SPRO Spero Therapeutics, Inc.

NASDAQ
$1.23

Spero Therapeutics, Inc. (SPRO) 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 SPRO'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 0 sellers in the last 90 days
Insiders buying
0
0 transactions
Insiders selling
2
9 transactions
Purchases
$0
0 shares
Sales
$552.0K
237,107 shares
Net activity
-$552.0K
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 $552.0K 9 transactions · 237,107 shares

Largest single sale: $119.9K.

Where they traded

Buy Sell Dot area is proportional to transaction value.

No open-market insider purchase on record.

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
Rajavelu Esther See Remarks Sell 25,240 $2.51 $63.4K 986,851 −2.5% of holding
Rajavelu Esther 2 fills See Remarks Sell 87,917 $2.36 $207.5K 1,062,907 −7.6% of holding
Keutzer Timothy Chief Operating Officer Sell 18,652 $2.36 $44.0K 742,506 −2.5% of holding
Keutzer Timothy Chief Operating Officer Sell 3,471 $2.24 $7.8K 761,158 −0.5% of holding
Keutzer Timothy Chief Operating Officer Sell 24,224 $2.14 $51.8K 764,629 −3.1% of holding
Keutzer Timothy Chief Operating Officer Sell 18,891 $2.20 $41.6K 788,853 −2.3% of holding
Rajavelu Esther See Remarks Sell 18,442 $2.20 $40.6K 1,100,008 −1.6% of holding
Rajavelu Esther See Remarks Sell 40,270 $2.37 $95.4K 869,450 −4.4% 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.