Traphagen Investment Advisors 13F: New $313K Stake in SNDK

Traphagen Investment Advisors established a fresh stake in Sandisk Corporation (NasdaqGS: SNDK) during the period, according to a Form 13F regulatory filing published on October 14, 2026. Because 13F reports look backward, these filings reflect holdings as of the end of the reporting period and may not represent the investor's current positioning today.

What Changed in Traphagen Investment Advisors's Sandisk Corporation Position

The fund opened a brand-new position in Sandisk Corporation during the quarter, acquiring 180 shares. The reported value of this initial holding came to $313,181.00.

Other Institutional Activity in Sandisk Corporation

Other large institutional investors adjusted their holdings around the same reporting window. Blackrock Inc. reduced its holdings by 108,196 shares, ending with 10,295,300 shares worth about $13,376,683,792.00. Vanguard Capital Management LLC grew its holdings by 141,942 shares, ending with 9,668,255 shares worth about $12,561,964,193.00. FMR, LLC cut back its stake by 5,529,010 shares, leaving it with 7,861,665 shares valued at about $10,214,661,718.00. State Street Corporation added 353,395 shares to finish with 5,927,453 shares worth about $7,701,539,972.00. Invesco Ltd. grew its holdings by 4,445,117 shares, ending with 5,610,346 shares valued at about $7,289,522,831.00.

Sandisk Corporation Stock Down 6.3%

Sandisk shares recently traded around $1,315.60 as of October 16, 2026. The stock sits about 17.3% below its 50-day moving average of $1,591.35 and about 9.7% above its 200-day moving average of $1,199.66. The shares trade 44.1% below their 52-week high of $2,354.39 and far above their 52-week low of $136.29.

Recent Earnings

Sandisk reported trailing twelve-month revenue of $20,248,000,512.00 alongside trailing earnings of $73.76 per share. The company posted a net profit margin of 56.5% and a return on equity of 91.6%. Year-over-year revenue growth reached 371.6%. The company's next quarterly earnings report is scheduled for October 29, 2026.

Insider Buying and Selling at Sandisk Corporation

Company insiders executed several transactions ahead of the filing. On September 8, 2026, officer Bernard Shek sold 2,308 shares at an average price of $1,767.33 for a total value of $4,078,998.00. Chief Executive Officer David V. Goeckeler sold 33,838 shares for a total value of $51,700,130.00 on September 14, 2026. Chief Financial Officer Lomelin Luis Felipe Visoso sold 1,000 shares at an average price of $1,568.83 for a total value of $1,568,830.00 on September 15, 2026. Later, on September 17, 2026, CEO David V. Goeckeler sold another 33,841 shares for a total value of $53,272,704.00.

Analysts Set New Price Targets

Wall Street firms updated their views on the stock ahead of the filing. On August 14, 2026, RBC Capital maintained its Sector Perform rating and raised its price target to $1,600.00 from $1,300.00. On August 14, 2026, Wells Fargo maintained its Equal-Weight rating and raised its target to $1,550.00 from $1,400.00. On August 25, 2026, Mizuho maintained its Outperform rating while lowering its target slightly to $1,875.00 from $1,900.00. On September 22, 2026, Rosenblatt initiated coverage with a Buy rating and a $2,400.00 price target. Later, on October 6, 2026, Mizuho maintained its Outperform rating and raised its target to $2,050.00 from $1,875.00. Overall, the stock carries a consensus buy rating from analysts with a mean price target of $2,173.00 across 24 analyst opinions.

About Sandisk Corporation

Sandisk Corporation develops, manufactures, and sells data storage devices and solutions using NAND flash technology in the Americas, Europe, the Middle East, Africa, Asia, and internationally. Headquartered in Milpitas, California, the company employs 11,100 people and serves major memory and storage markets.

Bottom Line

Investors tracking Traphagen's move should keep an eye on upcoming catalysts, including Sandisk's next earnings report on October 29, 2026. Because 13F filings are historical records, future filings will show whether the fund builds on this initial stake. Keep in mind that 13F filings are backward-looking: they show holdings as of the end of the reporting quarter and may not represent the fund's current position.