Comparable stake leader
WELLINGTON MANAGEMENT GROUP LLP
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
31 Mar 2026
- Public ticker
- CBT on NYSE
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
WELLINGTON MANAGEMENT GROUP LLP
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
WELLINGTON MANAGEMENT GROUP LLP
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 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
WELLINGTON MANAGEMENT GRO...
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
13D/G
13F
3/4/5
Lead comparable stake: 7.8%
13D/G row: WELLINGTON MANAGEMENT GROUP LLP
Showing 1-8 of 50 holder rows.
Quick read
WELLINGTON MANAGEMENT GROUP LLP leads the comparable SEC ownership view at 7.8%.
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 WELLINGTON MANAGEMENT GROUP LLP's linked filing trail.
Comparable ownership
Top 5
WELLINGTON MANAGEMENT GROUP LLP
7.8%
VANGUARD PORTFOLIO MANAGEMENT LLC
6.1%
VANGUARD CAPITAL MANAGEMENT LLC
5.2%
William C. Kirby
0.05%
Michael M. Morrow
0.04%
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 |
|---|---|---|---|---|---|
| WELLINGTON MANAGEMENT GROUP LLP |
13D/G
13F
Company
|
7.8%
|
$333,455,165
4,235,965 shares
|
$0 | 31 Mar 2025 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
6.1%
|
$239,132,973
3,175,315 shares
|
$0 | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
5.2%
|
$205,399,063
2,727,381 shares
|
$0 | 31 Mar 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 |
| Christine Y. Yan |
3/4/5
Director
|
0.03%
|
$1,138,095
17,171 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: -$9,072,094.
Buys
$0
Insiders: 0
Sells
$9,072,094
Insiders: 1
Net
-$9,072,094
Shares: -114,436
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 114,436
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 114,436 | $0 | $9,072,094 | -$9,072,094 |
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
-$9,072,094
Latest report
30 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Sean D. Keohane | President and CEO, Director | $28,248,962 | -$9,072,094 | -24% | Mixed | 30 Jun 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | ||
| Sean D. Keohane | CBT | Phantom Stock Units | Award | 0.66% | 292 | 44,623 | 12 Dec 2025 | Direct | ||
| Douglas G. Delgrosso | CBT | Phantom Stock Units | Award | 0.66% | 33.39 | 5,104 | 12 Dec 2025 | Direct | ||
| William F. Masterson III | CBT | Common Stock | Award | 93.6% | 3,486 | 7,210 | 03 Dec 2025 | Direct | ||
| William F. Masterson III | CBT | Employee Stock Option (Right to Buy) | Award | 12,767 | 12,767 | 03 Dec 2025 | Direct | |||
| Matthew Forster Wood | CBT | Common Stock | Tax liability | -1.6% | -219 | 13,496 | 19 Nov 2025 | Direct | ||
| Matthew Forster Wood | CBT | Common Stock | Award | 5.14% | 671 | 13,715 | 19 Nov 2025 | Direct | ||
| Karen A. Kalita | CBT | Common Stock | Tax liability | -1.89% | -872 | 45,242 | 19 Nov 2025 | Direct | ||
| Karen A. Kalita | CBT | Common Stock | Award | 22.9% | 8,602 | 46,114 | 19 Nov 2025 | Direct | ||
| Karen A. Kalita | CBT | Employee Stock Option (Right to Buy) | Award | 16,908 | 16,908 | 19 Nov 2025 | Direct |
* marks a reported price that did not pass the local price check.