YSS York Space Systems Inc.

NYSE
$7.88

York Space Systems Inc. (YSS) 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 YSS's own trailing one-year pace, with 0% of sale value under a prearranged plan.
Cluster activity 0 buyers in the last 30 days 0 buyers in the last 90 days 1 seller in the last 90 days
Insiders buying
3
3 transactions
Insiders selling
1
14 transactions
Purchases
$25.7M
756,911 shares
Sales
$28.6M
1,991,818 shares
Net activity
-$2.9M
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 $28.6M 14 transactions · 1,991,818 shares

Largest single sale: $7.3M.

Where they traded

Buy Sell Dot area is proportional to transaction value.

Last open-market purchase: January 30, 2026 , by Erwin Tami A. .

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
BlackRock Portfolio Management LLC 10% Owner Sell 200,170 $10.99 $2.2M 16,517,115 −1.2% of holding
BlackRock Portfolio Management LLC 10% Owner Sell 201,504 $11.60 $2.3M 16,717,285 −1.2% of holding
BlackRock Portfolio Management LLC 4 fills 10% Owner Sell 255,992 $13.66 $3.5M 16,943,178 −1.5% of holding
BlackRock Portfolio Management LLC 4 fills 10% Owner Sell 1,080,611 $15.50 $16.7M 17,515,650 −5.8% of holding
BlackRock Portfolio Management LLC 10% Owner Sell 13,754 $15.03 $206.7K 17,593,393 −0.1% of holding
BlackRock Portfolio Management LLC 10% Owner Sell 35,574 $15.14 $538.6K 17,607,147 −0.2% of holding
BlackRock Portfolio Management LLC 10% Owner Sell 140,823 $15.18 $2.1M 17,642,721 −0.8% of holding
BlackRock Portfolio Management LLC 10% Owner Sell 63,390 $15.31 $970.5K 17,783,544 −0.4% of holding
BlackRock Portfolio Management LLC 10% Owner Buy 752,500 $34.00 $25.6M 17,846,934
Erwin Tami A. Director Buy 2,941 $34.00 $100.0K 79,984
Letarte Tyler Director Buy 1,470 $34.00 $50.0K 1,470

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.