Gregory Haefele Clark
CIK 1800680 · View on SEC EDGAR ↗
Insider
First SEC filing: Aug. 18, 2025 · Latest: Aug. 18, 2025
On this page
- Insider at Companies where this person is a reporting insider.
- Insider transactions Every share this person bought or sold, from Form 4 filings.
- Derivatives Options and other derivative holdings reported by this person.
- Initial holdings The stakes this person held when they first started reporting.
- Compensation Executive pay disclosed in company proxy statements.
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 26 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 |
|---|---|---|---|---|---|---|---|---|---|
| Nov. 5, 2025 | MSM | M | 36 | — | — | 87 Direct | -29.27% | Disposed | (price as of 2026-08-20) |
| Nov. 5, 2025 | MSM | M | 221 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-20) |
| Nov. 5, 2025 | MSM | F | 93 | $86.68 | $8,061 | 612 Direct | -13.19% | Disposed | 36.7% (price as of 2026-08-20) |
| Nov. 5, 2025 | MSM | M | 36 | — | — | 705 Direct | +5.38% | Acquired | (price as of 2026-08-20) |
| Nov. 5, 2025 | MSM | M | 221 | — | — | 669 Direct | +49.33% | Acquired | (price as of 2026-08-20) |
| Nov. 4, 2025 | MSM | M | 10 | — | — | 123 Direct | -7.52% | Disposed | (price as of 2026-08-20) |
| Nov. 4, 2025 | MSM | M | 232 | — | — | 699 Direct | -24.92% | Disposed | (price as of 2026-08-20) |
| Nov. 4, 2025 | MSM | M | 27 | — | — | 132 Direct | -16.98% | Disposed | (price as of 2026-08-20) |
| Nov. 4, 2025 | MSM | M | 227 | — | — | 227 Direct | -50.00% | Disposed | (price as of 2026-08-20) |
| Nov. 4, 2025 | MSM | F | 88 | $86.42 | $7,605 | 448 Direct | -16.42% | Disposed | 37.1% (price as of 2026-08-20) |
| Nov. 4, 2025 | MSM | M | 10 | — | — | 536 Direct | +1.90% | Acquired | (price as of 2026-08-20) |
| Nov. 4, 2025 | MSM | M | 232 | — | — | 526 Direct | +78.91% | Acquired | (price as of 2026-08-20) |
| Nov. 4, 2025 | MSM | F | 92 | $86.42 | $7,951 | 294 Direct | -23.83% | Disposed | 37.1% (price as of 2026-08-20) |
| Nov. 4, 2025 | MSM | M | 27 | — | — | 386 Direct | +7.52% | Acquired | (price as of 2026-08-20) |
| Nov. 4, 2025 | MSM | M | 227 | — | — | 359 Direct | +171.97% | Acquired | (price as of 2026-08-20) |
| Nov. 3, 2025 | MSM | M | 15 | — | — | 159 Direct | -8.62% | Disposed | (price as of 2026-08-20) |
| Nov. 3, 2025 | MSM | M | 192 | — | — | 384 Direct | -33.33% | Disposed | (price as of 2026-08-20) |
| Nov. 3, 2025 | MSM | A | 884 | — | — | 884 Direct | — | Acquired | (price as of 2026-08-20) |
| Nov. 3, 2025 | MSM | F | 75 | $84.79 | $6,359 | 132 Direct | -36.23% | Disposed | 39.7% (price as of 2026-08-20) |
| Nov. 3, 2025 | MSM | M | 15 | — | — | 207 Direct | +7.81% | Acquired | (price as of 2026-08-20) |
| Nov. 3, 2025 | MSM | M | 192 | — | — | 192 Direct | — | Acquired | (price as of 2026-08-20) |
| July 28, 2020 | MSM | A | 35 | — | — | 411 Direct | +9.31% | Acquired | (price as of 2026-08-20) |
| May 22, 2020 | MSM | A | 889 | — | — | 889 Direct | — | Acquired | (price as of 2026-08-20) |
| May 22, 2020 | MSM | D | 889 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-20) |
| April 28, 2020 | MSM | A | 38 | — | — | 376 Direct | +11.24% | Acquired | (price as of 2026-08-20) |
| Feb. 5, 2020 | MSM | A | 230 | — | — | 338 Direct | +212.96% | Acquired | (price as of 2026-08-20) |
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 |
|---|---|---|---|---|---|---|---|
| Nov. 5, 2025 | MSM | Dividend Equivalent Units | Class A Common Stock, $0.001 par value (36) | — | — | 36 | Disposed |
| Nov. 5, 2025 | MSM | Restricted Stock Units (RSU) | Class A Common Stock, $0.001 par value (221) | — | — | 221 | Disposed |
| Nov. 4, 2025 | MSM | Dividend Equivalent Units | Class A Common Stock, $0.001 par value (10) | — | — | 10 | Disposed |
| Nov. 4, 2025 | MSM | Restricted Stock Units (RSU) | Class A Common Stock, $0.001 par value (232) | — | — | 232 | Disposed |
| Nov. 4, 2025 | MSM | Dividend Equivalent Units | Class A Common Stock, $0.001 par value (27) | — | — | 27 | Disposed |
| Nov. 4, 2025 | MSM | Restricted Stock Units (RSU) | Class A Common Stock, $0.001 par value (227) | — | — | 227 | Disposed |
| Nov. 3, 2025 | MSM | Dividend Equivalent Units | Class A Common Stock, $0.001 par value (15) | — | — | 15 | Disposed |
| Nov. 3, 2025 | MSM | Restricted Stock Units (RSU) | Class A Common Stock, $0.001 par value (192) | — | — | 192 | Disposed |
| Nov. 3, 2025 | MSM | Restricted Stock Units (RSU) | Class A Common Stock, $0.001 par value (884) | — | — | 884 | Acquired |
| July 28, 2020 | MSM | Dividend Equivalent Unit | Class A Common Stock, $0.001 par value (35) | — | — | 35 | Acquired |
| May 22, 2020 | MSM | Options (right to buy) | Class A Common Stock, $0.001 par value (889) | $83.03 | Oct. 21, 2022 | 889 | Acquired |
| May 22, 2020 | MSM | Options (right to buy) | Class A Common Stock, $0.001 par value (889) | $83.03 | Oct. 21, 2021 | 889 | Disposed |
| April 28, 2020 | MSM | Dividend Equivalent Unit | Class A Common Stock, $0.001 par value (38) | — | — | 38 | Acquired |
| Feb. 5, 2020 | MSM | Dividend Equivalent Unit | Class A Common Stock, $0.001 par value (230) | — | — | 230 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 18 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Aug. 18, 2025 | MSM | Class A Common Stock, $0.001 par value | 0 | Direct |
| Aug. 18, 2025 | MSM | Restricted Stock Units (RSU)→ Class A Common Stock, $0.001 par value (221) | 221 | Direct |
| Aug. 18, 2025 | MSM | Restricted Stock Units (RSU)→ Class A Common Stock, $0.001 par value (454) | 454 | Direct |
| Aug. 18, 2025 | MSM | Restricted Stock Units (RSU)→ Class A Common Stock, $0.001 par value (576) | 576 | Direct |
| Aug. 18, 2025 | MSM | Restricted Stock Units (RSU)→ Class A Common Stock, $0.001 par value (931) | 931 | Direct |
| Aug. 18, 2025 | MSM | Dividend Equivalent Units→ Class A Common Stock, $0.001 par value (175) | 175 | Direct |
| Jan. 27, 2020 | MSM | Class A Common Stock, $0.001 par value | 1,301 | Direct |
| Jan. 27, 2020 | MSM | Restricted Stock Units [F1]→ Class A Common Stock, $0.001 par value (159) | 159 | Direct |
| Jan. 27, 2020 | MSM | Restricted Stock Units [F1]→ Class A Common Stock, $0.001 par value (262) | 262 | Direct |
| Jan. 27, 2020 | MSM | Restricted Stock Units [F1]→ Class A Common Stock, $0.001 par value (353) | 353 | Direct |
| Jan. 27, 2020 | MSM | Restricted Stock Units [F1]→ Class A Common Stock, $0.001 par value (528) | 528 | Direct |
| Jan. 27, 2020 | MSM | Restricted Stock Units [F1]→ Class A Common Stock, $0.001 par value (1,474) | 1,474 | Direct |
| Jan. 27, 2020 | MSM | Dividend Equivalent Unit→ Class A Common Stock, $0.001 par value (108) | 108 | Direct |
| Jan. 27, 2020 | MSM | Options (right to buy) [F8]→ Class A Common Stock, $0.001 par value (889) | 889 | Direct |
| Jan. 27, 2020 | MSM | Options (right to buy) [F8]→ Class A Common Stock, $0.001 par value (2,382) | 2,382 | Direct |
| Jan. 27, 2020 | MSM | Options (right to buy) [F8]→ Class A Common Stock, $0.001 par value (3,088) | 3,088 | Direct |
| Jan. 27, 2020 | MSM | Options (right to buy) [F8]→ Class A Common Stock, $0.001 par value (3,122) | 3,122 | Direct |
| Jan. 27, 2020 | MSM | Options (right to buy) [F8]→ Class A Common Stock, $0.001 par value (3,202) | 3,202 | Direct |
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 | $312,279 | — | — | — | $137,332 | — | $22,823 | $622,362 |
| 2020 | $279,029 | — | — | — | $57,845 | — | $14,187 | $501,661 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.