ATEC Alphatec Holdings, Inc.

NASDAQ
$7.35

Alphatec Holdings, Inc. (ATEC) 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 Bullish Insiders bought more than they sold over this window — uncommon at any size.
Cluster activity 2 buyers in the last 30 days 3 buyers in the last 90 days 0 sellers in the last 90 days
Insiders buying
3
3 transactions
Insiders selling
2
2 transactions
Purchases
$1.7M
210,000 shares
Sales
$127.3K
14,218 shares
Net activity
$1.5M
purchases less sales

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

10b5-1 plan sales $127.3K 2 transactions · 14,218 shares
Discretionary sales $0 0 transactions · 0 shares

Largest single sale: $78.8K.

Where they traded

Buy Sell Dot area is proportional to transaction value.

Last open-market purchase: November 10, 2026 , by Valentine Keith .

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
Valentine Keith Director Buy 35,000 $6.93 $242.6K 299,283
Demski David M Director Buy 10b5-1 60,000 $6.81 $408.6K 491,635
Miles Patrick CEO Buy 115,000 $8.81 $1.0M 5,893,551
Marshall Tyson Eliot GENERAL COUNSEL & CORP. SEC. Sell 10b5-1 8,168 $9.65 $78.8K 630,398 −1.3% of holding
MCGINNIS KAREN K Director Sell 10b5-1 6,050 $8.01 $48.5K 94,671 −6% of holding

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.