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Institutional Holdings of GREAT PLAINS ENERGY, INC. (GXP) on 3/31/2010

1. Company Information

Company/StockGREAT PLAINS ENERGY, INC. (stock symbol: GXP)
Funds Ownership191 out of total 2687 funds (7%) own this stock
Funds own total 83,590,896 shares, 61.77% of all outstanding shares
Funds SOLD -2,296,911 shares (-2.67%) in the quarter ended on 3/31/2010

2. Top 20 Funds Held GXP in this Quarter (By Shares) Add to Yahoo Finance Message Board

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)BANK OF NEW YORK MELLON CORP8,450,040Added 6.76%0.08%6.24%
2.)PUTNAM INVESTMENT MANAGEMENT LLC6,234,380Cut -11.60%0.33%4.61%
3.)VANGUARD GROUP INC5,876,158Added 3.61%0.02%4.34%
4.)HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC4,727,405Added 8.59%0.60%3.49%
5.)GAMCO INVESTORS INC ET AL4,166,256Cut -7.52%0.34%3.08%
6.)ING INVESTMENT MANAGEMENT CO3,475,417Added 12.59%0.29%2.57%
7.)BLACKROCK INSTITUTIONAL TRUST COMPANY NA3,386,029Cut -0.73%0.02%2.50%
8.)ANCHOR CAPITAL ADVISORS INC2,801,809Cut -0.87%1.09%2.07%
9.)STATE STREET CORP2,579,676Cut -3.55%0.01%1.91%
10.)LEE MUNDER CAPITAL GROUP LLC2,520,997Cut -1.72%1.24%1.86%
11.)BLACKROCK FUND ADVISORS2,516,181Cut -1.24%0.03%1.86%
12.)JENNISON ASSOCIATES LLC2,462,095Cut -5.22%0.07%1.82%
13.)FIR TREE INC2,152,000Unchanged1.33%1.59%
14.)INVESCO LTD2,022,492Added 12,328.51%0.02%1.49%
15.)GOLDMAN SACHS GROUP INC1,750,855Added 13.92%0.02%1.29%
16.)FRANKLIN RESOURCES INC1,550,968Cut -18.68%0.02%1.15%
17.)DEPRINCE RACE & ZOLLO INC1,510,000Cut -0.06%0.74%1.12%
18.)WELLS FARGO & CO MN1,444,801Cut -5.37%0.02%1.07%
19.)AMERICAN CENTURY COMPANIES INC1,373,983Added 18.41%0.05%1.02%
20.)FMR LLC1,199,229Added 17.83%0.01%0.89%



3. Top 20 Funds Held GXP in this Quarter (By % of Portfolio) Add to Yahoo Finance Message Board

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)MARINER VALUE STRATEGIES LLC562,800New6.66%0.42%
2.)TYNDALL CAPITAL PARTNERS L P1,150,000Cut -19.87%4.65%0.85%
3.)WEALTHTRUST AXIOM LLC146,478Cut -1.25%1.97%0.11%
4.)AKJ ASSET MANAGEMENT LLC79,029Added 1.41%1.34%0.06%
5.)CROW POINT PARTNERS LLC526,000Cut -21.85%1.34%0.39%
6.)FIR TREE INC2,152,000Unchanged1.33%1.59%
7.)LEE MUNDER CAPITAL GROUP LLC2,520,997Cut -1.72%1.24%1.86%
8.)MARSHWINDS ADVISORY CO63,629Cut -0.95%1.10%0.05%
9.)ANCHOR CAPITAL ADVISORS INC2,801,809Cut -0.87%1.09%2.07%
10.)FIDUCIARY MANAGEMENT ASSOCIATES LLC644,100New0.88%0.48%
11.)DEPRINCE RACE & ZOLLO INC1,510,000Cut -0.06%0.74%1.12%
12.)HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC4,727,405Added 8.59%0.60%3.49%
13.)CHUBB CORP407,100Unchanged0.56%0.30%
14.)CATAPULT CAPITAL MANAGEMENT LLC231,258New0.55%0.17%
15.)OTTER CREEK MANAGEMENT INC50,000Unchanged0.51%0.04%
16.)MAPLE SECURITIES USA INC50,991Added 296.32%0.42%0.04%
17.)FOUNDERS BANK & TRUST27,879Cut -8.91%0.37%0.02%
18.)DECADE CAPITAL MANAGEMENT LLC154,734New0.36%0.11%
19.)PHOCAS FINANCIAL CORP77,778New0.36%0.06%
20.)GAMCO INVESTORS INC ET AL4,166,256Cut -7.52%0.34%3.08%

4. Top 20 Funds BOUGHT NEW GXP in this Quarter (By Shares) Add to Yahoo Finance Message Board

No.FundSharesPut/Call% Port.% Out. Shrs
1.)FIDUCIARY MANAGEMENT ASSOCIATES LLC644,1000.88%0.48%
2.)MARINER VALUE STRATEGIES LLC562,8006.66%0.42%
3.)ARONSON & JOHNSON & ORTIZ LP507,1000.05%0.37%
4.)D E SHAW & CO INC281,2310.01%0.21%
5.)PGGM INVESTMENTS251,8190.04%0.19%
6.)CATAPULT CAPITAL MANAGEMENT LLC231,2580.55%0.17%
7.)DECADE CAPITAL MANAGEMENT LLC154,7340.36%0.11%
8.)BRYN MAWR CAPITAL MANAGEMENT INC133,3910.21%0.10%
9.)GOFEN & GLOSSBERG LLC IL 128,7020.19%0.10%
10.)PHOCAS FINANCIAL CORP77,7780.36%0.06%
11.)BLACKTHORN INVESTMENT GROUP LLC50,0000.31%0.04%
12.)CAXTON ASSOCIATES LLC46,7380.03%0.03%
13.)SAC CAPITAL ADVISORS LP38,9110.01%0.03%
14.)MAGNETAR FINANCIAL LLC32,6570.04%0.02%
15.)MADISON SQUARE INVESTORS LLC27,2950.01%0.02%
16.)UBS OCONNOR LLC19,0000.01%0.01%
17.)SUSQUEHANNA INTERNATIONAL GROUP LLP17,400PUT0.00%0.01%
18.)ALLSTATE INSURANCE CO15,4200.01%0.01%
19.)HBK INVESTMENTS L P14,9000.01%0.01%
20.)DEAN C H & ASSOCIATES INC14,5000.15%0.01%

5. Top 20 Funds SOLD OUT GXP in this Quarter (By Shares) Add to Yahoo Finance Message Board

No.FundSharesPut/Call% Port.% Out. Shrs
1.)HALIS JEFFREY S1,435,0845.66%1.06%
2.)FIL LTD837,4200.05%0.62%
3.)RENAISSANCE TECHNOLOGIES LLC299,9150.02%0.22%
4.)ROBECO INVESTMENT MANAGEMENT INC188,9600.02%0.14%
5.)BOULDER INVESTMENT ADVISERS LLC150,0000.61%0.11%
6.)BLACKROCK ADVISORS LLC127,4000.00%0.09%
7.)HSBC HOLDINGS PLC87,6120.01%0.06%
8.)MASSACHUSETTS FINANCIAL SERVICES CO MA 85,7900.00%0.06%
9.)JANNEY MONTGOMERY SCOTT LLC49,1240.06%0.04%
10.)RAMSEY ASSET MANAGEMENT48,1601.24%0.04%
11.)OPPENHEIMER & CO INC34,9000.06%0.03%
12.)SOROS FUND MANAGEMENT LLC13,0000.00%0.01%
13.)MONROE BANK & TRUST MI10,6510.14%0.01%
14.)LOEB PARTNERS CORP10,2840.07%0.01%
15.)RAFFERTY ASSET MANAGEMENT LLC9,0650.01%0.01%
16.)OMERS ADMINISTRATION CORP3,6000.00%0.00%
17.)GLENMEDE TRUST CO NA3,1000.00%0.00%
18.)ADVISOR PARTNERS LLC9200.01%0.00%
19.)TOMPKINS FINANCIAL CORP5000.00%0.00%
20.)PEAPACK GLADSTONE FINANCIAL CORP1500.00%0.00%