As of September 29, 2026, the three largest insider holders of NSC are James A Squires (Chairman And Ceo, 60.91K shares), Clyde H Jr Allison (Vice President And Controller, 43.43K shares), Alan H. Shaw (President Ceo, 35.05K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | James A Squires | Chairman And Ceo | 60,907 | 0 | 60,907 | 21.4% | 31 Jan, 2023 |
| 2 | Clyde H Jr Allison | Vice President And Controller | 43,433 | 0 | 43,433 | 15.3% | 01 Feb, 2022 |
| 3 | Alan H. Shaw | President Ceo | 35,045 | 0 | 35,045 | 12.3% | 30 Sep, 2024 |
| 4 | Mark R George | President Ceo | 22,783 | 0 | 22,783 | 8.0% | 15 Sep, 2026 |
| 5 | Claude Mongeau | Director | 0 | 20,000 | 20,000 | 7.0% | 31 May, 2024 |
| 6 | Ann A Adams | Evp Chief Transform. Officer | 19,779 | 0 | 19,779 | 7.0% | 01 Feb, 2024 |
| 7 | Sameh Fahmy | Director | 12,000 | 0 | 12,000 | 4.2% | 06 Nov, 2025 |
| 8 | John F Orr | Evp Chief Operating Officer | 11,363 | 0 | 11,363 | 4.0% | 28 Apr, 2026 |
| 9 | Richard H Anderson | Director | 0 | 7,000 | 7,000 | 2.5% | 28 Oct, 2025 |
| 10 | Michael D Lockhart | Director | 6,012 | 0 | 6,012 | 2.1% | 30 Jan, 2024 |
| 11 | Thomas D Jr Bell | Director | 5,920 | 0 | 5,920 | 2.1% | 30 Jan, 2024 |
| 12 | Steven F Leer | Director | 5,220 | 0 | 5,220 | 1.8% | 30 Jan, 2024 |
| 13 | Claiborne L Moore | Vice President Controller | 4,970 | 0 | 4,970 | 1.7% | 03 Feb, 2026 |
| 14 | Jason Andrew Zampi | Evp Cfo | 4,145 | 0 | 4,145 | 1.5% | 03 Feb, 2026 |
| 15 | Gilbert H Lamphere | Director | 3,647 | 0 | 3,647 | 1.3% | 03 Feb, 2026 |
| 16 | John C Jr Huffard | Director | 0 | 3,398 | 3,398 | 1.2% | 31 May, 2024 |
| 17 | Claude E Elkins | Evp Chief Commercial Officer | 3,365 | 0 | 3,365 | 1.2% | 03 Feb, 2026 |
| 18 | Cynthia M Sanborn | Evp Chief Operating Officer | 2,791 | 0 | 2,791 | 1.0% | 01 Feb, 2022 |
| 19 | Paul B Duncan | Evp Chief Operating Officer | 2,621 | 0 | 2,621 | 0.9% | 04 Mar, 2024 |
| 20 | Lorri J Kleine | Svp Chief Legal Officer | 2,563 | 0 | 2,563 | 0.9% | 01 Feb, 2022 |
| 21 | Thomas Colm Kelleher | Director | 2,282 | 0 | 2,282 | 0.8% | 05 Jun, 2024 |
| 22 | Anil Bhatt | Evp Cido | 2,039 | 0 | 2,039 | 0.7% | 03 Feb, 2026 |
| 23 | Nabanita C Nag | Evp Corp Affairs, Clocorp Sec | 1,488 | 0 | 1,488 | 0.5% | 31 Jul, 2024 |
| 24 | Mitchell E Daniels | Director | 720 | 0 | 720 | 0.3% | 31 Jan, 2022 |
| 25 | William Jr. Clyburn | Director | 405 | 0 | 405 | 0.1% | 08 Dec, 2025 |
| 26 | Francesca A. Debiase | Director | 350 | 0 | 350 | 0.1% | 31 Jul, 2024 |
| 27 | Jennifer F. Scanlon | Director | 0 | 84 | 84 | 0.0% | 15 Sep, 2022 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 20 Aug, 2026 | Christopher T Jones | Director | Acquired A | 20 | $347.91 | $7.12K | 5,295 | Direct |
| 20 Aug, 2026 | Mary Kathryn Heitkamp | Director | Acquired A | 7 | $347.91 | $2.47K | 1,834 | Direct |
| 20 Aug, 2026 | Richard H Anderson | Director | Acquired A | 7 | $346.62 | $2.38K | 1,771 | Direct |
| 20 Aug, 2026 | Lori Ryerkerk | Director | Acquired A | 3 | $347.91 | $973 | 1,345 | Direct |
| 20 Aug, 2026 | John C Jr Huffard | Director | Acquired A | 12 | $346.62 | $4.22K | 3,135 | Direct |
| 20 Aug, 2026 | Sameh Fahmy | Director | Acquired A | 7 | $347.91 | $2.47K | 1,834 | Direct |
| 20 Aug, 2026 | Phillip S Davidson | Director | Acquired A | 10 | $347.91 | $3.40K | 2,530 | Direct |
| 20 Aug, 2026 | Gilbert H Lamphere | Director | Acquired A | 2 | $347.91 | $847 | 630 | Direct |
| 20 Aug, 2026 | Francesca A. Debiase | Director | Acquired A | 8 | $347.91 | $2.90K | 2,156 | Direct |
| 20 Aug, 2026 | Marcela E Donadio | Director | Acquired A | 34 | $347.91 | $11.80K | 9,393 | Direct |
| 20 Aug, 2026 | William Jr. Clyburn | Director | Acquired A | 7 | $347.91 | $2.47K | 1,834 | Direct |
| 20 Aug, 2026 | John C Jr Huffard | Director | Acquired A | 20 | $347.91 | $7.12K | 5,295 | Direct |
| 20 Aug, 2026 | Richard H Anderson | Director | Acquired A | 9 | $347.91 | $3.21K | 2,388 | Direct |
| 27 Jul, 2026 | Brian Barr | Chief Operating Officer | Acquired A | 1,456 | — | — | 4,404 | Direct |
| 30 Jun, 2026 | Richard H Anderson | Director | Acquired A | 251 | $314.59 | $79.03K | 1,764 | Direct |
| 30 Jun, 2026 | John C Jr Huffard | Director | Acquired A | 168 | $314.59 | $53.00K | 3,123 | Direct |
| 20 May, 2026 | Marcela E Donadio | Director | Acquired A | 37 | $315.38 | $11.74K | 9,359 | Direct |
| 20 May, 2026 | John C Jr Huffard | Director | Acquired A | 13 | $311.84 | $3.97K | 2,954 | Direct |
| 20 May, 2026 | Christopher T Jones | Director | Acquired A | 22 | $315.38 | $7.09K | 5,274 | Direct |
| 20 May, 2026 | Richard H Anderson | Director | Acquired A | 7 | $311.84 | $2.03K | 1,513 | Direct |