IDEX CORP IEX
COM · Common Stock · CUSIP 45167R104 · ISIN US45167R1041
Publicly listed company that makes fluidics systems and specialty engineered products
- SectorIndustrials
- IndustryPumps & Pumping Equipment
- HeadquartersNorthbrook, IL
- Founded1988
- Websiteidexcorp.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($14.6m this quarter). Holder counts are more reliable. Shares outstanding: 74.8m as of 2025-10-24, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $164.48. Options: 4 managers hold calls ($4.5m notional), 4 hold puts ($1.5m).
Trends to Q3 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 558 |
| Q4 2022 | 616 |
| Q1 2023 | 617 |
| Q2 2023 | 641 |
| Q3 2023 | 622 |
| Q4 2023 | 622 |
| Q1 2024 | 626 |
| Q2 2024 | 633 |
| Q3 2024 | 617 |
| Q4 2024 | 632 |
| Q1 2025 | 642 |
| Q2 2025 | 641 |
| Q3 2025 | 635 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2023 | 256 | 316 |
| Q1 2024 | 268 | 272 |
| Q2 2024 | 311 | 258 |
| Q3 2024 | 272 | 312 |
| Q4 2024 | 258 | 276 |
| Q1 2025 | 293 | 292 |
| Q2 2025 | 332 | 283 |
| Q3 2025 | 284 | 326 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q4 2024 | $7.3m | $6.0m | 0.82 |
| Q1 2025 | $3.7m | $2.0m | 0.55 |
| Q2 2025 | $3.6m | $2.8m | 0.79 |
| Q3 2025 | $4.5m | $1.5m | 0.33 |
Biggest buyers
| NORDEA INVESTMENT MANAGEMENT AB | Added | +1.6m |
| PRIMECAP MANAGEMENT CO/CA/ | Added | +1.2m |
| Dodge & Cox | New | +344.3k |
| JPMORGAN CHASE & CO | Added | +331.3k |
| TWO SIGMA INVESTMENTS, LP | Added | +269.1k |
| Invesco Ltd. | Added | +250.4k |
| CITADEL ADVISORS LLC | Added | +246.5k |
| Amundi | Added | +239.2k |
| MORGAN STANLEY | Added | +237.3k |
| WELLINGTON MANAGEMENT GROUP LLP | Added | +211.7k |
Biggest sellers
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | -1.6m |
| BARCLAYS PLC | Reduced | -979.3k |
| T. Rowe Price Investment Management, Inc. | Reduced | -852.4k |
| KING LUTHER CAPITAL MANAGEMENT CORP | Reduced | -368.9k |
| Qube Research & Technologies Ltd | Reduced | -341.1k |
| MILLENNIUM MANAGEMENT LLC | Reduced | -339.6k |
| Clearbridge Investments, LLC | Sold out | -328.4k |
| GW&K Investment Management, LLC | Reduced | -318.1k |
| FIL Ltd | Reduced | -217.2k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Reduced | -157.1k |
Biggest calls
| UBS Group AG | Unchanged | $2.0m12.3k shares |
| CITADEL ADVISORS LLC | Added | $1.7m10.3k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $651.0k4.0k shares |
| GROUP ONE TRADING LLC | New | $146.5k900 shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $992.8k6.1k shares |
| CITADEL ADVISORS LLC | Added | $374.3k2.3k shares |
| Walleye Trading LLC | Reduced | $97.7k600 shares |
| GROUP ONE TRADING LLC | Reduced | $16.3k100 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-30 | 7.5% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.1% |
Fell to 5% or below in the last year: WELLINGTON MANAGEMENT GROUP LLP (2.3%, 2026-05-15), VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD CAPITAL MANAGEMENT LLC)
Insider purchases and sales in Q3 2025
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2023 | 0 | — | 0 | — | — |
| Q1 2024 | 0 | — | 0 | — | — |
| Q2 2024 | 0 | — | 0 | — | — |
| Q3 2024 | 0 | — | 0 | — | — |
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 1 | $45.2k | — |
| Q3 2025 | 1 | $399.0k | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2025-08-07 | Helmkamp Katrina L Director | Bought | $399.0k2.5k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q3 2025
| Manager | Shares | Change |
|---|---|---|
| VANGUARD GROUP INC 0.02% of their portfolio | 9.1m $1.5bn | Reduced -98.5k |
| WELLINGTON MANAGEMENT GROUP LLP 0.18% of their portfolio | 6.5m $1.1bn | Added +211.7k |
| BlackRock, Inc. 0.02% of their portfolio | 5.7m $924.6m | Reduced -105.1k |
| MORGAN STANLEY 0.03% of their portfolio | 3.4m $548.6m | Added +237.3k |
| STATE STREET CORP 0.02% of their portfolio | 3.2m $513.5m | Added +55.0k |
| NORDEA INVESTMENT MANAGEMENT AB 0.33% of their portfolio | 2.4m $382.0m | Added +1.6m |
| GEODE CAPITAL MANAGEMENT, LLC 0.02% of their portfolio | 2.0m $328.6m | Added +26.2k |
| Impax Asset Management Group plc 1.86% of their portfolio | 2.0m $319.1m | Reduced -5.6k |
| VAN ECK ASSOCIATES CORP 0.29% of their portfolio | 1.9m $311.4m | Added +146.6k |
| Invesco Ltd. 0.05% of their portfolio | 1.8m $294.6m | Added +250.4k |
| PRIMECAP MANAGEMENT CO/CA/ 0.22% of their portfolio | 1.7m $281.7m | Added +1.2m |
| Amundi 0.08% of their portfolio | 1.5m $248.8m | Added +239.2k |
| FIRST TRUST ADVISORS LP 0.12% of their portfolio | 1.0m $163.2m | Added +58.6k |
| Champlain Investment Partners, LLC 1.16% of their portfolio | 941.9k $153.3m | Reduced -64.4k |
| Fenimore Asset Management Inc 2.85% of their portfolio | 874.7k $142.4m | Added +2.0k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 814.1k $132.5m | Added +331.3k |
| FLOSSBACH VON STORCH SE 0.51% of their portfolio | 791.0k $128.7m | Added +150.2k |
| NORTHERN TRUST CORP 0.02% of their portfolio | 766.0k $124.7m | Reduced -6.7k |
| Pictet Asset Management Holding SA 0.12% of their portfolio | 739.3k $120.3m | Added +79.5k |
| Fisher Asset Management, LLC 0.04% of their portfolio | 724.8k $118.0m | Added +17.6k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.02% of their portfolio | 693.1k $112.8m | Reduced -157.1k |
| Alecta Tjanstepension Omsesidigt 0.50% of their portfolio | 689.9k $112.2m | Unchanged |
| GOLDMAN SACHS GROUP INC 0.02% of their portfolio | 685.3k $111.5m | Added +195.9k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.02% of their portfolio | 659.0k $107.3m | Reduced -2.1k |
| T. Rowe Price Investment Management, Inc. 0.06% of their portfolio | 636.9k $103.7m | Reduced -852.4k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 620.2k $100.9m | Added +17.6k |
| Bank of New York Mellon Corp 0.02% of their portfolio | 616.1k $100.3m | Reduced -38.1k |
| UBS Group AG 0.02% of their portfolio | 608.3k $99.0m | Reduced -89.6k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.13% of their portfolio | 510.4k $83.1m | Added +7.0k |
| Legal & General Group Plc 0.02% of their portfolio | 496.5k $80.8m | Added +19.2k |
| SNYDER CAPITAL MANAGEMENT L P 1.51% of their portfolio | 489.7k $79.7m | Reduced -8.2k |
| Findlay Park Partners LLP 0.76% of their portfolio | 444.9k $72.4m | Reduced -8.0k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.23% of their portfolio | 422.9k $68.8m | Added +191.0k |
| WEITZ INVESTMENT MANAGEMENT, INC. 3.59% of their portfolio | 406.5k $66.2m | Added +250 |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 401.7k $65.4m | Reduced -72 |
| WESTFIELD CAPITAL MANAGEMENT CO LP 0.27% of their portfolio | 398.3k $64.8m | Reduced -40.4k |
| DEUTSCHE BANK AG\ 0.02% of their portfolio | 389.2k $63.3m | Added +8.6k |
| Boston Trust Walden Corp 0.46% of their portfolio | 382.2k $62.2m | Added +729 |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 374.1k $60.9m | Reduced -1.6m |
| BARCLAYS PLC 0.02% of their portfolio | 353.9k $57.6m | Reduced -979.3k |
| Dodge & Cox 0.03% of their portfolio | 344.3k $56.0m | New |
| DEPRINCE RACE & ZOLLO INC 1.12% of their portfolio | 344.2k $56.0m | Added +47.2k |
| CITADEL ADVISORS LLC 0.04% of their portfolio | 336.9k $54.8m | Added +246.5k |
| STATE FARM MUTUAL AUTOMOBILE INSURANCE CO 0.05% of their portfolio | 335.9k $54.7m | Unchanged |
| TWO SIGMA INVESTMENTS, LP 0.08% of their portfolio | 329.3k $53.6m | Added +269.1k |
| SCHRODER INVESTMENT MANAGEMENT GROUP 0.04% of their portfolio | 316.2k $51.3m | Added +1.1k |
| Qube Research & Technologies Ltd 0.07% of their portfolio | 311.6k $50.7m | Reduced -341.1k |
| JOHNSON INVESTMENT COUNSEL INC 0.41% of their portfolio | 302.9k $49.3m | Reduced -7.8k |
| Squarepoint Ops LLC 0.10% of their portfolio | 290.1k $47.2m | Added +25.6k |
| Allianz Asset Management GmbH 0.06% of their portfolio | 288.6k $47.0m | Reduced -156.4k |
| Ensign Peak Advisors, Inc 0.07% of their portfolio | 273.7k $44.5m | Reduced -29.2k |
| Robeco Schweiz AG 0.99% of their portfolio | 271.1k $44.1m | Added +33.8k |
| MILLENNIUM MANAGEMENT LLC 0.03% of their portfolio | 270.2k $44.0m | Reduced -339.6k |
| Premier Fund Managers Ltd 1.74% of their portfolio | 261.6k $42.5m | Reduced -39.7k |
| HSBC HOLDINGS PLC 0.02% of their portfolio | 254.0k $41.3m | Added +3.8k |
| D. E. Shaw & Co., Inc. 0.03% of their portfolio | 250.8k $40.8m | Added +168.7k |
| Maren Capital LLC 2.26% of their portfolio | 248.9k $40.5m | Added +12.9k |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.06% of their portfolio | 244.5k $39.8m | Added +175.3k |
| KING LUTHER CAPITAL MANAGEMENT CORP 0.16% of their portfolio | 238.1k $38.7m | Reduced -368.9k |
| Corient Private Wealth LP 0.06% of their portfolio | 222.9k $36.3m | Added +1.1k |
| TWO SIGMA ADVISERS, LP 0.07% of their portfolio | 221.0k $36.0m | Added +57.3k |
| BAMCO INC /NY/ 0.09% of their portfolio | 218.9k $35.6m | Reduced -2.1k |
| Swiss National Bank 0.02% of their portfolio | 217.8k $35.4m | Reduced -10.2k |
| BROWN ADVISORY INC 0.04% of their portfolio | 198.8k $32.4m | Reduced -9.3k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.02% of their portfolio | 194.0k $31.6m | Added +82.8k |
| GABELLI FUNDS LLC 0.21% of their portfolio | 190.9k $31.1m | Reduced -2.5k |
| California Public Employees Retirement System 0.02% of their portfolio | 178.8k $29.1m | Reduced -5.6k |
| Sumitomo Mitsui Trust Group, Inc. 0.02% of their portfolio | 174.6k $28.4m | Added +1.3k |
| GAMCO INVESTORS, INC. ET AL 0.28% of their portfolio | 174.4k $28.4m | Reduced -750 |
| CIBC Private Wealth Group LLC 0.05% of their portfolio | 172.3k $28.0m | Reduced -4.7k |
| RHUMBLINE ADVISERS 0.02% of their portfolio | 170.7k $27.8m | Reduced -7.3k |
| RENAISSANCE TECHNOLOGIES LLC 0.04% of their portfolio | 170.4k $27.7m | Added +161.9k |
| Evelyn Partners Investment Management LLP 0.78% of their portfolio | 169.7k $27.6m | Reduced -7.3k |
| Nuveen, LLC 0.01% of their portfolio | 163.1k $26.5m | Reduced -814 |
| FIL Ltd 0.02% of their portfolio | 162.9k $26.5m | Reduced -217.2k |
| NUANCE INVESTMENTS, LLC 2.69% of their portfolio | 162.6k $26.5m | Added +82.2k |
| ASR Vermogensbeheer N.V. 0.32% of their portfolio | 159.9k $26.0m | Added +18.5k |
| AE Wealth Management LLC 0.16% of their portfolio | 158.8k $25.9m | Added +6.4k |
| BLI - Banque de Luxembourg Investments 0.73% of their portfolio | 154.8k $25.1m | Added +61.8k |
| Universal- Beteiligungs- und Servicegesellschaft mbH 0.04% of their portfolio | 154.1k $25.1m | Added +557 |
| Mitsubishi UFJ Asset Management Co., Ltd. 0.02% of their portfolio | 153.6k $25.0m | Added +11.8k |
| SEI INVESTMENTS CO 0.03% of their portfolio | 152.1k $24.8m | Added +8.7k |
| BNP PARIBAS FINANCIAL MARKETS 0.02% of their portfolio | 150.6k $24.5m | Added +50.8k |
| Zurcher Kantonalbank (Zurich Cantonalbank) 0.06% of their portfolio | 149.8k $24.4m | Reduced -21.6k |
| COMERICA BANK 0.09% of their portfolio | 140.1k $22.8m | Reduced -2.0k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.02% of their portfolio | 136.2k $22.2m | Reduced -37 |
| NICHOLAS COMPANY, INC. 0.37% of their portfolio | 132.6k $21.6m | Added +29.0k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 128.2k $20.9m | Reduced -9.7k |
| Lombard Odier Asset Management (Europe) Ltd 0.75% of their portfolio | 127.0k $14.6m | Added +86.8k |
| MOUNTAIN PACIFIC INVESTMENT ADVISERS LLC 3.09% of their portfolio | 121.2k $19.7m | Reduced -120.1k |
| AQR CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 118.2k $19.2m | Added +77.4k |
| CANADA LIFE ASSURANCE Co 0.03% of their portfolio | 116.8k $19.0m | Added +3.5k |
| DF DENT & CO INC 0.24% of their portfolio | 116.2k $18.9m | Reduced -16.5k |
| CITIGROUP INC 0.01% of their portfolio | 114.6k $18.7m | Added +15.3k |
| Northwest & Ethical Investments L.P. 0.44% of their portfolio | 113.5k $18.5m | Unchanged |
| DekaBank Deutsche Girozentrale 0.03% of their portfolio | 113.0k $18.2m | Unchanged |
| Port Capital LLC 0.74% of their portfolio | 109.8k $17.9m | Reduced -71.6k |
| Russell Investments Group, Ltd. 0.02% of their portfolio | 109.7k $17.9m | Added +33.9k |
| HARVEY INVESTMENT CO LLC 1.90% of their portfolio | 109.3k $17.8m | Added +21.6k |
| Thematics Asset Management 0.80% of their portfolio | 108.2k $17.6m | Added +11.0k |