This book is originally written as the author's Law Master's thesis. The book analyses horizontal shareholder conflicts arising from mergers across four jurisdictions by applying a comparative analysis method. The four analysed jurisdictions in this book are: (i) The United Kingdom (ii) The United States of America (iii) Germany and (iv) Turkey. The results yielded by the comparison are supported by empirical evidence found across the analysed jurisdictions. The book concludes with a final assessment.