13F

Stock

Allurion Technologies Inc

Ticker not mapped · held by 3 managers

Reported value

$2

Holders

3

+1 new · −28 exited

Holders’ est. mark

$1

Price effect on 2 books still in the name

Largest holder

$2

LONGFELLOW INVESTMENT MANAGEMENT CO LLC

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
LONGFELLOW INVESTMENT MANAGEMENT CO LLC77$2$1Added$1
HARBOUR INVESTMENTS, INC.6$0New
Investors Research Corp6$0$0Held

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.