Company · Ownership research

SHOULDER INNOVATIONS, INC. SI

CIK 0001699350

Form 4 transactions dated Sep 1, 2023 to Sep 25, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

Insider filings on file run through 2026-08-28.

Insider purchases & sales

Purchased: $12.04M
Sold: $5.28M

Sep 1, 2023 – Aug 28, 2026
Available records · partial months are marked ·

202610 of 17 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2026-08-26	Gilde Healthcare Holding B.V. 10% owner	Sale	$27.03K 1,196 shares sold	0.05% sold Indirect holding	▾
2026-08-24	Gilde Healthcare Holding B.V. 10% owner	Sale	$15.40K 681 shares sold	0.03% sold Indirect holding	▾
2026-08-21	Gilde Healthcare Holding B.V. 10% owner	Sale	$463.87K 20,516 shares sold	0.93% sold Indirect holding	▾
2026-08-20	Gilde Healthcare Holding B.V. 10% owner	Sale	$88.14K 3,900 shares sold	0.18% sold Indirect holding	▾
2026-08-18	Ahearn Matthew Fraser Chief Operating Officer · Director	Sale10b5-1 footnote	$297.70K 14,186 shares sold	5.49% sold Direct holding	▾
2026-08-17	Ahearn Matthew Fraser Chief Operating Officer · Director	Sale10b5-1 footnote	$167.10K 8,314 shares sold	3.12% sold Direct holding	▾
2026-08-06	Gilde Healthcare Holding B.V. 10% owner	Sale	$47.35K 2,095 shares sold	0.09% sold Indirect holding	▾
2026-08-05	Gilde Healthcare Holding B.V. 10% owner	Sale	$166.13K 7,338 shares sold	0.33% sold Indirect holding	▾
2026-08-04	Gilde Healthcare Holding B.V. 10% owner	Sale	$2.27M 99,812 shares sold	4.30% sold Indirect holding	▾
2026-08-03	Gilde Healthcare Holding B.V. 10% owner	Sale	$244.16K 10,751 shares sold	0.46% sold Indirect holding	▾

Showing 17 / 17 record groups in 2026. The complete set is available through the API.

SHOULDER INNOVATIONS, INC. · SI

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 17 of 17 purchase / sale groups and 24 of 24 other groups; the totals and the monthly series cover the whole window.

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{"ticker":"SI","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.