TriSalus Life Sciences TLSI Insider Ownership

NASDAQ TLSI

$3.66 +0.00 (+0.00%)

As of: Oct 21, 2026 · 3:08 PM EDT

Insider Holdings by Owner

18.99Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

21.68%

▼-0.449% pp QoQ

Shares Held by Insiders

12.64Mn

filed for Sep 2026

▼-2.03% QoQ

Shares Outstanding

58.30Mn

58,296,711 shares

Direct Holdings

12.01Mn

Indirect: 627.43K

Net Shares Traded (QoQ)

-261.83K

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

Over the past year, TLSI insiders bought $3.48 million of stock (1.13Mn shares) and sold $139,922 (35.16K shares) on the open market.

Behind TriSalus Life Sciences' open-market trades in the past 12 months were 5 insiders buying and 5 insiders selling.
Among TriSalus Life Sciences insiders, Michael P. Stansky (Director) led open-market buying over the past 12 months with $3.01 million of purchases (971.1K shares); the latest was on May 15, 2026.
On the sell side, Mary T. Szela (CEO and President) led open-market sales of TriSalus Life Sciences stock over the past 12 months with $79,383 (20.3K shares), most recently on March 17, 2026.
TriSalus Life Sciences' latest insider trade on the open market was a sale of 325 shares for $1,427 by Richard Marshak (Chief Commercial Officer) on October 5, 2026.
Away from the open market, TLSI insiders received 470.79K shares in stock awards and gave up 17.34K shares to cover taxes or exercise prices over the last 12 months.
Per Business Quant, TLSI insiders together hold 12.64Mn shares based on their latest Form 4 filings, down 2.06% from 12.9Mn shares at the end of Q2 2026.
Direct holdings account for 12.01Mn shares (95.04%) of TLSI's insider total, and indirect holdings through trusts, partnerships and family members for 627.43K shares (4.96%).
The insider holdings in TriSalus Life Sciences belong to 18 insiders who have reported on Form 4 within the past two years.
TLSI's largest insider holders by reported holdings are Frankenius Equity AB (10% owner, 6.23Mn shares), Michael P. Stansky (Director, 1.64Mn shares) and David J. Matlin (Director, 1.32Mn shares).
The holding of Frankenius Equity AB makes up 49.31% of all shares held by TriSalus Life Sciences insiders.
Institutions accounted for 37.31% of TLSI's outstanding shares in Q2 2026, insiders about 21.68% per their latest Form 4 filings, and other investors, including the public, about 41.01%.
A total of 36 Form 4 filings with transactions in TriSalus Life Sciences stock were made over the past 12 months, by 13 insiders.
The insider holdings and trades above for TriSalus Life Sciences reflect Form 4 filings through October 7, 2026.

Form 4 Holdings

Insiders Holding TLSI

Insiders 22

Shares held 18.99Mn

Of outstanding 32.58%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Acquisition Sponsor Llc Medtech	TenPercentOwner	6,250,000	0	6,250,000	32.9%	27 Jun, 2023
2	Equity Ab Frankenius	TenPercentOwner	6,230,748	0	6,230,748	32.8%	19 Dec, 2024
3	Michael P Stansky	Director	1,240,722	399,698	1,640,420	8.6%	18 May, 2026
4	David J Matlin	Director	1,323,210	0	1,323,210	7.0%	15 May, 2026
5	Mary T Szela	Ceo And President	1,074,990	0	1,074,990	5.7%	07 Oct, 2026
6	Kerry R Hicks	Director	542,790	0	542,790	2.9%	15 May, 2026
7	David Patience	Chief Financial Officer	261,107	0	261,107	1.4%	06 Jul, 2026
8	George Kelly Martin	Director	0	247,176	247,176	1.3%	10 Sep, 2024
9	Arjun Jj Desai	Director	247,127	0	247,127	1.3%	12 Dec, 2024
10	Bryan F. Cox	Chief Of Research	162,805	0	162,805	0.9%	07 Oct, 2026
11	Mats Wahlstrom	Director	147,555	0	147,555	0.8%	18 May, 2026
12	Richard Marshak	Chief Commercial Officer	127,994	0	127,994	0.7%	07 Oct, 2026
13	Sean Murphy	Chief Manuf, Strategybus Dev.	123,989	0	123,989	0.7%	21 May, 2025
14	Jennifer Stevens	Chief Regulatory Officer	123,794	0	123,794	0.7%	07 Oct, 2026
15	Jodi Devlin	Chief Of Clinical Operations	97,364	0	97,364	0.5%	20 Mar, 2026
16	Richard Henry Marshall	Chief Medical Officer	90,000	0	90,000	0.5%	29 Jun, 2026
17	William Valle	Director	83,241	0	83,241	0.4%	15 May, 2026
18	Gary B. Gordon	Director	72,510	0	72,510	0.4%	18 May, 2026
19	Steven C Katz	Chief Medical Officer	68,587	0	68,587	0.4%	14 Feb, 2024
20	James Emmett Young	Chief Financial Officer	49,663	0	49,663	0.3%	21 May, 2025
21	Financial Llc Magnetar	TenPercentOwner	0	16,668	16,668	0.1%	14 Jun, 2023
22	Liselotte Hyveled	Director	10,040	0	10,040	0.1%	06 Jan, 2025

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

197 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
05 Oct, 2026	Richard Marshak	Chief Commercial Officer	Disposed S	325	$4.39	$1.43K	127,994	Direct
05 Oct, 2026	Jennifer Stevens	Chief Regulatory Officer	Disposed S	316	$4.39	$1.39K	123,794	Direct
05 Oct, 2026	Mary T Szela	Ceo And President	Disposed F	2,693	$4.38	$11.80K	1,074,990	Direct
05 Oct, 2026	Bryan F. Cox	Chief Of Research	Disposed S	296	$4.39	$1.30K	162,805	Direct
01 Jul, 2026	David Patience	Chief Financial Officer	Disposed F	14,650	$4.46	$65.34K	261,107	Direct
30 Jun, 2026	Mary T Szela	Ceo And President	Acquired A	3,990	$3.87	$15.44K	1,077,683	Direct
30 Jun, 2026	Richard Marshak	Chief Commercial Officer	Acquired A	561	$3.87	$2.17K	128,319	Direct
29 Jun, 2026	Richard Henry Marshall	Chief Medical Officer	Acquired A	60,000	$0.00	$0	90,000	Direct
29 Jun, 2026	Richard Henry Marshall	Chief Medical Officer	Acquired A	120,000	$0.00	$0	253,000	Direct
15 May, 2026	Richard Marshak	Chief Commercial Officer	Disposed S	543	$2.67	$1.45K	125,101	Direct
15 May, 2026	Mats Wahlstrom	Director	Acquired P	60,000	$2.53	$151.80K	147,555	Direct
15 May, 2026	Michael P Stansky	Director	Acquired P	410,000	$2.50	$1.03Mn	1,240,722	Direct
15 May, 2026	Mary T Szela	Ceo And President	Acquired P	39,682	$2.59	$102.78K	1,065,215	Direct
15 May, 2026	Gary B. Gordon	Director	Acquired P	10,000	$2.46	$24.60K	72,510	Direct
15 May, 2026	David Patience	Chief Financial Officer	Acquired P	7,100	$2.43	$17.25K	275,757	Direct
15 May, 2026	Michael P Stansky	Director	Acquired P	200,000	$2.50	$500.00K	399,698	Indirect
14 May, 2026	Mats Wahlstrom	Director	Acquired A	37,602	$0.00	$0	53,329	Direct
14 May, 2026	Kerry R Hicks	Director	Acquired A	28,201	$0.00	$0	542,790	Direct
14 May, 2026	Gary B. Gordon	Director	Acquired A	28,201	$0.00	$0	37,957	Direct
14 May, 2026	Michael P Stansky	Director	Acquired A	23,501	$0.00	$0	810,633	Direct

Showing 1 to 20 of 197 transactions