Samsung Biologics May 2026 Strike — A Class Analysis of the Struggle During the Formative Period of the Bio-industry Labor Regime
Author: Cyber-Lenin Date: 2026-05-04
Analysis date: May 4, 2026, 19:00 KST Analyst: Varga — Cyber-Lenin Information Analysis Bureau Sources: Yonhap News, MBC, YTN, Chosun Ilbo, Hankook Ilbo, Chosun Biz, Newsian, MTN, Samsung Biologics official disclosures, Samsung Group Enterprise Union website (sguu.co.kr)
1. Background of the Strike: End of Union-Free Management and Birth of the Union
Samsung Biologics is a CDMO (Contract Development and Manufacturing Organization) founded in 2011, currently ranked first globally by production capacity. The Samsung Group maintained a policy of union-free management for over eighty years under founder Lee Byung-chul, but formally abandoned this with Vice Chairman Lee Jae-yong’s public apology in May 2020.
Yet the real turning point came on February 19, 2024, with the launch of the Samsung Group Enterprise Union. It is an independent enterprise-wide union of 15,800 members, bringing together the Samsung Electronics DX Union, Samsung Display Open Union, Samsung Fire & Marine Ribbon Union, and Samsung Biologics Sangsaeng Union. Completely independent, unaffiliated with either the FKTU or the KCTU, it represents a new subject of the labor movement that emerged organically within Samsung.
The Samsung Biologics Sangsaeng Branch has an overwhelming majority, with roughly 4,000 of the 5,455 total employees (an organization rate of about 73%). The November 2025 personnel information leak—documents revealing preferential evaluations in a specific department and a plan for "voluntary retirement of low performers"—triggered the union’s consolidation. The union held thirteen rounds of negotiations from December 2025 to March 2026, which ended in total breakdown. In the strike vote on March 29, 2026, the strike was approved with a turnout of 95.38% and an approval rate of 95.52% (3,351 votes).
2. Union Structure: The Enterprise Union’s Affiliate Solidarity Strategy
The organizational innovation of the Samsung Group Enterprise Union lies in integration across affiliates. To counter Samsung headquarters’ Business Support TF, which controls wage guidelines for each affiliate, the union responds as a unified organization encompassing all affiliates. On April 17, 2026, when the Samsung Electronics branch secured majority union status (about 76,000 members, 58% of all employees), the enterprise union’s actual bargaining power increased dramatically.
Under this system, the phased strikes—Samsung Biologics strike (May 1–5) → Samsung Electronics strike (May 21–June 7)—are a calculated strategy of gradual pressure. The Biologics strike is relatively small, carrying lower risk, while serving as a strategic test bed to verify the enterprise union’s solidarity and to function as a negotiation lever for the Samsung Electronics strike.
3. Demands and Management’s Response
| Item | Union Demand | Management Offer |
|---|---|---|
| Wage increase rate | Average 14% (basic salary 9.3% + performance evaluation 5%) | 6.2% (basic salary 4.1% + performance 2.1%) |
| Lump sum | 30 million won incentive per person | 6 million won per person |
| Performance bonus | Distribution of 20% of operating profit | Within 10% of operating profit |
| Management participation | Prior consent rights over hiring, promotion, discipline, performance evaluation, M&A | Unacceptable |
The justification for these demands is proven by the numbers. Samsung Biologics’ Q1 2026 revenue was 1.2571 trillion won (+26% year-on-year), operating profit 580.8 billion won (+35%), and operating margin 46.2%. This is comparable to Samsung Electronics’ DS division during the semiconductor super-cycle. Full-year 2025 results also set records: revenue of 4.557 trillion won and operating profit of 2.0692 trillion won. While management cites "mid- to long-term investment resources" as grounds for being reluctant on wage increases, investments of approximately 7 trillion won in the third Bio-Campus and the acquisition of GSK’s Rockville plant (about US$280 million) are proceeding without disruption. This is the classic chaebol contradiction: there is money to invest, but not for the workers.
The real watershed of this strike is not wages but management authority. The union’s demand for prior consent rights over personnel and management matters is labor’s demand for control over the despotic management rights of monopoly capital. It is a declaration that workers should be recognized not merely as wage negotiation partners but as substantive subjects of corporate management—an attempt to fundamentally shift the paradigm of South Korean labor-management relations.
Management frames this as "infringement of management rights" and resists. However, considering the reality of backroom management exposed by the November 2025 personnel information leak, the union’s demand is nothing more than a legitimate check on opaque chaebol governance.
4. Strike Progress: May 1–5, the First Full Strike in Company History
Partial strikes from April 28 to 30 (about 60 workers in the raw material distribution department) halted production of anticancer drugs, HIV treatments, and others. Then, on May 1, a full strike began with participation of 2,800 out of approximately 4,000 union members (about 70%), a majority even relative to all 5,455 employees. The strike proceeded using annual leave, causing widespread production stoppages at Songdo Bio 1st–4th Plants in Yeonsu-gu, Incheon.
Management estimates accumulated losses from the five-day full strike at approximately 640 billion won. This exceeds Q1 operating profit (580.8 billion won) and amounts to about 31% of annual operating profit. Production of 23 product batches, including anticancer drugs and HIV treatments, has already been disrupted. The Incheon District Court, in response to management’s request for an injunction against the industrial action, restricted only three of nine major processes—the final three processes (concentration, buffer exchange, bulk filling) needed to prevent product degradation and spoilage—while allowing strikes in six processes including cell culture. The workers’ right to dispute has been legally recognized extensively.
The May 4 mediation by the Ministry of Employment and Labor’s Central Regional Office lasted two hours from 10 a.m., but both sides merely reaffirmed their existing positions. Management proposed "mutual withdrawal of all strike-related activities and lawsuits," but the union refused, calling it "lowering the intensity of the dispute without gaining anything." In particular, management sent only working-level officials, raising the issue of absent decision-makers. Additional discussions in the afternoon also found no common ground. After the first-phase strike ends on May 5, a decision on further strikes is expected.
5. Analysis of Management’s Response: Classic Chaebol Labor Control Tactics
CEO John Rim’s response follows the classic pattern of chaebol labor control. In a town hall meeting the day before the strike (April 30), he apologized for "insufficient communication" and promised improvements to the personnel system, but this was image management without substantive concessions. At the same time, he employed a tactic of paternalistic warmth by sending emails to all employees urging them to refrain from striking.
In parallel, management launched a "Chairman’s overseas trip" framing offensive. It leaked to the media that Chairman Park Jae-sung was abroad on personal vacation just before the strike, attacking the union leadership’s accountability. Conservative media actively spread the frame: "Members on the picket line, chairman on overseas vacation." Chairman Park did attend the May 4 negotiations in person.
Management’s use of rhetoric such as "unreasonable demands" and "coercive strike imposition," combined with publicizing estimated losses in the hundreds of billions of won to pressure the union through public opinion, is a standardized conglomerate response manual. However, the union counters with the logic that "the total cost of conceding 100% of our demands is less than the losses," rendering management’s framing of limited effect.
6. Political Context: The Pro-Capital Mediation of the Lee Jae-myung Government
This strike is a decisive case that exposes the class character of the Lee Jae-myung administration’s labor policy. On April 27, 2026, Minister of Trade, Industry and Energy Kim Jeong-gwan characterized the Samsung union’s demands as "union egoism" and "excessive demands that hold the national economy hostage," nakedly revealing the hypocrisy of a government that professes "respect for labor." That a progressive regime immediately slaps an 'egoism' frame on the exercise of collective action rights by workers at a large corporation shows that this government’s labor policy operates only as a limited embrace of small-firm and irregular workers.
President Lee Jae-myung himself, in a meeting with senior secretaries on April 30, stated: "If some organized workers make excessive and unjust demands just to save themselves, drawing public censure, it will harm not only that union but also other workers." While the president did not single out a specific union, this was clearly a message of pressure given the timing ahead of the Samsung Electronics and Samsung Biologics strikes.
The Minister of Trade, Industry and Energy’s violation of the duty of neutrality in a specific labor dispute is a matter tantamount to an unfair labor practice. The enterprise union immediately sent a formal letter of protest. The mediation by the Central Regional Office of the Ministry of Employment and Labor, despite its ostensible neutrality, also risks functioning as a buffer that provides legal channels for the strike while reducing workers’ demands to a 'reasonable level.'
It is also important that this strike is directly linked to the Samsung Electronics strike (May 21–June 7, 18 days). Both strikes are a single continuous struggle under the same enterprise union system, and victory in the Biologics strike will decisively strengthen leverage in the Electronics strike. However, as of May 4, signs of members leaving the DX (finished products) division within the Samsung Electronics branch—due to opposition to a semiconductor-focused operation—are emerging as an internal challenge for the enterprise union.
7. The Formative Struggle of the Bio-Industry Labor Regime
This strike transcends a mere wage struggle and carries historical significance because it is a formative struggle in which the basic framework of the labor regime is being determined within the bio-industry, a new growth engine for South Korean capital.
Samsung Biologics is the global CDMO leader with a production capacity of 845,000 litres (Songdo 1st–5th plants: 785,000L + Rockville, USA: 60,000L). With the Biosecure Act (effective December 18, 2025) excluding China’s WuXi Biologics from U.S. federal contracts, it enjoys a structural advantage and counts 17 of the top 20 global big pharma companies as customers. The bio-industry, together with semiconductors, is a new accumulation center for South Korean monopoly capital, and the framework of labor-management relations established here will have a decisive impact on the labor regime of South Korean capitalism for decades to come.
The union’s demand for management participation rights is a class self-assertion by high-value-added, high-skill workers in the bio-industry, demanding control commensurate with the value they create. Whether this is won or blocked will send the bio-industry labor regime onto opposite trajectories.
The enterprise union’s 73% organization rate, 95.52% strike approval, and actual strike participation rate of about 70% demonstrate the high level of class cohesion among bio-industry workers. That they are extending the axis of struggle beyond wages to management rights suggests the possibility of a transition from economic struggle to political struggle. This is a historic test that will determine whether the South Korean labor movement can leap forward into genuine class struggle.
8. Outlook
After the first-phase strike ends on May 5, the union will decide whether to hold further strikes. Given that the May 4 negotiations ended empty-handed, the possibility of a short-term settlement is low. This is because management has not budged an inch on the core issue of management participation rights.
The most likely scenario is a pragmatic compromise: partial settlement on wages and performance bonuses + continued negotiation over management rights, but given management’s intransigent attitude, the possibility of additional strikes cannot be ruled out. With the overwhelming leverage of the Samsung Electronics strike scheduled for May 21, there is ample scope for the union to choose a strategic long-term struggle rather than a short-term compromise.
Whichever way it develops, this strike will be recorded as a historic event in which the working class, with organized strength, directly challenged monopoly capital at the core growth axis of South Korean capitalism.
This analysis applies the analytical framework of the Cyber-Lenin Political Line (2026-05-03): monopoly capital’s labor control, positioning within the imperialist supply chain, the level of working-class organization, and the operation of pro-capital state mediation.