Cabot Corporation
US ˙ NYSE ˙ US1270551013

SecurityCBT / Cabot Corporation
InstitutionEastern Bank
Latest Disclosed Ownership222,059 shares
Latest Disclosed Value $ 16,723,263
Eastern Bank reports 5.65% decrease in ownership of CBT / Cabot Corporation

On April 7, 2026 - Eastern Bank filed a 13F-HR form disclosing ownership of 222,059 shares of Cabot Corporation (US:CBT) valued at $16,723,263 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 235,345 shares of Cabot Corporation. This represents a change in shares of -5.65% during the quarter. The current value of the position is $18,934,971 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-07 2026-03-31 13F CABOT COM 127055101 222,059 -13,286 -5.65 16,723 7.21 0.2619
2026-01-14 2025-12-31 13F CABOT COM 127055101 235,345 -3,500 -1.47 15,599 -14.13 0.2692
2025-10-27 2025-09-30 13F CABOT COM 127055101 238,845 -8,298 -3.36 18,164 -2.00 0.3227
2025-07-24 2025-06-30 13F CABOT COM 127055101 247,143 -12,000 -4.63 18,536 -13.97 0.3529
2025-05-08 2025-03-31 13F CABOT COM 127055101 259,143 -3,127 -1.19 21,545 -10.03 0.4219
2025-01-13 2024-12-31 13F Cabot COM 127055101 262,270 -7,000 -2.60 23,948 -20.43 0.4450
2024-10-21 2024-09-30 13F Cabot COM 127055101 269,270 229,500 577.07 30,096 723.65 0.5392
2024-07-23 2024-06-30 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 3,654 -0.33 0.1476
2024-05-09 2024-03-31 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 3,667 10.42 0.1526
2024-01-25 2023-12-31 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 3,321 20.55 0.1508
2023-10-17 2023-09-30 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 2,755 3.53 0.1369
2023-07-19 2023-06-30 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 2,660 -12.70 0.1265
2023-04-19 2023-03-31 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 3,048 14.64 0.1531
2023-01-24 2022-12-31 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 2,658 4.60 0.1419
2022-10-19 2022-09-30 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 2,541 0.16 0.1450
2022-07-20 2022-06-30 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 2,537 -6.76 0.1350
2022-04-21 2022-03-31 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 2,721 21.74 0.1262
2022-01-26 2021-12-31 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 2,235 12.14 0.0975
2021-10-19 2021-09-30 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 1,993 -11.97 0.0963
2021-07-20 2021-06-30 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 2,264 8.53 0.1110
2021-04-27 2021-03-31 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 2,086 16.86 0.1127
2021-01-20 2020-12-31 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 1,785 24.56 0.0999
2020-10-30 2020-09-30 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 1,433 -2.72 0.0877
2020-09-01 2020-06-30 13F/A-1 CABOT COMMON STOCKS 127055101 39,770 0 0.00 1,473 41.77 0.0958
2020-07-21 2020-06-30 13F CABOT COMMON STOCKS 127055101 39,770 0 1,473 95,811.8575
2020-04-27 2020-03-31 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 1,039 -45.03 0.0774
2020-02-04 2019-12-31 13F CABOT COMMON STOCKS 127055101 39,770 0 0.00 1,890 4.88 0.1098
2019-11-04 2019-09-30 13F CABOT COMMON STOCKS 127055101 39,770 -34,348 -46.34 1,802 -49.04 0.1124
2019-07-24 2019-06-30 13F CABOT COMMON STOCKS 127055101 74,118 -34,116 -31.52 3,536 -21.53 0.2249
2019-04-18 2019-03-31 13F CABOT COMMON STOCKS 127055101 108,234 0 0.00 4,506 -3.06 0.3020
2019-01-18 2018-12-31 13F CABOT COMMON STOCKS 127055101 108,234 0 0.00 4,648 -31.53 0.3471
2018-10-16 2018-09-30 13F CABOT COMMON STOCKS 127055101 108,234 0 0.00 6,788 1.53 0.4428
2018-07-18 2018-06-30 13F CABOT COMMON STOCKS 127055101 108,234 0 0.00 6,686 10.86 0.4568
2018-04-09 2018-03-31 13F CABOT COMMON STOCKS 127055101 108,234 0 0.00 6,031 -9.53 0.4218
2018-01-22 2017-12-31 13F CABOT COMMON STOCKS 127055101 108,234 -5,000 -4.42 6,666 5.51 0.4468
2017-10-24 2017-09-30 13F CABOT COMMON STOCKS 127055101 113,234 0 0.00 6,318 4.43 0.4474
2017-07-26 2017-06-30 13F CABOT COMMON STOCKS 127055101 113,234 -4,090 -3.49 6,050 -13.93 0.4453
2017-04-17 2017-03-31 13F CABOT COMMON STOCKS 127055101 117,324 0 0.00 7,029 18.53 0.5305
2017-01-18 2016-12-31 13F CABOT COMMON STOCKS 127055101 117,324 0 0.00 5,930 -3.56 0.4614
2016-10-17 2016-09-30 13F CABOT COMMON STOCKS 127055101 117,324 0 0.00 6,149 14.78 0.4942
2016-07-15 2016-06-30 13F CABOT COMMON STOCKS 127055101 117,324 0 0.00 5,357 -5.52 0.4327
2016-04-14 2016-03-31 13F CABOT COMMON STOCKS 127055101 117,324 0 0.00 5,670 18.22 0.4624
2016-01-20 2015-12-31 13F CABOT COMMON STOCKS 127055101 117,324 0 0.00 4,796 29.52 0.3992
2015-10-16 2015-09-30 13F CABOT COMMON STOCKS 127055101 117,324 0 0.00 3,703 -15.36 0.3228
2015-07-16 2015-06-30 13F CABOT COMMON STOCKS 127055101 117,324 0 0.00 4,375 -17.14 0.3534
2015-04-17 2015-03-31 13F CABOT COMMON STOCKS 127055101 117,324 0 0.00 5,280 2.60 0.4229
2015-01-12 2014-12-31 13F CABOT COMMON STOCKS 127055101 117,324 0 0.00 5,146 -13.61 0.4084
2014-10-15 2014-09-30 13F CABOT COMMON STOCKS 127055101 117,324 0 0.00 5,957 -12.45 0.4814
2014-07-16 2014-06-30 13F CABOT COMMON STOCKS 127055101 117,324 0 0.00 6,804 -1.80 0.5510
2014-04-17 2014-03-31 13F CABOT COMMON STOCKS 127055101 117,324 0 0.00 6,929 14.91 0.5838
2014-01-21 2013-12-31 13F CABOT COMMON STOCKS 127055101 117,324 0 0.00 6,030 20.34 0.5138
2013-10-18 2013-09-30 13F CABOT COMMON STOCKS 127055101 117,324 0 0.00 5,011 14.15 0.4596
2013-08-09 2013-06-30 13F CABOT COMMON STOCKS 127055101 117,324 117,324 4,390 0.4084
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.