Musim 1

Di awal seri, keluarga Roy berkumpul untuk merayakan ulang tahun Logan yang ke-80, di mana diasumsikan bahwa Logan akan mengundurkan diri sebagai CEO dan menunjuk Kendall sebagai penggantinya. Namun, ia mengejutkan keluarganya saat ia mengumumkan akan tetap menjabat sebagai CEO dan menyerahkan dokumen yang menunjuk Marcia sebagai wali amanat utamanya setelah kematiannya. Logan menderita stroke yang melemahkan di hari yang sama dan dirawat di rumah sakit, tempat keluarga dan lingkaran dalamnya berdebat tentang cara mengelola perusahaan sementara dia tidak mampu bekerja. Logan segera pulih dan mengumumkan di sebuah acara gala bahwa ia akan tetap menjadi CEO, tetapi terus menunjukkan perilaku yang tidak menentu. Kendall merencanakan mosi tidak percaya terhadap ayahnya bersama dengan Roman dan beberapa anggota manajemen senior perusahaan, tetapi akhirnya gagal, sebagian karena Logan menolak meninggalkan ruangan selama pemungutan suara dan malah memarahi beberapa anggota dewan agar berpihak padanya, sambil memecat semua orang yang memilih mosi tersebut (termasuk Kendall).

Selama beberapa bulan berikutnya, Logan tetap berselisih dengan anak-anaknya: Shiv bekerja sebagai konsultan politik untuk calon presiden Gil Eavis, seorang Senator Demokrat yang membenci Logan dan Waystar, sementara Kendall - seorang pecandu yang sedang dalam masa pemulihan - kambuh dan menggagalkan sesi terapi keluarga yang dimaksudkan untuk meredakan kekhawatiran publik atas stabilitas perusahaan. Di pesta pernikahan Shiv, Logan mengetahui bahwa Kendall telah merencanakan pengambilalihan secara paksa perusahaan bersama temannya Stewy dan musuh bebuyutan Logan, Sandy Furness. Setelah Kendall yang kecanduan narkoba mengalami kecelakaan mobil yang mengakibatkan kematian seorang pemasok katering dari pernikahan, Logan menutupi keterlibatan Kendall dan menggunakan kejahatan itu sebagai pengaruh untuk memaksanya mundur dari pengambilalihan. Kendall yang trauma menjadi sangat setia kepada Logan, yang menggunakan putranya yang patuh untuk membantunya melawan tawaran pengambilalihan.

Musim 2

With Stewy and Sandy's takeover bid shoring up shareholder support, Logan's financier and close associates all advise that he sell the company, citing the declining relevance of legacy media in the 21st-century corporate landscape. Logan steadfastly refuses to give up his empire and decides to acquire rival news conglomerate Pierce Global Media (PGM), hoping to make Waystar too large for competitors to buy out. However, the deal falls through after the publication of a major news story exposing Waystar's decades-long cover-up of sexual exploitation on the company's cruise lines. Pierce's CEO Rhea Jarrell remains loyal to Logan after being fired from PGM and helps him navigate the company through the scandal; Logan becomes infatuated with her and eventually names her his successor, alienating Marcia. After a company whistleblower goes public with further details on the scandal, the Roys are called to testify before the Senate. Logan realizes that in order to appease the company's shareholders, he must publicly sacrifice someone close to him as a scapegoat for the scandal. Though the shareholders advise that Logan take responsibility, Logan instead chooses Kendall, who was acting CEO when the scandal was being covered up. Kendall obliges, but reverses course during a press conference the next morning by naming his father responsible for the company's historic complicity in the crimes.

Season 3

In the wake of Kendall's announcement, Logan temporarily steps back as CEO (appointing Gerri as his interim placement), negotiates a settlement with Marcia to ensure her cooperation, and names Shiv Waystar's President of Domestic Operations. Logan experiences a resurgence in health complications upon returning to New York, forcing his children to make a settlement with Sandy and Stewy without his input during the company's annual shareholder meeting. After Waystar and the Department of Justice also reach a settlement, Logan attempts to acquire streaming giant GoJo, but the company's CEO Lukas Matsson instead proposes the opposite, assuring Logan he will continue to control key assets. Logan decides to take up Matsson's offer without consulting his children, whose chances of leading the company are jeopardized with Matsson in control. Kendall, Shiv and Roman attempt to veto their father's decision via their stake in the family holding company. However, Logan and Caroline renegotiate their divorce settlement in time to deprive the children of their voting power, effectively leaving them powerless within the company. Tom is revealed to have tipped off Logan on his children's revolt.

Season 4

Months later, Logan remains estranged from his children. On the eve of the GoJo acquisition, Sandi and Stewy convince the siblings to delay the board vote to increase the price of the sale, forcing Logan to attempt reconciliation with his children. Kendall and Shiv refuse to budge, unsuccessfully demanding an apology from their father for his betrayal and his cruel parenting. Logan is then left no choice but to go to Sweden to renegotiate the deal with Matsson, but he suddenly dies on the flight from a pulmonary embolism, with only Tom and some of his other senior team by his side. Tom phones the children - who are attending Connor's wedding - to give them a chance to say goodbye. The plane is turned around and Logan is pronounced dead on arrival; the siblings make a statement announcing his death to the press, then watch as his body is removed from the plane.

During Logan's wake, an undated document is found in his safe naming Kendall his successor upon his death, with several pencil addenda included, including a strike on "Kendall Roy" that could be either underlining or crossing-out the name. Kendall and Roman eventually decide to run the company together as co-CEOs, since the company's succession plan formally dictated leadership be passed down to COO - Roman's role at the time. Following his death, Logan appears posthumously in two recordings - the first for the assisted living community Living+ and the second an archival recording of a dinner party with his employees and Connor, of which his children Kendall, Roman, and Shiv become emotional upon viewing.