TWO SIGMA SECURITIES, LLC

Broker-Dealer

Position in IRTC — iRhythm Holdings, Inc.

CIK 1450144 NEW YORK, NY

Back to IRTC Full portfolio

Position in IRTC

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$388,371

+$69,599 QoQ

Shares Held

3,265

+20.9% QoQ

Ownership

0.010%

of shares outstanding

% of Portfolio

0.05%

of 13F equity value

Holder Rank

#182

of 300 holders

Holding Since

Sep 2020

8 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in IRTC Over Time

Shares Held

Position Value (USD)

Derivatives in IRTC

reported options exposure · as of Mar 31, 2024

CallValue

CallShares

PutValue

$255,200

PutShares

2,200

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Medical Devices

Healthcare · as of Jun 30, 2026

TWO SIGMA SECURITIES, LLC holds $9,759,573 across 19 Medical Devices names. IRTC ranks #6 (4.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	BSX	Boston Scientific Corp	98,200	$4,191,176
2	MDT	Medtronic plc	12,011	$939,620
3	STE	STERIS plc	4,452	$937,457
4	PEN	Penumbra Inc	2,709	$855,366
5	DXCM	Dexcom Inc	8,895	$599,078
6	IRTC	iRhythm Holdings, Inc. This page	3,265	$388,371
7	HAE	Haemonetics Corp	4,746	$355,950
8	SYK	Stryker Corp	1,066	$335,619

All Filings in IRTC

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9 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$388,371	3,265	+20.9%	Shares	Sole	2026-08-14
2026-03-31	$318,772	2,701	-24.7%	Shares	Sole	2026-05-15
2025-09-30	$617,100	3,588	+25.1%	Shares	Sole	2025-11-14
2024-09-30	$212,920	2,868	+192.7%	Shares	Sole	2024-11-14
2024-03-31	$255,200	2,200	-60.7%	Put	Sole	2024-05-15
2023-12-31	$599,424	5,600	+86.7%	Put	Sole	2024-02-14
2023-09-30	$282,780	3,000	—	Put	Sole	2023-11-14
2023-09-30	$263,928	2,800	—	Call	Sole	2023-11-14
2020-09-30	$233,347	980	—	Shares	Sole	2020-11-16
No filing history on record for this holder in this stock.