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Total declarations
Company
▲ Purchases (5 ops.)
▼ Sales (0 ops.)
Latest filing published 26 May 2026 for Amylyx Pharmaceuticals, Inc., €44k. Read the official filing
Filing timeline
BuySaleKaren Firestone
Insider track record
Disclosed buys
5
Disclosed sells
0
Signal history
Closed purchases
Market purchases
5
Positive at T+90
100%
Median T+90
+87.8%
Based on 2 purchases whose 90-day window has closed (published at least 91 days ago), the same population our ranking model reads.
Purchases by company
Since each purchase
- +100.0%Entry US$14.07 · Close 09 Oct 2026 US$28.14
- +9.4%Entry US$12.49 · Close at T+90 US$13.66
Entry is the close on the day after publication, the first price a reader could act on. Prices in the listing currency. Past moves are not a forecast.
Karen Firestone: trading record in brief
Karen Firestone is a declared insider of Amylyx Pharmaceuticals, Inc., with filings sourced from SEC (Form 4). Between 16 March 2023 and 21 May 2026, the trades on record add up to 5 filings.
Every open-market trade on record is a purchase: 5 purchases worth €311k, and no sale. Open-market purchases are the filings investors watch most closely, because the insider pays for the shares out of pocket. So far in 2026, the count stands at 1 purchase and no sales.
A typical purchase (the median) is worth €54k. On 1 out of 5 purchases, another insider of the same company was buying within the same 30 days. When several insiders buy within a few weeks of each other, analysts speak of a cluster purchase.
The latest filing, published on 26 May 2026, reports an open-market purchase of €44k in Amylyx Pharmaceuticals, Inc. Filings reach the SEC (Form 4) feed a median of 4 days after the trade. Section 16 rules allow two business days to file each Form 4. This summary is built from SEC (Form 4) disclosures alone and does not predict where the share price will go.
Companies and markets linked to Karen Firestone
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
Declarations5 total
3,800 shares@ US$13.510.0012% mcap14.2% of flowCommon StockSEC:0001193125-26-239216:0
Canonical exit: 19 Aug 2026 (T+90)
8,100 shares@ US$12.4527.6% of flowCommon StockSEC:0001193125-25-331289:0
Canonical exit: 23 Mar 2026 (T+90)
50,000 shares@ US$2.131830.9% of flowCommon StockSEC:0000950170-24-104737:0
Canonical exit: 4 Dec 2024 (T+90)
4,000 shares@ US$14.9717.5% of flowCommon StockSEC:0000950170-23-071533:0
Canonical exit: 14 Mar 2024 (T+90)
1,000 shares@ US$31.999.7% of flowCommon StockSEC:0000899243-23-009172:0
Canonical exit: 14 Jun 2023 (T+90)
5 of 5 declarations
