Fairmount Funds Management LLC
SEC Form 4 insider trading activity
Fairmount Funds Management LLC has filed 15 SEC Form 4 filings (22 transaction rows) across 8 companies, including APGE, CBIO, ORKA, with disclosures dating back to 2025. 12 of those filings fall inside the rolling window. Most recent filing: Sep 3, 2026.
On the most recent filing, Fairmount Funds Management LLC is listed as Director, 10% Owner at CRESCENT BIOPHARMA, INC. Inside the rolling window, Fairmount Funds Management LLC reported 5 open-market purchases totaling $63.6M in CBIO and VRDN and ZBIO and 4 open-market sales totaling $1.1B in ORKA, SYRE, COGT and 1 more. The largest disclosed transaction in the window is a sale of 4,684,781 SYRE shares on Jun 23, 2026, worth $399.7M.
Companies traded
Other insiders at APGE
Insider Buying
$63.6M
reported purchases (SEC code P)
Insider Selling
$1.1B
reported sales (SEC code S)
Companies
8
in the rolling window
| Source | |||||||
|---|---|---|---|---|---|---|---|
| CBIO | Director, 10% Owner | Purchase | 853,450 | $12.4M | Jul 20 | SEC ↗ | |
| ORKA | Director, 10% Owner | Sale | 3,553,410 | $300.0M | Jul 2 | SEC ↗ | |
| SYRE | Director | Sale | 4,684,781 | $399.7M | Jun 24 | SEC ↗ | |
| VRDN | Director, 10% Owner | Purchase | 1,176,470 | $20.0M | May 13 | SEC ↗ | |
| ZBIO | Director | Purchase | 150,000 | $3.0M | Apr 1 | SEC ↗ | |
| COGT | Director | Sale | 7,000,000 | $242.6M | Mar 31 | SEC ↗ | |
| APGE | Director | Sale | 1,750,000 | $133.5M | Jan 22 | SEC ↗ | |
| CBIO | Director, 10% Owner | Purchase | 1,360,000 | $18.2M | Dec 8 | SEC ↗ | |
| VRDN | Director, 10% Owner | Purchase | 454,545 | $10.0M | Oct 27 | SEC ↗ |
Earlier trades
Open-market purchases and sales filed before the rolling 365-day window, kept from the original Form 4 filings.
| Date | Ticker | Type | Value |
|---|---|---|---|
| Oct 7, 2025 | ZBIO | Purchase | $6.0M |
Frequently asked questions
How many SEC Form 4 filings has Fairmount Funds Management LLC made?
Fairmount Funds Management LLC has filed 15 SEC Form 4 filings (22 transaction rows) across 8 companies, including APGE, CBIO, ORKA since 2025.
Which companies does Fairmount Funds Management LLC trade?
Fairmount Funds Management LLC has filed SEC Form 4 disclosures for 8 companies, including APGE, CBIO, ORKA.
When was Fairmount Funds Management LLC's most recent SEC Form 4 filing?
Fairmount Funds Management LLC's most recent SEC Form 4 filing on Tracefour is dated Sep 3, 2026.
What is Fairmount Funds Management LLC's total buy and sell value in the current window?
Inside the rolling retention window, Fairmount Funds Management LLC bought $63.6M and sold $1.1B based on SEC Form 4 filings.
What was Fairmount Funds Management LLC's largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 4,684,781 SYRE shares on 2026-06-23, worth $399.7M, per SEC Form 4 filings.