Blaize Holdings BZAI Insider Ownership

NASDAQ BZAI

$0.25 +0.00 (+0.32%)

At close: Oct 19, 2026 · 4:00 PM EDT

Insider Holdings by Owner

41.76Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

21.29%

▲+1.46% pp QoQ

Shares Held by Insiders

28.70Mn

filed for Sep 2026

▲+7.38% QoQ

Shares Outstanding

134.81Mn

134,813,711 shares

Direct Holdings

2.13Mn

Indirect: 26.57Mn

Net Shares Traded (QoQ)

+1.97Mn

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

In the last 12 months, insiders at Blaize Holdings made open-market sales of $949,531 (495.29K shares) and bought no shares on the open market.

Counted by insider, open-market selling of BZAI stock in the past 12 months came from 3 insiders, with no insider buying.
Harminder Sehmi (Chief Financial Officer) sold the most Blaize Holdings stock on the open market over the past 12 months, $491,031 (245.29K shares), most recently on July 1, 2026.
Blaize Holdings' latest insider trade on the open market was a sale of 50K shares for $67,500 by Anthony Cannestra (Director) on July 6, 2026.
Away from the open market, BZAI insiders received 75.26K shares in stock awards, acquired 853.81K shares through option exercises and conversions and gave up 34.33K shares to cover taxes or exercise prices over the last 12 months.
Business Quant data shows Blaize Holdings insiders holding 28.7Mn shares in total in their latest Form 4 filings, up 7.38% from 26.73Mn shares at the end of Q2 2026.
Direct holdings account for 2.13Mn shares (7.42%) of BZAI's insider total, and indirect holdings through trusts, partnerships and family members for 26.57Mn shares (92.58%).
The insider holdings in Blaize Holdings belong to 10 insiders who have reported on Form 4 within the past two years.
BZAI's three largest insider shareholders, per their latest Form 4 filings, are Lane Bess (Director, 15.04Mn shares), Ava Investors SA (10% owner, 11.74Mn shares) and Dinakar Munagala (Chief Executive Officer, 501.42K shares).
Lane Bess alone accounts for 52.41% of the shares held by Blaize Holdings insiders.
Institutional investors held 27.80% of Blaize Holdings stock at the end of Q2 2026, while the latest Form 4 filings of its insiders account for about 21.29%; other investors, including the public, hold roughly 50.91%.
In the past year, 13 insiders of Blaize Holdings submitted 24 Form 4 filings reporting trades, awards or other transactions.
This summary of Blaize Holdings insider activity covers Form 4 filings through September 1, 2026.

Form 4 Holdings

Insiders Holding BZAI

Insiders 11

Shares held 41.76Mn

Of outstanding 30.98%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Lane Bess	Director	0	14,446,783	14,446,783	34.6%	09 Jul, 2026
2	Ventures Advisory, Llc Bess	TenPercentOwner	13,653,976	0	13,653,976	32.7%	12 May, 2026
3	Investors Sa Ava	TenPercentOwner	0	11,737,254	11,737,254	28.1%	02 Apr, 2026
4	Dinakar Munagala	Chief Executive Officer	501,422	0	501,422	1.2%	10 Jun, 2026
5	Juergen Hambrecht	Director	378,757	0	378,757	0.9%	05 Dec, 2025
6	Edward H. Frank	Director	378,757	0	378,757	0.9%	05 Dec, 2025
7	Harminder Sehmi	Chief Financial Officer	259,773	0	259,773	0.6%	06 Jul, 2026
8	Yoshiaki Fujimori	Director	169,619	0	169,619	0.4%	05 Dec, 2025
9	Urioste George De	Director	169,619	0	169,619	0.4%	05 Dec, 2025
10	Kimberly Peterson Evans	General Counsel	60,033	0	60,033	0.1%	01 Sep, 2026
11	Stephen Paul Patak	Chief Revenue Officer	6,282	0	6,282	0.0%	13 Oct, 2026

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

82 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
12 Oct, 2026	Stephen Paul Patak	Chief Revenue Officer	Acquired M	2,500	$0.00	$0	6,891	Direct
12 Oct, 2026	Stephen Paul Patak	Chief Revenue Officer	Disposed F	609	$0.29	$177	6,282	Direct
12 Oct, 2026	Stephen Paul Patak	Chief Revenue Officer	Disposed M	2,500	$0.00	$0	12,500	Direct
01 Sep, 2026	Kimberly Peterson Evans	General Counsel	Acquired M	18,750	$0.00	$0	66,761	Direct
01 Sep, 2026	Kimberly Peterson Evans	General Counsel	Disposed F	6,728	$0.49	$3.30K	60,033	Direct
01 Sep, 2026	Kimberly Peterson Evans	General Counsel	Disposed M	18,750	$0.00	$0	206,250	Direct
13 Aug, 2026	Kurt J Lauk	Director	Acquired A	618,556	$0.00	$0	618,556	Direct
12 Jul, 2026	Stephen Paul Patak	Chief Revenue Officer	Acquired M	2,500	$0.00	$0	5,000	Direct
12 Jul, 2026	Stephen Paul Patak	Chief Revenue Officer	Disposed F	609	$1.23	$749	4,391	Direct
12 Jul, 2026	Stephen Paul Patak	Chief Revenue Officer	Disposed M	2,500	$0.00	$0	15,000	Direct
07 Jul, 2026	Lane Bess	Director	Acquired J	2,000,000	$0.00	$0	14,446,783	Indirect
06 Jul, 2026	Anthony Cannestra	Director	Acquired M	50,000	$0.57	$28.50K	50,000	Direct
06 Jul, 2026	Anthony Cannestra	Director	Disposed S	50,000	$1.35	$67.50K	0	Direct
06 Jul, 2026	Anthony Cannestra	Director	Disposed M	50,000	—	—	12,169	Direct
01 Jul, 2026	Harminder Sehmi	Chief Financial Officer	Disposed S	40,609	$1.37	$55.63K	259,773	Direct
08 Jun, 2026	Anthony Cannestra	Director	Acquired M	50,000	$0.57	$28.50K	50,000	Direct
17 Apr, 2026	Dinakar Munagala	Chief Executive Officer	Disposed S	50,000	$2.54	$127.00K	501,422	Direct
08 Jun, 2026	Anthony Cannestra	Director	Disposed S	50,000	$1.68	$84.00K	0	Direct
08 Jun, 2026	Anthony Cannestra	Director	Disposed M	50,000	—	—	62,169	Direct
01 Jun, 2026	Harminder Sehmi	Chief Financial Officer	Disposed S	40,609	$1.82	$73.91K	300,382	Direct

Showing 1 to 20 of 82 transactions