accession_number"),
+            aff_10b5_one=d.get("aff_10b5_one"),
+            date_of_original_submission=d.get("date_of_original_submission"),
+            deemed_execution_date=d.get("deemed_execution_date"),
+            direct_or_indirect=d.get("direct_or_indirect"),
+            equity_swap_involved=d.get("equity_swap_involved"),
+            exercise_date=d.get("exercise_date"),
+            exercise_price=d.get("exercise_price"),
+            expiration_date=d.get("expiration_date"),
+            filing_date=d.get("filing_date"),
+            filing_url=d.get("filing_url"),
+            footnotes=(
+                [FilingFootnote.from_dict(f) for f in footnotes]
+                if footnotes is not None
+                else None
+            ),
+            form_type=d.get("form_type"),
+            is_director=d.get("is_director"),
+            is_officer=d.get("is_officer"),
+            is_other=d.get("is_other"),
+            is_ten_percent_owner=d.get("is_ten_percent_owner"),
+            issuer_cik=d.get("issuer_cik"),
+            issuer_name=d.get("issuer_name"),
+            nature_of_ownership=d.get("nature_of_ownership"),
+            not_subject_to_section_16=d.get("not_subject_to_section_16"),
+            officer_title=d.get("officer_title"),
+            owner_cik=d.get("owner_cik"),
+            owner_name=d.get("owner_name"),
+            period_of_report=d.get("period_of_report"),
+            record_type=d.get("record_type"),
+            remarks=d.get("remarks"),
+            security_title=d.get("security_title"),
+            security_type=d.get("security_type"),
+            shares_owned_following_transaction=d.get(
+                "shares_owned_following_transaction"
+            ),
+            tickers=d.get("tickers"),
+            transaction_acquired_disposed=d.get("transaction_acquired_disposed"),
+            transaction_code=d.get("transaction_code"),
+            transaction_date=d.get("transaction_date"),
+            transaction_price_per_share=d.get("transaction_price_per_share"),
+            transaction_shares=d.get("transaction_shares"),
+            transaction_timeliness=d.get("transaction_timeliness"),
+            transaction_value=d.get("transaction_value"),
+            underlying_security_shares=d.get("underlying_security_shares"),
+            underlying_security_title=d.get("underlying_security_title"),
+        )
+
+
 @modelclass
 class Filing8K:
     """Parsed 8-K filing with item-level text content."""
diff --git a/massive/rest/reference.py b/massive/rest/reference.py
index 06ad037f..69a29479 100644
--- a/massive/rest/reference.py
+++ b/massive/rest/reference.py
@@ -30,6 +30,9 @@
     RiskFactorTaxonomy,
     FilingSection,
     Filing8K,
+    Filing13F,
+    FilingForm3,
+    FilingForm4,
     FilingIndex,
 )
 from urllib3 import HTTPResponse
@@ -991,3 +994,131 @@ def list_stocks_filings_index(
             raw=raw,
             options=options,
         )
+
+    def list_stocks_filings_13f(
+        self,
+        filer_cik: Optional[str] = None,
+        filer_cik_any_of: Optional[str] = None,
+        filing_date: Optional[Union[str, date]] = None,
+        filing_date_gt: Optional[Union[str, date]] = None,
+        filing_date_gte: Optional[Union[str, date]] = None,
+        filing_date_lt: Optional[Union[str, date]] = None,
+        filing_date_lte: Optional[Union[str, date]] = None,
+        limit: Optional[int] = 100,
+        sort: Optional[Union[str, Sort]] = "filing_date.desc",
+        params: Optional[Dict[str, Any]] = None,
+        raw: bool = False,
+        options: Optional[RequestOptionBuilder] = None,
+    ) -> Union[Iterator[Filing13F], HTTPResponse]:
+        """
+        SEC Form 13F filings data showing institutional investment manager holdings.
+        Form 13F is required to be filed quarterly by institutional investment managers
+        with at least $100 million in qualifying assets under management.
+        """
+        url = "/stocks/filings/vX/13-F"
+
+        return self._paginate(
+            path=url,
+            params=self._get_params(self.list_stocks_filings_13f, locals()),
+            result_key="results",
+            deserializer=Filing13F.from_dict,
+            raw=raw,
+            options=options,
+        )
+
+    def list_stocks_filings_form_3(
+        self,
+        issuer_cik: Optional[str] = None,
+        issuer_cik_any_of: Optional[str] = None,
+        owner_cik: Optional[str] = None,
+        owner_cik_any_of: Optional[str] = None,
+        tickers: Optional[str] = None,
+        tickers_all_of: Optional[str] = None,
+        tickers_any_of: Optional[str] = None,
+        form_type: Optional[str] = None,
+        filing_date: Optional[Union[str, date]] = None,
+        filing_date_gt: Optional[Union[str, date]] = None,
+        filing_date_gte: Optional[Union[str, date]] = None,
+        filing_date_lt: Optional[Union[str, date]] = None,
+        filing_date_lte: Optional[Union[str, date]] = None,
+        max_ticker: Optional[str] = None,
+        max_ticker_any_of: Optional[str] = None,
+        max_ticker_gt: Optional[str] = None,
+        max_ticker_gte: Optional[str] = None,
+        max_ticker_lt: Optional[str] = None,
+        max_ticker_lte: Optional[str] = None,
+        min_ticker: Optional[str] = None,
+        min_ticker_any_of: Optional[str] = None,
+        min_ticker_gt: Optional[str] = None,
+        min_ticker_gte: Optional[str] = None,
+        min_ticker_lt: Optional[str] = None,
+        min_ticker_lte: Optional[str] = None,
+        limit: Optional[int] = 100,
+        sort: Optional[Union[str, Sort]] = "filing_date.desc",
+        params: Optional[Dict[str, Any]] = None,
+        raw: bool = False,
+        options: Optional[RequestOptionBuilder] = None,
+    ) -> Union[Iterator[FilingForm3], HTTPResponse]:
+        """
+        SEC Form 3 filings reporting initial statements of beneficial ownership of securities.
+        Filed by corporate insiders (directors, officers, and 10%+ shareholders) when they first acquire a position.
+        """
+        url = "/stocks/filings/vX/form-3"
+
+        return self._paginate(
+            path=url,
+            params=self._get_params(self.list_stocks_filings_form_3, locals()),
+            result_key="results",
+            deserializer=FilingForm3.from_dict,
+            raw=raw,
+            options=options,
+        )
+
+    def list_stocks_filings_form_4(
+        self,
+        issuer_cik: Optional[str] = None,
+        issuer_cik_any_of: Optional[str] = None,
+        owner_cik: Optional[str] = None,
+        owner_cik_any_of: Optional[str] = None,
+        tickers: Optional[str] = None,
+        tickers_all_of: Optional[str] = None,
+        tickers_any_of: Optional[str] = None,
+        form_type: Optional[str] = None,
+        transaction_code: Optional[str] = None,
+        filing_date: Optional[Union[str, date]] = None,
+        filing_date_gt: Optional[Union[str, date]] = None,
+        filing_date_gte: Optional[Union[str, date]] = None,
+        filing_date_lt: Optional[Union[str, date]] = None,
+        filing_date_lte: Optional[Union[str, date]] = None,
+        max_ticker: Optional[str] = None,
+        max_ticker_any_of: Optional[str] = None,
+        max_ticker_gt: Optional[str] = None,
+        max_ticker_gte: Optional[str] = None,
+        max_ticker_lt: Optional[str] = None,
+        max_ticker_lte: Optional[str] = None,
+        min_ticker: Optional[str] = None,
+        min_ticker_any_of: Optional[str] = None,
+        min_ticker_gt: Optional[str] = None,
+        min_ticker_gte: Optional[str] = None,
+        min_ticker_lt: Optional[str] = None,
+        min_ticker_lte: Optional[str] = None,
+        limit: Optional[int] = 100,
+        sort: Optional[Union[str, Sort]] = "filing_date.desc",
+        params: Optional[Dict[str, Any]] = None,
+        raw: bool = False,
+        options: Optional[RequestOptionBuilder] = None,
+    ) -> Union[Iterator[FilingForm4], HTTPResponse]:
+        """
+        SEC Form 4 filings reporting changes in beneficial ownership of securities.
+        Filed by corporate insiders (directors, officers, and 10%+ shareholders) within two business days of a transaction.
+        """
+        url = "/stocks/filings/vX/form-4"
+
+        return self._paginate(
+            path=url,
+            params=self._get_params(self.list_stocks_filings_form_4, locals()),
+            result_key="results",
+            deserializer=FilingForm4.from_dict,
+            raw=raw,
+            options=options,
+        )