Archimedes Tech SPAC Partners III - Unit Stock Price History

NASDAQ: ARCIUFinanceBlank ChecksUSD

10.240.00 (0.00%)

At close: Oct 5, 4:00 PM ET · Delayed 15 min

ARCIU price history at a glance

The price history for Archimedes Tech SPAC Partners III - Unit (ARCIU) on this page begins on January 19, 2026, when the stock closed at $10.13; it most recently closed at $10.24 on October 5, 2026. The highest price in this record is $10.66, reached on June 8, 2026; the latest close is 3.9% below that peak. Prices are split-adjusted closing prices; daily open, high, low, close and volume for the past year are listed below.

Summary generated from market data by MetaCap's automated system. Methodology

Key price levels

High since 2026: $10.66
Date of high: Jun 8, 2026
Low since 2026: $9.99
Date of low: Mar 23, 2026
52-week high: $10.66
52-week low: $9.99
IPO year: 2026
Last close: $10.24

ARCIU returns

1 week

-0.05%

1 month

-1.44%

3 months

+0.39%

6 months

+2.40%

ARCIU price return, excluding dividends.

ARCIU daily prices (past year)

Daily open, high, low, close and volume
Date	Open	High	Low	Close	Change	Volume
Oct 7, 2026	10.24	10.24	10.24	10.24	0.00%	0
Oct 6, 2026	10.24	10.24	10.24	10.24	0.00%	0
Oct 5, 2026	10.17	10.24	10.17	10.24	-0.05%	900
Oct 2, 2026	10.25	10.25	10.25	10.25	0.00%	0
Oct 1, 2026	10.25	10.25	10.25	10.25	0.00%	0
Sep 30, 2026	10.25	10.25	10.25	10.25	0.00%	0
Sep 29, 2026	10.25	10.25	10.25	10.25	0.00%	0
Sep 28, 2026	10.25	10.25	10.25	10.25	0.00%	0
Sep 25, 2026	10.25	10.25	10.25	10.25	0.00%	0
Sep 24, 2026	10.26	10.26	10.21	10.25	-0.53%	5.30K
Sep 23, 2026	10.30	10.30	10.30	10.30	0.00%	0
Sep 22, 2026	10.23	10.61	10.23	10.30	-0.96%	600
Sep 21, 2026	10.40	10.40	10.40	10.40	0.00%	0
Sep 18, 2026	10.40	10.40	10.40	10.40	0.00%	0
Sep 17, 2026	10.40	10.40	10.40	10.40	0.00%	0
Sep 16, 2026	10.40	10.40	10.40	10.40	0.00%	0
Sep 15, 2026	10.40	10.40	10.40	10.40	0.00%	0
Sep 14, 2026	10.40	10.40	10.40	10.40	0.00%	0
Sep 11, 2026	10.40	10.40	10.40	10.40	0.00%	0
Sep 10, 2026	10.23	10.40	10.23	10.40	+0.10%	2.80K
Sep 9, 2026	10.39	10.39	10.39	10.39	0.00%	0
Sep 8, 2026	10.39	10.39	10.39	10.39	0.00%	0
Sep 4, 2026	10.40	10.40	10.35	10.39	-0.38%	3.30K
Sep 3, 2026	10.34	10.43	10.34	10.43	+0.19%	1.00K
Sep 2, 2026	10.41	10.41	10.41	10.41	0.00%	0
Sep 1, 2026	10.41	10.41	10.41	10.41	0.00%	0
Aug 31, 2026	10.24	10.41	10.24	10.41	0.00%	300
Aug 28, 2026	10.41	10.41	10.41	10.41	+0.29%	100
Aug 27, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 26, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 25, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 24, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 21, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 20, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 19, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 18, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 17, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 14, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 13, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 12, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 11, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 10, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 7, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 6, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 5, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 4, 2026	10.38	10.38	10.38	10.38	0.00%	0
Aug 3, 2026	10.38	10.38	10.38	10.38	0.00%	0
Jul 31, 2026	10.20	10.38	10.20	10.38	+0.29%	300
Jul 30, 2026	10.35	10.35	10.35	10.35	0.00%	0
Jul 29, 2026	10.35	10.35	10.35	10.35	0.00%	0
Jul 28, 2026	10.35	10.35	10.35	10.35	0.00%	0
Jul 27, 2026	10.35	10.35	10.35	10.35	0.00%	0
Jul 24, 2026	10.22	10.35	10.22	10.35	-0.29%	100.20K
Jul 23, 2026	10.38	10.38	10.38	10.38	0.00%	0
Jul 22, 2026	10.38	10.38	10.38	10.38	0.00%	0
Jul 21, 2026	10.35	10.38	10.35	10.38	+2.37%	1.50K
Jul 20, 2026	10.14	10.14	10.14	10.14	0.00%	0
Jul 17, 2026	10.14	10.14	10.14	10.14	0.00%	0
Jul 16, 2026	10.14	10.14	10.14	10.14	0.00%	0
Jul 15, 2026	10.14	10.14	10.14	10.14	-0.59%	100
Jul 14, 2026	10.20	10.20	10.20	10.20	0.00%	0
Jul 13, 2026	10.20	10.20	10.20	10.20	0.00%	0
Jul 10, 2026	10.20	10.20	10.20	10.20	0.00%	0
Jul 9, 2026	10.20	10.20	10.20	10.20	0.00%	0
Jul 8, 2026	10.20	10.20	10.20	10.20	0.00%	24.30K
Jul 7, 2026	10.20	10.20	10.20	10.20	-1.40%	400
Jul 6, 2026	10.35	10.35	10.35	10.35	+1.52%	1.10K
Jul 2, 2026	10.19	10.19	10.19	10.19	0.00%	0
Jul 1, 2026	10.19	10.19	10.19	10.19	0.00%	0
Jun 30, 2026	10.19	10.19	10.19	10.19	0.00%	0
Jun 29, 2026	10.26	10.26	10.19	10.19	+0.39%	10.50K
Jun 26, 2026	10.15	10.15	10.15	10.15	0.00%	0
Jun 25, 2026	10.15	10.15	10.15	10.15	0.00%	0
Jun 24, 2026	10.15	10.15	10.15	10.15	0.00%	0
Jun 23, 2026	10.15	10.15	10.15	10.15	0.00%	0
Jun 22, 2026	10.15	10.15	10.15	10.15	0.00%	0
Jun 18, 2026	10.15	10.15	10.15	10.15	0.00%	1.50K
Jun 17, 2026	10.15	10.15	10.15	10.15	0.00%	0
Jun 16, 2026	10.15	10.15	10.15	10.15	0.00%	0
Jun 15, 2026	10.15	10.15	10.15	10.15	0.00%	0
Jun 12, 2026	10.15	10.15	10.15	10.15	0.00%	0
Jun 11, 2026	10.26	10.26	10.15	10.15	+0.30%	4.20K
Jun 10, 2026	10.66	10.66	10.12	10.12	+0.20%	600
Jun 9, 2026	10.10	10.10	10.10	10.10	0.00%	0
Jun 8, 2026	10.10	10.10	10.10	10.10	0.00%	1.50K
Jun 5, 2026	10.10	10.10	10.10	10.10	0.00%	0
Jun 4, 2026	10.10	10.10	10.10	10.10	-0.10%	400
Jun 3, 2026	10.11	10.11	10.11	10.11	0.00%	0
Jun 2, 2026	10.11	10.11	10.11	10.11	0.00%	0
Jun 1, 2026	10.11	10.11	10.11	10.11	0.00%	0
May 29, 2026	10.11	10.11	10.11	10.11	0.00%	0
May 28, 2026	10.05	10.20	10.02	10.11	+0.20%	17.90K
May 27, 2026	10.09	10.09	10.09	10.09	+0.10%	200
May 26, 2026	10.09	10.09	10.08	10.08	+0.30%	400
May 22, 2026	10.05	10.05	10.05	10.05	0.00%	2.70K
May 21, 2026	10.05	10.15	10.05	10.05	0.00%	8.40K
May 20, 2026	10.05	10.05	10.05	10.05	0.00%	0
May 19, 2026	10.05	10.05	10.05	10.05	0.00%	0
May 18, 2026	10.05	10.05	10.05	10.05	0.00%	0
May 15, 2026	10.05	10.05	10.05	10.05	0.00%	0
May 14, 2026	10.05	10.05	10.05	10.05	0.00%	100
May 13, 2026	10.05	10.05	10.04	10.05	+0.10%	1.50K
May 12, 2026	10.05	10.05	10.04	10.04	0.00%	1.10K
May 11, 2026	10.03	10.04	10.03	10.04	+0.30%	7.20K
May 8, 2026	10.01	10.01	10.01	10.01	0.00%	0
May 7, 2026	10.01	10.01	10.01	10.01	+0.20%	4.00K
May 6, 2026	9.99	9.99	9.99	9.99	0.00%	0
May 5, 2026	9.99	9.99	9.99	9.99	0.00%	0
May 4, 2026	9.99	9.99	9.99	9.99	0.00%	0
May 1, 2026	9.99	9.99	9.99	9.99	0.00%	0
Apr 30, 2026	9.99	9.99	9.99	9.99	0.00%	0
Apr 29, 2026	10.02	10.02	9.99	9.99	-0.20%	2.30K
Apr 28, 2026	10.01	10.01	10.01	10.01	0.00%	0
Apr 27, 2026	10.01	10.01	10.01	10.01	0.00%	0
Apr 24, 2026	10.01	10.01	10.01	10.01	0.00%	0
Apr 23, 2026	10.01	10.01	10.01	10.01	+0.10%	400.20K
Apr 22, 2026	10.00	10.00	10.00	10.00	-0.20%	200
Apr 21, 2026	10.02	10.02	10.02	10.02	+0.10%	100.00K
Apr 20, 2026	10.01	10.01	10.01	10.01	0.00%	0
Apr 17, 2026	10.01	10.01	10.01	10.01	0.00%	0
Apr 16, 2026	10.01	10.01	10.01	10.01	0.00%	0
Apr 15, 2026	10.00	10.02	9.99	10.01	+0.20%	20.20K
Apr 14, 2026	9.99	9.99	9.99	9.99	0.00%	0
Apr 13, 2026	9.99	9.99	9.99	9.99	0.00%	0
Apr 10, 2026	9.99	9.99	9.99	9.99	-0.10%	300
Apr 9, 2026	10.00	10.00	10.00	10.00	0.00%	0
Apr 8, 2026	10.00	10.00	10.00	10.00	0.00%	0
Apr 7, 2026	10.00	10.00	10.00	10.00	0.00%	0
Apr 6, 2026	10.00	10.00	10.00	10.00	0.00%	0
Apr 2, 2026	10.00	10.00	10.00	10.00	-0.20%	2.10K
Apr 1, 2026	10.00	10.02	10.00	10.02	+0.20%	5.20K
Mar 31, 2026	10.00	10.01	10.00	10.00	0.00%	200.00K
Mar 30, 2026	10.00	10.00	10.00	10.00	-0.30%	30.80K
Mar 27, 2026	10.03	10.03	10.03	10.03	0.00%	0
Mar 26, 2026	10.02	10.03	10.02	10.03	-0.10%	300
Mar 25, 2026	10.04	10.04	10.04	10.04	0.00%	0
Mar 24, 2026	10.03	10.04	9.99	10.04	+0.10%	3.30K
Mar 23, 2026	10.03	10.03	10.03	10.03	0.00%	0
Mar 20, 2026	10.03	10.03	10.03	10.03	0.00%	0
Mar 19, 2026	10.03	10.03	10.03	10.03	0.00%	100
Mar 18, 2026	10.03	10.03	10.03	10.03	+0.10%	100
Mar 17, 2026	10.10	10.10	10.02	10.02	-0.20%	400
Mar 16, 2026	10.04	10.04	10.04	10.04	+0.30%	100
Mar 13, 2026	10.01	10.01	10.01	10.01	-0.20%	300
Mar 12, 2026	10.03	10.03	10.03	10.03	+0.15%	100
Mar 11, 2026	10.03	10.03	10.02	10.02	-0.15%	300
Mar 10, 2026	10.03	10.03	10.03	10.03	0.00%	100
Mar 9, 2026	10.03	10.03	10.03	10.03	-0.10%	100
Mar 6, 2026	10.04	10.04	10.04	10.04	0.00%	0
Mar 5, 2026	10.01	10.04	10.01	10.04	0.00%	1.60K
Mar 4, 2026	10.04	10.04	10.04	10.04	0.00%	0
Mar 3, 2026	10.05	10.05	10.03	10.04	+0.07%	61.20K
Mar 2, 2026	10.05	10.05	10.03	10.03	-0.02%	1.80K
Feb 27, 2026	10.05	10.05	10.04	10.04	-0.10%	6.20K
Feb 26, 2026	10.05	10.05	10.05	10.05	+0.05%	300
Feb 25, 2026	10.04	10.04	10.04	10.04	0.00%	0
Feb 24, 2026	10.05	10.05	10.04	10.04	-0.05%	34.90K
Feb 23, 2026	10.05	10.05	10.04	10.05	0.00%	323.10K
Feb 20, 2026	10.04	10.05	10.04	10.05	+0.15%	30.40K
Feb 19, 2026	10.03	10.03	10.03	10.03	-0.20%	700
Feb 18, 2026	10.05	10.05	10.05	10.05	0.00%	21.50K
Feb 17, 2026	10.05	10.07	10.05	10.05	0.00%	232.20K
Feb 13, 2026	10.05	10.05	10.05	10.05	-0.05%	900
Feb 12, 2026	10.06	10.06	10.05	10.06	-0.05%	105.60K
Feb 11, 2026	10.06	10.06	10.06	10.06	-0.10%	5.80K
Feb 10, 2026	10.07	10.07	10.06	10.07	+0.20%	11.20K
Feb 9, 2026	10.05	10.05	10.05	10.05	0.00%	800
Feb 6, 2026	10.05	10.05	10.05	10.05	-0.50%	400
Feb 5, 2026	10.10	10.11	10.10	10.10	0.00%	12.60K
Feb 4, 2026	10.11	10.11	10.10	10.10	0.00%	26.40K
Feb 3, 2026	10.11	10.11	10.10	10.10	-0.49%	8.20K
Feb 2, 2026	10.10	10.15	10.10	10.15	+0.50%	71.00K
Jan 30, 2026	10.10	10.10	10.10	10.10	0.00%	0
Jan 29, 2026	10.10	10.10	10.10	10.10	+0.10%	400
Jan 28, 2026	10.10	10.15	10.09	10.09	-0.10%	102.20K
Jan 27, 2026	10.09	10.11	10.07	10.10	+0.30%	203.20K
Jan 26, 2026	10.10	10.13	10.07	10.07	-0.59%	227.80K
Jan 23, 2026	10.04	10.14	10.03	10.13	—	7.57M

Prices are adjusted for stock splits. See adjusted closing price for how dividends and splits affect history, and the ARCIU chart for longer ranges.