| 1 | Essex Woodlands Management, Inc. | 13,021,324 | $96.9M | 30.44% | Share |
| 2 | Juniper Investment Company, LLC | 6,939,357 | $51.6M | 17.75% | Share |
| 3 | Nantahala Capital Management, LLC | 6,047,403 | $45.0M | 1.49% | Share |
| 4 | VANGUARD GROUP INC | 2,579,907 | $19.2M | 0.00% | Share |
| 5 | BlackRock, Inc. | 1,698,133 | $12.0M | 0.00% | Share |
| 6 | ROYCE & ASSOCIATES LP | 1,251,282 | $9.3M | 0.09% | Share |
| 7 | BlackRock, Inc. | 1,152,095 | $8.0M | 0.00% | Share |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 968,094 | $7.0M | 0.00% | Share |
| 9 | STATE STREET CORP | 891,024 | $6.0M | 0.00% | Share |
| 10 | AMERICAN CENTURY COMPANIES INC | 847,791 | $6.0M | 0.00% | Share |
| 11 | DIMENSIONAL FUND ADVISORS LP | 701,020 | $5.0M | 0.00% | Share |
| 12 | OBERWEIS ASSET MANAGEMENT INC/ | 616,614 | $4.6M | 0.17% | Share |
| 13 | RENAISSANCE TECHNOLOGIES LLC | 615,100 | $4.0M | 0.01% | Share |
| 14 | Eversept Partners, LP | 471,257 | $3.5M | 0.18% | Share |
| 15 | KENNEDY CAPITAL MANAGEMENT LLC | 462,559 | $3.4M | 0.07% | Share |
| 16 | Buckley Capital Advisors, LLC | 404,669 | $3.0M | 2.12% | Share |
| 17 | Qube Research & Technologies Ltd | 449,006 | $3.0M | 0.00% | Share |
| 18 | AQR CAPITAL MANAGEMENT LLC | 443,232 | $3.0M | 0.00% | Share |
| 19 | ESSEX INVESTMENT MANAGEMENT CO LLC | 387,886 | $2.9M | 0.44% | Share |
| 20 | Meros Investment Management, LP | 315,160 | $2.3M | 0.93% | Share |
| 21 | VANGUARD GROUP INC | 307,468 | $2.3M | 0.00% | Share |
| 22 | Knights of Columbus Asset Advisors LLC | 290,285 | $2.2M | 0.12% | Share |
| 23 | FMR LLC | 366,454 | $2.0M | 0.00% | Share |
| 24 | NORTHERN TRUST CORP | 342,659 | $2.0M | 0.00% | Share |
| 25 | Hillsdale Investment Management Inc. | 269,909 | $2.0M | 0.06% | Share |
| 26 | BNP PARIBAS FINANCIAL MARKETS | 325,864 | $2.0M | 0.00% | Share |
| 27 | MARSHALL WACE, LLP | 277,898 | $2.0M | 0.00% | Share |
| 28 | GOLDMAN SACHS GROUP INC | 344,517 | $2.0M | 0.00% | Share |
| 29 | D. E. Shaw & Co., Inc. | 358,257 | $2.0M | 0.00% | Share |
| 30 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 375,173 | $2.0M | 0.00% | Share |
| 31 | TWO SIGMA INVESTMENTS, LP | 268,833 | $2.0M | 0.00% | Share |
| 32 | LAZARD ASSET MANAGEMENT LLC | 270,509 | $2.0M | 0.00% | Share |
| 33 | TOCQUEVILLE ASSET MANAGEMENT L.P. | 330,000 | $2.0M | 0.03% | Share |
| 34 | Divisadero Street Capital Management, LP | 183,131 | $1.4M | 0.06% | Share |
| 35 | Legato Capital Management LLC | 137,562 | $1.0M | 0.09% | Share |
| 36 | Squarepoint Ops LLC | 191,173 | $1.0M | 0.00% | Share |
| 37 | MORGAN STANLEY | 146,617 | $1.0M | 0.00% | Share |
| 38 | BlackRock, Inc. | 139,241 | $1.0M | 0.00% | Share |
| 39 | JANE STREET GROUP, LLC | 159,363 | $1.0M | 0.00% | Share |
| 40 | Mariner, LLC | 160,312 | $1.0M | 0.00% | Share |
| 41 | PANAGORA ASSET MANAGEMENT INC | 178,064 | $1.0M | 0.00% | Share |
| 42 | GEODE CAPITAL MANAGEMENT, LLC | 152,144 | $1.0M | 0.00% | Share |
| 43 | Nuveen, LLC | 141,985 | $1.0M | 0.00% | Share |
| 44 | Trexquant Investment LP | 131,848 | $980K | 0.01% | Share |
| 45 | COMERICA BANK | 88,000 | $654K | 0.00% | Share |
| 46 | UBS Group AG | 80,210 | $596K | 0.00% | Share |
| 47 | PRINCIPAL FINANCIAL GROUP INC | 78,587 | $584K | 0.00% | Share |
| 48 | GLOBEFLEX CAPITAL L P | 77,116 | $573K | 0.09% | Share |
| 49 | Allspring Global Investments Holdings, LLC | 71,688 | $533K | 0.00% | Share |
| 50 | PDT Partners, LLC | 55,229 | $410K | 0.03% | Share |