Genelux GNLX Insider Ownership

NASDAQ GNLX

$2.41 -0.09 (-3.60%)

As of: Oct 21, 2026 · 1:02 PM EDT

Insider Holdings by Owner

4.07Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

7.77%

▼-7.77% pp QoQ

Shares Held by Insiders

3.51Mn

filed for Sep 2026

▼-50.00% QoQ

Shares Outstanding

45.10Mn

45,103,461 shares

Direct Holdings

3.31Mn

Indirect: 200.00K

Net Shares Traded (QoQ)

-3.51Mn

net selling 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

Across the past 12 months, open-market trades by Genelux insiders were all sales, totaling $328,574 (110.28K shares).

By number of insiders, Genelux saw 6 insiders sell on the open market over the past 12 months and none buy.
Thomas Zindrick (President and CEO) was GNLX's largest open-market seller in the past 12 months, with $117,698 of sales (43.87K shares); the latest was on August 31, 2026.
In transactions other than open-market trades, Genelux insiders received 1.57Mn shares in stock awards over the past 12 months.
Business Quant data shows Genelux insiders holding 3.51Mn shares in total in their latest Form 4 filings.
Of the 3.51Mn shares held by Genelux insiders, 3.31Mn shares (94.30%) are held directly and 200K shares (5.70%) indirectly, through trusts, partnerships, family members and other entities.
The insider holdings in Genelux belong to 12 insiders who have reported on Form 4 within the past two years.
GNLX's largest insider holders by reported holdings are Thomas Zindrick (President and CEO, 1.43Mn shares), John Thomas (Director, 501.19K shares) and Joseph Cappello (Chief Technical Officer, 318.48K shares).
The holding of Thomas Zindrick makes up 40.69% of all shares held by Genelux insiders.
Institutions held 21.77% of Genelux's outstanding shares in their Q2 2026 13F filings, insiders about 7.77% based on their latest Form 4 filings, and other investors, including the public, the remaining 70.46%.
In the past year, 11 insiders of Genelux submitted 29 Form 4 filings reporting trades, awards or other transactions.
The insider data for GNLX reflects Form 4 filings through September 2, 2026.

Form 4 Holdings

Insiders Holding GNLX

Insiders 17

Shares held 4.07Mn

Of outstanding 9.03%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Thomas Zindrick	President And Ceo	1,226,427	0	1,226,427	30.1%	02 Sep, 2026
2	Aladar Szalay	TenPercentOwner	0	599,821	599,821	14.7%	13 Sep, 2024
3	John Thomas	Director	501,193	0	501,193	12.3%	18 Jun, 2026
4	Joseph Cappello	Chief Technical Officer	318,480	0	318,480	7.8%	02 Sep, 2026
5	Matthew Pulisic	Chief Financial Officer	278,906	0	278,906	6.8%	18 Jun, 2026
6	Yong Yu	Chief Scientific Officer	258,688	0	258,688	6.4%	02 Sep, 2026
7	Eric Groen	General Counsel	233,957	0	233,957	5.7%	18 Jun, 2026
8	Qian Zhang	Associate Vp, Research	139,333	0	139,333	3.4%	02 May, 2023
9	Mary Mirabelli	Director	102,693	0	102,693	2.5%	18 Jun, 2026
10	James L Tyree	Director	96,483	0	96,483	2.4%	18 Jun, 2026
11	John W Smither	Director	91,403	0	91,403	2.2%	02 Jul, 2026
12	Lourie S. Zak	Chief Financial Officer	82,452	0	82,452	2.0%	20 Dec, 2024
13	Ralph Smalling	Head Of Regulatory	67,611	0	67,611	1.7%	04 Jun, 2026
14	Sean Ryder	General Counsel	47,621	0	47,621	1.2%	13 May, 2025
15	Caroline Jewett	Head Of Quality	21,135	0	21,135	0.5%	12 Sep, 2023
16	Gabe Woodward	Director	4,186	0	4,186	0.1%	02 May, 2023
17	Doug Samuelson	Chief Financial Officer	2,303	0	2,303	0.1%	22 Aug, 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

280 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
31 Aug, 2026	Yong Yu	Chief Scientific Officer	Disposed S	9,683	$2.75	$26.66K	258,688	Direct
31 Aug, 2026	Joseph Cappello	Chief Technical Officer	Disposed S	10,257	$2.74	$28.11K	318,480	Direct
31 Aug, 2026	Thomas Zindrick	President And Ceo	Disposed S	34,463	$2.67	$91.90K	1,226,427	Direct
04 Aug, 2026	Yong Yu	Chief Scientific Officer	Disposed S	653	$2.94	$1.92K	268,371	Direct
04 Aug, 2026	Joseph Cappello	Chief Technical Officer	Disposed S	653	$2.95	$1.92K	328,737	Direct
04 Aug, 2026	Thomas Zindrick	President And Ceo	Disposed S	3,023	$2.95	$8.91K	1,260,890	Direct
01 Jul, 2026	John W Smither	Director	Disposed S	12,000	$2.91	$34.90K	91,403	Direct
16 Jun, 2026	Eric Groen	General Counsel	Acquired A	233,957	$0.00	$0	233,957	Direct
16 Jun, 2026	John W Smither	Director	Acquired A	28,409	$0.00	$0	103,403	Direct
16 Jun, 2026	James L Tyree	Director	Acquired A	28,409	$0.00	$0	96,483	Direct
16 Jun, 2026	Matthew Pulisic	Chief Financial Officer	Acquired A	278,906	$0.00	$0	278,906	Direct
16 Jun, 2026	John Thomas	Director	Acquired A	28,409	$0.00	$0	501,193	Direct
16 Jun, 2026	Thomas Zindrick	President And Ceo	Acquired A	730,601	$0.00	$0	1,263,913	Direct
16 Jun, 2026	Yong Yu	Chief Scientific Officer	Acquired A	119,318	$0.00	$0	269,024	Direct
16 Jun, 2026	Mary Mirabelli	Director	Acquired A	28,409	$0.00	$0	102,693	Direct
16 Jun, 2026	Joseph Cappello	Chief Technical Officer	Acquired A	174,841	$0.00	$0	329,390	Direct
16 Jun, 2026	John W Smither	Director	Acquired A	31,566	$0.00	$0	31,566	Direct
16 Jun, 2026	Mary Mirabelli	Director	Acquired A	31,566	$0.00	$0	31,566	Direct
16 Jun, 2026	James L Tyree	Director	Acquired A	31,566	$0.00	$0	31,566	Direct
16 Jun, 2026	John Thomas	Director	Acquired A	31,566	$0.00	$0	31,566	Direct

Showing 1 to 20 of 280 transactions