Ownership as of September 30, 2020. Twenty largest shareholders.
| Name | Series A shares | Series B shares | Share capital % | Voting rights % |
| ANNWALL & ROTHSCHILD INVESTMENTS AB | 377 736 | 410 478 | 7,02 | 28,63 |
| ÖHMAN BANK S.A. | - | 1 174 017 | 10,46 | 8,03 |
| FJÄRDE AP FONDEN | - | 1 112 919 | 9,91 | 7,61 |
| SWEDBANK ROBUR NY TEKNIK BTI | - | 579 172 | 5,16 | 3,96 |
| AMF AKTIEFOND SMÅBOLAG | - | 501 585 | 4,47 | 3,43 |
| TREDJE AP-FONDEN | - | 488 565 | 4,35 | 3,34 |
| UNIONEN | - | 447 196 | 3,98 | 3,06 |
| HANDELSBANKEN SVENSKA, SMABOLAGSFOND | - | 370 000 | 3,30 | 2,53 |
| CBNY-NORGES BANK | - | 353 220 | 2,92 | 2,24 |
| DANGOOR, DAVID | - | 281 260 | 2,52 | 1,94 |
| RBC INVESTOR SERVICES BANK S.A | - | 263 954 | 2,35 | 1,80 |
| ANDRA AP-FONDEN | - | 263 500 | 2,35 | 1,80 |
| ÅLANDSBANKEN I ÄGARES STÄLLE | - | 239 919 | 2,14 | 1,64 |
| HANDELSBANKEN MICROCAP SVERIGE | - | 238 461 | 2,12 | 1,63 |
| BANQUE PICTET & CIE SA, W8IMY (WITHOUT P.R. | - | 235 380 | 2,10 | 1,61 |
| LÄNSFÖRSÄKRINGAR SMÅBOLAG SVERIGE | - | 195 709 | 1,74 | 1,34 |
| FÖRSÄKRINGSAKTIEBOLAGET, AVANZA PENSION | - | 185 361 | 1,65 | 1,27 |
| NORDNET PENSIONSF÷RSƒKRING AB | - | 143 228 | 1,28 | 0,98 |
| HANVAD INVEST AKTIEBOLAG | - | 136 593 | 1,22 | 0,93 |
| SEB AB, LUXEMBOURG BRANCH, W8IMY | - | 120 582 | 1,07 | 0,82 |
| Sub-total | 377 736 | 7 741 099 | 72,11 | 78,59 |
| Other shareholders | - | 3 107 349 | 27,89 | 21,41 |
| Total | 377 736 | 10 848 448 | 100 | 100 |
Source: Euroclear Sweden AB
The total registered share capital of Infant Bacterial Therapeutics AB consists of 377,736 class A shares with 10 votes per share and 10,848,448 class B shares with one vote per share, in total 11,226,184 shares.