undamentalytics Newsletter

Donaldson Co Inc insider trading

Every open-market purchase and sale by Donaldson Co Inc's officers, directors and largest shareholders since November 4, 2021, and what the share price did next.

Insider purchase Insider sale Marker size reflects trade value. Weekly closes adjusted for splits; may be delayed.
Donaldson Co Inc insider open-market trades
DateInsiderTrade SharesPriceValue 1M after 3M after 6M after

From insiders' Form 4 filings with the SEC: open-market purchases and sales only (awards, option exercises and shares withheld for tax are excluded), combined to one line per insider per day. "Plan" marks trades the filing says were made under a pre-set Rule 10b5-1 trading plan, which are scheduled in advance. Price changes run from the close on the trade date; hover a figure for the change relative to the S&P 500. Past moves don't predict future ones.

Does following Donaldson Co Inc’s insiders pay?

From March 12, 2010 to September 10, 2026, 36 insiders reported 6 open-market purchases and 148 sales not made under a pre-set plan in Donaldson Co Inc. Twelve months after each purchase was reported, the shares were −1.3% against the S&P 500 on average (median −7.0%), over 6 purchases with a full year of prices; 33% beat the index. After sales, the shares moved −2.8% against the index over 12 months (a negative figure means selling was the right call). That rests on fewer than 20 purchases, too few to read much into. Buying each purchase the day after it was reported, an equal amount each, held 12 months or until that insider reported a sale, would have turned $10,000 on June 28, 2012 into $17,332 by November 2, 2026, +3.9% a year. It held shares 37% of the time; the S&P 500 on those same days, with Treasury bills otherwise, made $19,228 (+4.7% a year), and held throughout $72,810 (+14.9%).

$0$25.0k$50.0k$75.0k 20122014201620182020202220242026 $72.8k$19.2k$17.3k
Copying Donaldson Co Inc's insidersS&P 500, same days investedS&P 500, held throughout $10,000 copying every open-market purchase by Donaldson Co Inc's insiders from June 28, 2012, before costs and taxes, marked weekly. Uninvested money earns the Treasury bill rate; the portfolio held shares 37% of the time.
Donaldson Co Inc: each insider's record
InsiderRolePurchases12 months after their purchasesBeat the S&P 500Sales12 months after their salesLatest report
Oberton Willard D Director 0 — — 19 −7.4% (19) June 5, 2025
Carpenter Tod E. Chairman, President and CEO 0 — — 12 −8.3% (10) September 10, 2026
Scalf Thomas R President 0 — — 12 −4.4% (12) March 18, 2025
Rajendra Ajita G Director 0 — — 8 −9.1% (7) December 8, 2025
Wiehoff John Director 0 — — 8 −4.0% (8) June 23, 2021
Perushek Mary Lynne Vice President 0 — — 7 +3.6% (7) March 3, 2016
Ward Jay L Senior Vice President 0 — — 7 +2.3% (7) December 4, 2015
Becker Amy C Chief Legal Officer 0 — — 6 −11.8% (6) September 2, 2025
Eugster Jack W Director 0 — — 6 +1.6% (6) August 30, 2012
Hoffman Michael J Director 0 — — 5 +5.8% (5) June 4, 2021
Miller Paul David Director 0 — — 5 +1.4% (5) December 1, 2015
Owens James Director 0 — — 5 −6.8% (4) April 14, 2026
Robinson Scott J. Chief Financial Officer 0 — — 5 −10.2% (5) September 30, 2024
Vermeersch Wim Vice President 1 −10.8% (1) 0% 4 −8.6% (4) October 3, 2022
Grundhofer John F Director 0 — — 4 −6.5% (4) September 20, 2012
Joppa Sandra N Vice President 0 — — 4 −12.2% (4) January 7, 2015
Milroy Douglas A. Director 3 +8.0% (3) 67% 1 −13.0% (1) August 31, 2023
Briseno Guillermo President 0 — — 3 −9.4% (2) March 27, 2026
Osland Melissa A. Controller 0 — — 3 +13.3% (3) December 15, 2017
Verhage Thomas R Vice President 0 — — 3 +15.7% (3) December 14, 2010
Dahlgren Andrew C President 0 — — 2 −9.6% (2) September 2, 2025
Dolan Janet M Director 0 — — 2 +18.4% (2) November 23, 2010
Linnell Norman C Vice President 0 — — 2 +21.9% (2) October 15, 2010
Noddle Jeffrey Director 0 — — 2 +2.9% (2) March 1, 2012
Rautio Trudy A. Director 0 — — 2 +8.8% (2) September 2, 2025
Spethmann Jeffrey E Senior Vice President 1 −13.3% (1) 0% 1 −6.1% (1) March 10, 2020
Timm David W Vice President 0 — — 2 +1.3% (2) January 12, 2012
Cook William M Chairman, President and CEO 0 — — 1 +20.2% (1) April 6, 2010
Hilger Christopher M. Director 1 −7.3% (1) 0% 0 — April 12, 2023
Keller Peter Joseph Corporate Controller 0 — — 1 +19.7% (1) December 30, 2021
Kramer Sheila G. Chief Human Resources Officer 0 — — 1 −17.7% (1) March 18, 2024
Lewis Richard Brent Vice President 0 — — 1 −14.8% (1) September 17, 2018
Mcmurray Charles J Senior Vice President 0 — — 1 −9.4% (1) September 10, 2013
Pogalz Bradley J. Chief Financial Officer 0 — — 1 — December 10, 2025
Schwab Lowell F Senior Vice President 0 — — 1 +19.0% (1) April 14, 2010
Shaw James F Vice President 0 — — 1 −3.5% (1) December 3, 2012

Moves are the shares’ return including dividends minus the S&P 500’s, from the close on the first trading day after each report; the number of trades with a finished 12-month window is in brackets. Green means the trade went the insider’s way (a purchase ahead of the index, a sale followed by the shares trailing it). A trade reported both by a director or officer and by a fund or company they are linked to counts once here, under the person. Purchases count only where the share price actually traded was at least $5. These figures describe what the shares did, not why anyone traded. Insiders across all companies.

When several insiders traded Donaldson Co Inc

Months when 2 or more insiders became net buyers, or 3 or more net sellers, of Donaldson Co Inc in reports dated in the 91 days before the month end, and how the stock did against the S&P 500 from that month end. After 19 selling crowds, −2.2%. One company's history is too short to judge by; the test across every company is the better guide.

MonthCrowd3 months on, vs S&P 5006 months12 months
September 30, 20255 selling+7.2%+6.8%−7.3%
March 31, 20253 selling−4.9%+3.3%+11.7%
September 30, 20244 selling−11.2%−5.6%−4.0%
December 29, 20233 selling+3.9%−7.0%−20.3%
September 29, 20233 selling−1.6%+2.5%−10.2%
October 31, 20223 selling+3.5%+7.0%−8.9%
December 31, 20213 selling−6.0%+1.4%+19.7%
June 30, 20213 selling−7.6%−18.5%−12.4%
March 31, 20203 selling+0.8%−8.9%−3.3%
September 28, 20183 selling−11.7%−10.4%−14.5%
December 31, 20154 selling+8.3%+17.5%+37.7%
January 30, 20154 selling−2.5%−13.8%−20.6%

Colours show whether the crowd was right: green when buyers were followed by a rise above the index, or sellers by a fall below it. Latest 12 of 19. Total returns from the month end; past patterns are not a forecast.

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