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SEC EDGAR · Forms 3/4/5Updated through Oct 30, 2026•31 filings

CBIO

CRESCENT BIOPHARMA, INC.

No net buying or selling imbalance over the last 3 months

No net buyers or sellers account for the net balance. There is no cluster of three distinct buyers within 30 days. We found no CEO/CFO purchases over 12 months.

How to read this signal

Only open-market P purchases and S sales count toward the signal. Vesting, options, taxes and gifts remain in the source data but do not trigger alerts. Rule 10b5-1 trades are shown as informational.

JSON example

3-month balance

$0.00

0 buyers · 0 sellers

12-month purchases

$40,000,004

4 distinct insiders

12-month sales

$0.00

0 distinct insiders

Highlighted alerts

4

0 Rule 10b5-1 trades treated as informational

Buying cluster · 30 days

Fewer than three distinct buyers

CEO/CFO purchases · 12 months

No executive purchases found

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Form 4 raw → Raspberry

The value is in what we do not call a signal.

The SEC XML stores every transaction. Raspberry keeps that evidence, reads the footnotes and separates voluntary open-market activity from vesting, option exercises, gifts, tax withholding, stock purchase and dividend reinvestment plans and pre-programmed 10b5-1 trades.

51
Raw transactions
Everything returned by the filing
4
Voluntary view
P/S trades after deterministic checks
47
Administrative noise
Stored, never alerted
16
10b5-1
Shown as informational
SEC ownership XML facts
Code
S
Shares
7,837
Price
$16.71
Footnotes
2

Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the settlement of restricted stock units granted to the Reporting Person on December 15, 2025 and March 17, 2025. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on February 28, 2026, solely with the intent to cover taxes in connection with the vesting of the restricted stock units. The prices reported in Column 4 are weighted average prices. These shares were sold in multiple transactions at prices ranging from $17.10 to $19.17 on September 16, 2026 and from $16.15 to $17.23 on September 18, 2026, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price at which the transactions were effected.

Raspberry interpretation
Informational — no alert

Reason: tax_withholding. The filing footnotes identify tax withholding. The trade is reported under a Rule 10b5-1 plan.

Verify in SEC EDGAR

Recent transactions

Voluntary purchases and sales; administrative noise stays hidden.

4 transactions

Fairmount Funds Management LLC

Director

PurchaseAlert
Shares
853,450
Price
$14.50
Value
$12,375,025
Open SEC filing

Fairmount Funds Management LLC

Director

PurchaseAlert
Shares
525,897
Price
$14.50
Value
$7,624,981
Open SEC filing

Fairmount Funds Management LLC

Director

PurchaseAlert
Shares
1,360,000
Price
$13.41
Value
$18,237,600
Open SEC filing

Fairmount Funds Management LLC

Director

PurchaseAlert
Shares
131,434
Price
$13.41
Value
$1,762,399
Open SEC filing

“Alert” means a voluntary, unscheduled transaction according to the filing; it is not an investment recommendation. Official source: SEC EDGAR.