Michael C Armstrong
Insider
First SEC filing: Nov. 21, 2006 · Latest: Nov. 21, 2006
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
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Jan. 19, 2010 | C | A | 42,662 | · | · | 288,922 Direct | +17.32% | Acquired | (price as of 2026-10-02) |
| July 24, 2009 | C | A | 202,423 | · | · | 246,260 Direct | +461.76% | Acquired | (price as of 2026-10-02) |
| July 24, 2009 | C | D | 27,700 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| April 1, 2009 | C | A | 289 | $1.31 | $379 | 43,837 Direct | +0.66% | Acquired | 880.9% (price as of 2026-10-02) |
| April 1, 2009 | C | A | 904 | $1.31 | $1,184 | 119,185 Indirect | +0.76% | Acquired | 880.9% (price as of 2026-10-02) |
| Jan. 14, 2009 | C | A | 32,106 | · | · | 45,614 Direct | +237.68% | Acquired | (price as of 2026-10-02) |
| Oct. 17, 2008 | C | P | 27,700 | $17.75 | $491,675 | 27,700 Direct | · | Acquired | -27.6% (price as of 2026-10-02) |
| Jan. 22, 2008 | C | A | 5,697 | · | · | 13,508 Direct | +72.94% | Acquired | (price as of 2026-10-02) |
| Jan. 16, 2007 | C | A | 2,758 | · | · | 2,758 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 16, 2007 | C | A | 2,066 | · | · | 12,746 Direct | +19.34% | Acquired | (price as of 2026-10-02) |
| Jan. 1, 2007 | C | A | 47 | $51.38 | $2,415 | 10,680 Direct | +0.44% | Acquired | -75.0% (price as of 2026-10-02) |
| Jan. 1, 2007 | C | A | 294 | $51.38 | $15,106 | 111,280 Indirect | +0.26% | Acquired | -75.0% (price as of 2026-10-02) |
| Jan. 1, 2007 | C | A | 757 | $51.38 | $38,895 | 110,986 Indirect | +0.69% | Acquired | -75.0% (price as of 2026-10-02) |
| Jan. 1, 2007 | C | A | 444 | $51.38 | $22,813 | 110,229 Indirect | +0.40% | Acquired | -75.0% (price as of 2026-10-02) |
| Nov. 17, 2006 | HCA | D | 5,715 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Nov. 17, 2006 | HCA | D | 3,833 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Nov. 17, 2006 | HCA | D | 6,229 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Nov. 17, 2006 | HCA | D | 2,774 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Nov. 17, 2006 | HCA | D | 12,163 | $51.00 | $620,313 | 0 Direct | -100.00% | Disposed | 736.6% (price as of 2026-10-02) |
| Oct. 1, 2006 | C | A | 49 | $49.09 | $2,405 | 10,633 Direct | +0.46% | Acquired | -73.8% (price as of 2026-10-02) |
| Oct. 1, 2006 | C | A | 305 | $49.09 | $14,972 | 109,785 Indirect | +0.28% | Acquired | -73.8% (price as of 2026-10-02) |
| Oct. 1, 2006 | C | A | 781 | $49.09 | $38,339 | 109,480 Indirect | +0.72% | Acquired | -73.8% (price as of 2026-10-02) |
| Oct. 1, 2006 | C | A | 465 | $49.09 | $22,827 | 108,699 Indirect | +0.43% | Acquired | -73.8% (price as of 2026-10-02) |
| July 1, 2006 | C | A | 48 | $49.44 | $2,373 | 10,585 Direct | +0.46% | Acquired | -74.0% (price as of 2026-10-02) |
| July 1, 2006 | C | A | 300 | $49.44 | $14,832 | 108,235 Indirect | +0.28% | Acquired | -74.0% (price as of 2026-10-02) |
| July 1, 2006 | C | A | 763 | $49.44 | $37,723 | 107,935 Indirect | +0.71% | Acquired | -74.0% (price as of 2026-10-02) |
| July 1, 2006 | C | A | 462 | $49.44 | $22,841 | 107,172 Indirect | +0.43% | Acquired | -74.0% (price as of 2026-10-02) |
| May 25, 2006 | HCA | A | 3,833 | · | · | 3,833 Direct | · | Acquired | (price as of 2026-10-02) |
| May 25, 2006 | HCA | A | 3,105 | · | · | 12,163 Direct | +34.28% | Acquired | (price as of 2026-10-02) |
| April 1, 2006 | C | J | 50 | $46.52 | $2,326 | 10,537 Direct | +0.48% | Acquired | -72.4% (price as of 2026-10-02) |
| April 1, 2006 | C | J | 315 | $46.52 | $14,654 | 106,711 Indirect | +0.30% | Acquired | -72.4% (price as of 2026-10-02) |
| April 1, 2006 | C | J | 797 | $46.52 | $37,076 | 106,396 Indirect | +0.75% | Acquired | -72.4% (price as of 2026-10-02) |
| April 1, 2006 | C | A | 490 | $46.52 | $22,795 | 105,599 Indirect | +0.47% | Acquired | -72.4% (price as of 2026-10-02) |
| Jan. 17, 2006 | C | A | 4,599 | · | · | 4,599 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 17, 2006 | C | A | 2,307 | · | · | 10,487 Direct | +28.20% | Acquired | (price as of 2026-10-02) |
| Jan. 1, 2006 | C | J | 22 | $48.92 | $1,076 | 8,180 Direct | +0.27% | Acquired | -73.7% (price as of 2026-10-02) |
| Jan. 1, 2006 | C | J | 266 | $48.92 | $13,013 | 105,109 Indirect | +0.25% | Acquired | -73.7% (price as of 2026-10-02) |
| Jan. 1, 2006 | C | J | 670 | $48.92 | $32,776 | 104,842 Indirect | +0.64% | Acquired | -73.7% (price as of 2026-10-02) |
| Jan. 1, 2006 | C | A | 466 | $48.92 | $22,797 | 104,172 Indirect | +0.45% | Acquired | -73.7% (price as of 2026-10-02) |
| Oct. 1, 2005 | C | J | 24 | $44.55 | $1,069 | 8,158 Direct | +0.30% | Acquired | -71.2% (price as of 2026-10-02) |
| Oct. 1, 2005 | C | J | 289 | $44.55 | $12,875 | 103,706 Indirect | +0.28% | Acquired | -71.2% (price as of 2026-10-02) |
| Oct. 1, 2005 | C | J | 723 | $44.55 | $32,210 | 103,417 Indirect | +0.70% | Acquired | -71.2% (price as of 2026-10-02) |
| Oct. 1, 2005 | C | A | 512 | $44.55 | $22,810 | 102,694 Indirect | +0.50% | Acquired | -71.2% (price as of 2026-10-02) |
| July 1, 2005 | C | J | 665 | $47.64 | $31,681 | 101,914 Indirect | +0.66% | Acquired | -73.0% (price as of 2026-10-02) |
| July 1, 2005 | C | A | 479 | $47.64 | $22,820 | 101,249 Indirect | +0.48% | Acquired | -73.0% (price as of 2026-10-02) |
| July 1, 2005 | C | J | 22 | $47.64 | $1,048 | 8,135 Direct | +0.27% | Acquired | -73.0% (price as of 2026-10-02) |
| July 1, 2005 | C | J | 268 | $47.64 | $12,768 | 102,182 Indirect | +0.26% | Acquired | -73.0% (price as of 2026-10-02) |
| June 9, 2005 | HCA | A | 5,715 | · | · | 5,715 Direct | · | Acquired | (price as of 2026-10-02) |
| June 9, 2005 | HCA | A | 1,394 | · | · | 9,058 Direct | +18.19% | Acquired | (price as of 2026-10-02) |
| April 1, 2005 | C | J | 22 | $48.14 | $1,059 | 8,113 Direct | +0.27% | Acquired | -73.3% (price as of 2026-10-02) |
| April 1, 2005 | C | J | 263 | $48.14 | $12,661 | 100,770 Indirect | +0.26% | Acquired | -73.3% (price as of 2026-10-02) |
| April 1, 2005 | C | J | 648 | $48.14 | $31,195 | 100,507 Indirect | +0.65% | Acquired | -73.3% (price as of 2026-10-02) |
| April 1, 2005 | C | A | 474 | $48.14 | $22,818 | 99,860 Indirect | +0.48% | Acquired | -73.3% (price as of 2026-10-02) |
| Jan. 18, 2005 | C | A | 4,737 | · | · | 4,737 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 18, 2005 | C | A | 2,346 | · | · | 8,091 Direct | +40.84% | Acquired | (price as of 2026-10-02) |
| Jan. 1, 2005 | C | A | 812 | $46.18 | $37,498 | 98,538 Indirect | +0.83% | Acquired | -72.2% (price as of 2026-10-02) |
| Jan. 1, 2005 | C | J | 601 | $46.18 | $27,754 | 99,139 Indirect | +0.61% | Acquired | -72.2% (price as of 2026-10-02) |
| Jan. 1, 2005 | C | J | 247 | $46.18 | $11,406 | 99,386 Indirect | +0.25% | Acquired | -72.2% (price as of 2026-10-02) |
| Nov. 5, 2004 | CCZ | A | 7,500 | · | · | 7,500 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2004 | C | J | 240 | $46.97 | $11,273 | 97,726 Indirect | +0.25% | Acquired | -72.6% (price as of 2026-10-02) |
| Oct. 1, 2004 | C | J | 579 | $46.97 | $27,196 | 97,485 Indirect | +0.60% | Acquired | -72.6% (price as of 2026-10-02) |
| Oct. 1, 2004 | C | A | 798 | $46.97 | $37,482 | 96,906 Indirect | +0.83% | Acquired | -72.6% (price as of 2026-10-02) |
| Aug. 12, 2004 | C | G | 150 | · | · | 5,745 Direct | -2.54% | Disposed | (price as of 2026-10-02) |
| July 1, 2004 | C | J | 238 | $47.00 | $11,186 | 96,108 Indirect | +0.25% | Acquired | -72.7% (price as of 2026-10-02) |
| July 1, 2004 | C | J | 567 | $47.00 | $26,649 | 95,870 Indirect | +0.59% | Acquired | -72.7% (price as of 2026-10-02) |
| July 1, 2004 | C | A | 798 | $47.00 | $37,506 | 95,303 Indirect | +0.84% | Acquired | -72.7% (price as of 2026-10-02) |
| June 10, 2004 | HCA | A | 6,229 | · | · | 6,229 Direct | · | Acquired | (price as of 2026-10-02) |
| June 10, 2004 | HCA | A | 1,900 | · | · | 7,664 Direct | +32.96% | Acquired | (price as of 2026-10-02) |
| May 26, 2004 | CCZ | A | 3,750 | · | · | 3,750 Direct | · | Acquired | (price as of 2026-10-02) |
| May 25, 2004 | CCZ | M | 110,255 | · | · | 542,510 Direct | +25.51% | Acquired | (price as of 2026-10-02) |
| May 25, 2004 | CCZ | D | 110,255 | $29.57 | $3,260,240 | 432,255 Direct | -20.32% | Disposed | 112.7% (price as of 2026-10-02) |
| May 25, 2004 | CCZ | M | 110,255 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| April 1, 2004 | C | J | 224 | $49.64 | $11,119 | 94,505 Indirect | +0.24% | Acquired | -74.1% (price as of 2026-10-02) |
| April 1, 2004 | C | J | 526 | $49.64 | $26,111 | 94,281 Indirect | +0.56% | Acquired | -74.1% (price as of 2026-10-02) |
| April 1, 2004 | C | A | 756 | $49.64 | $37,528 | 93,755 Indirect | +0.81% | Acquired | -74.1% (price as of 2026-10-02) |
| Jan. 29, 2004 | HCA | A | 2,774 | · | · | 2,774 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 29, 2004 | HCA | A | 5,764 | · | · | 5,764 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 20, 2004 | C | A | 2,500 | · | · | 2,500 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 20, 2004 | C | A | 2,500 | · | · | 2,500 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 1, 2004 | C | J | 204 | $47.24 | $9,637 | 92,999 Indirect | +0.22% | Acquired | -72.8% (price as of 2026-10-02) |
| Jan. 1, 2004 | C | J | 475 | $47.24 | $22,439 | 92,795 Indirect | +0.51% | Acquired | -72.8% (price as of 2026-10-02) |
| Jan. 1, 2004 | C | A | 794 | $47.24 | $37,509 | 92,320 Indirect | +0.87% | Acquired | -72.8% (price as of 2026-10-02) |
| Oct. 1, 2003 | C | J | 216 | $44.28 | $9,564 | 91,527 Indirect | +0.24% | Acquired | -71.0% (price as of 2026-10-02) |
| Oct. 1, 2003 | C | J | 496 | $44.28 | $21,963 | 91,311 Indirect | +0.55% | Acquired | -71.0% (price as of 2026-10-02) |
| Oct. 1, 2003 | C | A | 790 | $44.28 | $34,981 | 90,814 Indirect | +0.88% | Acquired | -71.0% (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 |
|---|---|---|---|---|---|---|---|
| Jan. 16, 2007 | C | Employee Stock Options (Right to Buy) | Common Stock | $54.38 | Jan. 16, 2013 | 2,758 | Acquired |
| Nov. 17, 2006 | HCA | Non-Qualified Stock Option (right-to-buy) | Common Stock | $54.68 | June 9, 2015 | 5,715 | Disposed |
| Nov. 17, 2006 | HCA | Non-Qualified Stock Option (right to buy) | Common Stock | $43.49 | May 25, 2016 | 3,833 | Disposed |
| Nov. 17, 2006 | HCA | Non-Qualified Stock Option (right to buy) | Common Stock | $40.14 | June 10, 2014 | 6,229 | Disposed |
| Nov. 17, 2006 | HCA | Non-Qualified Stock Option (right to buy) | Common Stock | $45.86 | Jan. 29, 2014 | 2,774 | Disposed |
| May 25, 2006 | HCA | Non-Qualified Stock Option (right to buy) | Common Stock | $43.49 | May 25, 2016 | 3,833 | Acquired |
| Jan. 17, 2006 | C | Employee Stock Options (Right to Buy) | Common Stock | $48.92 | Jan. 17, 2012 | 4,599 | Acquired |
| June 9, 2005 | HCA | Non-Qualified Stock Option (right-to-buy) | Common Stock | $54.68 | June 9, 2015 | 5,715 | Acquired |
| Jan. 18, 2005 | C | Employee Stock Options (Right to Buy) | Common Stock | $47.50 | Jan. 18, 2011 | 4,737 | Acquired |
| Nov. 5, 2004 | CCZ | Option to Purchase Class A Common Stock | Class A Common Stock | $29.69 | Nov. 5, 2014 | 7,500 | Acquired |
| June 10, 2004 | HCA | Non-Qualified Stock Option (right to buy) | Common Stock | $40.14 | June 10, 2014 | 6,229 | Acquired |
| May 26, 2004 | CCZ | Option to Purchase [F1] | Class A Common Stock | $29.69 | May 26, 2014 | 3,750 | Acquired |
| May 25, 2004 | CCZ | Phantom Stock | Class A Common Stock | · | May 25, 2004 | 110,255 | Disposed |
| Jan. 29, 2004 | HCA | Non-Qualified Stock Option (right to buy) | Common Stock | $45.86 | Jan. 29, 2014 | 2,774 | Acquired |
| Jan. 20, 2004 | C | Employee Stock Options (Right to Buy) | Common Stock | $49.50 | Jan. 20, 2010 | 2,500 | Acquired |
| Jan. 20, 2004 | C | Employe Stock Options (Right to Buy) | Common Stock | $49.50 | Jan. 20, 2010 | 2,500 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Jan. 30, 2004 | HCA | No Securities Beneficially Owned | 0 | Direct |