NASDAQ:CSPI | Historical Stock Price | CSP INC /MA/

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
1982-01-29 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$1.18$2.32$4.56$8.97$17.61$34.601982-01-292026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

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Historical Stock Price — 1986

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1986-12-31$2.16$2.1675,335
1986-12-30$2.07$2.0737,268
1986-12-29$2.35$2.3590,774
1986-12-26$2.30$2.3033,807
1986-12-24$2.30$2.303,727
1986-12-23$2.35$2.3546,053
1986-12-22$2.35$2.355,324
1986-12-19$2.35$2.357,720
1986-12-18$2.39$2.3910,382
1986-12-17$2.39$2.399,849
1986-12-16$2.39$2.394,525
1986-12-15$2.44$2.4427,152
1986-12-12$2.39$2.3924,490
1986-12-11$2.35$2.356,389
1986-12-10$2.39$2.395,324
1986-12-09$2.35$2.3514,375
1986-12-08$2.35$2.355,856
1986-12-05$2.35$2.353,461
1986-12-04$2.35$2.3513,310
1986-12-03$2.44$2.4444,455
1986-12-02$2.30$2.305,590
1986-12-01$2.39$2.3917,037
1986-11-28$2.35$2.3514,375
1986-11-26$2.30$2.3021,296
1986-11-25$2.35$2.3516,771
1986-11-24$2.39$2.3922,893
1986-11-21$2.30$2.3021,828
1986-11-20$2.30$2.305,324
1986-11-19$2.30$2.3011,180
1986-11-18$2.30$2.3059,895
1986-11-17$2.35$2.3513,576
1986-11-14$2.39$2.3924,757
1986-11-13$2.39$2.3959,096
1986-11-12$2.35$2.3514,641
1986-11-11$2.39$2.3915,706
1986-11-10$2.30$2.3032,743
1986-11-07$2.30$2.307,187
1986-11-06$2.25$2.2516,771
1986-11-05$2.25$2.2544,988
1986-11-04$2.25$2.2510,648
1986-11-03$2.30$2.3060,161
1986-10-31$2.25$2.25161,051
1986-10-30$2.16$2.1673,205
1986-10-29$2.07$2.0726,620
1986-10-28$2.11$2.111,597
1986-10-27$2.11$2.1152,708
1986-10-24$2.11$2.1118,102
1986-10-23$2.11$2.1113,044
1986-10-22$2.16$2.1629,814
1986-10-21$2.11$2.114,525
1986-10-20$2.16$2.1617,835
1986-10-17$2.16$2.165,058
1986-10-16$2.16$2.1614,641
1986-10-15$2.16$2.1648,715
1986-10-14$2.11$2.1145,520
1986-10-13$2.07$2.07266
1986-10-10$2.11$2.1153,506
1986-10-09$2.25$2.25125,646
1986-10-08$2.07$2.074,259
1986-10-07$2.07$2.0735,405
1986-10-06$2.02$2.0215,173
1986-10-03$1.97$1.978,518
1986-10-02$2.02$2.0234,606
1986-10-01$1.97$1.973,194
1986-09-30$2.07$2.0714,375
1986-09-29$2.02$2.0213,842
1986-09-26$2.02$2.0213,842
1986-09-25$1.93$1.937,986
1986-09-24$1.93$1.934,525
1986-09-23$1.97$1.976,921
1986-09-22$2.07$2.070
1986-09-19$2.07$2.0715,972
1986-09-18$2.02$2.0220,764
1986-09-17$1.97$1.973,993
1986-09-16$2.02$2.0220,231
1986-09-15$1.97$1.9720,764
1986-09-12$2.07$2.0724,490
1986-09-11$1.97$1.9719,965
1986-09-10$2.02$2.0211,979
1986-09-09$2.02$2.027,986
1986-09-08$1.97$1.9752,708
1986-09-05$2.07$2.07260,077
1986-09-04$2.07$2.0719,433
1986-09-03$2.07$2.0724,490
1986-09-02$2.02$2.0233,009
1986-08-29$1.97$1.9749,779
1986-08-28$2.07$2.0715,972
1986-08-27$2.11$2.1129,282
1986-08-26$2.25$2.256,921
1986-08-25$2.21$2.2117,835
1986-08-22$2.25$2.2529,016
1986-08-21$2.21$2.2116,504
1986-08-20$2.16$2.167,454
1986-08-19$2.16$2.1619,433
1986-08-18$2.16$2.1617,569
1986-08-15$2.16$2.1697,695
1986-08-14$2.21$2.2119,699
1986-08-13$2.21$2.2165,485
1986-08-12$2.25$2.2519,699
1986-08-11$2.30$2.306,123
1986-08-08$2.21$2.21159,454
1986-08-07$2.30$2.3034,872
1986-08-06$2.11$2.1140,462
1986-08-05$2.21$2.21117,128
1986-08-04$2.16$2.1627,685
1986-08-01$2.21$2.2127,951
1986-07-31$2.02$2.023,461
1986-07-30$2.16$2.1611,979
1986-07-29$2.07$2.0728,217
1986-07-28$2.02$2.0251,909
1986-07-25$1.88$1.8851,110
1986-07-24$2.16$2.1680,392
1986-07-23$2.25$2.257,986
1986-07-22$2.35$2.3512,245
1986-07-21$2.35$2.3545,520
1986-07-18$2.39$2.3987,047
1986-07-17$2.54$2.5433,541
1986-07-16$2.58$2.5859,096
1986-07-15$2.58$2.5858,564
1986-07-14$2.58$2.5823,958
1986-07-11$2.58$2.5813,310
1986-07-10$2.49$2.4976,399
1986-07-09$2.58$2.5843,923
1986-07-08$2.58$2.5830,081
1986-07-07$2.58$2.583,727
1986-07-03$2.63$2.6310,648
1986-07-02$2.54$2.5454,571
1986-07-01$2.49$2.49159,720
1986-06-30$2.25$2.25101,422
1986-06-27$2.21$2.2184,652
1986-06-26$2.30$2.30129,906
1986-06-25$2.49$2.49199,650
1986-06-24$2.58$2.58148,540
1986-06-23$3.15$3.1558,830
1986-06-20$3.10$3.1012,245
1986-06-19$3.10$3.1037,002
1986-06-18$3.10$3.1086,781
1986-06-17$3.29$3.2926,886
1986-06-16$3.29$3.2917,569
1986-06-13$3.43$3.4311,713
1986-06-12$3.29$3.2991,307
1986-06-11$3.43$3.4330,613
1986-06-10$3.43$3.4331,145
1986-06-09$3.43$3.4351,377
1986-06-06$3.38$3.388,785
1986-06-05$3.47$3.4762,557
1986-06-04$3.38$3.38108,343
1986-06-03$3.38$3.3883,321
1986-06-02$3.43$3.4337,800
1986-05-30$3.57$3.57131,503
1986-05-29$3.43$3.43444,820
1986-05-28$3.10$3.10241,710
1986-05-27$3.38$3.3854,837
1986-05-23$3.43$3.43162,382
1986-05-22$3.38$3.38260,610
1986-05-21$3.76$3.76179,419
1986-05-20$3.85$3.85239,846
1986-05-19$4.04$4.04222,809
1986-05-16$4.84$4.8439,930
1986-05-15$4.79$4.7913,310
1986-05-14$4.88$4.8836,203
1986-05-13$4.79$4.7921,030
1986-05-12$4.88$4.888,518
1986-05-09$4.84$4.8420,764
1986-05-08$4.88$4.888,785
1986-05-07$4.84$4.8421,562
1986-05-06$4.88$4.888,252
1986-05-05$4.98$4.9814,109
1986-05-02$4.93$4.9331,412
1986-05-01$4.70$4.7095,832
1986-04-30$4.98$4.9862,823
1986-04-29$5.17$5.1774,802
1986-04-28$5.21$5.2128,750
1986-04-25$5.31$5.3176,932
1986-04-24$5.17$5.1724,490
1986-04-23$5.07$5.0751,110
1986-04-22$5.26$5.26117,128
1986-04-21$4.93$4.9330,879
1986-04-18$4.93$4.93123,517
1986-04-17$4.98$4.98193,794
1986-04-16$4.41$4.4132,743
1986-04-15$4.41$4.4161,226
1986-04-14$4.46$4.4641,793
1986-04-11$4.46$4.4629,814
1986-04-10$4.65$4.6523,426
1986-04-09$4.55$4.5570,277
1986-04-08$4.37$4.379,583
1986-04-07$4.51$4.5168,946
1986-04-04$4.46$4.4629,282
1986-04-03$4.46$4.4642,326
1986-04-02$4.46$4.4631,145
1986-04-01$4.46$4.4617,835
1986-03-31$4.46$4.4615,706
1986-03-27$4.51$4.5161,226
1986-03-26$4.51$4.5114,109
1986-03-25$4.37$4.3724,224
1986-03-24$4.32$4.3234,606
1986-03-21$4.51$4.51103,286
1986-03-20$4.74$4.74204,175
1986-03-19$4.41$4.41338,606
1986-03-18$4.04$4.04115,797
1986-03-17$4.41$4.4197,962
1986-03-14$4.55$4.55183,146
1986-03-13$4.65$4.6519,699
1986-03-12$4.60$4.60115,797
1986-03-11$4.60$4.6034,074
1986-03-10$4.41$4.4186,249
1986-03-07$4.55$4.55103,019
1986-03-06$4.84$4.845,590
1986-03-05$4.79$4.7990,242
1986-03-04$4.84$4.8420,497
1986-03-03$4.79$4.7947,650
1986-02-28$5.02$5.02116,596
1986-02-27$4.98$4.9819,965
1986-02-26$4.88$4.8828,483
1986-02-25$4.98$4.9813,044
1986-02-24$5.07$5.0761,492
1986-02-21$5.17$5.1738,333
1986-02-20$5.12$5.1227,152
1986-02-19$5.17$5.17113,667
1986-02-18$4.88$4.8841,527
1986-02-14$4.88$4.8884,918
1986-02-13$4.74$4.7451,110
1986-02-12$4.79$4.796,389
1986-02-11$4.98$4.986,921
1986-02-10$4.98$4.9844,988
1986-02-07$4.98$4.9840,729
1986-02-06$4.98$4.9823,159
1986-02-05$5.02$5.0216,238
1986-02-04$4.88$4.8812,245
1986-02-03$5.02$5.0219,433
1986-01-31$5.02$5.02115,531
1986-01-30$5.12$5.1266,018
1986-01-29$5.21$5.21161,583
1986-01-28$5.17$5.17104,883
1986-01-27$4.79$4.7960,427
1986-01-24$4.70$4.7017,037
1986-01-23$4.70$4.7041,261
1986-01-22$4.79$4.79211,363
1986-01-21$4.60$4.60478,894
1986-01-20$4.41$4.41122,984
1986-01-17$4.27$4.2723,958
1986-01-16$4.32$4.3216,238
1986-01-15$4.37$4.3728,483
1986-01-14$4.41$4.41101,688
1986-01-13$4.51$4.5172,939
1986-01-10$4.41$4.4193,702
1986-01-09$4.51$4.5128,483
1986-01-08$4.51$4.5133,275
1986-01-07$4.51$4.51252,624
1986-01-06$4.55$4.5517,835
1986-01-03$4.51$4.5113,044
1986-01-02$4.55$4.5520,764