TSS, Inc. (TSSI) has 20 known insider and institutional holders on record. The largest holder is Rosato Thomas P with 1,454,509 shares. Other notable holders include Gallagher Gerard J and ANGELINI ANTHONY.
Over the last 12 months, insiders have made 41 transactions in TSSI stock — 12 buys (valued at $150.51K) and 15 sells (valued at $2.35M). Insider selling has exceeded buying during this period.
TSSI Insider Ownership
Top Holder
Rosato Thomas P
1,454,509 shares
Buys (12 mo)
12
$150.51K value
Sells (12 mo)
15
$2.35M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Rosato Thomas P |
10 Percent Owner |
1,454,509 |
2014-01-03 |
|
| 2 |
Gallagher Gerard J |
Sr. Tech. Advisor & Founder |
1,043,018 |
2020-11-30 |
|
| 3 |
Angelini Anthony |
Director |
983,787 |
2022-11-16 |
|
| 4 |
Penver John K |
Chief Financial Officer |
911,089 |
2024-02-29 |
|
| 5 |
Ikeda Glen |
10 Percent Owner |
717,364 |
2017-10-16 |
|
| 6 |
Weiss Harvey Louis |
Vice Chairman |
618,300 |
2008-12-09 |
|
| 7 |
Dewan Darryll E |
Chief Executive Officer |
604,471 |
2026-03-25 |
|
| 8 |
Mcmillen Charles Thomas |
Chairman |
575,000 |
2005-07-15 |
|
| 9 |
Olsen Martin T. |
EVP, Sales and Marketing |
380,000 |
2015-03-13 |
|
| 10 |
Sonkin Paul D |
10 Percent Owner |
379,567 |
2008-12-08 |
|
| 11 |
Chism Daniel M |
Chief Financial Officer |
363,215 |
2026-03-25 |
|
| 12 |
Kitt Barry M |
10 Percent Owner |
351,223 |
2008-08-20 |
|
| 13 |
Schwarz Ken |
Chief Financial Officer |
350,000 |
2012-09-27 |
|
| 14 |
Marrott Karl Todd |
Chief Operating Officer |
290,936 |
2026-03-25 |
|
| 15 |
Brennan Kieran |
Senior Vice President |
281,333 |
2026-03-25 |
|
| 16 |
Nickles Donald L |
Director |
250,000 |
2009-05-11 |
|
| 17 |
Mcnerney Maura |
Chief Financial Officer |
200,000 |
2013-05-22 |
|
| 18 |
Crichton Matt |
Sr. V.p., Business Development |
200,000 |
2019-11-13 |
|
| 19 |
Hutchinson Asa |
Director |
200,000 |
2011-05-06 |
|
| 20 |
Metzler Richard M. |
Director |
153,784 |
2026-01-16 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-23 |
Marrott Karl Todd |
Chief Operating Officer |
Tax Withholding of RSU |
609 |
$12.40 |
$7.55K |
| 2026-03-23 |
Dewan Darryll E |
Chief Executive Officer |
RSU Award |
5,000 |
- |
- |
| 2026-03-23 |
Brennan Kieran |
Senior Vice President |
Tax Withholding of RSU |
304 |
$12.40 |
$3.77K |
| 2026-03-23 |
Chism Daniel M |
Chief Financial Officer |
Tax Withholding of RSU |
609 |
$12.40 |
$7.55K |
| 2026-03-16 |
Brennan Kieran |
Senior Vice President |
Informative Sell |
12,000 |
$12.27 |
$147.24K |
| 2026-02-24 |
Marrott Karl Todd |
Chief Operating Officer |
Tax Withholding of RSU |
8,117 |
$8.45 |
$68.59K |
| 2026-02-24 |
Brennan Kieran |
Senior Vice President |
Tax Withholding of RSU |
9,019 |
$8.45 |
$76.21K |
| 2026-01-29 |
Dewan Darryll E |
Chief Executive Officer |
Tax Withholding of RSU |
25,960 |
$11.20 |
$290.75K |
| 2026-01-16 |
Marrott Karl Todd |
Chief Operating Officer |
Tax Withholding of RSU |
12,175 |
$12.05 |
$146.71K |
| 2026-01-16 |
Dewan Darryll E |
Chief Executive Officer |
Tax Withholding of RSU |
26,903 |
$12.05 |
$324.18K |
| 2026-01-16 |
Chism Daniel M |
Chief Financial Officer |
Tax Withholding of RSU |
12,175 |
$12.05 |
$146.71K |
| 2026-01-14 |
Fahy Michael John |
Director |
RSU Award |
3,784 |
- |
- |
| 2026-01-14 |
Marrott Karl Todd |
Chief Operating Officer |
RSU Award |
29,801 |
- |
- |
| 2026-01-14 |
Dewan Darryll E |
Chief Executive Officer |
RSU Award |
37,843 |
- |
- |
| 2026-01-14 |
Metzler Richard M. |
Director |
RSU Award |
3,784 |
- |
- |
| 2026-01-14 |
Brennan Kieran |
Senior Vice President |
RSU Award |
12,181 |
- |
- |
| 2026-01-14 |
Mohindra Vivek |
Director |
RSU Award |
3,784 |
- |
- |
| 2026-01-14 |
Woodward Peter H |
Director |
RSU Award |
3,784 |
- |
- |
| 2026-01-14 |
Chism Daniel M |
Chief Financial Officer |
RSU Award |
33,113 |
- |
- |
| 2026-01-08 |
Chism Daniel M |
Chief Financial Officer |
Option Exercise (Sell) |
41,667 |
$1.72 |
$71.67K |
| 2026-01-01 |
Marrott Karl Todd |
Chief Operating Officer |
Tax Withholding of RSU |
13,539 |
$7.07 |
$95.72K |
| 2026-01-01 |
Dewan Darryll E |
Chief Executive Officer |
Tax Withholding of RSU |
13,539 |
$7.07 |
$95.72K |
| 2025-12-11 |
Woodward Peter H |
Director |
Informative Sell |
21,700 |
$8.30 |
$180.11K |
| 2025-12-09 |
Woodward Peter H |
Director |
Informative Sell |
30,000 |
$8.82 |
$264.6K |
| 2025-12-03 |
Marrott Karl Todd |
Chief Operating Officer |
Gift (Given) |
5,000 |
- |
- |
