Security key
74766Q101
Quanterix Corp - Common Stock, $0.001 par value per share (QTRX)
CUSIP: 74766Q101
Q3 2025 13F Holders as of 30 Sep 2025
- Type / Class
- Equity / Common Stock, $0.001 par value per share
- Shares outstanding
- 47,133,168
- Total 13F shares
- 35,667,301
- Share change
- +910,065
- Total reported value
- $193,650,925
- Put/Call ratio
- 130%
- Price per share
- $5.43
- Number of holders
- 127
- Value change
- +$2,746,608
- Number of buys
- 65
- Number of sells
- 63
Report period
Q3 2025
Institutions
127
Top holders
10
QTRX full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q4 2025
Previous quarter: Q2 2025
Quanterix Corp SEC filings
Quanterix Corp company facts
Quanterix Corp 13D/G history
Broader feeds
Reporting periods
Holder history for CUSIP 74766Q101
Recent filing periods:
Ownership snapshot
Top shareholders of QTRX - Quanterix Corp - Common Stock, $0.001 par value per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Lead holder
BlackRock, Inc.
13D/G signal
BlackRock, Inc.
Evidence rows
50
Latest as of
30 Sep 2025
13F
13D/G
Lead comparable stake: 7.3%
13D/G row: BlackRock, Inc.
Showing first 8 of 50 holder rows.
Open remaining rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
7.3%
from 13D/G
|
$19,449,249
2,924,699 shares
|
— | 30 Jun 2025 |
| Telegraph Hill Partners III, L.P. |
13D/G
|
5.4%
|
$12,523,240
2,504,648 shares
|
$0 | 30 Sep 2025 |
| Kent Lake PR LLC |
13F
13D/G
Company
|
4.5%
from 13D/G
|
$15,301,650
2,301,000 shares
|
— | 30 Jun 2025 |
| ALLIANCEBERNSTEIN L.P. |
13F
13D/G
Company
|
0.1%
from 13D/G
|
$295,792
44,480 shares
|
— | 30 Jun 2025 |
| AMERIPRISE FINANCIAL INC |
13F
Company
|
9%
|
$28,175,232
4,236,877 shares
|
— | 30 Jun 2025 |
| Portolan Capital Management, LLC |
13F
Company
|
7.7%
|
$24,163,586
3,633,622 shares
|
— | 30 Jun 2025 |
| VANGUARD GROUP INC |
13F
Company
|
5.4%
|
$16,817,518
2,528,950 shares
|
— | 30 Jun 2025 |
| Invenomic Capital Management LP |
13F
Company
|
2.4%
|
$7,613,612
1,144,904 shares
|
— | 30 Jun 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q3 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
127
Shares
35,667,301
Rows loaded
127
| Investor | Option | Weight % | Change % | Reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* Reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. An asterisk next to the price means the price is likely invalid.
Compare Q3 2025 vs Q2 2025 Across Filers
Q2 2025 holders
135
Q3 2025 holders
127
Holder diff
-8
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 value | Q3 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend