Security key
74766Q101
Quanterix Corp - Common Stock, $0.001 par value per share (QTRX)
CUSIP: 74766Q101
Q3 2019 13F Holders as of 30 Sep 2019
- Security type / class
- Equity / Common Stock, $0.001 par value per share
- Total 13F shares
- 18,912,293
- Total 13F value
- $415,310,210
- Share change
- +5,454,409
- SEC-reported price per share
- $21.96
- Number of holders
- 86
- Value change
- +$116,253,289
- Number of buys
- 62
- Number of sells
- 25
- Shares outstanding
- 47,133,168
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2019
Institutions
86
Top holders
10
QTRX full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2026
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 reported holders 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.
Comparable stake leader
GILDER GAGNON HOWE & CO LLC
Disclosed value leader
GILDER GAGNON HOWE & CO LLC
Comparable rows
15/15
Latest evidence
30 Jun 2019
13F
Lead comparable stake: 6.5%
Showing 1-6 of 15 holder rows.
Quick read
GILDER GAGNON HOWE & CO LLC leads the comparable SEC ownership view at 6.5%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens GILDER GAGNON HOWE & CO LLC's linked filing trail.
Comparable ownership
Top 5
GILDER GAGNON HOWE & CO LLC
6.5%
BAIN CAPITAL VENTURE INVESTORS, LLC
4.5%
Flagship Pioneering, LLC
3.9%
PRICE T ROWE ASSOCIATES INC /MD/
2.2%
BlackRock Finance, Inc.
1.9%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| GILDER GAGNON HOWE & CO LLC |
13F
Company
|
6.5%
|
$103,673,000
3,068,168 shares
|
— | 30 Jun 2019 |
| BAIN CAPITAL VENTURE INVESTORS, LLC |
13F
Company
|
4.5%
|
$72,178,000
2,136,084 shares
|
— | 30 Jun 2019 |
| Flagship Pioneering, LLC |
13F
Company
|
3.9%
|
$61,681
1,825,412 shares
|
— | 30 Jun 2019 |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
Company
|
2.2%
|
$34,832,000
1,030,830 shares
|
— | 30 Jun 2019 |
| BlackRock Finance, Inc. |
13F
Company
|
1.9%
|
$29,636,000
877,059 shares
|
— | 30 Jun 2019 |
| FMR LLC |
13F
Company
|
1.4%
|
$22,731,000
672,723 shares
|
— | 30 Jun 2019 |
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 2019
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
86
Shares
18,912,293
Rows available
86
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-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. The marker flags a reported price that did not pass the local price check.
Compare Q3 2019 vs Q2 2019 Across Filers
Q2 2019 holders
86
Q3 2019 holders
86
Holder diff
0
| Investor | Q2 2019 Shares | Q3 2019 Shares | Share Diff | Share Chg % | Q2 2019 value | Q3 2019 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend