Reporting owner · CIK 0001586788

Quisel John D

Visual SEC Form 4 history across 2 companies, 19 transactions and 7 filings.

CEOChief Executive OfficerDisc Medicine, Inc.
Open-market mix
Latest filingAug 18, 2026, 10:56 PM
Filings7Form 4 records
Buying$00 purchases
Selling$3.7M6 sales
Net value−$3.7MBuys minus sells
Companies22 securities
Most recentAug 17, 2026exercise

Open-market buy performance

90-day forward return on this insider's open-market purchases

90d forward
Forward return is not available yet

We compute this from each buy's stock performance 90 days after the transaction. The price history is still being populated for this insider's their open-market buys, so the average and median will appear here once the daily price refresh has covered the relevant trading days.

Monthly open-market activity

Reported purchase and sale transaction counts

Buys Sells
530-3-5Dec 232Dec 241Feb 25Feb 26Jun 263Aug 26

Net value flow

Buys minus sells

Dec 23
$0
Dec 24
−$806.1K
Feb 25
−$304.2K
Feb 26
$0
Jun 26
$0
Aug 26
−$2.6M

Transaction texture

Ownership and ticket size

Average P/S size$620.4K
Median P/S size$671.8K
Direct19
Indirect0
Aug 17, 2026exercise

Filing-only signals

Deterministic matches in this insider's history

Cluster Sellingpattern1Derivative Transactionfiling-context7Direct Ownershipfiling-context19Large Holdings Increaseholdings5Large Holdings Reductionholdings1Large Salesize2Repeat Sellerpattern310b5-1 Detectedfiling-context11

Latest Form 4 facts

Quick context from source filings

Latest transaction

sale at Disc Medicine, Inc. on Aug 17, 2026 valued at $949,162.

Review SEC filing
Latest buy

No open-market insider purchase is available.

Latest sale

sale at Disc Medicine, Inc. on Aug 17, 2026 valued at $949,162.

Review SEC filing

Associated companies

Visual map of known reporting history

IRONDisc Medicine, Inc.18 transactions · latest Aug 18, 2026, 10:56 PMGOSSGossamer Bio, Inc.1 transactions · latest Jun 05, 2026, 09:45 PM
TickerInsiderRoleTypeSharesValueCodeSignals90d returnFiledTrans date
IRONQuisel John D
CEO
grant78.3k$0A
Direct Ownership Large Holdings Increase
—02/12/202502/10/2025
IRONQuisel John D
CEO
exercise10b5-110.0k$0M
Derivative Transaction Direct Ownership 10b5-1 Detected
—01/03/202512/31/2024
IRONQuisel John D
CEO
exercise10b5-113.0k$0M
Derivative Transaction Direct Ownership 10b5-1 Detected
—01/03/202512/30/2024
IRONQuisel John D
CEO
exercise10b5-110.0k$1.01MM
Direct Ownership 10b5-1 Detected
—01/03/202512/31/2024
IRONQuisel John D
CEO
sale10b5-11.90k-$11.8MS
Direct Ownership Repeat Seller 10b5-1 Detected
—01/03/202512/30/2024
IRONQuisel John D
CEO
sale10b5-111.1k-$68.7MS
Direct Ownership 10b5-1 Detected
—01/03/202512/30/2024
IRONQuisel John D
CEO
exercise10b5-113.0k$12.8MM
Direct Ownership 10b5-1 Detected
—01/03/202512/30/2024
IRONQuisel John D
CEO
exercise2.70k$0M
Derivative Transaction Direct Ownership
—01/03/202412/29/2023
IRONQuisel John D
CEO
exercise2.70k$272kM
Direct Ownership Large Holdings Increase
—01/03/202412/29/2023

Quisel John D Insider Activity FAQ

SEC Form 4 context

Who is Quisel John D?

Quisel John D is a reporting owner in SEC Form 4 filings with reporting owner CIK 0001586788.

Which companies has Quisel John D reported transactions for?

Disc Medicine, Inc., Gossamer Bio, Inc.

When was Quisel John D's latest insider buy?

No open-market insider purchase is available for this period.

When was Quisel John D's latest insider sale?

sale at Disc Medicine, Inc. on Aug 17, 2026 valued at $949,162.

Where can I see the original SEC filings?

Each transaction row links directly to the source SEC filing so the reported Form 4 details can be reviewed.

Are performance metrics included?

This version does not calculate win rates, forward returns, benchmark-adjusted returns, or high-conviction scores.