Vaxart VXRT Insider Ownership

OTC VXRT

$0.48 -0.01 (-1.94%)

As of: Oct 21, 2026 · 12:16 PM EDT

Insider Holdings by Owner

8.28Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

3.19%

▲+0.068% pp QoQ

Shares Held by Insiders

7.74Mn

filed for Sep 2026

▲+2.19% QoQ

Shares Outstanding

242.84Mn

242,835,358 shares

Direct Holdings

7.58Mn

Indirect: 160.53K

Net Shares Traded (QoQ)

+165.92K

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 5, 2026

Over the trailing 12 months, VXRT insiders bought $30,636 worth of shares (70K shares) in open-market trades, with no open-market sales.

Vaxart's open-market purchases in the past 12 months came from 2 insiders; no insider sold.
Among Vaxart insiders, Elaine J. Heron (Director) led open-market buying over the past 12 months with $15,921 of purchases (40K shares); the latest was on November 17, 2025.
W. Mark Watson (Director) made the most recent open-market trade by an insider of Vaxart, a purchase of 10K shares for $6,530 on May 22, 2026.
Away from the open market, VXRT insiders received 1.59Mn shares in stock awards and gave up 340.26K shares to cover taxes or exercise prices over the last 12 months.
According to Business Quant data, insiders at Vaxart reported 7.74Mn shares in total in their latest Form 4 filings, up 2.19% from 7.57Mn shares at the end of Q2 2026 and up 26.70% from 6.11Mn shares at the end of Q3 2025.
Of the 7.74Mn shares held by Vaxart insiders, 7.58Mn shares (97.93%) are held directly and 160.53K shares (2.07%) indirectly, through trusts, partnerships, family members and other entities.
VXRT's insider total is spread across 12 insiders who have filed a Form 4 in the past two years.
Vaxart's top three insider holders by shares held are Steven Lo (President, Chief Executive Officer, 2.59Mn shares), Sean Tucker (SVP, Chief Scientific Officer, 943.34K shares) and James F. Cummings (Chief Medical Officer, 924.18K shares).
Steven Lo alone accounts for 33.42% of the shares held by Vaxart insiders.
Institutions held 0.03% of Vaxart's outstanding shares in their Q2 2026 13F filings, insiders about 3.19% based on their latest Form 4 filings, and other investors, including the public, the remaining 96.78%.
A total of 26 Form 4 filings with transactions in Vaxart stock were made over the past 12 months, by 9 insiders.
These insider figures for Vaxart are based on Form 4 filings through July 20, 2026.

Form 4 Holdings

Insiders Holding VXRT

Insiders 18

Shares held 8.28Mn

Of outstanding 3.41%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	Steven Lo	President, Chief Exec Officer	2,485,606	2,485,606	30.0%	26 Mar, 2026
2	James F. Cummings	Chief Medical Officer	924,177	924,177	11.2%	31 Mar, 2026
3	Sean Tucker	Svp, Chief Scientific Officer	882,811	882,811	10.7%	31 Mar, 2026
4	Edward B Berg	Svp, General Counsel	755,368	755,368	9.1%	26 Mar, 2026
5	Michael J. Finney	Director	702,840	702,840	8.5%	16 Jun, 2025
6	Phillip E Lee	Chief Financial Officer	631,619	631,619	7.6%	26 Mar, 2025
7	Jeroen Nicolaas Grasman	Chief Financial Officer	545,605	545,605	6.6%	21 May, 2026
8	Cezar Andrei Floroiu	President, Chief Exec Officer	452,735	452,735	5.5%	21 Mar, 2023
9	Kevin Finney	Director	244,171	244,171	2.9%	20 Jul, 2026
10	W. Mark Watson	Director	173,525	173,525	2.1%	17 Jul, 2026
11	Todd C Davis	Director	125,905	125,905	1.5%	08 Aug, 2022
12	Elaine J Heron	Director	96,566	96,566	1.2%	19 Nov, 2025
13	James B Breitmeyer	Director	87,115	87,115	1.1%	17 Jul, 2026
14	Raquel C. Bono	Director	78,800	78,800	1.0%	20 Oct, 2026
15	David E. Wheadon	Director	46,750	46,750	0.6%	16 Jun, 2025
16	Robert A. Yedid	Director	34,490	34,490	0.4%	12 Jun, 2024
17	Julie M Cherrington	Director	6,217	6,217	0.1%	08 Aug, 2022
18	Fuad Ahmad	Interim Cfo	5,000	5,000	0.1%	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

708 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
16 Oct, 2026	Raquel C. Bono	Director	Acquired A	78,800	$0.00	$0	78,800	Direct
16 Oct, 2026	Raquel C. Bono	Director	Acquired A	157,400	$0.00	$0	157,400	Direct
16 Jul, 2026	Kevin Finney	Director	Acquired A	39,400	$0.00	$0	244,171	Direct
16 Jul, 2026	Kevin Finney	Director	Acquired A	78,700	$0.00	$0	78,700	Direct
16 Jul, 2026	W. Mark Watson	Director	Acquired A	39,400	$0.00	$0	173,525	Direct
16 Jul, 2026	James B Breitmeyer	Director	Acquired A	8,315	$0.00	$0	87,115	Direct
16 Jul, 2026	James B Breitmeyer	Director	Acquired A	16,610	$0.00	$0	16,610	Direct
16 Jul, 2026	W. Mark Watson	Director	Acquired A	78,700	$0.00	$0	78,700	Direct
22 May, 2026	W. Mark Watson	Director	Acquired P	10,000	$0.65	$6.53K	134,125	Direct
19 May, 2026	Jeroen Nicolaas Grasman	Chief Financial Officer	Disposed F	31,395	$0.61	$19.15K	545,605	Direct
28 Mar, 2026	Sean Tucker	Svp, Chief Scientific Officer	Disposed F	3,924	$0.65	$2.55K	882,811	Direct
28 Mar, 2026	James F. Cummings	Chief Medical Officer	Disposed F	3,292	$0.65	$2.14K	924,177	Direct
24 Mar, 2026	Steven Lo	President, Chief Exec Officer	Disposed F	126,028	$0.69	$87.46K	2,485,606	Direct
24 Mar, 2026	Edward B Berg	Svp, General Counsel	Disposed F	36,418	$0.69	$25.27K	755,368	Direct
24 Mar, 2026	James F. Cummings	Chief Medical Officer	Disposed F	30,551	$0.69	$21.20K	927,469	Direct
24 Mar, 2026	Sean Tucker	Svp, Chief Scientific Officer	Disposed F	36,418	$0.69	$25.27K	886,735	Direct
18 Mar, 2026	Edward B Berg	Svp, General Counsel	Disposed F	8,072	$0.63	$5.12K	791,786	Direct
18 Mar, 2026	Steven Lo	President, Chief Exec Officer	Disposed F	22,425	$0.63	$14.23K	2,611,634	Direct
18 Mar, 2026	James F. Cummings	Chief Medical Officer	Disposed F	6,772	$0.63	$4.30K	958,020	Direct
18 Mar, 2026	Sean Tucker	Svp, Chief Scientific Officer	Disposed F	8,072	$0.63	$5.12K	923,153	Direct

Showing 1 to 20 of 708 transactions