Comparable stake leader
Ali Tehrani
SEC ownership of Zymeworks BC Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001403752.
Disclosed value leader
Ali Tehrani
Comparable rows
0/16
Latest evidence
10 Nov 2022
- Parsed ownership sources
- 3/4/5
- Largest SEC-reported holder
- Ali Tehrani
- Latest parsed ownership date
- 10 Nov 2022
- Issuer CIK
- 0001403752
- Issuer location
- Vancouver, British Columbia, Canada
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 Zymeworks BC 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
Ali Tehrani
Disclosed value leader
Ali Tehrani
Comparable rows
0/16
Latest evidence
10 Nov 2022
3/4/5
Highest disclosed value: $1,424,421
16 rows are not safely comparable across share classes.
Showing 1-8 of 16 holder rows.
Quick read
Ali Tehrani has the largest disclosed position value at $1.42M.
0 of 16 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 Ali Tehrani's linked filing trail.
Disclosed position value
Top 5
Ali Tehrani
$1.42M
Anthony J. Polverino
$164.2K
Mr. Neil Klompas
$69.9K
Neil Josephson
$65.2K
Kathryn O'Driscoll
$28.6K
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-8 of 16 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Ali Tehrani |
3/4/5
Chief Executive Officer, Director
|
—
class O/S missing
|
$1,424,421
315,836 shares
|
— | 15 Jul 2021 |
| Anthony J. Polverino |
3/4/5
Chief Scientific Officer
|
—
class O/S missing
|
$164,196
36,407 shares
|
— | 07 Jan 2022 |
| Mr. Neil Klompas |
3/4/5
Chief Operating Officer
|
—
class O/S missing
|
$69,910
15,501 shares
|
— | 05 Jul 2022 |
| Neil Josephson |
3/4/5
Chief Medical Officer
|
—
mixed-class rows
|
$65,165
26,221 shares
mixed-class rows
|
— | 10 Nov 2022 |
| Kathryn O'Driscoll |
3/4/5
Chief People Officer
|
—
class O/S missing
|
$28,639
6,350 shares
|
— | 06 Jul 2021 |
| James Priour |
3/4/5
Chief Commercial Officer
|
—
class O/S missing
|
$11,334
2,513 shares
|
— | 06 Jul 2021 |
| Kenneth Galbraith |
3/4/5
Chair, President & CEO, Director
|
—
class O/S missing
|
—
500,000 shares
|
— | 15 Jan 2022 |
| Paul Andrew Moore |
3/4/5
Chief Scientific Officer
|
—
class O/S missing
|
—
200,000 shares
|
— | 18 Jul 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 06 Jun 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 Zymeworks BC Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
16
Largest Forms 3/4/5 holder
Ali Tehrani
Net 12M change
$0
Latest report
10 Nov 2022
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Ali Tehrani | Chief Executive Officer, Director | $1,424,421 | Mixed | 15 Jul 2021 | ||
| Anthony J. Polverino | Chief Scientific Officer | $164,196 | Mixed | 07 Jan 2022 | ||
| Mr. Neil Klompas | Chief Operating Officer | $69,910 | Mixed | 05 Jul 2022 | ||
| Neil Josephson | Chief Medical Officer | $65,165 | Mixed | 10 Nov 2022 | ||
| Kathryn O'Driscoll | Chief People Officer | $28,639 | Mixed | 06 Jul 2021 | ||
| James Priour | Chief Commercial Officer | $11,334 | Mixed | 06 Jul 2021 | ||
| Kelvin Neu | Director | Mixed | 06 May 2021 | |||
| Troy Cox | Director | Mixed | 06 May 2021 | |||
| Kenneth Galbraith | Chair, President & CEO, Director | Mixed | 15 Jan 2022 | |||
| Kenneth J. Hillan | Director | Mixed | 06 May 2021 | |||
| Christopher Astle | SVP & Chief Financial Officer | Mixed | 10 Mar 2022 | |||
| Paul Andrew Moore | Chief Scientific Officer | Mixed | 18 Jul 2022 | |||
| Lota S. Zoth | Director | Mixed | 06 May 2021 | |||
| Susan Mahony | Director | Mixed | 06 May 2021 | |||
| Hollings Renton | Director | Mixed | 06 May 2021 | |||
| Natalie Sacks | Director | Mixed | 06 May 2021 |
Recent insider transactions for Zymeworks BC 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.