| 27.49 Data as of May 24 |  0.00 / 0.00%Today’s Change | 22.45 Today|||52-Week Range 29.75 | +6.63% Year-to-Date |
| Mutual fund holders | 59.50% |
| Other institutional | 38.34% |
| Individual stakeholders | 21.50% |
| 3/31/2013 | EAGLE ASSET MANAGEMENT, INC. Bought 384.4 Thousand shares of MKS Instruments Inc |
| 3/31/2013 | BLACKROCK FUND ADVISORS Bought 333.5 Thousand shares of MKS Instruments Inc |
| 3/31/2013 | HEARTLAND ADVISORS, INC. Bought 300.0 Thousand shares of MKS Instruments Inc |
| Stockholder | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| Royce & Associates LLC | 12.48% | 6,594,060 | 177,182,392 | -457,119 | -6.48% |
| BlackRock Fund Advisors | 7.81% | 4,125,798 | 110,860,192 | +333,546 | +8.80% |
| The Vanguard Group, Inc. | 5.83% | 3,077,596 | 82,695,005 | -21,995 | -0.71% |
| Dimensional Fund Advisors, Inc. | 5.81% | 3,071,622 | 82,534,483 | +81,635 | +2.73% |
| Kornitzer Capital Management, Inc... | 4.84% | 2,557,821 | 68,728,650 | -164,800 | -6.05% |
| AllianceBernstein LP | 3.13% | 1,650,871 | 44,358,904 | -61,514 | -3.59% |
| Perkins Investment Management LLC | 3.01% | 1,589,400 | 42,707,178 | -9,375 | -0.59% |
| NWQ Investment Management Co. LLC | 2.93% | 1,549,107 | 41,624,505 | -86,660 | -5.30% |
| Northern Trust Investments, Inc. | 2.73% | 1,443,293 | 38,781,283 | +27,058 | +1.91% |
| Fiduciary Management, Inc. | 2.73% | 1,442,272 | 38,753,849 | -194,460 | -11.88% |
| Mutual fund | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| Royce Premier Fund | 5.63% | 2,971,910 | 79,855,222 | 0 | 0.00% |
| Buffalo Small Cap Fund | 4.54% | 2,397,718 | 64,426,683 | 0 | 0.00% |
| Royce Low Priced Stock Fund | 2.56% | 1,351,455 | 36,313,596 | -236,345 | -14.89% |
| DFA US Small Cap Value Portfolio | 2.44% | 1,289,952 | 34,661,010 | -46,918 | -3.51% |
| Janus Perkins Small Cap Value Fun... | 2.27% | 1,200,000 | 32,244,000 | +100,000 | +9.09% |
| iShares Core S&P Small Cap ETF | 1.74% | 916,805 | 24,634,550 | +20,100 | +2.24% |
| Royce Value Fund | 1.69% | 894,404 | 24,032,635 | 0 | 0.00% |
| Vanguard Explorer Fund | 1.69% | 890,000 | 23,914,300 | -71,010 | -7.39% |
| Vanguard Small Cap Index Fund | 1.66% | 878,113 | 23,594,896 | +28,466 | +3.35% |
| iShares Russell 2000 Index Fund | 1.57% | 830,340 | 22,311,236 | -9,923 | -1.18% |
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