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MK

Michael J. JR Koss

KOSS
VP - MARKETING & PRODUCT · KOSS CORP · CIK 0001680965
FILING MIX · LIFETIME38%/62%
BUYS
14
SELLS
23
TOTAL VALUE
$6.62M
COMPANIES
1
ACTIVE SINCE
Jul 2020
HOLDINGS NOW
100,000
AVG SELL PX
$27.40
TRADE KIND
SHOWING 37 / 37
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
12 backtested trades · 8 horizons · 2 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Michael J. JR Koss, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d12+75.00%-19.64%+0.69%-20.33%-20.07%—
14d12+58.33%-17.75%+2.09%-19.84%-5.95%—
30d12+83.33%-20.26%+2.00%-22.26%-14.24%—
60d12+75.00%-14.00%+6.19%-20.20%-15.58%—
90d12+83.33%-20.26%+8.70%-28.96%-26.74%—
180d12+100.00%-34.20%+11.96%-46.16%-55.92%—
1y12+100.00%-59.24%+11.69%-70.92%-80.18%—
2y12(2 pending)+100.00%-81.39%+7.91%-89.31%-87.91%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
KOSS · 100,000 shares · as of May 6, 2026
034,26368,526102,789137,052202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 14 buys / 23 sellsCOVERAGE · 24 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
KOSS
KOSS CORP
PURCHASEGRANT
Stock grant
100,000——100,000May 6, 2026May 8, 2026 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
24,643$4.78$117.8K26,000Jun 13, 2025Jun 17, 2025 ↗View →
KOSS
KOSS CORP
PURCHASE
VP - Marketing & Product
24,643$1.90$46.8K50,643Jun 13, 2025Jun 17, 2025 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
24,643——34,357Jun 13, 2025Jun 17, 2025 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
6,000$4.91$29.5K26,000Jun 12, 2025Jun 17, 2025 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
6,000——59,000Jun 12, 2025Jun 17, 2025 ↗View →
KOSS
KOSS CORP
PURCHASE
VP - Marketing & Product
6,000$1.90$11.4K32,000Jun 12, 2025Jun 17, 2025 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
9,089——20,911Sep 15, 2021Sep 17, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
24,089$17.74$427.3K26,000Sep 15, 2021Sep 17, 2021 ↗View →
KOSS
KOSS CORP
PURCHASE
VP - Marketing & Product
15,000$2.92$43.8K41,000Sep 15, 2021Sep 17, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
15,000——15,000Sep 15, 2021Sep 17, 2021 ↗View →
KOSS
KOSS CORP
PURCHASE
VP - Marketing & Product
9,089$2.17$19.7K50,089Sep 15, 2021Sep 17, 2021 ↗View →
KOSS
KOSS CORP
PURCHASE
VP - Marketing & Product
15,000$1.90$28.5K56,000Aug 25, 2021Aug 26, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
15,000——65,000Aug 25, 2021Aug 26, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
15,000——0Aug 25, 2021Aug 26, 2021 ↗View →
KOSS
KOSS CORP
PURCHASE
VP - Marketing & Product
15,000$1.95$29.3K41,000Aug 25, 2021Aug 26, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
30,000$18.01$540.3K26,000Aug 25, 2021Aug 26, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
10,000$24.30$243.0K26,000Jun 15, 2021Jun 16, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
10,000$40.51$405.1K36,000Jun 2, 2021Jun 3, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
4,000$31.25$125.0K57,000Feb 25, 2021Feb 26, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
15,000——45,000Feb 25, 2021Feb 26, 2021 ↗View →
KOSS
KOSS CORP
PURCHASE
VP - Marketing & Product
15,000$2.17$32.5K61,000Feb 25, 2021Feb 26, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
11,000$32.89$361.8K46,000Feb 25, 2021Feb 26, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
13,948$25.98$362.4K46,000Feb 2, 2021Feb 3, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
13,948——30,000Feb 2, 2021Feb 3, 2021 ↗View →
KOSS
KOSS CORP
PURCHASE
VP - Marketing & Product
13,948$2.92$40.7K59,948Feb 2, 2021Feb 3, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
45,000——15,000Feb 1, 2021Feb 3, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
16,052——43,948Feb 1, 2021Feb 3, 2021 ↗View →
KOSS
KOSS CORP
PURCHASE
VP - Marketing & Product
30,000$2.42$72.6K76,000Feb 1, 2021Feb 3, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
30,000——0Feb 1, 2021Feb 3, 2021 ↗View →
KOSS
KOSS CORP
PURCHASE
VP - Marketing & Product
45,000$1.95$87.8K121,000Feb 1, 2021Feb 3, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
60,000$40.58$2.43M77,052Feb 1, 2021Feb 3, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
5,000$39.40$197.0K72,052Feb 1, 2021Feb 3, 2021 ↗View →
KOSS
KOSS CORP
PURCHASE
VP - Marketing & Product
16,052$2.92$46.9K137,052Feb 1, 2021Feb 3, 2021 ↗View →
KOSS
KOSS CORP
SALE
VP - Marketing & Product
26,052$35.07$913.6K46,000Feb 1, 2021Feb 3, 2021 ↗View →
KOSS
KOSS CORP
PURCHASE
VP - Marketing & Product
44,000——46,000Oct 2, 2020Oct 6, 2020 ↗View →
KOSS
KOSS CORP
PURCHASEGRANT
Stock grant
80,000——80,000Jul 22, 2020Jul 23, 2020 ↗View →
Other insiders · KOSS
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About this filer
CIK 0001680965
ROLE
VP - Marketing & Product
PRIMARY
KOSS
COMPANIES
1
ACTIVE SINCE
Jul 2020
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