IDEX Corporation
MX ˙ BMV ˙ US45167R1041
SecurityMX:IEX / IDEX Corporation
InstitutionPort Capital LLC
Latest Disclosed Ownership110,728 shares
Latest Disclosed Value $ 20,988,492
Port Capital LLC reports 1.44% increase in ownership of IEX / IDEX Corporation

On May 15, 2026 - Port Capital LLC filed a 13F-HR form disclosing ownership of 110,728 shares of IDEX Corporation (MX:IEX) valued at $20,988,492 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 109,158 shares of IDEX Corporation. This represents a change in shares of 1.44% during the quarter.

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 IDEX COM 45167R104 110,728 1,570 1.44 20,988 8.06 0.9333
2026-02-17 2025-12-31 13F IDEX COM 45167R104 109,158 -633 -0.58 19,424 8.69 0.8377
2025-11-14 2025-09-30 13F IDEX COM 45167R104 109,791 -71,644 -39.49 17,870 -43.90 0.7448
2025-08-14 2025-06-30 13F IDEX COM 45167R104 181,435 1,455 0.81 31,855 -2.20 1.3546
2025-05-15 2025-03-31 13F IDEX COM 45167R104 179,980 -14,160 -7.29 32,571 -19.84 1.4768
2025-02-14 2024-12-31 13F IDEX COM 45167R104 194,140 3,489 1.83 40,632 -0.64 1.8545
2024-11-14 2024-09-30 13F IDEX COM 45167R104 190,651 470 0.25 40,895 6.88 1.8329
2024-08-14 2024-06-30 13F IDEX CORP COM COM 45167R104 190,181 -3,464 -1.79 38,264 -19.02 1.9171
2024-05-15 2024-03-31 13F IDEX CORP COM COM 45167R104 193,645 -37,393 -16.18 47,253 -5.80 2.3686
2024-02-15 2023-12-31 13F IDEX CORP COM COM 45167R104 231,038 -22,092 -8.73 50,161 -4.74 2.7983
2023-11-14 2023-09-30 13F IDEX CORP COM COM 45167R104 253,130 -77,943 -23.54 52,656 -26.11 3.2865
2023-08-14 2023-06-30 13F IDEX CORP COM COM 45167R104 331,073 15,786 5.01 71,267 -2.16 4.2876
2023-05-15 2023-03-31 13F IDEX CORP COM COM 45167R104 315,287 14,532 4.83 72,841 6.07 4.7336
2023-02-15 2022-12-31 13F IDEX CORP COM COM 45167R104 300,755 3,585 1.21 68,671 15.63 4.9639
2022-11-14 2022-09-30 13F IDEX CORP COM COM 45167R104 297,170 3,475 1.18 59,389 11.33 4.8220
2022-08-15 2022-06-30 13F IDEX CORP COM COM 45167R104 293,695 -3,450 -1.16 53,344 -6.37 4.1771
2022-05-16 2022-03-31 13F IDEX CORP COM COM 45167R104 297,145 -10,538 -3.42 56,972 -21.65 3.9389
2022-02-14 2021-12-31 13F IDEX CORP COM COM 45167R104 307,683 -179,503 -36.84 72,712 -27.88 4.4719
2021-11-15 2021-09-30 13F IDEX CORP COM COM 45167R104 487,186 41,872 9.40 100,823 2.89 5.0892
2021-08-16 2021-06-30 13F IDEX CORP COM COM 45167R104 445,314 -3,731 -0.83 97,991 4.25 5.1022
2021-05-17 2021-03-31 13F IDEX CORP COM COM 45167R104 449,045 133,817 42.45 93,994 49.69 5.3215
2021-02-16 2020-12-31 13F IDEX CORP COM COM 45167R104 315,228 10,800 3.55 62,793 13.08 4.2731
2020-11-16 2020-09-30 13F IDEX CORP COM COM 45167R104 304,428 -761 -0.25 55,531 15.13 4.7842
2020-08-17 2020-06-30 13F/A-1 IDEX CORP COM COM 45167R104 305,189 87,300 40.07 48,232 60.28 4.6481
2020-08-14 2020-06-30 13F IDEX CORP COM COM 45167R104 228,489 10,600 36,110 4,185,477.7483
2020-05-15 2020-03-31 13F IDEX CORP COM COM 45167R104 217,889 41,737 23.69 30,093 -0.68 4.1855
2020-02-14 2019-12-31 13F IDEX CORP COM COM 45167R104 176,152 28,130 19.00 30,298 24.90 3.3433
2019-11-14 2019-09-30 13F IDEX CORP COM COM 45167R104 148,022 3,381 2.34 24,258 -2.57 2.7685
2019-08-14 2019-06-30 13F IDEX CORP COM COM 45167R104 144,641 580 0.40 24,899 13.90 2.9350
2019-05-15 2019-03-31 13F IDEX CORP COM COM 45167R104 144,061 4,740 3.40 21,860 24.27 2.8590
2019-02-13 2018-12-31 13F IDEX COM 45167R104 139,321 50,125 56.20 17,591 30.90 2.6741
2018-11-14 2018-09-30 13F IDEX CORP COM COM 45167R104 89,196 1,530 1.75 13,438 12.31 1.6288
2018-07-11 2018-06-30 13F IDEX COM 45167R104 87,666 7,350 9.15 11,965 4.53 1.5630
2018-05-08 2018-03-31 13F/A-1 IDEX COM 45167R104 80,316 -3,060 -3.67 11,446 4.03 1.6185
2018-05-07 2018-03-31 13F IDEX CORP COM COM 45167R104 80,316 -3,060 11,446
2018-03-01 2017-12-31 13F/A-1 IDEX CORP COM COM 45167R104 83,376 83,376 11,003 1.5544
2018-01-25 2017-12-31 13F IDEX CORP COM COM 45167R104 54,245 7,159 3.1927
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.