Paratek Pharmaceuticals, Inc.
Paratek Pharmaceuticals, Inc. (PRTK) Insider Trading
Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.
SEC EDGAR · FMP · PRTK · as of Jun 9, 2026
Activity summary
Buy transactions
5
P-Purchase only
Sell transactions
30
12 Months
Buy/Sell ratio
0.17
Buy/Sell (by trades)
Overall sentiment
Paratek Pharmaceuticals, Inc. insiders have been primarily selling shares over the past 12 Months. Selling activity is often driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment toward the company.
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only
As of Jun 9, 2026
PRTK insider buying and selling by quarter
PRTK insider selling · PRTK insider buying stocks · quarterly insider activity
Mobile shows last 4Q · Desktop shows full 8Q
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters
As of Jun 9, 2026
Recent insider transactions
PRTK executive sell shares · PRTK board member insider trading · PRTK insider trading SEC filing
Scroll horizontally to see all columns
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| Sep 21, 2023 | Baylor-Henry Minnie Director | Other | 32,800 | $71K | Form 4 |
| Sep 21, 2023 | Baylor-Henry Minnie Director | Other | 26,400 | — | Form 4 |
| Sep 21, 2023 | Hoffmann Rolf K Director | Other | 64,000 | $138K | Form 4 |
| Sep 21, 2023 | Hoffmann Rolf K Director | Other | 20,000 | — | Form 4 |
| Sep 21, 2023 | Brenner Randall B. Chief Development & Regulatory | Other | 329,709 | $709K | Form 4 |
| Sep 21, 2023 | Brenner Randall B. Chief Development & Regulatory | Other | 85,500 | — | Form 4 |
| Sep 21, 2023 | Peterson Kristine Director | Other | 59,000 | $127K | Form 4 |
| Sep 21, 2023 | Peterson Kristine Director | Other | 20,000 | — | Form 4 |
| Sep 21, 2023 | Stein Jeffrey Director | Other | 48,625 | $105K | Form 4 |
| Sep 21, 2023 | Stein Jeffrey Director | Other | 20,000 | — | Form 4 |
| Sep 21, 2023 | Haskel William M. CLO, General Counsel & Sec. | Other | 357,774 | $769K | Form 4 |
| Sep 21, 2023 | Haskel William M. CLO, General Counsel & Sec. | Other | 89,250 | — | Form 4 |
| Feb 2, 2018 | BIGHAM MICHAEL Exec. Chairman of the Board · Director | Option | 23,255 | $100K | Form 4 |
| Sep 21, 2023 | BIGHAM MICHAEL Exec. Chairman of the Board · Director | Other | 1,129,282 | $960K | Form 4 |
| Sep 21, 2023 | BIGHAM MICHAEL Exec. Chairman of the Board · Director | Other | 228,750 | — | Form 4 |
| Sep 21, 2023 | Franson Timothy R Director | Other | 52,000 | $112K | Form 4 |
| Sep 21, 2023 | Franson Timothy R Director | Other | 20,000 | — | Form 4 |
| Sep 21, 2023 | Woodrow Adam President & Chief Commercial | Other | 622,284 | $529K | Form 4 |
| Sep 21, 2023 | Woodrow Adam President & Chief Commercial | Other | 126,750 | — | Form 4 |
| Sep 21, 2023 | Loh Evan CEO · Director | Other | 1,069,231 | $2.30M⚡ | Form 4 |
| Sep 21, 2023 | Loh Evan CEO · Director | Other | 258,750 | — | Form 4 |
| Sep 21, 2023 | Dietz Thomas John Director | Other | 49,250 | $42K | Form 4 |
| Sep 21, 2023 | Dietz Thomas John Director | Other | 20,000 | — | Form 4 |
| Sep 21, 2023 | Radie Robert S Director | Other | 53,000 | $45K | Form 4 |
| Sep 21, 2023 | Radie Robert S Director | Other | 20,000 | — | Form 4 |
Brenner Randall B.
Chief Development & Regulatory
Date
Sep 21
Shares
329,709
Price
$2.15
Value
$709K
Brenner Randall B.
Chief Development & Regulatory
Date
Sep 21
Shares
85,500
Price
—
Value
—
Haskel William M.
CLO, General Counsel & Sec.
Date
Sep 21
Shares
357,774
Price
$2.15
Value
$769K
Haskel William M.
CLO, General Counsel & Sec.
Date
Sep 21
Shares
89,250
Price
—
Value
—
BIGHAM MICHAEL
Exec. Chairman of the Board · Director
Date
Feb 2
Shares
23,255
Price
$4.30
Value
$100K
BIGHAM MICHAEL
Exec. Chairman of the Board · Director
Date
Sep 21
Shares
1,129,282
Price
$0.85
Value
$960K
BIGHAM MICHAEL
Exec. Chairman of the Board · Director
Date
Sep 21
Shares
228,750
Price
—
Value
—
Woodrow Adam
President & Chief Commercial
Date
Sep 21
Shares
622,284
Price
$0.85
Value
$529K
Woodrow Adam
President & Chief Commercial
Date
Sep 21
Shares
126,750
Price
—
Value
—
⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar
▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —
About PRTK insider trading
PRTK insider trades
Paratek Pharmaceuticals, Inc. (PRTK) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including PRTK. Over the past 12 months, 0 insiders have filed transactions with the SEC. PRTK insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.
For Paratek Pharmaceuticals, Inc.'s institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →
Frequently asked questions
PRTK insider trading · 5 questionsThe insiders of Paratek Pharmaceuticals, Inc. (PRTK) include executives and directors such as PRTK, among others. Over the past 12 months, 0 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.
▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 9, 2026