Comparable stake leader
Clay B. Siegall
SEC ownership of Seagen Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001060736.
Disclosed value leader
Clay B. Siegall
Comparable rows
0/2
Latest evidence
12 May 2022
- Parsed ownership sources
-
3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Clay B. Siegall
Ranking: Comparable ownership first, then disclosed value
- Latest parsed ownership date
-
12 May 2022
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001060736
- Issuer location
- Bothell, WA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
1 signal
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Seagen 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
Clay B. Siegall
Disclosed value leader
Clay B. Siegall
Comparable rows
0/2
Latest evidence
12 May 2022
3/4/5
Highest disclosed value: $152,527,740
2 rows are not safely comparable across share classes.
Quick read
Clay B. Siegall has the largest disclosed position value at $152.53M.
0 of 2 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 Clay B. Siegall's linked filing trail.
Disclosed position value
Top 2
Clay B. Siegall
$152.53M
Marc E. Lippman
$12.31M
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-2 of 2 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Clay B. Siegall |
3/4/5
President & CEO, Director
|
—
mixed-class rows
|
$152,527,740
717,189 shares
mixed-class rows
|
— | 12 May 2022 |
| Marc E. Lippman |
3/4/5
Director
|
—
mixed-class rows
|
$12,306,460
57,202 shares
mixed-class rows
|
— | 14 May 2021 |
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 08 Aug 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 1-16 of 16 reporting-owner rows connected to Seagen Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
16
Largest Forms 3/4/5 holder
Clay B. Siegall
Net 12M change
$0
Latest report
14 Dec 2023
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Clay B. Siegall | President & CEO, Director | $152,527,740 | Mixed | 12 May 2022 | ||
| Marc E. Lippman | Director | $12,306,460 | Mixed | 14 May 2021 | ||
| David R. Epstein | CEO, Director | Mixed | 14 Dec 2023 | |||
| Daniel G. Welch | Director | Mixed | 14 Dec 2023 | |||
| Nancy A. Simonian | Director | Mixed | 14 Dec 2023 | |||
| Charles R. Romp | EVP, Commercial U.S. | Mixed | 14 Dec 2023 | |||
| Todd E. Simpson | Chief Financial Officer | Mixed | 14 Dec 2023 | |||
| Vaughn B. Himes | Chief Technical Officer | Mixed | 14 Dec 2023 | |||
| Roger D. Dansey | President, R&D & CMO | Mixed | 14 Dec 2023 | |||
| Jean I. Liu | Chief Legal Officer | Mixed | 14 Dec 2023 | |||
| David W. Gryska | Director | Mixed | 14 Dec 2023 | |||
| Alpna Seth | Director | Mixed | 14 Dec 2023 | |||
| John A. Orwin | Director | Mixed | 14 Dec 2023 | |||
| BAKER BROS. ADVISORS LP | Director, Former 10% Owner | Mixed | 14 Dec 2023 | |||
| Ted W. Love | Director | Mixed | 14 Dec 2023 | |||
| Sandra M. Swain | Director | Mixed | 14 Dec 2023 |
Recent insider transactions for Seagen 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.