John Zern

Insider

First SEC filing: May 11, 2017 · Latest: May 11, 2017

On this page

Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.

Insider at

AON selling Feb. 2, 2018

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 39 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

39 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Aug. 21, 2019	AON	M	1,150	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Aug. 21, 2019	AON	F	510	$193.17	$98,517	38,018 Direct	-1.32%	Disposed	81.5% (price as of 2026-08-20)
Aug. 21, 2019	AON	M	1,150	—	—	38,528 Direct	+3.08%	Acquired	(price as of 2026-08-20)
Feb. 15, 2019	AON	M	521	—	—	1,044 Direct	-33.29%	Disposed	(price as of 2026-08-20)
Feb. 15, 2019	AON	M	537	—	—	538 Direct	-49.95%	Disposed	(price as of 2026-08-20)
Feb. 15, 2019	AON	M	741	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 15, 2019	AON	F	231	$171.97	$39,725	37,378 Direct	-0.61%	Disposed	103.9% (price as of 2026-08-20)
Feb. 15, 2019	AON	M	521	—	—	37,609 Direct	+1.40%	Acquired	(price as of 2026-08-20)
Feb. 15, 2019	AON	F	238	$171.97	$40,929	37,088 Direct	-0.64%	Disposed	103.9% (price as of 2026-08-20)
Feb. 15, 2019	AON	M	537	—	—	37,326 Direct	+1.46%	Acquired	(price as of 2026-08-20)
Feb. 15, 2019	AON	F	329	$171.97	$56,578	36,789 Direct	-0.89%	Disposed	103.9% (price as of 2026-08-20)
Feb. 15, 2019	AON	M	741	—	—	37,118 Direct	+2.04%	Acquired	(price as of 2026-08-20)
Feb. 14, 2019	AON	A	1,444	—	—	1,444 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 14, 2019	AON	F	6,925	$169.62	$1,174,618	36,377 Direct	-15.99%	Disposed	106.7% (price as of 2026-08-20)
Feb. 14, 2019	AON	A	17,603	—	—	43,302 Direct	+68.50%	Acquired	(price as of 2026-08-20)
Aug. 21, 2018	AON	M	1,150	—	—	1,150 Direct	-50.00%	Disposed	(price as of 2026-08-20)
Aug. 21, 2018	AON	F	510	$144.36	$73,624	25,699 Direct	-1.95%	Disposed	142.9% (price as of 2026-08-20)
Aug. 21, 2018	AON	M	1,150	—	—	26,209 Direct	+4.59%	Acquired	(price as of 2026-08-20)
May 21, 2018	AON	M	302	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 21, 2018	AON	F	134	$142.08	$19,039	25,059 Direct	-0.53%	Disposed	146.8% (price as of 2026-08-20)
May 21, 2018	AON	M	302	—	—	25,193 Direct	+1.21%	Acquired	(price as of 2026-08-20)
Feb. 16, 2018	AON	M	537	—	—	1,075 Direct	-33.31%	Disposed	(price as of 2026-08-20)
Feb. 16, 2018	AON	M	740	—	—	741 Direct	-49.97%	Disposed	(price as of 2026-08-20)
Feb. 16, 2018	AON	M	582	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 16, 2018	AON	F	238	$140.86	$33,525	24,891 Direct	-0.95%	Disposed	148.9% (price as of 2026-08-20)
Feb. 16, 2018	AON	M	537	—	—	25,129 Direct	+2.18%	Acquired	(price as of 2026-08-20)
Feb. 16, 2018	AON	F	328	$140.86	$46,202	24,592 Direct	-1.32%	Disposed	148.9% (price as of 2026-08-20)
Feb. 16, 2018	AON	M	740	—	—	24,920 Direct	+3.06%	Acquired	(price as of 2026-08-20)
Feb. 16, 2018	AON	F	258	$140.86	$36,342	24,180 Direct	-1.06%	Disposed	148.9% (price as of 2026-08-20)
Feb. 16, 2018	AON	M	582	—	—	24,438 Direct	+2.44%	Acquired	(price as of 2026-08-20)
Feb. 15, 2018	AON	A	1,565	—	—	1,565 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 15, 2018	AON	F	6,785	$140.89	$955,939	23,856 Direct	-22.14%	Disposed	148.9% (price as of 2026-08-20)
Feb. 15, 2018	AON	A	17,693	—	—	30,641 Direct	+136.65%	Acquired	(price as of 2026-08-20)
Feb. 2, 2018	AON	S 10b5-1	14,747	$147.00	$2,167,809	12,948 Direct	-53.25%	Disposed	138.5% (price as of 2026-08-20)
Nov. 30, 2017	AON	S	17,680	$139.79	$2,471,487	27,695 Direct	-38.96%	Disposed	150.8% (price as of 2026-08-20)
Aug. 21, 2017	AON	M	1,150	—	—	2,300 Direct	-33.33%	Disposed	(price as of 2026-08-20)
Aug. 21, 2017	AON	F	526	$138.17	$72,677	45,375 Direct	-1.15%	Disposed	153.8% (price as of 2026-08-20)
Aug. 21, 2017	AON	M	1,150	—	—	45,901 Direct	+2.57%	Acquired	(price as of 2026-08-20)
May 19, 2017	AON	M	302	—	—	302 Direct	-50.00%	Disposed	(price as of 2026-08-20)
May 19, 2017	AON	F	139	$127.28	$17,692	44,751 Direct	-0.31%	Disposed	175.5% (price as of 2026-08-20)
May 19, 2017	AON	M	302	—	—	44,890 Direct	+0.68%	Acquired	(price as of 2026-08-20)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
Aug. 21, 2019	AON	Restricted Share Unit (Right to Receive)	Class A Ordinary Shares (1,150)	—	Aug. 21, 2019	1,150	Disposed
Feb. 15, 2019	AON	Restricted Share Unit (Right to Receive)	Class A Ordinary Shares (521)	—	Feb. 15, 2021	521	Disposed
Feb. 15, 2019	AON	Restricted Share Unit (Right to Receive)	Class A Ordinary Shares (538)	—	Feb. 16, 2020	537	Disposed
Feb. 15, 2019	AON	Restricted Share Unit (Right to Receive)	Class A Ordinary Shares (0)	—	Feb. 18, 2019	741	Disposed
Feb. 14, 2019	AON	Restrictive Share Unit (Right to Receive)	Class A Ordinary Shares (1,444)	—	Feb. 14, 2022	1,444	Acquired
Aug. 21, 2018	AON	Restricted Share Unit (Right to Receive)	Class A Ordinary Shares (1,150)	—	Aug. 21, 2019	1,150	Disposed
May 21, 2018	AON	Restricted Share Unit (Right to Receive)	Class A Ordinary Shares (302)	—	May 21, 2018	302	Disposed
Feb. 16, 2018	AON	Restricted Share Unit (Right to Receive)	Class A Ordinary Shares (537)	—	Feb. 16, 2020	537	Disposed
Feb. 16, 2018	AON	Restricted Share Unit (Right to Receive)	Class A Ordinary Shares (740)	—	Feb. 18, 2019	740	Disposed
Feb. 16, 2018	AON	Restricted Share Unit (Right to Receive)	Class A Ordinary Shares (582)	—	Feb. 19, 2018	582	Disposed
Feb. 15, 2018	AON	Restricted Share Unit (Right to Receive)	Class A Ordinary Shares (1,565)	—	Feb. 15, 2021	1,565	Acquired
Aug. 21, 2017	AON	Restricted Share Units (Right to Receive)	Class A Ordinary Shares (1,150)	—	Aug. 21, 2019	1,150	Disposed
May 19, 2017	AON	Restricted Share Units (Right to Receive)	Class A Ordinary Shares (302)	—	May 21, 2018	302	Disposed

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 6 holdings

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
May 11, 2017	AON	Class A Ordinary Shares	44,588	Direct
May 11, 2017	AON	Restricted Share Units (Right to Receive)→ Class A Ordinary Shares (604)	604	Direct
May 11, 2017	AON	Restricted Share Unit (Right to Receive)→ Class A Ordinary Shares (3,450)	3,450	Direct
May 11, 2017	AON	Restricted Share Unit (Right to Receive)→ Class A Ordinary Shares (582)	582	Direct
May 11, 2017	AON	Restricted Share Unit (Right to Receive)→ Class A Ordinary Shares (1,481)	1,481	Direct
May 11, 2017	AON	Restricted Share Unit (Right to Receive)→ Class A Ordinary Shares (1,612)	1,612	Direct