Aon plc insider activity
What the executives and directors of Aon plc actually did with their own shares, decoded from their SEC Form 4 filings. Each figure says the stretch of time it covers.
$76K
net open-market flow, 12 m
7 open-market buys, 12 m
42.6%
of sale value on 10b5-1 plans, 12 m
19 days since an insider bought, whole record
The tape: three years of insider trades
Open-market buy
Discretionary sale
Planned sale (10b5-1)
Reported-price path
Routine
Every marker sits at the price reported on the Form 4. The line is the monthly median of all prices insiders reported, so the chart needs no market feed; the grey strip is the routine flow (grants, vestings, tax withholding and gifts) that a headline gets wrong by counting it as selling.
The 98 routine events on the chart, as a list
| Date | Insider | Shares |
|---|---|---|
| Jul 1, 2026 | Reese Edmund | 6,173 |
| Jun 25, 2026 | KNIGHT LESTER B | 1,488 |
| Jun 25, 2026 | SMITH SARAH G | 962 |
| Jun 25, 2026 | NOTEBAERT RICHARD C | 962 |
| Jun 25, 2026 | SANTONA GLORIA | 962 |
| Jun 25, 2026 | CAMPBELL JEFFREY C | 962 |
| Jun 25, 2026 | FRANCIS CHERYL A | 962 |
| Jun 25, 2026 | Alvarez Jose Antonio | 1,148 |
| Jun 25, 2026 | Karaboutis Adriana | 962 |
| Jun 25, 2026 | STAVRIDIS JAMES G. | 962 |
| Jun 25, 2026 | Cai Jin-Yong | 1,173 |
| Jun 25, 2026 | Jenkins Jo Ann | 962 |
| Jun 25, 2026 | Spruell Byron | 962 |
| May 12, 2026 | NOTEBAERT RICHARD C | 1,438 |
| Mar 13, 2026 | Corona Anne | 530 |
| Mar 13, 2026 | Goltermann Lori | 743 |
| Mar 13, 2026 | Marcell Andy | 2,424 |
| Feb 19, 2026 | Case Gregory C | 40K |
| Feb 18, 2026 | Stevens Lisa | 32 |
| Feb 13, 2026 | Zeidel Darren | 11K |
| Feb 13, 2026 | Stevens Lisa | 26K |
| Feb 13, 2026 | Simon Mindy F. | 8,291 |
| Feb 13, 2026 | Reese Edmund | 849 |
| Feb 12, 2026 | Case Gregory C | 111K |
| Feb 12, 2026 | Corona Anne | 4,576 |
| Feb 12, 2026 | Goltermann Lori | 9,650 |
| Feb 12, 2026 | Marcell Andy | 19K |
| Dec 5, 2025 | KNIGHT LESTER B | 7,878 |
| Nov 21, 2025 | Corona Anne | 197 |
| Nov 21, 2025 | Goltermann Lori | 224 |
| Nov 21, 2025 | Marcell Andy | 128 |
| Nov 14, 2025 | Simon Mindy F. | 2,576 |
| Nov 12, 2025 | SANTONA GLORIA | 35K |
| Sep 26, 2025 | Jenkins Jo Ann | 810 |
| Jul 1, 2025 | Reese Edmund | 6,173 |
| Jun 26, 2025 | KNIGHT LESTER B | 1,273 |
| Jun 26, 2025 | SMITH SARAH G | 790 |
| Jun 26, 2025 | NOTEBAERT RICHARD C | 790 |
| Jun 26, 2025 | SANTONA GLORIA | 790 |
| Jun 26, 2025 | CAMPBELL JEFFREY C | 790 |
| Jun 26, 2025 | FRANCIS CHERYL A | 790 |
| Jun 26, 2025 | Alvarez Jose Antonio | 943 |
| Jun 26, 2025 | Karaboutis Adriana | 790 |
| Jun 26, 2025 | STAVRIDIS JAMES G. | 790 |
| Jun 26, 2025 | Cai Jin-Yong | 956 |
| Jun 26, 2025 | Spruell Byron | 790 |
| May 29, 2025 | NOTEBAERT RICHARD C | 1,795 |
| Mar 14, 2025 | Neller Michael | 81 |
| Feb 21, 2025 | Stevens Lisa | 26 |
| Feb 18, 2025 | NOTEBAERT RICHARD C | 1,290 |
| Feb 18, 2025 | Case Gregory C | 1,954 |
| Feb 14, 2025 | Case Gregory C | 171K |
| Feb 14, 2025 | Andersen Eric | 47K |
| Feb 14, 2025 | Neller Michael | 3,191 |
| Feb 14, 2025 | Zeidel Darren | 13K |
| Feb 14, 2025 | Stevens Lisa | 26K |
| Nov 15, 2024 | Simon Mindy F. | 2,844 |
| Sep 17, 2024 | Neller Michael | 271 |
| Sep 17, 2024 | Slyfield Jillian | 126 |
| Sep 13, 2024 | STAVRIDIS JAMES G. | 815 |
Where the shares went, last 12 months
Every Form 4 movement decomposed: what flowed in (grants, vested equity, purchases) and what flowed out (tax withholding, plan sales, discretionary sales, gifts). Counted in shares, because grants carry no price.
The chart, in numbers
| Flow | Shares |
|---|---|
| Granted | 139K |
| Vested / exercised | 15K |
| Bought on market | 24K |
| Withheld for tax | 67K |
| Planned sales (10b5-1) | 9,490 |
| Discretionary sales | 13K |
| Gifts | 49K |
| Kept | 39K |
Skin in the game
Directly held shares as reported after each trade, indexed to 100 at the start of the window, up to five years back. Direct holdings only: trust and family-entity positions are per-entity in the filings and do not sum honestly, so this chart refuses to guess. The steps are the trades.
The chart, in numbers
| Insider | Start of the window | Latest reported | Indexed, start = 100 |
|---|---|---|---|
| Case Gregory C | 611K | 934K | 152.7 |
| Andersen Eric | 113K | 177K | 156.5 |
| KNIGHT LESTER B | 3,386 | 5,227 | 154.4 |
| SANTONA GLORIA | 38K | 22K | 59 |
| FRANCIS CHERYL A | 27K | 29K | 107.8 |
Who holds what
the 14 largest holdings of 26| Insider | Role | Shares held | Buys 12 m | Sales 12 m | 12 m | Last trade |
|---|---|---|---|---|---|---|
| Case Gregory C President & CEO Last trade Feb 22, 2017 | CEO | 971K | – | – | Feb 22, 2017 | |
| Andersen Eric President Last trade Mar 1, 2024 | Officer | 176K | – | – | Mar 1, 2024 | |
| Davies Christa Chief Financial Officer Last trade Feb 16, 2024 | CFO | 160K | – | – | Feb 16, 2024 | |
| KNIGHT LESTER B Last trade Sep 2, 2026 | Director | 150K | $7.8M | – | net buying over the year: 2 months buying, 0 months selling | Sep 2, 2026 |
| Weitz Andy Chief Marketing Officer | Officer | 41K | – | – | – | |
| SANTONA GLORIA | Director | 40K | – | – | – | |
| Conti Fulvio Last trade Jan 17, 2013 | Director | 31K | – | – | Jan 17, 2013 | |
| FRANCIS CHERYL A | Director | 29K | – | – | – | |
| NOTEBAERT RICHARD C | Director | 29K | – | – | – | |
| Stevens Lisa Chief Administrative Officer Last trade Nov 26, 2024 | Officer | 26K | – | – | Nov 26, 2024 | |
| CAMPBELL JEFFREY C Last trade Aug 6, 2018 | Director | 13K | – | – | Aug 6, 2018 | |
| Zeidel Darren General Counsel Last trade Jul 28, 2026 | Officer | 13K | – | $7.8M | net selling over the year: 0 months buying, 3 months selling | Jul 28, 2026 |
| Neller Michael Principal Accounting Officer Last trade Feb 15, 2024 | Officer | 11K | – | – | Feb 15, 2024 | |
| Marcell Andy Global CEO, Solution Lines | CEO | 9,149 | – | – | – |
Open-market trade log
the 60 most recent of 1,920| Date | Insider | Type | Shares | Price | Value | Since trade | Filed |
|---|---|---|---|---|---|---|---|
| Sep 2, 2026 | KNIGHT LESTER B (Director) 367 shares $330.51 −0.7% since trade filed Sep 3, 2026 | Open-market buy | 367 | $330.51 | $121K | −0.7% | Sep 3, 2026 |
| Sep 2, 2026 | KNIGHT LESTER B (Director) 1,440 shares $329.69 −0.4% since trade filed Sep 3, 2026 | Open-market buy | 1,440 | $329.69 | $475K | −0.4% | Sep 3, 2026 |
| Sep 2, 2026 | KNIGHT LESTER B (Director) 1,739 shares $325.63 +0.8% since trade filed Sep 3, 2026 | Open-market buy | 1,739 | $325.63 | $566K | +0.8% | Sep 3, 2026 |
| Sep 2, 2026 | KNIGHT LESTER B (Director) 4,145 shares $328.34 +0.0% since trade filed Sep 3, 2026 | Open-market buy | 4,145 | $328.34 | $1.4M | +0.0% | Sep 3, 2026 |
| Sep 2, 2026 | KNIGHT LESTER B (Director) 5,097 shares $326.53 +0.6% since trade filed Sep 3, 2026 | Open-market buy | 5,097 | $326.53 | $1.7M | +0.6% | Sep 3, 2026 |
| Sep 2, 2026 | KNIGHT LESTER B (Director) 7,212 shares $327.52 +0.3% since trade filed Sep 3, 2026 | Open-market buy | 7,212 | $327.52 | $2.4M | +0.3% | Sep 3, 2026 |
| Jul 28, 2026 | Zeidel Darren (Officer) 475 shares $380.00 −13.6% since trade filed Jul 30, 2026 | Planned sale (10b5-1) | 475 | $380.00 | $181K | −13.6% | Jul 30, 2026 |
| Jul 28, 2026 | Zeidel Darren (Officer) 700 shares $376.00 −12.7% since trade filed Jul 30, 2026 | Planned sale (10b5-1) | 700 | $376.00 | $263K | −12.7% | Jul 30, 2026 |
| Jul 28, 2026 | Zeidel Darren (Officer) 725 shares $378.00 −13.1% since trade filed Jul 30, 2026 | Planned sale (10b5-1) | 725 | $378.00 | $274K | −13.1% | Jul 30, 2026 |
| Jul 17, 2026 | Zeidel Darren (Officer) 625 shares $370.00 −11.3% since trade filed Jul 21, 2026 | Planned sale (10b5-1) | 625 | $370.00 | $231K | −11.3% | Jul 21, 2026 |
| Jul 17, 2026 | Zeidel Darren (Officer) 650 shares $372.00 −11.7% since trade filed Jul 21, 2026 | Planned sale (10b5-1) | 650 | $372.00 | $242K | −11.7% | Jul 21, 2026 |
| Jul 17, 2026 | Zeidel Darren (Officer) 675 shares $374.00 −12.2% since trade filed Jul 21, 2026 | Planned sale (10b5-1) | 675 | $374.00 | $252K | −12.2% | Jul 21, 2026 |
| Jul 7, 2026 | Zeidel Darren (Officer) 600 shares $360.00 −8.8% since trade filed Jul 9, 2026 | Planned sale (10b5-1) | 600 | $360.00 | $216K | −8.8% | Jul 9, 2026 |
| Feb 26, 2026 | Zeidel Darren (Officer) 4,300 shares $329.72 −0.4% since trade filed Mar 2, 2026 | Discretionary sale | 4,300 | $329.72 | $1.4M | −0.4% | Mar 2, 2026 |
| Feb 17, 2026 | Zeidel Darren (Officer) 5,040 shares $325.79 +0.8% since trade filed Feb 19, 2026 | Planned sale (10b5-1) | 5,040 | $325.79 | $1.6M | +0.8% | Feb 19, 2026 |
| Feb 10, 2026 | KNIGHT LESTER B (Director) 4,000 shares $319.24 +2.9% since trade filed Feb 12, 2026 | Open-market buy | 4,000 | $319.24 | $1.3M | +2.9% | Feb 12, 2026 |
| Nov 5, 2025 | Zeidel Darren (Officer) 1,230 shares $345.17 −4.9% since trade filed Nov 7, 2025 | Discretionary sale | 1,230 | $345.17 | $425K | −4.9% | Nov 7, 2025 |
| Nov 5, 2025 | Zeidel Darren (Officer) 7,570 shares $344.42 −4.7% since trade filed Nov 7, 2025 | Discretionary sale | 7,570 | $344.42 | $2.6M | −4.7% | Nov 7, 2025 |
| Nov 27, 2024 | Simon Mindy F. (COO) 650 shares $394.34 −16.7% since trade filed Dec 2, 2024 | Discretionary sale | 650 | $394.34 | $256K | −16.7% | Dec 2, 2024 |
| Nov 26, 2024 | Stevens Lisa (Officer) 1,275 shares $387.68 −15.3% since trade filed Nov 29, 2024 | Discretionary sale | 1,275 | $387.68 | $494K | −15.3% | Nov 29, 2024 |
| Aug 28, 2024 | Spruell Byron (Director) 725 shares $340.08 −3.5% since trade filed Aug 29, 2024 | Open-market buy | 725 | $340.08 | $247K | −3.5% | Aug 29, 2024 |
| Aug 12, 2024 | Zeidel Darren (Officer) 950 shares $329.15 −0.3% since trade filed Aug 14, 2024 | Discretionary sale | 950 | $329.15 | $313K | −0.3% | Aug 14, 2024 |
| Aug 12, 2024 | Stevens Lisa (Officer) 400 shares $328.95 −0.2% since trade filed Aug 14, 2024 | Discretionary sale | 400 | $328.95 | $132K | −0.2% | Aug 14, 2024 |
| Jul 26, 2024 | Zeidel Darren (Officer) 6,597 shares $310.00 +5.9% since trade filed Jul 30, 2024 | Planned sale (10b5-1) | 6,597 | $310.00 | $2.0M | +5.9% | Jul 30, 2024 |
| May 3, 2024 | KNIGHT LESTER B (Director) 1,109 shares $277.50 +18.3% since trade filed May 7, 2024 | Open-market buy | 1,109 | $277.50 | $308K | +18.3% | May 7, 2024 |
| May 3, 2024 | KNIGHT LESTER B (Director) 1,466 shares $275.76 +19.1% since trade filed May 7, 2024 | Open-market buy | 1,466 | $275.76 | $404K | +19.1% | May 7, 2024 |
| May 3, 2024 | KNIGHT LESTER B (Director) 2,426 shares $276.72 +18.7% since trade filed May 7, 2024 | Open-market buy | 2,426 | $276.72 | $671K | +18.7% | May 7, 2024 |
| Mar 6, 2024 | Stevens Lisa (Officer) 315 shares $316.31 +3.8% since trade filed Mar 8, 2024 | Discretionary sale | 315 | $316.31 | $100K | +3.8% | Mar 8, 2024 |
| Mar 1, 2024 | Andersen Eric (Officer) 5,500 shares $313.74 +4.7% since trade filed Mar 5, 2024 | Discretionary sale | 5,500 | $313.74 | $1.7M | +4.7% | Mar 5, 2024 |
| Feb 23, 2024 | Stevens Lisa (Officer) 13K shares $315.26 +4.2% since trade filed Feb 26, 2024 | Discretionary sale | 13K | $315.26 | $4.1M | +4.2% | Feb 26, 2024 |
| Feb 16, 2024 | Davies Christa (CFO) 40K shares $313.29 +4.8% since trade filed Feb 20, 2024 | Discretionary sale | 40K | $313.29 | $13M | +4.8% | Feb 20, 2024 |
| Feb 15, 2024 | Neller Michael (Officer) 750 shares $312.00 +5.2% since trade filed Feb 20, 2024 | Discretionary sale | 750 | $312.00 | $234K | +5.2% | Feb 20, 2024 |
| Feb 12, 2024 | Davies Christa (CFO) 1,033 shares $312.39 +5.1% since trade filed Feb 13, 2024 | Discretionary sale | 1,033 | $312.39 | $323K | +5.1% | Feb 13, 2024 |
| Feb 12, 2024 | Davies Christa (CFO) 6,749 shares $310.75 +5.7% since trade filed Feb 13, 2024 | Discretionary sale | 6,749 | $310.75 | $2.1M | +5.7% | Feb 13, 2024 |
| Feb 12, 2024 | Davies Christa (CFO) 13K shares $311.66 +5.4% since trade filed Feb 13, 2024 | Discretionary sale | 13K | $311.66 | $4.0M | +5.4% | Feb 13, 2024 |
| Feb 7, 2024 | KNIGHT LESTER B (Director) 25K shares $301.97 +8.7% since trade filed Feb 9, 2024 | Open-market buy | 25K | $301.97 | $7.5M | +8.7% | Feb 9, 2024 |
| Aug 23, 2023 | Spruell Byron (Director) 800 shares $324.58 +1.2% since trade filed Aug 24, 2023 | Open-market buy | 800 | $324.58 | $260K | +1.2% | Aug 24, 2023 |
| May 9, 2023 | Andersen Eric (Officer) 7,500 shares $335.55 −2.2% since trade filed May 11, 2023 | Discretionary sale | 7,500 | $335.55 | $2.5M | −2.2% | May 11, 2023 |
| Feb 21, 2023 | Davies Christa (CFO) 1,523 shares $306.87 +7.0% since trade filed Feb 22, 2023 | Discretionary sale | 1,523 | $306.87 | $467K | +7.0% | Feb 22, 2023 |
| Feb 21, 2023 | Davies Christa (CFO) 3,797 shares $306.11 +7.3% since trade filed Feb 22, 2023 | Discretionary sale | 3,797 | $306.11 | $1.2M | +7.3% | Feb 22, 2023 |
| Feb 21, 2023 | Davies Christa (CFO) 6,455 shares $304.15 +8.0% since trade filed Feb 22, 2023 | Discretionary sale | 6,455 | $304.15 | $2.0M | +8.0% | Feb 22, 2023 |
| Feb 21, 2023 | Davies Christa (CFO) 8,753 shares $305.08 +7.6% since trade filed Feb 22, 2023 | Discretionary sale | 8,753 | $305.08 | $2.7M | +7.6% | Feb 22, 2023 |
| Feb 17, 2023 | Davies Christa (CFO) 300 shares $310.78 +5.7% since trade filed Feb 22, 2023 | Discretionary sale | 300 | $310.78 | $93K | +5.7% | Feb 22, 2023 |
| Feb 17, 2023 | Davies Christa (CFO) 3,845 shares $309.54 +6.1% since trade filed Feb 22, 2023 | Discretionary sale | 3,845 | $309.54 | $1.2M | +6.1% | Feb 22, 2023 |
| Feb 17, 2023 | Davies Christa (CFO) 47K shares $310.19 +5.9% since trade filed Feb 22, 2023 | Discretionary sale | 47K | $310.19 | $15M | +5.9% | Feb 22, 2023 |
| Feb 16, 2023 | Neller Michael (Officer) 1,000 shares $311.59 +5.4% since trade filed Feb 21, 2023 | Discretionary sale | 1,000 | $311.59 | $312K | +5.4% | Feb 21, 2023 |
| Feb 13, 2023 | Davies Christa (CFO) 617 shares $318.36 +3.1% since trade filed Feb 14, 2023 | Discretionary sale | 617 | $318.36 | $196K | +3.1% | Feb 14, 2023 |
| Aug 23, 2022 | Spruell Byron (Director) 400 shares $291.72 +12.6% since trade filed Aug 25, 2022 | Open-market buy | 400 | $291.72 | $117K | +12.6% | Aug 25, 2022 |
| Aug 4, 2022 | Neller Michael (Officer) 900 shares $284.45 +15.4% since trade filed Aug 9, 2022 | Discretionary sale | 900 | $284.45 | $256K | +15.4% | Aug 9, 2022 |
| Jul 28, 2022 | Zeidel Darren (Officer) 111 shares $290.00 +13.2% since trade filed Aug 1, 2022 | Discretionary sale | 111 | $290.00 | $32K | +13.2% | Aug 1, 2022 |
| May 5, 2022 | KNIGHT LESTER B (Director) 4,000 shares $286.53 +14.6% since trade filed May 9, 2022 | Open-market buy | 4,000 | $286.53 | $1.1M | +14.6% | May 9, 2022 |
| May 5, 2022 | KNIGHT LESTER B (Director) 10K shares $286.60 +14.6% since trade filed May 9, 2022 | Open-market buy | 10K | $286.60 | $2.9M | +14.6% | May 9, 2022 |
| Mar 16, 2022 | Zeidel Darren (Officer) 82 shares $308.31 +6.5% since trade filed Mar 17, 2022 | Discretionary sale | 82 | $308.31 | $25K | +6.5% | Mar 17, 2022 |
| Feb 25, 2022 | Zeidel Darren (Officer) 317 shares $290.00 +13.2% since trade filed Mar 1, 2022 | Discretionary sale | 317 | $290.00 | $92K | +13.2% | Mar 1, 2022 |
| Feb 23, 2022 | Andersen Eric (Officer) 201 shares $282.97 +16.0% since trade filed Feb 25, 2022 | Discretionary sale | 201 | $282.97 | $57K | +16.0% | Feb 25, 2022 |
| Feb 23, 2022 | Andersen Eric (Officer) 7,299 shares $282.56 +16.2% since trade filed Feb 25, 2022 | Discretionary sale | 7,299 | $282.56 | $2.1M | +16.2% | Feb 25, 2022 |
| Feb 22, 2022 | Neller Michael (Officer) 1,250 shares $285.00 +15.2% since trade filed Feb 24, 2022 | Discretionary sale | 1,250 | $285.00 | $356K | +15.2% | Feb 24, 2022 |
| Feb 18, 2022 | Davies Christa (CFO) 750 shares $279.93 +17.3% since trade filed Feb 22, 2022 | Discretionary sale | 750 | $279.93 | $210K | +17.3% | Feb 22, 2022 |
| Feb 18, 2022 | Davies Christa (CFO) 1,626 shares $284.77 +15.3% since trade filed Feb 22, 2022 | Discretionary sale | 1,626 | $284.77 | $463K | +15.3% | Feb 22, 2022 |
| Feb 18, 2022 | Davies Christa (CFO) 4,584 shares $280.99 +16.9% since trade filed Feb 22, 2022 | Discretionary sale | 4,584 | $280.99 | $1.3M | +16.9% | Feb 22, 2022 |
“Since trade” compares with the latest insider-implied price, not a market quote: these pages are built from filings alone. A role here is the one on that day's Form 4, so somebody promoted since appears under both titles.
Filing hygiene
129 Forms 4, 3 years
1 filed late
0 amendments
2.2 avg. days to file
How to read this
A Form 4 transaction code decides everything. P is an open-market purchase and S an open-market sale; those two are the only codes where an insider chose to trade. A is a grant, M an option exercise or vesting, F shares withheld to cover tax, G a gift. Most “insiders dumped billions” headlines are code F and M mechanics.
Sales flagged 10b5-1 run on a plan the insider adopted in advance; since 2023 every Form 4 carries that flag. Buys have historically predicted returns, sales mostly have not, and this page states filings, not advice.