Shoulder Innovations SI Insider Ownership

NYSE SI

$19.38 +0.66 (+3.50%)

As of: Oct 21, 2026 · 3:59 PM EDT

Insider Holdings by Owner

9.36Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

48.80%

▲+10.77% pp QoQ

Shares Held by Insiders

10.16Mn

filed for Sep 2026

▲+28.30% QoQ

Shares Outstanding

20.82Mn

20,822,472 shares

Direct Holdings

1.02Mn

Indirect: 9.14Mn

Net Shares Traded (QoQ)

+2.24Mn

net buying in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Over the past year, SI insiders bought $214,873 of stock (14.4K shares) and sold $5.47 million (247.24K shares) on the open market.

Shoulder Innovations' open-market purchases in the past 12 months came from 3 insiders, and its sales from 3 insiders.
Among SI's insiders, Robert Joseph Ball (CEO & Executive Chairman) was the top open-market buyer in the past 12 months, with $140,401 of stock purchased (9.4K shares) and the latest purchase on March 13, 2026.
On the selling side, Gilde Healthcare Holding B.V. (10% owner) was the top open-market seller of Shoulder Innovations over the past 12 months, with $4.44 million sold (194.57K shares) and the latest sale on August 26, 2026.
The latest open-market trade on record is a sale of 10.18K shares for $187,706 by Robert Joseph Ball (CEO & Executive Chairman) on September 14, 2026.
Beyond open-market trades, insiders at Shoulder Innovations received 12.87K shares in stock awards, acquired 191.83K shares through option exercises and conversions, gave up 7.01K shares to cover taxes or exercise prices and gave away 2.5K shares as gifts in the last 12 months.
Per Business Quant data, Shoulder Innovations insiders hold 10.17Mn shares in total based on their latest Form 4 filings.
Of the 10.17Mn shares held by Shoulder Innovations insiders, 1.02Mn shares (10.04%) are held directly and 9.14Mn shares (89.96%) indirectly, through trusts, partnerships, family members and other entities.
The insider holdings in Shoulder Innovations belong to 13 insiders who have reported on Form 4 within the past two years.
Shoulder Innovations' top three insider holders by shares held are Casey M. Tansey (Director and 10% owner, 2.75Mn shares), Geoffrey B. Pardo (Director and 10% owner, 2.39Mn shares) and Gilde Healthcare Holding B.V. (10% owner, 2.19Mn shares).
The largest insider, Casey M. Tansey, holds 27.02% of SI's insider total.
Institutions held 40.02% of Shoulder Innovations' outstanding shares in their Q2 2026 13F filings, insiders about 48.82% based on their latest Form 4 filings, and other investors, including the public, the remaining 11.16%.
A total of 34 Form 4 filings with transactions in Shoulder Innovations stock were made over the past 12 months, by 10 insiders.
This summary of Shoulder Innovations insider activity covers Form 4 filings through October 6, 2026.

Form 4 Holdings

Insiders Holding SI

Insiders 13

Shares held 9.36Mn

Of outstanding 44.94%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Geoffrey B Pardo	Director, TenPercentOwner	7,666	2,380,482	2,388,148	25.5%	05 Aug, 2025
2	Healthcare Holding B.V. Gilde	TenPercentOwner	0	2,185,914	2,185,914	23.4%	28 Aug, 2026
3	Michael A Carusi	Director	7,666	1,885,136	1,892,802	20.2%	05 Aug, 2025
4	Associates Ii, Llc Lsv	Other	0	1,885,136	1,885,136	20.1%	05 Aug, 2025
5	Robert Joseph Ball	Ceo Executive Chairman	380,824	0	380,824	4.1%	14 Sep, 2026
6	Matthew Fraser Ahearn	Chief Operating Officer	244,176	0	244,176	2.6%	18 Aug, 2026
7	David Lawrence Blue	Officer	139,372	0	139,372	1.5%	08 Jan, 2026
8	Jeffrey S. Points	Chief Financial Officer	70,785	0	70,785	0.8%	17 Mar, 2026
9	Paul Buckman	Director	65,025	0	65,025	0.7%	06 Oct, 2026
10	Casey M Tansey	Director, TenPercentOwner	53,445	0	53,445	0.6%	06 Oct, 2026
11	Kevin K. Sidow	Director	25,948	0	25,948	0.3%	06 Oct, 2026
12	Richard Buchholz	Director	18,712	0	18,712	0.2%	29 Jun, 2026
13	Andrew Hykes	Director	7,438	0	7,438	0.1%	06 Oct, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

129 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
05 Oct, 2026	Kevin K. Sidow	Director	Acquired A	892	$19.60	$17.48K	25,948	Direct
05 Oct, 2026	Andrew Hykes	Director	Acquired A	669	$19.60	$13.11K	7,438	Direct
05 Oct, 2026	Paul Buckman	Director	Acquired A	1,275	$19.60	$24.99K	65,025	Direct
05 Oct, 2026	Casey M Tansey	Director, TenPercentOwner	Acquired A	733	$19.60	$14.37K	53,445	Direct
14 Sep, 2026	Robert Joseph Ball	Ceo Executive Chairman	Acquired M	89,233	$2.10	$187.28K	390,999	Direct
14 Sep, 2026	Robert Joseph Ball	Ceo Executive Chairman	Disposed S	10,175	$18.45	$187.71K	380,824	Direct
14 Sep, 2026	Robert Joseph Ball	Ceo Executive Chairman	Disposed M	89,233	$0.00	$0	92,143	Direct
26 Aug, 2026	Healthcare Holding B.V. Gilde	TenPercentOwner	Disposed S	1,196	$22.60	$27.03K	2,185,914	Indirect
20 Aug, 2026	Healthcare Holding B.V. Gilde	TenPercentOwner	Disposed S	3,900	$22.60	$88.14K	2,208,307	Indirect
21 Aug, 2026	Healthcare Holding B.V. Gilde	TenPercentOwner	Disposed S	20,516	$22.61	$463.87K	2,187,791	Indirect
24 Aug, 2026	Healthcare Holding B.V. Gilde	TenPercentOwner	Disposed S	681	$22.62	$15.40K	2,187,110	Indirect
14 Aug, 2026	Matthew Fraser Ahearn	Chief Operating Officer	Disposed G	2,500	$0.00	$0	266,676	Direct
17 Aug, 2026	Matthew Fraser Ahearn	Chief Operating Officer	Disposed S	8,314	$20.10	$167.10K	258,362	Direct
18 Aug, 2026	Matthew Fraser Ahearn	Chief Operating Officer	Disposed S	12,586	$20.94	$263.49K	245,776	Direct
18 Aug, 2026	Matthew Fraser Ahearn	Chief Operating Officer	Disposed S	1,600	$21.38	$34.21K	244,176	Direct
05 Aug, 2026	Healthcare Holding B.V. Gilde	TenPercentOwner	Disposed S	7,338	$22.64	$166.13K	2,214,302	Indirect
06 Aug, 2026	Healthcare Holding B.V. Gilde	TenPercentOwner	Disposed S	2,095	$22.60	$47.35K	2,212,207	Indirect
03 Aug, 2026	Healthcare Holding B.V. Gilde	TenPercentOwner	Disposed S	10,751	$22.71	$244.16K	2,321,452	Indirect
04 Aug, 2026	Healthcare Holding B.V. Gilde	TenPercentOwner	Disposed S	99,812	$22.77	$2.27Mn	2,221,640	Indirect
30 Jul, 2026	Healthcare Holding B.V. Gilde	TenPercentOwner	Disposed S	28,245	$23.36	$659.80K	2,352,237	Indirect

Showing 1 to 20 of 129 transactions