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Joel Greenblatt's Amprius Technologies, Inc. (AMPX) position

Yes: as of Q1 2026, Joel Greenblatt holds 40K shares of AMPX worth $666K (0.0% of the disclosed portfolio). Last quarter the position was opened. First disclosed Q1 2026.
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Current value
$666K
Shares held
40K
% of portfolio
0.0%
Est. average buy price (i)
$13.04
Quarter-end price
$16.86

Estimated trade prices

Average price in quarters with purchases
$13.04

AMPX price vs Greenblatt's position

1Y 3Y 5Y MAX
Dates
$0.7$20$402023202420252026New position of 40K shares · Q1 2026. Average closing price $13.04 · Price range $8.74–$19.3840Ksharespurchased
Average closing price · filing quarter
$13.04
Price range · filing quarter
$8.74 – $19.38
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Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 New +40K +$515K – 40K May 15, 2026
Data through Q1 2026 · filed May 15, 2026
1 grouped rows from 1 quarters

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Common questions

Does Joel Greenblatt own AMPX?

Yes. As of Q1 2026, Joel Greenblatt disclosed 40K shares of AMPX, worth $666K. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Joel Greenblatt buy AMPX?

Joel Greenblatt first disclosed a AMPX position in Q1 2026; every quarterly buy and sell since is in the table above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Joel Greenblatt sell AMPX?

The quarter-by-quarter table above shows each sale and reduction Joel Greenblatt disclosed in AMPX. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of AMPX does Joel Greenblatt own?

Joel Greenblatt disclosed 40K shares of AMPX as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Joel Greenblatt pay for AMPX?

Joel Greenblatt's estimated average buy price for AMPX is $13.04, from quarter-average prices weighted by the shares added each quarter. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.