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Video: What is a Stock Split?
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| AnaptysBio, Inc. is a clinical-stage biotechnology company focused on delivering immunology therapeutics. Co. is developing immune cell modulators, including two checkpoint agonists for autoimmune and inflammatory disease: rosnilimab, its PD-1 agonist, in a Phase 2b trial for the treatment of rheumatoid arthritis and in a Phase 2 trial for the treatment of ulcerative colitis; and ANB032, its BTLA agonist, in a Phase 2b trial for the treatment of atopic dermatitis. Co.'s preclinical immune cell modulator portfolio includes ANB033, an anti-CD122 antagonist antibody, and ANB101, a BDCA2 modulator antibody, for the treatment of autoimmune and inflammatory diseases. According to our ANAB split history records, AnaptysBio has had 1 split. | |
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AnaptysBio (ANAB) has 1 split in our ANAB split history database. The split for ANAB took place on April 20, 2026. This was a 15 for 10 split, meaning for each 10 shares of ANAB owned pre-split, the shareholder now owned 15 shares. For example, a 1000 share position pre-split, became a 1500 share position following the split.
When a company such as AnaptysBio splits its shares, the market capitalization before and after the split takes place remains stable, meaning the shareholder now owns more shares but each are valued at a lower price per share. Often, however, a lower priced stock on a per-share basis can attract a wider range of buyers. If that increased demand causes the share price to appreciate, then the total market capitalization rises post-split. This does not always happen, however, often depending on the underlying fundamentals of the business.
Looking at the ANAB split history from start to finish, an original position size of 1000 shares would have turned into 1500 today. Below, we examine the compound annual growth rate — CAGR for short — of an investment into AnaptysBio shares, starting with a $10,000 purchase of ANAB, presented on a split-history-adjusted basis factoring in the complete ANAB split history.

Growth of $10,000.00
Without Dividends Reinvested
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| Start date: |
01/27/2017 |
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| End date: |
06/12/2026 |
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| Start price/share: |
$11.69 |
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| End price/share: |
$56.07 |
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| Dividends collected/share: |
$0.00 |
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| Total return: |
379.64% |
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| Average Annual Total Return: |
18.20% |
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| Starting investment: |
$10,000.00 |
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| Ending investment: |
$47,952.77 |
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| Years: |
9.38 |
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| Date |
Ratio |
| 04/20/2026 | 15 for 10 |
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