Three Datadog insiders sold Thursday morning. By Friday close, the stock had jumped 39%. They left $900K on the table.

Kerry Acocella, the general counsel, moved $2.1M out at $143.71. Julie Richardson unloaded $75K. Sean Walters, the chief revenue officer, sold $287K. All three trades were pre-planned, filed months ago under 10b5-1 schedules. By the time the market closed Friday, Datadog sat at $200.16. Acocella's shares alone would have been worth $2.9M if she'd waited one day. That's an 84 RSI, 1% from the 52-week high, trading at 453 times earnings with a 3% net margin. The stock reported earnings Thursday, the same day all three insiders sold. They beat estimates by 6.3%. The schedule didn't care. The trades executed anyway. Pre-planned sales are clockwork until they're not, and this week they cost three people nearly a million dollars in forty-eight hours.

One other executive sold before good news. Charles Giancarlo at Arista Networks moved $1.4M out Tuesday at $172.62, also pre-planned. Arista reported earnings Tuesday. The stock dropped 18% by Friday. Giancarlo walked away before a company trading at 63 times earnings fell below both moving averages and landed with a 38 RSI. His last eight trades have all been sells. No buys in twelve months. He sold 4% of his position, which means he still owns 208,333 shares that just lost $6.4M in value this week. The 10b5-1 plan saved him on timing but couldn't save the rest of his holdings. That's the gap between scheduled exits and actual conviction.

The rest of the selling was harder to miss. $849M walked out the door this week across 137 insider sales. Information technology led at $270M, 48 insiders across 20 companies, zero buying. NVIDIA, Microsoft, Apple, Qualcomm, Micron, CrowdStrike, Lam Research, Intel. The list reads like the top holdings of every growth fund in the market. Micron's CEO sold $21.5M while the stock gained 12%. Sanjay Mehrotra has now moved $47M in the past 30 days, all pre-planned. The CLO added another $4.1M. CrowdStrike's CEO sold three times in one week for a combined $7.9M. George Kurtz has traded ten times in the past month. Qualcomm's CEO sold twice, $3.7M total. The pattern isn't subtle. Tech insiders are exiting methodically while their stocks climb into overbought territory and the sector holds near all-time highs.

Financials were worse by total dollars. $247M in selling versus $4M in buying, a 98% sell-side tilt. Goldman Sachs CLO Kathryn Ruemmler sold twice in one week, $14.1M combined. Charles Schwab himself moved $20M out of his own company while the stock dropped 4%. Bank of America, JPMorgan, Morgan Stanley, regional banks. The sector's insiders are not holding. What they are doing is filing 10b5-1 plans and letting those plans execute while the stocks drift lower. Schwab has traded three times in the past month, all sells. The company he founded is down, and he's been reducing all year.

Here's the piece that doesn't fit the scheduled-sale narrative. Six insiders bought real estate this week. Joel Marcus, the executive chairman of Alexandria Real Estate, bought three separate times for a combined $1.1M. Not scheduled. Discretionary. The stock gained 12% by Friday. Marcus put cash in while the sector sold $27.9M and most of it walked out of REITs trading near twelve-month lows. One buyer doesn't make a sector bullish, but it does make you ask why someone with access to the books decided this was the week to add $1.1M of exposure while everyone else was trimming.

Then there's the insider disagreement at Berkshire Hathaway. The company itself sold $182.9M this week. One insider, Michael O'Sullivan, bought $250K. Same stock, same week, opposite directions. Berkshire's entity-level selling has been relentless, but this is the first time in months an individual insider stepped in with discretionary buying while the parent entity liquidated. The stock gained 2% by Friday. O'Sullivan's buy was small relative to the entity sale, but the timing says he saw something worth his own money at $465 when the institutional side was exiting at the same price.

Rolling 30-day totals show the pattern widening. Information technology: 101 sells totaling $518M versus six buys totaling $45K. Energy: 12 sells, $49.5M out, versus 21 buys worth $232K. The buying in energy is scattered retail. The selling is executive-level. Financials show 60 sells at $404M against 15 buys at $16.8M. Consumer discretionary, health care, industrials, materials. Every sector shows the same directional tilt. Insiders are net sellers across the board, and the gap between sell volume and buy volume is getting wider.

Datadog reports again in three months. The three insiders who sold Thursday will have to decide whether to file new 10b5-1 plans or let their schedules lapse. If they file new ones, the market will treat it as routine. If they don't, that's when the absence of scheduled selling becomes the signal. Tesla reports next week. NVIDIA in two weeks. The tech insiders who've been exiting all month will keep exiting, and the question is whether their stocks keep climbing while they do it or whether the divergence between insider selling and stock performance finally closes. Monday's Daily Filing will have the answer to how the new week starts.