Daily trading records

Quantum-Si Historical Stock Prices by Trading Day

Direct answer

Review 60 recent trading days for Quantum-Si.

The verified trading-day record runs from July 2, 2026 through September 25, 2026.
Select a date to review its open, high, low, close, volume and change from the prior session.
Daily aggregate prices are provided by Polygon.

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Review Quantum-Si's price trend and period performance.

The chart connects verified session closes from July 1, 2026 through September 25, 2026.

Closing-price trend by trading session

Period performance is calculated from verified trading sessions.

5-session performance

+11.97%

From the September 18, 2026 close of $0.7451 to $0.8343 on September 25, 2026.

20-session performance

+3.88%

From the August 27, 2026 close of $0.8031 to $0.8343 on September 25, 2026.

60-session performance

-9.72%

From the July 1, 2026 close of $0.9241 to $0.8343 on September 25, 2026.

Quantum-Si Historical prices
Historical pricesOpenHighLowCloseVolumePrior-close change
$0.7943$0.84$0.7755$0.83432,593,483+$0.0493 (+6.28%)
$0.75$0.7991$0.7434$0.7851,593,305+$0.0263 (+3.47%)
$0.79$0.805$0.7515$0.75871,476,525-$0.026 (-3.31%)
$0.76$0.792$0.7511$0.78472,429,915+$0.0288 (+3.81%)
$0.7588$0.7661$0.75$0.75591,126,539+$0.0108 (+1.45%)
$0.79$0.8015$0.74$0.74511,713,327-$0.0249 (-3.23%)
$0.7495$0.7963$0.7495$0.772,826,084+$0.0399 (+5.47%)
$0.721$0.7532$0.721$0.7301915,220+$0.0101 (+1.40%)
$0.72$0.7409$0.72$0.721,166,814-$0.005 (-0.69%)
$0.7287$0.7478$0.7201$0.7251,390,457-$0.015 (-2.03%)
$0.7391$0.755$0.7391$0.741,074,255+$0.0009 (+0.12%)
$0.75$0.755$0.7251$0.73911,715,326-$0.0109 (-1.45%)
$0.7602$0.7748$0.746$0.751,449,017-$0.01 (-1.32%)
$0.7672$0.79$0.76$0.761,054,362-$0.006 (-0.78%)
$0.76$0.7742$0.76$0.766898,781+$0.005 (+0.66%)
$0.7669$0.7862$0.76$0.761979,997$0.00 (0.00%)
$0.7586$0.785$0.75$0.7611,619,344+$0.0037 (+0.49%)
$0.75$0.7768$0.7499$0.75731,504,027-$0.0086 (-1.12%)
$0.7787$0.78$0.763$0.76591,134,396-$0.0141 (-1.81%)
$0.8219$0.822$0.77$0.782,417,640-$0.0231 (-2.88%)
$0.7911$0.8337$0.79$0.80311,375,317+$0.0125 (+1.58%)
$0.85$0.855$0.7901$0.79062,662,929-$0.0567 (-6.69%)
$0.7888$0.859$0.7817$0.84734,371,715+$0.078 (+10.14%)
$0.80$0.83$0.7515$0.76933,853,818-$0.0657 (-7.87%)
$0.7848$0.931$0.78$0.8357,825,143+$0.055 (+7.05%)
$0.7666$0.8099$0.7666$0.783,233,618+$0.0099 (+1.29%)
$0.7193$0.7845$0.7193$0.77012,863,169+$0.0421 (+5.78%)
$0.7325$0.7439$0.7184$0.7281,520,321-$0.0162 (-2.18%)
$0.74$0.795$0.7394$0.74422,429,723+$0.0044 (+0.59%)
$0.75$0.767$0.71$0.73987,000,672-$0.0502 (-6.35%)
$0.855$0.9138$0.79$0.794,378,334-$0.0474 (-5.66%)
$0.8308$0.8699$0.8256$0.83741,499,137+$0.0172 (+2.10%)
$0.7951$0.8489$0.7951$0.82022,056,311+$0.0301 (+3.81%)
$0.8176$0.84$0.7901$0.79012,434,392-$0.0243 (-2.98%)
$0.7618$0.8285$0.7618$0.81442,730,131+$0.0594 (+7.87%)
$0.7522$0.779$0.75$0.7551,493,531-$0.0015 (-0.20%)
$0.7752$0.7926$0.7565$0.75652,484,839-$0.0089 (-1.16%)
$0.7642$0.796$0.7642$0.76543,986,332+$0.0194 (+2.60%)
$0.72$0.7599$0.711$0.7462,706,253+$0.0336 (+4.72%)
$0.73$0.748$0.71$0.71241,840,507-$0.0076 (-1.06%)
$0.7256$0.7441$0.69$0.723,557,134+$0.0177 (+2.52%)
$0.7574$0.7799$0.7023$0.70234,102,775-$0.0583 (-7.67%)
$0.775$0.7799$0.7401$0.76063,268,923-$0.0228 (-2.91%)
$0.7884$0.8097$0.7715$0.78341,086,514+$0.0133 (+1.73%)
$0.7944$0.8012$0.7608$0.77012,588,776-$0.0199 (-2.52%)
$0.79$0.828$0.7809$0.793,288,671-$0.01 (-1.25%)
$0.81$0.8454$0.80$0.802,843,613-$0.036 (-4.31%)
$0.8216$0.8498$0.8216$0.8361,470,895+$0.019 (+2.33%)
$0.83$0.8422$0.8099$0.8171,502,340-$0.0054 (-0.66%)
$0.82$0.8462$0.803$0.82242,295,009+$0.0031 (+0.38%)
$0.854$0.8558$0.806$0.81933,743,407-$0.0427 (-4.95%)
$0.8727$0.896$0.86$0.8622,255,408-$0.0042 (-0.48%)
$0.87$0.90$0.861$0.86621,202,687-$0.0031 (-0.36%)
$0.88$0.8828$0.85$0.86933,532,949-$0.0134 (-1.52%)
$0.9464$0.9544$0.882$0.88272,906,542-$0.0797 (-8.28%)
$0.91$0.9698$0.902$0.96242,575,864+$0.0497 (+5.45%)
$0.8855$0.93$0.8855$0.91273,422,649-$0.0068 (-0.74%)
$0.9369$0.9478$0.901$0.91953,710,303-$0.0322 (-3.38%)
$0.928$0.9799$0.9275$0.95172,626,555+$0.0213 (+2.29%)
$0.9257$1.01$0.9202$0.93046,037,314+$0.0063 (+0.68%)

Verified data

Trading days shown
60
Coverage start
July 2, 2026
Coverage end
September 25, 2026
Display currency
USD
Market data provider
Polygon

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Read the frequently asked questions.

What is Quantum-Si's latest verified closing price?

Quantum-Si closed at $0.8343 on September 25, 2026.

What period does Quantum-Si's price history cover?

The page shows 60 verified sessions from July 2, 2026 through September 25, 2026.

What data is included in Quantum-Si's daily price history?

Each row includes the open, high, low, close, volume and change from the prior close.

Does Quantum-Si's price history include market holidays?

The table contains only verified trading sessions and does not create prices for market holidays.

What is the source for Quantum-Si's daily prices?

Daily aggregate prices are provided by Polygon.