SEC Form 4 · Updated Daily
CBT
— CABOT CORPORATION OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| OBERNDORF WILLIAM E | 10%+ Owner | 5,913,400 | 2009-05-28 | S |
| MCDERMOTT EDWARD H | 10%+ Owner | 5,913,400 | 2009-05-28 | S |
| SPO ADVISORY PARTNERS LP | 10%+ Owner | 5,913,400 | 2009-05-28 | S |
| SPO PARTNERS II LP | 10%+ Owner | 5,913,400 | 2009-05-28 | S |
| SCULLY JOHN H | 10%+ Owner | 5,913,400 | 2009-05-28 | S |
| Elizabeth R. & William J. Patterson Foundation | 10%+ Owner | 5,913,400 | 2009-05-28 | S |
| SPO ADVISORY CORP | 10%+ Owner | 5,913,400 | 2009-05-28 | S |
| PATTERSON WILLIAM J | 10%+ Owner | 5,913,400 | 2009-05-28 | S |
| BURNES KENNETT F | Director | 814,622 | 2007-08-03 | A |
| Keohane Sean D | Director · Officer | 539,029 | 2026-08-28 | M |
| PETER C OBERNDORF TRUST | 10%+ Owner | 448,650 | 2006-02-15 | P |
| WILLIAM ERNST OBERNDORF TRUST | 10%+ Owner | 448,650 | 2006-02-15 | P |
| WEIMER BETTY JANE | 10%+ Owner | 448,650 | 2006-02-15 | P |
| OBERNDORF FAMILY PARTNERS | 10%+ Owner | 433,650 | 2006-02-10 | P |
| WILLIAM & SUSAN OBERNDORF TRUST | 10%+ Owner | 394,450 | 2006-01-10 | P |
| Prevost Patrick M. | Director | 220,166 | 2020-01-09 | A |
| BRADY WILLIAM J | Officer | 99,321 | 2009-05-18 | S |
| Zhu Jeff Ji | Officer | 86,335 | 2025-11-19 | A |
| McLaughlin Erica | Officer | 80,041 | 2025-11-19 | A |
| CORDEIRO EDUARDO E | Director | 73,956 | 2018-03-11 | F |
| Blevi Dirk | Director · Officer | 65,417 | 2007-07-16 | A |
| Mason Jonathan P | Officer | 64,134 | 2009-02-13 | D |
| Cross Nicholas S. | Officer | 58,597 | 2018-08-21 | M |
| Kalkstein Hobart | Officer | 56,934 | 2024-11-18 | A |
| Paintal Ravijit | Reporting Owner | 55,900 | 2007-08-06 | A |
| OBRIEN JOHN F | Director | 53,992 | 2020-01-09 | A |
| BERUBE BRIAN A | Officer | 49,813 | 2019-03-11 | F |
| WRIGHTON MARK S | Reporting Owner | 47,590 | 2021-01-07 | A |
| Kalita Karen A | Officer | 46,114 | 2025-11-19 | A |
| ENRIQUEZ CABOT JUAN | Director | 41,526 | 2026-01-08 | A |
| Miller David A | Officer | 33,175 | 2014-11-13 | M |
| CLARKESON JOHN S | Reporting Owner | 33,142 | 2015-01-09 | A |
| THOMAS LYDIA W | Reporting Owner | 32,849 | 2017-01-13 | A |
| GOLDSTEIN ARTHUR L | Director | 27,949 | 2011-01-14 | A |
| SCHMITZ RONALDO H | Director | 27,942 | 2016-01-08 | A |
| Kirby William C. | Director | 27,688 | 2026-01-08 | A |
| Rataj Sue H. | Director | 27,460 | 2024-01-11 | A |
| Kelly James Patrick | Officer | 27,296 | 2019-11-20 | A |
| von Gottberg Friedrich | Officer | 26,679 | 2018-11-19 | A |
| KAJI GAUTAM S | Director | 23,619 | 2014-01-10 | A |
| Morrow Michael M | Director | 22,302 | 2026-01-08 | A |
| Wolfgruber Matthais L. | Director | 22,099 | 2025-01-10 | A |
| MCCANCE HENRY F | Director | 21,942 | 2016-01-08 | A |
| MCGILLICUDDY JOHN K | Director | 20,273 | 2019-01-10 | A |
| Arnold Cynthia A | Director | 19,620 | 2026-01-08 | A |
| Wilson Frank Anders | Director | 18,552 | 2026-01-08 | A |
| Yan Christine Y | Director | 17,171 | 2026-01-08 | A |
| MACLEOD RODERICK | Director | 16,193 | 2018-01-12 | A |
| DELGROSSO DOUGLAS G | Director | 15,079 | 2026-01-08 | A |
| Wood Matthew Forster | Officer | 13,715 | 2025-11-19 | A |
| Dumont Lisa M | Officer | 11,915 | 2025-11-19 | A |
| Zhang Shengman | Director | 9,375 | 2010-01-08 | A |
| Nathoo Raffiq | Director | 9,266 | 2026-01-08 | A |
| Doubman John R | Director | 7,780.2 | 2019-03-14 | I |
| Masterson William F III | Officer | 7,210 | 2025-12-03 | A |
| Williams Michelle Elizabeth | Director | 6,776 | 2026-01-08 | A |
| Delahunt Steven J | Officer | 5,399 | 2026-10-01 | — |
| MCARTHUR JOHN H | Director | 4,934.89 | 2007-01-12 | A |
| Vanlancker Thierry FJ | Director | 4,902 | 2026-01-08 | A |
| SF ADVISORY PARTNERS LP | 10%+ Owner | 0 | 2009-03-12 | S |
| SAN FRANCISCO PARTNERS II LP | 10%+ Owner | 0 | 2009-03-12 | S |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-10-01 | Delahunt Steven J | — | — | — | 2.473 |
| 2026-10-01 | Delahunt Steven J | — | — | — | 5,399 |
| 2026-09-30 | Nathoo Raffiq | Grant / award (derivative) | 360.811 | $76.91 | 2,249.864 |
| 2026-09-30 | Keohane Sean D | Grant / award (derivative) | 346.259 | $76.91 | 48,460.873 |
| 2026-09-30 | Kalita Karen A | Grant / award (derivative) | 44.88 | $76.91 | 5,386.156 |
| 2026-09-30 | McLaughlin Erica | Grant / award (derivative) | 93.545 | $76.91 | 10,455.609 |
| 2026-09-30 | Masterson William F III | Grant / award (derivative) | 24.154 | $76.91 | 553.896 |
| 2026-09-11 | Kalita Karen A | Grant / award (derivative) | 31.487 | $79.68 | 5,341.277 |
| 2026-09-11 | Keohane Sean D | Grant / award (derivative) | 283.636 | $79.68 | 48,114.614 |
| 2026-09-11 | DELGROSSO DOUGLAS G | Grant / award (derivative) | 30.628 | $79.68 | 5,195.582 |
| 2026-09-11 | Dumont Lisa M | Grant / award (derivative) | 4.404 | $79.68 | 747.056 |
| 2026-09-11 | Nathoo Raffiq | Grant / award (derivative) | 11.136 | $79.68 | 1,889.053 |
| 2026-09-11 | Masterson William F III | Grant / award (derivative) | 3.123 | $79.68 | 529.742 |
| 2026-09-11 | McLaughlin Erica | Grant / award (derivative) | 61.085 | $79.68 | 10,362.064 |
| 2026-08-28 | Keohane Sean D | Option exercise (derivative) | 134,895 | $0.00 | 0 |
| 2026-08-28 | Keohane Sean D | Open-market sale | 134,895 | $85.00 | 404,134 |
| 2026-08-28 | Keohane Sean D | Option exercise | 134,895 | $50.00 | 539,029 |
| 2026-08-24 | Keohane Sean D | Option exercise (derivative) | 2,779 | $0.00 | 134,895 |
| 2026-08-24 | Keohane Sean D | Open-market sale | 2,779 | $85.50 | 288,873 |
| 2026-08-24 | Keohane Sean D | Option exercise | 2,779 | $50.00 | 291,652 |
| 2026-08-07 | Keohane Sean D | Option exercise (derivative) | 91,923 | $0.00 | 0 |
| 2026-08-07 | Keohane Sean D | Open-market sale | 91,923 | $86.41 | 404,134 |
| 2026-08-07 | Keohane Sean D | Option exercise | 91,923 | $62.24 | 496,057 |
| 2026-06-30 | Keohane Sean D | Grant / award (derivative) | 83.682 | $90.82 | 47,830.977 |
| 2026-06-30 | Nathoo Raffiq | Grant / award (derivative) | 261.506 | $90.82 | 1,877.917 |
| 2026-06-12 | Masterson William F III | Grant / award (derivative) | 2.824 | $87.65 | 526.619 |
| 2026-06-12 | Keohane Sean D | Grant / award (derivative) | 256.014 | $87.65 | 47,747.295 |
| 2026-06-12 | McLaughlin Erica | Grant / award (derivative) | 55.232 | $87.65 | 10,300.98 |
| 2026-06-12 | Nathoo Raffiq | Grant / award (derivative) | 8.667 | $87.65 | 1,616.41 |
| 2026-06-12 | Kalita Karen A | Grant / award (derivative) | 28.47 | $87.65 | 5,309.79 |
| 2026-06-12 | DELGROSSO DOUGLAS G | Grant / award (derivative) | 27.694 | $87.65 | 5,164.954 |
| 2026-06-12 | Dumont Lisa M | Grant / award (derivative) | 3.982 | $87.65 | 742.652 |
| 2026-03-31 | Nathoo Raffiq | Grant / award (derivative) | 315.363 | $75.31 | 1,607.744 |
| 2026-03-13 | Masterson William F III | Grant / award (derivative) | 3.37 | $69.49 | 523.795 |
| 2026-03-13 | Kalita Karen A | Grant / award (derivative) | 33.98 | $69.49 | 5,281.32 |
| 2026-03-13 | Nathoo Raffiq | Grant / award (derivative) | 8.315 | $69.49 | 1,292.38 |
| 2026-03-13 | Keohane Sean D | Grant / award (derivative) | 305.563 | $69.49 | 47,491.281 |
| 2026-03-13 | DELGROSSO DOUGLAS G | Grant / award (derivative) | 33.054 | $69.49 | 5,137.26 |
| 2026-03-13 | McLaughlin Erica | Grant / award (derivative) | 65.922 | $69.49 | 10,245.748 |
| 2026-03-13 | Dumont Lisa M | Grant / award (derivative) | 4.753 | $69.49 | 738.67 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.