QUANTUM COMPUTING INC (QUBT) Institutional Shareholders
QUANTUM COMPUTING INC (QUBT) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $605.08M in QUBT holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of QUBT tracked by InsiderSet, reporting ownership valued at approximately $110.55M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $130.73M, representing an estimated gain of +18.25% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 63% of the total disclosed QUBT value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, Vanguard Portfolio Management Llc, and several other long-term asset managers with concentrated positions in QUANTUM COMPUTING INC (QUBT).
This page ranks the largest institutional QUBT shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
304
Total Reported Value
$605.08M
Largest Holder
Blackrock, Inc.
Largest Position
$110.55M
Insider Transactions (90d)
3
Latest Filing Quarter
Q2 2026
New Institutional Positions
70
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 16,139,212 | $110,553,604 | $130,727,617 | +$20,174,013 | +18.25% | |
| Vanguard Capital Management Llc | 0.00% | 8,762,295 | $60,021,721 | $70,974,590 | +$10,952,869 | +18.25% | |
| Vanguard Portfolio Management Llc | 0.00% | 6,710,124 | $45,964,349 | $54,352,004 | +$8,387,655 | +18.25% | |
| Geode Capital Management, Llc | 0.00% | 4,700,305 | $32,203,039 | $38,072,471 | +$5,869,432 | +18.23% | |
| State Street Corp | 0.00% | 4,516,820 | $30,940,217 | $36,586,242 | +$5,646,025 | +18.25% | |
| Defiance Etfs, Llc | 0.44% | 4,495,083 | $30,791,319 | $36,410,172 | +$5,618,853 | +18.25% | |
| Marex Group Plc | 0.35% | 4,488,912 | $30,749,047 | $36,360,187 | +$5,611,140 | +18.25% | |
| Morgan Stanley | 0.00% | 2,320,726 | $15,896,973 | $18,797,881 | +$2,900,908 | +18.25% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.02% | 2,203,301 | $15,073,061 | $17,846,738 | +$2,773,677 | +18.40% | |
| Capital Fund Management S.A. | 0.10% | 1,700,895 | $11,651,130 | $13,777,250 | +$2,126,120 | +18.25% | |
| Northern Trust Corp | 0.00% | 1,689,081 | $11,570,205 | $13,681,556 | +$2,111,351 | +18.25% | |
| Mubadala Investment Co Pjsc | 0.05% | 1,587,350 | $10,873,348 | $12,857,535 | +$1,984,187 | +18.25% | |
| Charles Schwab Investment Management Inc | 0.00% | 1,492,210 | $10,221,639 | $12,086,901 | +$1,865,262 | +18.25% | |
| Squarepoint Ops Llc | 0.02% | 1,351,733 | $9,259,371 | $10,949,037 | +$1,689,666 | +18.25% | |
| Vanguard Fiduciary Trust Co | 0.00% | 1,343,626 | $9,203,838 | $10,883,371 | +$1,679,533 | +18.25% | |
| Ubs Group Ag | 0.00% | 1,315,692 | $9,012,490 | $10,657,105 | +$1,644,615 | +18.25% | |
| Focus Financial Network, Inc. | 0.27% | 911,635 | $8,842,859 | $7,384,244 | -$1,458,616 | -16.49% | |
| Bank Of New York Mellon Corp | 0.00% | 1,022,604 | $7,004,836 | $8,283,092 | +$1,278,256 | +18.25% | |
| Pacific Heights Asset Management Llc | 0.23% | 1,000,000 | $6,850,000 | $8,100,000 | +$1,250,000 | +18.25% | |
| Jump Financial, Llc | 0.10% | 939,433 | $6,435,116 | $7,609,407 | +$1,174,291 | +18.25% | |
| Goldman Sachs Group Inc | 0.00% | 907,974 | $6,219,621 | $7,354,589 | +$1,134,968 | +18.25% | |
| Citadel Advisors Llc | 0.00% | 860,980 | $5,897,713 | $6,973,938 | +$1,076,225 | +18.25% | |
| Clear Street Group Inc. | 0.03% | 842,219 | $5,769,200 | $6,821,974 | +$1,052,774 | +18.25% | |
| Raymond James Financial Inc | 0.00% | 789,583 | $5,408,644 | $6,395,622 | +$986,978 | +18.25% | |
| D. E. Shaw & Co., Inc. | 0.00% | 718,210 | $4,919,739 | $5,817,501 | +$897,762 | +18.25% | |
| Susquehanna International Group, Llp | 0.01% | 687,823 | $4,711,588 | $5,571,366 | +$859,778 | +18.25% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 667,674 | $4,573,567 | $5,408,159 | +$834,592 | +18.25% |
| Engineers Gate Manager Lp | 0.06% | 658,589 | $4,511,335 | $5,334,571 | +$823,236 | +18.25% | |
| Nuveen, Llc | 0.00% | 631,678 | $4,326,995 | $5,116,592 | +$789,597 | +18.25% | |
| Unicom Systems, Inc. | 0.23% | 362,279 | $3,514,106 | $2,934,460 | -$579,646 | -16.49% | |
| Blackstone Inc. | 0.01% | 500,000 | $3,425,000 | $4,050,000 | +$625,000 | +18.25% | |
| Bank Of America Corp | 0.00% | 439,775 | $3,012,459 | $3,562,178 | +$549,719 | +18.25% | |
| Quantbot Technologies Lp | 0.12% | 411,048 | $2,815,679 | $3,329,489 | +$513,810 | +18.25% | |
| Swiss National Bank | 0.00% | 397,700 | $2,724,245 | $3,221,370 | +$497,125 | +18.25% | |
| Two Sigma Investments, Lp | 0.00% | 384,252 | $2,632,126 | $3,112,441 | +$480,315 | +18.25% | |
| Bnp Paribas Financial Markets | 0.00% | 340,925 | $2,335,336 | $2,761,493 | +$426,157 | +18.25% | |
| Alliancebernstein L.P. | 0.00% | 210,478 | $2,159,504 | $1,704,872 | -$454,632 | -21.05% | |
| Lpl Financial Llc | 0.00% | 282,863 | $1,937,612 | $2,291,190 | +$353,578 | +18.25% | |
| Headlands Technologies Llc | 0.22% | 277,198 | $1,898,806 | $2,245,304 | +$346,498 | +18.25% | |
| California State Teachers Retirement System | 0.00% | 252,002 | $1,726,214 | $2,041,216 | +$315,002 | +18.25% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 250,461 | $1,715,658 | $2,028,734 | +$313,076 | +18.25% | |
| Slt Holdings Llc | 1.06% | 170,550 | $1,654,335 | $1,381,455 | -$272,880 | -16.49% | |
| Rhumbline Advisers | 0.00% | 234,995 | $1,609,704 | $1,903,460 | +$293,756 | +18.25% | |
| Quadrature Capital Ltd | 0.02% | 209,348 | $1,434,034 | $1,695,719 | +$261,685 | +18.25% | |
| Sbi Securities Co., Ltd. | 0.03% | 143,253 | $1,389,554 | $1,160,349 | -$229,205 | -16.49% | |
| Royal Bank Of Canada | 0.00% | 197,491 | $1,352,000 | $1,599,677 | +$247,677 | +18.32% | |
| Foundations Investment Advisors, Llc | 0.02% | 189,817 | $1,300,246 | $1,537,518 | +$237,272 | +18.25% | |
| Los Angeles Capital Management Llc | 0.01% | 185,609 | $1,271,421 | $1,503,433 | +$232,012 | +18.25% | |
| Walleye Trading Llc | 0.03% | 178,992 | $1,226,095 | $1,449,835 | +$223,740 | +18.25% | |
| Deutsche Bank Ag\ | 0.00% | 173,588 | $1,189,078 | $1,406,063 | +$216,985 | +18.25% |
Frequently asked questions about QUBT
Who owns the most QUBT stock?
The largest holders of QUBT are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for QUANTUM COMPUTING INC (QUBT).
Is QUBT widely held by superinvestors?
Many widely followed stocks like QUBT appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly QUBT is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.