Bio-Rad Laboratories BIO Insider Ownership

NYSE BIO

$360.50 +6.00 (+1.69%)

As of: Oct 21, 2026 · 3:59 PM EDT

Insider Holdings by Owner

3.16Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

3.26%

▼-9.77% pp QoQ

Shares Held by Insiders

872.76K

filed for Sep 2026

▼-74.96% QoQ

Shares Outstanding

26.75Mn

26,746,000 shares

Direct Holdings

859.75K

Indirect: 13.01K

Net Shares Traded (QoQ)

-2.61Mn

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

In the last 12 months, insiders at Bio-Rad Laboratories made open-market sales of $349,886 (1.25K shares) and bought no shares on the open market.

Bio-Rad Laboratories' open-market sales in the past 12 months came from 2 insiders; no insider bought.
James Barry (EVP, President, LSG) led open-market sales of Bio-Rad Laboratories stock over the past 12 months with $214,289 (700 shares), most recently on November 6, 2025.
The newest open-market trade among Bio-Rad Laboratories insiders came on May 11, 2026, when Eva Anette Engelhardt (EVP, President, CDG) made a sale of 550 shares for $135,597.
Away from the open market, BIO insiders acquired 28.97K shares through option exercises and conversions and gave up 14.48K shares to cover taxes or exercise prices over the last 12 months.
Business Quant data shows Bio-Rad Laboratories insiders holding 872.76K shares in total in their latest Form 4 filings.
By type of ownership, BIO insiders hold 98.51% of their shares directly (859.75K shares) and 1.49% indirectly (13.01K shares).
BIO's insider total is spread across 15 insiders who have filed a Form 4 in the past two years.
BIO's three largest insider shareholders, per their latest Form 4 filings, are Norman D. Schwartz (Chairman & CEO, 823.49K shares), Colleen Corey (EVP, Global Human Resources, 19.55K shares) and Michael Crowley (EVP, GBL Commercial Operations, 8.17K shares).
Of the shares held by BIO insiders, 94.35% belong to Norman D. Schwartz.
Institutional holders reported 89.54% of Bio-Rad Laboratories' outstanding shares for Q2 2026; insiders' latest Form 4 filings put their stake at about 3.26%, and other investors, including the public, hold the remaining 7.20%.
In the past year, 13 insiders of Bio-Rad Laboratories submitted 23 Form 4 filings reporting trades, awards or other transactions.
These insider figures for Bio-Rad Laboratories are based on Form 4 filings through September 9, 2026.

Form 4 Holdings

Insiders Holding BIO

Insiders 24

Shares held 3.16Mn

Of outstanding 11.83%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Alice N Schwartz	TenPercentOwner, Other	0	2,218,866	2,218,866	70.1%	27 Aug, 2024
2	Norman D Schwartz	Chairman Ceo	810,485	13,006	823,491	26.0%	09 Sep, 2026
3	Steven D Schwartz	TenPercentOwner	25,234	13,006	38,240	1.2%	28 Aug, 2024
4	Colleen Corey	Evp, Global Human Resources	19,550	0	19,550	0.6%	08 Sep, 2025
5	Diane Dahowski	Evp, Global Supply Chain	11,880	0	11,880	0.4%	05 Sep, 2023
6	Michael Crowley	Evp, Gbl Commercial Operations	8,171	0	8,171	0.3%	17 Mar, 2025
7	Andrew J. Last	Evp, Chief Operating Officer	7,559	0	7,559	0.2%	09 Sep, 2024
8	Schwartz Allison	Director	5,730	0	5,730	0.2%	08 Sep, 2026
9	Roop Kalyan Lakkaraju	Evp, Chief Financial Officer	4,151	0	4,151	0.1%	09 Sep, 2026
10	Sedat Evran	Evp, Global Supply Chain	3,603	0	3,603	0.1%	06 Sep, 2026
11	Timothy S Ernst	Evp, General Counsel Sec	3,397	0	3,397	0.1%	29 Feb, 2024
12	Simon May	Evp, President, Lsg	3,105	0	3,105	0.1%	05 Sep, 2023
13	Ilan Daskal	Evp, Chief Financial Officer	2,486	0	2,486	0.1%	04 Sep, 2023
14	James Barry	Evp, President, Lsg	2,025	0	2,025	0.1%	09 Sep, 2026
15	Jonathan P. Divincenzo	President Coo	1,963	0	1,963	0.1%	09 Sep, 2026
16	Eva Anette Engelhardt	Evp, President, Cdg	1,828	0	1,828	0.1%	09 Sep, 2026
17	Dara Wright	Evp, President, Cdg	1,827	0	1,827	0.1%	18 Dec, 2023
18	Courtney C Enloe	Evp, General Counsel Sec	1,652	0	1,652	0.1%	09 Sep, 2026
19	Rajat Mehta	Evp, Gbl Commercial Operations	1,232	0	1,232	0.0%	09 Sep, 2026
20	Greg K Hinckley	Director	1,215	0	1,215	0.0%	23 Apr, 2026
21	Melinda Litherland Pei	Director	715	0	715	0.0%	23 Apr, 2026
22	Arnold A Pinkston	Director	715	0	715	0.0%	23 Apr, 2026
23	Jeffrey L Edwards	Director	715	0	715	0.0%	23 Apr, 2026
24	Ajit Ramalingam	Svp, Chief Accounting Officer	403	0	403	0.0%	05 Sep, 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

2,656 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
05 Sep, 2026	Jonathan P. Divincenzo	President Coo	Acquired M	1,712	$0.00	$0	2,631	Direct
05 Sep, 2026	Roop Kalyan Lakkaraju	Evp, Chief Financial Officer	Acquired M	1,370	$0.00	$0	3,956	Direct
05 Sep, 2026	James Barry	Evp, President, Lsg	Acquired M	1,027	$0.00	$0	1,808	Direct
05 Sep, 2026	Eva Anette Engelhardt	Evp, President, Cdg	Acquired M	1,027	$0.00	$0	1,530	Direct
05 Sep, 2026	Norman D Schwartz	Chairman Ceo	Acquired M	4,109	$0.00	$0	450,294	Direct
05 Sep, 2026	Rajat Mehta	Evp, Gbl Commercial Operations	Acquired M	456	$0.00	$0	599	Direct
05 Sep, 2026	Courtney C Enloe	Evp, General Counsel Sec	Acquired M	685	$0.00	$0	1,435	Direct
05 Sep, 2026	Roop Kalyan Lakkaraju	Evp, Chief Financial Officer	Disposed F	559	$386.11	$215.84K	3,397	Direct
05 Sep, 2026	Courtney C Enloe	Evp, General Counsel Sec	Disposed F	246	$386.11	$94.98K	1,189	Direct
05 Sep, 2026	Eva Anette Engelhardt	Evp, President, Cdg	Disposed F	369	$386.11	$142.47K	1,161	Direct
05 Sep, 2026	Jonathan P. Divincenzo	President Coo	Disposed F	668	$386.11	$257.92K	1,963	Direct
05 Sep, 2026	Norman D Schwartz	Chairman Ceo	Disposed F	2,876	$386.11	$1.11Mn	447,418	Direct
05 Sep, 2026	Rajat Mehta	Evp, Gbl Commercial Operations	Disposed F	233	$386.11	$89.96K	366	Direct
05 Sep, 2026	James Barry	Evp, President, Lsg	Disposed F	369	$386.11	$142.47K	1,439	Direct
04 Sep, 2026	Jonathan P. Divincenzo	President Coo	Acquired A	6,326	$0.00	$0	6,326	Direct
06 Sep, 2026	James Barry	Evp, President, Lsg	Acquired M	1,056	$0.00	$0	2,495	Direct
06 Sep, 2026	Roop Kalyan Lakkaraju	Evp, Chief Financial Officer	Acquired M	1,536	$0.00	$0	4,933	Direct
05 Sep, 2026	Rajat Mehta	Evp, Gbl Commercial Operations	Acquired M	1,370	$0.00	$0	1,736	Direct
06 Sep, 2026	Norman D Schwartz	Chairman Ceo	Acquired M	3,455	$0.00	$0	450,873	Direct
06 Sep, 2026	Eva Anette Engelhardt	Evp, President, Cdg	Acquired M	1,152	$0.00	$0	2,313	Direct

Showing 1 to 20 of 2,656 transactions