diff --git a/ROADMAP.md b/ROADMAP.md
index 56cf036..b064e35 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -22,6 +22,12 @@ history lives in git.
   RSS per ticker, and IDX disclosures and exchange news through a
   maintainer-published feed
 
+## Ownership
+- Store the register's `CONTROLLER_OR_AFFILIATE` flag (from the 30 Oct 2026
+  report; about 1,200 controller and 950 affiliate rows) and show it in
+  `ticker`, `entity` and `changes`, so a controller's moves stand apart.
+  Needs a DB column, the snapshot format, and blank for older reports.
+
 ## Workflow
 - `watchlist`: named symbol sets usable by other commands
 - `alerts`: price alerts with a daemon
diff --git a/crates/idx-cli/tests/cli.rs b/crates/idx-cli/tests/cli.rs
index abdade7..a74683e 100644
--- a/crates/idx-cli/tests/cli.rs
+++ b/crates/idx-cli/tests/cli.rs
@@ -1539,6 +1539,55 @@ fn ownership_import_file_xlsx_supports_ticker_and_releases() {
     assert_eq!(releases[0]["row_count"].as_u64(), Some(17));
 }
 
+/// IDX added a CONTROLLER_OR_AFFILIATE column to the register from October
+/// 2026; it imports alongside an earlier 12-column month.
+#[test]
+fn ownership_import_file_xlsx_with_controller_column() {
+    let root = test_env_dir("ownership-import-xlsx-controller");
+    let db_path = root.join("ownership.db");
+    bin_with_root(&root)
+        .args([
+            "config",
+            "set",
+            "ownership.db_path",
+            db_path.to_str().unwrap(),
+        ])
+        .assert()
+        .success();
+
+    for (name, bytes) in [
+        (
+            "peng-2026-08-00017-satu-persen.xlsx",
+            &include_bytes!("../../idx-core/tests/fixtures/ksei_above1_20260831_excerpt.xlsx")[..],
+        ),
+        (
+            "peng-2026-10-00029-satu-persen.xlsx",
+            &include_bytes!("../../idx-core/tests/fixtures/ksei_above1_20261030_excerpt.xlsx")[..],
+        ),
+    ] {
+        let path = root.join(name);
+        fs::write(&path, bytes).expect("write xlsx fixture");
+        run_success_json(bin_with_root(&root).args([
+            "-o",
+            "json",
+            "ownership",
+            "import",
+            "--file",
+            path.to_str().unwrap(),
+        ]));
+    }
+
+    let ticker =
+        run_success_json(bin_with_root(&root).args(["-o", "json", "ownership", "ticker", "ZYRX"]));
+    assert_eq!(ticker["ksei_as_of"], "2026-10-30");
+    assert_eq!(ticker["holders"].as_array().unwrap().len(), 7);
+    let releases =
+        run_success_json(bin_with_root(&root).args(["-o", "json", "ownership", "releases"]));
+    assert_eq!(releases.as_array().unwrap().len(), 2);
+    assert_eq!(releases[0]["as_of_date"], "2026-10-30");
+    assert_eq!(releases[0]["row_count"].as_u64(), Some(11));
+}
+
 #[test]
 fn ownership_import_file_rejects_above5_xlsx() {
     let root = test_env_dir("ownership-import-xlsx-above5");
diff --git a/crates/idx-core/src/ownership/xlsx.rs b/crates/idx-core/src/ownership/xlsx.rs
index 58751f8..f144c7d 100644
--- a/crates/idx-core/src/ownership/xlsx.rs
+++ b/crates/idx-core/src/ownership/xlsx.rs
@@ -3,9 +3,10 @@
 //! Since June 2026 IDX publishes the monthly above-1% holder register as an
 //! XLSX file on the "Data Kepemilikan Saham" page instead of a PDF
 //! announcement. The workbook has one sheet: a disclaimer block, a `[PUBLIC]`
-//! marker, then a fixed 12-column table. Only that exact header is accepted,
-//! so the daily above-5% workbook and the investor-type / classification
-//! workbooks published on the same page are rejected instead of mis-imported.
+//! marker, then a 12-column table (13 since October 2026, see
+//! `IGNORED_HEADER`). Only those columns are accepted, so the daily above-5%
+//! workbook and the investor-type / classification workbooks published on the
+//! same page are rejected instead of mis-imported.
 
 use std::collections::HashMap;
 use std::fs;
@@ -35,6 +36,12 @@ const EXPECTED_HEADER: [&str; 12] = [
     "PERCENTAGE",
 ];
 
+/// Columns IDX has added to the register that the import does not store yet.
+/// The October 2026 register (as of 30 Oct) inserted CONTROLLER_OR_AFFILIATE
+/// (`CONTROLLER`, `AFFILIATE OF THE CONTROLLER`, or blank) after
+/// INVESTOR_CLASSIFICATION. Any other unknown column still fails the header.
+const IGNORED_HEADER: [&str; 1] = ["CONTROLLER_OR_AFFILIATE"];
+
 /// Rows above this line are disclaimer text; the header must appear before it.
 const MAX_HEADER_SEARCH_ROWS: usize = 50;
 
@@ -400,6 +407,9 @@ fn header_columns(row: &SheetRow) -> Option<HashMap<&'static str, String>> {
         if label == "INVESTOR_TYPE" {
             label = "INVESTOR_CLASSIFICATION".to_string();
         }
+        if IGNORED_HEADER.contains(&label.as_str()) {
+            continue;
+        }
         let expected = EXPECTED_HEADER.iter().find(|name| **name == label)?;
         found.insert(expected, column.clone());
     }
@@ -505,6 +515,43 @@ mod tests {
         );
     }
 
+    #[test]
+    fn parses_october_2026_register_with_controller_column() {
+        let drafts = parse_above1_xlsx_bytes(include_bytes!(
+            "../../tests/fixtures/ksei_above1_20261030_excerpt.xlsx"
+        ))
+        .expect("October 2026 register with CONTROLLER_OR_AFFILIATE parses");
+        assert_eq!(drafts.len(), 11);
+        assert!(
+            drafts
+                .iter()
+                .all(|d| d.report_date == NaiveDate::from_ymd_opt(2026, 10, 30).unwrap())
+        );
+
+        // The new column sits at F, so every later column moved one to the
+        // right; fields are still read by name.
+        let timothy = drafts
+            .iter()
+            .find(|d| d.ticker_code == "ZYRX" && d.raw_investor_name == "TIMOTHY SIDDIK SHU")
+            .expect("ZYRX controller present");
+        assert_eq!(timothy.total_shares, 752_076_700);
+        assert_eq!(timothy.percentage_bps, 5641);
+        assert_eq!(timothy.nationality.as_deref(), Some("INDONESIAN"));
+        assert!(timothy.locality.is_some());
+    }
+
+    #[test]
+    fn controller_column_is_optional_but_other_extras_are_not() {
+        let mut labels = EXPECTED_HEADER.to_vec();
+        labels.insert(5, "CONTROLLER_OR_AFFILIATE");
+        let columns = header_columns(&header_row(&labels)).expect("13-column header accepted");
+        assert_eq!(columns["LOCAL_FOREIGN"], "G");
+        assert_eq!(columns["PERCENTAGE"], "M");
+
+        labels[5] = "PENGENDALI";
+        assert!(header_columns(&header_row(&labels)).is_none());
+    }
+
     fn header_row(labels: &[&str]) -> SheetRow {
         sheet_row(1, labels)
     }
diff --git a/crates/idx-core/tests/fixtures/ksei_above1_20261030_excerpt.xlsx b/crates/idx-core/tests/fixtures/ksei_above1_20261030_excerpt.xlsx
new file mode 100644
index 0000000..53ef3ce
Binary files /dev/null and b/crates/idx-core/tests/fixtures/ksei_above1_20261030_excerpt.xlsx differ
diff --git a/docs/ARCHITECTURE.md b/docs/ARCHITECTURE.md
index ae55edd..e9f3215 100644
--- a/docs/ARCHITECTURE.md
+++ b/docs/ARCHITECTURE.md
@@ -197,7 +197,8 @@ payload, `%PDF`, or `PK` zip magic). `IDX_CURL_IMPERSONATE_BIN` pins a single pr
 
 ### Parser Pipeline
 ```
-KSEI XLSX → zip + quick-xml (sharedStrings + sheet1) → exact 12-column header check
+KSEI XLSX → zip + quick-xml (sharedStrings + sheet1) → header check by name (12 columns;
+  October 2026 added CONTROLLER_OR_AFFILIATE, accepted but not stored yet)
   → KseiHoldingDraft (Excel serial dates, numeric shares, percent → bps)
   → SQLite INSERT (within transaction)