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Delisting risk

BLIN · NASDAQ · Software - Infrastructure

Bridgeline Digital (BLIN)

Builds e-commerce search, SEO, and digital-experience software.

$0.9800

At close+0.01 (+0.52%)

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Breakdown13F · 13D/G · Form 4

Institutions17 holders · as of Mar 31, 2026	13.64%	1.72M shares
Insiders8 holders · as of Mar 16, 2026	39.70%	5.00M shares
Otherremainder	46.66%	5.88M shares

12.60M company shares as of Sep 3, 2026 · institutions as of Mar 31, 2026 · holders as of their latest filing

Top shareholders13F · 13D/G · Form 4

Holder	Stake	Shares	Evidence
Roger E. Kahn^1,2Insiderdirector, 10 percent owner, officer: President and CEO	21.54%	2.65M	13Dfiled Mar 11, 2026 ↗
Bard Associates IncInstitution	8.55%	1.08M	13Fas of Mar 31, 2026
Per A. JacobsenInsider	6.71%	845,000	13Gfiled Nov 25, 2024 ↗
Roger “Ari” KahnInsider	5.90%	743,892	13Dfiled Aug 30, 2022 ↗
The Vanguard GroupInstitution	4.21%	529,971	13D/Gfiled Feb 13, 2024 ↗
Michael KetslakhInsiderdirector	3.64%	458,722	Form 4filed Mar 16, 2026 ↗
Renaissance Technologies LLCInstitution	1.26%	158,729	13Fas of Mar 31, 2026
Geode Capital Management, LLCInstitution	1.00%	126,581	13Fas of Mar 31, 2026
Michael N. TaglichInsiderdirector	0.66%	82,831	Form 4filed Sep 3, 2024 ↗
Lido Advisors, LLCInstitution	0.63%	78,973	13Fas of Mar 31, 2026
Brandon RossInsiderdirector	0.62%	78,265	Form 4filed Mar 16, 2026 ↗
Vanguard Capital Management LLCInstitution	0.60%	76,110	13Fas of Mar 31, 2026
Citadel Advisors LLCInstitution	0.45%	56,085	13Fas of Mar 31, 2026
Kenneth GalaznikInsiderdirector	0.34%	43,232	Form 4filed Mar 16, 2026 ↗
Joni KahnInsiderdirector	0.29%	36,036	Form 4filed Mar 16, 2026 ↗
Vanguard Fiduciary Trust CoInstitution	0.28%	34,680	13Fas of Mar 31, 2026
XTX Topco LtdInstitution	0.19%	23,825	13Fas of Mar 31, 2026
Susquehanna International Group, LLPInstitution	0.18%	23,049	13Fas of Mar 31, 2026
LPL Financial LLCInstitution	0.15%	19,010	13Fas of Mar 31, 2026
State Street CorpInstitution	0.13%	16,200	13Fas of Mar 31, 2026
Northern Trust CorpInstitution	0.09%	11,551	13Fas of Mar 31, 2026
Schonfeld Strategic Advisors LLCInstitution	0.08%	10,226	13Fas of Mar 31, 2026
Tower Research Capital LLC (TRC)Institution	0.04%	4,516	13Fas of Mar 31, 2026
Citigroup IncInstitution	0.01%	646	13Fas of Mar 31, 2026
TD Waterhouse Canada Inc.Institution	0.00%	200	13Fas of Mar 31, 2026

Roger E. Kahn's transaction reports restate only vehicles that traded; the 2026 ownership statement (2.65M) plus the 64.3K net shares acquired since is used instead.
Roger E. Kahn reports a block also reported by another filer; it is counted once, under that filer.

13F — a manager's quarterly holdings · 13D/13G — an ownership statement filed at 5% or more · Form 4 — an insider's transaction report

Institutions13F, as of Mar 31, 2026

17 holders · 1.72M shares · 4 new positions · 7 increased · 8 reduced · 5 closed

Holder	Shares	% outstanding	Chg q/q	Filed
Bard Associates Inc	1.08M	8.55%	−81.6K	May 8, 2026
Renaissance Technologies LLC	158.7K	1.26%	+12.6K	May 14, 2026
Geode Capital Management, LLC	126.6K	1.00%	+539	May 15, 2026
Lido Advisors, LLC	79.0K	0.63%	+21.4K	May 13, 2026
Vanguard Capital Management LLC	76.1K	0.60%	+76.1Knew	May 15, 2026
Citadel Advisors LLC	56.1K	0.45%	−61.8K	May 15, 2026
Vanguard Fiduciary Trust Co	34.7K	0.28%	+34.7Knew	May 8, 2026
XTX Topco Ltd	23.8K	0.19%	−2.6K	May 15, 2026

Ownership statements13D/G · 5% or more, as filed

Holder	% of class	Shares	Form	Filed
Kahn Roger E.	19.60%	2.65M	13D	Feb 3, 2026 ↗
Bard Associates Inc	9.70%	1.09M	13G	Feb 13, 2026 ↗
Per A. Jacobsen	8.11%	845.0K	13G	Nov 25, 2024 ↗

Insider tradesForm 4

Latest trades

Date	Insider	Type	Shares	Avg price	Owned after
Mar 10, 2026	Roger E. Kahndirector, 10 percent owner, officer: President and CEO	Purchase	10,000	$0.9300	1,773,736
Mar 2, 2026	Michael Ketslakhdirector	Purchase	2,487	$0.8500	489,370
Mar 3, 2026	Michael Ketslakhdirector	Purchase	4,472	$0.8500	493,842
Feb 24, 2026	Michael Ketslakhdirector	Purchase	2,394	$0.8500	476,236
Feb 25, 2026	Michael Ketslakhdirector	Purchase	10,647	$0.8500	486,883
Feb 19, 2026	Michael Ketslakhdirector	Purchase	1,353	$0.8500	473,842
Feb 17, 2026	Roger E. Kahndirector, 10 percent owner, officer: President and CEO	Purchase	35,301	$0.7500	1,744,736
Feb 18, 2026	Roger E. Kahndirector, 10 percent owner, officer: President and CEO	Purchase	14,000	$0.8200	1,758,736
Feb 19, 2026	Roger E. Kahndirector, 10 percent owner, officer: President and CEO	Purchase	5,000	$0.8500	1,763,736

CongressHouse and Senate disclosures

Not reported.