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 — 1990

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1990-12-31$1.97$1.9783,321
1990-12-28$1.93$1.9312,245
1990-12-27$2.02$2.02799
1990-12-26$1.93$1.93266
1990-12-24$1.93$1.930
1990-12-21$1.93$1.931,597
1990-12-20$2.02$2.028,518
1990-12-19$2.02$2.0215,972
1990-12-18$2.02$2.0210,382
1990-12-17$1.93$1.930
1990-12-14$1.93$1.9351,643
1990-12-13$1.93$1.9324,224
1990-12-12$1.97$1.970
1990-12-11$1.97$1.9735,671
1990-12-10$1.93$1.9329,016
1990-12-07$1.97$1.972,662
1990-12-06$1.97$1.972,662
1990-12-05$1.97$1.9744,722
1990-12-04$2.02$2.0213,044
1990-12-03$1.93$1.933,194
1990-11-30$2.02$2.0221,562
1990-11-29$2.02$2.0219,433
1990-11-28$1.93$1.931,065
1990-11-27$2.02$2.025,324
1990-11-26$1.93$1.93266
1990-11-23$1.93$1.931,331
1990-11-21$2.07$2.07266
1990-11-20$1.93$1.931,597
1990-11-19$1.97$1.9717,569
1990-11-16$1.93$1.9315,972
1990-11-15$2.07$2.07266
1990-11-14$2.07$2.075,324
1990-11-13$1.93$1.935,058
1990-11-12$2.07$2.07532
1990-11-09$2.07$2.070
1990-11-08$2.07$2.0735,138
1990-11-07$1.97$1.9743,923
1990-11-06$1.97$1.9710,382
1990-11-05$1.97$1.9717,037
1990-11-02$2.07$2.070
1990-11-01$2.07$2.07532
1990-10-31$2.07$2.0745,254
1990-10-30$1.88$1.881,331
1990-10-29$1.88$1.882,662
1990-10-26$2.07$2.070
1990-10-25$2.07$2.07266
1990-10-24$1.93$1.930
1990-10-23$1.93$1.930
1990-10-22$1.93$1.933,461
1990-10-19$1.88$1.881,331
1990-10-18$2.07$2.07266
1990-10-17$2.07$2.0734,872
1990-10-16$2.02$2.0222,893
1990-10-15$1.97$1.978,252
1990-10-12$1.97$1.9728,483
1990-10-11$1.97$1.975,856
1990-10-10$1.93$1.931,065
1990-10-09$1.97$1.9740,196
1990-10-08$1.93$1.930
1990-10-05$1.93$1.93532
1990-10-04$2.07$2.074,525
1990-10-03$2.02$2.025,590
1990-10-02$2.02$2.025,324
1990-10-01$1.97$1.977,986
1990-09-28$2.02$2.024,259
1990-09-27$1.97$1.975,590
1990-09-26$2.07$2.070
1990-09-25$2.07$2.070
1990-09-24$2.07$2.0718,634
1990-09-21$2.16$2.169,583
1990-09-20$2.35$2.355,590
1990-09-19$2.35$2.350
1990-09-18$2.35$2.3518,368
1990-09-17$2.21$2.2172,673
1990-09-14$2.35$2.3531,678
1990-09-13$2.39$2.3913,310
1990-09-12$2.44$2.4450,844
1990-09-11$2.16$2.169,317
1990-09-10$2.25$2.250
1990-09-07$2.25$2.2533,541
1990-09-06$2.35$2.350
1990-09-05$2.35$2.3530,879
1990-09-04$2.07$2.0711,979
1990-08-31$2.07$2.070
1990-08-30$2.07$2.075,590
1990-08-29$2.07$2.0724,490
1990-08-28$2.07$2.072,928
1990-08-27$1.93$1.9313,576
1990-08-24$1.88$1.8817,569
1990-08-23$1.93$1.9367,349
1990-08-22$1.93$1.9335,937
1990-08-21$1.88$1.88532
1990-08-20$2.07$2.075,590
1990-08-17$1.88$1.8811,447
1990-08-16$2.07$2.07266
1990-08-15$2.07$2.07266
1990-08-14$1.88$1.880
1990-08-13$1.88$1.881,065
1990-08-10$2.07$2.071,597
1990-08-09$2.07$2.075,590
1990-08-08$1.93$1.9318,102
1990-08-07$1.88$1.888,252
1990-08-06$1.93$1.934,259
1990-08-03$1.97$1.9711,979
1990-08-02$2.07$2.0713,576
1990-08-01$1.88$1.883,194
1990-07-31$1.88$1.8812,511
1990-07-30$1.97$1.9727,419
1990-07-27$1.97$1.9717,303
1990-07-26$2.07$2.07799
1990-07-25$2.02$2.026,655
1990-07-24$1.97$1.973,194
1990-07-23$2.07$2.0738,333
1990-07-20$1.97$1.9715,440
1990-07-19$2.16$2.16532
1990-07-18$2.07$2.070
1990-07-17$2.07$2.074,792
1990-07-16$2.07$2.070
1990-07-13$2.07$2.0715,972
1990-07-12$2.21$2.21266
1990-07-11$2.07$2.0719,433
1990-07-10$2.07$2.07266
1990-07-09$2.21$2.210
1990-07-06$2.21$2.213,194
1990-07-05$2.21$2.21266
1990-07-03$2.16$2.161,863
1990-07-02$2.11$2.115,590
1990-06-29$2.11$2.1126,886
1990-06-28$2.21$2.211,065
1990-06-27$2.11$2.1113,842
1990-06-26$2.21$2.2117,835
1990-06-25$2.25$2.255,856
1990-06-22$2.21$2.2113,842
1990-06-21$2.21$2.21110,473
1990-06-20$2.16$2.160
1990-06-19$2.16$2.1642,060
1990-06-18$2.11$2.1183,587
1990-06-15$2.49$2.4911,180
1990-06-14$2.58$2.5872,406
1990-06-13$2.54$2.547,986
1990-06-12$2.54$2.542,662
1990-06-11$2.49$2.4935,671
1990-06-08$2.44$2.4437,002
1990-06-07$2.58$2.5810,382
1990-06-06$2.54$2.5421,030
1990-06-05$2.35$2.35143,748
1990-06-04$2.21$2.210
1990-06-01$2.21$2.211,597
1990-05-31$2.16$2.160
1990-05-30$2.16$2.160
1990-05-29$2.16$2.168,785
1990-05-25$2.30$2.301,331
1990-05-24$2.39$2.397,986
1990-05-23$2.30$2.3017,835
1990-05-22$2.25$2.256,123
1990-05-21$2.54$2.540
1990-05-18$2.54$2.54532
1990-05-17$2.54$2.541,597
1990-05-16$2.54$2.541,331
1990-05-15$2.35$2.356,123
1990-05-14$2.25$2.253,194
1990-05-11$2.35$2.3544,722
1990-05-10$2.35$2.351,331
1990-05-09$2.35$2.355,324
1990-05-08$2.25$2.250
1990-05-07$2.25$2.250
1990-05-04$2.25$2.258,252
1990-05-03$2.54$2.54266
1990-05-02$2.35$2.350
1990-05-01$2.35$2.358,518
1990-04-30$2.39$2.390
1990-04-27$2.39$2.393,993
1990-04-26$2.54$2.54532
1990-04-25$2.35$2.35266
1990-04-24$2.54$2.542,662
1990-04-23$2.49$2.490
1990-04-20$2.49$2.492,396
1990-04-19$2.63$2.63266
1990-04-18$2.63$2.631,597
1990-04-17$2.44$2.442,130
1990-04-16$2.49$2.49146,410
1990-04-12$2.58$2.582,662
1990-04-11$2.54$2.5458,298
1990-04-10$2.54$2.543,993
1990-04-09$2.54$2.544,525
1990-04-06$2.54$2.542,662
1990-04-05$2.63$2.6328,483
1990-04-04$2.63$2.630
1990-04-03$2.63$2.636,655
1990-04-02$2.54$2.542,662
1990-03-30$2.63$2.630
1990-03-29$2.63$2.632,130
1990-03-28$2.54$2.540
1990-03-27$2.54$2.54532
1990-03-26$2.54$2.540
1990-03-23$2.54$2.541,331
1990-03-22$2.63$2.63799
1990-03-21$2.63$2.632,928
1990-03-20$2.63$2.63138,956
1990-03-19$2.54$2.5472,140
1990-03-16$2.77$2.7717,037
1990-03-15$2.72$2.7210,116
1990-03-14$2.63$2.6351,909
1990-03-13$2.54$2.5411,447
1990-03-12$2.44$2.4412,511
1990-03-09$2.35$2.3522,361
1990-03-08$2.30$2.3022,627
1990-03-07$2.21$2.2163,622
1990-03-06$2.16$2.1632,743
1990-03-05$2.30$2.3011,180
1990-03-02$2.30$2.302,662
1990-03-01$2.35$2.354,792
1990-02-28$2.25$2.2521,828
1990-02-27$2.25$2.255,590
1990-02-26$2.25$2.25685,465
1990-02-23$2.16$2.16173,030
1990-02-22$2.25$2.25266
1990-02-21$2.16$2.160
1990-02-20$2.16$2.1610,382
1990-02-16$2.16$2.1627,951
1990-02-15$2.25$2.252,662
1990-02-14$2.25$2.250
1990-02-13$2.25$2.252,662
1990-02-12$2.16$2.16532
1990-02-09$2.16$2.1619,965
1990-02-08$2.35$2.354,259
1990-02-07$2.16$2.161,065
1990-02-06$2.35$2.350
1990-02-05$2.35$2.35532
1990-02-02$2.35$2.350
1990-02-01$2.35$2.351,065
1990-01-31$2.35$2.3585,450
1990-01-30$2.07$2.07799
1990-01-29$2.07$2.0742,060
1990-01-26$2.16$2.162,662
1990-01-25$2.21$2.216,655
1990-01-24$2.11$2.1126,886
1990-01-23$2.16$2.1628,483
1990-01-22$2.07$2.0718,102
1990-01-19$2.07$2.0711,713
1990-01-18$2.25$2.25266
1990-01-17$2.25$2.250
1990-01-16$2.25$2.250
1990-01-15$2.25$2.250
1990-01-12$2.25$2.25532
1990-01-11$2.35$2.35532
1990-01-10$2.16$2.160
1990-01-09$2.16$2.160
1990-01-08$2.16$2.161,597
1990-01-05$2.35$2.3526,620
1990-01-04$2.35$2.35266
1990-01-03$2.16$2.162,662
1990-01-02$2.16$2.1626,620