TNON Tenon Medical Inc

NASDAQ
$3.13

Tenon Medical Inc (TNON) Insider Activity

What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.

30D 90D 6M 1Y
Insider signal In line Selling ran in line with TNON's own trailing one-year pace, with 0% of sale value under a prearranged plan.
Cluster activity 1 buyer in the last 30 days 1 buyer in the last 90 days 1 seller in the last 90 days
Insiders buying
4
12 transactions
Insiders selling
1
9 transactions
Purchases
$500.2K
270,022 shares
Sales
$605.7K
136,599 shares
Net activity
-$105.4K
purchases less sales

How much of that selling was preplanned? 0% planned / 100% discretionary

10b5-1 plan sales $0 0 transactions · 0 shares
Discretionary sales $605.7K 9 transactions · 136,599 shares

Largest single sale: $364.6K.

Where they traded

Buy Sell Dot area is proportional to transaction value.

Last open-market purchase: September 10, 2026 , by HRT FINANCIAL LP .

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
HRT FINANCIAL LP 10% Owner Sell 65,582 $5.56 $364.6K 15,839 −80.5% of holding
HRT FINANCIAL LP 3 fills 10% Owner Buy 67,925 $3.63 $246.3K 15,839
HRT FINANCIAL LP 2 fills 10% Owner Sell 60,343 $2.88 $174.0K 18,182 −76.8% of holding
HRT FINANCIAL LP 10% Owner Buy 39,508 $3.40 $134.3K 18,182
HRT FINANCIAL LP 10% Owner Buy 707 $3.34 $2.4K 2,653
HRT FINANCIAL LP 10% Owner Sell 1,506 $3.70 $5.6K 1,946 −43.6% of holding
HRT FINANCIAL LP 10% Owner Buy 1,658 $3.98 $6.6K 3,452
HRT FINANCIAL LP 10% Owner Sell 450 $4.53 $2.0K 1,794 −20.1% of holding
HRT FINANCIAL LP 10% Owner Buy 1,790 $4.57 $8.2K 2,244
HRT FINANCIAL LP 10% Owner Sell 1,276 $4.66 $5.9K 454 −73.8% of holding
HRT FINANCIAL LP 2 fills 10% Owner Buy 18,357 $5.58 $102.5K 1,730
HRT FINANCIAL LP 2 fills 10% Owner Sell 7,023 $7.32 $51.4K 1,730 −80.2% of holding
HRT FINANCIAL LP 10% Owner Sell 419 $4.96 $2.1K 9,604 −4.2% of holding
FOSTER STEVEN M CEO and President Buy 19,455 $0.00 $0 22,878
Geist Wyatt D. Chief Innovation Officer Buy 19,455 $0.00 $0 157,569
Grawey Nathaniel A. Chief Commercial Officer Buy 101,167 $0.00 $0 239,281

Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.