Research
Original data reports from the AlphAI feed — insider-trading roundups from SEC Form 4 filings and market-sentiment breakdowns. Free to read and cite.
- September 21 – 27, 2026October 2, 2026
Sentiment Heatmap — Week of September 21, 2026
AlphAI classified 11,166 ticker level sentiment reads across 9,109 news articles the week of September 21, 2026. Net tone came in at 35.2% bullish, up from 30.1% the week before and back in line with the six weeks from early August to early September, which ran between 35.2% and 36.6% on today's count. The week opened strong at plus 49.8 on Monday and bottomed at plus 23.5 on Thursday, when a bond selloff met a cluster of single company events. All twelve sectors finished positive for a third straight week, led by crypto.
- September 21 – 27, 2026September 30, 2026
Insider Radar — Week of September 21, 2026
Reported insider buying was $381.2 million in the week of September 21 and selling was $2.06 billion, a ratio of 5.4 to 1 against a median of 11.7 over the preceding twenty-six weeks. Almost half of the buying is one holder: Berkshire Hathaway added $188.2 million of Lennar in its second week of Form 4 filings on the company. Purchases by officers and directors came to $79.7 million, led by the chief executives of Grab and GameStop. It was also a light week, with 558 filings against 904 to 1,296 in each of the three before it.
- September 14 – 20, 2026September 25, 2026
Sentiment Heatmap — Week of September 14, 2026
AlphAI classified 11,520 ticker level sentiment reads across 9,059 news articles the week of September 14, 2026. Net tone came in at 30.1% bullish, the weakest reading since the week of July 27 and the first break of the 35.0 to 36.5 percent band that had held for six straight weeks. Monday and Tuesday carried the whole move, at plus 14.1 and plus 27.3 against plus 38 to plus 40 from Thursday on. Volume turned back up for the first time since August 24, 11,520 reads against 9,901, though the level is still well under the August peak.
- September 14 – 20, 2026September 23, 2026
Insider Radar — Week of September 14, 2026
Reported insider buying was $358.3 million in the week of September 14 and selling was $2.83 billion, a ratio of 7.9 to 1 against a median of 13.0 over the preceding twenty-six weeks. By the ratio alone this was a mild week. The buy side does not support that reading: 76% of it is 10%-owner entity activity, another slice is stock crossing between related accounts, and purchases by actual individuals came to $38.8 million. The one genuinely new position is Berkshire Hathaway's first ever Form 4 on Lennar, filed because it had just crossed the 10% ownership threshold.
- September 7 – 13, 2026September 18, 2026
Sentiment Heatmap — Week of September 7, 2026
AlphAI classified 9,859 ticker-level sentiment reads across 7,949 news articles the week of September 7, 2026. Net tone came in at 36.4% bullish, the sixth straight week inside a narrow 35 to 36.5 percent band. All twelve sectors finished positive for the first time since this series began in July, led by Energy at plus 57%. It was also the lightest week of the series by volume, 11% under the prior one, and reads have now fallen six weeks running.
- September 7 – 13, 2026September 16, 2026
Insider Radar — Week of September 7, 2026
Reported insider buying was $466.5 million in the week of September 7 and selling was $2.20 billion, a ratio of 4.7 to 1 against a median of 13.0 over the preceding twenty-six weeks. Almost two thirds of the buying is one holder, Cascade Investment, in its fourth consecutive week of adding to Republic Services. Strip that one program out and the week sits at 12.4 to 1, which is the norm. The selling was mostly private equity leaving three companies it took public, and a third of the rest was scheduled months ago.
- August 31 – September 6, 2026September 11, 2026
Sentiment Heatmap — Week of August 31, 2026
AlphaAI classified 11,127 ticker-level sentiment reads across 8,651 news articles the week of August 31, 2026. Net tone came in at 35.5% bullish, matching the prior week to the decimal and sitting at the top of a range that has held between 29% and 36% since late July. Eleven of the twelve sectors finished positive, led by Energy at plus 69%. Consumer Defensive was the only sector in the red, and it was negative largely because of one antitrust investigation that names six of its companies at once.
- August 31 – September 6, 2026September 10, 2026
Insider Radar — Week of August 31, 2026
Insider selling rose 51% to $3.17 billion in the week of August 31 while reported buying fell 31% to $497.2 million, a ratio of 6.4 to 1 against a median of 14.0. Both numbers need reading. Of the selling, $394.8 million was not discretionary at all, it is cash paid to Crinetics and Apogee insiders when those two takeovers closed. On the buy side Cascade Investment supplied 70% of the total, and every officer and director in the market bought $50.5 million between them.
- August 24 – 30, 2026September 4, 2026
Sentiment Heatmap — Week of August 24, 2026
AlphaAI classified 11,670 ticker-level sentiment reads across 9,213 news articles the week of August 24, 2026. Net tone came in at 35.5% bullish, the high end of a range that has held between 29% and 36% since late July, and eleven of the twelve sectors finished positive. Cryptocurrency led at plus 68% as bitcoin cleared $80,000 on ETF inflows and a weaker dollar. Communication Services was the only sector in the red, and it was negative because of one company.
- August 24 – 30, 2026September 2, 2026
Insider Radar — Week of August 24, 2026
Insider selling fell by more than half to $2.10 billion in the week of August 24, the lightest week since July 20, and reported buying nearly doubled to $658.7 million. The composition undercuts both numbers. Bill Gates's Cascade Investment took $306.1 million of Republic Services for a third straight week, and Ernesto Bertarelli bought a $219.0 million block of Madison Air at $24.97 on a day a director of the same company paid $27.84 in the market. Strip the 10% holders out and officers and directors bought $117.2 million, 18% of the total and the lowest share in the twenty-seven weeks we have measured.
- August 17 – 23, 2026August 28, 2026
Sentiment Heatmap — Week of August 17, 2026
AlphaAI classified 11,309 ticker-level sentiment reads across 8,795 news articles the week of August 17, 2026. Net tone held at 34% bullish, with eleven of the twelve sectors positive. Cryptocurrency led the board at plus 72%, as bitcoin's short squeeze and a US Treasury bond buyback eased yields enough to lift risk appetite broadly. Communication Services was the lone laggard at minus 9%, as Meta absorbed a fresh $1.4 trillion youth-safety lawsuit.
- August 17 – 23, 2026August 27, 2026
Insider Radar — Week of August 17, 2026
Insider selling eased to $5.09 billion in the week of August 17 and reported buying fell 39% to $309.6 million, but the composition is what stands out. Officers and directors accounted for just $79.2 million of the buying, 26% of the total and the lowest share in the twenty-six weeks we have measured. A single 10% holder, Bill Gates's Cascade Investment, put up $216.0 million of it, adding Republic Services for the second straight week. The only individual purchase above $10 million came from Energy Transfer director Kelcy Warren, who bought a million units for $21.3 million.
- August 10 – 16, 2026August 21, 2026
Sentiment Heatmap — Week of August 10, 2026
AlphaAI classified 12,890 ticker-level sentiment reads across 10,397 news articles the week of August 10, 2026. Net tone held at 35% bullish, level with the series high set a week earlier, but the clean sweep did not repeat: cryptocurrency swung to minus 8%, the only sector in the red, as XRP fell below $1 after a bridge hack and bitcoin lost the $64,000 level. Energy took the top of the board at plus 53% on a $5 billion pipeline joint venture and a run of contract awards, and Trump Media turned in the most lopsided read of the week, 87 bearish and none bullish.
- August 10 – 16, 2026August 20, 2026
Insider Radar — Week of August 10, 2026
Insider selling climbed to $6.15 billion in the week of August 10, the heaviest weekly total in ten weeks, and the biggest blocks were private equity sponsors leaving at negotiated prices: Corebridge, First Advantage, OPENLANE, Savers Value Village, Life Time. Reported buying rose 70% to $501.7 million, the most in nine weeks, but nearly half of it is one holder, Bill Gates's Cascade Investment adding $218.7 million of Republic Services. The cleanest individual signals: Intel CEO Lip-Bu Tan bought $10.0 million of stock at $95.00, and John Malone added $13.6 million of Liberty Capital. Scheduled plans did $1.45 billion of the selling, about 24% of open-market sales.
- August 3 – 9, 2026August 14, 2026
Sentiment Heatmap — Week of August 3, 2026
AlphaAI classified 15,970 ticker-level sentiment reads across 13,015 news articles the week of August 3, 2026. Net tone reached 35% bullish, the highest in the five weeks this series has run, and for the first time every one of the twelve sectors finished net positive. Earnings did most of the work: they made up 43% of all reads and graded net plus 48%. What went the other way was legal and consumer, with Meta drawing the week's most one-sided bearish read on a billion-dollar child-safety verdict.
- August 3 – 9, 2026August 12, 2026
Insider Radar — Week of August 3, 2026
Form 4 volume nearly doubled to 1,473 filings in the week of August 3 as trading windows reopened after the July earnings wave, and insider selling climbed to $5.05 billion, the heaviest week since early June. Reported buying more than doubled to $269.4 million, but about 74% of it arrived at prices fixed in advance, led by a $159.0 million Braveheart Bio financing reported on Form 4. Strip the fixed-price money out and the conviction list is short, headed by Boston Scientific's chief executive paying $9.0 million on the open market. Scheduled plans did $2.13 billion of the selling, about 43% of open-market sales.
- July 27 – August 2, 2026August 7, 2026
Sentiment Heatmap — Week of July 27, 2026
AlphaAI classified 13,895 ticker-level sentiment reads across 10,931 news articles the week of July 27, 2026. News tone held at net 29% bullish, within a point of last week's series high, but the AI trade split in two: Microsoft's record single-day gain and Amazon's blowout quarter on one side, Meta's cash burn, Apple's chip-squeeze forecast and a trillion-dollar chip drawdown on the other.
- July 27 – August 2, 2026August 5, 2026
Insider Radar — Week of July 27, 2026
Insider selling snapped back to $3.84 billion in the week of July 27, from $815.8 million the week before, making it the heaviest selling week in our coverage. What stands out is who did the selling. Of the twelve filings above $50 million, ten came from institutions and holding companies rather than from executives, led by Blackstone entities exiting Jersey Mike's. Buying stayed thin at $107.9 million, and about 60% of it was money that came in at a price agreed in advance.
- July 20 – July 26, 2026July 31, 2026
Sentiment Heatmap — Week of July 20, 2026
AlphaAI classified 9,571 ticker-level sentiment reads across 7,384 news articles the week of July 20, 2026. News tone ran net 30% bullish, the strongest week in this series so far. An AI dealmaking wave and broad earnings beats swung Technology from net negative to plus 42%, while Tesla's earnings miss, a $1 billion EU fine for Google and a court order freezing the Paramount-Warner Bros. merger anchored the bearish side.
- July 20 – July 26, 2026July 29, 2026
Insider Radar — Week of July 20, 2026
Insider selling in the week of July 20 fell to $815.8 million, the lowest weekly total in AlphaAI's Form 4 coverage. The cause was not a wave of conviction. The large blocks that normally carry these totals simply did not appear, and exactly one filing in the entire US market cleared $50 million. Buying was quiet too at $114.6 million, and nearly half of that was IPO and placement money rather than anyone's read on their own stock.
- July 13 – July 19, 2026July 24, 2026
Sentiment Heatmap — Week of July 13, 2026
AlphaAI classified 7,010 ticker-level sentiment reads across 4,960 news articles the week of July 13, 2026. News tone ran net 15% bullish. Record big-bank earnings and a $53 billion bid for PayPal carried the bullish side, while IBM's 25% earnings crash and a memory-chip rout flipped Technology net negative.
- July 13 – July 19, 2026July 22, 2026
Insider Radar — Week of July 13, 2026
Insider buying in the week of July 13 looked far heavier than normal, but almost all of it was one filing. Sumitomo Mitsui's $318.7M purchase of Jefferies stock was 70% of the week's buying, and once you also set aside $64M of preferred-stock placements, genuine officer and director conviction stayed small. Four takeovers closed in the same five days, which put another $316M of insider dispositions on the tape that had nothing to do with anyone's view of the stock.
- July 6 – July 12, 2026July 18, 2026
Sentiment Heatmap — Week of July 6, 2026
AlphaAI classified 7,085 ticker-level sentiment reads across 5,092 news articles the week of July 6, 2026. News tone ran net 21% bullish. Energy led on an oil spike, cryptocurrency lagged, and Apple's chip deal with Broadcom topped the leaderboard while Microsoft's Xbox layoffs anchored the bottom.
- July 6 – July 12, 2026July 13, 2026
Insider Radar — Week of July 6, 2026
Insider selling ran about 22 times insider buying in the week of July 6, a bit above the recent norm. A third of the $96.6M of buying was a single 10% owner adding to its stake in avocado producer Mission Produce, while the largest sale was a $401M open-market disposition of SharkNinja by its controlling holder, ahead of Rocket Lab CEO Peter Beck's $286M scheduled-plan sale.
- June 29 – July 5, 2026July 6, 2026
Insider Radar — Week of June 29, 2026
In the holiday-shortened trading week around July 4, insider buying stayed thin: $73M against $2.44B of selling, a 33:1 ratio far above the recent norm. More than half the selling was scheduled months in advance, and the single biggest buy was Uber taking $20M of Lime, a strategic stake rather than an insider's bet.
- June 22–28, 2026July 4, 2026
Insider Radar — Week of June 22, 2026
Insider selling always dwarfs buying, and this week it ran at $13.40 sold per dollar bought, right at the recent norm. The catch: the biggest 'buys' were a biotech financing round, an IPO-priced allocation taken by five insiders at one fixed price, and a controlling holder accumulating preferred, not fresh conviction.