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Stock brief · the live tape
SNDKSandisk Corporation
Information Technology
$1,484.98
▲ $469.09 (+46.2%) · 30dclose Friday, August 28, 2026
Disclosed flow is mixed.
6 members · 11 disclosed trades · 24 insider filings
The Hill
▲ 5▼ 5
5 buys · 5 sellsThe Boardroom
▲ 0▼ 24
0 buys · 24 sells · 24 filingsFeeding Time13F lens lands with fund ingestion
What is behind it
Recent Signal Scores, decayed48
Events counted, 90d10
Net congressional flowbuying
The tape
Price with a twin dot per disclosed trade: filled at the trade, hollow at the filing. The dashed gap is what the market did in between, not anyone’s return.
trade (congress)filingtrade (insider)call legput leg
The cost of chasing
Each rail runs from their trade to their filing. The hatched part is the move a copier missed to the disclosure lag; the solid part is what copying at the filing kept.
Armstrong+141.1-6.6
Gottheimer+10.8-18.9
Cisneros+124.5+108.9
Cisneros+293.5+137.0
Median copy kept +51.2% from the filing vs +132.8% from the trade date; the lag took 81.6 pts. The S&P returned +7.8% over the same windows. Numbers describe the window shown; they are not a forecast.
Who is behind it
Congress members with a disclosed position, biggest first. Click through to their dossier.
Jefferson ShreveHouse · AppropriationsFiled this one in 31dsold$41KLisa C. McClainHouse · Financial Services · Education & WorkforceFiled this one in 21dmixed$24KGilbert Ray Cisneros, Jr.House · Armed Services · Small BusinessFiled this one in 25dbought$16KRobert P. Bresnahan, Jr.House · Transportation & Infrastructure · AgricultureFiled this one in 30dsold$16KAlan ArmstrongSenate · Health, Education, Labor & Pensions · Indian AffairsFiled this one in 116dbought$8K
Committee overlap is a fact, not an accusation. An option leg behind a share buy reads very differently from a plain purchase, so it is called out but never scored as intent.
The boardroom
Scheduled 10b5-1 sales are usually noise, set on autopilot months ago. The unscheduled ones are the tell.
Shek BernardChief Legal Officer & SectyScheduled · 10b5-1
Shek BernardChief Legal Officer & SectyScheduled · 10b5-1
Shek BernardChief Legal Officer & SectyUnscheduled
Shek BernardChief Legal Officer & SectyScheduled · 10b5-1
Ilkbahar AlperEVP, Chief Technology OfficerUnscheduled
Ilkbahar AlperEVP, Chief Technology OfficerUnscheduled
Ilkbahar AlperEVP, Chief Technology OfficerUnscheduled
Ilkbahar AlperEVP, Chief Technology OfficerUnscheduled
Goeckeler DavidChairman and CEO, DirectorUnscheduled
Shek BernardChief Legal Officer & SectyUnscheduled
Ilkbahar AlperEVP, Chief Technology OfficerUnscheduled
Visoso Luis FelipeEVP and Chief Financial OfficeUnscheduled
Shek BernardChief Legal Officer & SectyUnscheduled
Goeckeler DavidChairman and CEO, DirectorUnscheduled
Ilkbahar AlperEVP, Chief Technology OfficerUnscheduled
Goeckeler DavidChairman and CEO, DirectorUnscheduled
Shek BernardChief Legal Officer & SectyUnscheduled
Ilkbahar AlperEVP, Chief Technology OfficerUnscheduled
Pokorny MichaelVP, Chief Accounting OfficerUnscheduled
Caulfield ThomasDirectorUnscheduled
Pokorny MichaelVP, Chief Accounting OfficerUnscheduled
Sayiner NecipDirectorUnscheduled
Shek BernardChief Legal Officer & SectyUnscheduled
Ilkbahar AlperEVP, Chief Technology OfficerUnscheduled
The forward book
Every disclosed option leg on this ticker: what was filed, and where the strike sits versus today.
No disclosed option legs on SNDK yet. They plot here the day they file.
A call and a put are shown as filed. We do not infer whether a leg is a hedge or a leveraged bet, because the filing does not say. Read the strike and expiry, not an implied intent.
The fund book
Tracked 13F holders and how their position moved, quarter over quarter.
13F fund positions on SNDK light up when fund ingestion lands. Quarter-end marks, up to 45 days lagged, never live holdings.
Cross-check
When different sources file on the same name inside a window. Overlap like this is rare.
- Alan ArmstrongSenate · Health, Education, Labor & Pensions · Indian Affairs▲
- Josh GottheimerHouse · Intelligence · Financial Services▲
- Shek BernardChief Legal Officer & Secty▼
- Ilkbahar AlperEVP, Chief Technology Officer▼
- Goeckeler DavidChairman and CEO, Director▼
- Visoso Luis FelipeEVP and Chief Financial Office▼
Last 90 days · 6 filers converging
Sources file on different clocks; an overlap like this is rare.
⚠️ Public information, sourced from STOCK Act, Form 4 and 13F filings. Ranges use midpoints. Price paths between a trade and its filing are market moves, not anyone’s return. Not financial advice.