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Aon plc

AON·NYSE·Ireland Ireland·Insider activity
$273.99
+1.94 (+0.71%)
Close · Oct 6, 2026 · Close Prices from Tiingo.com
AON
Insider purchases and sales on the price
Nasdaq 100S&P 500
Filings
Default90D1Y5YALL
AONS&P 500 (rebased)
Insider BuyInsider SellForm 144 · planned sale
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Daily closes, adjusted for splits and dividends · Close Prices from Tiingo.comHover a marker, every one is a filing · move across the line for the crosshair

In the last 180 days, AON insiders filed 6 purchases ($6.5M) and 7 sales ($1.7M) on the open market, by 2 insiders. Newest filing Sep 3, 2026 (1 month ago).

Net Insider Buying by Quarter

Shares bought (+) or sold (−) on the open market by AON insiders · Form 4 · last two years
-20.0K-10.0K010.0K20.0K2025 Q1: 02025 Q12025 Q2: 02025 Q22025 Q3: 02025 Q32025 Q4: -8,8002025 Q42026 Q1: -5,3402026 Q12026 Q2: 02026 Q22026 Q3: 15.6K2026 Q32026 Q4: 02026 Q4

On Record

$6.5MPurchases · 180 days
$1.7MSales · 180 days
274Open-market transactions on record
2Insiders filing · 180 days

Purchases (code P) and sales (code S) of AON common stock reported on Form 4, with Form 5 annual catch-ups. Grants, option exercises, gifts and tax withholding are not shown. Dollars are shares × the stated price; a price outside anything the stock traded at that day is withheld (n/c).

Insider Transactions

274 on record · newest trade first
AllPurchasesSalesOfficers & directors
InsiderTypeSharesPriceValueHeld afterTradedFiled
KNIGHT LESTER BDirector · Director Purchase +7,212 $327.52 $2.4M157.0Kindirect Sep 2, 2026Sep 3, 2026 Form 4 ↗
KNIGHT LESTER BDirector · Director Purchase +5,097 $326.53 $1.7M149.8Kindirect Sep 2, 2026Sep 3, 2026 Form 4 ↗
KNIGHT LESTER BDirector · Director Purchase +4,145 $328.34 $1.4M161.2Kindirect Sep 2, 2026Sep 3, 2026 Form 4 ↗
KNIGHT LESTER BDirector · Director Purchase +367 $330.51 $121K163.0Kindirect Sep 2, 2026Sep 3, 2026 Form 4 ↗
KNIGHT LESTER BDirector · Director Purchase +1,739 $325.63 $566K144.7Kindirect Sep 2, 2026Sep 3, 2026 Form 4 ↗
KNIGHT LESTER BDirector · Director Purchase +1,440 $329.69 $475K162.6Kindirect Sep 2, 2026Sep 3, 2026 Form 4 ↗
Zeidel DarrenGeneral Counsel Sale −725 $378.00 $274K12.0Kdirect Jul 28, 2026Jul 30, 2026 Form 4 ↗
Zeidel DarrenGeneral Counsel Sale −700 $376.00 $263K12.7Kdirect Jul 28, 2026Jul 30, 2026 Form 4 ↗
Zeidel DarrenGeneral Counsel Sale −475 $380.00 $181K11.5Kdirect Jul 28, 2026Jul 30, 2026 Form 4 ↗
Zeidel DarrenGeneral Counsel Sale −675 $374.00 $252K13.4Kdirect Jul 17, 2026Jul 21, 2026 Form 4 ↗
Zeidel DarrenGeneral Counsel Sale −650 $372.00 $242K14.1Kdirect Jul 17, 2026Jul 21, 2026 Form 4 ↗
Zeidel DarrenGeneral Counsel Sale −625 $370.00 $231K14.7Kdirect Jul 17, 2026Jul 21, 2026 Form 4 ↗
Zeidel DarrenGeneral Counsel Sale −600 $360.00 $216K15.4Kdirect Jul 7, 2026Jul 9, 2026 Form 4 ↗
Zeidel DarrenGeneral Counsel Sale −4,300 $329.72 $1.4M16.0Kdirect Feb 26, 2026Mar 2, 2026 Form 4 ↗
Zeidel DarrenGeneral Counsel Sale −5,040 $325.79 $1.6M20.3Kdirect Feb 17, 2026Feb 19, 2026 Form 4 ↗
KNIGHT LESTER BDirector Purchase +4,000 $319.24 $1.3M143.0Kindirect Feb 10, 2026Feb 12, 2026 Form 4 ↗
Zeidel DarrenGeneral Counsel Sale −1,230 $345.17 $425K20.3Kdirect Nov 5, 2025Nov 7, 2025 Form 4 ↗
Zeidel DarrenGeneral Counsel Sale −7,570 $344.42 $2.6M21.5Kdirect Nov 5, 2025Nov 7, 2025 Form 4 ↗
Simon Mindy F.Chief Operating Officer Sale −650 $394.34 $256K1,816direct Nov 27, 2024Dec 2, 2024 Form 4 ↗
Stevens LisaChief Administrative Officer Sale −1,275 $387.68 $494K8,077direct Nov 26, 2024Nov 29, 2024 Form 4 ↗
Spruell ByronDirector Purchase +725 $340.08 $247K5,303direct Aug 28, 2024Aug 29, 2024 Form 4 ↗
Stevens LisaChief Administrative Officer Sale −400 $328.95 $132K9,352direct Aug 12, 2024Aug 14, 2024 Form 4 ↗
Zeidel DarrenGeneral Counsel Sale −950 $329.15 $313K23.5Kdirect Aug 12, 2024Aug 14, 2024 Form 4 ↗
Zeidel DarrenGeneral Counsel Sale −6,597 $310.00 $2.0M24.4Kdirect Jul 26, 2024Jul 30, 2024 Form 4 ↗
KNIGHT LESTER BDirector Purchase +1,109 $277.50 $308K55.0Kindirect May 3, 2024May 7, 2024 Form 4 ↗
KNIGHT LESTER BDirector Purchase +2,426 $276.72 $671K53.9Kindirect May 3, 2024May 7, 2024 Form 4 ↗
KNIGHT LESTER BDirector Purchase +1,466 $275.76 $404K51.5Kindirect May 3, 2024May 7, 2024 Form 4 ↗
KNIGHT LESTER BDirector Purchase +1,109 $277.50 $308K139.0Kindirect May 3, 2024May 7, 2024 Form 4 ↗
KNIGHT LESTER BDirector Purchase +2,426 $276.72 $671K137.9Kindirect May 3, 2024May 7, 2024 Form 4 ↗
KNIGHT LESTER BDirector Purchase +1,466 $275.76 $404K135.5Kindirect May 3, 2024May 7, 2024 Form 4 ↗
Stevens LisaChief People Officer Sale −315 $316.31 $100K9,723direct Mar 6, 2024Mar 8, 2024 Form 4 ↗
Andersen EricPresident Sale −5,500 $313.74 $1.7M164.6Kdirect Mar 1, 2024Mar 5, 2024 Form 4 ↗
Stevens LisaChief People Officer Sale −13.0K $315.26 $4.1M10.1Kdirect Feb 23, 2024Feb 26, 2024 Form 4 ↗
Davies ChristaChief Financial Officer Sale −40.2K $313.29 $12.6M159.6Kdirect Feb 16, 2024Feb 20, 2024 Form 4 ↗
Neller MichaelPrincipal Accounting Officer Sale −750 $312.00 $234K3,869direct Feb 15, 2024Feb 20, 2024 Form 4 ↗
Davies ChristaChief Financial Officer Sale −1,033 $312.39 $323K159.6Kdirect Feb 12, 2024Feb 13, 2024 Form 4 ↗
Davies ChristaChief Financial Officer Sale −12.8K $311.66 $4.0M160.6Kdirect Feb 12, 2024Feb 13, 2024 Form 4 ↗
Davies ChristaChief Financial Officer Sale −6,749 $310.75 $2.1M173.4Kdirect Feb 12, 2024Feb 13, 2024 Form 4 ↗
KNIGHT LESTER BDirector Purchase +25.0K $301.97 $7.5M50.0Kindirect Feb 7, 2024Feb 9, 2024 Form 4 ↗
KNIGHT LESTER BDirector Purchase +25.0K $301.97 $7.5M134.0Kindirect Feb 7, 2024Feb 9, 2024 Form 4 ↗
Spruell ByronDirector Purchase +800 $324.58 $260K4,001direct Aug 23, 2023Aug 24, 2023 Form 4 ↗
Andersen EricPresident Sale −7,500 $335.55 $2.5M144.2Kdirect May 9, 2023May 11, 2023 Form 4 ↗
Davies ChristaChief Financial Officer Sale −1,523 $306.87 $467K179.6Kdirect Feb 21, 2023Feb 22, 2023 Form 4 ↗
Davies ChristaChief Financial Officer Sale −3,797 $306.11 $1.2M181.1Kdirect Feb 21, 2023Feb 22, 2023 Form 4 ↗
Davies ChristaChief Financial Officer Sale −8,753 $305.08 $2.7M184.9Kdirect Feb 21, 2023Feb 22, 2023 Form 4 ↗
Davies ChristaChief Financial Officer Sale −6,455 $304.15 $2.0M193.6Kdirect Feb 21, 2023Feb 22, 2023 Form 4 ↗
Davies ChristaChief Financial Officer Sale −300 $310.78 $93K199.6Kdirect Feb 17, 2023Feb 22, 2023 Form 4 ↗
Davies ChristaChief Financial Officer Sale −47.1K $310.19 $14.6M199.9Kdirect Feb 17, 2023Feb 22, 2023 Form 4 ↗
Davies ChristaChief Financial Officer Sale −3,845 $309.54 $1.2M247.0Kdirect Feb 17, 2023Feb 22, 2023 Form 4 ↗
Neller MichaelPrincipal Accounting Officer Sale −1,000 $311.59 $312K1,216direct Feb 16, 2023Feb 21, 2023 Form 4 ↗
Davies ChristaChief Financial Officer Sale −617 $318.36 $196K199.6Kdirect Feb 13, 2023Feb 14, 2023 Form 4 ↗
Spruell ByronDirector Purchase +400 $291.72 $117K2,743direct Aug 23, 2022Aug 25, 2022 Form 4 ↗
Neller MichaelPrincipal Accounting Officer Sale −900 $284.45 $256K2,636indirect Aug 4, 2022Aug 9, 2022 Form 4 ↗
Zeidel DarrenGeneral Counsel Sale −111 $290.00 $32K15.1Kdirect Jul 28, 2022Aug 1, 2022 Form 4 ↗
KNIGHT LESTER BDirector Purchase +10.0K $286.60 $2.9M25.0Kindirect May 5, 2022May 9, 2022 Form 4 ↗
KNIGHT LESTER BDirector Purchase +4,000 $286.53 $1.1M109.0Kindirect May 5, 2022May 9, 2022 Form 4 ↗
Zeidel DarrenGeneral Counsel Sale −82 $308.31 $25K15.1Kdirect Mar 16, 2022Mar 17, 2022 Form 4 ↗
Zeidel DarrenGeneral Counsel Sale −317 $290.00 $92K15.1Kdirect Feb 25, 2022Mar 1, 2022 Form 4 ↗
Andersen EricPresident Sale −201 $282.97 $57K123.7Kdirect Feb 23, 2022Feb 25, 2022 Form 4 ↗
Andersen EricPresident Sale −7,299 $282.56 $2.1M123.9Kdirect Feb 23, 2022Feb 25, 2022 Form 4 ↗
Neller MichaelPrincipal Accounting Officer Sale −1,250 $285.00 $356K1,928direct Feb 22, 2022Feb 24, 2022 Form 4 ↗
Davies ChristaChief Financial Officer Sale −1,626 $284.77 $463K199.6Kdirect Feb 18, 2022Feb 22, 2022 Form 4 ↗
Davies ChristaChief Financial Officer Sale −5,206 $283.87 $1.5M201.2Kdirect Feb 18, 2022Feb 22, 2022 Form 4 ↗
Davies ChristaChief Financial Officer Sale −9,137 $283.05 $2.6M206.4Kdirect Feb 18, 2022Feb 22, 2022 Form 4 ↗
Davies ChristaChief Financial Officer Sale −11.6K $281.93 $3.3M215.5Kdirect Feb 18, 2022Feb 22, 2022 Form 4 ↗
Davies ChristaChief Financial Officer Sale −4,584 $280.99 $1.3M227.2Kdirect Feb 18, 2022Feb 22, 2022 Form 4 ↗
Davies ChristaChief Financial Officer Sale −750 $279.93 $210K231.8Kdirect Feb 18, 2022Feb 22, 2022 Form 4 ↗
Davies ChristaChief Financial Officer Sale −666 $283.95 $189K199.6Kdirect Feb 15, 2022Feb 17, 2022 Form 4 ↗
Davies ChristaChief Financial Officer Sale −616 $283.72 $175K199.6Kdirect Feb 14, 2022Feb 15, 2022 Form 4 ↗
Zeidel DarrenGeneral Counsel Sale −197 $295.00 $58K12.4Kdirect Dec 23, 2021Dec 28, 2021 Form 4 ↗
Spruell ByronDirector Purchase +200 $296.32 $59K1,572direct Nov 23, 2021Nov 24, 2021 Form 4 ↗
Neller MichaelPrincipal Accounting Officer Sale −2,500 $298.14 $745K90direct Nov 9, 2021Nov 12, 2021 Form 4 ↗
LOSH J MICHAELDirector Sale −9,000 $279.62 $2.5M11.6Kindirect Aug 17, 2021Aug 19, 2021 Form 4 ↗
KNIGHT LESTER BDirector Purchase +1,315 $264.56 $348K15.0Kindirect Aug 4, 2021Aug 9, 2021 Form 4 ↗
KNIGHT LESTER BDirector Purchase +3,685 $263.79 $972K13.7Kindirect Aug 4, 2021Aug 9, 2021 Form 4 ↗
KNIGHT LESTER BDirector Purchase +2,100 $264.38 $555K105.0Kindirect Aug 4, 2021Aug 9, 2021 Form 4 ↗
KNIGHT LESTER BDirector Purchase +2,900 $263.59 $764K102.9Kindirect Aug 4, 2021Aug 9, 2021 Form 4 ↗
Davies ChristaChief Financial Officer Sale −11.4K $224.89 $2.6M199.6Kdirect Feb 16, 2021Feb 17, 2021 Form 4 ↗
Davies ChristaChief Financial Officer Sale −2,800 $230.54 $646K209.6Kdirect Feb 12, 2021Feb 17, 2021 Form 4 ↗
Davies ChristaChief Financial Officer Sale −5,598 $229.74 $1.3M212.4Kdirect Feb 12, 2021Feb 17, 2021 Form 4 ↗
Davies ChristaChief Financial Officer Sale −5,803 $228.80 $1.3M218.0Kdirect Feb 12, 2021Feb 17, 2021 Form 4 ↗
Davies ChristaChief Financial Officer Sale −18.6K $227.82 $4.2M223.8Kdirect Feb 12, 2021Feb 17, 2021 Form 4 ↗
Davies ChristaChief Financial Officer Sale −4,145 $226.86 $940K242.4Kdirect Feb 12, 2021Feb 17, 2021 Form 4 ↗
Andersen EricPresident Sale −5,000 $197.46 $987K96.5Kdirect Nov 10, 2020Nov 12, 2020 Form 4 ↗
BRUNO JOHN GChief Operating Officer Purchase +1,000 $186.46 $186K69.7Kdirect Nov 6, 2020Nov 10, 2020 Form 4 ↗
KNIGHT LESTER BDirector Purchase +300 $186.96 $56K10.0Kindirect Nov 5, 2020Nov 9, 2020 Form 4 ↗
KNIGHT LESTER BDirector Purchase +9,700 $186.54 $1.8M9,700indirect Nov 5, 2020Nov 9, 2020 Form 4 ↗
Andersen EricPresident Sale −1,500 $199.13 $299K102.8Kdirect May 28, 2020Jun 1, 2020 Form 4 ↗
WOO CAROLYN YDirector Sale −600 $197.80 $119K25.7Kdirect May 27, 2020May 29, 2020 Form 4 ↗
Neller MichaelPrincipal Accounting Officer Sale −750 $190.50 $143K3,459direct May 14, 2020May 18, 2020 Form 4 ↗
KNIGHT LESTER BDirector Purchase +55.0K $195.00 $10.7M55.0Kindirect May 13, 2020May 15, 2020 Form 4 ↗
KNIGHT LESTER BDirector Purchase +15.0K $195.00 $2.9M100.0Kindirect May 13, 2020May 15, 2020 Form 4 ↗
Neller MichaelPrincipal Accounting Officer Sale −1,250 $160.68 $201K4,209direct Mar 16, 2020Mar 17, 2020 Form 4 ↗
O'Connor Michael JCo-President Sale −16.1K $234.91 $3.8M123.9Kdirect Feb 18, 2020Feb 20, 2020 Form 4 ↗
O'Connor Michael JCo-President Sale −7,980 $234.18 $1.9M139.9Kdirect Feb 18, 2020Feb 20, 2020 Form 4 ↗
O'Connor Michael JCo-President Sale −1,217 $233.06 $284K147.9Kdirect Feb 18, 2020Feb 20, 2020 Form 4 ↗
Davies ChristaChief Financial Officer Sale −1,000 $234.24 $234K219.6Kdirect Feb 18, 2020Feb 19, 2020 Form 4 ↗
Davies ChristaChief Financial Officer Sale −1,354 $233.42 $316K220.6Kdirect Feb 18, 2020Feb 19, 2020 Form 4 ↗
Goland Anthony RChief Innovation Officer Sale −15.0K $235.00 $3.5M16.8Kdirect Feb 18, 2020Feb 19, 2020 Form 4 ↗
Davies ChristaChief Financial Officer Sale −315 $235.78 $74K219.6Kdirect Feb 14, 2020Feb 18, 2020 Form 4 ↗
Davies ChristaChief Financial Officer Sale −28.0K $235.17 $6.6M219.9Kdirect Feb 14, 2020Feb 18, 2020 Form 4 ↗
Davies ChristaChief Financial Officer Sale −4,423 $234.33 $1.0M247.9Kdirect Feb 14, 2020Feb 18, 2020 Form 4 ↗
LOSH J MICHAELDirector Sale −5,000 $193.60 $968K15.2Kindirect Nov 6, 2019Nov 7, 2019 Form 4 ↗
Goland Anthony RChief Innovation Officer Sale −1,703 $194.79 $332K15.6Kdirect Nov 5, 2019Nov 7, 2019 Form 4 ↗
Neller MichaelPrincipal Accounting Officer Sale −750 $193.29 $145K2,192direct Sep 3, 2019Sep 5, 2019 Form 4 ↗
BRUNO JOHN GChief Operating Officer Sale −1,100 $194.02 $213K45.2Kdirect Aug 30, 2019Sep 3, 2019 Form 4 ↗
BRUNO JOHN GChief Operating Officer Sale −6,500 $192.01 $1.2M46.3Kdirect Aug 29, 2019Sep 3, 2019 Form 4 ↗
LIEB PETER MGeneral Counsel Sale −300 $181.93 $55K1direct May 31, 2019Jun 4, 2019 Form 4 ↗
LIEB PETER MGeneral Counsel Sale −4,107 $181.17 $744K301direct May 31, 2019Jun 4, 2019 Form 4 ↗
LIEB PETER MGeneral Counsel Sale −7,238 $180.36 $1.3M4,408direct May 31, 2019Jun 4, 2019 Form 4 ↗
Andersen EricCo-President Sale −7,500 $178.50 $1.3M80.9Kdirect May 9, 2019May 9, 2019 Form 4 ↗
LIEB PETER MGeneral Counsel Sale −332 $180.15 $60K11.6Kdirect Apr 30, 2019May 1, 2019 Form 4 ↗
LIEB PETER MGeneral Counsel Sale −1,185 $179.26 $212K12.0Kdirect Apr 30, 2019May 1, 2019 Form 4 ↗
LIEB PETER MGeneral Counsel Sale −3,283 $178.07 $585K13.2Kdirect Apr 30, 2019May 1, 2019 Form 4 ↗
LIEB PETER MGeneral Counsel Sale −400 $176.94 $71K16.4Kdirect Apr 30, 2019May 1, 2019 Form 4 ↗
Davies ChristaEVP and CFO Sale −23.2K n/c —212.1Kdirect Mar 18, 2019Mar 20, 2015 Form 4 ↗
O'Connor Michael JCo-President Sale −10.7K $172.99 $1.9M123.8Kdirect Feb 20, 2019Feb 26, 2019 Form 4 ↗
O'Connor Michael JCo-President Sale −12.1K $172.51 $2.1M134.5Kdirect Feb 20, 2019Feb 26, 2019 Form 4 ↗
LIEB PETER MGeneral Counsel Sale −1,139 $173.00 $197K16.8Kdirect Feb 19, 2019Feb 21, 2019 Form 4 ↗
LIEB PETER MGeneral Counsel Sale −13.9K $172.75 $2.4M18.0Kdirect Feb 19, 2019Feb 21, 2019 Form 4 ↗
Neller MichaelPrincipal Accounting Officer Sale −1,250 $171.66 $215K2,626direct Feb 19, 2019Feb 19, 2019 Form 4 ↗
Davies ChristaChief Financial Officer Sale Amended −11.4K $171.67 $2.0M219.6Kdirect Feb 15, 2019Feb 21, 2019 Form 4 ↗
Davies ChristaChief Financial Officer Sale −11.4K $171.67 $2.0M210.6Kdirect Feb 15, 2019Feb 20, 2019 Form 4 ↗
Davies ChristaChief Financial Officer Sale −22.7K $170.93 $3.9M222.0Kdirect Feb 15, 2019Feb 20, 2019 Form 4 ↗
Davies ChristaChief Financial Officer Sale Amended −1,034 $170.40 $176K250.8Kdirect Feb 14, 2019Feb 21, 2019 Form 4 ↗
Davies ChristaChief Financial Officer Sale −10.0K $170.40 $1.7M241.8Kdirect Feb 14, 2019Feb 20, 2019 Form 4 ↗
Davies ChristaChief Financial Officer Sale −14.0K $170.60 $2.4M251.9Kdirect Feb 14, 2019Feb 20, 2019 Form 4 ↗
Grace CarolineCEO, Global Retirement & Inves Sale −4,000 $160.00 $640K41.8Kdirect Nov 7, 2018Nov 9, 2018 Form 4 ↗
Grace CarolineCEO, Global Retirement & Inves Sale −4,000 $155.00 $620K45.8Kdirect Sep 19, 2018Sep 21, 2018 Form 4 ↗
Grace CarolineCEO, Global Retirement & Inves Sale −4,000 $150.00 $600K49.8Kdirect Sep 6, 2018Sep 10, 2018 Form 4 ↗
Neller MichaelPrincipal Accounting Officer Sale −750 $143.58 $108K787direct Aug 20, 2018Aug 22, 2018 Form 4 ↗
CAMPBELL JEFFREY CDirector Purchase +5,550 $143.84 $798K7,084direct Aug 6, 2018Aug 8, 2018 Form 4 ↗
Andersen EricCo-President Sale −5,000 $142.39 $712K67.3Kdirect May 24, 2018Feb 19, 2019 Form 4 ↗
Neller MichaelPrincipal Accounting Officer Sale −1,000 $140.93 $141K1,217direct May 16, 2018May 18, 2018 Form 4 ↗
LIEB PETER MGeneral Counsel Sale −14.8K $145.00 $2.1M16.0Kdirect Mar 9, 2018Mar 13, 2018 Form 4 ↗
O'Connor Michael JCEO, Aon Risk Solutions Sale −9,855 $145.00 $1.4M123.7Kdirect Mar 9, 2018Mar 13, 2018 Form 4 ↗
Neller MichaelPrincipal Accounting Officer Sale −1,500 $140.12 $210K1,876direct Mar 1, 2018Mar 5, 2018 Form 4 ↗
Goland Anthony RChief Human Resources Officer Sale −2,124 $141.16 $300K261direct Feb 21, 2018Feb 22, 2018 Form 4 ↗
LIEB PETER MGeneral Counsel Sale −490 $142.00 $70K30.9Kdirect Feb 21, 2018Feb 22, 2018 Form 4 ↗
O'Connor Michael JCEO, Aon Risk Solutions Sale −1,411 $140.23 $198K133.5Kdirect Feb 20, 2018Feb 22, 2018 Form 4 ↗
Meissner Laurel G.Global Controller Sale −7,940 $140.23 $1.1M12.3Kdirect Feb 20, 2018Feb 22, 2018 Form 4 ↗
Davies ChristaChief Financial Officer Sale −1,640 $141.44 $232K231.7Kdirect Feb 20, 2018Feb 22, 2018 Form 4 ↗
Davies ChristaChief Financial Officer Sale −1,597 $140.52 $224K233.3Kdirect Feb 20, 2018Feb 22, 2018 Form 4 ↗
LIEB PETER MGeneral Counsel Sale −721 $141.32 $102K31.4Kdirect Feb 20, 2018Feb 22, 2018 Form 4 ↗
LIEB PETER MGeneral Counsel Sale −400 $140.16 $56K32.1Kdirect Feb 20, 2018Feb 22, 2018 Form 4 ↗
Davies ChristaChief Financial Officer Sale −84.5K $140.96 $11.9M231.7Kdirect Feb 16, 2018Feb 20, 2018 Form 4 ↗
Davies ChristaChief Financial Officer Sale −12.1K $140.62 $1.7M316.2Kdirect Feb 16, 2018Feb 20, 2018 Form 4 ↗
KNIGHT LESTER BDirector Purchase +10.0K $136.68 $1.4M85.0Kindirect Feb 6, 2018Feb 8, 2018 Form 4 ↗
KNIGHT LESTER BDirector Purchase +50.0K $138.77 $6.9M191.0Kindirect Feb 6, 2018Feb 8, 2018 Form 4 ↗
Zern JohnCEO, Aon Global Health Sale −14.7K $147.00 $2.2M12.9Kdirect Feb 2, 2018Feb 6, 2018 Form 4 ↗
O'Connor Michael JChief Executive Officer, ARS Sale −12.8K $145.00 $1.9M113.8Kdirect Feb 2, 2018Feb 6, 2018 Form 4 ↗
LIEB PETER MEVP & General Counsel Sale −4,200 $141.39 $594K16.2Kdirect Jan 31, 2018Feb 2, 2018 Form 4 ↗
Zern JohnCEO, Global Health & Benefits Sale −17.7K $139.79 $2.5M27.7Kdirect Nov 30, 2017Dec 4, 2017 Form 4 ↗
Meissner Laurel G.SVP & Global Controller Sale −4,000 $141.20 $565K12.3Kdirect Nov 30, 2017Dec 4, 2017 Form 4 ↗
Andersen EricCEO, Aon Benfield Sale −10.0K $143.52 $1.4M51.7Kdirect Nov 14, 2017Nov 16, 2017 Form 4 ↗
BRUNO JOHN GExecutive Vice President, CIO Sale −10.0K $143.24 $1.4M10.5Kdirect Nov 9, 2017Nov 13, 2017 Form 4 ↗
O'Connor Michael JChief Executive Officer, ARS Sale −10.0K $145.00 $1.4M113.8Kdirect Sep 19, 2017Sep 21, 2017 Form 4 ↗
O'Connor Michael JChief Executive Officer, ARS Sale −10.0K $140.28 $1.4M113.8Kdirect Sep 6, 2017Sep 8, 2017 Form 4 ↗
LIEB PETER MEVP & General Counsel Sale −2,000 $130.40 $261K20.2Kdirect May 25, 2017May 30, 2017 Form 4 ↗
Meissner Laurel G.SVP & Global Controller Sale −4,000 $126.19 $505K16.3Kdirect May 18, 2017May 22, 2017 Form 4 ↗
LIEB PETER MEVP & General Counsel Sale −16.7K $117.29 $2.0M22.2Kdirect Mar 30, 2017Apr 3, 2017 Form 4 ↗
LIEB PETER MEVP & General Counsel Sale −18.0K $116.11 $2.1M38.9Kdirect Feb 28, 2017Mar 2, 2017 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −17.4K $116.10 $2.0M270.3Kdirect Feb 22, 2017Feb 23, 2017 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −242.6K $115.31 $28.0M287.7Kdirect Feb 22, 2017Feb 23, 2017 Form 4 ↗
O'Connor Michael JChief Executive Officer, ARS Sale −2,000 $117.38 $235K113.8Kdirect Feb 21, 2017Feb 23, 2017 Form 4 ↗
O'Connor Michael JChief Executive Officer, ARS Sale −11.6K $116.58 $1.4M115.8Kdirect Feb 21, 2017Feb 23, 2017 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −42.5K $116.48 $4.9M530.3Kdirect Feb 21, 2017Feb 23, 2017 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −217.5K $115.67 $25.2M572.8Kdirect Feb 21, 2017Feb 23, 2017 Form 4 ↗
Davies ChristaEVP and CFO Sale −200 $117.67 $24K231.7Kdirect Feb 21, 2017Feb 23, 2017 Form 4 ↗
Davies ChristaEVP and CFO Sale −17.9K $116.46 $2.1M231.9Kdirect Feb 21, 2017Feb 23, 2017 Form 4 ↗
Davies ChristaEVP and CFO Sale −75.4K $115.71 $8.7M249.8Kdirect Feb 21, 2017Feb 23, 2017 Form 4 ↗
Davies ChristaEVP and CFO Sale −48.2K $117.42 $5.7M229.5Kdirect Feb 17, 2017Feb 21, 2017 Form 4 ↗
McGill Stephen PChairman/CEO - ARS Sale −46.7K $108.41 $5.1M252.1Kdirect Aug 2, 2016Aug 3, 2016 Form 4 ↗
LIEB PETER MEVP & General Counsel Sale −25.0K $101.24 $2.5M26.1Kdirect Mar 21, 2016Mar 23, 2016 Form 4 ↗
LIEB PETER MEVP & General Counsel Sale −29.4K $100.19 $2.9M26.1Kdirect Mar 16, 2016Mar 18, 2016 Form 4 ↗
Meissner Laurel G.SVP & Global Controller Sale −10.0K $93.08 $931K10.2Kdirect Feb 24, 2016Feb 26, 2016 Form 4 ↗
Davies ChristaEVP and CFO Sale −54.5K $93.35 $5.1M228.2Kdirect Feb 19, 2016Feb 22, 2016 Form 4 ↗
LIEB PETER MEVP & General Counsel Sale −1,170 $95.00 $111K27.9Kdirect Feb 17, 2016Feb 17, 2016 Form 4 ↗
LIEB PETER MEVP & General Counsel Sale −7,356 $94.36 $694K27.5Kdirect Feb 10, 2016Feb 11, 2016 Form 4 ↗
McGill Stephen PChairman/CEO - ARS Sale −24.2K $92.89 $2.2M214.4Kdirect Feb 9, 2016Feb 11, 2016 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −45.8K $95.01 $4.4M874.8Kdirect Dec 1, 2015Dec 2, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −53.8K $95.02 $5.1M920.6Kdirect Nov 30, 2015Dec 2, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −99.6K $95.04 $9.5M974.5Kdirect Nov 24, 2015Nov 24, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −25.2K $95.18 $2.4M1.1Mdirect Nov 23, 2015Nov 24, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −106.0K $95.00 $10.1M1.1Mdirect Nov 20, 2015Nov 24, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −101.4K $95.00 $9.6M1.2Mdirect Nov 18, 2015Nov 20, 2015 Form 4 ↗
McGill Stephen PChairman/CEO - ARS Sale −6,453 $94.12 $607K238.6Kdirect Nov 17, 2015Nov 19, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −57.6K $95.00 $5.5M1.3Mdirect Nov 5, 2015Nov 5, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −11.9K $95.02 $1.1M1.4Mdirect Nov 4, 2015Nov 5, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −28.7K $95.03 $2.7M1.4Mdirect Nov 3, 2015Nov 5, 2015 Form 4 ↗
KNIGHT LESTER BDirector Purchase +25.0K $100.76 $2.5M75.0Kindirect Aug 4, 2015Aug 5, 2015 Form 4 ↗
KNIGHT LESTER BDirector Purchase +50.0K $100.80 $5.0M140.0Kindirect Aug 4, 2015Aug 5, 2015 Form 4 ↗
McGill Stephen PChairman/CEO - ARS Sale −9,955 $100.03 $996K229.3Kdirect May 11, 2015May 13, 2015 Form 4 ↗
McGill Stephen PChairman/CEO - ARS Sale −10.5K $96.40 $1.0M239.2Kdirect Mar 16, 2015Mar 18, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −9,079 $97.41 $884K1.4Mdirect Mar 13, 2015Mar 13, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −20.2K $96.81 $2.0M1.4Mdirect Mar 13, 2015Mar 13, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.2K $96.78 $2.8M1.4Mdirect Mar 12, 2015Mar 13, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.4K $96.07 $2.8M1.4Mdirect Mar 11, 2015Mar 11, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.2K $96.81 $2.8M1.3Mdirect Mar 10, 2015Mar 11, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.3K $98.39 $2.9M1.3Mdirect Mar 9, 2015Mar 11, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −300 $100.77 $30K1.3Mdirect Mar 6, 2015Mar 6, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −6,500 $100.37 $652K1.3Mdirect Mar 6, 2015Mar 6, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −22.3K $99.09 $2.2M1.3Mdirect Mar 6, 2015Mar 6, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.1K $100.00 $2.9M1.3Mdirect Mar 5, 2015Mar 6, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.1K $99.28 $2.9M1.3Mdirect Mar 4, 2015Mar 6, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.1K $99.55 $2.9M1.2Mdirect Mar 3, 2015Mar 3, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.1K $99.90 $2.9M1.2Mdirect Mar 2, 2015Mar 3, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.1K $100.34 $2.9M1.2Mdirect Feb 27, 2015Mar 3, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.1K $99.61 $2.9M1.2Mdirect Feb 26, 2015Feb 26, 2015 Form 4 ↗
Meissner Laurel G.SVP & Global Controller Sale −10.0K $100.47 $1.0M8,483direct Feb 25, 2015Feb 26, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.0K $100.59 $2.9M1.2Mdirect Feb 25, 2015Feb 26, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.0K $100.75 $2.9M1.1Mdirect Feb 24, 2015Feb 26, 2015 Form 4 ↗
LIEB PETER MEVP & General Counsel Sale −5,800 $100.54 $583K34.7Kdirect Feb 23, 2015Feb 25, 2015 Form 4 ↗
LIEB PETER MEVP & General Counsel Sale −28.3K $99.99 $2.8M40.5Kdirect Feb 23, 2015Feb 25, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.1K $99.92 $2.9M1.1Mdirect Feb 23, 2015Feb 23, 2015 Form 4 ↗
Davies ChristaEVP and CFO Sale −19.8K $100.34 $2.0M212.1Kdirect Feb 20, 2015Feb 23, 2015 Form 4 ↗
Davies ChristaEVP and CFO Sale −188.6K $99.77 $18.8M231.9Kdirect Feb 20, 2015Feb 23, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.2K $99.54 $2.9M1.1Mdirect Feb 20, 2015Feb 23, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.1K $100.26 $2.9M880.4Kdirect Feb 19, 2015Feb 23, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.0K $100.59 $2.9M859.5Kdirect Feb 18, 2015Feb 18, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.0K $100.62 $2.9M835.9Kdirect Feb 17, 2015Feb 18, 2015 Form 4 ↗
LIEB PETER MEVP & General Counsel Sale −2,894 $100.30 $290K35.0Kdirect Feb 17, 2015Feb 17, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −29.0K $101.11 $2.9M809.3Kdirect Feb 13, 2015Feb 18, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −5,051 $100.77 $509K791.0Kdirect Feb 12, 2015Feb 12, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −33.6K $98.75 $3.3M788.5Kdirect Feb 11, 2015Feb 12, 2015 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −32.3K $96.99 $3.1M772.1Kdirect Feb 10, 2015Feb 12, 2015 Form 4 ↗
KNIGHT LESTER BDirector Purchase +60.0K $90.44 $5.4M90.0Kindirect Nov 19, 2014Nov 20, 2014 Form 4 ↗
McGill Stephen PChairman/CEO - ARS Sale −4,800 $87.49 $420K297.7Kdirect Oct 1, 2014Oct 3, 2014 Form 4 ↗
McGill Stephen PChairman/CEO - ARS Sale −37.0K $86.78 $3.2M302.5Kdirect Oct 1, 2014Oct 3, 2014 Form 4 ↗
McGill Stephen PChairman/CEO - ARS Sale −4,454 $88.00 $392K297.7Kdirect Sep 18, 2014Sep 22, 2014 Form 4 ↗
LIEB PETER MEVP & General Counsel Sale −500 $88.31 $44K34.9Kdirect Sep 2, 2014Sep 4, 2014 Form 4 ↗
LIEB PETER MEVP & General Counsel Sale −14.4K $87.70 $1.3M35.4Kdirect Sep 2, 2014Sep 4, 2014 Form 4 ↗
Besio Gregory JEVP/Chief HR Officer Sale −10.0K $85.35 $854K57.8Kdirect Aug 15, 2014Aug 19, 2014 Form 4 ↗
LIEB PETER MEVP & General Counsel Sale −9,367 $89.79 $841K50.1Kdirect Jul 16, 2014Jul 17, 2014 Form 4 ↗
Besio Gregory JEVP/Chief HR Officer Sale −10.0K $90.06 $901K67.8Kdirect Jul 15, 2014Jul 17, 2014 Form 4 ↗
Besio Gregory JEVP/Chief HR Officer Sale −10.0K $89.74 $897K77.8Kdirect Jun 16, 2014Jun 18, 2014 Form 4 ↗
Besio Gregory JEVP/Chief HR Officer Sale −5,000 $85.76 $429K87.8Kdirect May 15, 2014May 19, 2014 Form 4 ↗
Besio Gregory JEVP/Chief HR Officer Sale −5,000 $85.23 $426K92.8Kdirect May 15, 2014May 19, 2014 Form 4 ↗
LIEB PETER MEVP & General Counsel Sale −11.3K $85.98 $972K53.0Kdirect May 8, 2014May 12, 2014 Form 4 ↗
Besio Gregory JEVP/Chief HR Officer Sale −10.0K $80.47 $805K97.8Kdirect Apr 15, 2014Apr 17, 2014 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −3,807 $85.94 $327K723.5Kdirect Feb 26, 2014Feb 28, 2014 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −61.8K $85.44 $5.3M727.3Kdirect Feb 26, 2014Feb 28, 2014 Form 4 ↗
Meissner Laurel G.SVP & Global Controller Sale −10.0K $86.27 $863K4,575direct Feb 21, 2014Feb 24, 2014 Form 4 ↗
KNIGHT LESTER BDirector Purchase Amended +30.0K $77.31 $2.3M31.0Kindirect Feb 4, 2014Feb 22, 2016 Form 4 ↗
KNIGHT LESTER BDirector Purchase +30.0K $77.31 $2.3M30.0Kindirect Feb 4, 2014Feb 6, 2014 Form 4 ↗
McGill Stephen PChairman/CEO - ARS Sale −64.0K $79.43 $5.1M166.6Kdirect Oct 30, 2013Nov 1, 2013 Form 4 ↗
Meissner Laurel G.SVP & Global Controller Sale −5,600 $68.99 $386K4,637direct Aug 9, 2013Aug 12, 2013 Form 4 ↗
WOO CAROLYN YDirector Sale −12.0K $66.78 $801K18.2Kdirect Jul 30, 2013Jul 31, 2013 Form 4 ↗
Davies ChristaEVP and CFO Sale −23.4K $66.08 $1.5M164.1Kdirect May 21, 2013May 23, 2013 Form 4 ↗
O'Connor Michael JARS - COO Sale −23.0K $66.16 $1.5M73.4Kdirect May 15, 2013May 16, 2013 Form 4 ↗
Besio Gregory JEVP/Chief HR Officer Sale −9,757 $63.91 $624K90.8Kdirect May 8, 2013May 10, 2013 Form 4 ↗
WOO CAROLYN YDirector Sale −2,273 $59.99 $136K5,642direct Apr 30, 2013May 1, 2013 Form 4 ↗
O'Connor Michael JARS - COO Sale −8,100 $61.65 $499K65.6Kdirect Feb 28, 2013Mar 4, 2013 Form 4 ↗
Meissner Laurel G.SVP & Global Controller Sale −12.7K $60.75 $774K10.2Kdirect Feb 27, 2013Mar 1, 2013 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −95.3K $60.47 $5.8M613.7Kdirect Feb 22, 2013Feb 26, 2013 Form 4 ↗
McGill Stephen PChairman/CEO - ARS Sale −24.6K $57.81 $1.4M176.8Kdirect Feb 19, 2013Feb 21, 2013 Form 4 ↗
KNIGHT LESTER BDirector Purchase +25.0K $57.10 $1.4M50.0Kindirect Feb 15, 2013Feb 19, 2013 Form 4 ↗
KNIGHT LESTER BDirector Purchase +44 $56.67 $2K30.0Kindirect Feb 11, 2013Feb 28, 2014 Form 4 ↗
Conti FulvioDirector Sale −411 $57.20 $24K21.0Kdirect Jan 17, 2013Feb 18, 2014 Form 4 ↗
O'Connor Michael JARS - COO Sale −9,000 $55.89 $503K50.8Kdirect Nov 15, 2012Nov 16, 2012 Form 4 ↗
McGill Stephen PChairman/CEO - ARS Sale −71.0K $56.18 $4.0M130.8Kdirect Nov 13, 2012Nov 15, 2012 Form 4 ↗
Clement PhilipGlobal Chief Marketing Officer Sale −24.6K $51.37 $1.3M27.0Kdirect Aug 9, 2012Aug 10, 2012 Form 4 ↗
Clement PhilipGlobal Chief Marketing Officer Sale −20.0K $50.53 $1.0M31.6Kdirect Aug 8, 2012Aug 10, 2012 Form 4 ↗
Besio Gregory JEVP/Chief HR Officer Sale −10.3K $49.57 $509K77.4Kdirect Aug 1, 2012Aug 3, 2012 Form 4 ↗
WOO CAROLYN YDirector Sale −1,300 $46.99 $61K2,273direct May 30, 2012May 31, 2012 Form 4 ↗
MORRISON ROBERT SDirector Purchase +2,000 $47.08 $94K9,281direct May 29, 2012May 30, 2012 Form 4 ↗
MYERS RICHARD BDirector Purchase +1,030 $47.48 $49K3,644direct May 25, 2012May 29, 2012 Form 4 ↗
Case Gregory CPresident & CEO · Director Sale −82.4K $48.95 $4.0M559.2Kdirect Mar 15, 2012Mar 19, 2012 Form 4 ↗
Meissner Laurel G.SVP & Global Controller Sale −1,900 $47.15 $90K11.4Kdirect Feb 28, 2012Feb 29, 2012 Form 4 ↗
Besio Gregory JEVP/Chief HR Officer Sale −10.0K $47.25 $473K73.5Kdirect Feb 28, 2012Feb 29, 2012 Form 4 ↗
Clement PhilipCMO Sale −12.7K $48.87 $621K32.6Kdirect Feb 13, 2012Feb 15, 2012 Form 4 ↗
McGill Stephen PChairman/CEO - ARS Sale −45.5K $48.65 $2.2M141.2Kdirect Feb 10, 2012Feb 14, 2012 Form 4 ↗
WOO CAROLYN YDirector Sale −1,688 $48.67 $82K3,575direct Feb 9, 2012Feb 10, 2012 Form 4 ↗
WOO CAROLYN YDirector Sale −3,000 $48.13 $144K5,263direct Feb 7, 2012Feb 8, 2012 Form 4 ↗

Source: SEC EDGAR Form 4 and Form 5 filings, SEC's quarterly bulk dataset through Jun 30, 2026, and KeyVex's half-hourly read of new filings since. Every row links its filing. Amendments are marked. Nothing here is a recommendation. All insider activity, market-wide →