Mark L. Baum
Activist
First SEC filing: April 7, 2025 · Latest: April 7, 2025
Insider at
Insider transactions
1 buys (P)
0 sells (S)
Net: $302,000
Avg return of open purchases vs now: 0.9%
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| May 14, 2026 | HROW | P | 10,000 | $30.20 | $302,000 | 2,996,130 Direct | +0.33% | Acquired | 0.9% (price as of 2026-10-02) |
| Dec. 12, 2025 | HROW | M | 180,000 | $3.95 | $711,000 | 3,066,124 Direct | +6.24% | Acquired | 671.6% (price as of 2026-10-02) |
| Dec. 12, 2025 | HROW | F | 79,994 | $47.06 | $3,764,518 | 2,986,130 Direct | -2.61% | Disposed | -35.2% (price as of 2026-10-02) |
| Dec. 12, 2025 | HROW | M | 180,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| July 21, 2025 | HROW | M | 600,000 | $7.87 | $4,722,000 | 3,199,462 Direct | +23.08% | Acquired | 287.3% (price as of 2026-10-02) |
| July 21, 2025 | HROW | F | 313,338 | $37.08 | $11,618,573 | 2,886,124 Direct | -9.79% | Disposed | -17.8% (price as of 2026-10-02) |
| July 1, 2025 | HROW | A | 889,500 | · | · | 889,500 Direct | · | Acquired | (price as of 2026-10-02) |
| April 7, 2025 | HROW | F | 300,363 | $23.09 | $6,935,382 | 2,599,462 Direct | -10.36% | Disposed | 32.0% (price as of 2026-10-02) |
| April 3, 2025 | HROW | M | 762,300 | · | · | 2,899,825 Direct | +35.66% | Acquired | (price as of 2026-10-02) |
| April 3, 2025 | HROW | M | 762,300 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| March 22, 2024 | HROW | P | 9,000 | $11.59 | $104,310 | 2,137,525 Direct | +0.42% | Acquired | 163.0% (price as of 2026-10-02) |
| Feb. 20, 2024 | HROW | M | 150,000 | $10.67 | $1,600,500 | 2,188,361 Direct | +7.36% | Acquired | 185.7% (price as of 2026-10-02) |
| Feb. 20, 2024 | HROW | M | 59,836 | $10.67 | $638,450 | 2,128,525 Direct | -2.73% | Disposed | 185.7% (price as of 2026-10-02) |
| Feb. 20, 2024 | HROW | M | 150,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Feb. 7, 2024 | HROW | M | 15,400 | $7.71 | $118,734 | 2,038,361 Direct | +0.76% | Acquired | 295.3% (price as of 2026-10-02) |
| Feb. 7, 2024 | HROW | M | 15,400 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Nov. 16, 2023 | HROW | P | 7,500 | $8.11 | $60,825 | 2,022,961 Direct | +0.37% | Acquired | 275.8% (price as of 2026-10-02) |
| Aug. 14, 2023 | HROW | P | 5,800 | $17.05 | $98,890 | 2,015,461 Direct | +0.29% | Acquired | 78.8% (price as of 2026-10-02) |
| July 18, 2023 | HROW | M | 762,300 | · | · | 2,309,629 Direct | +49.27% | Acquired | (price as of 2026-10-02) |
| July 18, 2023 | HROW | F | 299,968 | $18.23 | $5,468,417 | 2,009,661 Direct | -12.99% | Disposed | 67.2% (price as of 2026-10-02) |
| July 18, 2023 | HROW | M | 762,300 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| April 3, 2023 | HROW | M | 180,000 | $8.99 | $1,618,200 | 1,664,962 Direct | +12.12% | Acquired | 239.0% (price as of 2026-10-02) |
| April 3, 2023 | HROW | F | 117,633 | $20.97 | $2,466,764 | 1,547,329 Direct | -7.07% | Disposed | 45.4% (price as of 2026-10-02) |
| April 3, 2023 | HROW | M | 180,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| April 3, 2023 | HROW | A | 762,300 | · | · | 762,300 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 2, 2023 | HROW | M | 88,000 | · | · | 1,520,141 Direct | +6.14% | Acquired | (price as of 2026-10-02) |
| Jan. 2, 2023 | HROW | F | 35,179 | $14.76 | $519,242 | 1,484,962 Direct | -2.31% | Disposed | 106.5% (price as of 2026-10-02) |
| Jan. 2, 2023 | HROW | M | 88,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 22, 2022 | HROW | P | 25,000 | $13.39 | $334,750 | 1,432,141 Direct | +1.78% | Acquired | 127.6% (price as of 2026-10-02) |
| Jan. 20, 2022 | HROW | M | 125,000 | $2.40 | $300,000 | 1,478,547 Direct | +9.23% | Acquired | 1170.0% (price as of 2026-10-02) |
| Jan. 20, 2022 | HROW | F | 71,406 | $8.33 | $594,812 | 1,407,141 Direct | -4.83% | Disposed | 265.9% (price as of 2026-10-02) |
| Jan. 20, 2022 | HROW | M | 125,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| July 23, 2021 | HROW | A | 762,301 | · | · | 762,301 Direct | · | Acquired | (price as of 2026-10-02) |
| April 25, 2021 | HROW | M | 850,000 | · | · | 1,687,676 Direct | +101.47% | Acquired | (price as of 2026-10-02) |
| April 25, 2021 | HROW | F | 334,129 | $8.26 | $2,759,906 | 1,353,547 Direct | -19.80% | Disposed | 269.0% (price as of 2026-10-02) |
| April 25, 2021 | HROW | M | 850,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Feb. 25, 2021 | HROW | M | 200,000 | · | · | 837,676 Direct | +31.36% | Acquired | (price as of 2026-10-02) |
| Feb. 25, 2021 | HROW | M | 200,000 | · | · | 850,000 Direct | -19.05% | Disposed | (price as of 2026-10-02) |
| Feb. 19, 2021 | HROW | A | 150,000 | · | · | 150,000 Direct | · | Acquired | (price as of 2026-10-02) |
| June 4, 2020 | HROW | D | 600,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| June 4, 2020 | HROW | A | 600,000 | · | · | 600,000 Direct | · | Acquired | (price as of 2026-10-02) |
| March 12, 2020 | ETON | A | 27,400 | · | · | 27,400 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 2, 2020 | HROW | A | 217,500 | · | · | 217,500 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Jan. 2, 2020 | HROW | A | 88,000 | · | · | 88,000 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Jan. 2, 2020 | HROW | A | 217,500 | · | · | 217,500 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 2, 2020 | HROW | A | 88,000 | · | · | 88,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 22, 2019 | HROW | X | 156,000 | $1.79 | $279,240 | 598,126 Indirect | +35.28% | Acquired | 1602.8% (price as of 2026-10-02) |
| Nov. 22, 2019 | HROW | X | 156,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Feb. 20, 2019 | ETON | A | 12,500 | · | · | 12,500 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 19, 2019 | HROW | A | 150,000 | · | · | 150,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 15, 2018 | ETON | P | 10,000 | $6.00 | $60,000 | 10,000 Indirect | · | Acquired | 822.7% (price as of 2026-10-02) |
| Jan. 2, 2018 | HROW | A | 150,000 | · | · | 150,000 Direct | · | Acquired | (price as of 2026-10-02) |
| March 3, 2017 | IPWR | P | 7,800 | $2.54 | $19,812 | 7,800 Indirect | · | Acquired | -84.1% (price as of 2026-10-02) |
| March 3, 2017 | IPWR | P | 7,800 | $2.54 | $19,812 | 33,698 Indirect | +30.12% | Acquired | -84.1% (price as of 2026-10-02) |
| Feb. 1, 2017 | HROW | A | 160,000 | · | · | 160,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 3, 2017 | IPWR | A | 27,875 | · | · | 27,875 Direct | · | Acquired | (price as of 2026-10-02) |
| Dec. 19, 2016 | HROW | P | 156,000 | $1.79 | $279,240 | 325,835 Direct | +91.85% | Acquired | 1602.8% (price as of 2026-10-02) |
| Dec. 19, 2016 | HROW | M | 200,000 | $1.72 | $344,000 | 525,835 Direct | +61.38% | Acquired | 1672.1% (price as of 2026-10-02) |
| Dec. 19, 2016 | HROW | D | 83,709 | $1.72 | $143,979 | 442,126 Direct | -15.92% | Disposed | 1672.1% (price as of 2026-10-02) |
| Dec. 19, 2016 | HROW | P | 156,000 | $0.12 | $18,720 | 156,000 Direct | · | Acquired | 25300.0% (price as of 2026-10-02) |
| Dec. 19, 2016 | HROW | M | 200,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| April 25, 2016 | HROW | A | 1,050,000 | · | · | 1,050,000 Direct | · | Acquired | (price as of 2026-10-02) |
| April 25, 2016 | HROW | D | 1,050,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| April 1, 2016 | HROW | A | 180,000 | · | · | 180,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 4, 2016 | IPWR | A | 12,646 | · | · | 12,646 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 13, 2015 | IPWR | S | 29,063 | $7.54 | $219,135 | 25,898 Direct | -52.88% | Disposed | -94.6% (price as of 2026-10-02) |
| July 31, 2015 | HROW | M | 600,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| July 31, 2015 | HROW | A | 600,000 | · | · | 600,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 2, 2015 | IPWR | A | 12,834 | · | · | 12,834 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 10, 2014 | HROW | A | 15,400 | · | · | 15,400 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 3, 2014 | IPWR | A | 10,861 | $5.00 | $54,305 | 54,961 Direct | +24.63% | Acquired | -91.9% (price as of 2026-10-02) |
| Jan. 3, 2014 | IPWR | A | 10,861 | $5.00 | $54,305 | 54,961 Direct | +24.63% | Acquired | -91.9% (price as of 2026-10-02) |
| Jan. 2, 2014 | IPWR | A | 17,042 | · | · | 17,042 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 2, 2014 | IPWR | A | 12,742 | · | · | 12,742 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 27, 2013 | IPWR | J | 29,063 | $3.48 | $101,139 | 29,063 Indirect | · | Acquired | -88.4% (price as of 2026-10-02) |
| Nov. 27, 2013 | IPWR | C | 1 | $100000.00 | $100,000 | 14,383 Indirect | -0.01% | Disposed | -100.0% (price as of 2026-10-02) |
| May 2, 2013 | HROW | A | 180,000 | · | · | 180,000 Direct | · | Acquired | (price as of 2026-10-02) |
| May 2, 2013 | HROW | A | 200,000 | · | · | 1,419,835 Direct | +16.40% | Acquired | (price as of 2026-10-02) |
| May 2, 2013 | HROW | A | 1,050,000 | · | · | 1,219,835 Direct | +618.25% | Acquired | (price as of 2026-10-02) |
| July 18, 2012 | HROW | A | 800,000 | · | · | 1,646,927 Direct | +94.46% | Acquired | (price as of 2026-10-02) |
| July 12, 2012 | HROW | C | 10 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| July 12, 2012 | HROW | J | 846,927 | · | · | 846,927 Direct | · | Acquired | (price as of 2026-10-02) |
| June 29, 2012 | HROW | C | 7,498,500 | · | · | 15,738,545 Indirect | +91.00% | Acquired | (price as of 2026-10-02) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Dec. 12, 2025 | HROW | Stock Option (Right to Buy) [F1] | Common Stock | $3.95 | April 1, 2026 | 180,000 | Disposed |
| July 1, 2025 | HROW | RSU [F1] | Common Stock | · | · | 889,500 | Acquired |
| April 3, 2025 | HROW | Performance Stock Unit | Common Stock | · | · | 762,300 | Disposed |
| Feb. 20, 2024 | HROW | RSU [F1] | Common Stock | $0.00 | · | 150,000 | Disposed |
| Feb. 7, 2024 | HROW | Stock Option (Right to Buy) [F1] | Common Stock | $7.71 | Feb. 10, 2024 | 15,400 | Disposed |
| July 18, 2023 | HROW | Performance Stock Unit | Common Stock | · | · | 762,300 | Disposed |
| April 3, 2023 | HROW | Stock Option (Right to Buy) | Common Stock | $8.99 | May 2, 2023 | 180,000 | Disposed |
| April 3, 2023 | HROW | Restricted Stock Unit | Common Stock | · | April 3, 2028 | 762,300 | Acquired |
| Jan. 2, 2023 | HROW | Restricted Stock Unit [F1] | Common Stock | $0.00 | · | 88,000 | Disposed |
| Jan. 20, 2022 | HROW | Stock Option (Right to buy) [F1] | Common Stock | $2.40 | Jan. 25, 2022 | 125,000 | Disposed |
| July 23, 2021 | HROW | Restricted Stock Unit | Common Stock | · | July 23, 2026 | 762,301 | Acquired |
| April 25, 2021 | HROW | Restricked Stock Unit [F1] | Common Stock | $0.00 | April 25, 2021 | 850,000 | Disposed |
| Feb. 25, 2021 | HROW | Restricted Stock Unit [F1] | Common Stock | $0.00 | · | 200,000 | Disposed |
| Feb. 19, 2021 | HROW | Restricted Stock Unit | Common Stock | $0.00 | Feb. 19, 2024 | 150,000 | Acquired |
| June 4, 2020 | HROW | Employee Stock Option - Right to Buy | Common Stock | $7.87 | July 31, 2020 | 600,000 | Disposed |
| June 4, 2020 | HROW | Employee Stock Option - Right to Buy | Common Stock | $7.87 | July 31, 2025 | 600,000 | Acquired |
| March 12, 2020 | ETON | Stock Option (Right to buy) | Common Stock | $3.58 | March 11, 2030 | 27,400 | Acquired |
| Jan. 2, 2020 | HROW | Option - Right to Buy | Common Stock | $7.30 | Jan. 2, 2030 | 217,500 | Disposed |
| Jan. 2, 2020 | HROW | Restricted Stock Unit | Common Stock | $0.00 | Jan. 2, 2023 | 88,000 | Disposed |
| Jan. 2, 2020 | HROW | Option - Right to Buy | Common Stock | $7.30 | Jan. 2, 2030 | 217,500 | Acquired |
| Jan. 2, 2020 | HROW | Restricted Stock Unit | Common Stock | $0.00 | Jan. 2, 2023 | 88,000 | Acquired |
| Nov. 22, 2019 | HROW | Purchase Warrant [F2] | Common Stock | $1.79 | Dec. 23, 2019 | 156,000 | Disposed |
| Feb. 20, 2019 | ETON | Stock option (right to buy) | Common Stock | $7.31 | Feb. 19, 2029 | 12,500 | Acquired |
| Feb. 19, 2019 | HROW | Option - Right to Buy | Common Stock | $6.30 | Feb. 19, 2029 | 150,000 | Acquired |
| Jan. 2, 2018 | HROW | Option - Right to Buy | Common Stock | $1.73 | Jan. 2, 2028 | 150,000 | Acquired |
| March 3, 2017 | IPWR | Common Stock Warrants | Common Stock | $2.41 | March 3, 2020 | 7,800 | Acquired |
| Feb. 1, 2017 | HROW | Option - Right to Buy | Common Stock | $2.23 | Feb. 1, 2027 | 160,000 | Acquired |
| Jan. 3, 2017 | IPWR | Option to Purchase Stock [F1,F2] | Common Stock | $3.15 | Jan. 3, 2027 | 27,875 | Acquired |
| Dec. 19, 2016 | HROW | Purchase Warrant | Common Stock | $1.79 | Dec. 23, 2019 | 156,000 | Acquired |
| Dec. 19, 2016 | HROW | Restricted Stock Unit [F2] | Common Stock | $0.00 | · | 200,000 | Disposed |
| April 25, 2016 | HROW | Executive RSU [F1] | Common Stock | $0.00 | April 25, 2021 | 1,050,000 | Acquired |
| April 25, 2016 | HROW | Executive RSU [F2] | Common Stock | $0.00 | April 25, 2016 | 1,050,000 | Disposed |
| April 1, 2016 | HROW | Option - Right to Buy | Common Stock | $3.95 | April 1, 2026 | 180,000 | Acquired |
| Jan. 4, 2016 | IPWR | Option to Purchase Stock [F1] | Common Stock | $7.94 | Jan. 4, 2026 | 12,646 | Acquired |
| July 31, 2015 | HROW | Stock Option (Right to Buy) [F1] | Common Stock | $7.87 | July 31, 2025 | 600,000 | Disposed |
| July 31, 2015 | HROW | Employee Stock Option - Right to Buy | Common Stock | $7.87 | July 31, 2020 | 600,000 | Acquired |
| Jan. 2, 2015 | IPWR | Option to Purchase Stock [F1,F2] | Common Stock | $7.32 | Jan. 2, 2025 | 12,834 | Acquired |
| Feb. 10, 2014 | HROW | Option - Right to Buy | Common Stock | $7.71 | Feb. 10, 2024 | 15,400 | Acquired |
| Jan. 2, 2014 | IPWR | Option to Purchase Common Stock [F4,F5] | Common Stock | $5.49 | Jan. 2, 2024 | 17,042 | Acquired |
| Jan. 2, 2014 | IPWR | Option to Purchase Common Stock [F4] | Common Stock | $5.49 | Jan. 2, 2014 | 12,742 | Acquired |
| Nov. 27, 2013 | IPWR | Convertible Promissory Note | Common Stock | $3.48 | · | 1 | Disposed |
| May 2, 2013 | HROW | Option - Right to Buy | Common Stock | $8.99 | May 2, 2023 | 180,000 | Acquired |
| July 12, 2012 | HROW | Series A Convertible Preferred Stock | Common Stock | $0.00 | · | 10 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 11 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Nov. 13, 2018 | ETON | Common Stock | 784,745 | Direct |
| Nov. 13, 2018 | ETON | Restricted Stock Units | 25,000 | Direct |
| Nov. 21, 2013 | IPWR | Common Stock | 52,432 | Direct |
| Nov. 21, 2013 | IPWR | Senior Secured Convertible Promissory Note | 28,935 | Indirect |
| Nov. 21, 2013 | IPWR | Warrant | 14,383 | Indirect |
| April 27, 2012 | HROW | Common Stock | 8,240,045 | Indirect |
| April 27, 2012 | HROW | Series A Convertible Preferred Stock | 7,498,500 | Indirect |
| April 27, 2012 | HROW | Option (Right to Buy) | 625,000 | Direct |
| April 27, 2012 | HROW | Option (Right to Buy) | 300,000 | Direct |
| April 27, 2012 | HROW | Option (Right to Buy) | 125,000 | Direct |
| April 27, 2012 | HROW | Warrants | 241,308 | Indirect |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2016 | $372,386 | · | $2,072,933 | $544,860 | $153,043 | · | $10,600 | $3,153,822 |
| 2015 | $338,870 | · | · | $2,783,577 | $114,369 | · | $10,600 | $3,247,416 |
| 2014 | $327,456 | · | · | $94,718 | $203,980 | · | $7,800 | $633,954 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.