RPM International Inc.
US ˙ NYSE ˙ US7496851038

SecurityRPM / RPM International Inc.
InstitutionFirst Manhattan Co
Latest Disclosed Ownership117,642 shares
Latest Disclosed Value $ 11,693,615
First Manhattan Co reports 8.38% decrease in ownership of RPM / RPM International Inc.

On May 15, 2026 - First Manhattan Co filed a 13F-HR form disclosing ownership of 117,642 shares of RPM International Inc. (US:RPM) valued at $11,693,615 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 128,401 shares of RPM International Inc.. This represents a change in shares of -8.38% during the quarter. The current value of the position is $12,212,416 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)
2026-05-15 2026-03-31 13F RPM INTL COM 749685103 117,642 -10,759 -8.38 11,694 -12.43 0.0324
2026-02-17 2025-12-31 13F RPM INTL COM 749685103 128,401 -3,148 -2.39 13,354 -13.88 0.0351
2025-11-14 2025-09-30 13F RPM INTL COM 749685103 131,549 -5,484 -4.00 15,507 3.02 0.0410
2025-08-14 2025-06-30 13F RPM INTL COM 749685103 137,033 -17,115 -11.10 15,052 -15.59 0.0425
2025-05-15 2025-03-31 13F RPM INTL COM 749685103 154,148 -2,179 -1.39 17,832 -7.31 0.0520
2025-02-14 2024-12-31 13F RPM INTL COM 749685103 156,327 -2,746 -1.73 19,238 -0.05 0.0564
2024-11-14 2024-09-30 13F RPM INTL COM 749685103 159,073 -1,255 -0.78 19,248 11.49 0.0571
2024-08-15 2024-06-30 13F/A-1 RPM INTL COM 749685103 160,328 1,663 1.05 17,264 -8.53 0.0554
2024-08-14 2024-06-30 13F RPM INTL COM 749685103 160,328 1,663 17,264 0.0554
2024-05-15 2024-03-31 13F RPM INTL COM 749685103 158,665 -3,426 -2.11 18,874 4.29 0.0612
2024-02-13 2023-12-31 13F RPM INTL COM 749685103 162,091 2,176 1.36 18,098 19.37 0.0628
2023-11-14 2023-09-30 13F RPM INTL COM 749685103 159,915 1,431 0.90 15,162 6.62 0.0560
2023-08-14 2023-06-30 13F RPM INTL COM 749685103 158,484 -2,120 -1.32 14,221 1.49 0.0521
2023-05-15 2023-03-31 13F RPM INTL COM 749685103 160,604 -13,761 -7.89 14,011 -17.54 0.0537
2023-02-14 2022-12-31 13F RPM INTL COM 749685103 174,365 -1,421 -0.81 16,992 16.03 0.0623
2022-11-14 2022-09-30 13F RPM INTL COM 749685103 175,786 -2,974 -1.66 14,644 4.06 0.0620
2022-08-15 2022-06-30 13F RPM INTL COM 749685103 178,760 -137 -0.08 14,072 -3.41 0.0567
2022-05-16 2022-03-31 13F RPM INTL COM 749685103 178,897 8,433 4.95 14,569 -15.38 0.0477
2022-02-14 2021-12-31 13F RPM INTL COM 749685103 170,464 6,399 3.90 17,216 35.14 0.0567
2021-11-15 2021-09-30 13F RPM INTL COM 749685103 164,065 1,603 0.99 12,739 -11.58 0.0469
2021-08-16 2021-06-30 13F RPM INTL COM 749685103 162,462 54,638 50.67 14,407 45.48 0.0526
2021-05-14 2021-03-31 13F RPM INTL COM 749685103 107,824 -57 -0.05 9,903 1.12 0.0427
2021-02-16 2020-12-31 13F RPM INTL COM 749685103 107,881 -3,589 -3.22 9,793 6.05 0.0469
2020-11-12 2020-09-30 13F RPM INTERNATIONAL COMMON 749685103 111,470 -430 -0.38 9,234 9.94 0.0476
2020-08-14 2020-06-30 13F RPM INTERNATIONAL COMMON 749685103 111,900 -251 -0.22 8,399 25.87 0.0485
2020-05-06 2020-03-31 13F RPM INTERNATIONAL COMMON 749685103 112,151 -497 -0.44 6,673 -22.82 0.0432
2020-02-13 2019-12-31 13F RPM INTERNATIONAL COMMON 749685103 112,648 -2,247 -1.96 8,646 9.37 0.0434
2019-11-13 2019-09-30 13F RPM INTERNATIONAL COMMON 749685103 114,895 -6,496 -5.35 7,905 6.57 0.0435
2019-08-16 2019-06-30 13F RPM INTERNATIONAL COMMON 749685103 121,391 -746 -0.61 7,418 4.66 0.0412
2019-04-12 2019-03-31 13F RPM INTERNATIONAL COMMON 749685103 122,137 -196 -0.16 7,088 -1.42 0.0409
2019-01-30 2018-12-31 13F RPM INTERNATIONAL COMMON 749685103 122,333 -446 -0.36 7,190 -9.82 0.0448
2018-10-15 2018-09-30 13F RPM INTERNATIONAL COMMON 749685103 122,779 2,453 2.04 7,973 13.62 0.0425
2018-08-01 2018-06-30 13F RPM INTERNATIONAL COMMON 749685103 120,326 355 0.30 7,017 22.70 0.0405
2018-04-20 2018-03-31 13F RPM INTERNATIONAL COMMON 749685103 119,971 19,154 19.00 5,719 8.23 0.0325
2018-01-22 2017-12-31 13F RPM INTERNATIONAL COMMON 749685103 100,817 4,665 4.85 5,284 7.05 0.0290
2017-10-25 2017-09-30 13F RPM INTERNATIONAL COMMON 749685103 96,152 3 0.00 4,936 -5.87 0.0283
2017-08-10 2017-06-30 13F/A-2 RPM INTERNATIONAL COMMON 749685103 96,149 4 0.00 5,244 -0.87 0.0306
2017-08-01 2017-06-30 13F/A-1 RPM INTERNATIONAL COMMON 749685103 96,149 0 5,244 0.0306
2017-07-28 2017-06-30 13F RPM INTERNATIONAL COMMON 749685103 96,149 4 5,244
2017-04-25 2017-03-31 13F/A-1 RPM INTERNATIONAL COMMON 749685103 96,145 -1,043 -1.07 5,290 1.13 0.0314
2017-04-24 2017-03-31 13F RPM INTERNATIONAL COMMON 749685103 97,388 5,231
2017-01-25 2016-12-31 13F RPM INTERNATIONAL COMMON 749685103 97,188 -200 -0.21 5,231 0.00 0.0318
2016-10-20 2016-09-30 13F RPM INTERNATIONAL COMMON 749685103 97,388 -4,315 -4.24 5,231 2.97 0.0319
2016-07-14 2016-06-30 13F RPM INTERNATIONAL COMMON 749685103 101,703 -500 -0.49 5,080 5.02 0.0312
2016-04-22 2016-03-31 13F RPM INTERNATIONAL COMMON 749685103 102,203 12,962 14.52 4,837 23.05 0.0298
2016-01-20 2015-12-31 13F RPM INTERNATIONAL COMMON 749685103 89,241 -4,030 -4.32 3,931 0.61 0.0241
2015-10-26 2015-09-30 13F RPM INTERNATIONAL COMMON 749685103 93,271 2,845 3.15 3,907 -11.77 0.0251
2015-07-17 2015-06-30 13F RPM INTERNATIONAL COMMON 749685103 90,426 -472 -0.52 4,428 1.51 0.0261
2015-04-30 2015-03-31 13F RPM INTERNATIONAL COMMON 749685103 90,898 0 0.00 4,362 -5.36 0.0251
2015-01-20 2014-12-31 13F RPM INTERNATIONAL COMMON 749685103 90,898 -210 -0.23 4,609 10.53 0.0261
2014-10-23 2014-09-30 13F RPM INTERNATIONAL COMMON 749685103 91,108 155 0.17 4,170 -0.71 0.0243
2014-08-14 2014-06-30 13F/A-1 RPM INTERNATIONAL COMMON 749685103 90,953 -893 -0.97 4,200 9.32 0.0266
2014-05-16 2014-03-31 13F RPM INTERNATIONAL COMMON 749685103 91,846 -1,220 -1.31 3,842 -0.54 0.0253
2014-02-04 2013-12-31 13F RPM INTERNATIONAL COMMON 749685103 93,066 -840 -0.89 3,863 13.65 0.0255
2013-10-29 2013-09-30 13F RPM INTERNATIONAL COMMON 749685103 93,906 -188 -0.20 3,399 3.82 0.0237
2013-08-13 2013-06-30 13F RPM INTERNATIONAL COMMON 749685103 94,094 94,094 3,274 0.0225
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.