your badges 52W Range $1–$3 36% of range Analyst Rating BUY 7 analysts Price Target $2 +47% upside P/E · ROE · Net Profit Margin ·

QSI Stock Snapshot Price, market cap, P/E, EPS, ROE, debt/equity, 52-week range

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Price $1.55
52W Range $1–$3

QSI Stock Price Chart Daily OHLCV with technical indicators — pan, zoom, and customize your view

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10-Year Performance Revenue, net income, margins and EPS trends

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Valuation & Ratios 07–12

Valuation P/E, P/S, P/B, EV/EBITDA ratios — is the stock expensive or cheap?

No data for this ratio group yet

Not enough fundamentals data to compute this ratio group yet.

value · ≈ 5Y avg · industry median · verdict relative to median

Earnings History EPS actual vs estimate, surprise %, beat rate, next earnings date

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Avg Surprise 7.5%
Next Report Nov 03, 2026
PeriodReportEPS ActualEPS EstSurprise
June 30, 2026 Aug 13, 2026 $-0.11 $-0.12 6.6%
March 31, 2026 May 13, 2026 $-0.10 $-0.11 10.0%
Dec. 31, 2025 $-0.08 $-0.12 35.8%
Sept. 30, 2025 $-0.17 $-0.14 -23.2%
June 30, 2025 $-0.16 $-0.14 -13.2%
March 31, 2025 $-0.11 $-0.15 29.0%

Full Fundamentals All metrics by year — income statement, balance sheet, cash flow

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No annual filings for QSI

We don't have SEC filings for this ticker yet.

Most recent period on the left · null values shown as ·

Financial Statements Income statement, balance sheet, cash flow — annual, last 5 years

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No data for this statement

Not enough fundamentals data to build this statement yet.

Institutional owners (13F) 157 filers · $58.5M total · As of June 30, 2026

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Institutions that report holding this stock in their quarterly SEC Form 13F. Long positions only; a single filer may appear twice for separate option legs. Large offsetting put/call legs typically reflect market-making or hedged inventory, not directional conviction.

Holders 157
Value held $58.5M
New positions 28
Exited positions 41
Institutional activity — Q2 2026 vs prior quarter
New positions Exited positions Increased Decreased Net shares change
28 (-18 vs prior Q) 41 (+19 vs prior Q) 35 (-4 vs prior Q) 62 (+20 vs prior Q) -9.9M

Compared to Q1 2026. SEC Form 13F filings are due within 45 days of quarter-end plus a short buffer for late filers — quarters still inside that window are skipped in favor of the most recent fully-reported pair.

Institution Value Shares % of tracked 13F Type
VANGUARD GROUP INC $10,567,724 9,607,022 18.05% Shares
VANGUARD CAPITAL MANAGEMENT LLC $6,706,714 7,578,208 11.46% Shares
ARK Investment Management LLC $6,343,448 7,167,738 10.84% Shares
BlackRock, Inc. $4,624,436 5,225,352 7.90% Shares
Amova Asset Management Americas, Inc. $3,457,855 3,885,230 5.91% Shares
Sumitomo Mitsui Trust Group, Inc. $3,438,429 3,885,230 5.87% Shares
MILLENNIUM MANAGEMENT LLC $2,771,578 3,131,726 4.73% Shares
UBS Group AG $2,267,279 2,561,897 3.87% Shares
AQR CAPITAL MANAGEMENT LLC $2,078,569 2,348,665 3.55% Shares
GEODE CAPITAL MANAGEMENT, LLC $1,980,439 2,236,526 3.38% Shares
JANE STREET GROUP, LLC $1,896,320 2,142,735 3.24% Shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP $988,324 1,116,750 1.69% Shares
VANGUARD FIDUCIARY TRUST CO $988,264 1,116,683 1.69% Shares
STATE STREET CORP $788,306 890,741 1.35% Shares
Fosun International Ltd $658,382 743,935 1.12% Shares
RENAISSANCE TECHNOLOGIES LLC $490,176 553,871 0.84% Shares
VANGUARD PORTFOLIO MANAGEMENT LLC $439,932 497,098 0.75% Shares
GOLDMAN SACHS GROUP INC $421,515 476,288 0.72% Shares
NORTHERN TRUST CORP $398,720 450,531 0.68% Shares
Invesco Ltd. $392,877 443,929 0.67% Shares
BNP PARIBAS FINANCIAL MARKETS $352,759 398,598 0.60% Shares
IEQ CAPITAL, LLC $310,472 350,816 0.53% Shares
Aster Capital Management (DIFC) Ltd $304,891 344,510 0.52% Shares
MORGAN STANLEY $286,282 323,482 0.49% Shares
IQ EQ FUND MANAGEMENT (IRELAND) Ltd $284,204 321,134 0.49% Shares
WOLVERINE TRADING, LLC $281,336 202,400 0.48% Call option
Knollwood Investment Advisory, LLC $265,500 300,000 0.45% Shares
IMC-Chicago, LLC $252,896 285,758 0.43% Shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP $221,165 248,500 0.38% Put option
JANE STREET GROUP, LLC $218,860 247,300 0.37% Call option
BRIDGEWAY CAPITAL MANAGEMENT, LLC $182,399 206,100 0.31% Shares
BARCLAYS PLC $182,035 205,690 0.31% Shares
CITADEL ADVISORS LLC $160,185 181,000 0.27% Call option
XTX Topco Ltd $157,247 177,680 0.27% Shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP $153,258 172,200 0.26% Call option
SIMPLEX TRADING, LLC $146,284 165,293 0.25% Shares
Verdence Capital Advisors LLC $140,100 158,305 0.24% Shares
Mariner, LLC $139,553 157,689 0.24% Shares
Shay Capital LLC $133,566 150,922 0.23% Shares
FMR LLC $109,534 123,767 0.19% Shares
CWM, LLC $98,013 126,632 0.17% Shares
CITADEL ADVISORS LLC $95,226 107,600 0.16% Put option
GROUP ONE TRADING LLC $95,114 107,473 0.16% Shares
JONES FINANCIAL COMPANIES LLLP $85,812 100,483 0.15% Shares
AlphaCore Capital LLC $79,091 89,368 0.14% Shares
Cerity Partners LLC $75,533 85,347 0.13% Shares
Vanguard Global Advisers, LLC $75,010 84,757 0.13% Shares
CHARLES SCHWAB INVESTMENT MANAGEMENT INC $74,882 84,612 0.13% Shares
Callan Capital, LLC $73,140 60,950 0.12% Shares
Y-Intercept (Hong Kong) Ltd $69,994 79,089 0.12% Shares

Show all 157 institutional owners →

Activists & 5%+ owners 6 positions

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Investors who filed SEC Schedule 13D — beneficial ownership above 5% with an intent to influence the issuer (activist stakes, board campaigns, M&A). Each row shows the most recent known state of that filer's position.

Filer Filed Stake Status Purpose Filing
23rd Century Capital LLC, 4C Holdings I, LLC, 4C Holdings V, LLC, ROTHBERG JONATHAN M, ROTHBERG JONATHAN M. Aug. 28, 2026 100.00% Amendment · SEC
ROTHBERG JONATHAN M, ROTHBERG JONATHAN M., 23rd Century Capital LLC, 2012 JMR Trust Common, LLC, 4C Holdings I, LLC, 4C Holdings V, LLC ×2 filings Sept. 11, 2025 100.00% Amendment · SEC
Jonathan M. Rothberg, Ph.D., 23rd Century Capital LLC, 2012 JMR Trust Common, LLC, 4C Holdings I, LLC, 4C Holdings V, LLC ×3 filings Sept. 17, 2024 · Initial filing · SEC
Foresite Capital Fund IV, L.P. (“FCF IV”), Foresite Capital Management IV, LLC (“FCM IV”), Foresite Capital Fund V, L.P. (“FCF V”), Foresite Capital Management V, LLC (“FCM V”), Foresite Capital Opportunity Fund V, L.P. (“FCOF V”), Foresite Capital Opportunity Management V, LLC (“FCOM V”), James B. Tananbaum (“Tananbaum”) ×2 filings June 28, 2022 · Initial filing Passive investment SEC
Deerfield Mgmt, L.P., Deerfield Partners, L.P., Deerfield Management Company, L.P., James E. Flynn ×3 filings June 14, 2021 · Initial filing · SEC
HighCape Capital Acquisition LLC, Matt Zuga Sept. 15, 2020 · Initial filing Passive investment SEC

Purpose is an automated classification of the filer's own stated purpose (SEC Item 4) — not investment advice. "—" means no clear purpose was stated or the text could not be classified.

Company insiders 24 insiders · 11 officers · 15 directors

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Insider Role Last activity Shares owned Buys 12m Sells 12m Net 12m
Jeffrey Alan Hawkins President & CEO June 23, 2026 S 3,669,802 0 6 $-209,267
John Viii Stark Chief Executive Officer Jan. 11, 2022 S 1,977,368 0 0 $0
Jeffry R. Keyes Chief Financial Officer June 23, 2026 S 1,724,349 0 7 $-101,104
Claudia Drayton Chief Financial Officer March 15, 2023 A 95,700 0 0 $0
Patrick Schneider President and COO March 15, 2023 A · 0 0 $0
John S. Vieceli Chief Product Officer June 23, 2026 S 1,140,434 0 4 $-46,580
Christian Lapointe GC & Corp. Secretary June 23, 2026 S 1,182,429 0 4 $-24,540
Todd C. Bennett Chief Commercial Officer Sept. 23, 2025 S 681,521 0 0 $0
Grace Johnston Chief Commercial Officer June 24, 2024 S 295,940 0 0 $0
MCKENNA MICHAEL P EVP, Product Development & Ops March 15, 2023 A 869,021 0 0 $0
Matthew Dyer Chief Business Officer June 13, 2022 S 333,393 0 0 $0
Paula Dowdy Director May 18, 2026 A 269,107 1 0 $104,396
Amir Jafri Director May 18, 2026 A 115,942 0 0 $0
John P. Kenny Director May 18, 2026 A 114,285 0 0 $0
Charles R. Kummeth Director May 18, 2026 A 855,000 1 0 $460,000
Scott Mendel Director May 18, 2026 A 141,843 0 0 $0
Brigid Makes Director May 18, 2026 A 20,512 0 0 $0
Ruth A Fattori Director May 18, 2026 A 170,512 0 0 $0
Kevin Rakin Director May 18, 2026 A 1,200,000 0 0 $0
Rothberg Jonathan M. Director May 18, 2026 A 1,904,866 0 1 $-80,112
Michael Mina Director May 12, 2023 A 20,512 0 0 $0
Vikram Bajaj Director June 16, 2022 A 66,666 0 0 $0
Marijn E Dekkers Director May 11, 2022 A 170,512 0 0 $0
James B. Tananbaum Director June 11, 2021 A 20,512 0 0 $0

Insiders from SEC Form 3/4/5 filings; net = open-market P/S only

ETF ownership Held by 8 ETFs

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Weight reflects direct equity holdings (N-PORT) only; leveraged or derivative-based funds may hold additional swap exposure not shown.

Fund Weight Units As of Source
ARKG · ARK ETF Trust 0.31% 6,760,803 NS July 31, 2026 N-PORT
PRFZ · Invesco Exchange-Traded Fund Trust 0.02% 426,091 SH Oct. 1, 2026 Daily
IBBQ · Invesco Exchange-Traded Fund Trust … 0.01% 13,807 SH Oct. 1, 2026 Daily
IBB · iShares Trust 0.01% 1,276,802 SH Sept. 11, 2026 Daily
ITOT · iShares Trust 0.00% 434,364 SH Sept. 11, 2026 Daily
VXF · VANGUARD INDEX FUNDS 0.00% 2,072,639 SH Aug. 19, 2026 Daily
VTI · VANGUARD INDEX FUNDS 0.00% 5,353,930 SH Aug. 19, 2026 Daily
VHT · VANGUARD WORLD FUND 0.00% 497,098 SH Aug. 19, 2026 Daily

QSI Analyst Consensus Bullish and bearish analyst opinions, 12-month price target, upside

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rating · 7 analysts BUY
Median target $1.90 +22.6%
1 14.3% Strong Buy
4 57.1% Buy
2 28.6% Hold
0 0.0% Sell
0 0.0% Strong Sell

12-Month Price Target

3 analysts · 2026-09-30

Mean target $2.28 +47.3%

Now Current price $1.55
Low$1.00 Mean$2.28 High$3.95

Peer comparison (GICS sub-industry) Key metrics vs sector peers

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FY basis, prices as of each company's last fiscal year-end close.

Ticker Market Cap P/E Rev YoY Net Margin ROE Gross Margin
QSI · · · · · ·
PACB $565M -1.0 3.9% -341.5% -1634.9% 28.6%
CTKB $649M 505.0 0.52% -33.0% -18.5% 51.8%
MLAB $489M 73.1 3.4% 2.7% 3.7% 63.5%
OABI · · · · · ·
TKNO $204M -11.9 7.3% -42.6% -23.8% 33.2%
LAB $495M -6.4 -6.2% -87.8% -17.6% 49.9%
LFCR $249M -5.3 0.47% -30.0% -461.3% 31.3%
NAUT $247M -4.1 · · -34.9% ·
QTRX $297M -2.5 1.1% -77.1% -36.4% 46.8%
CDXS $147M -3.3 18.6% -62.5% -82.8% ·

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Source: SEC 10-Q filed Aug 13, 2026