Planet Labs PBC Stock Slides 20% Over 8 Straight Down Days
A persistent selling streak in this aerospace stock invites a closer look at the business fundamentals underneath the price action.
Planet Labs PBC (PL) stock has now moved lower for 8 consecutive trading days, a slide that has cut its price by a cumulative 20%. That streak has erased about $1.4 billion from the company’s market value, which now stands at about $5.8 billion.
For anyone holding the stock, the move is a sharp reversal from longer-term gains. The stock has returned +63.8% over the trailing twelve months.
PL versus the S&P 500, streak and beyond
Here is how PL stock stacks up against the S&P 500 over the streak and the periods around it:
| Return Period | PL | S&P 500 |
|---|---|---|
| 1D | -1.1% | -0.4% |
| 8D (Current Streak) | -19.9% | -1.1% |
| 1M (21D) | -35.1% | -2.6% |
| 3M (63D) | -47.6% | 0.4% |
| YTD 2026 | -18.8% | 10.8% |
| 2025 | 388.1% | 16.4% |
| 2024 | 63.6% | 23.3% |
| 2023 | -43.2% | 24.2% |
The fundamentals are mixed.
The recent selling is specific to the company, not the broader market. Over the same 8 trading days, the S&P 500 returned -1.1%. The sources for this note do not show why the move happened. Planet Labs PBC stock trades at about $16.02 a share as of 9/15/2026.
The company’s fundamentals present a mixed picture. Revenue over the last twelve months grew 44.1%, well ahead of the 7.3% median for S&P 500 Industrials stocks, though Planet Labs itself is a small-cap company outside the index. At the same time, its operating margin over the last twelve months is -27.2%, compared to a median of 17.6% for the same group. PL has negative trailing earnings.
A streak is information, not an instruction.
An extended move in either direction shows the market is paying close attention to this name. It is not, by itself, a reason to buy or sell.
The question to ask is whether the facts about the company have changed, or whether sentiment alone is moving the price. The numbers here provide a starting point for that work.
If the drop has you weighing an entry, resist buying on price alone. Our Buy the Dip screen ranks the marked-down names where growth and cash generation still hold up.
Those watching the group rather than this one name have another route: our ETF Scorecard shows how the U.S. industrials funds stack up. Any one of those funds is still a concentrated bet on that one theme, though, which is exactly the gap the portfolio below closes.
Falling prices test conviction. Rules do not flinch
A sharp drawdown often triggers emotional impulses—dumping shares out of fear, rushing to average down, or ignoring the thesis altogether. Any move driven by tape action rather than disciplined analysis tends to be an expensive one.
The Trefis High Quality (HQ) Portfolio takes the emotion out: about 30 quality businesses screened for the fundamentals that survive bad stretches, held and rebalanced by rules. It has a track record of outpacing a benchmark that combines the three major indices – the S&P 500, S&P Mid-cap, and Russell 2000. Let the rules decide, not the tape.