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General | Insiders | Insider Transactions | Monthly Overview | Weekly Overview

Overview of all insider trading transactions in SEI INVESTMENTS CO. Get notifications about new insider transactions in SEI INVESTMENTS CO for free.

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Date	Ticker	Company	Owner	Relationship	Transaction	Code	Cost ($)	Shares	Transaction Value ($)	Total Shares	% Holdings
Jul 27 2006	SEIC	SEI INVESTMENTS CO	Ujobai Joseph P	Executive Vice Pres ...	Sell	S	46.82	7,500	351,150	569	8.1 K to 569 (-92.95 %)
Jul 18 2006	SEIC	SEI INVESTMENTS CO	LIEB RICHARD	Director	Option Exercise	M	14.95	20,000	299,000	484,005
Jun 27 2006	SEIC	SEI INVESTMENTS CO	DORAN WILLIAM	Director	Sell	S	45.12	5,000	225,600	378,694	383.7 K to 378.7 K (-1.30 %)
Jun 26 2006	SEIC	SEI INVESTMENTS CO	Dasher Karl	Executive Vice pres ...	Option Exercise	M	19.75	10,000	197,500	22,632
Jun 26 2006	SEIC	SEI INVESTMENTS CO	Dasher Karl	Executive Vice pres ...	Sell	S	44.50	5,000	222,500	12,632	17.6 K to 12.6 K (-28.36 %)
Jun 26 2006	SEIC	SEI INVESTMENTS CO	Dasher Karl	Executive Vice pres ...	Sell	S	44.45	2,500	111,125	17,632	20.1 K to 17.6 K (-12.42 %)
Jun 26 2006	SEIC	SEI INVESTMENTS CO	Dasher Karl	Executive Vice pres ...	Sell	S	44.40	2,500	111,000	20,132	22.6 K to 20.1 K (-11.05 %)
Jun 08 2006	SEIC	SEI INVESTMENTS CO	LOUGHLIN EDWARD	Executive Vice Pres ...	Sell	S	45.80	10,000	458,000	316,818	326.8 K to 316.8 K (-3.06 %)
Jun 08 2006	SEIC	SEI INVESTMENTS CO	LOUGHLIN EDWARD	Executive Vice Pres ...	Sell	S	45.71	5,000	228,550	326,818	331.8 K to 326.8 K (-1.51 %)
Jun 08 2006	SEIC	SEI INVESTMENTS CO	LOUGHLIN EDWARD	Executive Vice Pres ...	Sell	S	45.70	7,500	342,750	331,818	339.3 K to 331.8 K (-2.21 %)
Jun 08 2006	SEIC	SEI INVESTMENTS CO	LOUGHLIN EDWARD	Executive Vice Pres ...	Sell	S	45.69	2,000	91,380	339,318	341.3 K to 339.3 K (-0.59 %)
Jun 08 2006	SEIC	SEI INVESTMENTS CO	LOUGHLIN EDWARD	Executive Vice Pres ...	Sell	S	45.67	6,000	274,020	341,318	347.3 K to 341.3 K (-1.73 %)
Jun 08 2006	SEIC	SEI INVESTMENTS CO	LOUGHLIN EDWARD	Executive Vice Pres ...	Sell	S	45.66	28,500	1,301,310	347,318	375.8 K to 347.3 K (-7.58 %)
Jun 08 2006	SEIC	SEI INVESTMENTS CO	LOUGHLIN EDWARD	Executive Vice Pres ...	Sell	S	45.65	15,000	684,750	375,818	390.8 K to 375.8 K (-3.84 %)
Jun 08 2006	SEIC	SEI INVESTMENTS CO	LOUGHLIN EDWARD	Executive Vice Pres ...	Sell	S	45.64	8,500	387,940	390,818	399.3 K to 390.8 K (-2.13 %)
Jun 08 2006	SEIC	SEI INVESTMENTS CO	LOUGHLIN EDWARD	Executive Vice Pres ...	Sell	S	45.63	10,500	479,115	399,318	409.8 K to 399.3 K (-2.56 %)
Jun 08 2006	SEIC	SEI INVESTMENTS CO	LOUGHLIN EDWARD	Executive Vice Pres ...	Sell	S	42.62	2,000	85,240	409,818	411.8 K to 409.8 K (-0.49 %)
Jun 08 2006	SEIC	SEI INVESTMENTS CO	LOUGHLIN EDWARD	Executive Vice Pres ...	Sell	S	45.60	12,000	547,200	411,818	423.8 K to 411.8 K (-2.83 %)
Jun 08 2006	SEIC	SEI INVESTMENTS CO	LOUGHLIN EDWARD	Executive Vice Pres ...	Sell	S	45.45	2,000	90,900	423,818	425.8 K to 423.8 K (-0.47 %)
Jun 08 2006	SEIC	SEI INVESTMENTS CO	LOUGHLIN EDWARD	Executive Vice Pres ...	Sell	S	45.41	1,000	45,410	425,818	426.8 K to 425.8 K (-0.23 %)
Jun 02 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	45.73	4,440	203,041	236,758	241.2 K to 236.8 K (-1.84 %)
Jun 02 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	45.75	11,000	503,250	10,124,066	10.1 M to 10.1 M (-0.11 %)
Jun 02 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	45.55	5,000	227,750	10,135,066	10.1 M to 10.1 M (-0.05 %)
Jun 02 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	45.53	20,000	910,600	10,140,066	10.2 M to 10.1 M (-0.20 %)
Jun 02 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	45.52	5,000	227,600	10,160,066	10.2 M to 10.2 M (-0.05 %)
Jun 02 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	45.50	20,000	910,000	10,165,066	10.2 M to 10.2 M (-0.20 %)
Jun 02 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	45.46	25,000	1,136,500	10,185,066	10.2 M to 10.2 M (-0.24 %)
Jun 02 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	45.30	25,000	1,132,500	10,210,066	10.2 M to 10.2 M (-0.24 %)
May 12 2006	SEIC	SEI INVESTMENTS CO	LIEB RICHARD	Director	Gift	G	0.00	5,000	0	464,005	469 K to 464 K (-1.07 %)
May 12 2006	SEIC	SEI INVESTMENTS CO	LIEB RICHARD	Director	Sell	S	45.86	900	41,274	469,005	469.9 K to 469 K (-0.19 %)
May 12 2006	SEIC	SEI INVESTMENTS CO	LIEB RICHARD	Director	Sell	S	45.85	900	41,265	469,905	470.8 K to 469.9 K (-0.19 %)
May 12 2006	SEIC	SEI INVESTMENTS CO	LIEB RICHARD	Director	Sell	S	45.84	100	4,584	470,805	470.9 K to 470.8 K (-0.02 %)
May 12 2006	SEIC	SEI INVESTMENTS CO	LIEB RICHARD	Director	Sell	S	45.83	100	4,583	470,905	471 K to 470.9 K (-0.02 %)
May 12 2006	SEIC	SEI INVESTMENTS CO	LIEB RICHARD	Director	Sell	S	45.75	2,600	118,950	471,005	473.6 K to 471 K (-0.55 %)
May 12 2006	SEIC	SEI INVESTMENTS CO	LIEB RICHARD	Director	Sell	S	45.74	293	13,402	473,605	473.9 K to 473.6 K (-0.06 %)
May 12 2006	SEIC	SEI INVESTMENTS CO	LIEB RICHARD	Director	Sell	S	45.63	107	4,882	473,898	474 K to 473.9 K (-0.02 %)
May 18 2006	SEIC	SEI INVESTMENTS CO	MCGONIGLE DENNIS	Executive Vice Pres ...	Option Exercise	M	7.00	90,000	630,000	475,250
May 18 2006	SEIC	SEI INVESTMENTS CO	MCGONIGLE DENNIS	Executive Vice Pres ...	Option Exercise	M	3.60	90,000	324,000	385,250
May 18 2006	SEIC	SEI INVESTMENTS CO	MCGONIGLE DENNIS	Executive Vice Pres ...	Sell	S	44.88	5,000	224,400	435,250	440.3 K to 435.3 K (-1.14 %)
May 18 2006	SEIC	SEI INVESTMENTS CO	MCGONIGLE DENNIS	Executive Vice Pres ...	Sell	S	44.81	2,500	112,025	440,250	442.8 K to 440.3 K (-0.56 %)
May 18 2006	SEIC	SEI INVESTMENTS CO	MCGONIGLE DENNIS	Executive Vice Pres ...	Sell	S	44.77	15,000	671,550	442,750	457.8 K to 442.8 K (-3.28 %)
May 18 2006	SEIC	SEI INVESTMENTS CO	MCGONIGLE DENNIS	Executive Vice Pres ...	Sell	S	44.75	17,500	783,125	457,750	475.3 K to 457.8 K (-3.68 %)
May 05 2006	SEIC	SEI INVESTMENTS CO	GUARINO CARL	Executive Vice Pres ...	Sell	S	44.11	11,133	491,077	162,830	174 K to 162.8 K (-6.40 %)
May 05 2006	SEIC	SEI INVESTMENTS CO	GUARINO CARL	Executive Vice Pres ...	Sell	S	44.11	5,867	258,793	44,461	50.3 K to 44.5 K (-11.66 %)
May 05 2006	SEIC	SEI INVESTMENTS CO	GUARINO CARL	Executive Vice Pres ...	Sell	S	44.00	90,000	3,960,000	218,938	308.9 K to 218.9 K (-29.13 %)
Apr 27 2006	SEIC	SEI INVESTMENTS CO	GUARINO CARL	Executive Vice Pres ...	Option Exercise	M	7.00	90,000	630,000	0
Apr 27 2006	SEIC	SEI INVESTMENTS CO	GUARINO CARL	Executive Vice Pres ...	Buy	M	7.00	90,000	630,000	308,938	218.9 K to 308.9 K (+41.11 %)
Apr 27 2006	SEIC	SEI INVESTMENTS CO	GUARINO CARL	Executive Vice Pres ...	Gift	G	0.00	20,000	0	218,938	238.9 K to 218.9 K (-8.37 %)
Apr 24 2006	SEIC	SEI INVESTMENTS CO	WITHROW WAYNE	Executive Vice Pre ...	Option Exercise	M	7.00	22,000	154,000	98,000
Apr 24 2006	SEIC	SEI INVESTMENTS CO	WITHROW WAYNE	Executive Vice Pre ...	Option Exercise	M	3.60	18,000	64,800	0
Apr 24 2006	SEIC	SEI INVESTMENTS CO	WITHROW WAYNE	Executive Vice Pre ...	Buy	M	7.00	22,000	154,000	40,803	18.8 K to 40.8 K (+117.00 %)
Apr 24 2006	SEIC	SEI INVESTMENTS CO	WITHROW WAYNE	Executive Vice Pre ...	Buy	M	3.60	18,000	64,800	18,803	803 to 18.8 K (+2,241.59 %)
Mar 23 2006	SEIC	SEI INVESTMENTS CO	LIEB RICHARD	Director	Sell	S	40.35	10,000	403,500	474,005	484 K to 474 K (-2.07 %)
Mar 23 2006	SEIC	SEI INVESTMENTS CO	LIEB RICHARD	Director	Gift	G	0.00	1,000	0	484,005	485 K to 484 K (-0.21 %)
Mar 13 2006	SEIC	SEI INVESTMENTS CO	DORAN WILLIAM	Director	Sell	S	40.25	5,000	201,250	383,694	388.7 K to 383.7 K (-1.29 %)
Mar 03 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	42.25	11,900	502,775	10,235,066	10.2 M to 10.2 M (-0.12 %)
Mar 03 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	42.26	6,100	257,786	10,246,966	10.3 M to 10.2 M (-0.06 %)
Mar 03 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	42.25	23,304	984,594	10,253,066	10.3 M to 10.3 M (-0.23 %)
Mar 01 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	42.25	1,696	71,656	10,276,370	10.3 M to 10.3 M (-0.02 %)
Feb 28 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	42.35	125,675	5,322,336	10,278,066	10.4 M to 10.3 M (-1.21 %)
Feb 28 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	42.24	22,825	964,128	10,403,741	10.4 M to 10.4 M (-0.22 %)
Feb 22 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	42.37	11,800	499,966	10,426,566	10.4 M to 10.4 M (-0.11 %)
Feb 22 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	12,117	0	10,438,366	10.5 M to 10.4 M (-0.12 %)
Feb 22 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	24,234	0	10,450,483	10.5 M to 10.5 M (-0.23 %)
Feb 22 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	606	0	10,474,717	10.5 M to 10.5 M (-0.01 %)
Feb 22 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	2,424	0	10,475,323	10.5 M to 10.5 M (-0.02 %)
Feb 22 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	36,351	0	10,477,747	10.5 M to 10.5 M (-0.35 %)
Feb 22 2006	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	606	0	10,514,098	10.5 M to 10.5 M (-0.01 %)
Feb 10 2006	SEIC	SEI INVESTMENTS CO	SMITH THOMAS W	Director	Sell	S	41.80	11,000	459,800	287,664	298.7 K to 287.7 K (-3.68 %)
Feb 10 2006	SEIC	SEI INVESTMENTS CO	SMITH THOMAS W	Director	Sell	S	42.21	10,000	422,100	55,000	65 K to 55 K (-15.38 %)
Feb 06 2006	SEIC	SEI INVESTMENTS CO	GUARINO CARL	Executive Vice Pres ...	Option Exercise	M	3.60	90,000	324,000	328,936
Feb 06 2006	SEIC	SEI INVESTMENTS CO	GUARINO CARL	Executive Vice Pres ...	Sell	S	41.19	10,000	411,900	238,936	248.9 K to 238.9 K (-4.02 %)
Feb 06 2006	SEIC	SEI INVESTMENTS CO	GUARINO CARL	Executive Vice Pres ...	Sell	S	41.11	10,000	411,100	248,936	258.9 K to 248.9 K (-3.86 %)
Feb 06 2006	SEIC	SEI INVESTMENTS CO	GUARINO CARL	Executive Vice Pres ...	Sell	S	41.12	5,000	205,600	258,936	263.9 K to 258.9 K (-1.89 %)
Feb 06 2006	SEIC	SEI INVESTMENTS CO	GUARINO CARL	Executive Vice Pres ...	Sell	S	41.05	30,000	1,231,500	263,936	293.9 K to 263.9 K (-10.21 %)
Feb 06 2006	SEIC	SEI INVESTMENTS CO	GUARINO CARL	Executive Vice Pres ...	Sell	S	41.02	15,000	615,300	293,936	308.9 K to 293.9 K (-4.86 %)
Feb 06 2006	SEIC	SEI INVESTMENTS CO	GUARINO CARL	Executive Vice Pres ...	Sell	S	41.15	2,500	102,875	308,936	311.4 K to 308.9 K (-0.80 %)
Feb 06 2006	SEIC	SEI INVESTMENTS CO	GUARINO CARL	Executive Vice Pres ...	Sell	S	41.17	17,500	720,475	311,436	328.9 K to 311.4 K (-5.32 %)
Feb 06 2006	SEIC	SEI INVESTMENTS CO	GUARINO CARL	Executive Vice Pres ...	Buy	M	3.60	90,000	324,000	328,936	238.9 K to 328.9 K (+37.67 %)
Jan 03 2006	SEIC	SEI INVESTMENTS CO	PORTER HENRY	Director	Gift	G	0.00	1,000	0	302,625	303.6 K to 302.6 K (-0.33 %)
Jan 03 2006	SEIC	SEI INVESTMENTS CO	WITHROW WAYNE	Executive Vice Pre ...	Gift	G	0.00	56	0	719	775 to 719 (-7.23 %)
Jan 03 2006	SEIC	SEI INVESTMENTS CO	DORAN WILLIAM	Director	Sell	S	37.77	400	15,108	11,500	11.9 K to 11.5 K (-3.36 %)
Jan 03 2006	SEIC	SEI INVESTMENTS CO	DORAN WILLIAM	Director	Gift	G	0.00	400	0	11,900	12.3 K to 11.9 K (-3.25 %)
Jan 03 2006	SEIC	SEI INVESTMENTS CO	DORAN WILLIAM	Director	Gift	G	0.00	3,000	0	308,884	311.9 K to 308.9 K (-0.96 %)
Jan 03 2006	SEIC	SEI INVESTMENTS CO	DORAN WILLIAM	Director	Gift	G	0.00	6,000	0	311,884	317.9 K to 311.9 K (-1.89 %)
Dec 16 2005	SEIC	SEI INVESTMENTS CO	SMITH THOMAS W	Director	Option Exercise	A	38.54	4,000	154,160	4,000
Dec 16 2005	SEIC	SEI INVESTMENTS CO	SMITH THOMAS W	Director	Sell	S	38.60	35,000	1,351,000	199,100	234.1 K to 199.1 K (-14.95 %)
Dec 16 2005	SEIC	SEI INVESTMENTS CO	VASSALLUZZO SCOTT J	10% Owner	Sell	S	38.60	35,000	1,351,000	199,100	234.1 K to 199.1 K (-14.95 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	MCGONIGLE DENNIS	Executive Vice Pres ...	Option Exercise	A	38.54	15,000	578,100	15,000
Dec 15 2005	SEIC	SEI INVESTMENTS CO	CRUDUP ROBERT	Executive Vice Pres ...	Option Exercise	A	38.54	15,000	578,100	15,000
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WITHROW WAYNE	Executive Vice Pre ...	Option Exercise	A	38.54	25,000	963,500	25,000
Dec 15 2005	SEIC	SEI INVESTMENTS CO	Klauder N Jeffrey	General Counsel / E ...	Option Exercise	A	38.54	25,000	963,500	25,000
Dec 15 2005	SEIC	SEI INVESTMENTS CO	Ujobai Joseph P	Executive Vice Pres ...	Option Exercise	A	38.54	25,000	963,500	25,000
Dec 15 2005	SEIC	SEI INVESTMENTS CO	LOUGHLIN EDWARD	Executive Vice Pres ...	Option Exercise	A	38.54	15,000	578,100	15,000
Dec 15 2005	SEIC	SEI INVESTMENTS CO	HEILIG KATHY	Controller/Senior V ...	Option Exercise	A	38.54	15,000	578,100	15,000
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	242	0	10,517,050	10.5 M to 10.5 M (0.00 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	36,259	0	10,517,292	10.6 M to 10.5 M (-0.34 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	303	0	10,553,551	10.6 M to 10.6 M (0.00 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	3,626	0	10,553,854	10.6 M to 10.6 M (-0.03 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	1,209	0	10,557,480	10.6 M to 10.6 M (-0.01 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	605	0	10,558,689	10.6 M to 10.6 M (-0.01 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	121	0	10,559,294	10.6 M to 10.6 M (0.00 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	49,553	0	10,559,415	10.6 M to 10.6 M (-0.47 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	121	0	10,514,704	10.5 M to 10.5 M (0.00 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	121	0	10,514,825	10.5 M to 10.5 M (0.00 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	121	0	10,514,946	10.5 M to 10.5 M (0.00 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	121	0	10,515,067	10.5 M to 10.5 M (0.00 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	121	0	10,515,188	10.5 M to 10.5 M (0.00 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	121	0	10,515,309	10.5 M to 10.5 M (0.00 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	121	0	10,515,430	10.5 M to 10.5 M (0.00 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	242	0	10,515,551	10.5 M to 10.5 M (0.00 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	242	0	10,515,793	10.5 M to 10.5 M (0.00 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	121	0	10,516,035	10.5 M to 10.5 M (0.00 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	121	0	10,516,156	10.5 M to 10.5 M (0.00 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	531	0	10,516,277	10.5 M to 10.5 M (-0.01 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	121	0	10,516,808	10.5 M to 10.5 M (0.00 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Gift	G	0.00	121	0	10,516,929	10.5 M to 10.5 M (0.00 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	ROMEO CARMEN	Executive Vice Pres ...	Option Exercise	A	38.54	4,000	154,160	4,000
Dec 15 2005	SEIC	SEI INVESTMENTS CO	LIEB RICHARD	Director	Gift	G	0.00	3,000	0	485,005	488 K to 485 K (-0.61 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	LIEB RICHARD	Director	Option Exercise	A	38.54	4,000	154,160	4,000
Dec 15 2005	SEIC	SEI INVESTMENTS CO	PORTER HENRY	Director	Option Exercise	A	38.54	4,000	154,160	4,000
Dec 15 2005	SEIC	SEI INVESTMENTS CO	MCCARTHY KATHRYN	Director	Option Exercise	A	38.54	4,000	154,160	4,000
Dec 15 2005	SEIC	SEI INVESTMENTS CO	BLUMENSTEIN SARAH	Director	Option Exercise	A	38.54	4,000	154,160	4,000
Dec 15 2005	SEIC	SEI INVESTMENTS CO	Ross Howard D	Director	Option Exercise	A	38.54	4,000	154,160	4,000
Dec 15 2005	SEIC	SEI INVESTMENTS CO	DORAN WILLIAM	Director	Option Exercise	A	38.54	4,000	154,160	4,000
Dec 15 2005	SEIC	SEI INVESTMENTS CO	HEILIG KATHY	Controller/Senior V ...	Option Exercise	M	7.00	12,000	84,000	0
Dec 15 2005	SEIC	SEI INVESTMENTS CO	HEILIG KATHY	Controller/Senior V ...	Sell	S	38.50	12,000	462,000	1,891	13.9 K to 1.9 K (-86.39 %)
Dec 15 2005	SEIC	SEI INVESTMENTS CO	HEILIG KATHY	Controller/Senior V ...	Buy	M	7.00	12,000	84,000	13,891	1.9 K to 13.9 K (+634.58 %)
Nov 29 2005	SEIC	SEI INVESTMENTS CO	ROMEO CARMEN	Executive Vice Pres ...	Gift	G	0.00	3,000	0	1,755,180	1.8 M to 1.8 M (-0.17 %)
Nov 14 2005	SEIC	SEI INVESTMENTS CO	WITHROW WAYNE	Executive Vice Pre ...	Sell	S	39.80	10,000	398,000	775	10.8 K to 775 (-92.81 %)
Nov 07 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	39.39	5,100	200,889	241,198	246.3 K to 241.2 K (-2.07 %)
Oct 31 2005	SEIC	SEI INVESTMENTS CO	ROMEO CARMEN	Executive Vice Pres ...	Option Exercise	M	14.96	9,196	137,572	0
Oct 31 2005	SEIC	SEI INVESTMENTS CO	ROMEO CARMEN	Executive Vice Pres ...	Sell	S	37.79	2,570	97,120	1,758,180	1.8 M to 1.8 M (-0.15 %)
Oct 31 2005	SEIC	SEI INVESTMENTS CO	ROMEO CARMEN	Executive Vice Pres ...	Sell	S	37.76	100	3,776	1,760,750	1.8 M to 1.8 M (-0.01 %)
Oct 31 2005	SEIC	SEI INVESTMENTS CO	ROMEO CARMEN	Executive Vice Pres ...	Sell	S	37.75	6,526	246,357	1,760,850	1.8 M to 1.8 M (-0.37 %)
Oct 31 2005	SEIC	SEI INVESTMENTS CO	ROMEO CARMEN	Executive Vice Pres ...	Buy	M	14.96	9,196	137,572	1,767,376	1.8 M to 1.8 M (+0.52 %)
Oct 27 2005	SEIC	SEI INVESTMENTS CO	ROMEO CARMEN	Executive Vice Pres ...	Option Exercise	M	14.96	5,554	83,088	9,196
Oct 27 2005	SEIC	SEI INVESTMENTS CO	ROMEO CARMEN	Executive Vice Pres ...	Option Exercise	M	14.96	30,000	448,800	14,750
Oct 27 2005	SEIC	SEI INVESTMENTS CO	ROMEO CARMEN	Executive Vice Pres ...	Sell	S	38.40	5,554	213,274	1,758,180	1.8 M to 1.8 M (-0.31 %)
Oct 27 2005	SEIC	SEI INVESTMENTS CO	ROMEO CARMEN	Executive Vice Pres ...	Buy	M	14.96	5,554	83,088	1,763,734	1.8 M to 1.8 M (+0.32 %)
Oct 27 2005	SEIC	SEI INVESTMENTS CO	ROMEO CARMEN	Executive Vice Pres ...	Sell	S	38.00	20,000	760,000	1,758,180	1.8 M to 1.8 M (-1.12 %)
Oct 27 2005	SEIC	SEI INVESTMENTS CO	ROMEO CARMEN	Executive Vice Pres ...	Sell	S	38.25	10,000	382,500	1,778,180	1.8 M to 1.8 M (-0.56 %)
Oct 27 2005	SEIC	SEI INVESTMENTS CO	ROMEO CARMEN	Executive Vice Pres ...	Buy	M	14.96	30,000	448,800	1,788,180	1.8 M to 1.8 M (+1.71 %)
Oct 27 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	37.99	5,000	189,950	10,608,968	10.6 M to 10.6 M (-0.05 %)
Oct 27 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	37.98	17,818	676,728	10,613,968	10.6 M to 10.6 M (-0.17 %)
Oct 27 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	37.96	5,000	189,800	10,631,786	10.6 M to 10.6 M (-0.05 %)
Oct 27 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	37.95	7,500	284,625	10,636,786	10.6 M to 10.6 M (-0.07 %)
Oct 27 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	37.92	20,000	758,400	10,644,286	10.7 M to 10.6 M (-0.19 %)
Oct 27 2005	SEIC	SEI INVESTMENTS CO	WEST ALFRED P JR	Chairman and Chief ...	Sell	S	37.90	4,682	177,448	10,664,286	10.7 M to 10.7 M (-0.04 %)
Oct 26 2005	SEIC	SEI INVESTMENTS CO	LIEB RICHARD	Director	Sell	S	38.04	2,500	95,100	488,005	490.5 K to 488 K (-0.51 %)

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