NASDAQ:SEIC | Historical Stock Price | SEI INVESTMENTS CO

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
1981-03-25 to 2026-09-04
Data captured

Stock Price Chart

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

$0.18$0.70$2.72$10.58$41.07$159.491981-03-252026-08-27

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

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Historical Stock Price — 1984

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1984-12-31$0.30$0.30504,000
1984-12-28$0.29$0.29168,000
1984-12-27$0.29$0.29153,600
1984-12-26$0.30$0.30297,600
1984-12-24$0.29$0.29278,400
1984-12-21$0.28$0.28139,200
1984-12-20$0.28$0.281,012,800
1984-12-19$0.28$0.28787,200
1984-12-18$0.28$0.28129,600
1984-12-17$0.28$0.283,100,800
1984-12-14$0.28$0.28110,400
1984-12-13$0.28$0.28331,200
1984-12-12$0.28$0.28273,600
1984-12-11$0.28$0.28297,600
1984-12-10$0.28$0.28379,200
1984-12-07$0.28$0.283,388,800
1984-12-06$0.28$0.28134,400
1984-12-05$0.28$0.28499,200
1984-12-04$0.28$0.2867,200
1984-12-03$0.29$0.291,065,600
1984-11-30$0.29$0.292,064,000
1984-11-29$0.29$0.29148,800
1984-11-28$0.29$0.29633,600
1984-11-27$0.29$0.291,444,800
1984-11-26$0.29$0.291,747,200
1984-11-23$0.28$0.2843,200
1984-11-21$0.28$0.28110,400
1984-11-20$0.28$0.2867,200
1984-11-19$0.28$0.28508,800
1984-11-16$0.27$0.27259,200
1984-11-15$0.28$0.28326,400
1984-11-14$0.28$0.28120,000
1984-11-13$0.28$0.28259,200
1984-11-12$0.28$0.28321,600
1984-11-09$0.28$0.283,820,800
1984-11-08$0.28$0.283,820,800
1984-11-07$0.29$0.29480,000
1984-11-06$0.29$0.293,312,000
1984-11-05$0.27$0.271,344,000
1984-11-02$0.27$0.272,832,000
1984-11-01$0.28$0.28964,800
1984-10-31$0.28$0.28259,200
1984-10-30$0.28$0.282,491,200
1984-10-29$0.27$0.271,185,600
1984-10-26$0.28$0.28364,800
1984-10-25$0.28$0.28705,600
1984-10-24$0.26$0.26801,600
1984-10-23$0.24$0.241,752,000
1984-10-22$0.24$0.24628,800
1984-10-19$0.24$0.241,732,800
1984-10-18$0.24$0.24312,000
1984-10-17$0.24$0.241,502,400
1984-10-16$0.24$0.245,976,000
1984-10-15$0.24$0.24748,800
1984-10-12$0.24$0.241,766,400
1984-10-11$0.24$0.246,192,000
1984-10-10$0.23$0.231,224,000
1984-10-09$0.23$0.23216,000
1984-10-08$0.23$0.23268,800
1984-10-05$0.22$0.22124,800
1984-10-04$0.22$0.224,257,600
1984-10-03$0.22$0.221,560,000
1984-10-02$0.22$0.221,036,800
1984-10-01$0.22$0.221,281,600
1984-09-28$0.23$0.23307,200
1984-09-27$0.23$0.231,406,400
1984-09-26$0.23$0.231,214,400
1984-09-25$0.24$0.2411,640,000
1984-09-24$0.26$0.261,862,400
1984-09-21$0.26$0.26201,600
1984-09-20$0.26$0.261,324,800
1984-09-19$0.26$0.262,481,600
1984-09-18$0.27$0.27307,200
1984-09-17$0.27$0.27705,600
1984-09-14$0.28$0.28254,400
1984-09-13$0.28$0.28388,800
1984-09-12$0.28$0.2881,600
1984-09-11$0.28$0.2891,200
1984-09-10$0.28$0.28153,600
1984-09-07$0.29$0.29211,200
1984-09-06$0.29$0.2996,000
1984-09-05$0.29$0.2962,400
1984-09-04$0.30$0.30273,600
1984-08-31$0.30$0.30115,200
1984-08-30$0.31$0.31187,200
1984-08-29$0.31$0.31283,200
1984-08-28$0.32$0.327,180,800
1984-08-27$0.32$0.3276,800
1984-08-24$0.32$0.3228,800
1984-08-23$0.33$0.331,958,400
1984-08-22$0.33$0.33100,800
1984-08-21$0.33$0.33201,600
1984-08-20$0.33$0.33182,400
1984-08-17$0.33$0.33120,000
1984-08-16$0.34$0.34235,200
1984-08-15$0.34$0.34148,800
1984-08-14$0.34$0.3467,200
1984-08-13$0.34$0.34854,400
1984-08-10$0.35$0.35206,400
1984-08-09$0.34$0.344,632,000
1984-08-08$0.34$0.341,473,600
1984-08-07$0.34$0.341,243,200
1984-08-06$0.32$0.320
1984-08-03$0.32$0.322,020,800
1984-08-02$0.31$0.311,435,200
1984-08-01$0.29$0.293,508,800
1984-07-31$0.29$0.29230,400
1984-07-30$0.29$0.29264,000
1984-07-27$0.28$0.28508,800
1984-07-26$0.29$0.29110,400
1984-07-25$0.28$0.281,320,000
1984-07-24$0.28$0.281,070,400
1984-07-23$0.29$0.29460,800
1984-07-20$0.31$0.31710,400
1984-07-19$0.32$0.32441,600
1984-07-18$0.32$0.3257,600
1984-07-17$0.33$0.33182,400
1984-07-16$0.33$0.33624,000
1984-07-13$0.35$0.35168,000
1984-07-12$0.34$0.34556,800
1984-07-11$0.35$0.35696,000
1984-07-10$0.35$0.351,027,200
1984-07-09$0.34$0.34355,200
1984-07-06$0.35$0.351,435,200
1984-07-05$0.35$0.35950,400
1984-07-03$0.36$0.361,176,000
1984-07-02$0.32$0.321,392,000
1984-06-29$0.31$0.312,035,200
1984-06-28$0.30$0.30278,400
1984-06-27$0.30$0.302,553,600
1984-06-26$0.30$0.30374,400
1984-06-25$0.29$0.2976,800
1984-06-22$0.29$0.29153,600
1984-06-21$0.30$0.30129,600
1984-06-20$0.30$0.30672,000
1984-06-19$0.29$0.29787,200
1984-06-18$0.29$0.29489,600
1984-06-15$0.30$0.30873,600
1984-06-14$0.30$0.30158,400
1984-06-13$0.30$0.3062,400
1984-06-12$0.31$0.31393,600
1984-06-11$0.30$0.30168,000
1984-06-08$0.30$0.3024,000
1984-06-07$0.30$0.3086,400
1984-06-06$0.31$0.31744,000
1984-06-05$0.29$0.29134,400
1984-06-04$0.29$0.29259,200
1984-06-01$0.29$0.2981,600
1984-05-31$0.28$0.28163,200
1984-05-30$0.28$0.28532,800
1984-05-29$0.29$0.29120,000
1984-05-25$0.29$0.2928,800
1984-05-24$0.29$0.29139,200
1984-05-23$0.29$0.29172,800
1984-05-22$0.29$0.293,187,200
1984-05-21$0.30$0.30172,800
1984-05-18$0.28$0.28528,000
1984-05-17$0.29$0.293,225,600
1984-05-16$0.30$0.30244,800
1984-05-15$0.30$0.30105,600
1984-05-14$0.30$0.302,788,800
1984-05-11$0.30$0.30278,400
1984-05-10$0.31$0.317,459,200
1984-05-09$0.31$0.31120,000
1984-05-08$0.30$0.304,689,600
1984-05-07$0.30$0.30336,000
1984-05-04$0.30$0.30374,400
1984-05-03$0.29$0.292,438,400
1984-05-02$0.30$0.306,412,800
1984-05-01$0.27$0.271,305,600
1984-04-30$0.28$0.28225,600
1984-04-27$0.28$0.28350,400
1984-04-26$0.28$0.281,838,400
1984-04-25$0.27$0.272,577,600
1984-04-24$0.30$0.30216,000
1984-04-23$0.30$0.30705,600
1984-04-19$0.31$0.31259,200
1984-04-18$0.31$0.311,641,600
1984-04-17$0.32$0.32888,000
1984-04-16$0.32$0.32177,600
1984-04-13$0.33$0.33144,000
1984-04-12$0.33$0.33571,200
1984-04-11$0.31$0.31172,800
1984-04-10$0.31$0.31864,000
1984-04-09$0.32$0.32801,600
1984-04-06$0.32$0.322,774,400
1984-04-05$0.32$0.32259,200
1984-04-04$0.32$0.323,393,600
1984-04-03$0.31$0.312,683,200
1984-04-02$0.34$0.3496,000
1984-03-30$0.35$0.35816,000
1984-03-29$0.35$0.35614,400
1984-03-28$0.35$0.35124,800
1984-03-27$0.36$0.36124,800
1984-03-26$0.36$0.36139,200
1984-03-23$0.36$0.36196,800
1984-03-22$0.38$0.38388,800
1984-03-21$0.38$0.389,600
1984-03-20$0.38$0.38283,200
1984-03-19$0.38$0.38168,000
1984-03-16$0.38$0.38768,000
1984-03-15$0.38$0.38585,600
1984-03-14$0.38$0.38115,200
1984-03-13$0.38$0.381,252,800
1984-03-12$0.38$0.38134,400
1984-03-09$0.38$0.38172,800
1984-03-08$0.39$0.39230,400
1984-03-07$0.40$0.40201,600
1984-03-06$0.39$0.39624,000
1984-03-05$0.40$0.4019,200
1984-03-02$0.41$0.4138,400
1984-03-01$0.41$0.4157,600
1984-02-29$0.41$0.4128,800
1984-02-28$0.41$0.41340,800
1984-02-27$0.41$0.41556,800
1984-02-24$0.40$0.402,097,600
1984-02-23$0.40$0.40633,600
1984-02-22$0.41$0.41225,600
1984-02-21$0.41$0.41744,000
1984-02-17$0.42$0.42398,400
1984-02-16$0.41$0.41120,000
1984-02-15$0.42$0.4257,600
1984-02-14$0.41$0.41158,400
1984-02-13$0.41$0.41254,400
1984-02-10$0.42$0.42456,000
1984-02-09$0.42$0.42398,400
1984-02-08$0.41$0.41580,800
1984-02-07$0.40$0.403,326,400
1984-02-06$0.39$0.39590,400
1984-02-03$0.42$0.422,361,600
1984-02-02$0.44$0.44297,600
1984-02-01$0.45$0.45676,800
1984-01-31$0.46$0.46364,800
1984-01-30$0.46$0.46187,200
1984-01-27$0.47$0.47201,600
1984-01-26$0.49$0.492,198,400
1984-01-25$0.50$0.502,697,600
1984-01-24$0.50$0.50187,200
1984-01-23$0.52$0.52187,200
1984-01-20$0.53$0.53201,600
1984-01-19$0.53$0.5381,600
1984-01-18$0.53$0.53345,600
1984-01-17$0.54$0.54422,400
1984-01-16$0.54$0.54148,800
1984-01-13$0.55$0.55427,200
1984-01-12$0.55$0.55624,000
1984-01-11$0.55$0.55244,800
1984-01-10$0.56$0.561,507,200
1984-01-09$0.55$0.55360,000
1984-01-06$0.55$0.55163,200
1984-01-05$0.54$0.54134,400
1984-01-04$0.54$0.541,214,400
1984-01-03$0.54$0.54201,600