QSI Quantum-Si incorporated

bearish · high conviction track record → $0.98 -0.03 (-3.3%)
Get emailed when QSI changes direction
Mkt Cap $219M 52wk $0.69 - $3.10 Earnings 2026-05-07 48d ago
Insider selling: $12,266,071 sold by 9 insiders (30d)
Est. revisions: +9.1% (1 up, 0 down in 30d)
Backed by structured data (insider trades, analyst ratings, or filings)
Factor Model (net +2.4)

Factor Model

net +2.4 5.1 / 10
Est. Revisions
+0.5
Insider Activity
+0.0
Momentum
+0.0
Analyst Rev.
+1.0
Narrative Gap
+0.5

Revenue guidance 86% below Street expectations

Watch: Watch for commentary on Proteus order pipeline and whether the company can accelerate commercialization. If Q1 revenue doesn't show traction, the $1 million full-year guide could be at risk.

Quantum-Si posted Q4 revenue of just $451,000 — 41% below the $762,000 estimate — and set fiscal 2026 guidance at $1 million. The Street had expected $7.15 million. The company did beat on EPS with a loss of $0.08 versus an estimated $0.12 loss. Shares dropped 4.51% to $0.90 in after-hours trading on March 3. The company priced its Proteus prototype system at $425,000.

The revenue guidance is catastrophic — the company will deliver 86% less than analysts anticipated. Even with a new product priced at $425,000, QSI is projecting minimal sales, signaling either production constraints or weak demand for its protein sequencing tech.

Evidence

9d ago Insider buy by LAPOINTE CHRISTIAN (QSI): $21,610
9d ago Insider buy by KEYES JEFFRY R (QSI): $43,465
9d ago Insider buy by HAWKINS JEFFREY ALAN (QSI): $21,272
9d ago Insider buy by KUMMETH CHARLES R (QSI): $148,459
9d ago Insider sell by ROTHBERG JONATHAN M (QSI): $11,716,735
9d ago Insider buy by KUMMETH CHARLES R (QSI): $459,800
9d ago Insider buy by DOWDY PAULA (QSI): $104,450
48d ago Quantum-Si Shares Slip After Q4 Revenue Miss benzinga
Fundamentals & Data ▾
Quantum-Si incorporated Healthcare · Medical Devices
Mkt Cap
$219M
Beta
3.09
52w Range
$0.69 - $3.10
Short Interest
22.1M 12.59%
Days to Cover
6.2 +5%
Technicals downtrend
from 52w Hi
-8.7%
1w return
+16.2%
Insiders
selling 5B / 9S
EPS Estimate
$-0.10 +9.1% 30d 1up / 0dn
Est. Dispersion
0% 1 analysts
Analyst Target
$2 $1 - $4
Options P/C
0.34
Insider Cluster
strong buy 5B / 6S (officer)
Top Holders
Citadel $4M
Recent Filings & Data
insider trade 42
net selling · $12,266,071 sold · $799,056 bought
9 insiders · 42 transactions (30d)
Recent transactions
HAWKINS JEFFREY ALAN · sell · $19,906
KEYES JEFFRY R · sell · $7,246
LAPOINTE CHRISTIAN · sell · $10,012
VIECELI JOHN S · sell · $18,416
HAWKINS JEFFREY ALAN · award
KEYES JEFFRY R · award
LAPOINTE CHRISTIAN · award
VIECELI JOHN S · award
KUMMETH CHARLES R · buy · $459,800
DOWDY PAULA · buy · $104,450
HAWKINS JEFFREY ALAN · sell · $30,250
KEYES JEFFRY R · sell · $11,008
LAPOINTE CHRISTIAN · sell · $15,249
VIECELI JOHN S · sell · $27,979
ROTHBERG JONATHAN M · sell · $66,281
HAWKINS JEFFREY ALAN · sell · $35,309
KEYES JEFFRY R · sell · $12,849
BENNETT TODD C · sell · $61,316
LAPOINTE CHRISTIAN · sell · $17,796
VIECELI JOHN S · sell · $32,655
HAWKINS JEFFREY ALAN · sell · $38,257
KEYES JEFFRY R · sell · $13,918
LAPOINTE CHRISTIAN · sell · $19,280
VIECELI JOHN S · sell · $35,382
HAWKINS JEFFREY ALAN · sell · $32,846
KEYES JEFFRY R · sell · $11,951
LAPOINTE CHRISTIAN · sell · $6,783
VIECELI JOHN S · sell · $5,981
HAWKINS JEFFREY ALAN · award
KEYES JEFFRY R · award
BENNETT TODD C · award
LAPOINTE CHRISTIAN · award
VIECELI JOHN S · award
ROTHBERG JONATHAN M · sell · $11,716,735
VIECELI JOHN S · sell · $5,570
VIECELI JOHN S · sell · $4,044
BENNETT TODD C · award
KUMMETH CHARLES R · buy · $148,459
HAWKINS JEFFREY ALAN · buy · $21,272
KEYES JEFFRY R · buy · $43,465
LAPOINTE CHRISTIAN · buy · $21,610
JOHNSTON GRACE · sell · $9,052
8 signals · latest 9d ago

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