Transaction · 0001231919-26-001533

Ra Capital Management, L.P.

RA CAPITAL MANAGEMENT, L.P., DIR, reported an open-market or private purchase at Bambusa Therapeutics, Inc. involving 2335109.000000 shares for an estimated $37361744.00. Reported holdings after the transaction were 5933787.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market buySEC transaction code PDIR
BBTXBambusa Therapeutics, Inc.
Trade date
Nov 02, 2026
Filing date
Nov 03, 2026
View on SEC Insider profile
Disclosed value$37.3MShares × reported price
Shares traded2.33M$16.00 per share
Holdings after5.93MIndirect · See footnotes
% of reported position traded64.89%This security and ownership context
How reported position traded is calculated

Shares purchased ÷ (holdings after − shares purchased). Estimated position before: 3,598,678 shares.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

BBTX price since this filing

Daily closing prices, with the filing date and available return windows
BBTX · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago1w ago1d ago
Returns since7d30d90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Buy
Code P
Identifier
0001231919-26-001533
Common Stock
Transaction date
Nov 02, 2026
Filed Nov 03, 2026, 11:09 PM · 1d delay
Shares
2,335,109 sh
$16.00 per share
Estimated value
$37.3M
Computed from shares × price
Holdings after
5,933,787 sh
Indirect · See footnotes

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Cluster Buy Director Buy Large Buy Large Holdings Increase Repeat Buyer 10% Owner Buy
Filing-only score

+62 points

Compact filing score computed from stored Form 4 facts. Version v1.

Strong filing signal

This filing has a high positive filing-only score. It may deserve closer research, but it is not an investment recommendation.

How this score is calculated
  • open_market_purchase+12 points

    transaction_code = P

    Code P is a discretionary open-market purchase.
  • director_buy+6 points

    is_director = true

    Director open-market purchase.
  • cluster_buy+14 points

    cluster-buy signal matched

    Multiple insiders bought within the configured window.
  • repeat_buyer+8 points

    repeat-buyer signal matched

    Same insider bought again within the configured window.
  • large_buy_absolute+10 points

    large-buy signal with absolute_triggered = true

    Open-market purchase exceeds the configured absolute threshold.
  • large_holdings_increase+8 points

    large-holdings-increase signal matched

    Reported acquired shares meet the configured percentage of post-transaction holdings.
  • timely_filing+4 points

    reporting_delay_days = 1

    Filing reported within two business days of the transaction.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

No officer title

Officer NoDirector Yes10% YesOther No
Footnotes & amended
  1. F1

    The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.61 to $14.58 inclusive. The Reporting Persons undertake to p…

  2. F2

    RA Capital Management, L.P. (the "Adviser") is the investment manager for RA Capital Healthcare Fund, L.P. (the "Fund") and RA Capital Nexus Fund III, L.P. (the "Nexus Fund III"). The general partner…

  3. F3

    Held directly by the Fund.

  4. F4

    The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $14.65 to $15.00 inclusive. The Reporting Persons undertake to p…

  5. F5

    All shares of the preferred stock, par value $0.00001 per share, of the Issuer automatically converted on a one-for-one basis to shares of the Issuer's common stock, par value $0.00001 per share ("Com…

  6. F6

    Held directly by the Nexus Fund III.

Original filing · 0001231919-26-001533
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