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Institutional Holdings of RIVERBED TECHNOLOGY, INC. (RVBD) on 3/31/2010

1. Company Information

Company/StockRIVERBED TECHNOLOGY, INC. (stock symbol: RVBD)
Funds Ownership195 out of total 2687 funds (7%) own this stock
Funds own total 63,213,298 shares, 91.35% of all outstanding shares
Funds BOUGHT 6,661,365 more shares (+11.78%) in the quarter ended on 3/31/2010

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

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)FMR LLC10,663,939Added 1.56%0.07%15.41%
2.)WELLINGTON MANAGEMENT CO LLP6,122,655New0.08%8.85%
3.)VANGUARD GROUP INC2,543,644Added 8.40%0.02%3.68%
4.)BLACKROCK INSTITUTIONAL TRUST COMPANY NA1,744,308Added 3.76%0.02%2.52%
5.)CALAMOS ADVISORS LLC1,676,090Added 12.00%0.23%2.42%
6.)AXA1,602,207Cut -5.98%0.03%2.32%
7.)BLACKROCK FUND ADVISORS1,420,996Added 1.80%0.03%2.05%
8.)NEXT CENTURY GROWTH INVESTORS LLC1,389,126Added 3.25%1.74%2.01%
9.)STATE STREET CORP1,241,807Added 4.82%0.01%1.79%
10.)WADDELL & REED FINANCIAL INC1,234,316Cut -29.20%0.12%1.78%
11.)RAINIER INVESTMENT MANAGEMENT INC 1,226,080Added 9.71%0.23%1.77%
12.)RCM CAPITAL MANAGEMENT LLC1,137,817Cut -49.43%0.20%1.64%
13.)WASATCH ADVISORS INC1,092,179Added 19.87%0.57%1.58%
14.)PRICE T ROWE ASSOCIATES INC MD 1,060,020Cut -3.46%0.01%1.53%
15.)LORD ABBETT & CO LLC1,039,939Cut -27.37%0.07%1.50%
16.)J P MORGAN CHASE & CO997,303Added 125.30%0.02%1.44%
17.)EAGLE ASSET MANAGEMENT INC862,967Added 5.00%0.27%1.25%
18.)TURNER INVESTMENT PARTNERS INC854,218Added 12.56%0.16%1.23%
19.)NORTHERN TRUST CORP830,929Added 13.44%0.01%1.20%
20.)BANK OF NEW YORK MELLON CORP824,722Added 68.79%0.01%1.19%



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

No.FundSharesPut/CallActivity(Shr)% Port.% Out. Shrs
1.)7X7 ASSET MANAGEMENT LLC450,000New3.71%0.65%
2.)CONTRAVISORY RESEARCH & MANAGEMENT CORP307,893Cut -6.68%3.21%0.44%
3.)NORRIS PERNE & FRENCH LLP MI231,680Added 4.30%2.51%0.33%
4.)ARBOR CAPITAL MANAGEMENT LLC774,800Added 38.21%2.32%1.12%
5.)CAPITAL MANAGEMENT ASSOCIATES INC88,285New2.32%0.13%
6.)AH LISANTI CAPITAL GROWTH LLC114,714Added 8.77%1.90%0.17%
7.)CADIAN CAPITAL MANAGEMENT LLC798,200Cut -6.64%1.76%1.15%
8.)NEXT CENTURY GROWTH INVESTORS LLC1,389,126Added 3.25%1.74%2.01%
9.)STERLING JOHNSTON CAPITAL MANAGEMENT LP175,400Cut -19.52%1.66%0.25%
10.)SUMMIT CREEK ADVISORS LLC12,310New1.56%0.02%
11.)BEEKMAN CAPITAL MANAGEMENT LTD575Cut -99.78%1.40%0.00%
12.)GANNETT WELSH & KOTLER453,216Added 5.18%1.24%0.65%
13.)CAMELOT MANAGEMENT CORP10,000New1.09%0.01%
14.)STEPHENS INVESTMENT MANAGEMENT GROUP LLC274,471Added 44.63%1.00%0.40%
15.)PROVIDENT INVESTMENT COUNSEL174,983Unchanged0.97%0.25%
16.)EMERALD MUTUAL FUND ADVISERS TRUST103,093Added 5.66%0.89%0.15%
17.)CROSSLINK CAPITAL INC173,742Cut -66.88%0.89%0.25%
18.)COLUMBIA PARTNERS L L C INVESTMENT MANAGEMENT439,143Added 455.43%0.84%0.63%
19.)APEX CAPITAL MANAGEMENT180,796Added 60.75%0.81%0.26%
20.)CALAMOS WEALTH MANAGEMENT LLC44,200Added 93.18%0.79%0.06%

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

No.FundSharesPut/Call% Port.% Out. Shrs
1.)WELLINGTON MANAGEMENT CO LLP6,122,6550.08%8.85%
2.)ALGER FRED MANAGEMENT INC614,0510.16%0.89%
3.)JENNISON ASSOCIATES LLC505,7610.02%0.73%
4.)CADENCE CAPITAL MANAGEMENT LLC453,8500.30%0.66%
5.)7X7 ASSET MANAGEMENT LLC450,0003.71%0.65%
6.)JACOBS LEVY EQUITY MANAGEMENT INC442,4000.17%0.64%
7.)CENTURY CAPITAL MANAGEMENT LLC240,8840.42%0.35%
8.)UBS GLOBAL ASSET MANAGEMENT AMERICAS INC208,9000.01%0.30%
9.)CAPITAL FUND MANAGEMENT SA144,600PUT0.07%0.21%
10.)STIFEL NICOLAUS & CO INC MO 133,8830.19%0.19%
11.)SIGMA CAPITAL MANAGEMENT LLC130,0000.24%0.19%
12.)BALYASNY ASSET MANAGEMENT LLC100,0000.19%0.14%
13.)DNB NOR ASSET MANAGEMENT AS98,8910.08%0.14%
14.)LOOMIS SAYLES & CO L P97,7620.02%0.14%
15.)PEAK6 INVESTMENTS LP88,3750.02%0.13%
16.)CAPITAL MANAGEMENT ASSOCIATES INC88,2852.32%0.13%
17.)BAMCO INC NY 87,5000.02%0.13%
18.)DSM CAPITAL PARTNERS LLC68,9350.08%0.10%
19.)CATAPULT CAPITAL MANAGEMENT LLC51,0000.20%0.07%
20.)CAPITAL FUND MANAGEMENT SA38,800CALL0.02%0.06%

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

No.FundSharesPut/Call% Port.% Out. Shrs
1.)CORTINA ASSET MANAGEMENT LLC729,4181.42%1.05%
2.)GOODMAN & COMPANY INVESTMENT COUNSEL LTD562,4000.14%0.81%
3.)AVESTA CAPITAL ADVISORS LLC335,0000.50%0.48%
4.)ELLIOTT MANAGEMENT CORP290,0000.63%0.42%
5.)MAZAMA CAPITAL MANAGEMENT INC216,3950.57%0.31%
6.)SUNTRUST BANKS INC160,9900.02%0.23%
7.)SUSQUEHANNA INTERNATIONAL GROUP LLP150,900CALL0.01%0.22%
8.)SYMMETRY PEAK MANAGEMENT LLC141,6001.04%0.20%
9.)MILLENNIUM MANAGEMENT LLC100,000CALL0.03%0.14%
10.)WEISS MULTI STRATEGY ADVISERS LLC98,6490.11%0.14%
11.)DIAMONDBACK CAPITAL MANAGEMENT LLC89,9790.05%0.13%
12.)EMPLOYEES RETIREMENT SYSTEM OF TEXAS77,4300.03%0.11%
13.)PARTNER FUND MANAGEMENT LP57,8890.08%0.08%
14.)GRUBER & MCBAINE CAPITAL MANAGEMENT LLC52,4000.23%0.08%
15.)STATE TREASURER STATE OF MICHIGAN50,0000.05%0.07%
16.)RS INVESTMENT MANAGEMENT CO LLC42,3000.01%0.06%
17.)SCHWAB CHARLES INVESTMENT MANAGEMENT INC39,2320.00%0.06%
18.)MOODY LYNN & CO 38,4550.18%0.06%
19.)TECHNICAL FINANCIAL SERVICES LLC38,0000.10%0.05%
20.)GW CAPITAL MANAGEMENT LLC32,6000.03%0.05%