S&P Promotes FormFactor Into the MidCap 400, Where Funds Must Buy What Insiders Keep Selling
FormFactor enters the S&P MidCap 400 before the open on 6 October, obliging index funds to buy at whatever the tape shows, $148.44 at Thursday's close. That price sits above the average analyst target, at 102 times trailing earnings, in a stock insiders sold $22.1 million of over twelve months without buying a share.
Vincent Jiang · 3 min read
The rule sets a date, not a price
S&P Dow Jones announced after Thursday's close that FormFactor will replace Twilio in the S&P MidCap 400 before the open on Tuesday, 6 October 12. The chain started higher up: Twilio moves to the S&P 500 as Warner Bros. Discovery is absorbed by Paramount Skydance, FormFactor shifts up from the SmallCap 600, and Workiva takes its old seat 2.
Twilio rose 1.6 percent and Workiva 2.7 percent in extended trading, the visible edge of the buying the rule mandates 2. That is the whole mechanic in one line: the funds do not choose, they comply.
What the trackers will pay
FormFactor closed 1 October at $148.44, up 166.12 percent for the year 1. The valuation screens are loud: 102.3 times trailing earnings against a five-year median of 42.4, 39.9 times forward, and a fair-value model at $59.27, 151.9 percent under the 30 September price 3.
The average of 11 analyst targets is $145.44, 2.02 percent below the tape 1. The only target above the market that any cited source names is Deutsche Bank's $200, filed the day before the announcement 14.
Only Deutsche Bank's target stands above Thursday's close
- Estimate
Data
| Value | |
|---|---|
| GF Value model (estimate) | $59.27 |
| 11-analyst average target (estimate) | $145.44 |
| 1 Oct close | $148.44 |
| Deutsche Bank target (estimate) | $200 |
The filings show the exits
Insiders sold $22.1 million of stock over twelve months with no purchases 3. The Form 4 record is specific: chief executive Mike Slessor filed a sale in every month of 2026 through September, grossing $13,937,298, including 17,510 shares at $104.73 on 16 September and 16,002 at $130.95 on 14 August 5.
Every Form 4 listed for the company this year is a sale; director Sheri Rhodes cut her holding by 54 percent in June 5. The forms carry dates, quantities and prices. Motive is not a field on them.
FormFactor's CEO filed a sale every month of 2026, $13.9 million in total
Data
| CEO sale proceeds as filed | |
|---|---|
| Jan | $3,579,657 |
| Feb | $815,597 |
| Mar | $973,076 |
| Apr | $1,442,463 |
| May | $1,194,064 |
| Jun | $1,442,897 |
| Jul | $560,195 |
| Aug | $2,095,532 |
| Sep | $1,833,817 |
The Nvidia leg is the analyst's, not the company's
The business did inflect: second-quarter revenue hit a record $258.2 million, up 32 percent, non-GAAP gross margin reached 53.3 percent against 38.5 a year earlier, and high-bandwidth memory made up about two-thirds of DRAM sales 6. Revenue was still shrinking year on year as recently as the September 2025 quarter 7.
Revenue shrank as recently as September 2025, then hit a record $258.2 million
Data
| Revenue | |
|---|---|
| Q3 '24 | $207.92M |
| Q4 '24 | $189.48M |
| Q1 '25 | $171.36M |
| Q2 '25 | $195.8M |
| Q3 '25 | $202.68M |
| Q4 '25 | $215.16M |
| Q1 '26 | $226.14M |
| Q2 '26 | $258.24M |
But the Nvidia story under the multiple is borrowed. Deutsche Bank's George Brown wrote that FormFactor has "cemented itself" as the second source of chip-test gear for Nvidia's GPUs, a $500 million opportunity, with sales expected to start between July and December 4.
The company has never named the customer
FormFactor's own results name only "a newly qualified GPU program" due to begin contributing revenue in the second half 6. The Inference reported on 1 October, in "FormFactor Added $1 Billion of Market Value on an Nvidia Win It Hasn't Confirmed", that the customer behind that program has never been named.
Coverage of the initiation noted contract signals whose specifics were not disclosed 8, and at a 9 September conference Slessor framed the driver as advanced packaging and chiplets, not a named customer 9. Brown himself flags Technoprobe as a threat to the HBM lead 4.
Watch the 6 October open
The sellers of 2026 run the company; Tuesday's buyers cannot choose. The next reading that matters is the third-quarter print, guided to $270 million plus or minus $10 million 6. Holders can sell the index flow to the trackers instead of being the trackers. An index fund never gets a price target; it gets an effective date.
Deepdive
AI-generated from this story and its cited sources. Not investment advice.
