Gentherm THRM Insider Ownership

NASDAQ THRM

$28.44 -0.83 (-2.84%)

At close: Oct 21, 2026 · 4:00 PM EDT

Insider Holdings by Owner

941.41K Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

2.65%

▼-0.018% pp QoQ

Shares Held by Insiders

812.27K

filed for Sep 2026

▼-0.69% QoQ

Shares Outstanding

30.71Mn

30,705,208 shares

Direct Holdings

812.27K

Indirect: 0

Net Shares Traded (QoQ)

-5.63K

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 Gentherm insiders were all sales, totaling $243,056 (5.62K shares).

Behind Gentherm's open-market sales in the past 12 months were 2 insiders, and no insider bought.
Wayne S. Kauffman III (SVP and General Counsel) was THRM's largest open-market seller in the past 12 months, with $203,087 of sales (4.7K shares); the latest was on July 29, 2026.
The latest open-market trade in THRM stock by an insider was a sale of 925 shares for $39,969 by Breisacher Nicholas (Chief Accounting Officer) on August 17, 2026.
Away from the open market, THRM insiders received 96.16K shares in stock awards and gave up 49.55K shares to cover taxes or exercise prices over the last 12 months.
Per Business Quant data, Gentherm insiders hold 814.95K shares in total based on their latest Form 4 filings, or 2.65% of the 30.71Mn shares outstanding; that total is down 0.36% from 817.9K shares at the end of Q2 2026 and up 5.58% from 771.91K shares at the end of Q3 2025.
None of the 814.95K shares held by Gentherm insiders is held through trusts, partnerships or family members; all are direct holdings.
Holdings in Gentherm stock are reported by 21 insiders, the officers, directors and 10% owners who have filed a Form 4 in the past two years.
Gentherm's three biggest insider holders are William T. Presley (President & CEO, 178.31K shares), Phillip Eyler (139.66K shares) and Jonathan C. Douyard (EVP, CFO, Treasurer, 69.64K shares), based on their latest Form 4 filings.
William T. Presley alone accounts for 21.88% of the shares held by Gentherm insiders.
In the last 12 months, 39 Form 4 filings with transactions in THRM stock came from 19 insiders.
The insider data for THRM reflects Form 4 filings through October 6, 2026.

Form 4 Holdings

Insiders Holding THRM

Insiders 27

Shares held 941.41K

Of outstanding 3.07%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	William T. Presley	President Ceo	178,314	178,314	18.9%	18 Mar, 2026
2	Phillip Eyler	President Ceo	139,663	139,663	14.8%	25 Feb, 2025
3	Jonathan C Douyard	Evp, Cfo, Treasurer	69,639	69,639	7.4%	18 Mar, 2026
4	Matteo Anversa	Evp, Cfo, Treasurer	47,472	47,472	5.0%	26 Mar, 2024
5	Jaymi Wilson	Svp, Chief Strategy Officer	42,726	42,726	4.5%	25 Mar, 2026
6	Sophie Desormiere	Director	42,303	42,303	4.5%	15 May, 2026
7	Barbara J Runyon	Svp, Chro	37,686	37,686	4.0%	25 Mar, 2026
8	Rafael Barkas	Svp Global Ops Supply Chain	31,893	31,893	3.4%	25 Mar, 2026
9	Vishnu Sundaram	Svp, Chief Technology Officer	28,473	28,473	3.0%	18 Mar, 2026
10	Thomas Stocker	President, Gentherm Tech.	28,085	28,085	3.0%	25 Mar, 2026
11	Wayne S Iii Kauffman	Svp And General Counsel	27,421	27,421	2.9%	30 Jul, 2026
12	John Stacey	Director	27,112	27,112	2.9%	15 May, 2026
13	Byron Shaw	Director	26,720	26,720	2.8%	22 May, 2023
14	Charles R. Kummeth	Director	25,937	25,937	2.8%	15 May, 2026
15	Ronald T Hundzinski	Director	22,298	22,298	2.4%	15 May, 2026
16	David W Heinzmann	Director	21,365	21,365	2.3%	15 May, 2026
17	Elizabeth Meter	Director	19,664	19,664	2.1%	15 May, 2026
18	Hui (Helen) Xu	Svp, General Manager, Asia	18,947	18,947	2.0%	05 Dec, 2024
19	Yijing Brentano	Svp, Strategy, Corp Dev, Ir	18,568	18,568	2.0%	04 Jun, 2024
20	Yvonne Hao	Director	18,530	18,530	2.0%	06 Jun, 2022
21	Chenglong Wang	Vp General Manager	17,231	17,231	1.8%	25 Mar, 2026
22	Kenneth E Washington	Director	15,257	15,257	1.6%	15 May, 2026
23	Matthew Fisch	Svp Chief Technology Officer	13,614	13,614	1.4%	15 Nov, 2022
24	Laura Michele Kowalchik	Director	13,395	13,395	1.4%	15 May, 2026
25	Breisacher Nicholas	Chief Accounting Officer	4,864	4,864	0.5%	18 Aug, 2026
26	Paul Anthony Mascarenas	Director	2,677	2,677	0.3%	06 Oct, 2026
27	Jennifer L. Zoldos	Chief Accounting Officer	1,553	1,553	0.2%	23 Jun, 2022

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

1,712 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
01 Oct, 2026	Paul Anthony Mascarenas	Director	Acquired A	2,677	$0.00	$0	2,677	Direct
17 Aug, 2026	Breisacher Nicholas	Chief Accounting Officer	Disposed S	925	$43.21	$39.97K	4,864	Direct
29 Jul, 2026	Wayne S Iii Kauffman	Svp And General Counsel	Disposed S	4,700	$43.21	$203.09K	27,421	Direct
14 May, 2026	John Stacey	Director	Acquired A	4,292	$0.00	$0	27,112	Direct
14 May, 2026	Laura Michele Kowalchik	Director	Acquired A	4,292	$0.00	$0	13,395	Direct
14 May, 2026	Ronald T Hundzinski	Director	Acquired A	4,292	$0.00	$0	22,298	Direct
14 May, 2026	Kenneth E Washington	Director	Acquired A	4,292	$0.00	$0	15,257	Direct
14 May, 2026	David W Heinzmann	Director	Acquired A	4,292	$0.00	$0	21,365	Direct
14 May, 2026	Sophie Desormiere	Director	Acquired A	4,292	$0.00	$0	42,303	Direct
14 May, 2026	Elizabeth Meter	Director	Acquired A	4,292	$0.00	$0	19,664	Direct
14 May, 2026	Charles R. Kummeth	Director	Acquired A	4,292	$0.00	$0	25,937	Direct
23 Mar, 2026	Wayne S Iii Kauffman	Svp And General Counsel	Acquired A	2,121	$0.00	$0	33,046	Direct
23 Mar, 2026	Chenglong Wang	Vp General Manager	Acquired A	266	$0.00	$0	17,231	Direct
23 Mar, 2026	Jaymi Wilson	Svp, Chief Strategy Officer	Acquired A	2,474	$0.00	$0	43,436	Direct
23 Mar, 2026	Thomas Stocker	President, Gentherm Tech.	Acquired A	2,474	$0.00	$0	29,200	Direct
23 Mar, 2026	Breisacher Nicholas	Chief Accounting Officer	Acquired A	353	$0.00	$0	5,891	Direct
23 Mar, 2026	Barbara J Runyon	Svp, Chro	Acquired A	2,121	$0.00	$0	38,647	Direct
23 Mar, 2026	Rafael Barkas	Svp Global Ops Supply Chain	Acquired A	2,121	$0.00	$0	32,500	Direct
23 Mar, 2026	Breisacher Nicholas	Chief Accounting Officer	Disposed F	102	$28.64	$2.92K	5,789	Direct
23 Mar, 2026	Thomas Stocker	President, Gentherm Tech.	Disposed F	1,115	$28.64	$31.93K	28,085	Direct

Showing 1 to 20 of 1,712 transactions