SEC ownership of Epizyme, Inc.

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001571498.

Comparable stake leader

Royalty Pharma Investments 2019 ICAV

Disclosed value leader

Royalty Pharma Investments 2019 ICAV

Comparable rows

0/4

Latest evidence

12 Aug 2022

Ownership snapshot CIK-linked ownership evidence from parsed SEC filings. 1 signal
Latest parsed ownership date
12 Aug 2022
Freshness: Most recent filing date in this holder set
Issuer Names, identifiers, and filing context for this profile. 2 identity fields
Issuer CIK
0001571498
Issuer location
Cambridge, MA

Ownership snapshot

Top shareholders of Epizyme, Inc. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
Royalty Pharma Investment...
Disclosed value leader
Royalty Pharma Investment...
Comparable rows
0/4
Latest evidence
12 Aug 2022
3/4/5 Highest disclosed value: $31,960,000 4 rows are not safely comparable across share classes.

Quick read

Royalty Pharma Investments 2019 ICAV has the largest disclosed position value at $31.96M.

0 of 4 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Royalty Pharma Investments 2019 ICAV's linked filing trail.
Disclosed position value Top 3
Royalty Pharma Investments 2019 ICAV $31.96M
Matthew Ros $157K
Andrew R. Allen $29K

Value bars compare disclosed positions; verify each figure against the linked filing evidence.

Detailed SEC evidence table Showing 1-4 of 4 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
Royalty Pharma Investments 2019 ICAV
3/4/5
Director, 10%+ Owner
class O/S missing
$31,960,000
22,666,667 shares
31 Jan 2022
Matthew Ros
3/4/5
Executive Vice President, Chief Strategy & Business Officer
mixed-class rows
$156,951
245,491 shares
mixed-class rows
16 Aug 2021
Andrew R. Allen
3/4/5
Director
mixed-class rows
$28,990
61,119 shares
mixed-class rows
11 Jun 2021
Jerald Korn
3/4/5
Chief Operating Officer
class O/S missing
800,000 shares
12 Aug 2022
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 05 Sep 2025.

Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value Sell value
Shares: 0 Shares: 0
Window (months) Buy shares Sell shares Buy value Sell value Net value
0-3 0 0 $0 $0 $0
3-6 0 0 $0 $0 $0
6-9 0 0 $0 $0 $0
9-12 0 0 $0 $0 $0

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-17 of 17 reporting-owner rows connected to Epizyme, Inc.. Open a relationship link for the CIK-to-CIK filing trail.

Rows
17
Largest Forms 3/4/5 holder
Royalty Pharma Investments 2019 ICAV
Net 12M change
$0
Latest report
12 Aug 2022
Name Relationship Holdings Value Past Year Net Change Change % Valuation Report Date
Royalty Pharma Investments 2019 ICAV Director, 10%+ Owner $31,960,000 Mixed 31 Jan 2022
Matthew Ros Executive Vice President, Chief Strategy & Business Officer $156,951 Mixed 16 Aug 2021
Andrew R. Allen Director $28,990 Mixed 11 Jun 2021
Conroy Kevin T. Director Mixed 12 Aug 2022
Shefali Agarwal Consultant and Named Executive Officer Mixed 12 Aug 2022
Pablo G. Legorreta Director, 10%+ Owner Mixed 12 Aug 2022
Grant C. Bogle President and CEO, Director Mixed 12 Aug 2022
Michael F. Giordano Director Mixed 12 Aug 2022
Jerald Korn Chief Operating Officer Mixed 12 Aug 2022
Joseph Beaulieu Senior Vice President, Finance and Corporate Controller Mixed 12 Aug 2022
Jeffery Kutok Chief Scientific Officer Mixed 12 Aug 2022
Carol Stuckley Director Mixed 12 Aug 2022
Roy A. Beveridge Director Mixed 12 Aug 2022
Kenneth Bate Director Mixed 12 Aug 2022
Victoria Richon Director Mixed 12 Aug 2022
David M. Mott Director Mixed 12 Aug 2022
Carl Goldfischer Director Mixed 12 Aug 2022

Recent insider transactions for Epizyme, Inc.

Showing up to 300 recent insider transactions from the last 12 months.

Insider Symbol Class Transaction % SEC-reported value SEC-reported price Shares Shares owned Date Ownership
No insider transactions were found in the last 12 months for this issuer.
* marks a reported price that did not pass the local price check.
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