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 — 1991

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1991-12-31$3.05$3.054,525
1991-12-30$2.86$2.8638,067
1991-12-27$3.10$3.1033,275
1991-12-26$3.01$3.017,986
1991-12-24$2.91$2.9110,116
1991-12-23$3.01$3.015,324
1991-12-20$3.01$3.0128,750
1991-12-19$2.91$2.9111,979
1991-12-18$2.82$2.828,518
1991-12-17$2.91$2.9112,511
1991-12-16$2.91$2.9116,238
1991-12-13$2.91$2.9134,872
1991-12-12$2.72$2.7241,261
1991-12-11$2.82$2.8223,159
1991-12-10$2.68$2.6867,349
1991-12-09$2.44$2.4413,842
1991-12-06$2.49$2.49166,375
1991-12-05$2.54$2.5431,944
1991-12-04$2.54$2.5436,736
1991-12-03$2.49$2.4921,296
1991-12-02$2.44$2.4428,217
1991-11-29$2.44$2.4425,023
1991-11-27$2.39$2.396,655
1991-11-26$2.39$2.3947,117
1991-11-25$2.35$2.3530,081
1991-11-22$2.35$2.35799
1991-11-21$2.44$2.440
1991-11-20$2.44$2.445,324
1991-11-19$2.49$2.492,662
1991-11-18$2.39$2.396,655
1991-11-15$2.49$2.49799
1991-11-14$2.49$2.498,785
1991-11-13$2.44$2.44124,582
1991-11-12$2.44$2.4430,613
1991-11-11$2.44$2.4427,951
1991-11-08$2.49$2.4975,867
1991-11-07$2.35$2.355,058
1991-11-06$2.35$2.3521,562
1991-11-05$2.49$2.495,324
1991-11-04$2.39$2.3917,569
1991-11-01$2.44$2.440
1991-10-31$2.44$2.442,662
1991-10-30$2.49$2.499,583
1991-10-29$2.49$2.496,123
1991-10-28$2.44$2.440
1991-10-25$2.44$2.44532
1991-10-24$2.49$2.492,130
1991-10-23$2.49$2.4911,979
1991-10-22$2.44$2.448,518
1991-10-21$2.44$2.441,331
1991-10-18$2.44$2.440
1991-10-17$2.44$2.44266
1991-10-16$2.49$2.495,856
1991-10-15$2.54$2.5417,835
1991-10-14$2.49$2.4915,972
1991-10-11$2.44$2.442,662
1991-10-10$2.49$2.492,928
1991-10-09$2.49$2.49173,030
1991-10-08$2.44$2.4414,641
1991-10-07$2.49$2.4913,044
1991-10-04$2.54$2.540
1991-10-03$2.54$2.54799
1991-10-02$2.49$2.4918,634
1991-10-01$2.44$2.44532
1991-09-30$2.49$2.495,324
1991-09-27$2.49$2.491,331
1991-09-26$2.54$2.540
1991-09-25$2.54$2.5470,543
1991-09-24$2.44$2.442,396
1991-09-23$2.49$2.4923,958
1991-09-20$2.44$2.44266
1991-09-19$2.54$2.54532
1991-09-18$2.54$2.540
1991-09-17$2.54$2.544,525
1991-09-16$2.44$2.4430,081
1991-09-13$2.54$2.541,863
1991-09-12$2.44$2.4410,116
1991-09-11$2.49$2.495,324
1991-09-10$2.49$2.4910,648
1991-09-09$2.54$2.540
1991-09-06$2.54$2.544,259
1991-09-05$2.54$2.5458,830
1991-09-04$2.49$2.4925,289
1991-09-03$2.35$2.356,123
1991-08-30$2.44$2.4438,333
1991-08-29$2.44$2.4425,289
1991-08-28$2.35$2.351,597
1991-08-27$2.44$2.442,662
1991-08-26$2.35$2.352,662
1991-08-23$2.35$2.353,194
1991-08-22$2.35$2.356,655
1991-08-21$2.30$2.3022,095
1991-08-20$2.44$2.440
1991-08-19$2.44$2.440
1991-08-16$2.44$2.442,396
1991-08-15$2.39$2.392,662
1991-08-14$2.35$2.35170,368
1991-08-13$2.35$2.3522,627
1991-08-12$2.39$2.3956,701
1991-08-09$2.39$2.392,662
1991-08-08$2.44$2.447,986
1991-08-07$2.44$2.4429,016
1991-08-06$2.39$2.390
1991-08-05$2.39$2.397,986
1991-08-02$2.35$2.3581,191
1991-08-01$2.35$2.352,662
1991-07-31$2.25$2.253,727
1991-07-30$2.25$2.2526,620
1991-07-29$2.35$2.350
1991-07-26$2.35$2.351,863
1991-07-25$2.35$2.351,331
1991-07-24$2.25$2.2515,972
1991-07-23$2.16$2.160
1991-07-22$2.16$2.1629,282
1991-07-19$2.25$2.2511,713
1991-07-18$2.25$2.258,252
1991-07-17$2.25$2.2523,692
1991-07-16$2.21$2.210
1991-07-15$2.21$2.2123,426
1991-07-12$2.25$2.252,662
1991-07-11$2.21$2.2115,173
1991-07-10$2.25$2.252,396
1991-07-09$2.25$2.2511,979
1991-07-08$2.16$2.163,194
1991-07-05$2.25$2.252,662
1991-07-03$2.25$2.2519,699
1991-07-02$2.16$2.16532
1991-07-01$2.16$2.166,389
1991-06-28$2.07$2.071,065
1991-06-27$2.35$2.3517,037
1991-06-26$2.21$2.2119,965
1991-06-25$2.30$2.3012,778
1991-06-24$2.35$2.350
1991-06-21$2.35$2.351,331
1991-06-20$2.35$2.353,461
1991-06-19$2.35$2.351,065
1991-06-18$2.21$2.212,396
1991-06-17$2.21$2.21799
1991-06-14$2.21$2.21532
1991-06-13$2.35$2.35266
1991-06-12$2.25$2.2519,166
1991-06-11$2.25$2.251,331
1991-06-10$2.25$2.250
1991-06-07$2.25$2.251,331
1991-06-06$2.35$2.351,065
1991-06-05$2.25$2.252,928
1991-06-04$2.25$2.251,863
1991-06-03$2.39$2.391,331
1991-05-31$2.25$2.25532
1991-05-30$2.39$2.39266
1991-05-29$2.35$2.3518,900
1991-05-28$2.39$2.391,331
1991-05-24$2.25$2.25532
1991-05-23$2.39$2.39266
1991-05-22$2.39$2.39266
1991-05-21$2.25$2.250
1991-05-20$2.25$2.250
1991-05-17$2.25$2.252,662
1991-05-16$2.39$2.39532
1991-05-15$2.21$2.212,662
1991-05-14$2.25$2.25266
1991-05-13$2.39$2.392,130
1991-05-10$2.25$2.25266
1991-05-09$2.39$2.391,331
1991-05-08$2.25$2.25218,550
1991-05-07$2.49$2.491,863
1991-05-06$2.49$2.49266
1991-05-03$2.49$2.490
1991-05-02$2.49$2.49266
1991-05-01$2.39$2.3925,555
1991-04-30$2.35$2.350
1991-04-29$2.35$2.35532
1991-04-26$2.35$2.356,389
1991-04-25$2.54$2.543,461
1991-04-24$2.39$2.3970,277
1991-04-23$2.54$2.542,662
1991-04-22$2.35$2.352,662
1991-04-19$2.44$2.441,863
1991-04-18$2.54$2.5413,044
1991-04-17$2.49$2.499,051
1991-04-16$2.35$2.3514,907
1991-04-15$2.39$2.390
1991-04-12$2.39$2.396,921
1991-04-11$2.44$2.44532
1991-04-10$2.44$2.449,317
1991-04-09$2.39$2.392,662
1991-04-08$2.49$2.498,518
1991-04-05$2.44$2.4422,893
1991-04-04$2.35$2.352,662
1991-04-03$2.44$2.442,662
1991-04-02$2.30$2.30266
1991-04-01$2.39$2.394,792
1991-03-28$2.39$2.395,856
1991-03-27$2.44$2.441,597
1991-03-26$2.35$2.3513,310
1991-03-25$2.44$2.4417,037
1991-03-22$2.35$2.350
1991-03-21$2.35$2.3512,245
1991-03-20$2.35$2.350
1991-03-19$2.35$2.350
1991-03-18$2.35$2.3520,497
1991-03-15$2.25$2.250
1991-03-14$2.25$2.255,324
1991-03-13$2.44$2.4416,771
1991-03-12$2.16$2.160
1991-03-11$2.16$2.166,655
1991-03-08$2.35$2.350
1991-03-07$2.35$2.355,856
1991-03-06$2.16$2.1619,166
1991-03-05$2.11$2.111,331
1991-03-04$2.07$2.072,662
1991-03-01$1.97$1.97266
1991-02-28$2.11$2.119,317
1991-02-27$2.02$2.023,993
1991-02-26$2.16$2.1622,627
1991-02-25$2.16$2.1651,110
1991-02-22$2.11$2.1168,147
1991-02-21$1.93$1.933,727
1991-02-20$1.93$1.93532
1991-02-19$1.78$1.780
1991-02-15$1.78$1.788,252
1991-02-14$1.88$1.8812,778
1991-02-13$1.88$1.880
1991-02-12$1.88$1.8811,979
1991-02-11$1.88$1.880
1991-02-08$1.88$1.886,389
1991-02-07$1.88$1.885,590
1991-02-06$1.78$1.785,324
1991-02-05$1.88$1.8816,238
1991-02-04$1.88$1.88799
1991-02-01$1.88$1.8817,569
1991-01-31$1.88$1.8877,198
1991-01-30$1.88$1.887,986
1991-01-29$1.88$1.880
1991-01-28$1.88$1.8841,793
1991-01-25$1.88$1.880
1991-01-24$1.88$1.882,396
1991-01-23$1.88$1.880
1991-01-22$1.88$1.889,583
1991-01-21$1.74$1.7417,303
1991-01-18$1.88$1.885,324
1991-01-17$1.88$1.8830,081
1991-01-16$1.69$1.69266
1991-01-15$1.78$1.7815,173
1991-01-14$1.78$1.781,863
1991-01-11$1.97$1.97799
1991-01-10$1.97$1.971,065
1991-01-09$1.97$1.971,065
1991-01-08$1.83$1.8335,937
1991-01-07$1.88$1.8823,426
1991-01-04$1.93$1.9346,585
1991-01-03$1.93$1.9321,562
1991-01-02$1.93$1.9329,548