Comparable stake leader
RTW INVESTMENTS, LP
SEC ownership of iRhythm Holdings, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001388658.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
07 Aug 2026
- Public ticker
- IRTC on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
RTW INVESTMENTS, LP
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
RTW INVESTMENTS, LP
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
07 Aug 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001388658
- Issuer location
- San Francisco, CA
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 iRhythm Holdings, 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
RTW INVESTMENTS, LP
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
07 Aug 2026
13D/G
13F
3/4/5
Lead comparable stake: 6.6%
13D/G row: RTW INVESTMENTS, LP
Showing 1-8 of 50 holder rows.
Quick read
RTW INVESTMENTS, LP leads the comparable SEC ownership view at 6.6%.
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 RTW INVESTMENTS, LP's linked filing trail.
Comparable ownership
Top 5
RTW INVESTMENTS, LP
6.6%
VANGUARD PORTFOLIO MANAGEMENT LLC
5.6%
VANGUARD CAPITAL MANAGEMENT LLC
5.2%
MILLENNIUM MANAGEMENT LLC
5.1%
Artisan Partners Limited Partnership
5.1%
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 |
|---|---|---|---|---|---|
| RTW INVESTMENTS, LP |
13D/G
13F
Company
|
6.6%
|
$273,025,312
2,182,631 shares
|
+$64,312,647 | 30 Jun 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13F
13D/G
Company · Vanguard Portfolio Management
|
5.6%
from 13D/G
|
$227,667,445
1,913,976 shares
|
— | 30 Jun 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
5.2%
|
$199,628,993
1,691,483 shares
|
$0 | 31 Mar 2026 |
| MILLENNIUM MANAGEMENT LLC |
13D/G
13F
Company
|
5.1%
|
$251,228,085
1,664,203 shares
|
$0 | 16 Mar 2026 |
| Artisan Partners Limited Partnership |
13D/G
13F
Artisan Partners Asset Management Inc. · Company
|
5.1%
|
$207,687,803
1,660,307 shares
|
+$18,552,723 | 30 Jun 2026 |
| Capital Research Global Investors |
13D/G
13F
Company
|
4.7%
|
$204,843,092
1,506,864 shares
|
-$94,581,343 | 30 Jun 2025 |
| Quentin S. Blackford |
3/4/5
President and CEO, Director
|
0.68%
|
$28,172,213
226,008 shares
|
-$11,152,692 | 07 Aug 2026 |
| Patrick Michael Murphy |
3/4/5
CBO and CLO
|
0.21%
|
$8,688,112
69,699 shares
|
-$2,958,733 | 07 Aug 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: -$30,544,288.
Buys
$0
Insiders: 0
Sells
$30,544,288
Insiders: 12
Net
-$30,544,288
Shares: -220,231
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 220,231
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 63,737 | $0 | $7,891,058 | -$7,891,058 |
| 3-6 | 0 | 43,945 | $0 | $5,544,275 | -$5,544,275 |
| 6-9 | 0 | 79,441 | $0 | $10,954,281 | -$10,954,281 |
| 9-12 | 0 | 33,108 | $0 | $6,154,674 | -$6,154,674 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 30 reporting-owner rows connected to iRhythm Holdings, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
30
Largest Forms 3/4/5 holder
Quentin S. Blackford
Net 12M change
-$30,544,288
Latest report
07 Aug 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Quentin S. Blackford | President and CEO, Director | $28,172,213 | -$11,152,692 | -28% | Filing P/S | 07 Aug 2026 |
| Kevin M. King | Director | $25,871,097 | Mixed | 04 Mar 2022 | ||
| Patrick Michael Murphy | CBO and CLO | $8,688,112 | -$2,958,733 | -25% | Filing P/S | 07 Aug 2026 |
| Chad Patterson | Chief Comm & Product Officer | $7,744,123 | -$3,052,220 | -28% | Filing P/S | 07 Aug 2026 |
| Minang Turakhia | Chief Med/Sci Ofcr Evp Advtech | $7,493,531 | -$2,635,682 | -26% | Filing P/S | 07 Aug 2026 |
| Mark J. Day | Chief Technology Officer | $6,797,767 | Filing P/S | 04 Mar 2024 | ||
| Sumi Shrishrimal | EVP, Chief Risk Officer | $5,562,181 | -$2,060,676 | -27% | Filing P/S | 07 Aug 2026 |
| Daniel G. Wilson | Chief Financial Officer | $4,595,827 | -$3,796,435 | -45% | Mixed | 02 Mar 2026 |
| Douglas Devine | Chief Operating Officer | $3,054,463 | Mixed | 03 Mar 2023 | ||
| David A. Vort | Chief Commercial Officer | $2,887,721 | Mixed | 04 Mar 2022 | ||
| Mervin Smith | EVP Strategic Business Ops | $2,736,729 | -$1,194,840 | -30% | Filing P/S | 03 Aug 2026 |
| Abhijit Y. Talwalkar | Director | $2,638,224 | -$2,325,372 | -47% | Mixed | 27 May 2026 |
| Brian Lee Lawrence | Chief Technology Officer | $2,434,603 | -$122,491 | -4.8% | Filing P/S | 04 May 2026 |
| Julianne Rodda | Evp, Chief People Officer | $2,222,722 | -$257,919 | -10% | Filing P/S | 03 Aug 2026 |
| Marc Wade Rosenbaum | Chief Accounting Officer | $1,747,798 | -$872,744 | -33% | Filing P/S | 29 May 2026 |
| Brice Bobzien | Chief Financial Officer | $1,718,266 | Filing P/S | 09 Aug 2024 | ||
| Sean Clinton Freeman | EVP, Strategy & Corp Devt | $1,701,169 | -$114,484 | -6.3% | Filing P/S | 02 Jul 2026 |
| Bruce G. Bodaken | Director | $1,677,182 | Mixed | 27 May 2026 | ||
| Reyna M. Fernandez | EVP, Chief HR Officer | $1,509,876 | Mixed | 27 Feb 2023 | ||
| Mark J. Rubash | Director | $1,470,352 | Mixed | 28 May 2025 |
Recent insider transactions for iRhythm Holdings, 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Minang Turakhia | IRTC | Common Stock | Sale | -10.6% | $884,151 | $124.65 | -7,093 | 60,116 | 10 Aug 2026 | Direct |
| Sumi Shrishrimal | IRTC | Common Stock | Sale | -10.8% | $669,641 | $124.65 | -5,372 | 44,621 | 10 Aug 2026 | Direct |
| Chad Patterson | IRTC | Common Stock | Sale | -10.2% | $884,170 | $124.65 | -7,093 | 62,125 | 10 Aug 2026 | Direct |
| Patrick Michael Murphy | IRTC | Common Stock | Sale | -9.24% | $884,156 | $124.65 | -7,093 | 69,699 | 10 Aug 2026 | Direct |
| Quentin S. Blackford | IRTC | Common Stock | Sale | -10.6% | $3,348,012 | $124.65 | -26,859 | 226,008 | 10 Aug 2026 | Direct |
| Minang Turakhia | IRTC | Common Stock | Award | 25.3% | 13,589 | 67,209 | 07 Aug 2026 | Direct | ||
| Sumi Shrishrimal | IRTC | Common Stock | Award | 24.1% | 9,706 | 49,993 | 07 Aug 2026 | Direct | ||
| Chad Patterson | IRTC | Common Stock | Award | 24.4% | 13,589 | 69,218 | 07 Aug 2026 | Direct | ||
| Patrick Michael Murphy | IRTC | Common Stock | Award | 21.5% | 13,589 | 76,792 | 07 Aug 2026 | Direct | ||
| Quentin S. Blackford | IRTC | Common Stock | Award | 23.8% | 48,534 | 252,867 | 07 Aug 2026 | Direct | ||
| Mervin Smith | IRTC | Common Stock | Sale | -2.68% | $75,349 | $122.12 | -617 | 22,410 | 03 Aug 2026 | Direct |
| Julianne Rodda | IRTC | Common Stock | Sale | -10.4% | $257,919 | $122.12 | -2,112 | 18,201 | 03 Aug 2026 | Direct |
| Chad Patterson | IRTC | Common Stock | Sale | -4.65% | $331,192 | $122.12 | -2,712 | 55,629 | 03 Aug 2026 | Direct |
| Minang Turakhia | IRTC | Common Stock | Sale | -2.59% | $177,462 | $124.71 | -1,423 | 53,620 | 02 Jul 2026 | Direct |
| Sean Clinton Freeman | IRTC | Common Stock | Sale | -6.31% | $114,484 | $124.71 | -918 | 13,641 | 02 Jul 2026 | Direct |
| Sumi Shrishrimal | IRTC | Common Stock | Sale | -4.09% | $185,652 | $108.19 | -1,716 | 40,287 | 02 Jun 2026 | Direct |
| Marc Wade Rosenbaum | IRTC | Common Stock | Sale | -4.32% | $78,870 | $108.19 | -729 | 16,155 | 02 Jun 2026 | Direct |
| Sumi Shrishrimal | IRTC | Common Stock | Award | 0.32% | 133 | 42,003 | 29 May 2026 | Direct | ||
| Marc Wade Rosenbaum | IRTC | Common Stock | Award | 1.07% | 178 | 16,884 | 29 May 2026 | Direct | ||
| Minang Turakhia | IRTC | Common Stock | Award | 0.25% | 137 | 55,043 | 29 May 2026 | Direct | ||
| Chad Patterson | IRTC | Common Stock | Award | 0.3% | 177 | 58,341 | 29 May 2026 | Direct | ||
| Sean Clinton Freeman | IRTC | Common Stock | Award | 1.91% | 273 | 14,559 | 29 May 2026 | Direct | ||
| Quentin S. Blackford | IRTC | Common Stock | Award | 0.09% | 178 | 204,333 | 29 May 2026 | Direct | ||
| Merz Cathleen Noel Bairey | IRTC | Common Stock | Award | 17.5% | 1,573 | 10,546 | 27 May 2026 | Direct | ||
| Bruce G. Bodaken | IRTC | Common Stock | Award | 12.4% | 1,573 | 14,211 | 27 May 2026 | Direct | ||
| Karen Ling | IRTC | Common Stock | Award | 16.4% | 1,573 | 11,141 | 27 May 2026 | Direct | ||
| Karen K. Mcginnis | IRTC | Common Stock | Award | 77.3% | 1,573 | 3,608 | 27 May 2026 | Direct | ||
| Kevin C. Oboyle | IRTC | Common Stock | Award | 77.3% | 1,573 | 3,608 | 27 May 2026 | Direct | ||
| Abhijit Y. Talwalkar | IRTC | Common Stock | Award | 7.75% | 1,573 | 21,872 | 27 May 2026 | Direct | ||
| Brian B. Yoor | IRTC | Common Stock | Award | 28.1% | 1,573 | 7,171 | 27 May 2026 | Direct | ||
| Abhijit Y. Talwalkar | IRTC | Common Stock | Sale | -20.7% | $626,430 | $117.93 | -5,312 | 20,299 | 11 May 2026 | Direct |
| Abhijit Y. Talwalkar | IRTC | Common Stock | Purchase | 26.2% | 5,312 | 25,611 | 11 May 2026 | Direct | ||
| Abhijit Y. Talwalkar | IRTC | Employee Stock Option (right to buy) | Options Exercise | -100% | -5,312 | 0 | 11 May 2026 | Direct | ||
| Brian Lee Lawrence | IRTC | Common Stock | Sale | -4.79% | $122,491 | $120.80 | -1,014 | 20,154 | 04 May 2026 | Direct |
| Mervin Smith | IRTC | Common Stock | Sale | -10.1% | $295,466 | $114.30 | -2,585 | 23,027 | 16 Mar 2026 | Direct |
| Jason H. Patten | IRTC | Common Stock | Award | 100% | 2,218 | 4,436 | 12 Mar 2026 | Direct | ||
| Minang Turakhia | IRTC | Common Stock | Sale | -6.83% | $517,259 | $128.45 | -4,027 | 54,906 | 02 Mar 2026 | Direct |
| Sumi Shrishrimal | IRTC | Common Stock | Sale | -6.33% | $363,484 | $128.44 | -2,830 | 41,870 | 02 Mar 2026 | Direct |
| Mervin Smith | IRTC | Common Stock | Sale | -5.01% | $173,652 | $128.44 | -1,352 | 25,612 | 02 Mar 2026 | Direct |
| Chad Patterson | IRTC | Common Stock | Sale | -7.1% | $570,804 | $128.44 | -4,444 | 58,164 | 02 Mar 2026 | Direct |
| Patrick Michael Murphy | IRTC | Common Stock | Sale | -6.45% | $559,624 | $128.44 | -4,357 | 63,203 | 02 Mar 2026 | Direct |
| Marc Wade Rosenbaum | IRTC | Common Stock | Sale | -4.66% | $104,815 | $128.45 | -816 | 16,706 | 02 Mar 2026 | Direct |
| Daniel G. Wilson | IRTC | Common Stock | Sale | -8.69% | $436,076 | $128.45 | -3,395 | 35,660 | 02 Mar 2026 | Direct |
| Quentin S. Blackford | IRTC | Common Stock | Sale | -6.34% | $1,774,174 | $128.44 | -13,813 | 204,155 | 02 Mar 2026 | Direct |
| Daniel G. Wilson | IRTC | Common Stock | Award | 27.2% | 8,361 | 39,055 | 25 Feb 2026 | Direct | ||
| Minang Turakhia | IRTC | Common Stock | Award | 20.5% | 10,034 | 58,933 | 25 Feb 2026 | Direct | ||
| Quentin S. Blackford | IRTC | Common Stock | Award | 17.1% | 31,842 | 217,968 | 25 Feb 2026 | Direct | ||
| Chad Patterson | IRTC | Common Stock | Award | 21% | 10,870 | 62,608 | 25 Feb 2026 | Direct | ||
| Marc Wade Rosenbaum | IRTC | Common Stock | Award | 16.7% | 2,508 | 17,522 | 25 Feb 2026 | Direct | ||
| Patrick Michael Murphy | IRTC | Common Stock | Award | 11.6% | 7,024 | 67,560 | 25 Feb 2026 | Direct |
* marks a reported price that did not pass the local price check.