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TENNANT CO

TNC Net selling
CIK 0000097134 #2436 in the set updated 17 Sep 2026
Bought (120 mo)
$1.90M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$47.05M
$0.00 on a plan · $40.40M straight out of an exercise
Sold at will
$6.65M
23 of 124 sales
Net
−$45.15M
−$4.75M against sales at will

By person

32 insiders · 140 transactions
9.5×

David W. Huml holds 9.5 times base salary in stock. $9.45M of shares against $992.39K in salary for 2025.

Salary from the company's own proxy. The shares are what David W. Huml last reported holding, valued at $68.18, the price Common Stock was last bought or sold at on the open market here, on 12 Aug 2026.

Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
KILLINGSTAD CHRIS
Director
—
$20.65M (42) scheduled
−$20.65M
163,856
0.9611%
$11.17M
+13.3%
Zay Richard H.
SVP, COO
—
$6.78M (19) scheduled
−$6.78M
30,225
0.1773%
$2.06M
+125.6%
PAULSON THOMAS
SVP, CFO
—
$5.19M (10) scheduled
−$5.19M
32,692
0.1918%
$2.23M
−8.4%
Huml David W.
PRESIDENT AND CEO
$257.56K (3)
$4.70M (12) scheduled
−$4.44M
138,559
0.8127%
$9.45M
+4,279%
McKnight Carol E.
FORMER, SVP, CHIEF ADMIN OFFR
—
$2.37M (5) scheduled
−$2.37M
21,760
0.1276%
$1.48M
+385.5%
Sonnenberg Steven Alan
Director
—
$2.15M (7) scheduled
−$2.15M
22,994
0.1349%
$1.57M
+78.8%
Windley David
Director
—
$1.06M (2)
−$1.06M
8,912
0.0523%
$607.62K
+713.1%
EICHER CAROL S
Director
—
$968.98K (8) scheduled
−$968.98K
30,326
0.1779%
$2.07M
+253.5%
Arvani Azita
Director
—
$873.87K (5) scheduled
−$873.87K
18,925
0.1110%
$1.29M
+369.8%
Glerum James T Jr.
Director
$499.98K (1)
—
+$499.98K
10,090
0.0592%
$687.94K
—
Wilson Heidi M
SVP, General Counsel and Sec'y
—
$414.84K (1) scheduled
−$414.84K
22,939
0.1345%
$1.56M
+7.2%
Balinski Barb
SVP, Chief Transf Officer
—
$293.29K (2)
−$293.29K
19,218
0.1127%
$1.31M
+1,247%
ERICKSON KRISTIN A.
SVP, CHRO & GC
—
$279.59K (3) scheduled
−$279.59K
25,176
0.1477%
$1.72M
+1,977%
WICHMANN DAVID S
Director
—
$233.01K (2) scheduled
−$233.01K
14,722
0.0863%
$1.00M
+108.2%
Morse Timothy R.
Director
$102.27K (1)
—
+$102.27K
10,614
0.0623%
$723.66K
—
Mulligan Donal L
Director
$1.04M (3)
$1.10M (6) scheduled
−$57.11K
38,175
0.2239%
$2.60M
+480.3%
West Fay
SENIOR VP, CFO
—
—
—
48,253
0.2830%
$3.29M
—
SHANK STEPHEN G
Director
—
—
—
36,810
0.2159%
$2.51M
+5.7%
Austen William F.
Director
—
—
—
26,944
0.1580%
$1.84M
+105.3%
Schottler Patrick W.
SVP, Robotics
—
—
—
13,857
0.0813%
$944.77K
+366.9%
GREEN MARIA C
Director
—
—
—
12,709
0.0745%
$866.50K
—
Woodward Keith Alan
Senior VP, CFO
—
—
—
12,624
0.0740%
$860.70K
—
Schaefer Michael
SVP, Chief Technical Officer
—
—
—
12,459
0.0731%
$849.45K
+11.7%
Cotter Jeffrey Louis
Sr VP and General Counsel
—
—
—
7,561
0.0443%
$515.51K
—
Moorefield Jeffrey C.
Sr VP, Global Operations
—
—
—
7,043
0.0413%
$480.19K
+27.4%
Hider Andrew P.
Director
—
—
—
6,987
0.0410%
$476.37K
—
Christianson Brock R.
SVP, CHIEF HR OFFICER
—
—
—
6,315
0.0370%
$430.56K
—
Glusick Daniel E.
SVP, OPERATIONS
—
—
—
5,940
0.0348%
$404.99K
—
Talbott Mary E
Senior VP, GC and Corp. Sec.
—
—
—
5,738
0.0337%
$391.22K
—
SHEAHAN MARK W
Director
—
—
—
4,348
0.0255%
$296.45K
—
CEBULLA ANDREW J.
Interim CFO
—
—
—
2,027
0.0119%
$138.20K
+39.6%
ALLEN PATRICK E
Director
—
—
—
1,927
0.0113%
$131.38K
—

Individual transactions

140
Insider
Date
Role
Action
Shares
Price
Amount
Morse Timothy R.
12 Aug 2026
Director
Buy
1,500
$68.18
$102.27K
Mulligan Donal L
12 Aug 2026
Director
Buy indirect
8,000
$67.34
$538.72K
Zay Richard H.
7 May 2026
CHIEF COMMERCIAL OFFICER
Sell
6,875
$88.02
$605.10K
Mulligan Donal L
14 Apr 2026
Director
Exercised, kept
3,538
$54.70
$193.53K
Glerum James T Jr.
2 Mar 2026
Director
Buy
8,163
$61.25
$499.98K
Arvani Azita
27 Feb 2026
Director
Sold after exercise
3,156
$61.40
$193.79K
Mulligan Donal L
27 Feb 2026
Director
Buy indirect
3,000
$61.61
$184.83K
Huml David W.
26 Feb 2026
PRESIDENT AND CEO
Buy
175
$65.48
$11.46K
Huml David W.
26 Feb 2026
PRESIDENT AND CEO
Buy
1,225
$65.01
$79.64K
Huml David W.
26 Feb 2026
PRESIDENT AND CEO
Buy
2,600
$64.02
$166.46K
Windley David
26 Feb 2026
Director
Sold after exercise
3,694
$63.86
$235.90K
EICHER CAROL S
26 Feb 2026
Director
Sold after exercise
3,130
$61.98
$194.00K
Mulligan Donal L
26 Feb 2026
Director
Buy indirect
5,000
$63.86
$319.30K
Zay Richard H.
19 Aug 2025
CHIEF COMMERCIAL OFFICER
Sell
4,042
$83.21
$336.32K
Balinski Barb
28 Feb 2025
SVP, Chief Transf Officer
Sell
1,717
$86.42
$148.38K
Arvani Azita
28 Feb 2025
Director
Sold after exercise
2,358
$85.22
$200.95K
Zay Richard H.
24 Feb 2025
CHIEF COMMERCIAL OFFICER
Sold after exercise
7,053
$87.58
$617.67K
Balinski Barb
28 Aug 2024
SVP, INNOVATION & TECHNOLOGY
Sell
1,500
$96.61
$144.91K
ERICKSON KRISTIN A.
8 Mar 2024
SVP, GENERAL COUNSEL
Sold after exercise
556
$110.00
$61.16K
ERICKSON KRISTIN A.
7 Mar 2024
SVP, GENERAL COUNSEL
Sold after exercise
1,270
$110.66
$140.53K
Huml David W.
4 Mar 2024
PRESIDENT AND CEO
Sold after exercise
1,100
$112.39
$123.63K
Huml David W.
4 Mar 2024
PRESIDENT AND CEO
Sold after exercise
5,695
$111.53
$635.17K
Huml David W.
4 Mar 2024
PRESIDENT AND CEO
Sold after exercise
13,214
$110.40
$1.46M
Arvani Azita
4 Mar 2024
Director
Sold after exercise
1,765
$111.72
$197.18K
EICHER CAROL S
28 Feb 2024
Director
Sold after exercise
2,298
$116.45
$267.60K
Sonnenberg Steven Alan
27 Feb 2024
Director
Sold after exercise
8,910
$110.09
$980.88K
Mulligan Donal L
27 Feb 2024
Director
Sold after exercise
2,358
$110.00
$259.38K
Zay Richard H.
27 Feb 2024
CHIEF COMMERCIAL OFFICER
Sold after exercise
14,743
$110.19
$1.62M
Windley David
27 Feb 2024
Director
Sell
7,250
$113.24
$820.95K
ERICKSON KRISTIN A.
7 Nov 2023
SVP, GENERAL COUNSEL
Sold after exercise
950
$82.00
$77.90K
Mulligan Donal L
3 Oct 2023
Director
Sold after exercise
1,765
$73.94
$130.50K
Sonnenberg Steven Alan
30 Aug 2023
Director
Sold after exercise
1,765
$83.24
$146.92K
Huml David W.
14 Aug 2023
PRESIDENT AND CEO
Sold after exercise
4,599
$83.83
$385.53K
Zay Richard H.
10 Aug 2023
CHIEF COMMERCIAL OFFICER
Sold after exercise
5,559
$85.79
$476.91K
McKnight Carol E.
26 May 2023
FORMER, SVP, CHIEF ADMIN OFFR
Sold after exercise
15,999
$75.41
$1.21M
McKnight Carol E.
25 May 2023
FORMER, SVP, CHIEF ADMIN OFFR
Sold after exercise
4,445
$75.74
$336.68K
McKnight Carol E.
24 May 2023
SVP, CHIEF ADMIN OFFICER
Sold after exercise
1,500
$76.83
$115.24K
McKnight Carol E.
24 May 2023
SVP, CHIEF ADMIN OFFICER
Sold after exercise
5,430
$76.14
$413.44K
McKnight Carol E.
23 May 2023
SVP, CHIEF ADMIN OFFICER
Sold after exercise
3,832
$77.57
$297.26K
Zay Richard H.
3 May 2023
CHIEF COMMERCIAL OFFICER
Sell
3,719
$79.46
$295.51K
Mulligan Donal L
3 Apr 2023
Director
Sold after exercise
2,320
$68.38
$158.64K
Arvani Azita
7 Mar 2023
Director
Sold after exercise
2,320
$70.69
$164.00K
Sonnenberg Steven Alan
11 Nov 2022
Director
Sold after exercise
2,320
$46.59
$108.09K
EICHER CAROL S
19 Aug 2022
Director
Sold after exercise
300
$70.12
$21.04K
EICHER CAROL S
19 Aug 2022
Director
Sold after exercise
1,280
$68.12
$87.19K
Zay Richard H.
16 Aug 2022
CHIEF COMMERCIAL OFFICER
Sell
441
$71.52
$31.54K
Zay Richard H.
16 Aug 2022
CHIEF COMMERCIAL OFFICER
Sell
2,059
$70.63
$145.42K
Arvani Azita
9 Nov 2021
Director
Sold after exercise
1,411
$83.60
$117.95K
Mulligan Donal L
1 Nov 2021
Director
Sold after exercise
2,531
$80.00
$202.48K
Zay Richard H.
20 Aug 2021
Chief Commercial Officer
Sold after exercise
3,680
$71.95
$264.78K
Zay Richard H.
18 Aug 2021
Chief Commercial Officer
Sold after exercise
1,100
$73.31
$80.65K
Zay Richard H.
18 Aug 2021
Chief Commercial Officer
Sold after exercise
500
$72.13
$36.06K
EICHER CAROL S
28 May 2021
Director
Sold after exercise
1,281
$83.24
$106.63K
Zay Richard H.
10 May 2021
Chief Commercial Officer
Sell
1,084
$85.84
$93.05K
Zay Richard H.
10 May 2021
Chief Commercial Officer
Sell
2,698
$84.54
$228.09K
Huml David W.
10 May 2021
President and CEO
Sell
3,932
$86.62
$340.57K
Huml David W.
10 May 2021
President and CEO
Sell
1,063
$85.23
$90.60K
KILLINGSTAD CHRIS
20 Apr 2021
Director
Sold after exercise
2,512
$79.15
$198.82K
KILLINGSTAD CHRIS
7 Apr 2021
Director
Sold after exercise
5,023
$80.93
$406.51K
Austen William F.
15 Mar 2021
Director
Exercised, kept
1,750
$40.81
$71.42K
KILLINGSTAD CHRIS
8 Mar 2021
Director
Sell
3,809
$80.00
$304.72K
KILLINGSTAD CHRIS
2 Feb 2021
President and CEO
Sold after exercise
3,297
$70.00
$230.79K
KILLINGSTAD CHRIS
1 Feb 2021
President and CEO
Sold after exercise
6,593
$67.93
$447.86K
KILLINGSTAD CHRIS
22 Jan 2021
President and CEO
Sell
3,809
$75.00
$285.68K
KILLINGSTAD CHRIS
4 Jan 2021
President and CEO
Sold after exercise
9,889
$70.00
$692.23K
KILLINGSTAD CHRIS
9 Dec 2020
President and CEO
Sold after exercise
3,270
$70.00
$228.90K
KILLINGSTAD CHRIS
8 Dec 2020
President and CEO
Sold after exercise
27
$70.00
$1.89K
Huml David W.
7 Dec 2020
Chief Operating Officer
Sell
492
$69.29
$34.09K
WICHMANN DAVID S
3 Dec 2020
Director
Sold after exercise
1,750
$67.63
$118.36K
KILLINGSTAD CHRIS
1 Dec 2020
President and CEO
Sold after exercise
6,592
$67.78
$446.81K
KILLINGSTAD CHRIS
24 Nov 2020
President and CEO
Sell
15,302
$70.00
$1.07M
KILLINGSTAD CHRIS
16 Nov 2020
President and CEO
Sold after exercise
3,297
$64.14
$211.47K
EICHER CAROL S
13 Nov 2020
Director
Sold after exercise
1,131
$63.30
$71.59K
Zay Richard H.
9 Nov 2020
SVP, Technology and Innovation
Sell
14,731
$64.00
$942.78K
KILLINGSTAD CHRIS
9 Nov 2020
President and CEO
Sold after exercise
3,296
$68.00
$224.13K
KILLINGSTAD CHRIS
9 Nov 2020
President and CEO
Sold after exercise
3,296
$65.00
$214.24K
KILLINGSTAD CHRIS
3 Feb 2020
President and CEO
Sold after exercise
1,850
$77.70
$143.75K
KILLINGSTAD CHRIS
3 Feb 2020
President and CEO
Sold after exercise
10,989
$76.96
$845.70K
KILLINGSTAD CHRIS
2 Jan 2020
President and CEO
Sold after exercise
1,638
$77.89
$127.58K
KILLINGSTAD CHRIS
2 Jan 2020
President and CEO
Sold after exercise
11,205
$77.65
$870.07K
Mulligan Donal L
5 Dec 2019
Director
Sold after exercise
1,750
$80.00
$140.00K
Huml David W.
4 Dec 2019
SVP, Global Marketing
Sell
506
$79.06
$40.00K
KILLINGSTAD CHRIS
2 Dec 2019
President and CEO
Sold after exercise
10
$74.56
$745.60
KILLINGSTAD CHRIS
2 Dec 2019
President and CEO
Sold after exercise
12,833
$74.38
$954.46K
Huml David W.
14 Nov 2019
SVP, Global Marketing
Sell
424
$70.10
$29.72K
Zay Richard H.
11 Nov 2019
SVP, The Americas
Sold after exercise
7,301
$77.46
$565.50K
Austen William F.
11 Nov 2019
Director
Exercised, kept
2,256
$34.28
$77.34K
Sonnenberg Steven Alan
5 Nov 2019
Director
Sold after exercise
4,281
$78.49
$336.02K
KILLINGSTAD CHRIS
1 Nov 2019
President and CEO
Sold after exercise
4,474
$77.21
$345.46K
KILLINGSTAD CHRIS
1 Nov 2019
President and CEO
Sold after exercise
8,369
$76.74
$642.24K
KILLINGSTAD CHRIS
11 Oct 2019
President and CEO
Sold after exercise
3,800
$70.00
$266.00K
KILLINGSTAD CHRIS
1 Oct 2019
President and CEO
Sold after exercise
650
$71.19
$46.27K
KILLINGSTAD CHRIS
1 Oct 2019
President and CEO
Sold after exercise
2,050
$70.53
$144.58K
KILLINGSTAD CHRIS
1 Oct 2019
President and CEO
Sold after exercise
6,343
$68.22
$432.74K
KILLINGSTAD CHRIS
10 Sep 2019
President and CEO
Sold after exercise
6,500
$70.00
$455.00K
KILLINGSTAD CHRIS
9 Sep 2019
President and CEO
Sold after exercise
4,143
$68.00
$281.72K
KILLINGSTAD CHRIS
5 Sep 2019
President and CEO
Sold after exercise
2,200
$68.00
$149.60K
WICHMANN DAVID S
16 Aug 2019
Director
Sold after exercise
1,660
$69.07
$114.65K
KILLINGSTAD CHRIS
1 Aug 2019
President and CEO
Sold after exercise
200
$74.44
$14.89K
KILLINGSTAD CHRIS
1 Aug 2019
President and CEO
Sold after exercise
6,446
$73.60
$474.42K
KILLINGSTAD CHRIS
1 Aug 2019
President and CEO
Sold after exercise
6,197
$73.03
$452.57K
Zay Richard H.
31 Jul 2019
SVP, The Americas
Sold after exercise
2,000
$74.99
$149.98K
Zay Richard H.
31 Jul 2019
SVP, The Americas
Sold after exercise
2,000
$69.99
$139.98K
Mulligan Donal L
31 Jul 2019
Director
Sold after exercise
2,985
$70.00
$208.95K
KILLINGSTAD CHRIS
16 Jul 2019
President and CEO
Sold after exercise
250
$67.11
$16.78K
KILLINGSTAD CHRIS
16 Jul 2019
President and CEO
Sold after exercise
7,735
$66.55
$514.80K
KILLINGSTAD CHRIS
16 Jul 2019
President and CEO
Sold after exercise
4,858
$65.83
$319.81K
KILLINGSTAD CHRIS
18 Jun 2019
President and CEO
Sold after exercise
2,001
$62.24
$124.54K
KILLINGSTAD CHRIS
18 Jun 2019
President and CEO
Sold after exercise
10,842
$61.53
$667.09K
EICHER CAROL S
28 May 2019
Director
Sold after exercise
1,335
$58.97
$78.73K
Sonnenberg Steven Alan
10 May 2019
Director
Sold after exercise
2,256
$65.31
$147.34K
Austen William F.
7 Mar 2019
Director
Exercised, kept
2,000
$19.54
$39.08K
Huml David W.
6 Sep 2018
SVP, Global Marketing
Sold after exercise
13,416
$75.15
$1.01M
PAULSON THOMAS
9 Aug 2018
SVP, CFO
Sold after exercise
300
$78.87
$23.66K
PAULSON THOMAS
9 Aug 2018
SVP, CFO
Sold after exercise
14,700
$78.29
$1.15M
Huml David W.
8 Aug 2018
SVP, Global Marketing
Sold after exercise
6,550
$79.57
$521.16K
Huml David W.
1 May 2018
Sr. VP, Global Marketing
Sell
415
$72.99
$30.29K
PAULSON THOMAS
23 Apr 2018
Sr. Vice President and CFO
Sold after exercise
1,279
$74.95
$95.86K
PAULSON THOMAS
23 Apr 2018
Sr. Vice President and CFO
Sold after exercise
9,296
$72.95
$678.14K
Zay Richard H.
23 Apr 2018
SVP - The Americas
Sell
664
$73.00
$48.47K
KILLINGSTAD CHRIS
17 Apr 2018
President and CEO
Sold after exercise
44,271
$71.00
$3.14M
KILLINGSTAD CHRIS
16 Apr 2018
President and CEO
Sold after exercise
4,427
$68.58
$303.61K
KILLINGSTAD CHRIS
11 Apr 2018
President and CEO
Sold after exercise
13,281
$68.36
$907.83K
KILLINGSTAD CHRIS
10 Apr 2018
President and CEO
Sold after exercise
17,708
$68.99
$1.22M
KILLINGSTAD CHRIS
9 Apr 2018
President and CEO
Sold after exercise
26,564
$68.25
$1.81M
PAULSON THOMAS
6 Apr 2018
Sr. Vice President and CFO
Sold after exercise
9,296
$69.08
$642.16K
Austen William F.
6 Mar 2018
Director
Exercised, kept
2,000
$33.78
$67.56K
PAULSON THOMAS
11 Jan 2018
Sr. Vice President and CFO
Sell
6,694
$72.90
$488.00K
PAULSON THOMAS
5 Jun 2017
SVP, CFO
Sold after exercise
6,474
$73.95
$478.75K
Zay Richard H.
2 Jun 2017
SVP, The Americas
Sell
1,280
$73.00
$93.44K
PAULSON THOMAS
2 Jun 2017
SVP, CFO
Sold after exercise
1,026
$73.95
$75.87K
EICHER CAROL S
1 May 2017
Director
Sold after exercise
1,928
$73.76
$142.21K
PAULSON THOMAS
10 Apr 2017
SVP, CFO
Sold after exercise
7,500
$71.71
$537.84K
Wilson Heidi M
6 Mar 2017
SVP, General Counsel and Sec'y
Sold after exercise
5,790
$71.65
$414.84K
Austen William F.
2 Mar 2017
Director
Exercised, kept
2,000
$32.17
$64.34K
Sonnenberg Steven Alan
1 Mar 2017
Director
Sold after exercise
4,600
$72.16
$331.94K
Sonnenberg Steven Alan
28 Feb 2017
Director
Sold after exercise
1,400
$72.19
$101.07K
Austen William F.
26 Jan 2017
Director
Exercised, kept
438
$31.16
$13.65K
PAULSON THOMAS
8 Nov 2016
SVP, CFO
Sold after exercise
15,000
$68.00
$1.02M
SHANK STEPHEN G
2 Nov 2016
Director
Exercised, kept
2,000
$32.17
$64.34K

What was left out

Form 4 filings counted 313
Amendments (4/A) skipped 8
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 101
Sales at will 23
Transactions with no price 0
Shares from compensation/vesting 1,478,610
Sales filed before the plan box existed 17
History held since 3 Nov 2016