Astera Labs (ALAB) had the highest return on May 19 by a large-cap US stock, returning 14.7%.

ASSET	DATE	% RETURN
Astera Labs (ALAB)	5/19/2026	14.7%
Credo Technology (CRDO)	5/19/2026	11.67%
Sandisk (SNDK)	5/19/2026	7.25%
Marvell Technology (MRVL)	5/19/2026	7.08%
Arm Holdings plc American Depositary Shares (ARM)	5/19/2026	6.39%
Corcept Therapeutics (CORT)	5/19/2026	5.78%
Ciena (CIEN)	5/19/2026	5.42%
Tempus AI, Inc Class A Common Stock (TEM)	5/19/2026	5.42%
Semtech (SMTC)	5/19/2026	5.03%
Micron Technology (MU)	5/19/2026	4.98%
DigitalOcean (DOCN)	5/19/2026	4.89%
Tower Semiconductor (TSEM)	5/19/2026	4.31%
MACOM Technology Solutions (MTSI)	5/19/2026	4.16%
Cerebras Systems Inc Class A Common Stock (CBRS)	5/19/2026	3.92%
Medline Inc Class A Common Stock (MDLN)	5/19/2026	3.8%
Alcoa (AA)	5/19/2026	3.8%
Hasbro (HAS)	5/19/2026	3.69%
Target (TGT)	5/19/2026	3.63%
Home Depot (HD)	5/19/2026	3.62%
Edison International (EIX)	5/19/2026	3.58%
Intel (INTC)	5/19/2026	3.57%
Baxter International (BAX)	5/19/2026	3.56%
Nebius (NBIS)	5/19/2026	3.52%
POSCO (PKX)	5/19/2026	3.5%
Becton Dickinson and (BDX)	5/19/2026	3.49%

Large-cap stocks are treated as having a market cap of $10B+.