Company · Ownership research

BIOLIFE SOLUTIONS INC BLFS

CIK 0000834365

Form 4 transactions dated Sep 1, 2023 to Sep 26, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 103 rows; the complete set is available through the API.

Insider filings on file run through 2026-09-10.

Some filings are submitted jointly by several insiders. The SEC form does not apportion the reported figures between them, so results include every joint filer.

Insider purchases & sales

Purchased: $10.37M
Sold: —

Sep 1, 2023 – Sep 10, 2026
Available records · partial months are marked ·

202510 of 30 preview events · 103 available in 2025

Date	Insider	Activity	Trade value (USD)	% of prior holding
2025-12-15	Aebersold Sarah Chief Human Resources Officer	Sale	$17.44K 713 shares sold	0.93% sold Direct holding	▾
2025-12-15	DuRoss Amy Director	Sale	$49.20K 2,000 shares sold	9.67% sold Direct holding	▾
2025-12-09	Mathew Aby J. EVP & Chief Scientific Officer	Sale10b5-1 footnote	$15.86K 631 shares sold	0.18% sold Direct holding	▾
2025-12-09	Wichterman Troy Chief Financial Officer	Sale10b5-1 footnote	$25.96K 1,033 shares sold	0.68% sold Direct holding	▾
2025-12-09	Aebersold Sarah Chief Human Resources Officer	Sale10b5-1 footnote	$5.86K 233 shares sold	0.30% sold Direct holding	▾
2025-12-09	Berard Todd Chief Marketing Officer	Sale10b5-1 footnote	$9.00K 358 shares sold	0.27% sold Direct holding	▾
2025-12-09	Foster Karen A. Chief Quality and Operations	Sale10b5-1 footnote	$13.04K 519 shares sold	0.27% sold Direct holding	▾
2025-12-04	Wichterman Troy Chief Financial Officer	Sale	$771.60K 30,000 shares sold	16.41% sold Direct holding	▾
2025-11-26	DuRoss Amy Director	Sale	$54.00K 2,000 shares sold	8.82% sold Direct holding	▾
2025-11-25	DuRoss Amy Director	Sale	$54.00K 2,000 shares sold	8.10% sold Direct holding	▾

Showing 30 / 103 record groups in 2025. The complete set is available through the API.

BIOLIFE SOLUTIONS INC · BLFS

Follow the people behind the trades.

Sign in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and reach other datasets through the Akkru API.

Download CSV
Earlier filings
Advanced screening & filtering
API & AI access

Already have an account?

＋ New accounts get free API credits to explore data beyond ownership filings.

For AI agents & developers

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 30 of 103 purchase / sale groups and 14 of 14 other groups; the totals and the monthly series cover the whole window.

Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP.

MCP  https://api.akkrudata.ai/mcp

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

Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.

MCP endpoint: https://api.akkrudata.ai/mcp
API / MCP documentation: /documents
llms.txt: /llms.txt

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.