Explanation of Responses:
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(1)
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These options become exercisable in annual 25% increments, commencing on the date shown in Table II, Column 6.
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(2)
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Grant to reporting person of option to buy the number of shares of Common Stock set forth in Table II, Column 7, under the ABIOMED, Inc. 2008 Stock Incentive Plan.
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(3)
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These options become exercisable in annual 33-1/3% increments, commencing on the date shown in Table II, Column 6.
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(4)
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Grant to reporting person of option to buy the number of shares of Common Stock set forth in Table II, Column 7, under the ABIOMED, Inc. 2015 Omnibus Incentive Plan.
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(5)
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Exercise of stock options pursuant to reporting owner's 10b5-1 plan.
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(6)
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Sale of common stock pursuant to reporting owner's 10b5-1 plan.
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(7)
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This price represents the weighted average sale price of multiple transactions on the reported date at prices that ranged between $434.0900 and $435.0000. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer, or a security holder of the Issuer.
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(8)
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This price represents the weighted average sale price of multiple transactions on the reported date at prices that ranged between $435.1400 and $436.0400. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer, or a security holder of the Issuer.
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(9)
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This price represents the weighted average sale price of multiple transactions on the reported date at prices that ranged between $436.1800 and $437.1700. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer, or a security holder of the Issuer.
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(10)
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This price represents the weighted average sale price of multiple transactions on the reported date at prices that ranged between $437.1900 and $438.1600. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer, or a security holder of the Issuer.
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(11)
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This price represents the weighted average sale price of multiple transactions on the reported date at prices that ranged between $438.1700 and $439.1400. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer, or a security holder of the Issuer.
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(12)
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This price represents the weighted average sale price of multiple transactions on the reported date at prices that ranged between $439.1700 and $440.1600. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer, or a security holder of the Issuer.
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(13)
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This price represents the weighted average sale price of multiple transactions on the reported date at prices that ranged between $440.1700 and $441.0800. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer, or a security holder of the Issuer.
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(14)
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This price represents the weighted average sale price of multiple transactions on the reported date at prices that ranged between $441.1800 and $442.1500. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer, or a security holder of the Issuer.
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(15)
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This price represents the weighted average sale price of multiple transactions on the reported date at prices that ranged between $442.3700 and $442.9000. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer, or a security holder of the Issuer.
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(16)
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This price represents the weighted average sale price of multiple transactions on the reported date at prices that ranged between $443.4300 and $444.0700. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer, or a security holder of the Issuer.
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(17)
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This price represents the weighted average sale price of multiple transactions on the reported date at prices that ranged between $444.5400 and $445.5100. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer, or a security holder of the Issuer.
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(18)
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This price represents the weighted average sale price of multiple transactions on the reported date at prices that ranged between $445.6700 and $446.5000. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer, or a security holder of the Issuer.
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(19)
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This price represents the weighted average sale price of multiple transactions on the reported date at prices that ranged between $446.8300 and $447.2800. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer, or a security holder of the Issuer.
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