Comparable stake leader
BlackRock, Inc.
SEC ownership of TSS, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001320760.
Disclosed value leader
Peter H. Woodward
Comparable rows
50/50
Latest evidence
27 Jun 2026
- Public ticker
- TSSI 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
-
27 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001320760
- Issuer location
- Round Rock, TX
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 TSS, Inc. (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
Peter H. Woodward
Comparable rows
50/50
Latest evidence
27 Jun 2026
13F
13D/G
3/4/5
Lead comparable stake: 5.3%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 5.3%.
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.
5.3%
JANE STREET GROUP, LLC
5.2%
Peter H. Woodward
11%
Darryll E. Dewan
1.6%
Karl Todd Marrott
1.4%
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
|
5.3%
from 13D/G
|
$23,039,278
1,770,890 shares
|
— | 31 Mar 2026 |
| JANE STREET GROUP, LLC |
13D/G
13F
Company
|
5.2%
|
$16,979,302
1,466,261 shares
|
$0 | 26 May 2026 |
| Peter H. Woodward |
3/4/5
Director
|
11%
|
$45,108,149
3,024,354 shares
|
-$5,206,710 | 29 May 2026 |
| Darryll E. Dewan |
3/4/5
Chief Executive Officer
|
1.6%
|
$7,791,057
459,471 shares
|
-$2,400,000 | 06 May 2026 |
| Karl Todd Marrott |
3/4/5
Chief Operating Officer
|
1.4%
|
$5,248,845
403,447 shares
|
-$1,211,003 | 27 Jun 2026 |
| Kieran Brennan |
3/4/5
Senior Vice President
|
0.96%
|
$4,341,707
271,333 shares
|
-$307,254 | 01 Jun 2026 |
| Richard M. Metzler |
3/4/5
Director
|
0.55%
|
$1,087,483
153,784 shares
|
— | 14 Jan 2026 |
| Michael John Fahy |
3/4/5
Director
|
0.03%
|
$62,116
8,784 shares
|
+$40,000 | 14 Jan 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: -$9,946,017.
Buys
$40,000
Insiders: 1
Sells
$9,986,017
Insiders: 5
Net
-$9,946,017
Shares: -651,274
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 5,000
Shares: 656,274
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 410,000 | $0 | $6,572,014 | -$6,572,014 |
| 3-6 | 0 | 126,649 | $0 | $1,870,059 | -$1,870,059 |
| 6-9 | 5,000 | 51,700 | $40,000 | $444,710 | -$404,710 |
| 9-12 | 0 | 67,925 | $0 | $1,099,233 | -$1,099,233 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-11 of 11 reporting-owner rows connected to TSS, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
11
Largest Forms 3/4/5 holder
Peter H. Woodward
Net 12M change
-$9,946,017
Latest report
27 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Peter H. Woodward | Director | $45,108,149 | -$5,206,710 | -10% | Mixed | 29 May 2026 |
| Darryll E. Dewan | Chief Executive Officer | $7,791,057 | -$2,400,000 | -24% | Mixed | 06 May 2026 |
| Karl Todd Marrott | Chief Operating Officer | $5,248,845 | -$1,211,003 | -19% | Mixed | 27 Jun 2026 |
| Daniel M. Chism | Chief Financial Officer | $5,073,225 | -$861,050 | -15% | Filing P/S | 14 Apr 2026 |
| Kieran Brennan | Senior Vice President | $4,341,707 | -$307,254 | -6.6% | Filing P/S | 01 Jun 2026 |
| John K. Penver | Chief Financial Officer | $1,230,795 | Mixed | 17 May 2024 | ||
| James Mulford Olivier III | Cro | $1,164,091 | Filing P/S | 03 Dec 2024 | ||
| Richard M. Metzler | Director | $1,087,483 | Mixed | 14 Jan 2026 | ||
| Anthony Angelini | Director | $393,515 | Mixed | 14 Nov 2022 | ||
| Michael John Fahy | Director | $62,116 | +$40,000 | +181% | Mixed | 14 Jan 2026 |
| Vivek Mohindra | Director | $26,758 | Mixed | 14 Jan 2026 |
Recent insider transactions for TSS, Inc.
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Karl Todd Marrott | TSSI | Common Stock | Tax liability | -10.9% | -49,188 | 403,447 | 27 Jun 2026 | Direct | ||
| Peter H. Woodward | TSSI | Common Stock | Sale | -8.24% | $1,548,000 | $15.48 | -100,000 | 1,114,061 | 02 Jun 2026 | Shares held through MHW SVP II, LLC |
| Kieran Brennan | TSSI | Common Stock | Sale | -3.55% | $160,014 | $16.00 | -10,000 | 271,333 | 01 Jun 2026 | Direct |
| Peter H. Woodward | TSSI | Common Stock | Sale | -16.9% | $3,214,000 | $16.07 | -200,000 | 983,521 | 29 May 2026 | Shares held through MHW Partners, L.P. |
| Darryll E. Dewan | TSSI | Common Stock | Sale | -9.91% | $850,000 | $17.00 | -50,000 | 454,471 | 06 May 2026 | Direct |
| Darryll E. Dewan | TSSI | Common Stock | Sale | -9.02% | $800,000 | $16.00 | -50,000 | 504,471 | 22 Apr 2026 | Direct |
| Karl Todd Marrott | TSSI | Common Stock | Sale | -8.6% | $357,206 | $15.11 | -23,636 | 251,287 | 17 Apr 2026 | Direct |
| Karl Todd Marrott | TSSI | Common Stock | Sale | -0.27% | $12,000 | $15.00 | -800 | 290,136 | 16 Apr 2026 | Direct |
| Karl Todd Marrott | TSSI | Common Stock | Sale | -5.24% | $228,613 | $15.03 | -15,213 | 274,923 | 14 Apr 2026 | Direct |
| Darryll E. Dewan | TSSI | Common Stock | Sale | -8.27% | $750,000 | $15.00 | -50,000 | 554,471 | 14 Apr 2026 | Direct |
| Daniel M. Chism | TSSI | Common Stock | Sale | -6.88% | $375,000 | $15.00 | -25,000 | 338,215 | 14 Apr 2026 | Direct |
| Daniel M. Chism | TSSI | Common Stock | Tax liability | -0.17% | -609 | 363,215 | 23 Mar 2026 | Direct | ||
| Daniel M. Chism | TSSI | Common Stock | Award | 1.39% | 5,000 | 363,824 | 23 Mar 2026 | Direct | ||
| Kieran Brennan | TSSI | Common Stock | Tax liability | 0.11% | 304 | 281,333 | 23 Mar 2026 | Direct | ||
| Kieran Brennan | TSSI | Common Stock | Award | 0.9% | 2,500 | 281,637 | 23 Mar 2026 | Direct | ||
| Darryll E. Dewan | TSSI | Common Stock | Award | 0.83% | 5,000 | 604,471 | 23 Mar 2026 | Direct | ||
| Karl Marrott Todd | TSSI | Common Stock | Tax liability | -0.21% | -609 | 290,936 | 23 Mar 2026 | Direct | ||
| Karl Marrott Todd | TSSI | Common Stock | Award | 1.74% | 5,000 | 291,545 | 23 Mar 2026 | Direct | ||
| Kieran Brennan | TSSI | Common Stock | Sale | -4.12% | $147,240 | $12.27 | -12,000 | 279,137 | 16 Mar 2026 | Direct |
| Kieran Brennan | TSSI | Common Stock | Tax liability | -3% | -9,019 | 291,137 | 24 Feb 2026 | Direct | ||
| Karl Todd Marrott | TSSI | Common Stock | Tax liability | -2.75% | -8,117 | 286,545 | 24 Feb 2026 | Direct | ||
| Darryll E. Dewan | TSSI | Common Stock | Tax liability | -4.15% | -25,960 | 599,471 | 29 Jan 2026 | Direct | ||
| Darryll E. Dewan | TSSI | Common Stock | Tax liability | -4.12% | -26,903 | 625,431 | 16 Jan 2026 | Direct | ||
| Daniel M. Chism | TSSI | Common Stock | Tax liability | -3.28% | -12,175 | 358,824 | 16 Jan 2026 | Direct | ||
| Karl Todd Marrott | TSSI | Common Stock | Tax liability | -3.97% | -12,175 | 294,662 | 16 Jan 2026 | Direct | ||
| Kieran Brennan | TSSI | Common Stock | Award | 4.23% | 12,181 | 300,156 | 14 Jan 2026 | Direct | ||
| Daniel M. Chism | TSSI | Common Stock | Award | 9.8% | 33,113 | 370,999 | 14 Jan 2026 | Direct | ||
| Darryll E. Dewan | TSSI | Common Stock | Award | 6.16% | 37,843 | 652,334 | 14 Jan 2026 | Direct | ||
| Michael John Fahy | TSSI | Common Stock | Award | 75.7% | 3,784 | 8,784 | 14 Jan 2026 | Direct | ||
| Karl Todd Marrott | TSSI | Common Stock | Award | 10.8% | 29,801 | 306,837 | 14 Jan 2026 | Direct | ||
| Richard M. Metzler | TSSI | Common Stock | Award | 2.52% | 3,784 | 153,784 | 14 Jan 2026 | Direct | ||
| Vivek Mohindra | TSSI | Common Stock | Award | 3,784 | 3,784 | 14 Jan 2026 | Direct | |||
| Peter H. Woodward | TSSI | Common Stock | Award | 24.3% | 3,784 | 19,358 | 14 Jan 2026 | Direct | ||
| Daniel M. Chism | TSSI | Common Stock | Options Exercise | 14.1% | 41,667 | 337,886 | 08 Jan 2026 | Direct | ||
| Daniel M. Chism | TSSI | Employee Stock Option | Options Exercise | -33.3% | -41,667 | 83,333 | 08 Jan 2026 | Direct | ||
| Karl Todd Marrott | TSSI | Common Stock | Tax liability | -4.66% | -13,539 | 277,036 | 01 Jan 2026 | Direct | ||
| Darryll E. Dewan | TSSI | Common Stock | Tax liability | -2.16% | -13,539 | 614,491 | 01 Jan 2026 | Direct | ||
| Peter H. Woodward | TSSI | Common Stock | Sale | -100% | $180,110 | $8.30 | -21,700 | 0 | 11 Dec 2025 | Shares held through MHW Capital Management LLC |
| Peter H. Woodward | TSSI | Common Stock | Sale | -58% | $264,600 | $8.82 | -30,000 | 21,700 | 09 Dec 2025 | Shares held through MHW Capital Management LLC |
| Karl Todd Marrott | TSSI | Common Stock | Gift | -1.69% | -5,000 | 290,575 | 03 Dec 2025 | Direct | ||
| Michael John Fahy | TSSI | Common Stock | Purchase | $40,000 | $8.00 | 5,000 | 5,000 | 18 Nov 2025 | By Spouse | |
| Vivek Mohindra | TSSI | Employee Stock Option | Award | 6,000 | 6,000 | 11 Nov 2025 | Direct | |||
| Karl Todd Marrott | TSSI | Common Stock | Sale | -3.62% | $179,487 | $16.17 | -11,100 | 295,575 | 10 Sep 2025 | Direct |
| Daniel M. Chism | TSSI | Common Stock | Sale | -4.82% | $242,550 | $16.17 | -15,000 | 296,219 | 10 Sep 2025 | Direct |
| Daniel M. Chism | TSSI | Common Stock | Sale | -1.58% | $81,000 | $16.20 | -5,000 | 311,219 | 28 Aug 2025 | Direct |
| Karl Todd Marrott | TSSI | Common Stock | Sale | -7.23% | $386,353 | $16.16 | -23,908 | 306,675 | 28 Aug 2025 | Direct |
| Daniel M. Chism | TSSI | Common Stock | Sale | -3.07% | $162,500 | $16.25 | -10,000 | 316,219 | 27 Aug 2025 | Direct |
| Karl Todd Marrott | TSSI | Common Stock | Sale | -0.87% | $47,343 | $16.23 | -2,917 | 330,583 | 27 Aug 2025 | Direct |
* marks a reported price that did not pass the local price check.