Stock

KOSS

KOSS CORPORATION

Latest close $3.960 of 27 marquee funds currently hold1 CUSIP mapped

Current holders

27 funds tracked

Ever held

Current + past

New this quarter

Exited this quarter

Marquee-fund ownership over time

Feb 14, 2025May 15, 2025Nov 14, 2025Feb 17, 2026

Now

Past holders

Funds that exited at some point

Fund	Last entry	Exited	Entry → Exit	Return
Two Sigma Investments	Q4 2025	Q1 2026	→ $4.15	-14%
Citadel Advisors	Q1 2025	Q2 2025	→ $5.04	-23%

Insider activity

Form 4 — officers, directors, 10%+ owners

Filed within two business days of each transaction by anyone with material insider status at KOSS CORP. Pair with the holders table above as a sanity check: heavy insider buying alongside marquee-fund accumulation is the strongest accumulation signal; heavy insider selling alongside fund exits is the strongest distribution signal.

Filings · last 30d

Filings · last 90d

Total on file

257

Recent SEC buffer

Most recent

May 8, 2026

30d / 90d windows measured from May 8, 2026 — the most recent Form 4 on file — not from today.

Showing 15 of 257 recent Form 4 filings. Browse all on EDGAR ↗

Fundamentals

XBRL · KOSS CORPORATION

Annual figures sourced directly from KOSS CORPORATION's 10-K / 10-Q filings via SEC EDGAR XBRL. Latest fiscal year and the year-over-year change, with up to ten years of history.

Revenue

$12.62M

FY2025+3% YoY

Net income

-$874.83K

FY2025+8% YoY

EPS (diluted)

$-0.0900

FY2025+10% YoY

Free cash flow(?)

-$705.63K

FY2025-8% YoY

Recent SEC filings

10-K · 10-Q · 8-K · 13D/G · proxy

The most recent material filings for KOSS CORP — earnings, material events, ownership disclosures, proxy statements. Form 4 insider activity is shown in the panel above.

Trade history

Every open→close lifecycle across tracked funds

Fund	Open date	Close date	Open price	Close price / current	Return
Two Sigma Investments	Q4 2025	Q1 2026	$4.82	$4.15	-14%
Citadel Advisors	Q1 2025	Q2 2025	$6.56	$5.04	-23%

Caveats

Covers only the 27 marquee funds tracked here, not the full institutional universe. A “0 holders” reading does not mean unowned.
Heavy funds (Renaissance Technologies, Citadel Advisors, Soros Fund Management, Two Sigma Investments, D.E. Shaw, AQR Capital Management, Millennium Management, Point72 Asset Management) use 8-quarter snapshots, so their pre-2024 history is missing.
“Current” reflects each fund's most recent 13F — filings lag the actual trade by up to 45 days; positions shown may have changed since.
Cost = price at the entry filing date. Re-entered positions show the most recent open lot.
Options, ADRs, and unmapped CUSIPs are excluded from the follower-backtest pipeline that produces these snapshots, so certain holding types won't appear here.