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Insider filing · ZBIO

Fairmount Funds Management LLC bought $3.0M of Zenas BioPharma (ZBIO)

Executed Mar 31, disclosed Apr 1, 1 day later.

Value, as filed
$3.0M
150,000 sh × $20.00
Executed
Mar 31
the trade date, as filed
Disclosed
Apr 1
1 day after the trade
Return, 21 sessionsiFrom the disclosed entry session; derived
-5.2%
-6.0% from execution

Over the 21 trading sessions from the disclosed entry session (Apr 1), the stock returned -5.2% (delay-adjusted); from the execution session (Mar 31), -6.0%. Derived: entry at the session's open, exit at the close 20 sessions later.

The filer
FL Fairmount Funds Management LLC Director profile →

Fairmount Funds Management LLC (Director) filed 10 Form 4 reports as a reporting entity in the trailing twelve months (6 purchases, 4 sales), most often in Cogent Biosciences, Inc. (COGT). Across 6 priced purchase filings, the average 21-session return was +5.9% from execution and +8.5% from disclosure (delay-adjusted; derived). The largest single filing was $399.7M of SYRE (4,684,781 sh × $85.31, as filed), executed Jun 23.

The name
ZBIO Zenas BioPharma, Inc. ZBIO · Healthcare · 18 filings in 24 months ticker →

Healthcare · Zenas BioPharma, Inc., a clinical-stage biopharma company, engages in the development and commercialization of transformative immunology-ba…

More Healthcare filings Insider filings, newest first View the original filing at www.sec.gov
Other filings by Fairmount Funds Management LLC in ZBIO
ZBIOPURCHASE Zenas BioPharma, Inc. $6.0M
316,219 sh × $19.00
Exec Oct 7 2025
Filed Oct 9 2025 · 4:15 PM ET
ZBIOPURCHASE Zenas BioPharma, Inc. $5.1M
300,000 sh × $17.00
Exec Sep 16 2024
Filed Sep 17 2024 · 5:30 PM ET