QTRX Quanterix Corp
Executive Summary
QTRX saw a strong institutional accumulation cluster in 2026-Q1, with 14 net buyers adding $3.1M across active quant and asset-manager funds (RenTech doubled its stake, Marshall Wace added $1.2M, Russell Investments added $631K), against 5 sellers led by Ameriprise Financial and Morgan Stanley trimming $23.2M. The cluster is dominated by active managers (not passive), includes a quant doubling its stake (RenTech +1,054%), and is corroborated by a single open-market insider buy from C-suite — suggesting conviction in a turnaround thesis despite sell-side consensus being heavily bearish (7 Hold/3 Sell/0 Buy).
Key Financial Metrics
Institutional Positions
Net institutional flow: -$14.7M
▲ Buyers (14)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| RenTech | DOUBLED | +1054.3% | $479.0K | $404.0K |
| Marshall Wace | DOUBLED | +301.1% | $2.2M | $1.2M |
| Russell Investments Group | DOUBLED | +150.6% | $2.3M | $631.0K |
| Envestnet Asset Management | DOUBLED | +170.7% | $2.4M | $799.0K |
| Tudor Investment Corp | ADD | +86.2% | $1.1M | $33.0K |
▼ Sellers (5)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| Ameriprise Financial | TRIM | -29.1% | $31.8M | -$19.3M |
| Morgan Stanley | TRIM | -26.1% | $5.2M | -$3.1M |
| Los Angeles Capital Management | NEAR_EXIT | -99.3% | $175.0K | -$174.1K |
Actionable Insight
The 14-buyer active-manager cluster, including a quant doubling its stake, signals accumulating conviction despite near-term bearish consensus. Monitor for follow-on Form 4 filings from insiders to confirm alignment. A Q2 earnings beat or updated guidance could trigger a squeeze on the heavily short/negative consensus.
Key Facts
- 14 institutional buyers added positions totaling $3.1M in Q1; 5 sellers trimmed $23.2M
- RenTech (quant) more than doubled its stake (+1,054% to $479K)
- Marshall Wace (active) added $1.2M (+301%), Russell Investments added $631K (+151%)
- Ameriprise Financial reduced by $19.3M (-29.1%), Morgan Stanley by $3.1M (-26.1%)
- Insider corroboration score 62/100 — one C-suite open-market buy of $10K
- Top holders: Ameriprise $12M (trimming), BlackRock $12M, William Blair $7M
Financial Impact
Net institutional inflow of ~$3.1M across 14 buyers vs $23.2M outflow from 5 sellers; aggregate net is a reduction, but the buyer count (14 vs 5) and conviction levels (doubled positions, quant activity) suggest a shift in ownership composition toward long-term/specialist holders.
Risk Factors
- Sell-side consensus is overwhelmingly bearish (0 strong buy, 8 hold/sell) — the cluster may be contrarian and early
- 13F data is 45-60 days stale; the positions may have been unwound since quarter-end
- Signal is 'conviction' but only $10K in insider buying — not heavy insider alignment
Market Snapshot
Documents Analyzed
This report is based on 1 institutional 13F filing from SEC EDGAR.
| Document | Accession Number |
|---|---|
| INST-CLUSTER Data (Synthetic) | inst-cluster-QTRX-2026-Q1 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
|
Jun 17, 2026
4d ago
|
Institutional Cluster
| $2.88 $3.39 | ▲ +17.71% | ▲ +16.93% | — |
|
Jun 9, 2026
11d ago
|
8-K
| $3.09 $3.07 | ▼ −0.65% | ▲ +0.93% | — |
|
May 26, 2026
25d ago
|
8-K
| $2.65 $3.05 | ▲ +15.09% | ▲ +14.54% | — |
|
May 8, 2026
6w ago
|
DEFA14A
| $2.80 $2.80 | · 0.00% | ▲ +0.14% | — |
US Market Status
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