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
50/50
Latest evidence
29 Jun 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
-
50 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
-
29 Jun 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
50/50
Latest evidence
29 Jun 2026
13F
13D/G
3/4/5
Lead comparable stake: 14%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 14%.
50 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 5
BlackRock, Inc.
14%
VANGUARD PORTFOLIO MANAGEMENT LLC
7.8%
VANGUARD CAPITAL MANAGEMENT LLC
5.3%
APG Asset Management US Inc.
2.4%
Steven A. Brass
0.25%
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%
from 13D/G
|
$411,953,615
2,019,975 shares
|
— | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
7.8%
|
$214,131,506
1,049,971 shares
|
$0 | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
5.3%
|
$144,689,596
709,470 shares
|
$0 | 31 Mar 2026 |
| APG Asset Management US Inc. |
13D/G
|
2.4%
|
$72,372,773
324,004 shares
|
-$155,525,607 | 31 Mar 2025 |
| Steven A. Brass |
3/4/5
President and CEO, Director
|
0.25%
|
$6,767,730
33,761 shares
|
+$72,567 | 28 Oct 2025 |
| Eric Etchart |
3/4/5
Director
|
0.07%
|
$1,850,915
9,349 shares
|
+$97,010 | 12 Dec 2025 |
| William B. Noble |
3/4/5
Group Managing Director
|
0.06%
|
$1,599,967
8,097 shares
|
— | 27 Oct 2025 |
| Patricia Q. Olsem |
3/4/5
Division President, Americas
|
0.06%
|
$1,578,428
7,988 shares
|
— | 27 Oct 2025 |
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 buying over the last 12 months. Net value: +$627,557.
Buys
$627,557
Insiders: 6
Sells
$0
Insiders: 0
Net
+$627,557
Shares: +3,064
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 3,064
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 | 424 | 0 | $104,792 | $0 | +$104,792 |
| 9-12 | 2,640 | 0 | $522,765 | $0 | +$522,765 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 25 reporting-owner rows connected to WD 40 CO. Open a relationship link for the CIK-to-CIK filing trail.
Rows
25
Largest Forms 3/4/5 holder
Garry O Ridge
Net 12M change
+$627,557
Latest report
29 Jun 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 | President and CEO, Director | $6,767,730 | +$72,567 | +1.1% | Filing P/S | 28 Oct 2025 |
| Gregory A. Sandfort | Director | $3,895,800 | Mixed | 12 Dec 2023 | ||
| Eric Etchart | Director | $1,850,915 | +$97,010 | +5.5% | Mixed | 12 Dec 2025 |
| David Pendarvis | Director | $1,704,840 | +$207,493 | +14% | Filing P/S | 05 Feb 2026 |
| William B. Noble | Group Managing Director | $1,599,967 | Mixed | 27 Oct 2025 | ||
| Patricia Q. Olsem | Division President, Americas | $1,578,428 | Mixed | 27 Oct 2025 | ||
| Daniel T. Carter | Director | $1,547,609 | +$199,370 | +15% | Mixed | 12 Dec 2025 |
| 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 | ||
| Sara K. Hyzer | VP, Finance & CFO | $1,189,730 | +$40,092 | +3.5% | Filing P/S | 28 Oct 2025 |
| Jeffrey G. Lindeman | VP, Chief People, Cult. & Cap. | $968,240 | Mixed | 27 Oct 2025 | ||
| Christophe Paul Cloez | Managing Director, EIMEA | $961,834 | Mixed | 06 Apr 2026 | ||
| Phenix Q. Kiamilev | VP, GC & Chief Compliance Ofcr | $862,579 | +$11,025 | +1.3% | Filing P/S | 28 Oct 2025 |
| Anne Saunders | Director | $665,806 | Mixed | 12 Dec 2025 | ||
| Graciela Monteagudo | Director | $568,796 | Mixed | 12 Dec 2025 | ||
| Edward O Magee Jr. | Director | $517,321 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | ||
| Eric Etchart | WDFC | Common Stock | Purchase | 6.35% | $97,010 | $194.02 | 500 | 8,370 | 30 Oct 2025 | Direct |
| David Pendarvis | WDFC | Common Stock | Purchase | 9.8% | $102,702 | $196.37 | 523 | 5,862 | 30 Oct 2025 | Direct |
| Phenix Q. Kiamilev | WDFC | Common Stock | Purchase | 1.29% | $11,025 | $200.46 | 55 | 4,303 | 28 Oct 2025 | By Trust |
| Steven A. Brass | WDFC | Common Stock | Purchase | 1.08% | $72,567 | $200.46 | 362 | 33,761 | 28 Oct 2025 | Direct |
| Sara K. Hyzer | WDFC | Common Stock | Purchase | 3.49% | $40,092 | $200.46 | 200 | 5,935 | 28 Oct 2025 | Direct |
| Patricia Q. Olsem | WDFC | Common Stock | Tax liability | -12.7% | -736 | 5,074 | 27 Oct 2025 | Direct | ||
| William B. Noble | WDFC | Common Stock | Tax liability | -6.9% | -574 | 7,741 | 27 Oct 2025 | Direct | ||
| Jeffrey G. Lindeman | WDFC | Common Stock | Tax liability | -10.2% | -554 | 4,900 | 27 Oct 2025 | Direct | ||
| Phenix Q. Kiamilev | WDFC | Commont Stock | Tax liability | -6.47% | -294 | 4,248 | 27 Oct 2025 | By Trust | ||
| Phenix Q. Kiamilev | WDFC | Common Stock | Tax liability | -5.55% | -267 | 4,542 | 27 Oct 2025 | By Trust | ||
| Sara K. Hyzer | WDFC | Common Stock | Tax liability | -14.7% | -988 | 5,735 | 27 Oct 2025 | Direct | ||
| Steven A. Brass | WDFC | Common Stock | Tax liability | -11.5% | -4,352 | 33,399 | 27 Oct 2025 | Direct | ||
| Daniel T. Carter | WDFC | Common Stock | Purchase | 16.1% | $199,370 | $199.37 | 1,000 | 7,205 | 27 Oct 2025 | Direct |
| Patricia Q. Olsem | WDFC | Common Stock | Award | 161.6% | 2,131 | 3,450 | 09 Oct 2025 | Direct | ||
| Jeffrey G. Lindeman | WDFC | Common Stock | Award | 43.9% | 1,664 | 5,454 | 09 Oct 2025 | Direct | ||
| Phenix Q. Kiamilev | WDFC | Common Stock | Award | 59.4% | 1,793 | 4,809 | 09 Oct 2025 | By Trust | ||
| Sara K. Hyzer | WDFC | Common Stock | Award | 64.9% | 2,646 | 6,723 | 09 Oct 2025 | Direct | ||
| Steven A. Brass | WDFC | Common Stock | Award | 44.7% | 11,666 | 37,751 | 09 Oct 2025 | Direct |
* marks a reported price that did not pass the local price check.