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NASDAQ:QUMS Quantumsphere Acquisition Corp. Stock

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Share price · NASDAQ:QUMS

$10.40 USD 0.00 (0.0%)

Close on Oct 29, 2026

Past year +4.2% · daily closes, Oct 29, 2025 – Oct 29, 2026, adjusted for splits

Day range: $10.40 – $10.40 USDOct 29, 2026
Volume: 2,064 sharesOct 29, 2026
Market cap: $118.6M USDAt the close on Oct 29, 2026 · price × 11.41M shares outstanding
52-week range: $9.97 – $10.40 USDLowest and highest trades, Oct 30, 2025 – Oct 29, 2026
Traded on an average day: $267,707 USDMedian day 450 shares · 18 days with no trades · last 3 months, Jul 29, 2026 – Oct 29, 2026

Prices by listing

Listing	Last	Change	Volume	Open	High	Low	Previous close	Price from
NASDAQ:QUMS · Home	$10.40 USD	0.00 (0.0%)	2,064	$10.40	$10.40	$10.40	$10.40	Close on Oct 29, 2026
NASDAQ:QUMSU	$10.30 USD	0.00 (0.0%)	—	$10.30	$10.30	$10.30	$10.30	Close on Oct 27, 2026

Daily closes

Last 3 months, Jul 29, 2026 – Oct 29, 2026 · NASDAQ:QUMS · USD, adjusted for splits

Day	Close	Change	%	Open	High	Low	Volume
Thu, Oct 29	$10.40	0.00	0.0%	$10.40	$10.40	$10.40	2,064
Wed, Oct 28	$10.40	0.00	0.0%	$10.40	$10.40	$10.40	176
Tue, Oct 27	$10.40	0.00	0.0%	$10.40	$10.40	$10.40	5,076
Mon, Oct 26	$10.40	+0.02	+0.2%	$10.40	$10.40	$10.40	15,735
Fri, Oct 23	$10.38	0.00	0.0%	$10.38	$10.38	$10.38	0
Thu, Oct 22	$10.38	0.00	0.0%	$10.38	$10.38	$10.38	77
Wed, Oct 21	$10.38	0.00	0.0%	$10.38	$10.38	$10.38	7,600
Tue, Oct 20	$10.38	0.00	0.0%	$10.38	$10.38	$10.38	7,500
Mon, Oct 19	$10.38	0.00	0.0%	$10.38	$10.38	$10.38	0
Fri, Oct 16	$10.38	0.00	0.0%	$10.38	$10.38	$10.38	0
Thu, Oct 15	$10.38	0.00	0.0%	$10.38	$10.38	$10.38	0
Wed, Oct 14	$10.38	0.00	0.0%	$10.38	$10.38	$10.38	52,300
Tue, Oct 13	$10.38	+0.02	+0.2%	$10.38	$10.38	$10.38	200
Mon, Oct 12	$10.36	+0.01	+0.1%	$10.36	$10.36	$10.36	15,400
Fri, Oct 9	$10.35	0.00	0.0%	$10.35	$10.35	$10.35	10
Thu, Oct 8	$10.35	0.00	0.0%	$10.35	$10.35	$10.35	0
Wed, Oct 7	$10.35	0.00	0.0%	$10.35	$10.35	$10.35	300
Tue, Oct 6	$10.35	0.00	0.0%	$10.35	$10.35	$10.35	200
Mon, Oct 5	$10.35	0.00	0.0%	$10.35	$10.36	$10.35	142,100
Fri, Oct 2	$10.35	-0.01	-0.1%	$10.35	$10.35	$10.35	175,500
Thu, Oct 1	$10.36	+0.01	+0.1%	$10.36	$10.36	$10.36	200
Wed, Sep 30	$10.35	+0.01	+0.1%	$10.35	$10.35	$10.35	73,000
Tue, Sep 29	$10.34	0.00	0.0%	$10.34	$10.34	$10.34	0
Mon, Sep 28	$10.34	0.00	0.0%	$10.34	$10.34	$10.34	500
Fri, Sep 25	$10.34	0.00	0.0%	$10.34	$10.34	$10.34	0
Thu, Sep 24	$10.34	0.00	0.0%	$10.35	$10.35	$10.34	25,700
Wed, Sep 23	$10.34	0.00	0.0%	$10.34	$10.34	$10.34	73,500
Tue, Sep 22	$10.34	+0.01	+0.1%	$10.33	$10.34	$10.33	56,900
Mon, Sep 21	$10.33	0.00	0.0%	$10.33	$10.33	$10.32	25,600
Fri, Sep 18	$10.33	+0.01	+0.1%	$10.33	$10.33	$10.33	5,200
Thu, Sep 17	$10.32	-0.02	-0.2%	$10.33	$10.34	$10.32	45,300
Wed, Sep 16	$10.34	0.00	0.0%	$10.34	$10.34	$10.34	0
Tue, Sep 15	$10.34	0.00	0.0%	$10.34	$10.34	$10.34	0
Mon, Sep 14	$10.34	0.00	0.0%	$10.34	$10.34	$10.34	0
Fri, Sep 11	$10.34	+0.01	+0.1%	$10.34	$10.34	$10.34	400
Thu, Sep 10	$10.33	0.00	0.0%	$10.33	$10.33	$10.33	50,200
Wed, Sep 9	$10.33	0.00	0.0%	$10.33	$10.33	$10.33	50,200
Tue, Sep 8	$10.33	0.00	0.0%	$10.33	$10.33	$10.33	77,400
Fri, Sep 4	$10.33	0.00	0.0%	$10.33	$10.33	$10.33	300
Thu, Sep 3	$10.33	0.00	0.0%	$10.33	$10.33	$10.33	100
Wed, Sep 2	$10.33	0.00	0.0%	$10.33	$10.33	$10.33	200
Tue, Sep 1	$10.33	0.00	0.0%	$10.33	$10.33	$10.33	0
Mon, Aug 31	$10.33	0.00	0.0%	$10.33	$10.33	$10.33	0
Fri, Aug 28	$10.33	+0.01	+0.1%	$10.33	$10.33	$10.33	200
Thu, Aug 27	$10.32	0.00	0.0%	$10.31	$10.32	$10.31	23,700
Wed, Aug 26	$10.32	0.00	0.0%	$10.32	$10.32	$10.32	200
Tue, Aug 25	$10.32	0.00	0.0%	$10.32	$10.32	$10.32	21
Mon, Aug 24	$10.32	0.00	0.0%	$10.32	$10.32	$10.32	0
Fri, Aug 21	$10.32	0.00	0.0%	$10.33	$10.33	$10.32	20,500
Thu, Aug 20	$10.32	0.00	0.0%	$10.32	$10.32	$10.32	0
Wed, Aug 19	$10.32	+0.01	+0.1%	$10.31	$10.32	$10.31	186,400
Tue, Aug 18	$10.31	-0.005	0.0%	$10.31	$10.32	$10.31	900
Mon, Aug 17	$10.32	+0.005	0.0%	$10.31	$10.32	$10.31	2,600
Fri, Aug 14	$10.31	0.00	0.0%	$10.31	$10.31	$10.31	21,000
Thu, Aug 13	$10.31	+0.01	+0.1%	$10.31	$10.31	$10.31	200
Wed, Aug 12	$10.30	0.00	0.0%	$10.30	$10.30	$10.30	44,300
Tue, Aug 11	$10.30	0.00	0.0%	$10.30	$10.30	$10.30	80,177
Mon, Aug 10	$10.30	0.00	0.0%	$10.30	$10.30	$10.30	26,560
Fri, Aug 7	$10.30	0.00	0.0%	$10.30	$10.30	$10.30	0
Thu, Aug 6	$10.30	+0.01	+0.1%	$10.29	$10.30	$10.29	328,200
Wed, Aug 5	$10.29	0.00	0.0%	$10.29	$10.29	$10.29	8,000
Tue, Aug 4	$10.29	+0.01	+0.1%	$10.29	$10.29	$10.29	12,100
Mon, Aug 3	$10.28	0.00	0.0%	$10.28	$10.28	$10.28	0
Fri, Jul 31	$10.28	0.00	0.0%	$10.28	$10.28	$10.28	0
Thu, Jul 30	$10.28	+0.01	+0.1%	$10.28	$10.28	$10.28	47,000
Wed, Jul 29	$10.27	0.00	0.0%	$10.27	$10.27	$10.27	0