Hyliion Holdings HYLN Insider Ownership

NYSE HYLN

$3.05 -0.23 (-7.16%)

As of: Oct 16, 2026 · 3:59 PM EDT

Insider Holdings by Owner

48.31Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

22.90%

▲+0.427% pp QoQ

Shares Held by Insiders

40.87Mn

filed for Sep 2026

▲+1.90% QoQ

Shares Outstanding

178.44Mn

178,441,616 shares

Direct Holdings

40.87Mn

Indirect: 0

Net Shares Traded (QoQ)

+761.93K

net buying in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Over the past year, HYLN insiders bought $170,000 of stock (50K shares) on the open market and sold none.

Among HYLN's insiders, Vincent T. Cubbage (Director) was the top open-market buyer in the past 12 months, with $170,000 of stock purchased (50K shares) and the latest purchase on August 27, 2026.
In transactions other than open-market trades, Hyliion Holdings insiders received 1.28Mn shares in stock awards, acquired 772.85K shares through option exercises and conversions, gave up 37.27K shares to cover taxes or exercise prices and gave away 2.57Mn shares as gifts over the past 12 months.
Per Business Quant, HYLN insiders together hold 40.87Mn shares based on their latest Form 4 filings, up 1.90% from 40.11Mn shares at the end of Q2 2026 and down 3.01% from 42.14Mn shares at the end of Q3 2025.
None of the 40.87Mn shares held by Hyliion Holdings insiders is held through trusts, partnerships or family members; all are direct holdings.
Holdings in Hyliion Holdings stock are reported by 14 insiders, the officers, directors and 10% owners who have filed a Form 4 in the past two years.
HYLN's largest insider holders by reported holdings are Thomas J. Healy (Chief Executive Officer, 33.21Mn shares), Joshua T. Mook (Chief Technology Officer, 1.22Mn shares) and Vincent T. Cubbage (Director, 1.13Mn shares).
Of the shares held by HYLN insiders, 81.25% belong to Thomas J. Healy.
Institutional holders reported 33.38% of Hyliion Holdings' outstanding shares for Q2 2026; insiders' latest Form 4 filings put their stake at about 22.90%, and other investors, including the public, hold the remaining 43.72%.
Over the trailing 12 months, 14 insiders reported transactions in HYLN stock across 65 Form 4 filings.
This summary of Hyliion Holdings insider activity covers Form 4 filings through October 1, 2026.

Form 4 Holdings

Insiders Holding HYLN

Insiders 22

Shares held 48.31Mn

Of outstanding 27.07%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	Thomas J. Healy	Chief Executive Officer	33,206,711	33,206,711	68.7%	01 Oct, 2026
2	Howard M Jenkins	Director	5,213,435	5,213,435	10.8%	15 Mar, 2023
3	Joshua T. Mook	Chief Technology Officer	1,223,928	1,223,928	2.5%	01 Oct, 2026
4	Vincent T. Cubbage	Director	1,125,613	1,125,613	2.3%	01 Oct, 2026
5	Jon Panzer	Chief Financial Officer	1,070,147	1,070,147	2.2%	01 Oct, 2026
6	Jose Miguel Oxholm	Chief Legalcompliance Officer	873,547	873,547	1.8%	01 Oct, 2026
7	Edward E Olkkola	Director	863,045	863,045	1.8%	28 Feb, 2022
8	Cheri Lantz	Chief Strategy Officer	730,204	730,204	1.5%	04 Mar, 2026
9	Govindaraj Ramasamy	Chief Commercial Officer	593,920	593,920	1.2%	21 Aug, 2026
10	Dennis M. Gallagher	Chief Operating Officer	476,575	476,575	1.0%	18 Dec, 2023
11	Jeffrey A Craig	Director	402,845	402,845	0.8%	13 Feb, 2026
12	Robert M Jr Knight	Director	375,345	375,345	0.8%	13 Feb, 2026
13	Patrick Sexton	Chief Technology Officer	364,499	364,499	0.8%	26 Apr, 2022
14	Greg Standley	Chief Accounting Officer.	287,751	287,751	0.6%	01 Oct, 2026
15	Richard Joseph Freeland	Director	283,774	283,774	0.6%	13 Feb, 2026
16	Mary Gustanski	Director	256,379	256,379	0.5%	13 Feb, 2026
17	Sherri Baker	Chief Financial Officer	236,985	236,985	0.5%	28 Feb, 2022
18	Melanie Montague Trent	Director	218,774	218,774	0.5%	13 Feb, 2026
19	Rodger L Boehm	Director	218,474	218,474	0.5%	13 Feb, 2026
20	Stephen S. Pang	Director	130,009	130,009	0.3%	15 Mar, 2023
21	Andrew H Jr Card	Director	101,435	101,435	0.2%	15 Nov, 2023
22	Elaine L. Chao	Director	57,606	57,606	0.1%	15 Mar, 2023

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

477 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
30 Sep, 2026	Jose Miguel Oxholm	Chief Legalcompliance Officer	Acquired C	52,392	$0.00	$0	802,206	Direct
30 Sep, 2026	Vincent T. Cubbage	Director	Disposed G	5,750	$0.00	$0	1,125,613	Direct
30 Sep, 2026	Greg Standley	Chief Accounting Officer.	Acquired C	16,633	$0.00	$0	270,201	Direct
30 Sep, 2026	Joshua T. Mook	Chief Technology Officer	Acquired C	55,981	$0.00	$0	1,152,587	Direct
30 Sep, 2026	Jon Panzer	Chief Financial Officer	Acquired C	59,210	$0.00	$0	994,690	Direct
30 Sep, 2026	Thomas J. Healy	Chief Executive Officer	Acquired C	202,033	$0.00	$0	32,984,455	Direct
30 Sep, 2026	Jose Miguel Oxholm	Chief Legalcompliance Officer	Acquired C	71,341	$0.00	$0	873,547	Direct
30 Sep, 2026	Joshua T. Mook	Chief Technology Officer	Acquired C	71,341	$0.00	$0	1,223,928	Direct
30 Sep, 2026	Thomas J. Healy	Chief Executive Officer	Acquired C	222,256	$0.00	$0	33,206,711	Direct
30 Sep, 2026	Jon Panzer	Chief Financial Officer	Acquired C	75,457	$0.00	$0	1,070,147	Direct
30 Sep, 2026	Greg Standley	Chief Accounting Officer.	Acquired C	17,550	$0.00	$0	287,751	Direct
30 Sep, 2026	Thomas J. Healy	Chief Executive Officer	Disposed C	202,033	$0.00	$0	808,135	Direct
30 Sep, 2026	Joshua T. Mook	Chief Technology Officer	Disposed C	55,981	$0.00	$0	223,924	Direct
30 Sep, 2026	Jon Panzer	Chief Financial Officer	Disposed C	59,210	$0.00	$0	236,843	Direct
30 Sep, 2026	Greg Standley	Chief Accounting Officer.	Disposed C	16,633	$0.00	$0	66,532	Direct
30 Sep, 2026	Jose Miguel Oxholm	Chief Legalcompliance Officer	Disposed C	52,392	$0.00	$0	209,570	Direct
30 Sep, 2026	Thomas J. Healy	Chief Executive Officer	Disposed C	222,256	$0.00	$0	666,768	Direct
30 Sep, 2026	Greg Standley	Chief Accounting Officer.	Disposed C	17,550	$0.00	$0	52,653	Direct
30 Sep, 2026	Joshua T. Mook	Chief Technology Officer	Disposed C	71,341	$0.00	$0	214,025	Direct
30 Sep, 2026	Jose Miguel Oxholm	Chief Legalcompliance Officer	Disposed C	71,341	$0.00	$0	214,025	Direct

Showing 1 to 20 of 477 transactions