The S&P 500 is back at record highs after the Iran war selloff, but the rally under the surface is not evenly distributed.
Six names have already doubled in 2026, and they all sit in the same trade: the physical layer of artificial intelligence.
Storage. Optical networking. Chip testing. These are the bottlenecks that the market has spent the last four months repricing as permanent, not cyclical.
S&P 500 Leaderboard: Top-Performing Stocks In 2026 (YTD)
Through April 22, the six best-performing S&P 500 stocks year-to-date are:
| Company | YTD % | Next Earnings |
|---|---|---|
| Sandisk Corp. (NASDAQ:SNDK) | +307.00% | Thu Apr 30 (After-Mkt) |
| Western Digital Corp. (NASDAQ:WDC) | +135.63% | Thu Apr 30 (After-Mkt) |
| Lumentum Holdings Inc. (NASDAQ:LITE) | +129.38% | Tue May 5 (After-Mkt) |
| Ciena Corp. (NYSE:CIEN) | +122.36% | Thu Jun 4 (Pre-Mkt) |
| Seagate Technology Holdings plc (NASDAQ:STX) | +116.36% | Tue Apr 28 (After-Mkt) |
| Teradyne Inc. (NASDAQ:TER) | +106.99% | Tue Apr 28 (After-Mkt) |
Sandisk: The NAND Supercycle Has A Name
Sandisk is the clearest AI-memory pure-play on the market, and the numbers have done the talking.
Cloud and datacenter sales grew 123% from fiscal Q3 2025 to fiscal Q2 2026, according to company disclosures, and management guided fiscal Q3 revenue to $4.4 billion to $4.8 billion with gross margins above 65%.
NAND contract prices are expected to rise 70% to 75% quarter-over-quarter. Sandisk itself raised NAND flash prices by more than 10% starting April 1.
According to Benzinga’s Analyst Stock Ratings, the consensus Street price target now sits at $646.00, which is 31.5% below the current $943.35 share price.
Wells Fargo & Co. was the last to update its rating on Sandisk, raising its price target from $675 to $975 on April 20 while maintaining Equal-Weight. Earlier in April, Evercore ISI Group initiated coverage at $1,200 with an Outperform rating — the Street high.
Fiscal Q3 earnings drop April 30 after the close.
Western Digital: Sold Out Through 2026
Western Digital’s story is structural. The company has reportedly sold out its entire 2026 hard-disk-drive production capacity, and long-term purchase agreements with hyperscalers extend into 2027 and 2028.
Cloud now accounts for roughly 89% of revenue.
Benzinga’s Analyst Stock Ratings shows that the consensus Street price target now sits at $253.29, which is 36.5% below the current $399.08 share price.
Barclays was the last to update its rating on Western Digital, raising its price target from $325 to $405 on April 22 while maintaining Overweight. The Street-high is $420, set by Cantor Fitzgerald on Feb. 4.
Fiscal Q3 results are due April 30 after the close.
Lumentum: The Light Engine Of AI
Lumentum makes the optical transceivers and laser chips that move data between GPUs inside AI data centers. Without them, AI training clusters do not function at scale.
The company joined the S&P 500 earlier in April and recently received a $2 billion strategic investment from Nvidia Corp. (NASDAQ:NVDA) paired with a multi-billion-dollar purchase commitment.
The Street’s average price target on Lumentum Holdings stands at $607.07, per Benzinga’s Analyst Stock Ratings — about 27.2% below the current $833.81 share price.
Earlier this week, Morgan Stanley revised its call, moving its price target from $595 to $710 on April 20 while keeping an Equal-Weight rating. The Street-high of $950 belongs to JPMorgan Chase & Co., set on April 9.
Ciena: The Nervous System Of AI Data Centers
Ciena makes the optical transport gear that connects data centers to each other across metros, oceans and continents. As AI training clusters outgrow single buildings, the data-center-interconnect market has become one of the most visible bottlenecks in the AI buildout.
Analyst consensus on Ciena currently points to a $324.50 price target — 35.7% below the $504.93 current share price, per Benzinga’s Analyst Stock Ratings.
Morgan Stanley issued the latest call, lifting its price target from $286 to $405 on April 20 while holding Equal-Weight. The Street-high of $550 is shared by JPMorgan and Bank of America Securities, both set on April 16 — Bank of America had upgraded the stock from Neutral to Buy in early March.
The next earnings report is on June 4.
Seagate: The HDD-AI Supercycle
Seagate sells spinning hard drives — a technology the market had written off for a decade. Then AI arrived, and hyperscalers discovered they needed massive amounts of cold and warm storage at a fraction of the cost-per-terabyte of NAND flash.
Per Benzinga’s Analyst Stock Ratings, the aggregated Street price target on Seagate Technology Holdings is $429.55 — 25.3% below the current $575.30 share price, the tightest gap among the six names.
Barclays was the most recent to update coverage, and this one was a genuine rating change: an upgrade from Equal-Weight to Overweight on April 22, paired with a price target hike from $425 to $625. The Street-high of $650 belongs to Cantor Fitzgerald, set February 4.
Earnings drop April 28 after the close.
Teradyne: The Pickaxe For AI Silicon
Teradyne makes the automated test equipment that validates AI chips before they ship. CEO Greg Smith said on the fiscal Q4 earnings call that AI applications accounted for more than 60% of revenue in Q4 and were expected to drive upwards of 70% in Q1 2026.
The consensus Street price target on Teradyne stands at $253.61, according to Benzinga’s Analyst Stock Ratings — 35.3% below the current $392.00 share price.
UBS Group AG posted the latest call, pushing its price target from $325 to $440 on April 21 while keeping a Buy rating. That $440 figure is now the Street-high.
Fiscal Q1 earnings are due April 28.
Photo by Andrey_Popov via Shutterstock
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