---
title: "Storage Chip Stocks Edge Mixed in After-Hours, WDC Up 0.25%, MRAM Down 0.77%"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/299101593.md"
description: "Storage chip stocks traded mixed in after-hours. Western Digital(WDC.US) rose 0.25% to $413.00, Micron(MU.US) fell 0.18% to $925.89, SanDisk(SNDK.US) slipped 0.05% to $1530.20. Most constituents moved less than 1% as volume tapered."
datetime: "2026-09-15T22:47:34.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/299101593.md)
  - [en](https://longbridge.com/en/news/299101593.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/299101593.md)
generator: "portal-rs"
---

# Storage Chip Stocks Edge Mixed in After-Hours, WDC Up 0.25%, MRAM Down 0.77%

Storage chip stocks showed muted movement in after-hours trading on September 15, with most constituents moving less than 1%. Western Digital(WDC.US) **climbed 0.25%** to $413.00 in after-hours, leading gainers among mainstream names; Seagate(STX.US) **edged down 0.01%** to $771.70, essentially flat; Micron Technology(MU.US) **slipped 0.18%** to $925.89, while SanDisk(SNDK.US) **declined 0.05%** to $1530.20. MRAM.US **fell 0.77%** to $14.40, posting the largest decline among primary constituents.

On the derivative ETF front, 2x leveraged MUU.US **dropped 0.04%** to $28.29 in after-hours, while inverse ETF MUD.US **gained 0.28%** to $10.72; SNXX.US **slid 0.23%** to $13.31, and SNDQ.US **inched up 0.07%** to $14.90. After-hours volume remained subdued compared to regular session levels as investors awaited fresh catalysts to drive directional moves.

## Sector constituents

| Name              | Ticker  | Last    | Change |
| ----------------- | ------- | ------- | ------ |
| Western Digital   | WDC.US  | 413.00  | +0.25% |
| MUD               | MUD.US  | 10.72   | +0.28% |
| SNDQ              | SNDQ.US | 14.90   | +0.07% |
| Seagate           | STX.US  | 771.70  | -0.01% |
| SanDisk           | SNDK.US | 1530.20 | -0.05% |
| MUU               | MUU.US  | 28.29   | -0.04% |
| Micron Technology | MU.US   | 925.89  | -0.18% |
| SNXX              | SNXX.US | 13.31   | -0.23% |
| MRAM              | MRAM.US | 14.40   | -0.77% |

### Related Stocks

- [MU.US](https://longbridge.com/en/quote/MU.US.md)
- [SNDK.US](https://longbridge.com/en/quote/SNDK.US.md)
- [WDC.US](https://longbridge.com/en/quote/WDC.US.md)
- [STX.US](https://longbridge.com/en/quote/STX.US.md)
- [MRAM.US](https://longbridge.com/en/quote/MRAM.US.md)

## Related News & Research

- [Micron Technology Is Ramping Up Production of High-Bandwidth Memory. Here's Why That Could Send the Stock to New Heights This Year](https://longbridge.com/en/news/298934681.md)
- ['Not the Same,' Says Investor About Micron Stock Ahead of Earnings](https://longbridge.com/en/news/299197500.md)
- [Insider Transaction: Gianluca Romano Sells $38.60M Worth Of Seagate Technology Hldgs Shares](https://longbridge.com/en/news/299339822.md)
- [William D Mosley Implements A Sell Strategy: Offloads $1.46M In Seagate Technology Hldgs Stock](https://longbridge.com/en/news/299203744.md)
- [‘Before It Wakes Up,’ Says Top Investor About Micron Stock](https://longbridge.com/en/news/299325951.md)

---
> **Disclaimer: This article is for reference only and does not constitute any investment advice.**