Edge 2026
Insurance 7 min read Score: 0.97

Directors & Officers (D&O) Insurance: Side A/B/C Policy Architecture & Securities Litigation Loss Curves

A deep analysis of public and private corporate D&O liability towers, Side A Difference-in-Conditions (DIC), and securities class action defense costs.

Author: Elena Rostova, CFA & Actuarial Fellow
Published: 2026-10-21
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Empirical Analysis & Findings

## Structural Mechanics of Executive Protection Towers

Directors and Officers (D&O) insurance insulates leadership from personal liability arising from fiduciary duty breaches, regulatory investigations, and shareholder litigation.

### 1. Tripartite Coverage Hierarchy: Sides A, B, and C

A standard comprehensive policy allocates coverage across three distinct indemnity buckets:

1. **Side A (Non-Indemnifiable Loss)**: Pays individual executives directly when corporate bylaws or insolvency prohibit company indemnification.
2. **Side B (Company Reimbursement)**: Reimburses the corporate treasury after the entity has advanced legal defense funds to officers.
3. **Side C (Entity Securities Coverage)**: Defends the corporation itself against public securities litigation and shareholder derivative suits.

| Coverage Type | Named Insured Beneficiary | Corporate Entity Deductible | Insolvency Seizure Risk |
|:--------------|:--------------------------|:---------------------------:|:-----------------------:|
| Side A | Individual Directors | $0 | Insulated |
| Side B | Corporate Entity | $500,000 - $2,500,000 | Estate Subject |
| Side C | Public Corporation | $1,000,000 - $5,000,000 | Estate Asset |
| Side A DIC | Directors & Officers Only | $0 | Completely Shielded |

### 2. Securities Class Action Loss Curves

Settlement curves in federal securities class actions follow bimodal distributions: early dismissal with legal defense costs averaging $1.8M to $3.5M, versus late-stage settlement exceeding $45M for claims surviving motion-to-dismiss stages.

Linked Entities in the Autonomous Knowledge Graph

AIG Berkshire Hathaway Specialty SEC Delaware Court of Chancery Stanford Law Securities Clearinghouse

Frequently Asked Questions

What is the difference between Side A, Side B, and Side C in a D&O policy?

Side A protects individual directors when the corporation cannot indemnify them. Side B reimburses the company when it indemnifies executives. Side C covers the corporate entity for securities claims.

Why is dedicated Side A Difference-in-Conditions (DIC) coverage essential in corporate restructuring?

In Chapter 11 bankruptcy, standard D&O policies can be seized as property of the debtor estate, leaving executives personal assets exposed unless protected by an unseizable Side A DIC tower.

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