Comparable stake leader
BlackRock, Inc.
SEC ownership of WD 40 CO
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000105132.
Disclosed value leader
BlackRock, Inc.
Comparable rows
4/50
Latest evidence
26 Oct 2026
- Public ticker
- WDFC on Nasdaq
- Parsed ownership sources
-
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
4 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
26 Oct 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000105132
- Issuer location
- San Diego, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of WD 40 CO (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
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
4/50
Latest evidence
26 Oct 2026
13F
13D/G
3/4/5
Lead comparable stake: 14%
46 rows are not safely comparable across share classes.
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 14%.
4 of 50 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 BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 4
BlackRock, Inc.
14%
VANGUARD PORTFOLIO MANAGEMENT LLC
7.8%
VANGUARD CAPITAL MANAGEMENT LLC
5.3%
APG Asset Management US Inc.
2.4%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
14%
Reported 13D/G
· 30 Sep 2025
|
$505,734,060
2,075,743 shares
|
— | 30 Jun 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13F
13D/G
Company · Vanguard Portfolio Management
|
7.8%
Reported 13D/G
· 31 Mar 2026
|
$262,139,342
1,075,929 shares
|
— | 30 Jun 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
13D/G
Company · Vanguard Capital Management
|
5.3%
Reported 13D/G
· 31 Mar 2026
|
$147,270,634
604,460 shares
|
— | 30 Jun 2026 |
| APG Asset Management US Inc. |
13D/G
|
2.4%
Reported 13D/G
· 31 Mar 2025
|
$72,372,773
324,004 shares
|
-$155,525,607 | 31 Mar 2025 |
| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC |
13F
Company
|
—
denominator unverified
|
$153,254,837
629,021 shares
|
— | 30 Jun 2026 |
| STATE STREET CORP |
13F
Company
|
—
denominator unverified
|
$133,806,844
549,199 shares
|
— | 30 Jun 2026 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
—
denominator unverified
|
$107,558,833
441,406 shares
|
— | 30 Jun 2026 |
| FIRST TRUST ADVISORS LP |
13F
Company
|
—
denominator unverified
|
$84,913,172
348,519 shares
|
— | 30 Jun 2026 |
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
Net insider flow leans to selling over the last 12 months. Net value: -$12,271.
Buys
$104,792
Insiders: 1
Sells
$117,063
Insiders: 1
Net
-$12,271
Shares: -76
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 424
Shares: 500
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 500 | $0 | $117,063 | -$117,063 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 424 | 0 | $104,792 | $0 | +$104,792 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 26 reporting-owner rows connected to WD 40 CO. Open a relationship link for the CIK-to-CIK filing trail.
Rows
26
Largest Forms 3/4/5 holder
Garry O Ridge
Net 12M change
-$12.27K
Full value: -$12,271 · USD · 12-month changeLatest report
02 Nov 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Garry O Ridge | Director, Chairman of the Board | $15,438,200 | Mixed | 24 Oct 2022 | ||
| Jay Rembolt | VP, Finance, Treasurer & CFO | $8,825,200 | Mixed | 24 Oct 2022 | ||
| Steven A. Brass | CEO and President, Director | $8,183,226 | Median | 26 Oct 2026 | ||
| Gregory A. Sandfort | Director | $3,895,800 | Mixed | 12 Dec 2023 | ||
| Eric Etchart | Director | $1,850,915 | Mixed | 12 Dec 2025 | ||
| David Pendarvis | Director | $1,704,840 | +$104,792 | +6.5% | Filing P/S | 05 Feb 2026 |
| Patricia Q. Olsem | Division President, Americas | $1,658,175 | -$117,063 | -6.6% | Median | 26 Oct 2026 |
| William B. Noble | Group Managing Director | $1,599,967 | Mixed | 27 Oct 2025 | ||
| Daniel T. Carter | Director | $1,547,609 | Mixed | 12 Dec 2025 | ||
| Sara K. Hyzer | VP, Finance & CFO | $1,457,618 | Median | 26 Oct 2026 | ||
| Melissa Claassen | Director | $1,348,200 | Mixed | 13 Dec 2022 | ||
| Richard T. Clampitt | VP, General Counsel | $1,346,800 | Mixed | 20 Oct 2021 | ||
| Geoffrey Holdsworth | Managing Director, Asia-Pac. | $1,212,200 | Mixed | 24 Oct 2022 | ||
| Trevor I. Mihalik | Director | $1,212,105 | Mixed | 12 Dec 2024 | ||
| Keith Stauffer | Chief Financial Officer | $1,188,594 | Median | 02 Nov 2026 | ||
| Jeffrey G. Lindeman | VP, Chief People, Cult. & Cap. | $1,140,929 | Median | 26 Oct 2026 | ||
| Christophe P. Cloez | Managing Director, EIMEA | $1,134,466 | Median | 26 Oct 2026 | ||
| Phenix Q. Kiamilev | VP, GC & Chief Compliance Ofcr | $1,033,481 | Median | 26 Oct 2026 | ||
| Anne Saunders | Director | $665,806 | Mixed | 12 Dec 2025 | ||
| Graciela Monteagudo | Director | $568,796 | Mixed | 12 Dec 2025 |
Recent insider transactions for WD 40 CO
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Patricia Q. Olsem | WDFC | Common Stock | Tax liability | -5.9% | -332 | 5,296 | 26 Oct 2026 | Direct | ||
| Steven A. Brass | WDFC | Common Stock | Tax liability | -7.11% | -3,101 | 40,517 | 26 Oct 2026 | Direct | ||
| Phenix Q. Kiamilev | WDFC | Common Stock | Tax liability | -5.42% | -293 | 5,117 | 26 Oct 2026 | By Trust | ||
| Jeffrey G. Lindeman | WDFC | Common Stock | Tax liability | -4.55% | -269 | 5,649 | 26 Oct 2026 | Direct | ||
| Christophe P. Cloez | WDFC | Common Stock | Tax liability | -3.16% | -183 | 5,617 | 26 Oct 2026 | Direct | ||
| Sara K. Hyzer | WDFC | Common Stock | Tax liability | -8.76% | -693 | 7,217 | 26 Oct 2026 | Direct | ||
| Nicholas D. Giordano | WDFC | Common Stock | Tax liability | -5.7% | -34 | 563 | 26 Oct 2026 | Direct | ||
| Nicholas D. Giordano | WDFC | Common Stock | Award | 75.6% | 257 | 597 | 08 Oct 2026 | Direct | ||
| Steven A. Brass | WDFC | Common Stock | Award | 31.5% | 9,808 | 40,971 | 08 Oct 2026 | Direct | ||
| Christophe P. Cloez | WDFC | Common Stock | Award | 24.6% | 1,103 | 5,588 | 08 Oct 2026 | Direct | ||
| Patricia Q. Olsem | WDFC | Common Stock | Award | 23% | 1,054 | 5,628 | 08 Oct 2026 | Direct | ||
| Sara K. Hyzer | WDFC | Common Stock | Award | 33% | 1,961 | 7,910 | 08 Oct 2026 | Direct | ||
| Jeffrey G. Lindeman | WDFC | Common Stock | Award | 21.7% | 1,005 | 5,631 | 08 Oct 2026 | Direct | ||
| Phenix Q. Kiamilev | WDFC | Common Stock | Award | 25.6% | 1,103 | 5,410 | 08 Oct 2026 | By Trust | ||
| Patricia Q. Olsem | WDFC | Common Stock | Sale | -4.19% | -$46,944 | $234.72 | -200 | 4,574 | 13 Aug 2026 | Direct |
| Patricia Q. Olsem | WDFC | Common Stock | Sale | -5.91% | -$70,119 | $233.73 | -300 | 4,774 | 10 Aug 2026 | Direct |
| Ken Allen Plunk | WDFC | Common Stock | Award | 515 | 515 | 18 Feb 2026 | Direct | |||
| David Pendarvis | WDFC | Common Stock | Purchase | 6.55% | $104,792 | $247.15 | 424 | 6,898 | 05 Feb 2026 | Direct |
| Edward O Magee Jr. | WDFC | Common Stock | Award | 30.6% | 612 | 2,613 | 12 Dec 2025 | Direct | ||
| Eric Etchart | WDFC | Common Stock | Award | 11.7% | 979 | 9,349 | 12 Dec 2025 | Direct | ||
| Daniel T. Carter | WDFC | Common Stock | Award | 8.49% | 612 | 7,817 | 12 Dec 2025 | Direct | ||
| David Pendarvis | WDFC | Common Stock | Award | 10.4% | 612 | 6,474 | 12 Dec 2025 | Direct | ||
| Lara L. Lee | WDFC | Common Stock | Award | 32.4% | 612 | 2,503 | 12 Dec 2025 | Direct | ||
| Anne Saunders | WDFC | Common Stock | Award | 22.2% | 612 | 3,363 | 12 Dec 2025 | Direct | ||
| Graciela Monteagudo | WDFC | Common Stock | Award | 27.1% | 612 | 2,873 | 12 Dec 2025 | Direct | ||
| Cynthia Burks | WDFC | Common Stock | Award | 47.4% | 612 | 1,903 | 12 Dec 2025 | Direct |
* marks a reported price that did not pass the local price check.