| 1. Alagiri was named after the Tamil writer, Azhagirisamy, by his father who was a fan of the writer. |
| 2. He entered politics at a young age with the mentorship of his father, M. Karunanidhi. |
| 3. Alagiri played a significant role in his party's victory in three 2008 by-elections. |
| 4. A dispute arose between Alagiri and his brother, M. K. Stalin, concerning the leadership succession of their father's party. |
| 5. He successfully secured the Madurai constituency in the 2009 Parliamentary elections. |
| 6. As the Cabinet Minister of Chemicals and Industries, Alagiri faced inquiries regarding his parliamentary attendance. |
| 7. He was instrumental in keeping the DMK flock together after Vaiko quit the party in 1993. |
| 8. He was suspended from the DMK twice during his political career. |
| 9. He was acquitted in 2008 in connection with the 2003 murder of former minister T. Kiruttinan, with the court citing lack of reliable evidence. |
| 10. He was the first DMK leader to win the Madurai Lok Sabha seat on his own, breaking a historical pattern where only DMK allies had won from this constituency. |
