Alpine Immune Sciences, Inc. (ALPN) Surges 6.2%: Is This an Indication of Further Gains? Posted byZacks Equity Research September 28, 2021 Leave a comment on Alpine Immune Sciences, Inc. (ALPN) Surges 6.2%: Is This an Indication of Further Gains? Alpine Immune Sciences, Inc. (ALPN) was a big mover last session on higher-than-average trading volume. The latest trend in earnings estimate revision…