David A Christian

Insider

First SEC filing: Dec. 21, 2006 · Latest: Dec. 21, 2006

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 + 43 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

43 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 11, 2026	OKLO	A	3,213	—	—	7,912 Direct	+68.38%	Acquired	(price as of 2026-08-20)
April 10, 2026	OKLO	A	4,699	—	—	4,699 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 3, 2016	D	A	11,985	—	—	131,375 Direct	+10.04%	Acquired	(price as of 2026-08-20)
Feb. 1, 2016	D	F	5,494	$70.18	$385,569	119,390 Direct	-4.40%	Disposed	-2.7% (price as of 2026-08-20)
Dec. 22, 2015	D	F	147	$67.14	$9,870	124,884 Direct	-0.12%	Disposed	1.7% (price as of 2026-08-20)
Dec. 20, 2015	D	F	15,134	$66.90	$1,012,465	125,031 Direct	-10.80%	Disposed	2.0% (price as of 2026-08-20)
Dec. 20, 2015	D	A	307	—	—	140,165 Direct	+0.22%	Acquired	(price as of 2026-08-20)
Oct. 1, 2015	D	F	3,012	$69.16	$208,310	139,858 Direct	-2.11%	Disposed	-1.3% (price as of 2026-08-20)
Sept. 20, 2015	D	A	294	—	—	142,870 Direct	+0.21%	Acquired	(price as of 2026-08-20)
June 20, 2015	D	A	296	—	—	142,576 Direct	+0.21%	Acquired	(price as of 2026-08-20)
March 20, 2015	D	A	276	—	—	142,280 Direct	+0.19%	Acquired	(price as of 2026-08-20)
Feb. 1, 2015	D	F	4,394	$76.89	$337,855	142,004 Direct	-3.00%	Disposed	-11.2% (price as of 2026-08-20)
Feb. 1, 2015	D	A	9,478	—	—	146,398 Direct	+6.92%	Acquired	(price as of 2026-08-20)
Dec. 20, 2014	D	A	243	—	—	136,920 Direct	+0.18%	Acquired	(price as of 2026-08-20)
Nov. 18, 2014	D	G	400	—	—	136,677 Direct	-0.29%	Disposed	(price as of 2026-08-20)
Oct. 1, 2014	D	A	6,314	—	—	137,077 Direct	+4.83%	Acquired	(price as of 2026-08-20)
Sept. 20, 2014	D	A	264	—	—	130,763 Direct	+0.20%	Acquired	(price as of 2026-08-20)
June 20, 2014	D	A	256	—	—	130,499 Direct	+0.20%	Acquired	(price as of 2026-08-20)
March 20, 2014	D	A	256	—	—	130,243 Direct	+0.20%	Acquired	(price as of 2026-08-20)
Feb. 1, 2014	D	F	4,425	$67.91	$300,502	129,987 Direct	-3.29%	Disposed	0.5% (price as of 2026-08-20)
Feb. 1, 2014	D	A	10,732	—	—	134,412 Direct	+8.68%	Acquired	(price as of 2026-08-20)
Dec. 20, 2013	D	A	257	—	—	123,680 Direct	+0.21%	Acquired	(price as of 2026-08-20)
Sept. 20, 2013	D	A	264	—	—	123,423 Direct	+0.21%	Acquired	(price as of 2026-08-20)
June 20, 2013	D	A	300	—	—	123,159 Direct	+0.24%	Acquired	(price as of 2026-08-20)
April 29, 2013	D	S	30,000	$61.22	$1,836,600	122,859 Direct	-19.63%	Disposed	11.5% (price as of 2026-08-20)
March 20, 2013	D	A	282	—	—	152,859 Direct	+0.18%	Acquired	(price as of 2026-08-20)
Feb. 1, 2013	D	F	3,790	$54.17	$205,304	152,577 Direct	-2.42%	Disposed	26.0% (price as of 2026-08-20)
Feb. 1, 2013	D	A	13,454	—	—	156,367 Direct	+9.41%	Acquired	(price as of 2026-08-20)
Dec. 20, 2012	D	A	28,736	—	—	142,913 Direct	+25.17%	Acquired	(price as of 2026-08-20)
Feb. 1, 2012	D	F	3,017	$50.42	$152,117	114,177 Direct	-2.57%	Disposed	35.4% (price as of 2026-08-20)
Feb. 1, 2012	D	A	13,140	—	—	117,194 Direct	+12.63%	Acquired	(price as of 2026-08-20)
April 1, 2011	D	F	2,809	$44.70	$125,562	104,054 Direct	-2.63%	Disposed	52.7% (price as of 2026-08-20)
Feb. 1, 2011	D	A	12,920	—	—	106,863 Direct	+13.75%	Acquired	(price as of 2026-08-20)
April 3, 2010	D	F	2,947	$41.83	$123,273	93,943 Direct	-3.04%	Disposed	63.2% (price as of 2026-08-20)
Feb. 1, 2010	D	A	11,346	—	—	96,890 Direct	+13.26%	Acquired	(price as of 2026-08-20)
Dec. 20, 2009	D	F	2,043	$39.13	$79,943	85,544 Direct	-2.33%	Disposed	74.5% (price as of 2026-08-20)
April 1, 2009	D	F	3,946	$30.99	$122,287	87,587 Direct	-4.31%	Disposed	120.3% (price as of 2026-08-20)
Feb. 18, 2009	D	F	2,768	$33.62	$93,060	91,533 Direct	-2.94%	Disposed	103.1% (price as of 2026-08-20)
Feb. 2, 2009	D	A	9,239	—	—	94,301 Direct	+10.86%	Acquired	(price as of 2026-08-20)
April 1, 2008	D	A	7,958	—	—	85,062 Direct	+10.32%	Acquired	(price as of 2026-08-20)
Feb. 24, 2008	D	F	6,282	$42.27	$265,540	77,104 Direct	-7.53%	Disposed	61.5% (price as of 2026-08-20)
April 3, 2007	D	A	3,632	—	—	41,693 Direct	+9.54%	Acquired	(price as of 2026-08-20)
Feb. 21, 2007	D	S	2,000	$85.21	$170,420	38,061 Direct	-4.99%	Disposed	60.2% (price as of 2026-08-20)
Feb. 19, 2007	D	F	1,056	$86.58	$91,428	40,061 Direct	-2.57%	Disposed	57.7% (price as of 2026-08-20)
Dec. 20, 2006	D	A	2,420	—	—	41,117 Direct	+6.25%	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
June 11, 2026	OKLO	Restricted Stock Units	Class A Common Stock (3,213)	—	—	3,213	Acquired
April 10, 2026	OKLO	Restricted Stock Units	Class A Common Stock (4,699)	—	—	4,699	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 2 holdings

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
Dec. 21, 2006	D	Common Stock	41,117	Direct
Dec. 21, 2006	D	Common Stock	629	Indirect

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

D

President and CEO – Energy Infrastructure Group*

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2016	$680,138	—	$838,111	—	$1,171,147	$601,990	$121,603	$3,412,989
2015	$660,328	—	$728,763	—	$675,475	—	$108,104	$2,172,670
2014	$641,096	—	$1,166,118	—	$1,705,015	$760,722	$103,823	$4,376,774

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.