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Disclosery

QSI QUANTUM SI INC

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COM CL A (common), issuer CIK 1816431

136 managers (138 13F filers) reported a position in QSI shares at 2025-03-31, 57,769,116 shares in all. 38 filers opened a position and 22 filers sold out during the quarter.

Managers
136
13F filers
138
New
38
Added
41
Reduced
35
Sold out
22
Shares held by filers
57,769,116

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2025

Filers in the available 13F reports with a share position at 2025-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
BlackRock, Inc.in group BlackRock, Inc.9,440,243$11.3M<0.01%+1,002,59613F-HRTimelineGroup
ARK Investment Management LLCin group ARK Investment Management LLC8,713,501$10.5M0.1%-135,14913F-HRTimelineGroup
VANGUARD GROUP INCgroup of 2 filers holding6,916,339$8.3M+1,404,641Timeline
Sumitomo Mitsui Trust Group, Inc.in group Sumitomo Mitsui Trust Group, …5,811,430$6.97M<0.01%-153,77813F-HRTimelineGroup
Amova Asset Management Americas, Inc.in group Amova Asset Management Americ…5,811,430$6.92M0.09%-153,77813F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC3,934,285$4.72M<0.01%new13F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC2,994,888$3.59M<0.01%+626,51213F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP2,454,106$2.94M<0.01%+49,08713F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP1,022,118$1.23M<0.01%+180,97213F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding895,875$1.08M+743,192Timeline
RENAISSANCE TECHNOLOGIES LLC871,756$1.05M<0.01%+326,80013F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…796,930$956K<0.01%-205,94313F-HRTimelineGroup
Fosun International Ltd743,935$893K0.25%013F-HRTimeline
UBS Group AGin group UBS Group AG449,682$540K<0.01%-142,43013F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC441,314$530K<0.01%-560,81613F-HR/ATimelineGroup
XTX Topco Ltdin group XTX Topco Ltd368,968$443K0.02%+123,38313F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co367,444$441K<0.01%+59,42313F-HR/ATimelineGroup
Nuveen, LLCin group TIAA319,100$383K<0.01%13F-HRTimelineGroup
Knollwood Investment Advisory, LLC300,000$360K0.04%013F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp294,906$354K<0.01%+25,09913F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY287,488$345K<0.01%-3,192,98013F-HRTimelineGroup
GSA CAPITAL PARTNERS LLP246,192$295K0.03%-128,08613F-HRTimeline
Green Alpha Advisors, LLC244,067$293K0.31%+85,20913F-HRTimeline
Pathstone Holdings, LLCin group Pathstone Holdings, LLC214,309$257K<0.01%+85,72513F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC196,100$235K0.01%-100,00013F-HRTimeline
RHUMBLINE ADVISERS149,973$180K<0.01%+1,02713F-HR/ATimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC138,498$166K<0.01%new13F-HRTimelineGroup
GUGGENHEIM CAPITAL LLCin group GUGGENHEIM CAPITAL LLC129,021$155K<0.01%-70,97813F-HRTimelineGroup
Shay Capital LLC128,500$154K0.04%-88,04613F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC120,888$145K<0.01%-29,72813F-HR/ATimelineGroup
ALLIANCEBERNSTEIN L.P.110,180$132K<0.01%+34,10013F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/108,174$130K<0.01%-94013F-HRTimeline
Invesco Ltd.in group Invesco Ltd.103,657$124K<0.01%+66,33613F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC96,042$115K<0.01%-6,35613F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC92,875$111K<0.01%new13F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/88,495$106K<0.01%-23,37613F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC84,459$101K<0.01%-5,78913F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN83,333$100K<0.01%+11,35313F-HRTimelineGroup
Jefferies Financial Group Inc.in group Jefferies Financial Group Inc.83,031$99.6K<0.01%new13F-HRTimelineGroup
FMR LLCin group FMR LLC79,623$95.5K<0.01%-69813F-HRTimelineGroup
EWA, LLC78,688$94.4K0.04%new13F-HRTimeline
Sculptor Capital LPin group Sculptor Capital LP78,200$93.8K<0.01%new13F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…76,015$91.2K<0.01%new13F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…70,552$84.7K<0.01%+13,54613F-HRTimelineGroup
IQ EQ FUND MANAGEMENT (IRELAND) Ltd69,944$83.9K0.01%+36,04213F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\67,522$81K<0.01%+34,96213F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC61,365$73.6K<0.01%+10,52813F-HRTimeline
Callan Capital, LLC60,950$73.1K0.01%+50,15013F-HRTimeline
Corebridge Financial, Inc.in group Corebridge Financial, Inc.58,876$70.7K<0.01%+9,08613F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO57,651$69.2K<0.01%+12,79413F-HRTimelineGroup
TWO SIGMA SECURITIES, LLC52,220$62.7K0.01%new13F-HRTimeline
Mariner, LLCin group Mariner, LLC48,005$57.6K<0.01%+14,56613F-HRTimelineGroup
WOLVERINE TRADING, LLC40,458$51.4K<0.01%-71,47713F-HRTimeline
SIMPLEX TRADING, LLC42,909$51K<0.01%-263,86013F-HRTimeline
COMMONWEALTH EQUITY SERVICES, LLC40,868$49K<0.01%+9,85513F-HRTimeline
SG Americas Securities, LLC40,079$48K<0.01%-27,50913F-HRTimeline
Cambridge Investment Research Advisors,…38,867$47K<0.01%013F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …38,518$46.2K<0.01%+3,66813F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…38,257$45.9K<0.01%+29,20413F-HRTimelineGroup
Red Wave Investments LLC37,000$44.4K0.02%013F-HRTimeline
Sanctuary Advisors, LLC36,782$44.1K<0.01%+1,53913F-HRTimeline
Virtu Financial LLCin group Virtu Financial LLC34,830$42K<0.01%new13F-HRTimelineGroup
CAPTRUST FINANCIAL ADVISORS34,583$41.5K<0.01%new13F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO33,103$39.7K<0.01%013F-HR/ATimelineGroup
Police & Firemen's Retirement System of…31,134$37.4K<0.01%013F-HRTimeline
Atom Investors LP30,172$36.2K<0.01%new13F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC29,552$35.5K<0.01%-1,31113F-HR/ATimelineGroup
MERCER GLOBAL ADVISORS INC /ADV27,113$32.5K<0.01%-3,84613F-HRTimeline
Wealth Management Associates, Inc.26,950$32.3K0.01%-8,10013F-HRTimeline
CIBC WORLD MARKETS CORP26,667$32K<0.01%new13F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND26,084$31.3K<0.01%013F-HR/ATimeline
ProShare Advisors LLC26,016$31.2K<0.01%-2,18813F-HRTimeline
Leonteq Securities AG25,000$30.1K<0.01%new13F-HRTimeline
HBW ADVISORY SERVICES LLC24,243$29.1K<0.01%new13F-HRTimeline
WestHill Financial Advisors, Inc.21,727$26.1K0.01%new13F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…21,026$25.2K<0.01%-2,32113F-HRTimelineGroup
LPL Financial LLC20,112$24.1K<0.01%new13F-HRTimeline
CIBC WORLD MARKET INC.20,011$24K<0.01%new13F-HRTimeline
HOLLENCREST CAPITAL MANAGEMENT20,000$24K<0.01%new13F-HRTimeline
Cetera Investment Advisers19,101$22.9K<0.01%+5,72113F-HRTimeline
DLK Investment Management, LLC19,000$22.8K0.01%013F-HRTimeline
SBI Securities Co., Ltd.18,970$22.8K<0.01%-3,29113F-HRTimeline
Stratos Wealth Advisors, LLCin group Stratos Wealth Partners, LTD.18,310$22K<0.01%new13F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC16,593$19.9K<0.01%+4,52913F-HRTimeline
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC15,919$19.1K<0.01%new13F-HRTimelineGroup
Kestra Advisory Services, LLCin group Kestra Advisory Services, LLC15,090$18.1K<0.01%new13F-HRTimelineGroup
MARK SHEPTOFF FINANCIAL PLANNING, LLC14,500$17.4K0.01%+7,50013F-HRTimeline
Flagship Private Wealth, LLC14,158$17K0.01%013F-HRTimeline
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC13,987$16.6K<0.01%+2,24513F-HRTimelineGroup
Procyon Advisors, LLC13,671$16.4K<0.01%013F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA13,429$16K<0.01%+81313F-HR/ATimelineGroup
STATE BOARD OF ADMINISTRATION OF FLORID…12,300$14.8K<0.01%new13F-HRTimeline
Dash Acquisitions Inc.10,000$14.6K<0.01%new13F-HRTimeline
Abel Hall, LLC12,008$14.4K0.01%+1,57613F-HRTimeline
THOROUGHBRED FINANCIAL SERVICES, LLC12,000$14K<0.01%-21,00013F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/11,100$13.3K<0.01%new13F-HRTimelineGroup
PRINCIPAL SECURITIES, INC.in group PRINCIPAL FINANCIAL GROUP INC4,912$13.3K<0.01%013F-HRTimelineGroup
Freedom Investment Management, Inc.11,051$13.3K<0.01%-5,41413F-HRTimeline
SIH Partners, LLLPin group SIH Partners, LLLP10,624$12.7K<0.01%new13F-HRTimelineGroup
Ballew Advisors, Inc10,000$12.5K0.01%new13F-HRTimeline
NewEdge Advisors, LLC10,250$12.3K<0.01%013F-HRTimeline
Kingsview Wealth Management, LLC10,012$12K<0.01%new13F-HRTimeline
Capital Investment Advisory Services, L…10,000$12K<0.01%new13F-HRTimeline
TriaGen Wealth Management LLC10,000$12K<0.01%013F-HRTimeline
Glen Eagle Advisors, LLC10,000$12K<0.01%new13F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…9,906$11.9K<0.01%013F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc9,294$11.1K<0.01%013F-HRTimelineGroup
CIBC Private Wealth Group LLCin group CIBC Bancorp USA Inc.10,000$10.8K<0.01%new13F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS8,617$10.3K<0.01%-10,40813F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…7,257$8.71K<0.01%013F-HRTimeline
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC6,875$8.25K<0.01%-2,75713F-HRTimelineGroup
AMALGAMATED BANK4,142$5K<0.01%+97213F-HRTimeline
N.E.W. Advisory Services LLC3,854$4.62K<0.01%new13F-HRTimeline
PINNEY & SCOFIELD, INC.3,680$4.42K<0.01%013F-HRTimeline
FNY Investment Advisers, LLC4,000$4K<0.01%new13F-HRTimeline
CWM, LLCin group CWM, LLC3,577$4K<0.01%+1,00913F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP3,000$3.81K<0.01%new13F-HR/ATimelineGroup
Sterling Capital Management LLC2,074$2.49K<0.01%-1,32713F-HRTimeline
Archer Investment Corp2,000$2.4K<0.01%013F-HRTimeline
CoreCap Advisors, LLC1,748$2.1K<0.01%+1,27313F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.1,120$1.34K<0.01%-26,75013F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC1,116$1.34K<0.01%-6,40013F-HRTimeline
Allworth Financial LP836$1.02K<0.01%013F-HRTimeline
TD Waterhouse Canada Inc.800$950<0.01%013F-HRTimeline
Physician Wealth Advisors, Inc.687$825<0.01%new13F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…557$668<0.01%+53113F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…489$587<0.01%+48313F-HRTimelineGroup
Bangor Savings Bank400$480<0.01%new13F-HRTimeline
Headlands Technologies LLC325$390<0.01%new13F-HRTimeline
Medallion Wealth Advisors, LLC261$314<0.01%+513F-HRTimeline
FSA Wealth Management LLC100$120<0.01%013F-HRTimeline
American Capital Advisory, LLC100$120<0.01%013F-HRTimeline
Federation des caisses Desjardins du Qu…50$60<0.01%-6,10013F-HRTimeline
True Wealth Design, LLC2$3<0.01%new13F-HRTimeline
Capital Advisors, Ltd. LLC60$00%-50113F-HRTimelineValue filed as zero, left out of ratios.
CONCOURSE FINANCIAL GROUP SECURITIES, I…0$0013F-HRTimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.