Mark Howard Snyder
Insider
First SEC filing: June 15, 2026 · Latest: June 15, 2026
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 12, 2026 | HALO | M | 5,034 | · | · | 10,068 Direct | -33.33% | Disposed | (price as of 2026-10-06) |
| June 12, 2026 | HALO | F | 2,715 | $69.50 | $188,692 | 49,929 Direct | -5.16% | Disposed | 57.9% (price as of 2026-10-06) |
| June 12, 2026 | HALO | M | 5,034 | · | · | 52,644 Direct | +10.57% | Acquired | (price as of 2026-10-06) |
| Feb. 23, 2026 | HALO | M | 7,011 | · | · | 14,022 Direct | -33.33% | Disposed | (price as of 2026-10-06) |
| Feb. 23, 2026 | HALO | F | 3,782 | $70.64 | $267,160 | 47,610 Direct | -7.36% | Disposed | 55.3% (price as of 2026-10-06) |
| Feb. 23, 2026 | HALO | M | 7,011 | · | · | 51,392 Direct | +15.80% | Acquired | (price as of 2026-10-06) |
| Feb. 20, 2026 | HALO | M | 5,332 | · | · | 15,995 Direct | -25.00% | Disposed | (price as of 2026-10-06) |
| Feb. 20, 2026 | HALO | F | 2,876 | $70.98 | $204,138 | 44,381 Direct | -6.09% | Disposed | 54.6% (price as of 2026-10-06) |
| Feb. 20, 2026 | HALO | M | 5,332 | · | · | 47,257 Direct | +12.72% | Acquired | (price as of 2026-10-06) |
| Feb. 16, 2026 | HALO | M | 12,016 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Feb. 16, 2026 | HALO | M | 4,796 | · | · | 4,796 Direct | -50.00% | Disposed | (price as of 2026-10-06) |
| Feb. 16, 2026 | HALO | F | 6,481 | $79.44 | $514,851 | 41,925 Direct | -13.39% | Disposed | 38.1% (price as of 2026-10-06) |
| Feb. 16, 2026 | HALO | M | 12,016 | · | · | 48,406 Direct | +33.02% | Acquired | (price as of 2026-10-06) |
| Feb. 16, 2026 | HALO | F | 2,587 | $79.44 | $205,511 | 36,390 Direct | -6.64% | Disposed | 38.1% (price as of 2026-10-06) |
| Feb. 16, 2026 | HALO | M | 4,796 | · | · | 38,977 Direct | +14.03% | Acquired | (price as of 2026-10-06) |
| Feb. 9, 2026 | HALO | A | 29,502 | · | · | 29,502 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 9, 2026 | HALO | A | 7,808 | · | · | 45,127 Direct | +20.92% | Acquired | (price as of 2026-10-06) |
| Feb. 9, 2026 | HALO | A | 4,651 | · | · | 12,016 Direct | +63.15% | Acquired | (price as of 2026-10-06) |
| Feb. 9, 2026 | HALO | A | 17,396 | · | · | 17,396 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 9, 2026 | HALO | A | 18,730 | · | · | 18,730 Direct | · | Acquired | (price as of 2026-10-06) |
| Jan. 3, 2026 | HALO | M | 7,611 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Jan. 3, 2026 | HALO | F | 4,243 | $70.31 | $298,325 | 34,181 Direct | -11.04% | Disposed | 56.1% (price as of 2026-10-06) |
| Jan. 3, 2026 | HALO | M | 7,611 | · | · | 38,424 Direct | +24.70% | Acquired | (price as of 2026-10-06) |
| June 12, 2025 | HALO | M | 5,035 | · | · | 33,524 Direct | +17.67% | Acquired | (price as of 2026-10-06) |
| June 12, 2025 | HALO | F | 2,711 | $54.54 | $147,858 | 30,813 Direct | -8.09% | Disposed | 101.2% (price as of 2026-10-06) |
| June 12, 2025 | HALO | M | 5,035 | · | · | 15,102 Direct | -25.00% | Disposed | (price as of 2026-10-06) |
| Feb. 23, 2025 | HALO | M | 7,012 | · | · | 32,264 Direct | +27.77% | Acquired | (price as of 2026-10-06) |
| Feb. 23, 2025 | HALO | F | 3,775 | $57.75 | $218,006 | 28,489 Direct | -11.70% | Disposed | 90.0% (price as of 2026-10-06) |
| Feb. 23, 2025 | HALO | M | 7,012 | · | · | 21,033 Direct | -25.00% | Disposed | (price as of 2026-10-06) |
| Feb. 20, 2025 | HALO | A | 22,603 | · | · | 22,603 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 20, 2025 | HALO | A | 21,327 | · | · | 21,327 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 16, 2025 | HALO | M | 17,409 | · | · | 32,411 Direct | +116.04% | Acquired | (price as of 2026-10-06) |
| Feb. 16, 2025 | HALO | F | 9,373 | $58.29 | $546,352 | 23,038 Direct | -28.92% | Disposed | 88.2% (price as of 2026-10-06) |
| Feb. 16, 2025 | HALO | M | 4,796 | · | · | 27,834 Direct | +20.82% | Acquired | (price as of 2026-10-06) |
| Feb. 16, 2025 | HALO | F | 2,582 | $58.29 | $150,505 | 25,252 Direct | -9.28% | Disposed | 88.2% (price as of 2026-10-06) |
| Feb. 16, 2025 | HALO | M | 17,409 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Feb. 16, 2025 | HALO | M | 4,796 | · | · | 9,592 Direct | -33.33% | Disposed | (price as of 2026-10-06) |
| Feb. 12, 2025 | HALO | A | 6,050 | · | · | 17,409 Direct | +53.26% | Acquired | (price as of 2026-10-06) |
| Feb. 12, 2025 | HALO | A | 4,698 | · | · | 7,365 Direct | +176.15% | Acquired | (price as of 2026-10-06) |
| Feb. 12, 2025 | HALO | A | 7,269 | · | · | 7,269 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 12, 2025 | HALO | A | 30,050 | · | · | 30,050 Direct | · | Acquired | (price as of 2026-10-06) |
| Jan. 3, 2025 | HALO | M | 7,611 | · | · | 19,291 Direct | +65.16% | Acquired | (price as of 2026-10-06) |
| Jan. 3, 2025 | HALO | F | 4,289 | $47.74 | $204,757 | 15,002 Direct | -22.23% | Disposed | 129.8% (price as of 2026-10-06) |
| Jan. 3, 2025 | HALO | M | 7,611 | · | · | 7,611 Direct | -50.00% | Disposed | (price as of 2026-10-06) |
| June 12, 2024 | HALO | A | 20,137 | · | · | 20,137 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 23, 2024 | HALO | A | 29,064 | · | · | 29,064 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 23, 2024 | HALO | A | 28,045 | · | · | 28,045 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 16, 2024 | HALO | M | 4,796 | · | · | 14,257 Direct | +50.69% | Acquired | (price as of 2026-10-06) |
| Feb. 16, 2024 | HALO | F | 2,577 | $36.10 | $93,030 | 11,680 Direct | -18.08% | Disposed | 203.9% (price as of 2026-10-06) |
| Feb. 16, 2024 | HALO | M | 4,796 | · | · | 14,388 Direct | -25.00% | Disposed | (price as of 2026-10-06) |
| Jan. 3, 2024 | HALO | M | 7,611 | · | · | 12,418 Direct | +158.33% | Acquired | (price as of 2026-10-06) |
| Jan. 3, 2024 | HALO | F | 2,957 | $35.78 | $105,801 | 9,461 Direct | -23.81% | Disposed | 206.7% (price as of 2026-10-06) |
| Jan. 3, 2024 | HALO | M | 7,611 | · | · | 15,222 Direct | -33.33% | Disposed | (price as of 2026-10-06) |
| Feb. 16, 2023 | HALO | A | 54,955 | · | · | 54,955 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 16, 2023 | HALO | A | 19,184 | · | · | 19,184 Direct | · | Acquired | (price as of 2026-10-06) |
| Jan. 3, 2023 | HALO | M | 7,611 | · | · | 7,611 Direct | · | Acquired | (price as of 2026-10-06) |
| Jan. 3, 2023 | HALO | F | 2,804 | $55.13 | $154,585 | 4,807 Direct | -36.84% | Disposed | 99.0% (price as of 2026-10-06) |
| Jan. 3, 2023 | HALO | M | 7,611 | · | · | 22,833 Direct | -25.00% | Disposed | (price as of 2026-10-06) |
| Jan. 3, 2022 | HALO | A | 30,444 | · | · | 30,444 Direct | · | Acquired | (price as of 2026-10-06) |
| Jan. 3, 2022 | HALO | A | 83,142 | · | · | 83,142 Direct | · | Acquired | (price as of 2026-10-06) |
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 |
|---|---|---|---|---|---|---|---|
| June 12, 2026 | HALO | Restricted Stock Units | Common Stock | $0.00 | · | 5,034 | Disposed |
| Feb. 23, 2026 | HALO | Restricted Stock Units | Common Stock | $0.00 | · | 7,011 | Disposed |
| Feb. 20, 2026 | HALO | Restricted Stock Units | Common Stock | $0.00 | · | 5,332 | Disposed |
| Feb. 16, 2026 | HALO | Performance Stock Units | Common Stock | $0.00 | · | 12,016 | Disposed |
| Feb. 16, 2026 | HALO | Restricted Stock Units | Common Stock | $0.00 | · | 4,796 | Disposed |
| Feb. 9, 2026 | HALO | Performance Stock Units | Common Stock | $0.00 | · | 29,502 | Acquired |
| Feb. 9, 2026 | HALO | Performance Stock Units | Common Stock | $0.00 | · | 7,808 | Acquired |
| Feb. 9, 2026 | HALO | Performance Stock Units | Common Stock | $0.00 | · | 4,651 | Acquired |
| Feb. 9, 2026 | HALO | Restricted Stock Units | Common Stock | $0.00 | · | 17,396 | Acquired |
| Feb. 9, 2026 | HALO | Option to Purchase Common Stock | Common Stock | $80.48 | Feb. 9, 2036 | 18,730 | Acquired |
| Jan. 3, 2026 | HALO | Restricted Stock Units | Common Stock | $0.00 | · | 7,611 | Disposed |
| June 12, 2025 | HALO | Restricted Stock Units | Common Stock | $0.00 | · | 5,035 | Disposed |
| Feb. 23, 2025 | HALO | Restricted Stock Units | Common Stock | $0.00 | · | 7,012 | Disposed |
| Feb. 20, 2025 | HALO | Option to Purchase Common Stock | Common Stock | $57.44 | Feb. 20, 2035 | 22,603 | Acquired |
| Feb. 20, 2025 | HALO | Restricted Stock Units | Common Stock | $0.00 | · | 21,327 | Acquired |
| Feb. 16, 2025 | HALO | Performance Stock Units | Common Stock | $0.00 | · | 17,409 | Disposed |
| Feb. 16, 2025 | HALO | Restricted Stock Units | Common Stock | $0.00 | · | 4,796 | Disposed |
| Feb. 12, 2025 | HALO | Performance Stock Units | Common Stock | $0.00 | · | 6,050 | Acquired |
| Feb. 12, 2025 | HALO | Performance Stock Units | Common Stock | $0.00 | · | 4,698 | Acquired |
| Feb. 12, 2025 | HALO | Performance Stock Unit | Common Stock | $0.00 | · | 7,269 | Acquired |
| Feb. 12, 2025 | HALO | Performance Stock Units | Common Stock | $0.00 | · | 30,050 | Acquired |
| Jan. 3, 2025 | HALO | Restricted Stock Units | Common Stock | $0.00 | · | 7,611 | Disposed |
| June 12, 2024 | HALO | Restricted Stock Units | Common Stock | $0.00 | · | 20,137 | Acquired |
| Feb. 23, 2024 | HALO | Option to Purchase Common Stock | Common Stock | $40.56 | Feb. 23, 2034 | 29,064 | Acquired |
| Feb. 23, 2024 | HALO | Restricted Stock Units | Common Stock | $0.00 | · | 28,045 | Acquired |
| Feb. 16, 2024 | HALO | Restricted Stock Units | Common Stock | $0.00 | · | 4,796 | Disposed |
| Jan. 3, 2024 | HALO | Restricted Stock Units | Common Stock | $0.00 | · | 7,611 | Disposed |
| Feb. 16, 2023 | HALO | Option to Purchase Common Stock | Common Stock | $49.26 | Feb. 16, 2033 | 54,955 | Acquired |
| Feb. 16, 2023 | HALO | Restricted Stock Units | Common Stock | $0.00 | · | 19,184 | Acquired |
| Jan. 3, 2023 | HALO | Restricted Stock Units | Common Stock | $0.00 | · | 7,611 | Disposed |
| Jan. 3, 2022 | HALO | Restricted Stock Unit | Common Stock | $0.00 | Jan. 3, 2032 | 30,444 | Acquired |
| Jan. 3, 2022 | HALO | Option to Purchase Common Stock | Common Stock | $41.06 | Jan. 3, 2032 | 83,142 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
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 |
|---|---|---|---|---|---|---|---|---|
| 2025 | $619,000 | · | $2,975,129 | $525,004 | $394,613 | · | $17,822 | $4,531,568 |
| 2024 | $579,000 | · | $3,762,579 | $487,517 | $548,197 | · | $17,572 | $5,394,865 |
| 2023 | $546,000 | · | $1,620,053 | $1,080,003 | $349,549 | · | $17,322 | $3,612,927 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.