Comparable stake leader
DODGE & COX
SEC ownership of TransUnion
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001552033.
Disclosed value leader
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
Comparable rows
50/50
Latest evidence
01 Jun 2026
- Public ticker
- TRU on NYSE
- Parsed ownership sources
- 13D/G, 13F, and 3/4/5
- Largest SEC-reported holder
- DODGE & COX
- Latest 13D/G holder
- DODGE & COX
- Latest parsed ownership date
- 01 Jun 2026
- Issuer CIK
- 0001552033
- Issuer location
- Chicago, IL
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of TransUnion (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
DODGE & COX
Disclosed value leader
MASSACHUSETTS FINANCIAL S...
Comparable rows
50/50
Latest evidence
01 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 12%
13D/G row: DODGE & COX
Showing 1-8 of 50 holder rows.
Quick read
DODGE & COX leads the comparable SEC ownership view at 12%.
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 DODGE & COX's linked filing trail.
Comparable ownership
Top 5
DODGE & COX
12%
BlackRock, Inc.
9.6%
MASSACHUSETTS FINANCIAL SERVICES ...
6.8%
Independent Franchise Partners LLP
6.3%
WELLINGTON MANAGEMENT GROUP LLP
5.6%
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 |
|---|---|---|---|---|---|
| DODGE & COX |
13D/G
13F
Company
|
12%
|
$1,593,619,980
23,353,165 shares
|
+$488,847,749 | 31 May 2026 |
| BlackRock, Inc. |
13D/G
13F
Company
|
9.6%
|
$1,560,844,356
18,630,274 shares
|
+$669,093,136 | 30 Sep 2025 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ |
13F
13D/G
Company · Massachusetts Financial Services Company
|
6.8%
from 13D/G
|
$1,597,995,423
13,146,925 shares
|
— | 31 Mar 2026 |
| Independent Franchise Partners LLP |
13D/G
13F
Company
|
6.3%
|
$863,794,413
12,131,944 shares
|
$0 | 31 Mar 2026 |
| WELLINGTON MANAGEMENT GROUP LLP |
13D/G
13F
Company
|
5.6%
|
$897,116,247
10,878,092 shares
|
$0 | 31 Mar 2025 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
5.4%
|
$714,921,174
10,332,724 shares
|
$0 | 31 Mar 2026 |
| Christopher A. Cartwright |
3/4/5
President and CEO, Director
|
0.3%
|
$39,486,525
570,697 shares
|
— | 18 May 2026 |
| Venkat Achanta |
3/4/5
EVP, Chief Tech, Data & Analy.
|
0.08%
|
$10,844,909
156,741 shares
|
— | 18 May 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: -$4,465,378.
Buys
$0
Insiders: 0
Sells
$4,465,378
Insiders: 5
Net
-$4,465,378
Shares: -57,039
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 57,039
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 25,666 | $0 | $1,843,542 | -$1,843,542 |
| 3-6 | 0 | 18,064 | $0 | $1,450,347 | -$1,450,347 |
| 6-9 | 0 | 3,000 | $0 | $247,700 | -$247,700 |
| 9-12 | 0 | 10,309 | $0 | $923,789 | -$923,789 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 33 reporting-owner rows connected to TransUnion. Open a relationship link for the CIK-to-CIK filing trail.
Rows
33
Largest Forms 3/4/5 holder
Christopher A. Cartwright
Net 12M change
-$4,465,377
Latest report
01 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Christopher A. Cartwright | President and CEO, Director | $39,486,525 | Median | 18 May 2026 | ||
| Venkat Achanta | EVP, Chief Tech, Data & Analy. | $10,844,909 | Median | 18 May 2026 | ||
| Todd M. Cello | Evp & Cfo | $10,357,604 | Median | 18 May 2026 | ||
| Steven M. Chaouki | President, US Markets | $7,066,351 | -$2,044,380 | -22% | Filing P/S | 01 Jun 2026 |
| Mohamed Abdelsadek | EVP, Chief Global Solutions | $6,918,052 | Mixed | 01 Apr 2026 | ||
| Todd C. Skinner | President, International | $4,642,273 | -$302,400 | -6.1% | Filing P/S | 01 Jun 2026 |
| Timothy J. Martin | EVP - Global Solutions | $4,299,926 | Filing P/S | 06 Mar 2025 | ||
| Abhi Dhar | Former EVP, Chief Info & Tech | $4,210,001 | Mixed | 29 Jun 2023 | ||
| Alicia Brooke Zuiker | Evp, Chro | $3,993,122 | Mixed | 27 Feb 2026 | ||
| Tiffani Chambers | EVP, Chief Operations Officer | $3,706,852 | -$371,348 | -9.1% | Mixed | 03 Mar 2026 |
| David M. Neenan | President, International | $3,416,292 | Mixed | 30 Jul 2021 | ||
| Heather J. Russell | EVP, Chief Legal Officer | $3,251,973 | -$1,433,994 | -31% | Filing P/S | 29 May 2026 |
| JOSEPH PAMELA A | Director | $2,957,388 | Median | 12 May 2026 | ||
| Susan W. Muigai | Evp, Chro | $2,812,164 | Mixed | 25 Feb 2025 | ||
| Siddharth N. Mehta | Director | $2,538,793 | Mixed | 13 Dec 2021 | ||
| George M. Awad | Director | $2,250,266 | Median | 12 May 2026 | ||
| Thomas L. Monahan | Director | $1,875,810 | Median | 12 May 2026 | ||
| Suzanne Patricia Clark | Director | $1,770,433 | Median | 12 May 2026 | ||
| Richard Dane Mauldin | EVP - Operations | $1,720,767 | Filing P/S | 14 Mar 2024 | ||
| David E. Wojczynski | Former President, Healthcare | $1,657,849 | Mixed | 17 Dec 2021 |
Recent insider transactions for TransUnion
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Jennifer A. Williams | TRU | Common Stock | Tax liability | -5.6% | -404 | 6,815 | 01 Jun 2026 | Direct | ||
| Todd C. Skinner | TRU | Common Stock | Sale | -1.5% | $70,730 | $70.73 | -1,000 | 65,634 | 01 Jun 2026 | Direct |
| Steven M. Chaouki | TRU | Common Stock | Sale | -4.77% | $353,650 | $70.73 | -5,000 | 99,906 | 01 Jun 2026 | Direct |
| Heather J. Russell | TRU | Common Stock | Sale | -12.9% | $480,307 | $71.87 | -6,683 | 45,248 | 29 May 2026 | Direct |
| Todd C. Skinner | TRU | Common Stock | Tax liability | -16.7% | -13,350 | 66,634 | 18 May 2026 | Direct | ||
| Heather J. Russell | TRU | Common Stock | Tax liability | -16.4% | -10,222 | 51,931 | 18 May 2026 | Direct | ||
| Steven M. Chaouki | TRU | Common Stock | Tax liability | -13.3% | -16,063 | 104,906 | 18 May 2026 | Direct | ||
| Venkat Achanta | TRU | Common Stock | Tax liability | -9.37% | -16,213 | 156,741 | 18 May 2026 | Direct | ||
| Todd M. Cello | TRU | Common Stock | Tax liability | -10.9% | -18,253 | 149,698 | 18 May 2026 | Direct | ||
| Christopher A. Cartwright | TRU | Common Stock | Tax liability | -4.45% | -26,284 | 565,006 | 18 May 2026 | Direct | ||
| Todd C. Skinner | TRU | Common Stock | Award | 44.7% | 24,721 | 79,984 | 12 May 2026 | Direct | ||
| Heather J. Russell | TRU | Common Stock | Award | 59% | 23,073 | 62,153 | 12 May 2026 | Direct | ||
| Steven M. Chaouki | TRU | Common Stock | Award | 42.8% | 36,258 | 120,969 | 12 May 2026 | Direct | ||
| Venkat Achanta | TRU | Common Stock | Award | 31.3% | 41,202 | 172,954 | 12 May 2026 | Direct | ||
| Todd M. Cello | TRU | Common Stock | Award | 32.5% | 41,202 | 167,951 | 12 May 2026 | Direct | ||
| Christopher A. Cartwright | TRU | Common Stock | Award | 11.2% | 59,331 | 591,290 | 12 May 2026 | Direct | ||
| Linda Zukauckas | TRU | Common Stock | Award | 23.7% | 3,034 | 15,821 | 12 May 2026 | Direct | ||
| Charlotte Yarkoni | TRU | Common Stock | Award | 362.9% | 3,034 | 3,870 | 12 May 2026 | Direct | ||
| Ravi Kumar Singisetti | TRU | Common Stock | Award | 30.3% | 3,034 | 13,062 | 12 May 2026 | Direct | ||
| Thomas L. Monahan | TRU | Common Stock | Award | 12.6% | 3,034 | 27,111 | 12 May 2026 | Direct | ||
| Charles E. Gottdiener | TRU | Common Stock | Award | 30.1% | 3,034 | 13,123 | 12 May 2026 | Direct | ||
| Russell P. Fradin | TRU | Common Stock | Award | 16.4% | 3,034 | 21,585 | 12 May 2026 | Direct | ||
| Hamidou Dia | TRU | Common Stock | Award | 30.3% | 3,034 | 13,062 | 12 May 2026 | Direct | ||
| Suzanne Patricia Clark | TRU | Common Stock | Award | 13.4% | 3,034 | 25,588 | 12 May 2026 | Direct | ||
| Sayan Chakraborty | TRU | Common Stock | Award | 362.9% | 3,034 | 3,870 | 12 May 2026 | Direct | ||
| George M. Awad | TRU | Common Stock | Award | 10.3% | 3,034 | 32,523 | 12 May 2026 | Direct | ||
| Joseph Pamela A | TRU | Common Stock | Award | 7.64% | 3,034 | 42,743 | 12 May 2026 | Direct | ||
| Todd C. Skinner | TRU | Common Stock | Sale | -0.9% | $35,965 | $71.93 | -500 | 55,263 | 01 May 2026 | Direct |
| Steven M. Chaouki | TRU | Common Stock | Sale | -5.57% | $359,650 | $71.93 | -5,000 | 84,711 | 01 May 2026 | Direct |
| Heather J. Russell | TRU | Common Stock | Sale | -4.83% | $158,640 | $80.00 | -1,983 | 39,080 | 21 Apr 2026 | Direct |
| Steven M. Chaouki | TRU | Common Stock | Sale | -5.28% | $350,000 | $70.00 | -5,000 | 89,711 | 02 Apr 2026 | Direct |
| Mohamed Abdelsadek | TRU | Common Stock | Tax liability | -12.3% | -11,320 | 80,677 | 01 Apr 2026 | Direct | ||
| Todd C. Skinner | TRU | Common Stock | Sale | -0.89% | $34,600 | $69.20 | -500 | 55,763 | 01 Apr 2026 | Direct |
| Heather J. Russell | TRU | Common Stock | Sale | -9.01% | $314,664 | $77.37 | -4,067 | 41,063 | 06 Mar 2026 | Direct |
| Jennifer A. Williams | TRU | Common Stock | Sale | -18.9% | $134,320 | $80.00 | -1,679 | 7,219 | 03 Mar 2026 | Direct |
| Tiffani Chambers | TRU | Common Stock | Tax liability | -15.3% | -9,663 | 53,336 | 03 Mar 2026 | Direct | ||
| Todd C. Skinner | TRU | Common Stock | Sale | -0.88% | $38,320 | $76.64 | -500 | 56,263 | 02 Mar 2026 | Direct |
| Steven M. Chaouki | TRU | Common Stock | Sale | -5.01% | $383,200 | $76.64 | -5,000 | 94,711 | 02 Mar 2026 | Direct |
| Jennifer A. Williams | TRU | Common Stock | Tax liability | -8.24% | -799 | 8,898 | 27 Feb 2026 | Direct | ||
| Jennifer A. Williams | TRU | Common Stock | Award | 18.7% | 1,528 | 9,697 | 27 Feb 2026 | Direct | ||
| Alicia Brooke Zuiker | TRU | Common Stock | Award | 25.8% | 11,776 | 57,455 | 27 Feb 2026 | Direct | ||
| Todd C. Skinner | TRU | Common Stock | Tax liability | -13.4% | -8,809 | 56,763 | 27 Feb 2026 | Direct | ||
| Todd C. Skinner | TRU | Common Stock | Award | 36.5% | 17,537 | 65,572 | 27 Feb 2026 | Direct | ||
| Heather J. Russell | TRU | Common Stock | Tax liability | -13.1% | -6,789 | 45,130 | 27 Feb 2026 | Direct | ||
| Heather J. Russell | TRU | Common Stock | Award | 35.8% | 13,686 | 51,919 | 27 Feb 2026 | Direct | ||
| Tiffani Chambers | TRU | Common Stock | Award | 24.9% | 12,572 | 62,999 | 27 Feb 2026 | Direct | ||
| Steven M. Chaouki | TRU | Common Stock | Tax liability | -9.63% | -10,627 | 99,711 | 27 Feb 2026 | Direct | ||
| Steven M. Chaouki | TRU | Common Stock | Award | 29% | 24,825 | 110,338 | 27 Feb 2026 | Direct | ||
| Venkat Achanta | TRU | Common Stock | Tax liability | -12.6% | -19,058 | 131,752 | 27 Feb 2026 | Direct | ||
| Venkat Achanta | TRU | Common Stock | Award | 21.6% | 26,735 | 150,810 | 27 Feb 2026 | Direct |
* marks a reported price that did not pass the local price check.