Bio-Rad Laboratories, Inc.
Bio-Rad Laboratories, Inc. (BIO) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · BIO · as of Mar 31, 2025
Ownership Breakdown
440
Institutional Holders
▼ 24 vs Q4
$4.72B
Total Inst. Value
▼ $1.49B vs Q4
27.04M
Shares Outstanding
freeFloat 66.27%
19.49M
13F Shares Held
▼ 380,678 vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
BIO largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. laboratory analytical instruments | 2.02M | 7.24% | 7.24% | $492.41B | May 2, 2025 | ▲ 10.1K |
VANGUARD GROUP INC laboratory analytical instruments | 1.91M | 6.84% | 6.84% | $465.72B | May 9, 2025 | ▼ 7.7K |
FIRST EAGLE INVESTMENT MANAGEMENT, LLC laboratory analytical instruments | 1.57M | 5.61% | 5.61% | $381.46B | May 12, 2025 | ▲ 852.7K |
VERITAS ASSET MANAGEMENT LLP laboratory analytical instruments | 913.1K | 3.27% | 3.27% | $222.40B | May 15, 2025 | ▼ 63.7K |
DIMENSIONAL FUND ADVISORS LP laboratory analytical instruments | 877.0K | 3.14% | 3.14% | $213.61B | May 13, 2025 | ▲ 130.9K |
ARIEL INVESTMENTS, LLC laboratory analytical instruments | 724.7K | 2.59% | 2.59% | $176.50B | May 15, 2025 | ▲ 164.1K |
STATE STREET CORP laboratory analytical instruments | 694.5K | 2.49% | 2.49% | $169.16B | May 15, 2025 | ▲ 4.4K |
EARNEST PARTNERS LLC laboratory analytical instruments | 599.6K | 2.15% | 2.15% | $146.04B | May 14, 2025 | ▼ 18.4K |
VAN ECK ASSOCIATES CORP laboratory analytical instruments | 596.7K | 2.14% | 2.14% | $145.34B | May 15, 2025 | ▼ 126.7K |
BANK OF AMERICA CORP /DE/ laboratory analytical instruments | 430.5K | 1.54% | 1.54% | $104.86B | May 15, 2025 | ▲ 3.2K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
29
Increased
+2.08M shares1
New Positions
first time holders20
Decreased
−801.6K shares0
Sold Out
fully exitedNet shares change (top 50)
+1.28M
+2.08M / −801.6K
Net new holders
+10
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
BIO insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
10
Buy transactions
9
Sell transactions
1.11
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
ENGELHARDT EVA ANETTE EVP, President, CDG | May 11, 2026 | Sale | 550 | $246.54 | $135.6K | 346 | Form 4 ↗ |
Lakkaraju Roop Kalyan EVP, Chief Financial Officer | Apr 24, 2026 | Tax Withhold | 420 | $287.84 | $120.9K | 2.6K | Form 4 ↗ |
ENLOE COURTNEY C EVP, General Counsel & Sec | Apr 24, 2026 | Tax Withhold | 77 | $287.84 | $22.2K | 749.777 | Form 4 ↗ |
Hinckley Greg K director | Apr 21, 2026 | Award | 369 | — | — | 369 | Form 4 ↗ |
PEI MELINDA LITHERLAND director | Apr 21, 2026 | Award | 369 | — | — | 369 | Form 4 ↗ |
EDWARDS JEFFREY L director | Apr 21, 2026 | Award | 369 | — | — | 369 | Form 4 ↗ |
PINKSTON ARNOLD A director | Apr 21, 2026 | Award | 369 | — | — | 369 | Form 4 ↗ |
BARRY JAMES EVP, President, LSG | Nov 6, 2025 | Sale | 699.873 | $306.18 | $214.3K | 509.682 | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Bio-Rad Laboratories, Inc. (BIO) is primarily owned by institutional investors, who hold approximately 72.1% of total shares outstanding. Company insiders own approximately 33.73%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Bio-Rad Laboratories, Inc. is BLACKROCK, INC., holding approximately 2.02 million shares — equal to 7.24% of outstanding shares — as of March 31, 2025.
A total of 440 institutional investors currently hold BIO stock, with a combined institutional value of approximately $4.72 billion as of the most recent 13F filing period.
Frequently asked questions
BIO ownershipBio-Rad Laboratories, Inc. (BIO) is primarily owned by institutional investors, who hold approximately 72.1% of shares. The largest shareholder is BLACKROCK, INC. with a 7.24% stake. Company insiders hold 33.73%. Data sourced from SEC Form 13F as of March 31, 2025.