Quanterix Corp: which funds bought and sold
Institutions that bought and sold Quanterix shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.
Between March 31, 2026 and June 30, 2026, 79 institutions that filed 13F reports for both quarters added to or opened positions in Quanterix, and 59 cut or closed them. Together they sold a net 4.8M shares, −13.4% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 492K shares (+5.2%); index fund managers were net buyers of 442K shares (+5.2%). 35 opened a new position and 29 sold out entirely.
Bought, Q2 2026 79 institutions, 35 of them new holders Sold, Q2 2026 59 institutions, 29 of them sold out
Net change, all compared −4.8M shares (−13.4%)
Net change, active managers +492K shares (+5.2%), 15 bought, 13 sold
Buyers versus sellers
79 bought 22 59 sold
Active managers and hedge funds 15 bought · 13 sold · +492K
Index fund managers 7 bought · 3 sold · +442K
Other institutions 57 bought · 43 sold · −5.7M
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| First Eagle Investment Management, LLC Active manager | +4.2M +323.5% | 5.5M | $23.8M |
| Blue Water Life Science Advisors, LP | +1.3M +62.2% | 3.5M | $15M |
| AQR Capital Management LLC Hedge fund | +1.3M +1496.3% | 1.3M | $5.8M |
| Jacobs Levy Equity Management, Inc Active manager | +488K New position | 488K | $2.1M |
| Blackrock, Inc. Index funds | +358K +10.9% | 3.6M | $15.7M |
| Marshall Wace, LLP Hedge fund | +351K +56.5% | 974K | $4.2M |
| Gsa Capital Partners LLP | +315K +329.5% | 410K | $1.8M |
| Jane Street Group, LLC | +263K +169.2% | 419K | $1.8M |
| Citadel Advisors LLC Hedge fund | +169K +276.6% | 230K | $992,460 |
| Nuveen, LLC | +161K +223.8% | 233K | $1M |
| Susquehanna Portfolio Strategies, LLC | +149K New position | 149K | $642,030 |
| Geode Capital Management, LLC Index funds | +137K +13.7% | 1.1M | $4.9M |
| Point72 Asset Management, L.P. Hedge fund | +132K +142.0% | 226K | $974,821 |
| Susquehanna International Group, LLP | +118K +232.5% | 169K | $728,439 |
| Xtx Topco Ltd | +116K +104.2% | 228K | $985,111 |
| Tudor Investment Corp Et Al Hedge fund | +84K +26.7% | 400K | $1.7M |
| Quadrature Capital Ltd Hedge fund | +80K New position | 80K | $346,464 |
| Cerity Partners LLC | +78K New position | 78K | $337,319 |
| Jain Global LLC Hedge fund | +57K New position | 57K | $247,618 |
| Algert Global LLC Hedge fund | +55K New position | 55K | $238,537 |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| First Eagle Investment Management, LLC Active manager | +4.2M +323.5% | 5.5M | $23.8M |
| AQR Capital Management LLC Hedge fund | +1.3M +1496.3% | 1.3M | $5.8M |
| Jacobs Levy Equity Management, Inc Active manager | +488K New position | 488K | $2.1M |
| Marshall Wace, LLP Hedge fund | +351K +56.5% | 974K | $4.2M |
| Citadel Advisors LLC Hedge fund | +169K +276.6% | 230K | $992,460 |
| Point72 Asset Management, L.P. Hedge fund | +132K +142.0% | 226K | $974,821 |
| Tudor Investment Corp Et Al Hedge fund | +84K +26.7% | 400K | $1.7M |
| Quadrature Capital Ltd Hedge fund | +80K New position | 80K | $346,464 |
| Jain Global LLC Hedge fund | +57K New position | 57K | $247,618 |
| Algert Global LLC Hedge fund | +55K New position | 55K | $238,537 |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Ameriprise Financial Inc | −2.6M −72.1% | 987K | $4.3M |
| William Blair Investment Management, LLC Active manager | −2.1M Sold out | 0 | — |
| Invenomic Capital Management LP Hedge fund | −1.9M Sold out | 0 | — |
| Levin Capital Strategies, L.P. Active manager | −1.5M Sold out | 0 | — |
| Portolan Capital Management, LLC | −1.0M −35.5% | 1.9M | $8.2M |
| Empire Financial Management Company, LLC | −736K Sold out | 0 | — |
| Envestnet Asset Management Inc | −683K Sold out | 0 | — |
| Millennium Management LLC Hedge fund | −649K −94.1% | 41K | $175,660 |
| Williams Jones Wealth Management, Llc. | −613K Sold out | 0 | — |
| Russell Investments Group, Ltd. | −604K −94.1% | 38K | $162,958 |
| Topline Capital Management, LLC | −563K Sold out | 0 | — |
| Pier Capital, LLC | −492K Sold out | 0 | — |
| Parkman Healthcare Partners LLC | −341K Sold out | 0 | — |
| Royal Bank Of Canada | −231K −99.4% | 1,475 | $7,000 |
| Morgan Stanley | −160K −26.3% | 448K | $1.9M |
| Renaissance Technologies LLC Hedge fund | −136K Sold out | 0 | — |
| UBS Group AG | −95K −25.2% | 282K | $1.2M |
| Brevan Howard Capital Management LP Hedge fund | −87K Sold out | 0 | — |
| Vanguard Portfolio Management LLC Index funds | −87K −15.1% | 490K | $2.1M |
| State Of Wisconsin Investment Board | −84K Sold out | 0 | — |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| William Blair Investment Management, LLC Active manager | −2.1M Sold out | 0 | — |
| Invenomic Capital Management LP Hedge fund | −1.9M Sold out | 0 | — |
| Levin Capital Strategies, L.P. Active manager | −1.5M Sold out | 0 | — |
| Millennium Management LLC Hedge fund | −649K −94.1% | 41K | $175,660 |
| Renaissance Technologies LLC Hedge fund | −136K Sold out | 0 | — |
| Brevan Howard Capital Management LP Hedge fund | −87K Sold out | 0 | — |
| PDT Partners, LLC Hedge fund | −48K Sold out | 0 | — |
| Two Sigma Investments, LP Hedge fund | −35K Sold out | 0 | — |
| Schonfeld Strategic Advisors LLC Hedge fund | −30K −70.4% | 13K | $54,702 |
| Intech Investment Management LLC Active manager | −12K Sold out | 0 | — |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Jacobs Levy Equity Management, IncActive manager | 488K | $2.1M |
| Susquehanna Portfolio Strategies, LLC | 149K | $642,030 |
| Quadrature Capital LtdHedge fund | 80K | $346,464 |
| Cerity Partners LLC | 78K | $337,319 |
| Jain Global LLCHedge fund | 57K | $247,618 |
| Algert Global LLCHedge fund | 55K | $238,537 |
| Susquehanna Fundamental Investments, LLC | 39K | $168,312 |
| Canada Pension Plan Investment Board | 38K | $164,592 |
| Ieq Capital, LLC | 36K | $153,390 |
| Aigen Investment Management, LP | 24K | $105,097 |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| William Blair Investment Management, LLCActive manager | 2.1M | $7.3M |
| Invenomic Capital Management LPHedge fund | 1.9M | $6.8M |
| Levin Capital Strategies, L.P.Active manager | 1.5M | $5.2M |
| Empire Financial Management Company, LLC | 736K | $2.6M |
| Envestnet Asset Management Inc | 683K | $2.4M |
| Williams Jones Wealth Management, Llc. | 613K | $2.2M |
| Topline Capital Management, LLC | 563K | $2M |
| Pier Capital, LLC | 492K | $1.7M |
| Parkman Healthcare Partners LLC | 341K | $1.2M |
| Renaissance Technologies LLCHedge fund | 136K | $479,449 |
Who holds the shares
- Institutions reporting
- 132
- Ten largest holders
- 69.1% of 13F-reported shares
- Index fund managers
- 27.9% of 13F-reported shares
- Active managers and hedge funds
- 31.0% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 15 | 13 | 6 | 9 | +492K | +5.2% |
| Index fund managers | 7 | 3 | 1 | 0 | +442K | +5.2% |
| Other institutions | 57 | 43 | 28 | 20 | −5.7M | −32.7% |