In many jurisdictions, it is a requirement to report certain information regarding STRs to senior management and/or the board of directors. This information may be limited to the number of reports filed, the dollar amounts involved and significant trends as observed by compliance personnel. In some cases, if the activity presents a significant or potentially ongoing risk to the institution, the leaders of the institution should be made aware so that high-level decisions can be made regarding potential changes to systems, staffing, products, services or particular relationships maintained by the institution.
Banks are required by the SAR regulations of their federal banking agency to notify the board of directors or an appropriate board committee that SARs have been filed. However, the regulations do not mandate a particular notification format and banks should have flexibility in structuring their format. Therefore, banks may, but are not required to, provide actual copies of SARs to the board of directors or a board committee. Alternatively, banks may opt to provide summaries, tables of SARs filed for specific violation types, or other forms of notification. Regardless of the notification format used by the bank, management should provide sufficient information on its SAR filings to the board of directors or an appropriate committee in order to fulfill its fiduciary duties, while being mindful of the confidential nature of the SAR. https://bsaaml.ffiec.gov/manual/AssessingComplianceWithBSARegulatoryRequirements/0

Microstructuring is a method of money laundering that involves breaking down large transactions into smaller amounts that are below the reporting threshold or the level of scrutiny of financial institutions. One of the red flags of microstructuring is frequent visits to make cash deposits of nominal amounts, as this may indicate an attempt to avoid detection and conceal the source or destination of illicit funds. Other red flags of microstructuring include checking accounts receiving cash deposits in amounts under $1,000 as infrequently as several times a month, followed by ATM withdrawals in foreign countries, or deposits that are inconsistent with the customer's profile or business activity.
Reference:
FinCEN Advisory - FIN-2010-A001, page 4
Red Flags of Money Laundering | PPT, slide 9
Red Flags of Microstructuring | CAMS Exam Preparation | ACAMS

the results of related audits and examinations are the most useful additional element to report to executive management on a regular basis. Audits and examinations are essential tools to assess the effectiveness and compliance of the anti-money laundering program across the organization. They can identify strengths, weaknesses, gaps, risks, and best practices in the program and provide recommendations for improvement. They can also help to monitor the implementation of corrective actions and remediation plans. Reporting the results of audits and examinations can help executive management to oversee the performance of the program, ensure accountability, and demonstrate commitment to the anti-money laundering objectives12 Reference:
1: ACAMS Study Guide for the CAMS Certification Examination, 6th Edition, Chapter 2, page 62
2: CERTIFICATION Candidate Handbook, page 16

account opening documents and account statements are examples of supporting documentation that can help the law enforcement agency to verify the identity, profile, and activity of the customer involved in the suspicious transaction. These documents can provide useful information such as the customer's name, address, date of birth, identification number, occupation, source of funds, transaction history, and beneficiaries. These documents can also help to establish the baseline of normal and expected activity for the customer, and to identify any deviations or anomalies that may indicate money laundering, fraud, or other criminal activities.
Reference:
Suspicious Activity Report Supporting Documentation, section "What Constitutes Supporting Documentation", paragraph 2: "Supporting documentation may include, for example, transaction records, new account information, tape recordings, e-mail messages, and correspondence." Documentation Requirements: Suspicious Activity Report Supporting Documentation, section "SARs Documentation Requirements", paragraph 2: "Keep all documents with evidence of the background, the purpose of the transactions, the trigger, the investigation carried out, and all findings and conclusions." BSA/AML Manual, section "Assessing the BSA/AML Compliance Program - BSA Compliance Officer", paragraph 3: "The BSA compliance officer is responsible for ensuring that the bank's BSA/AML compliance program is implemented effectively, including timely updates in response to changes in regulations or business activities, and for managing all aspects of the BSA/AML compliance program. The BSA compliance officer is also responsible for ensuring that the bank's BSA/AML compliance program is communicated to all personnel and that adequate training is provided to appropriate personnel."

The individual responsible for setting the anti-money laundering software parameters should recommend ensuring that the alert parameters are based on risk, rather than on default software rules. This means that the software should be configured to generate alerts only when transactions or customers exhibit a high level of risk, based on factors such as the source and destination of funds, the amount and frequency of transactions, the type and purpose of the account, the customer profile and behavior, and the presence of any red flags or indicators of money laundering or terrorist financing. By aligning the alert parameters with the risk assessment of the financial institution, the software can reduce the number of false positives and focus on the most relevant and suspicious cases, thus improving the efficiency and effectiveness of the anti-money laundering staff.
Reference:
Setting AML Transaction Monitoring Thresholds 1, ComplyAdvantage, 2020.
Machine learning techniques for anti-money laundering (AML) analysis: a survey 2, Springer, 2018.
Anti Money Laundering (AML) Definition: Its History and How It Works 3, Investopedia, 2021.