Portolan Capital Management, LLC
Position in BIO — Bio-Rad Laboratories, Inc.
CIK 1350290
BOSTON, MA
Position in BIO
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$3,950,723
-$6,399,112 QoQ
Shares Held
14,173
-58.5% QoQ
Ownership
0.053%
of shares outstanding
% of Portfolio
0.21%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in BIO Over Time
Shares Held
Position Value (USD)
Position in Medical Devices
Healthcare · as of Mar 31, 2026Portolan Capital Management, LLC holds $22,221,484 across 5 Medical Devices names. BIO ranks #3 (17.8% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | QTRX |
Quanterix Corp
|
2,945,823 | $10,369,296 | |
| 2 | PRCT |
PROCEPT BioRobotics Corp
|
251,716 | $6,295,417 | |
| 3 | BIO |
Bio-Rad Laboratories, Inc.
This page
|
14,173 | $3,950,723 | |
| 4 | TMDX |
TransMedics Group, Inc.
|
10,688 | $1,062,494 | |
| 5 | ESTA |
Establishment Labs Holdings Inc.
|
9,573 | $543,554 |
All Filings in BIO
Export CSV
25 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $3,950,723 | 14,173 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $10,349,835 | 34,159 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $13,021,311 | 46,440 | Shares | Sole | 2025-11-13 | |
| 2025-06-30 | $15,151,034 | 62,784 | Shares | Sole | 2025-08-13 | |
| 2025-03-31 | $5,294,994 | 21,740 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $10,047,806 | 30,586 | Shares | Sole | 2025-02-13 | |
| 2024-09-30 | $7,327,302 | 21,900 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $6,868,716 | 25,150 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $31,471,403 | 90,992 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $18,493,201 | 57,274 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $15,229,106 | 42,486 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $24,657,585 | 65,039 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $26,039,527 | 54,360 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $26,092,665 | 62,053 | Shares | Sole | 2023-02-13 | |
| 2022-09-30 | $18,740,848 | 44,927 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $20,771,190 | 41,962 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $19,320,478 | 34,303 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $14,900,595 | 19,721 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $18,606,230 | 24,943 | Shares | Sole | 2021-11-15 | |
| 2021-06-30 | $7,440,905 | 11,549 | Shares | Sole | 2021-08-16 | |
| 2021-03-31 | $6,904,302 | 12,088 | Shares | Sole | 2021-05-17 | |
| 2020-12-31 | $7,064,649 | 12,119 | Shares | Sole | 2021-02-16 | |
| 2020-09-30 | $9,204,569 | 17,857 | Shares | Sole | 2020-11-16 | |
| 2020-06-30 | $16,314,591 | 36,135 | Shares | Sole | 2020-08-14 | |
| 2020-03-31 | $23,016,367 | 65,656 | Shares | Sole | 2020-05-14 | |
| No filing history on record for this holder in this stock. | ||||||