Public ownership evidence

Larimar Therapeutics, Inc. Common Stock (LRMR) Ownership Disclosures

Read LRMR insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-10-10T12:08:28.848Z

Separate the three disclosure sources

Step 1 of 3

Recent Form 4 activity

Larimar Therapeutics, Inc. Common Stock: source evidence dated 2026-10-10T12:08:28.848Z.

Available
2026-10-01
Trade date
2026-09-29
Reporting owners
Harlow John B. Jr.
Code
A
Shares
800,000
Reported value
Not reported
What you should see

The displayed owner or issuer and source fields identify the receipt to verify; keep reporting and availability dates separate.

Step 2 of 3

Is this an insider transaction, 13F holding, or Congressional event?

Each source has different dates and units. Raw ticker-matched receipts, including amendments, are not deduplicated current ownership totals.

SEC 0001193125-26-410719
What you should see

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Step 3 of 3

Read LRMR fundamentals

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Read LRMR fundamentals
What you should see

Keep reporting dates and units beside the answer, and inspect its original citations.

Recent Form 4 activity

See the complete recent form 4 activity
2026-10-012026-09-29Harlow John B. Jr.A800,000Not reported
2026-10-012026-09-29Harlow John B. Jr.A50,000Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

Corient Private Wealth LP2026-06-302026-08-2822,675$69,159None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25661$2,016None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-252,016$661,000None
MERCER GLOBAL ADVISORS INC /ADV2026-06-302026-08-2068,934$210,249None
Seven Fleet Capital Management LP2026-06-302026-08-18230,921$704,309None
Defilade Capital Management, L.P.2026-06-302026-08-153,670,135$11,193,912None
SummitTX Capital, L.P.2026-06-302026-08-15352,284$1,074,466None
Graham Capital Management, L.P.2026-06-302026-08-1512,407$37,841None
SEI INVESTMENTS CO2026-06-302026-08-1510,573$32,248None
Federation des caisses Desjardins du Quebec2026-06-302026-08-152,500$7,625None
JPL Wealth Management, LLC2026-06-302026-08-1515$46None
Susquehanna Portfolio Strategies, LLC2026-06-302026-08-15165,156$503,726None
ADAR1 Capital Management, LLC2026-06-302026-08-15272,745$831,872None
DIADEMA PARTNERS LP2026-06-302026-08-15146,637$447,243None
Velan Capital Investment Management LP2026-06-302026-08-1533,000$100,650None
XTX Topco Ltd2026-06-302026-08-1555,209$168,387None
Fi3 FINANCIAL ADVISORS, LLC2026-06-302026-08-152,915$1,263,896None
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2026-06-302026-08-15206,969$631,255None
Sixth Street Partners Management Company, L.P.2026-06-302026-08-15206,969$631,255None
ExodusPoint Capital Management, LP2026-06-302026-08-1590,413$275,760None
Qube Research & Technologies Ltd2026-06-302026-08-151,641,042$5,005,178None
Caption Management, LLC2026-06-302026-08-15193,018$588,705None
OSAIC HOLDINGS, INC.2026-06-302026-08-151,211$3,693None
Squarepoint Ops LLC2026-06-302026-08-15113,474$346,096None
Man Group plc2026-06-302026-08-15113,049$344,799None
MetLife Investment Management, LLC2026-06-302026-08-1539,798$121,384None
Engineers Gate Manager LP2026-06-302026-08-1522,557$68,799None
JANE STREET GROUP, LLC2026-06-302026-08-1573,736$224,895None
JANE STREET GROUP, LLC2026-06-302026-08-1528,200$86,010Put
SPHERA FUNDS MANAGEMENT LTD.2026-06-302026-08-15926,004$2,824,312None
Legal & General Group Plc2026-06-302026-08-156,460$19,671None
RTW INVESTMENTS, LP2026-06-302026-08-152,565,999$7,826,297None
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15269,500$821,975Call
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15518,300$1,580,815Put
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15144,428$440,505None
Hudson Bay Capital Management LP2026-06-302026-08-1511,000$33,550None
DAFNA Capital Management LLC2026-06-302026-08-152,008,164$6,124,900None
MILLENNIUM MANAGEMENT LLC2026-06-302026-08-151,333,037$4,065,763None
DEERFIELD MANAGEMENT COMPANY, L.P.2026-06-302026-08-1535,606,974$108,601,271None
Balyasny Asset Management L.P.2026-06-302026-08-1517,006$51,868None
Alyeska Investment Group, L.P.2026-06-302026-08-15617,211$1,882,494None
MAI Capital Management2026-06-302026-08-154,808$14,664None
MAI Capital Management2026-06-302026-08-155,671$17,297None
Cerity Partners LLC2026-06-302026-08-158,337$25,428None
Cerity Partners LLC2026-06-302026-08-15240,268$732,817None
Cerity Partners LLC2026-06-302026-08-1522,977$70,081None
Woodline Partners LP2026-06-302026-08-151,400,850$4,272,593None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-154,820$14,701None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-1517$52None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-1510,873$33,163None

90-day public filing window, up to 50 source positions.

Corient Private Wealth LP ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗MERCER GLOBAL ADVISORS INC /ADV ↗Seven Fleet Capital Management LP ↗Defilade Capital Management, L.P. ↗SummitTX Capital, L.P. ↗Graham Capital Management, L.P. ↗SEI INVESTMENTS CO ↗Federation des caisses Desjardins du Quebec ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

No records are available for this view.

Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.

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