Katherine Brennan
CIK 1917984 · View on SEC EDGAR ↗
Insider
First SEC filing: March 21, 2022 · Latest: May 1, 2026
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 21 non-open-market transactions below
last 12 months, based on the transactions shown below
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 |
|---|---|---|---|---|---|---|---|---|---|
| May 1, 2026 | MRSH | A | 5,963 | — | — | 5,963 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 28, 2026 | MRSH | M | 6,970 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-21) |
| Feb. 28, 2026 | MRSH | F | 3,855 | $186.74 | $719,883 | 7,330 Direct | -34.47% | Disposed | 2.4% (price as of 2026-08-21) |
| Feb. 28, 2026 | MRSH | M | 6,970 | — | — | 11,185 Direct | +165.36% | Acquired | (price as of 2026-08-21) |
| Feb. 24, 2026 | MRSH | A | 6,970 | — | — | 6,970 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 24, 2026 | MRSH | A | 22,372 | — | — | 22,372 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 28, 2025 | MRSH | M | 2,315 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-21) |
| Feb. 28, 2025 | MRSH | F | 1,282 | $233.74 | $299,655 | 4,215 Direct | -23.32% | Disposed | -18.2% (price as of 2026-08-21) |
| Feb. 28, 2025 | MRSH | M | 2,315 | — | — | 5,497 Direct | +72.75% | Acquired | (price as of 2026-08-21) |
| Feb. 18, 2025 | MRSH | A | 1,736 | — | — | 2,315 Direct | +299.83% | Acquired | (price as of 2026-08-21) |
| Feb. 18, 2025 | MRSH | A | 15,702 | — | — | 15,702 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 28, 2024 | MRSH | M | 3,557 | — | — | 579 Direct | -86.00% | Disposed | (price as of 2026-08-21) |
| Feb. 28, 2024 | MRSH | F | 1,968 | $202.98 | $399,465 | 3,182 Direct | -38.21% | Disposed | -5.8% (price as of 2026-08-21) |
| Feb. 28, 2024 | MRSH | M | 3,557 | — | — | 5,150 Direct | +223.29% | Acquired | (price as of 2026-08-21) |
| Feb. 22, 2024 | MRSH | A | 2,234 | — | — | 4,136 Direct | +117.46% | Acquired | (price as of 2026-08-21) |
| Feb. 22, 2024 | MRSH | A | 16,066 | — | — | 16,066 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 28, 2023 | MRSH | F | 1,975 | $162.83 | $321,589 | 1,593 Direct | -55.35% | Disposed | 17.4% (price as of 2026-08-21) |
| Feb. 28, 2023 | MRSH | M | 3,568 | — | — | 1,902 Direct | -65.23% | Disposed | (price as of 2026-08-21) |
| Feb. 28, 2023 | MRSH | M | 3,568 | — | — | 3,568 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 23, 2023 | MRSH | A | 1,684 | — | — | 5,470 Direct | +44.48% | Acquired | (price as of 2026-08-21) |
| Feb. 23, 2023 | MRSH | A | 15,505 | — | — | 15,505 Direct | — | Acquired | (price as of 2026-08-21) |
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 |
|---|---|---|---|---|---|---|---|
| May 1, 2026 | MRSH | Restricted Stock Units | Common Stock (5,963) | — | — | 5,963 | Acquired |
| Feb. 28, 2026 | MRSH | Restricted Stock Units | Common Stock (6,970) | — | — | 6,970 | Disposed |
| Feb. 24, 2026 | MRSH | Restricted Stock Units | Common Stock (6,970) | — | — | 6,970 | Acquired |
| Feb. 24, 2026 | MRSH | Stock Options (Right to Buy) | Common Stock (22,372) | $176.99 | Feb. 23, 2036 | 22,372 | Acquired |
| Feb. 28, 2025 | MRSH | Restricted Stock Units | Common Stock (2,315) | — | — | 2,315 | Disposed |
| Feb. 18, 2025 | MRSH | Restricted Stock Units | Common Stock (1,736) | — | — | 1,736 | Acquired |
| Feb. 18, 2025 | MRSH | Stock Options (Right to Buy) | Common Stock (15,702) | $230.29 | Feb. 17, 2035 | 15,702 | Acquired |
| Feb. 28, 2024 | MRSH | Restricted Stock Units | Common Stock (3,557) | — | — | 3,557 | Disposed |
| Feb. 22, 2024 | MRSH | Restricted Stock Units | Common Stock (2,234) | — | — | 2,234 | Acquired |
| Feb. 22, 2024 | MRSH | Stock Options (Right to Buy) | Common Stock (16,066) | $200.47 | Feb. 21, 2034 | 16,066 | Acquired |
| Feb. 28, 2023 | MRSH | Restricted Stock Units | Common Stock (3,568) | — | — | 3,568 | Disposed |
| Feb. 23, 2023 | MRSH | Restricted Stock Units | Common Stock (1,684) | — | — | 1,684 | Acquired |
| Feb. 23, 2023 | MRSH | Stock Options (Right to Buy) | Common Stock (15,505) | $164.14 | Feb. 22, 2033 | 15,505 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 6 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| March 21, 2022 | MRSH | Restricted Stock Units→ Common Stock (3,786) | 3,786 | Direct |
| March 21, 2022 | MRSH | Stock Options (Right to Buy)→ Common Stock (1,197) | 1,197 | Direct |
| March 21, 2022 | MRSH | Stock Options (Right to Buy)→ Common Stock (5,609) | 5,609 | Direct |
| March 21, 2022 | MRSH | Stock Options (Right to Buy)→ Common Stock (4,743) | 4,743 | Direct |
| March 21, 2022 | MRSH | Stock Options (Right to Buy)→ Common Stock (5,900) | 5,900 | Direct |
| March 21, 2022 | MRSH | Stock Options (Right to Buy)→ Common Stock (4,183) | 4,183 | Direct |