Soh Chee Wen v Public Prosecutor and another appeal [2025] SGCA 49

Case Details

• Citation: [2025] SGCA 49
• Court: Court of Appeal of the Republic of Singapore
• Decision Date: 10 October 2025
• Coram: Sundaresh Menon CJ, Tay Yong Kwang JCA and Andrew Phang Boon Leong SJ
• Case Number: CA/CCA 40/2022; CA/CCA 41/2022
• Hearing Date(s): 3 March, 5–6, 8 May, 10 October 2025
• Appellants: Soh Chee Wen (First Appellant); Quah Su-Ling (Second Appellant)
• Respondent: Public Prosecutor
• Counsel for First Appellant: Narayanan Sreenivasan SC, Lim Wei Liang Jason (Sreenivasan Chambers LLC)
• Counsel for Second Appellant: Sivananthan Nithyanantham (David Nayar and Associates)
• Counsel for Respondent: Nicholas Tan Beng Leong, David Koh Yi-Da, Regina Lim Siew Mei, Michelle Tay, Yee Jia Rong and Louis Ngia Jin Liang (Attorney-General’s Chambers)
• Practice Areas: Criminal Law; Statutory offences; Securities and Futures Act; Criminal Conspiracy

Summary

The judgment in Soh Chee Wen v Public Prosecutor and another appeal [2025] SGCA 49 represents the culmination of one of the most complex and extensive criminal prosecutions in the history of Singapore’s financial markets. The case involves the appeals of Soh Chee Wen (the "First Appellant") and Quah Su-Ling (the "Second Appellant") against their convictions and sentences arising from a massive market manipulation scheme involving the shares of Blumont Group Limited, Asiasons Capital Ltd, and LionGold Corp Ltd (collectively, "BAL"). The scheme, which operated between 1 August 2012 and 3 October 2013, resulted in a catastrophic market collapse in October 2013, wiping out billions of dollars in market capitalization.

The Court of Appeal was tasked with reviewing a trial record of unprecedented proportions. The High Court judgment under appeal, [2023] SGHC 299, spanned 895 pages and 1,493 paragraphs. The Appellants faced a combined total of hundreds of charges, including conspiracy to commit false trading and market rigging under the Securities and Futures Act (Cap 289, 2006 Rev Ed) (the "SFA"), cheating financial institutions, perverting the course of justice, and unauthorized management of companies by an undischarged bankrupt under the Companies Act (Cap 50, 2006 Rev Ed).

A central legal pillar of the Court of Appeal’s decision is the characterization of criminal conspiracy under s 120B of the Penal Code as a "continuing offence." The Appellants had argued that the Conspiracy Charges were legally defective, duplicitous, and insufficiently particularized. They contended that the Prosecution had "lumped together" multiple distinct agreements into single charges, thereby causing prejudice. The Court of Appeal rejected these arguments, affirming that a conspiracy continues for as long as the parties remain party to the agreement to carry out the unlawful plan. This doctrinal clarification provides the Prosecution with significant latitude in framing charges for long-running criminal enterprises.

Ultimately, the Court of Appeal dismissed the appeals against conviction in their entirety. The court found that the trial judge had meticulously evaluated the evidence, including the testimony of numerous witnesses and a vast trail of digital and documentary evidence. The court emphasized the high threshold for appellate intervention in factual findings, particularly those based on the trial judge’s assessment of witness credibility. The judgment reinforces the integrity of Singapore’s securities regulatory framework and the judiciary's capacity to adjudicate highly technical white-collar crimes involving sophisticated manipulative techniques and extensive webs of proxy accounts.

Timeline of Events

1. 31 October 2011: Earliest date referenced in the factual matrix regarding the background of the parties' financial activities.
2. 29 January 2012: Date noted in the chronological evidence regarding preliminary financial arrangements.
3. 8 July 2012: Further preparatory actions identified in the lead-up to the Relevant Period.
4. 1 August 2012: Commencement of the "Relevant Period" for the alleged market manipulation scheme. The Appellants began masterminding the scheme to manipulate BAL shares.
5. 2 January 2013: Significant trading activity and account coordination observed during the height of the scheme.
6. 12 March 2013: Specific date identified in the evidence regarding coordination of trading instructions.
7. 15 March 2013: Further coordination of trades and financing arrangements for BAL shares.
8. 18 March 2013: Continued illegitimate trading activity across the web of 189 accounts.
9. 19 May 2013: Date associated with specific transactions and communications between the Appellants.
10. 23 July 2013: Critical phase of the scheme involving high-volume trading to maintain share prices.
11. 1 August 2013: One year into the scheme; the manipulation of BAL shares continued unabated.
12. 2 October 2013: The day before the market collapse; peak manipulation activity recorded.
13. 3 October 2013: Conclusion of the "Relevant Period." The BAL share prices collapsed, leading to the intervention of market regulators.
14. 7 October 2013: Immediate aftermath of the collapse and commencement of regulatory inquiries.
15. 24 June 2015: Significant date in the investigative timeline involving the gathering of documentary evidence.
16. 7 December 2016: Formal commencement of certain legal processes or arrests related to the investigation.
17. 14 July 2017: Further procedural developments in the investigation of the 189 trading accounts.
18. 25 March 2019: Commencement of the trial in the High Court under case number HC/CC 9/2019 ("CC 9").
19. 15 July 2019: Mid-trial procedural hearings and evidence presentation.
20. 27 August 2019: Continuation of the substantive trial tranches.
21. 1 October 2019: Focus on the witness tampering and perverting the course of justice charges.
22. 3 October 2019: Six-year anniversary of the collapse; trial continues with focus on the SFA charges.
23. 8 January 2020: Resumption of trial after the year-end break.
24. 9 January 2020: Detailed evidence regarding the 60 individuals and companies used as proxies.
25. 3 March 2020: Trial proceedings impacted by the early stages of the global pandemic but continuing with focus on documentary exhibits.
26. 3 July 2020: Evidence regarding the financing obtained from 20 financial institutions.
27. 5 October 2020: Late-stage trial evidence regarding the First Appellant's management of companies while bankrupt.
28. 13 October 2020: Closing of the Prosecution's case in certain tranches.
29. 19 October 2020: Commencement of the Defence's case.
30. 24 February 2021: Cross-examination of the Appellants.
31. 3 March 2021: Further testimony from the Appellants regarding their lack of "control" over accounts.
32. 10 March 2021: Expert evidence regarding market manipulation techniques.
33. 11 March 2021: Conclusion of expert testimony.
34. 11 May 2021: Final submissions on the conviction stage.
35. 24 May 2021: Clarifications sought by the trial judge on the 189 accounts.
36. 11 June 2021: Final procedural matters before the judgment was reserved.
37. 16 June 2021: Last date of the substantive trial hearings for the conviction tranche.
38. 6 June 2022: Delivery of the High Court's verdict on convictions.
39. 27 August 2024: Procedural timelines for the appeal to the Court of Appeal.
40. 17 January 2025: Filing of final appellate briefs.
41. 3 March 2025: Commencement of the substantive appeal hearing before the Court of Appeal.
42. 5–6, 8 May 2025: Continued appellate arguments.
43. 10 October 2025: Delivery of the Court of Appeal judgment dismissing the appeals against conviction.

What Were the Facts of This Case?

The factual matrix of this case centers on what the Prosecution described as a "masterminded scheme" to manipulate the market for BAL shares. The Appellants, Soh Chee Wen and Quah Su-Ling, were alleged to have orchestrated this scheme between 1 August 2012 and 3 October 2013. The scale of the operation was vast: it involved the coordinated use of 189 trading accounts held at 20 different financial institutions. These accounts were not in the names of the Appellants but were instead held by a network of 60 individuals and companies, who acted as proxies or nominees.

The Prosecution’s case was that the Appellants exercised de facto control over these 189 accounts. This control allowed them to conduct "illegitimate trading activity," which included wash trades (trades where there is no change in beneficial ownership) and matched orders, designed to create a false appearance of active trading and to artificially support or inflate the share prices of Blumont, Asiasons, and LionGold. The scheme was further fueled by significant financing obtained from financial institutions, often through margin trading facilities secured against the very shares being manipulated.

The First Appellant, Soh Chee Wen, was an undischarged bankrupt during the Relevant Period. Despite this, he was alleged to have been heavily involved in the management of several companies, which formed the basis of the "Company Management Charges" under s 148(1) of the Companies Act. The Second Appellant, Quah Su-Ling, was the Chief Executive Officer of IPCO International Limited and was closely associated with Soh in both personal and business capacities.

The "BAL" shares experienced a meteoric rise during the Relevant Period. For instance, Blumont’s share price rose by over 1,000% before the collapse. On 4 October 2013, the Singapore Exchange (SGX) designated the BAL shares, and their prices plummeted, losing over 90% of their value in a matter of days. This collapse triggered a massive investigation by the Commercial Affairs Department (CAD) and the Monetary Authority of Singapore (MAS).

During the investigation, the First Appellant was further alleged to have engaged in witness tampering. Specifically, he was charged with five counts of perverting the course of justice contrary to s 204A of the Penal Code and three counts of attempting to do so. These charges involved Soh allegedly instructing or influencing key witnesses to provide false information to the CAD investigators to conceal the Appellants' control over the 189 trading accounts.

The trial in the High Court was divided into tranches. The first and most substantial tranche dealt with the market manipulation and cheating charges. The Prosecution relied on a mountain of evidence, including:

• Trading data from the 189 accounts showing patterns of coordinated trading.
• Testimony from the account holders (the "proxies"), many of whom testified that they had handed over control of their accounts to the Appellants.
• Digital evidence, including thousands of SMS and WhatsApp messages between the Appellants and various brokers and proxies.
• Evidence of the "Soh-Quah" relationship and their joint operation of the "command center" for the trades.

The Appellants’ primary defense was a denial of control. They argued that the 189 accounts were controlled by the individual account holders or other third parties. They contended that their involvement was merely advisory or that they were being framed by witnesses who were themselves complicit and were "cutting deals" with the Prosecution. The First Appellant specifically argued that his interactions with witnesses were not attempts to suborn perjury but were legitimate discussions about the investigation.

The High Court judge, after a 200-day trial, found the Appellants guilty of the vast majority of the charges. The judge found that the evidence of control was "overwhelming" and that the Appellants had indeed masterminded the scheme. The judge also found the First Appellant guilty of the witness tampering charges, concluding that he had actively sought to derail the investigation.

What Were the Key Legal Issues?

The appeal to the Court of Appeal raised several critical legal issues, ranging from procedural challenges to the framing of charges to substantive challenges regarding the elements of criminal conspiracy and market manipulation.

The primary legal issues included:

• The Legality of the Conspiracy Charges: Whether the charges under s 120B of the Penal Code were defective for being duplicitous or insufficiently particularized. The Appellants argued that the Prosecution had improperly combined multiple distinct conspiracies into single charges, thereby violating the principle that each charge should represent a single offence.
• The Nature of Criminal Conspiracy as a Continuing Offence: Whether a conspiracy is a "one-off" event that occurs at the moment of agreement or a "continuing offence" that persists as long as the agreement is in effect. This had significant implications for how the "Relevant Period" in the charges was interpreted.
• The Standard for Appellate Review of Factual Findings: The extent to which the Court of Appeal should defer to the trial judge’s findings on witness credibility and the "control" of the 189 trading accounts. The Appellants argued that the trial judge had failed to properly account for the motives of the Prosecution's witnesses to lie.
• The Interpretation of s 197(1)(b) of the SFA: Whether the Prosecution had proven the necessary mens rea and actus reus for false trading and market rigging, particularly in the context of "wash trades" and "matched orders."
• The Elements of Perverting the Course of Justice: Whether the First Appellant’s actions met the threshold for "perverting the course of justice" under s 204A of the Penal Code, especially where the witnesses had not yet given formal statements or testimony.
• The Application of s 148(1) of the Companies Act: What constitutes "taking part in the management" of a company by an undischarged bankrupt, and whether the First Appellant’s activities fell within this prohibition.

These issues required the Court of Appeal to balance the need for procedural fairness in the framing of charges against the practical realities of prosecuting large-scale, complex criminal conspiracies that span years and involve hundreds of individual acts.

How Did the Court Analyse the Issues?

The Court of Appeal’s analysis was exhaustive, reflecting the 174-page length of the judgment. The court, led by Sundaresh Menon CJ, systematically addressed each of the Appellants' arguments.

1. The Nature of Criminal Conspiracy

The court first addressed the fundamental challenge to the Conspiracy Charges. The Appellants argued that the charges were duplicitous because they alleged a single conspiracy over a long period (the "Relevant Period"), whereas the evidence might suggest multiple smaller agreements. The court rejected this, relying on the doctrine that criminal conspiracy is a continuing offence. Citing Public Prosecutor v Khoo Ban Hock & ors [1988] 2 MLJ 217, the court held:

"a criminal conspiracy is a continuing offence. The offence is committed once the parties arrive at an agreement, but the offence does not conclude upon such agreement. Instead, it continues for as long as the accused persons remain party to the agreement to carry out the plan." (at [18])

This finding was pivotal. It meant that the Prosecution was entitled to charge the Appellants for a specified period of their offending, even if that period did not encompass the entire duration of the conspiracy. The court noted that "it was open to the Prosecution to charge the Appellants for a specified period of their offending" (at [20]). This effectively neutralized the Appellants' argument that the charges were "lumped together" or duplicitous.

2. Duplicity and Particularization

The court further analyzed whether the charges were "distinct" under s 132(1) of the Criminal Procedure Code. Referring to Lim Chuan Huat and another v Public Prosecutor [2002] 1 SLR(R) 1 and Public Prosecutor v Fernandez Joseph Ferdinent [2007] 4 SLR(R) 1, the court identified that two offences are distinct if they are not related to each other. In the context of a conspiracy, if there is a single overarching agreement, it constitutes a single offence, regardless of how many substantive crimes are committed in furtherance of it. The court found that the "Scheme" described by the Prosecution was a single, continuous criminal enterprise, and thus the charges were not duplicitous.

3. Appellate Review of Factual Findings

A significant portion of the judgment dealt with the Appellants' challenge to the trial judge’s factual findings, particularly regarding the "control" of the 189 accounts. The Court of Appeal reiterated the high threshold for overturning such findings. Citing Yap Giau Beng Terence v Public Prosecutor [1998] 2 SLR(R) 855 and Sakthivel Punithavathi v Public Prosecutor [2007] 2 SLR(R) 983, the court noted that an appellate court will not disturb a trial judge’s findings unless they are "plainly wrong" or "against the weight of the evidence."

The court observed that the trial judge had the benefit of seeing and hearing the witnesses over 200 days. The judge’s assessment of the "proxies" as credible witnesses, despite their potential motives to lie, was a matter of "primary fact" and "credibility" that the appellate court should be slow to disturb. The court also cited Ng Kwee Leong v Public Prosecutor [1998] 3 SLR(R) 281, noting that "even if a witness is found to have lied on some points, it does not necessarily follow that the rest of his evidence must be rejected" (at [95]).

4. The Evidence of Control

The court found that the trial judge had correctly relied on a "web of evidence" to establish control. This included:

• The testimony of the account holders who admitted to taking instructions from the Appellants.
• The "command center" evidence, where brokers testified to receiving orders directly from Soh or Quah.
• The financial trail showing that the Appellants arranged for the funding of the trades and the settlement of losses.
• The First Appellant’s own admissions in certain communications.

The court rejected the Appellants' "alternative theories" (e.g., that the accounts were controlled by a third party like Ken Tai) as being unsupported by the weight of the evidence.

5. Witness Tampering and Perverting the Course of Justice

Regarding the charges under s 204A of the Penal Code, the court held that the First Appellant’s actions in coaching witnesses to lie to the CAD constituted a clear attempt to pervert the course of justice. The court rejected the argument that these actions were merely "legitimate preparation" for the investigation. The court emphasized that the actus reus of the offence is any act that has a tendency to obstruct the course of justice, and the mens rea is the intent to do so.

6. Companies Act Violations

The court upheld the convictions under s 148(1) of the Companies Act. It found that the First Appellant, as an undischarged bankrupt, had clearly "taken part in the management" of the relevant companies. The court noted that "management" is a broad term that encompasses any activity that involves the direction or control of a company’s affairs, and the evidence showed that Soh was a key decision-maker in the companies’ operations.

What Was the Outcome?

The Court of Appeal dismissed the Appellants' appeals against their convictions in their entirety. The court’s final order was unequivocal:

"we dismiss the Appellants’ appeals against their convictions and will deal separately with the appeals against their sentences." (at [269])

The disposition of the case per party was as follows:

• First Appellant (Soh Chee Wen): All appeals against conviction for the SFA charges, the cheating charges, the witness tampering charges, and the Companies Act charges were dismissed. His conviction on 180 charges was affirmed.
• Second Appellant (Quah Su-Ling): All appeals against conviction for the SFA charges and the cheating charges were dismissed. Her conviction on 169 charges was affirmed.
• Respondent (Public Prosecutor): The convictions obtained at trial were fully upheld.

The court did not deal with the appeals against the sentences in this judgment, reserving those for a separate hearing. However, the underlying sentences imposed by the High Court remained in place pending that hearing: 36 years' imprisonment for Soh Chee Wen and 20 years' imprisonment for Quah Su-Ling. These sentences reflect the unprecedented scale of the market manipulation and the severity with which the Singapore courts view such conduct.

The court also addressed the issue of costs, though in criminal matters of this nature, the standard practice is that each party bears its own costs unless there are exceptional circumstances. No specific order for costs against the Prosecution was made, as the appeals were dismissed.

Why Does This Case Matter?

The judgment in Soh Chee Wen v Public Prosecutor is a landmark in Singapore’s legal landscape for several reasons, impacting both the development of criminal law and the regulation of financial markets.

1. Clarification of Conspiracy Law

The court’s affirmation of criminal conspiracy as a continuing offence is a major doctrinal contribution. It clarifies that a conspiracy is not merely the act of agreeing but the ongoing state of being in agreement. This has profound implications for the Prosecution’s ability to charge complex, long-term criminal enterprises. It prevents defendants from arguing that a long-running scheme must be broken down into hundreds of individual "mini-conspiracies," which would make the prosecution of such cases nearly impossible. This aligns Singapore law with other common law jurisdictions and provides a robust tool for tackling organized and white-collar crime.

2. The "Web of Control" in Securities Fraud

The case provides a blueprint for how the courts will analyze "control" in the context of market manipulation. By accepting a "web of evidence" approach, the court acknowledged that sophisticated manipulators rarely hold accounts in their own names. The judgment demonstrates that the court will look past the nominal account holders to the de facto controllers, using digital communications, financial flows, and witness testimony to reconstruct the reality of the trading activity. This is a significant warning to those who believe they can hide behind proxy accounts.

3. Appellate Deference in Complex Cases

The judgment reinforces the principle of appellate deference to trial judges, particularly in cases involving voluminous evidence and complex factual matrices. The Court of Appeal’s refusal to "retry" the case, despite the Appellants' vigorous challenges to witness credibility, underscores the importance of the trial process. It signals that where a trial judge has conducted a thorough and reasoned analysis of the evidence, the appellate court will not interfere simply because another view of the facts is possible.

4. Integrity of the Financial Markets

The sheer scale of the BAL collapse and the subsequent prosecution send a powerful message about the integrity of Singapore’s financial markets. The 36-year and 20-year sentences (though yet to be finalized on appeal) are among the longest ever imposed for financial crimes in Singapore. This reflects the judiciary’s view that market manipulation is not a victimless crime but a serious threat to the economy and public confidence in the financial system.

5. Guidance on Witness Tampering

The court’s analysis of the perverting the course of justice charges provides clear guidance on the boundaries of "preparing" witnesses. It clarifies that any attempt to influence a witness to provide false information to investigators, even before formal proceedings have commenced, is a serious criminal offence. This is a critical reminder for practitioners and defendants alike about the sanctity of the investigative process.

Practice Pointers

• Drafting Conspiracy Charges: Practitioners should note that the Prosecution may frame a single conspiracy charge to cover a long period of offending, provided there is an overarching agreement. The "continuing offence" doctrine means that such charges are unlikely to be found duplicitous.
• Managing Voluminous Evidence: In cases involving hundreds of trading accounts and thousands of messages, the court will look for patterns and "webs of evidence." Defence counsel must be prepared to challenge the links between the evidence rather than just the individual pieces of data.
• Appellate Strategy: When appealing factual findings, it is insufficient to merely point to inconsistencies in witness testimony. The appellant must show that the trial judge’s conclusion was "plainly wrong" or that there was no evidence to support it—a very high bar.
• Control of Accounts: For compliance officers and financial institutions, this case highlights the importance of "Know Your Customer" (KYC) and monitoring for third-party control. The court’s focus on who actually gave the instructions, rather than whose name is on the account, is a key takeaway.
• Witness Preparation: Legal practitioners must be extremely cautious when discussing investigations with potential witnesses. Any suggestion that a witness should "align" their story with others or withhold information can lead to charges of perverting the course of justice.
• Companies Act Compliance: Undischarged bankrupts must be strictly advised against any involvement in the "management" of a company. The court’s interpretation of management is broad and includes informal or de facto direction of company affairs.
• Expert Evidence in SFA Cases: The use of market experts to explain trading patterns (wash trades, matched orders) is crucial. Practitioners should ensure that expert testimony is grounded in the specific data of the 189 accounts to be persuasive.

Subsequent Treatment

As this is a very recent judgment from the Court of Appeal (October 2025), its subsequent treatment in later cases is yet to be fully recorded. However, it is expected to be the definitive authority on the "continuing offence" nature of criminal conspiracy under s 120B of the Penal Code and will likely be cited in all future large-scale market manipulation and white-collar conspiracy cases. The judgment's emphasis on the "web of evidence" approach to proving de facto control is also expected to influence the prosecution of proxy-trading cases under the SFA.

Legislation Referenced

• Securities and Futures Act (Cap 289, 2006 Rev Ed), s 197(1)(b)
• Penal Code (Cap 224), s 120A, s 120B, s 204A, s 420, s 511
• Companies Act (Cap 50, 2006 Rev Ed), s 148(1)
• Criminal Procedure Code 2010, s 132, s 132(1)
• Interpretation Act (Cap 1, 2002 Rev Ed), s 2
• Prisons Act 1933
• Misuse of Drugs Act (Cap 185, 2008 Rev Ed), s 5(1)

Cases Cited

• Applied: Public Prosecutor v Khoo Ban Hock & ors [1988] 2 MLJ 217
• Referred to: Public Prosecutor v Soh Chee Wen and another [2023] SGHC 299
• Referred to: Public Prosecutor v Yeo Choon Poh [1993] 3 SLR(R) 302
• Referred to: Er Joo Nguang and another v Public Prosecutor [2000] 1 SLR(R) 756
• Referred to: Chai Chien Wei Kelvin v Public Prosecutor [1998] 3 SLR(R) 619
• Referred to: Lau Cheng Kai and others v Public Prosecutor [2019] 3 SLR 374
• Referred to: Tay Huay Hong v Public Prosecutor [1998] 3 SLR(R) 290
• Referred to: Viswanathan Ramachandran v Public Prosecutor [2003] 3 SLR(R) 435
• Referred to: BOI v BOJ [2018] 2 SLR 1156
• Referred to: Yap Giau Beng Terence v Public Prosecutor [1998] 2 SLR(R) 855
• Referred to: Sakthivel Punithavathi v Public Prosecutor [2007] 2 SLR(R) 983
• Referred to: Alhadad v Public Prosecutor [1998] 3 SLR(R) 352
• Referred to: Ng Kwee Leong v Public Prosecutor [1998] 3 SLR(R) 281
• Referred to: Muhammad bin Kadar and another v Public Prosecutor [2011] 3 SLR 1205
• Referred to: Lim Chuan Huat and another v Public Prosecutor [2002] 1 SLR(R) 1
• Referred to: Public Prosecutor v Wong Siu Fai [2002] 1 SLR(R) 1161
• Referred to: Tham Wing Fai Peter v Public Prosecutor [1988] 1 SLR(R) 349
• Referred to: Xia Qin Lai v Public Prosecutor [1999] 3 SLR(R) 257
• Referred to: Public Prosecutor v Fernandez Joseph Ferdinent [2007] 4 SLR(R) 1
• Referred to: Skandinaviska Enskilda Banken AB (Publ), Singapore Branch v Asia Pacific Breweries (Singapore) Pte Ltd [2009] 4 SLR(R) 788
• Referred to: Ho Kang Peng v Scintronix Corp Ltd [2014] 3 SLR 329
• Referred to: Benmax v Austin Motor Co Ltd [1955] AC 370
• Referred to: Lim Beh & Ors v Opium Farmer (1842) 3 Kys 10
• Referred to: State of New South Wales v Earthline Constructions Pty Ltd (1999) 160 ALR 588

Source Documents

• Original judgment PDF: Download (PDF, hosted on Legal Wires CDN)
• Official eLitigation record: View on elitigation.sg