CAE — Détenteurs institutionnels (13F)

306 déclarants · $6.6B total · Au 30 septembre 2026

Institutions qui déclarent détenir cette action dans leur Formulaire SEC 13F trimestriel. Uniquement les positions longues ; un même déclarant peut apparaître deux fois pour des jambes d'options distinctes. Les jambes put/call compensatoires importantes reflètent généralement la tenue de marché ou un inventaire couvert, pas une conviction directionnelle.

Institution Valeur Actions % de 13F suivies Type
Caisse de depot et placement du Quebec $773 833 970 30 917 402 11,72% Actions
JARISLOWSKY, FRASER Ltd $620 290 230 20 943 262 9,39% Actions
1832 Asset Management L.P. $490 158 790 19 559 409 7,42% Actions
BRANDES INVESTMENT PARTNERS, LP $461 042 422 18 397 515 6,98% Actions
VANGUARD GROUP INC $406 923 418 13 380 797 6,16% Actions
BROWNING WEST LP $315 927 861 12 606 858 4,78% Actions
MACKENZIE FINANCIAL CORP $281 125 994 7 916 812 4,26% Actions
VANGUARD CAPITAL MANAGEMENT LLC $222 398 908 8 882 455 3,37% Actions
Select Equity Group, L.P. $175 674 890 7 018 338 2,66% Actions
ROYAL BANK OF CANADA $172 630 000 6 888 675 2,61% Actions
BANK OF MONTREAL /CAN/ $149 269 155 5 967 706 2,26% Actions
SNYDER CAPITAL MANAGEMENT L P $123 535 751 4 929 599 1,87% Actions
LETKO, BROSSEAU & ASSOCIATES INC $99 661 571 3 981 832 1,51% Actions
MORGAN STANLEY $92 255 495 3 681 383 1,40% Actions
NATIONAL BANK OF CANADA /FI/ $86 660 713 3 468 309 1,31% Actions
CIBC Asset Management Inc $83 748 653 3 307 675 1,27% Actions
TD Asset Management Inc $82 432 157 3 293 456 1,25% Actions
NORGES BANK $80 614 117 3 222 912 1,22% Actions
Federation des caisses Desjardins du Quebec $78 416 300 3 145 880 1,19% Actions
GEODE CAPITAL MANAGEMENT, LLC $76 183 837 3 054 271 1,15% Actions
Fiera Capital Corp $74 092 255 2 964 525 1,12% Actions
VANGUARD FIDUCIARY TRUST CO $71 285 064 2 847 075 1,08% Actions
DIMENSIONAL FUND ADVISORS LP $67 751 531 2 703 445 1,03% Actions
Invesco Ltd. $67 182 828 2 680 879 1,02% Actions
Connor, Clark & Lunn Investment Management Ltd. $65 214 800 2 607 255 0,99% Actions
FIL Ltd $58 250 021 2 326 474 0,88% Actions
MANUFACTURERS LIFE INSURANCE COMPANY, THE $52 968 334 2 119 718 0,80% Actions
Clearbridge Investments, LLC $51 265 590 2 045 714 0,78% Actions
TD Waterhouse Canada Inc. $50 967 998 2 017 238 0,77% Actions
CANADA PENSION PLAN INVESTMENT BOARD $49 344 896 1 972 782 0,75% Actions
Legal & General Group Plc $46 821 732 1 870 698 0,71% Actions
BANK OF NOVA SCOTIA $42 956 247 1 715 770 0,65% Actions
CIBC WORLD MARKET INC. $41 729 266 1 668 113 0,63% Actions
BANK OF AMERICA CORP /DE/ $40 998 912 1 636 030 0,62% Actions
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ $38 443 065 1 082 639 0,58% Actions
Vanguard Global Advisers, LLC $34 265 404 1 368 536 0,52% Actions
MILLENNIUM MANAGEMENT LLC $33 073 412 1 320 353 0,50% Actions
JPMORGAN CHASE & CO $30 654 137 1 216 434 0,46% Actions
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $26 953 097 1 076 893 0,41% Actions
Artisan Partners Limited Partnership $26 003 510 1 038 566 0,39% Actions
Sunriver Management LLC $24 538 577 979 193 0,37% Actions
PICTON MAHONEY ASSET MANAGEMENT $23 577 268 944 020 0,36% Actions
Swiss National Bank $23 369 594 936 100 0,35% Actions
AVIVA PLC $23 129 245 925 311 0,35% Actions
First Eagle Investment Management, LLC $22 994 610 919 313 0,35% Actions
TORONTO DOMINION BANK $21 938 836 877 137 0,33% Actions
CHARLES SCHWAB INVESTMENT MANAGEMENT INC $21 760 878 869 424 0,33% Actions
Public Sector Pension Investment Board $21 062 195 842 056 0,32% Actions
NEW YORK STATE COMMON RETIREMENT FUND $19 901 850 794 168 0,30% Actions
Cresset Asset Management, LLC $18 346 827 732 116 0,28% Actions
VANGUARD ASSET MANAGEMENT, Ltd $17 363 678 693 493 0,26% Actions
GOLDMAN SACHS GROUP INC $16 102 603 642 562 0,24% Actions
DEUTSCHE BANK AG\ $14 569 884 581 400 0,22% Actions
BlackRock, Inc. $14 264 027 569 195 0,22% Actions
Amundi $14 131 209 563 895 0,21% Actions
UBS Group AG $13 932 257 555 956 0,21% Actions
Addenda Capital Inc. $13 466 031 379 218 0,20% Actions
MONTRUSCO BOLTON INVESTMENTS INC. $12 126 587 484 500 0,18% Actions
Waratah Capital Advisors Ltd. $11 941 867 476 531 0,18% Actions
WELLS FARGO & COMPANY/MN $11 932 158 477 320 0,18% Actions
Heathbridge Capital Management Ltd. $11 914 967 476 800 0,18% Actions
CITADEL ADVISORS LLC $11 550 580 460 917 0,17% Actions
MUFG SECURITIES (CANADA), LTD. $11 369 739 454 829 0,17% Actions
Sycale Advisors (NY) LLC $11 189 967 446 527 0,17% Actions
Scheer, Rowlett & Associates Investment Management Ltd. $10 258 508 410 130 0,16% Actions
Quadrature Capital Ltd $10 249 406 409 500 0,16% Actions
BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp $9 847 772 393 709 0,15% Actions
Korea Investment CORP $9 617 322 384 246 0,15% Actions
Converium Capital Inc. $8 750 308 350 000 0,13% Option d'achat
PCJ Investment Counsel Ltd. $8 481 622 339 091 0,13% Actions
FMR LLC $8 385 576 334 915 0,13% Actions
Nuveen, LLC $8 211 972 328 082 0,12% Actions
BARCLAYS PLC $8 113 702 323 771 0,12% Actions
ENVESTNET ASSET MANAGEMENT INC $7 773 275 310 187 0,12% Actions
Bastion Asset Management Inc. $7 644 342 284 801 0,12% Actions
Lansforsakringar Fondforvaltning AB (publ) $7 496 683 299 519 0,11% Actions
Bank of New York Mellon Corp $7 010 109 279 733 0,11% Actions
JONES FINANCIAL COMPANIES LLLP $6 809 938 267 057 0,10% Actions
CIDEL ASSET MANAGEMENT INC $6 736 220 269 136 0,10% Actions
AMERIPRISE FINANCIAL INC $6 513 312 183 705 0,10% Actions
NewGen Asset Management Ltd $6 455 456 257 600 0,10% Actions
Anson Funds Management LP $6 378 593 255 000 0,10% Actions
NORTHERN TRUST CORP $6 314 093 251 959 0,10% Actions
SIG North Trading, ULC $6 124 664 244 400 0,09% Option d'achat
Forge First Asset Management Inc. $5 673 472 191 700 0,09% Actions
AMERICAN CENTURY COMPANIES INC $5 466 424 218 326 0,08% Actions
Trexquant Investment LP $5 094 397 203 288 0,08% Actions
Russell Investments Group, Ltd. $5 036 764 200 600 0,08% Actions
Zurcher Kantonalbank (Zurich Cantonalbank) $5 000 809 199 800 0,08% Actions
Stanley-Laman Group, Ltd. $4 923 689 196 476 0,07% Actions
APG Asset Management N.V. $4 904 958 224 052 0,07% Actions
Polar Asset Management Partners Inc. $4 798 444 191 939 0,07% Actions
Avanza Fonder AB $4 691 432 129 526 0,07% Actions
BANK OF NOVA SCOTIA TRUST CO $4 690 004 187 151 0,07% Actions
Henry James International Management Inc. $4 565 506 182 183 0,07% Actions
SCOTIA CAPITAL INC. $4 537 762 181 709 0,07% Actions
Ramirez Asset Management, Inc. $4 513 895 180 124 0,07% Actions
Northwest & Ethical Investments L.P. $4 401 581 175 885 0,07% Actions
Pictet Asset Management Holding SA $4 226 159 168 850 0,06% Actions
STIFEL FINANCIAL CORP $4 030 040 160 815 0,06% Actions
State of Tennessee, Department of Treasury $3 989 460 159 393 0,06% Actions
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND $3 582 227 142 946 0,05% Actions
Vanguard Investments Australia, Ltd. $3 429 680 136 979 0,05% Actions
ROYCE & ASSOCIATES LP $3 332 019 133 079 0,05% Actions
FRANKLIN RESOURCES INC $3 295 247 131 742 0,05% Actions
Schonfeld Strategic Advisors LLC $3 166 155 126 343 0,05% Actions
Summerhill Capital Management lnc. $3 112 910 124 569 0,05% Actions
Timelo Investment Management Inc. $3 059 826 122 100 0,05% Actions
BNP PARIBAS ASSET MANAGEMENT Holding S.A. $3 043 837 121 722 0,05% Actions
RENAISSANCE TECHNOLOGIES LLC $2 929 088 116 883 0,04% Actions
Quantinno Capital Management LP $2 594 161 103 518 0,04% Actions
RAYMOND JAMES FINANCIAL INC $2 440 267 97 377 0,04% Actions
Swiss Life Asset Management Ltd $2 403 031 96 217 0,04% Actions
LPL Financial LLC $2 311 101 92 223 0,03% Actions
STATE OF WISCONSIN INVESTMENT BOARD $2 277 245 90 984 0,03% Actions
Alberta Investment Management Corp $2 158 706 86 304 0,03% Actions
ROYAL BANK OF CANADA $1 992 000 79 500 0,03% Option de vente
Cardinal Point Capital Management ULC $1 940 705 77 661 0,03% Actions
Polar Asset Management Partners Inc. $1 911 735 76 500 0,03% Option d'achat
D. E. Shaw & Co., Inc. $1 907 781 76 213 0,03% Actions
BANK OF MONTREAL /CAN/ $1 875 961 75 000 0,03% Option de vente
WELLINGTON MANAGEMENT GROUP LLP $1 833 630 73 260 0,03% Actions
Mediolanum International Funds Ltd $1 738 128 69 013 0,03% Actions
AGF MANAGEMENT LTD $1 731 823 48 770 0,03% Actions
Rathbones Group PLC $1 673 255 66 850 0,03% Actions
Pembroke Management, LTD $1 594 944 63 645 0,02% Actions
M&T Bank Corp $1 586 261 63 311 0,02% Actions
OMERS ADMINISTRATION Corp $1 418 147 56 660 0,02% Actions
XTX Topco Ltd $1 383 788 55 219 0,02% Actions
SUSQUEHANNA INTERNATIONAL GROUP, LLP $1 367 850 54 583 0,02% Actions
JANUS HENDERSON GROUP PLC $1 354 926 52 104 0,02% Actions
CITIGROUP INC $1 354 373 54 112 0,02% Actions
Sequoia Financial Advisors, LLC $1 295 352 51 690 0,02% Actions
AUXIER ASSET MANAGEMENT LLC $1 273 800 50 830 0,02% Actions
Investment Management Corp of Ontario $1 150 730 45 919 0,02% Actions
Numerai GP LLC $1 073 245 42 827 0,02% Actions
TWO SIGMA ADVISERS, LP $1 051 194 34 556 0,02% Actions
O'SHAUGHNESSY ASSET MANAGEMENT, LLC $1 029 214 41 070 0,02% Actions
TRANSATLANTIQUE PRIVATE WEALTH LLC $1 023 359 33 641 0,02% Actions
GABELLI FUNDS LLC $995 458 39 723 0,02% Actions
Callan Family Office, LLC $991 550 39 567 0,02% Actions
Fideuram Asset Management (Ireland) dac $913 810 25 817 0,01% Actions
Storgate, LLC $892 412 35 611 0,01% Actions
Schechter Investment Advisors, LLC $862 224 35 064 0,01% Actions
Assenagon Asset Management S.A. $847 688 33 868 0,01% Actions
Banque Transatlantique SA $839 560 33 502 0,01% Actions
Nebula Research & Development LLC $819 560 28 000 0,01% Actions
Bleakley Financial Group, LLC $810 691 32 350 0,01% Actions
Utah Retirement Systems $802 833 32 076 0,01% Actions
Osmosis Investment Management UK Ltd $797 924 31 881 0,01% Actions
ALLIANCEBERNSTEIN L.P. $784 079 30 099 0,01% Actions
Legacy Wealth Asset Management, LLC $771 422 30 783 0,01% Actions
Atria Investments, Inc $733 155 29 256 0,01% Actions
Laird Norton Wetherby Trust Company, LLC $703 058 28 055 0,01% Actions
Henshaw Capital LLC $679 602 27 119 0,01% Actions
Vident Advisory, LLC $673 889 26 921 0,01% Actions
RITHOLTZ WEALTH MANAGEMENT $655 795 26 169 0,01% Actions
Sanctuary Advisors, LLC $649 380 25 913 0,01% Actions
Aviso Financial Inc. $640 151 25 579 0,01% Actions
683 Capital Management, LLC $626 500 25 000 0,01% Actions
Creative Planning $605 926 24 179 0,01% Actions
QUADRANT CAPITAL GROUP LLC $593 646 23 689 0,01% Actions
OPPENHEIMER ASSET MANAGEMENT INC. $590 464 23 562 0,01% Actions
AQR CAPITAL MANAGEMENT LLC $575 947 22 986 0,01% Actions
Gotham Asset Management, LLC $563 224 22 475 0,01% Actions
US BANCORP \DE\ $557 409 22 243 0,01% Actions
IHT Wealth Management, LLC $548 515 21 888 0,01% Actions
WORLDQUANT MILLENNIUM ADVISORS LLC $540 315 21 612 0,01% Actions
State of Wyoming $538 260 21 487 0,01% Actions
Cetera Investment Advisers $532 258 21 239 0,01% Actions
HSBC HOLDINGS PLC $518 141 20 676 0,01% Actions
PEAK6 LLC $516 236 20 600 0,01% Option d'achat
ROYAL BANK OF CANADA $501 000 20 000 0,01% Option d'achat
LANARK FINANCIAL, INC. $482 254 19 244 0,01% Actions
Vanguard Personalized Indexing Management, LLC $480 200 19 162 0,01% Actions
SIG North Trading, ULC $448 724 17 906 0,01% Actions
Metis Global Partners, LLC $447 078 17 863 0,01% Actions
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO $431 511 17 241 0,01% Actions
NEUBERGER BERMAN GROUP LLC $401 316 16 034 0,01% Actions
Pathstone Holdings, LLC $397 076 15 845 0,01% Actions
GREENLEAF TRUST $384 571 15 346 0,01% Actions
Murchinson Ltd. $376 426 15 021 0,01% Actions
Murchinson Ltd. $375 900 15 000 0,01% Option d'achat
Murchinson Ltd. $375 900 15 000 0,01% Option de vente
Ethic Inc. $370 061 14 767 0,01% Actions
JANE STREET GROUP, LLC $363 445 14 503 0,01% Actions
Daiwa Securities Group Inc. $353 697 14 114 0,01% Actions
ROYAL LONDON ASSET MANAGEMENT LTD $351 116 14 011 0,01% Actions
Laird Norton Wetherby Wealth Management, LLC $346 996 11 707 0,01% Actions
Lombard Odier Asset Management (Switzerland) SA $332 676 13 300 0,01% Actions
Cerity Partners LLC $332 320 13 261 0,01% Actions
Principle Wealth Partners LLC $329 589 13 152 0,00% Actions
SIGNATUREFD, LLC $325 580 12 992 0,00% Actions
TRUIST FINANCIAL CORP $318 713 12 718 0,00% Actions
DANSKE BANK A/S $310 090 12 432 0,00% Actions
Corient Private Wealth LP $305 633 12 196 0,00% Actions
Oslo Pensjonsforsikring AS $300 339 12 000 0,00% Actions
Mariner, LLC $295 490 11 791 0,00% Actions
Entropy Technologies, LP $280 396 11 189 0,00% Actions
HighTower Advisors, LLC $279 493 11 153 0,00% Actions
Vise Technologies, Inc. $276 186 11 021 0,00% Actions
&PARTNERS $274 833 10 963 0,00% Actions
FIRST TRUST ADVISORS LP $269 094 10 738 0,00% Actions
Skopos Labs, Inc. $252 373 9 688 0,00% Actions
UniSuper Management Pty Ltd $251 517 7 083 0,00% Actions
Clarius Group, LLC $246 244 10 014 0,00% Actions
Orion Portfolio Solutions, LLC $224 816 8 858 0,00% Actions
Clearstead Advisors, LLC $218 147 8 705 0,00% Actions
Ballentine Partners, LLC $215 566 8 602 0,00% Actions
TWO SIGMA INVESTMENTS, LP $213 010 8 500 0,00% Actions
Kestra Advisory Services, LLC $210 103 8 384 0,00% Actions
PNC Financial Services Group, Inc. $201 157 8 027 0,00% Actions
BNP PARIBAS FINANCIAL MARKETS $180 908 7 219 0,00% Actions
Allworth Financial LP $163 768 6 535 0,00% Actions
Spire Wealth Management $153 693 6 133 0,00% Actions
Beutel, Goodman & Co Ltd. $135 597 5 417 594 0,00% Actions
SITTNER & NELSON, LLC $127 330 5 081 0,00% Actions
TORONTO DOMINION BANK $125 064 5 000 0,00% Option d'achat
SIMPLEX TRADING, LLC $101 192 4 038 0,00% Actions
Tower Research Capital LLC (TRC) $93 399 3 727 0,00% Actions
NATIXIS $93 048 3 713 0,00% Actions
Purpose Unlimited Inc. $87 799 3 490 0,00% Actions
Transamerica Financial Advisors, LLC $80 993 3 232 0,00% Actions
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $70 908 2 722 0,00% Actions
Corient IA LP $66 660 2 660 0,00% Actions
Rockefeller Capital Management L.P. $65 230 2 603 0,00% Actions
AXA Investment Managers S.A. $58 776 1 983 0,00% Actions
Parallel Advisors, LLC $53 378 2 130 0,00% Actions
Cromwell Holdings LLC $53 127 2 120 0,00% Actions
CWM, LLC $48 140 1 848 0,00% Actions
CIBC Private Wealth Group LLC $41 881 1 413 0,00% Actions
Arax Advisory Partners $39 094 1 560 0,00% Actions
BROWN BROTHERS HARRIMAN & CO $38 943 1 554 0,00% Actions
Tacita Capital Inc $37 483 1 500 0,00% Actions
Lindbrook Capital, LLC $36 541 1 486 0,00% Actions
Hillsdale Investment Management Inc. $32 515 1 300 0,00% Actions
STEPH & CO $25 912 1 034 0,00% Actions
TORONTO DOMINION BANK $25 013 1 000 0,00% Option de vente
OSAIC HOLDINGS, INC. $22 928 915 0,00% Actions
FTB Advisors, Inc. $22 420 766 0,00% Actions
Versant Capital Management, Inc $20 144 839 0,00% Actions
NewEdge Advisors, LLC $19 923 795 0,00% Actions
ASSETMARK, INC $17 342 692 0,00% Actions
EverSource Wealth Advisors, LLC $16 089 642 0,00% Actions
MATHER GROUP, LLC. $14 635 584 0,00% Actions
Pinnacle Bancorp, Inc. $14 159 565 0,00% Actions
Caitong International Asset Management Co., Ltd $12 931 516 0,00% Actions
MassMutual Private Wealth & Trust, FSB $12 129 484 0,00% Actions
Manchester Capital Management LLC $12 029 480 0,00% Actions
MONTAG A & ASSOCIATES INC $11 428 456 0,00% Actions
Cullen/Frost Bankers, Inc. $11 427 456 0,00% Actions
Farther Finance Advisors, LLC $11 302 451 0,00% Actions
Addison Advisors LLC $11 277 450 0,00% Actions
ROTHSCHILD INVESTMENT LLC $10 024 400 0,00% Actions
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO $9 072 362 0,00% Actions
HARBOUR INVESTMENTS, INC. $8 426 336 0,00% Actions
Anchor Investment Management, LLC $6 866 274 0,00% Actions
Elequin Capital, LP $6 390 255 0,00% Actions
Washington Trust Advisors, Inc. $5 238 209 0,00% Actions
Parkside Financial Bank & Trust $4 211 168 0,00% Actions
NATIXIS ADVISORS, LLC $3 955 157 824 0,00% Actions
Blue Trust, Inc. $3 809 152 0,00% Actions
CANADA LIFE ASSURANCE Co $3 709 148 768 0,00% Actions
FIDUCIARY FINANCIAL ADVISORS $3 008 120 0,00% Actions
BI Asset Management Fondsmaeglerselskab A/S $2 966 118 344 0,00% Actions
Steward Partners Investment Advisory, LLC $2 907 116 0,00% Actions
Bell Investment Advisors, Inc $2 907 116 0,00% Actions
Smartleaf Asset Management LLC $2 722 108 0,00% Actions
TD PRIVATE CLIENT WEALTH LLC $2 381 95 0,00% Actions
ELEVATION WEALTH PARTNERS, LLC $2 306 92 0,00% Actions
Mn Services Vermogensbeheer B.V. $2 115 84 511 0,00% Actions
JFS WEALTH ADVISORS, LLC $1 980 76 0,00% Actions
Claret Asset Management Corp $1 917 76 557 0,00% Actions
HANTZ FINANCIAL SERVICES, INC. $1 883 75 122 0,00% Actions
Cornerstone Planning Group LLC $1 845 76 0,00% Actions
UMB Bank, n.a. $1 754 70 0,00% Actions
Bare Financial Services, Inc $1 654 66 0,00% Actions
Pinnacle Wealth Planning Services, Inc. $1 554 62 0,00% Actions
Quarry LP $1 453 58 0,00% Actions
ZIONS BANCORPORATION, NATIONAL ASSOCIATION /UT/ $1 328 53 0,00% Actions
Cornerstone Financial Management LLC $1 203 48 0,00% Actions
FIFTH THIRD BANCORP $1 203 48 0,00% Actions
HRT FINANCIAL LP $1 157 46 204 0,00% Actions
Bogart Wealth, LLC $1 053 42 0,00% Actions
Kilter Group LLC $1 028 41 0,00% Actions
RHUMBLINE ADVISERS $952 38 0,00% Actions
DekaBank Deutsche Girozentrale $834 32 840 0,00% Actions
Larson Financial Group LLC $827 33 0,00% Actions
BOK Financial Private Wealth, Inc. $827 33 0,00% Actions
Main Management ETF Advisors, LLC $773 30 854 0,00% Actions
WealthCollab, LLC $602 24 0,00% Actions
SHELL ASSET MANAGEMENT CO $600 20 258 0,00% Actions
Gulf International Bank (UK) Ltd $578 23 133 0,00% Actions
Godfrey Financial Associates, Inc. $476 19 0,00% Actions
Triumph Capital Management $376 15 0,00% Actions
LRI Investments, LLC $276 11 0,00% Actions
S&CO INC $250 10 000 0,00% Actions
ACADIAN ASSET MANAGEMENT LLC $190 7 600 0,00% Actions
Global Retirement Partners, LLC $175 7 0,00% Actions
GROUP ONE TRADING LLC $175 7 0,00% Actions
MV CAPITAL MANAGEMENT, INC. $126 5 0,00% Actions
Silver Grove Financial Group, Inc. $100 4 0,00% Actions
SBI Securities Co., Ltd. $75 3 0,00% Actions
Financial Gravity Companies, Inc. $50 2 0,00% Actions
Capital Advisors, Ltd. LLC $16 625 0,00% Actions
BESSEMER GROUP INC $2 95 0,00% Actions