Why Is Fastly, Inc. (FSLY) Up 16% Today?
Tech's biggest mover today
Fastly, Inc. is the biggest Tech gainer on the board today. What follows is what can be sourced about why — and, where nothing can be, that is said plainly rather than filled in.
The move
FSLY trades at $29.30, up +15.9% on the session, with a market capitalisation of $4.59 billion.
Volume is 2.4 times the 30-day average, which is the part of a move that tells you whether anyone turned up for it.
Against its 52-week range of $7.74 to $34.82, today's price sits 80% of the way up it.
No company news on file
There is no company filing, analyst action or insider transaction on our record to explain today's move.
For context, Tech names are up an average of +1.2% today, so some of this is the sector rather than the company.
A move without a disclosed cause is common and not sinister. It is simply a move we cannot explain, and saying so is more useful than guessing.
| Metric | Value | Context |
|---|---|---|
| Change today | +15.9% | Tech average +1.2% |
| Volume | 15,145,871 | 2.4x the 30-day average |
| Market cap | $4.59 billion | Software - Application |
| Range | $7.74 – $34.82 | 52 weeks |
What insiders have been doing
10 open-market insider transactions are on file for the last 90 days.
Insider activity before a move is the one piece of context that carries money behind it rather than an opinion.
It is also disclosed late, so proximity to today's move should not be read as foreknowledge.
- September 29th, 2026sellBergman Artur · Director$100,055Form 4
- September 28th, 2026sellBergman Artur · Director$5,045Form 4
- September 28th, 2026sellBergman Artur · Director$813,731Form 4
- September 23rd, 2026sellBergman Artur · Director$708,831Form 4
- September 23rd, 2026sellBergman Artur · Director$7.90 millionForm 4
- September 23rd, 2026sellBergman Artur · Director$213,104Form 4
- September 23rd, 2026sellBergman Artur · Director$2.62 millionForm 4
- September 22nd, 2026sellBergman Artur · Director$776,178Form 4
- September 21st, 2026sellBergman Artur · Director$29,282Form 4
- September 21st, 2026sellBergman Artur · Director$1.26 millionForm 4
| Metric | Value | Context |
|---|---|---|
| Change today | +15.9% | Tech average +1.2% |
| Volume | 15,145,871 | 2.4x the 30-day average |
| Market cap | $4.59 billion | Software - Application |
| Range | $7.74 – $34.82 | 52 weeks |
The bottom line
A large move with no disclosed cause. That is worth knowing, and it is not a reason to act. Not investment advice. Summarized from public SEC Form 4 and congressional disclosure data.