BHVN · Biohaven Ltd.

The shares subject to this stock option will vest in full on the earlier of (a) April 28, 2027 or (b) the date of the 2027 Annual Meeting of Shareholders, in each case subject to the Reporting Person's continuous service with the Issuer through such vesting date.

The shares subject to this stock option will vest in full on the earlier of (a) April 28, 2027 or (b) the date of the 2027 Annual Meeting of Shareholders, in each case subject to the Reporting Person's continuous service with the Issuer through such vesting date.

The shares subject to this stock option will vest in full on the earlier of (a) April 28, 2027 or (b) the date of the 2027 Annual Meeting of Shareholders, in each case subject to the Reporting Person's continuous service with the Issuer through such vesting date.

The shares subject to this stock option will vest in full on the earlier of (a) April 28, 2027 or (b) the date of the 2027 Annual Meeting of Shareholders, in each case subject to the Reporting Person's continuous service with the Issuer through such vesting date.

The shares subject to this stock option will vest in full on the earlier of (a) April 28, 2027 or (b) the date of the 2027 Annual Meeting of Shareholders, in each case subject to the Reporting Person's continuous service with the Issuer through such vesting date.

The shares subject to this stock option will vest in full on the earlier of (a) April 28, 2027 or (b) the date of the 2027 Annual Meeting of Shareholders, in each case subject to the Reporting Person's continuous service with the Issuer through such vesting date.

The shares subject to this stock option will vest in full on the earlier of (a) April 28, 2027 or (b) the date of the 2027 Annual Meeting of Shareholders, in each case subject to the Reporting Person's continuous service with the Issuer through such vesting date.

These Common Shares are held in a trust for the benefit of the Reporting Person's family members, excluding the Reporting Person. The Reporting Person's spouse and the spouse's sibling are co-trustees of the trust. The Reporting Person disclaims beneficial ownership of these securities, and the inclusion of the securities held by the trust in this report and prior Section 16 filings by the Reporting Person is not an admission that the reporting person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.

The shares underlying this option vest in four equal installments on February 27, 2026, 2027, 2028 and 2029, subject to the Reporting Person's continuous service with the Issuer at each vesting date.

The shares underlying this option vest in four equal installments on February 27, 2026, 2027, 2028 and 2029, subject to the Reporting Person's continuous service with the Issuer at each vesting date.

The shares underlying this option vest in four equal installments on February 27, 2026, 2027, 2028 and 2029, subject to the Reporting Person's continuous service with the Issuer at each vesting date.

The shares underlying this option vest in four equal installments on February 27, 2026, 2027, 2028 and 2029, subject to the Reporting Person's continuous service with the Issuer at each vesting date.

The shares underlying this option vest in four equal installments on February 27, 2026, 2027, 2028 and 2029, subject to the Reporting Person's continuous service with the Issuer at each vesting date.

No shares were sold - these shares were withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted share units.

Each restricted share unit represents the contingent right to receive one common share of the Issuer.

The reporting person was granted 19,000 restricted share units on January 5, 2025, vesting in four equal installments on January 5, 2025, 2026, 2027 and 2028, subject to the reporting person's continued service with the Issuer at each vesting date.

Not applicable.

This balance includes 544 shares that were acquired through the Biohaven Employee Share Purchase Plan on May 31, 2025.

Each restricted share unit represents the contingent right to receive one common share of the Issuer.

The reporting person was granted 57,000 restricted share units on January 5, 2025, vesting in four equal installments on January 5, 2025, 2026, 2027 and 2028, subject to the reporting person's continued service with the Issuer at each vesting date.

Not applicable.

Each restricted share unit represents the contingent right to receive one common share of the Issuer.

The reporting person was granted 17,000 restricted share units on January 5, 2025, vesting in four equal installments on January 5, 2025, 2026, 2027 and 2028, subject to the reporting person's continued service with the Issuer at each vesting date.

Not applicable.

No shares were sold - these shares were withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted share units.

No shares were sold - these shares were withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted share units.

Each restricted share unit represents the contingent right to receive one common share of the Issuer.

The reporting person was granted 10,000 restricted share units on January 5, 2025, vesting in four equal installments on January 5, 2025, 2026, 2027 and 2028, subject to the reporting person's continued service with the Issuer at each vesting date.

Not applicable.

This balance includes 544 shares that were acquired through the Biohaven Employee Share Purchase Plan on May 31, 2025.

No shares were sold - these shares were withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted share units.

This balance includes 544 shares that were acquired through the Biohaven Employee Share Purchase Plan on May 31, 2025.

Each restricted share unit represents the contingent right to receive one common share of the Issuer.

The reporting person was granted 15,000 restricted share units on January 5, 2025, vesting in four equal installments on January 5, 2025, 2026, 2027 and 2028, subject to the reporting person's continued service with the Issuer at each vesting date.

Not applicable.

No shares were sold - these shares were withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted share units.

This balance includes 544 shares that were acquired through the Biohaven Employee Share Purchase Plan on May 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $8.4950 - $8.5200, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote to this Form 4.

Represents common shares acquired in an underwritten public offering.

These Common Shares are held in a trust for the benefit of the Reporting Person's family members, excluding the Reporting Person. The Reporting Person's spouse is trustee of the trust. The Reporting Person disclaims beneficial ownership of these securities, and the inclusion of the securities held by the trust in this report and prior Section 16 filings by the Reporting Person is not an admission that the reporting person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.

Represents common shares acquired in an underwritten public offering.

Represents common shares acquired in an underwritten public offering.

Represents common shares acquired in an underwritten public offering.

These Common Shares are held in a trust for the benefit of the Reporting Person's family members, excluding the Reporting Person. The Reporting Person's spouse is trustee of the trust. The Reporting Person disclaims beneficial ownership of these securities, and the inclusion of the securities held by the trust in this report and prior Section 16 filings by the Reporting Person is not an admission that the reporting person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.

The shares subject to this stock option will vest in full on the earlier of (a) May 5, 2026 or (b) the date of the 2026 Annual Meeting of Shareholders, in each case subject to the Reporting Person's continuous service with the Issuer through such vesting date.

The shares subject to this stock option will vest in full on the earlier of (a) May 5, 2026 or (b) the date of the 2026 Annual Meeting of Shareholders, in each case subject to the Reporting Person's continuous service with the Issuer through such vesting date.

The shares subject to this stock option will vest in full on the earlier of (a) May 5, 2026 or (b) the date of the 2026 Annual Meeting of Shareholders, in each case subject to the Reporting Person's continuous service with the Issuer through such vesting date.

The shares subject to this stock option will vest in full on the earlier of (a) May 5, 2026 or (b) the date of the 2026 Annual Meeting of Shareholders, in each case subject to the Reporting Person's continuous service with the Issuer through such vesting date.

The shares subject to this stock option will vest in full on the earlier of (a) May 5, 2026 or (b) the date of the 2026 Annual Meeting of Shareholders, in each case subject to the Reporting Person's continuous service with the Issuer through such vesting date.

The shares subject to this stock option will vest in full on the earlier of (a) May 5, 2026 or (b) the date of the 2026 Annual Meeting of Shareholders, in each case subject to the Reporting Person's continuous service with the Issuer through such vesting date.

The shares subject to this stock option will vest in full on the earlier of (a) May 5, 2026 or (b) the date of the 2026 Annual Meeting of Shareholders, in each case subject to the Reporting Person's continuous service with the Issuer through such vesting date.

This amendment is being filed to correct the nature of the indirect ownership reported in the Form 4 filed on March 5, 2025 (the "Original Form 4"). The Original Form 4 inadvertently misstated that 3,400 Common Shares were indirectly acquired by the Reporting Person through the 2013 Charitable Remainder Trust, and 25,000 Common Shares were indirectly acquired by the Reporting Person through the John W Childs 2013 Revocable Trust. However, as reflected in this amendment, 28,400 Common Shares were indirectly acquired by the Reporting Person through the John W Childs 2013 Revocable Trust, and no Common Shares were indirectly acquired by the Reporting Person through the 2013 Charitable Remainder Trust.

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $30.17 - $30.89, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote to this Form 4.

Each restricted share unit represents the contingent right to receive one common share of the Issuer.

The reporting person was granted 57,000 restricted share units on January 5, 2025, vesting in four equal installments on January 5, 2025, 2026, 2027 and 2028, subject to the reporting person's continued service with the Issuer at each vesting date.

Not applicable.

This balance includes 305 shares that were acquired through the Biohaven Employee Share Purchase Plan (the "ESPP") on May 31, 2023, 1,336 shares acquired through the ESPP on November 30, 2023, and 742 shares acquired through the ESPP on May 31, 2024.

The shares underlying this option vest in four equal installments on January 5, 2025, 2026, 2027 and 2028, subject to the Reporting Person's continuous service with the Issuer at each vesting date.

The shares underlying this option vest in four equal installments on January 5, 2025, 2026, 2027 and 2028, subject to the Reporting Person's continuous service with the Issuer at each vesting date.

No shares were sold - these shares were withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted share units.

Each restricted share unit represents the contingent right to receive one common share of the Issuer.

The reporting person was granted 19,000 restricted share units on January 5, 2025, vesting in four equal installments on January 5, 2025, 2026, 2027 and 2028, subject to the reporting person's continued service with the Issuer at each vesting date.

Not applicable.