Company · Ownership research

BLACKLINE, INC. BL

CIK 0001666134

Form 4 transactions dated Sep 1, 2023 to Sep 23, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 61 rows; the complete set is available through the API.

Insider filings on file run through 2026-09-04.

Insider purchases & sales

Purchased: $1.08M
Sold: $21.80M

Sep 1, 2023 – Sep 4, 2026
Available records · partial months are marked ·

20266 of 6 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2026-08-27	Stalick Michelle D Chief Accounting Officer	Sale	$26.25K 780 shares sold	2.20% sold Direct holding	▾
2026-08-24	Tucker Therese Director	Sale	$2.24M 70,000 shares sold	15.50% sold Direct holding	▾
2026-06-05	Yamamoto Mika Director	Sale	$85.43K 3,000 shares sold	15.23% sold Direct holding	▾
2026-06-01	Stalick Michelle D Chief Accounting Officer	Sale	$24.13K 780 shares sold	2.10% sold Direct holding	▾
2026-05-21	HUGHES GREGORY Director	Sale10b5-1 footnote	$49.52K 1,637 shares sold	17.43% sold Direct holding	▾
2026-05-18	Stalick Michelle D Chief Accounting Officer	Sale	$13.89K 459 shares sold	1.19% sold Direct holding	▾

Showing 6 / 6 record groups in 2026. The complete set is available through the API.

BLACKLINE, INC. · BL

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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 6 of 6 purchase / sale groups and 30 of 61 other groups; the totals and the monthly series cover the whole window.

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

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Sources, coverage & how to read this data

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.