Comparable stake leader
VANGUARD PORTFOLIO MANAGEMENT LLC
SEC ownership of CABOT CORP
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000016040.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
30 Jun 2026
- Public ticker
- CBT on NYSE
- Parsed ownership sources
-
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
VANGUARD PORTFOLIO MANAGEMENT LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
VANGUARD PORTFOLIO MANAGEMENT LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000016040
- Issuer location
- Boston, MA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of CABOT CORP (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
VANGUARD PORTFOLIO MANAGE...
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
30 Jun 2026
13F
13D/G
3/4/5
Lead comparable stake: 6.1%
13D/G row: VANGUARD PORTFOLIO MANAGEMENT LLC
Showing 1-8 of 50 holder rows.
Quick read
VANGUARD PORTFOLIO MANAGEMENT LLC leads the comparable SEC ownership view at 6.1%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens VANGUARD PORTFOLIO MANAGEMENT LLC's linked filing trail.
Comparable ownership
Top 5
VANGUARD PORTFOLIO MANAGEMENT LLC
6.1%
AMERICAN CENTURY INVESTMENT MANAG...
5.4%
VANGUARD CAPITAL MANAGEMENT LLC
5.2%
WELLINGTON MANAGEMENT GROUP LLP
4.7%
William C. Kirby
0.05%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13F
13D/G
Company · Vanguard Portfolio Management
|
6.1%
from 13D/G
|
$279,447,237
3,076,935 shares
|
— | 30 Jun 2026 |
| AMERICAN CENTURY INVESTMENT MANAGEMENT INC |
13D/G
|
5.4%
|
$229,481,790
2,768,176 shares
|
$0 | 30 Jun 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
13D/G
Company · Vanguard Capital Management
|
5.2%
from 13D/G
|
$210,806,116
2,321,142 shares
|
— | 30 Jun 2026 |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
13D/G
Company
|
4.7%
from 13D/G
|
$219,463,897
2,416,471 shares
|
— | 30 Jun 2026 |
| William C. Kirby |
3/4/5
Director
|
0.05%
|
$1,835,163
27,688 shares
|
— | 08 Jan 2026 |
| Michael M. Morrow |
3/4/5
Director
|
0.04%
|
$1,478,178
22,302 shares
|
— | 08 Jan 2026 |
| Cynthia A. Arnold |
3/4/5
Director
|
0.04%
|
$1,300,415
19,620 shares
|
— | 08 Jan 2026 |
| Frank Anders Wilson |
3/4/5
Director
|
0.04%
|
$1,229,628
18,552 shares
|
— | 08 Jan 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$19,646,314.
Buys
$0
Insiders: 0
Sells
$19,646,314
Insiders: 1
Net
-$19,646,314
Shares: -229,597
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 229,597
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 229,597 | $0 | $19,646,314 | -$19,646,314 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 20 reporting-owner rows connected to CABOT CORP. Open a relationship link for the CIK-to-CIK filing trail.
Rows
20
Largest Forms 3/4/5 holder
Sean D. Keohane
Net 12M change
-$19,646,314
Latest report
28 Aug 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Sean D. Keohane | President and CEO, Director | $38,774,291 | -$19,646,314 | -34% | Mixed | 28 Aug 2026 |
| Hobart Kalkstein | Executive Vice President | $7,339,113 | Mixed | 13 Jun 2025 | ||
| Cabot Juan Enriquez | Director | $6,424,583 | Mixed | 08 Jan 2026 | ||
| Erica McLaughlin | Executive Vice President, CFO | $5,323,084 | Mixed | 12 Jun 2026 | ||
| Jeff Ji Zhu | Executive Vice President | $5,099,739 | Mixed | 19 Nov 2025 | ||
| Matthais L. Wolfgruber | Director | $4,293,232 | Mixed | 14 Mar 2025 | ||
| Karen A. Kalita | SVP and General Counsel | $3,091,642 | Mixed | 12 Jun 2026 | ||
| Sue H. Rataj | Director | $2,268,391 | Mixed | 11 Jan 2024 | ||
| William C. Kirby | Director | $1,835,163 | Mixed | 08 Jan 2026 | ||
| Michael M. Morrow | Director | $1,478,178 | Mixed | 08 Jan 2026 | ||
| Douglas G. Delgrosso | Director | $1,348,258 | Mixed | 12 Jun 2026 | ||
| Cynthia A. Arnold | Director | $1,300,415 | Mixed | 08 Jan 2026 | ||
| Frank Anders Wilson | Director | $1,229,628 | Mixed | 08 Jan 2026 | ||
| Christine Y. Yan | Director | $1,138,095 | Mixed | 08 Jan 2026 | ||
| Lisa M. Dumont | VP, Controller & CAO | $860,073 | Mixed | 12 Jun 2026 | ||
| Matthew Forster Wood | Senior Vice President | $827,461 | Mixed | 19 Nov 2025 | ||
| Raffiq Nathoo | Director | $699,258 | Mixed | 30 Jun 2026 | ||
| William F. Masterson III | Senior Vice President | $470,481 | Mixed | 12 Jun 2026 | ||
| Michelle Elizabeth Williams | Director | $449,113 | Mixed | 08 Jan 2026 | ||
| Thierry Fj Vanlancker | Director | $324,905 | Mixed | 08 Jan 2026 |
Recent insider transactions for CABOT CORP
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Sean D. Keohane | CBT | Common Stock | Sale | -25% | $11,466,075 | $85.00 | -134,895 | 404,134 | 28 Aug 2026 | Direct |
| Sean D. Keohane | CBT | Common Stock | Options Exercise | 33.4% | 134,895 | 539,029 | 28 Aug 2026 | Direct | ||
| Sean D. Keohane | CBT | Employee Stock Option (Right to Buy) | Options Exercise | -100% | -134,895 | 0 | 28 Aug 2026 | Direct | ||
| Sean D. Keohane | CBT | Common Stock | Sale | -0.95% | $237,604 | $85.50 | -2,779 | 288,873 | 24 Aug 2026 | Direct |
| Sean D. Keohane | CBT | Common Stock | Options Exercise | 0.96% | 2,779 | 291,652 | 24 Aug 2026 | Direct | ||
| Sean D. Keohane | CBT | Employee Stock Option (Right to Buy) | Options Exercise | 2.1% | 2,779 | 134,895 | 24 Aug 2026 | Direct | ||
| Sean D. Keohane | CBT | Common Stock | Sale | -18.5% | $7,942,634 | $86.41 | -91,923 | 404,134 | 07 Aug 2026 | Direct |
| Sean D. Keohane | CBT | Common Stock | Options Exercise | 22.8% | 91,923 | 496,057 | 07 Aug 2026 | Direct | ||
| Sean D. Keohane | CBT | Employee Stock Option (Right to Buy) | Options Exercise | 91,923 | 0 | 07 Aug 2026 | Direct | |||
| Raffiq Nathoo | CBT | Phantom Stock Units | Award | 16.2% | 262 | 1,878 | 30 Jun 2026 | Direct | ||
| Sean D. Keohane | CBT | Phantom Stock Units | Award | 0.18% | 83.68 | 47,831 | 30 Jun 2026 | Direct | ||
| Lisa M. Dumont | CBT | Phantom Stock Units | Award | 0.54% | 3.98 | 743 | 12 Jun 2026 | Direct | ||
| Douglas G. Delgrosso | CBT | Phantom Stock Units | Award | 0.54% | 27.69 | 5,165 | 12 Jun 2026 | Direct | ||
| Karen A. Kalita | CBT | Phantom Stock Units | Award | 0.54% | 28.47 | 5,310 | 12 Jun 2026 | Direct | ||
| Raffiq Nathoo | CBT | Phantom Stock Units | Award | 0.54% | 8.67 | 1,616 | 12 Jun 2026 | Direct | ||
| Erica McLaughlin | CBT | Phantom Stock Units | Award | 0.54% | 55.23 | 10,301 | 12 Jun 2026 | Direct | ||
| Sean D. Keohane | CBT | Phantom Stock Units | Award | 0.54% | 256 | 47,747 | 12 Jun 2026 | Direct | ||
| William F. Masterson III | CBT | Phantom Stock Units | Award | 0.54% | 2.82 | 527 | 12 Jun 2026 | Direct | ||
| Raffiq Nathoo | CBT | Phantom Stock Units | Award | 24.4% | 315 | 1,608 | 31 Mar 2026 | Direct | ||
| Lisa M. Dumont | CBT | Phantom Stock Units | Award | 0.65% | 4.75 | 739 | 13 Mar 2026 | Direct | ||
| Erica McLaughlin | CBT | Phantom Stock Units | Award | 0.65% | 65.92 | 10,246 | 13 Mar 2026 | Direct | ||
| Douglas G. Delgrosso | CBT | Phantom Stock Units | Award | 0.65% | 33.05 | 5,137 | 13 Mar 2026 | Direct | ||
| Sean D. Keohane | CBT | Phantom Stock Units | Award | 0.65% | 306 | 47,491 | 13 Mar 2026 | Direct | ||
| Raffiq Nathoo | CBT | Phantom Stock Units | Award | 0.65% | 8.32 | 1,292 | 13 Mar 2026 | Direct | ||
| Karen A. Kalita | CBT | Phantom Stock Units | Award | 0.65% | 33.98 | 5,281 | 13 Mar 2026 | Direct | ||
| William F. Masterson III | CBT | Phantom Stock Units | Award | 0.65% | 3.37 | 524 | 13 Mar 2026 | Direct | ||
| Cabot Juan Enriquez | CBT | Common Stock | Award | 1.18% | 486 | 41,526 | 08 Jan 2026 | Direct | ||
| Raffiq Nathoo | CBT | Common Stock | Award | 33% | 2,298 | 9,266 | 08 Jan 2026 | Direct | ||
| Douglas G. Delgrosso | CBT | Common Stock | Award | 18% | 2,298 | 15,079 | 08 Jan 2026 | Direct | ||
| Thierry Fj Vanlancker | CBT | Common Stock | Award | 88.2% | 2,298 | 4,902 | 08 Jan 2026 | Direct | ||
| Michelle Elizabeth Williams | CBT | Common Stock | Award | 51.3% | 2,298 | 6,776 | 08 Jan 2026 | Direct | ||
| Michael M. Morrow | CBT | Common Stock | Award | 11.5% | 2,298 | 22,302 | 08 Jan 2026 | Direct | ||
| Christine Y. Yan | CBT | Common Stock | Award | 15.4% | 2,298 | 17,171 | 08 Jan 2026 | Direct | ||
| Frank Anders Wilson | CBT | Common Stock | Award | 14.1% | 2,298 | 18,552 | 08 Jan 2026 | Direct | ||
| Cynthia A. Arnold | CBT | Common Stock | Award | 13.3% | 2,298 | 19,620 | 08 Jan 2026 | Direct | ||
| William C. Kirby | CBT | Common Stock | Award | 1.79% | 486 | 27,688 | 08 Jan 2026 | Direct | ||
| Raffiq Nathoo | CBT | Phantom Stock Units | Award | 38.7% | 358 | 1,284 | 31 Dec 2025 | Direct | ||
| Raffiq Nathoo | CBT | Phantom Stock Units | Conversion of derivative security | -78.5% | -3,384 | 926 | 31 Dec 2025 | Direct | ||
| Cabot Juan Enriquez | CBT | Phantom Stock Units | Award | 0.75% | 415 | 55,405 | 31 Dec 2025 | Direct | ||
| Lisa M. Dumont | CBT | Phantom Stock Units | Award | 33% | 182 | 734 | 31 Dec 2025 | Direct | ||
| Karen A. Kalita | CBT | Phantom Stock Units | Award | 21.3% | 922 | 5,247 | 31 Dec 2025 | Direct | ||
| Erica McLaughlin | CBT | Phantom Stock Units | Award | 11.3% | 1,035 | 10,180 | 31 Dec 2025 | Direct | ||
| William F. Masterson III | CBT | Phantom Stock Units | Award | 78.3% | 229 | 520 | 31 Dec 2025 | Direct | ||
| Sean D. Keohane | CBT | Phantom Stock Units | Award | 5.74% | 2,563 | 47,186 | 31 Dec 2025 | Direct | ||
| Erica McLaughlin | CBT | Phantom Stock Units | Award | 0.66% | 59.83 | 9,145 | 12 Dec 2025 | Direct | ||
| Cabot Juan Enriquez | CBT | Phantom Stock Units | Award | 0.66% | 360 | 54,990 | 12 Dec 2025 | Direct | ||
| Raffiq Nathoo | CBT | Phantom Stock Units | Award | 0.66% | 28.19 | 4,310 | 12 Dec 2025 | Direct | ||
| Karen A. Kalita | CBT | Phantom Stock Units | Award | 0.66% | 28.29 | 4,325 | 12 Dec 2025 | Direct | ||
| William F. Masterson III | CBT | Phantom Stock Units | Award | 0.66% | 1.91 | 292 | 12 Dec 2025 | Direct | ||
| Lisa M. Dumont | CBT | Phantom Stock Units | Award | 0.66% | 3.61 | 552 | 12 Dec 2025 | Direct |
* marks a reported price that did not pass the local price check.