

					Initial Cost to Company				Costs Capitalized Subsequent to Acquisition				Cost amount carried at Close of Period
	Property	Location	Encumbrances ⁽¹⁾		Land		Buildings and Equipment		Costs Capitalized Subsequent to Acquisition		Impairments/ Writedowns		Land		Buildings and Equipment		Total ⁽²⁾		Accumulated Depreciation ⁽³⁾			Date(s) Acquired	Original Construction Date(s)
1	131 Clayton Street	Montgomery, AL	$	—	$	920	$	9,084	$	29	$	—	$	920	$	9,113	$	10,033	$	(1,479	)	6/22/2011	2007
2	4344 Carmichael Road	Montgomery, AL	—		1,374		11,658		—		—		1,374		11,658		13,032		(1,166		)	12/17/2013	2009
3	15451 North 28th Avenue	Phoenix, AZ	—		1,917		7,416		456		—		1,917		7,872		9,789		(628		)	9/10/2014	1996
4	711 S 14th Avenue	Safford, AZ	—		460		11,708		348		—		460		12,056		12,516		(2,232		)	6/16/2010	1992
5	5045 East Butler Street	Fresno, CA	—		7,276		61,118		58		—		7,276		61,176		68,452		(23,497		)	8/29/2002	1971
6	10949 N. Mather Boulevard	Rancho Cordova, CA	—		562		16,923		101		—		562		17,024		17,586		(1,769		)	10/30/2013	2012
7	11020 Sun Center Drive	Rancho Cordova, CA	—		1,466		8,797		408		—		1,466		9,205		10,670		(237		)	12/20/2016	1983
8	801 K Street	Sacramento, CA	—		4,688		61,995		4,915		—		4,688		66,910		71,598		(3,608		)	1/29/2016	1989
9	9800 Goethe Road	Sacramento, CA	—		1,550		12,263		949		—		1,550		13,212		14,762		(2,598		)	12/23/2009	1993
10	9815 Goethe Road	Sacramento, CA	—		1,450		9,465		1,523		—		1,450		10,988		12,438		(1,731		)	9/14/2011	1992
11	Capitol Place	Sacramento, CA	—		2,290		35,891		7,032		—		2,290		42,923		45,213		(8,331		)	12/17/2009	1988
12	4181 Ruffin Road	San Diego, CA	—		5,250		10,549		4,294		—		5,250		14,843		20,093		(3,332		)	7/16/2010	1981
13	4560 Viewridge Road	San Diego, CA	—		4,269		18,316		4,195		—		4,347		22,433		26,780		(9,882		)	3/31/1997	1996
14	9174 Sky Park Centre	San Diego, CA	—		685		5,530		2,653		—		685		8,183		8,868		(2,684		)	6/24/2002	1986
15	603 San Juan Avenue	Stockton, CA	—		563		5,470		—		—		563		5,470		6,033		(741		)	7/20/2012	2012
16	16194 West 45th Street	Golden, CO	—		494		152		6,495		—		494		6,647		7,141		(3,316		)	3/31/1997	1997
17	12795 West Alameda Parkway	Lakewood, CO	4,111		2,640		23,777		1,065		—		2,640		24,842		27,482		(4,931		)	1/15/2010	1988
18	Corporate Center	Lakewood, CO	—		2,887		27,537		3,898		—		2,887		31,435		34,322		(11,581		)	10/11/2002	1980
19	20 Massachusetts Avenue	Washington, DC	—		12,009		51,528		21,245		—		12,231		72,551		84,782		(33,237		)	3/31/1997	1996
20	625 Indiana Avenue	Washington, DC	—		26,000		25,955		6,555		—		26,000		32,510		58,510		(6,374		)	8/17/2010	1989
21	11 Dupont Circle, NW	Washington, DC	64,293		28,255		44,743		1,299		—		28,255		46,042		74,297		(316		)	10/2/2017	1974
22	1211 Connecticut Avenue, NW	Washington, DC	27,906		30,388		24,667		220		—		30,388		24,887		55,275		(176		)	10/2/2017	1967
23	1401 K Street, NW	Washington, DC	25,501		29,215		34,656		1,194		—		29,215		35,850		65,065		(291		)	10/2/2017	1929
24	440 First Street, NW	Washington, DC	—		27,903		38,624		683		—		27,903		39,307		67,210		(241		)	10/2/2017	1982
25	500 First Street, NW	Washington, DC	—		30,478		15,660		—		—		30,478		15,660		46,138		(112		)	10/2/2017	1969
26	840 First Street, NE	Washington, DC	36,085		42,727		73,249		—		—		42,727		73,249		115,976		(458		)	10/2/2017	2003
27	7850 Southwest 6th Court	Plantation, FL	—		4,800		30,592		383		—		4,800		30,975		35,775		(5,224		)	5/12/2011	1999
28	8900 Grand Oak Circle	Tampa, FL	8,391		1,100		11,773		169		—		1,100		11,942		13,042		(2,169		)	10/15/2010	1994



					Initial Cost to Company			Costs Capitalized Subsequent to Acquisition			Cost amount carried at Close of Period
	Property	Location	Encumbrances ⁽¹⁾		Land	Buildings and Equipment		Costs Capitalized Subsequent to Acquisition	Impairments/ Writedowns		Land	Buildings and Equipment	Total ⁽²⁾	Accumulated Depreciation ⁽³⁾		Date(s) Acquired	Original Construction Date(s)
29	181 Spring Street NW	Atlanta, GA	$	—	5,717	$	20,017	136	$	—	5,717	20,153	25,871	(2,719	)	7/25/2012	2007
30	Corporate Square	Atlanta, GA	—		3,996	29,762		27,321	—		3,996	57,083	61,079	(11,541	)	7/16/2004	1967
31	Executive Park	Atlanta, GA	—		1,521	11,826		4,003	—		1,521	15,829	17,350	(5,127	)	7/16/2004	1972
32	One Georgia Center	Atlanta, GA	—		10,250	27,933		3,581	—		10,250	31,514	41,764	(4,576	)	9/30/2011	1968
33	4712 Southpark Boulevard	Ellenwood, GA	—		1,390	19,635		74	—		1,390	19,709	21,099	(2,661	)	7/25/2012	2005
34	1185, 1249 & 1387 S. Vinnell Way	Boise, ID	—		3,390	29,026		802	—		3,390	29,828	33,218	(4,059	)	9/11/2012	1996; 1997; 2002
35	2020 S. Arlington Heights	Arlington Heights, IL	—		1,450	13,160		730	—		1,450	13,890	15,340	(2,746	)	12/29/2009	1988
36	Intech Park	Indianapolis, IN	—		4,170	68,888		3,822	—		4,170	72,710	76,880	(11,657	)	10/14/2011	2000; 2001; 2008
37	400 State Street	Kansas City, KS	—		640	9,932		4,599	—		640	14,531	15,171	(2,559	)	6/16/2010	1971
38	7125 Industrial Road	Florence, KY	—		1,698	11,722		81	—		1,698	11,803	13,501	(1,468	)	12/31/2012	1980
39	251 Causeway Street	Boston, MA	—		5,100	17,293		1,752	—		5,100	19,045	24,145	(3,427	)	8/17/2010	1987
40	75 Pleasant Street	Malden, MA	—		1,050	31,086		159	—		1,050	31,245	32,295	(5,970	)	5/24/2010	2008
41	25 Newport Avenue	Quincy, MA	—		2,700	9,199		1,297	—		2,700	10,496	13,196	(1,662	)	2/16/2011	1985
42	One Montvale Avenue	Stoneham, MA	—		1,670	11,035		2,095	—		1,670	13,130	14,800	(2,308	)	6/16/2010	1945
43	Annapolis Commerce Center	Annapolis, MD	—		4,057	7,665		—	—		4,057	7,665	11,722	(55	)	10/2/2017	1989
44	4201 Patterson Avenue	Baltimore, MD	—		901	8,097		3,976	—		901	12,073	12,974	(4,520	)	10/15/1998	1989
45	Ammendale Commerce Center	Beltsville, MD	—		4,879	9,498		—	—		4,879	9,498	14,377	(70	)	10/2/2017	1987
46	Indian Creek Technology Park	Beltsville, MD	—		8,796	12,093		24	—		8,796	12,117	20,913	(86	)	10/2/2017	1988
47	Gateway 270 West	Clarksburg, MD	—		12,104	9,688		—	—		12,104	9,688	21,792	(64	)	10/2/2017	2002
48	Hillside Center	Columbia, MD	—		3,437	4,228		—	—		3,437	4,228	7,665	(25	)	10/2/2017	2001
49	Snowden Center	Columbia, MD	—		7,955	10,128		54	—		7,955	10,182	18,137	(63	)	10/2/2017	1982
50	TenThreeTwenty	Columbia, MD	—		3,126	16,361		118	—		3,126	16,479	19,605	(103	)	10/2/2017	1982
51	20400 Century Boulevard	Germantown, MD	—		2,305	9,890		1,282	—		2,347	11,130	13,477	(5,296	)	3/31/1997	1995
52	Cloverleaf Center	Germantown, MD	—		11,890	4,639		—	—		11,890	4,639	16,529	(39	)	10/2/2017	2000
53	3300 75th Avenue	Landover, MD	—		4,110	36,371		1,045	—		4,110	37,416	41,526	(7,271	)	2/26/2010	1985
54	1401 Rockville Pike	Rockville, MD	—		3,248	29,258		16,534	—		3,248	45,792	49,040	(17,237	)	2/2/1998	1986
55	2115 East Jefferson Street	Rockville, MD	—		3,349	11,152		328	—		3,349	11,480	14,829	(1,229	)	8/27/2013	1981
56	Metro Park North	Rockville, MD	—		11,159	7,624		—	—		11,159	7,624	18,783	(59	)	10/2/2017	2001



				Initial Cost to Company		Costs Capitalized Subsequent to Acquisition				Cost amount carried at Close of Period
	Property	Location	Encumbrances ⁽¹⁾	Land	Buildings and Equipment	Costs Capitalized Subsequent to Acquisition		Impairments/ Writedowns		Land	Buildings and Equipment	Total ⁽²⁾	Accumulated Depreciation ⁽³⁾		Date(s) Acquired	Original Construction Date(s)
57	Redland 520/530	Rockville, MD	—	12,714	61,377	1,217		—		12,714	62,594	75,308	(384	)	10/2/2017	2008
58	Redland 540	Rockville, MD	—	10,740	17,714	2,028		—		10,740	19,742	30,482	(111	)	10/2/2017	2003
59	Rutherford Business Park	Windsor Mill, MD	—	1,598	10,219	10		—		1,598	10,229	11,827	(1,299	)	11/16/2012	1972
60	Meadows Business Park	Woodlawn, MD	—	3,735	21,509	2,187		—		3,735	23,696	27,431	(3,907	)	2/15/2011	1973
61	11411 E. Jefferson Avenue	Detroit, MI	—	630	18,002	358		—		630	18,360	18,990	(3,460	)	4/23/2010	2009
62	330 2nd Avenue South	Minneapolis, MN	—	3,991	18,186	(4,246	)	(9,260	)	1,489	16,442	17,931	—		7/16/2010	1980
63	Rosedale Corporate Plaza	Roseville, MN	—	672	6,045	1,505		—		672	7,550	8,222	(3,194	)	12/1/1999	1987
64	1300 Summit Street	Kansas City, MO	—	2,776	12,070	253		—		2,776	12,323	15,099	(1,614	)	9/27/2012	1998
65	4241-4300 NE 34th Street	Kansas City, MO	—	1,443	6,193	3,851		—		1,780	9,707	11,487	(3,893	)	3/31/1997	1995
66	1220 Echelon Parkway	Jackson, MS	—	440	25,458	48		—		440	25,506	25,946	(3,459	)	7/25/2012	2009
67	10-12 Celina Avenue	Nashua, NH	—	3,000	14,052	1,545		—		3,000	15,597	18,597	(2,956	)	8/31/2009	1979
68	50 West State Street	Trenton, NJ	—	5,000	38,203	2,620		—		5,000	40,823	45,823	(6,948	)	12/30/2010	1989
69	138 Delaware Avenue	Buffalo, NY	—	4,405	18,899	5,226		—		4,485	24,045	28,530	(11,064	)	3/31/1997	1994
70	Airline Corporate Center	Colonie, NY	—	790	6,400	32		—		790	6,432	7,222	(881	)	6/22/2012	2004
71	5000 Corporate Court	Holtsville, NY	—	6,530	17,711	2,477		—		6,530	20,188	26,718	(3,183	)	8/31/2011	2000
72	305 East 46th Street	New York, NY	—	36,800	66,661	4,438		—		36,800	71,099	107,899	(11,212	)	5/27/2011	1928
73	4600 25th Avenue	Salem, OR	—	6,510	17,973	4,278		—		6,510	22,251	28,761	(4,066	)	12/20/2011	1957
74	Synergy Business Park	Columbia, SC	—	1,439	11,143	4,803		—		1,439	15,946	17,385	(3,718	)	5/10/2006;9/17/2010	1982; 1985
75	One Memphis Place	Memphis, TN	—	1,630	5,645	2,508		—		1,630	8,153	9,783	(1,434	)	9/17/2010	1985
76	701 Clay Road	Waco, TX	—	2,030	8,708	2,555		—		2,060	11,233	13,293	(4,708	)	12/23/1997	1997
77	14660, 14672 & 14668 Lee Road	Chantilly, VA	—	6,966	74,214	294		—		6,966	74,508	81,474	(1,856	)	12/22/2016	1998; 2002; 2006
78	1408 Stephanie Way	Chesapeake, VA	—	1,403	2,555	—		—		1,403	2,555	3,958	(21	)	10/2/2017	1998
79	1434 Crossways	Chesapeake, VA	—	3,617	19,527	276		—		3,617	19,803	23,420	(135	)	10/2/2017	1998
80	1441 Crossways Boulevard	Chesapeake, VA	—	2,485	10,189	—		—		2,485	10,189	12,674	(73	)	10/2/2017	1988
81	535 Independence Parkway	Chesapeake, VA	3,193	2,465	5,801	—		—		2,465	5,801	8,266	(41	)	10/2/2017	1987
82	Crossways	Chesapeake, VA	—	6,522	40,267	—		—		6,522	40,267	46,789	(318	)	10/2/2017	1989
83	Crossways II	Chesapeake, VA	—	1,633	8,035	153		—		1,633	8,188	9,821	(57	)	10/2/2017	1989
84	Greenbrier Circle Corporate Center	Chesapeake, VA	—	4,489	15,149	14		—		4,489	15,163	19,652	(126	)	10/2/2017	1981



					Initial Cost to Company				Costs Capitalized Subsequent to Acquisition					Cost amount carried at Close of Period
	Property	Location	Encumbrances ⁽¹⁾		Land		Buildings and Equipment		Costs Capitalized Subsequent to Acquisition		Impairments/ Writedowns			Land		Buildings and Equipment		Total ⁽²⁾		Accumulated Depreciation ⁽³⁾			Date(s) Acquired	Original Construction Date(s)
85	Greenbrier Technology Center I	Chesapeake, VA	—		2,514		6,102		—		—			2,514		6,102		8,616		(51		)	10/2/2017	1987
86	Greenbrier Technology Center II	Chesapeake, VA	—		2,084		5,581		3		—			2,084		5,584		7,668		(47		)	10/2/2017	1987
87	Greenbrier Towers	Chesapeake, VA	—		3,437		11,241		27		—			3,437		11,268		14,705		(94		)	10/2/2017	1985
88	Enterchange at Meadowville	Chester, VA	—		1,478		9,594		283		—			1,478		9,877		11,355		(1,060		)	8/28/2013	1999
89	3920 Pender Drive	Fairfax, VA	13,620		2,963		12,840		12		—			2,963		12,852		15,815		(1,204		)	3/21/2014	1981
90	Pender Business Park	Fairfax, VA	—		2,529		21,386		193		—			2,529		21,579		24,108		(2,312		)	11/4/2013	2000
91	3201 Jermantown Road	Fairfax, VA	—		5,991		25,619		329		—			5,991		25,948		31,939		(213		)	10/2/2017	1984
92	7987 Ashton Avenue	Manassas, VA	—		1,562		8,253		333		—			1,562		8,586		10,148		(210		)	1/3/2017	1989
93	Gateway II	Norfolk, VA	—		1,194		1,563		—		—			1,194		1,563		2,757		(13		)	10/2/2017	1984
94	Norfolk Business Center	Norfolk, VA	—		2,134		5,430		—		—			2,134		5,430		7,564		(45		)	10/2/2017	1985
95	Norfolk Commerce Park II	Norfolk, VA	—		3,116		10,709		34		—			3,116		10,743		13,859		(76		)	10/2/2017	1990
96	1759 & 1760 Business Center Drive	Reston, VA	—		9,066		78,658		2,413		—			9,066		81,071		90,137		(7,185		)	5/28/2014	1987
97	1775 Wiehle Avenue	Reston, VA	—		4,138		26,120		29		—			4,138		26,149		30,287		(163		)	10/2/2017	2001
98	9960 Mayland Drive	Richmond, VA	—		2,614		15,930		1,844		—			2,614		17,774		20,388		(1,550		)	5/20/2014	1994
99	Aquia Commerce Center	Stafford, VA	—		2,090		7,465		730		—			2,090		8,195		10,285		(1,308		)	6/22/2011	1988; 1999
100	Atlantic Corporate Park	Sterling, VA	—		5,752		29,323		—		—			5,752		29,323		35,075		(183		)	10/2/2017	2008
101	Sterling Business Park Lots 8 & 9	Sterling, VA	—		9,178		44,324		—		—			9,178		44,324		53,502		(277		)	10/2/2017	2016
102	Sterling Park Business Center	Sterling, VA	—		18,935		21,191		63		—			18,935		21,254		40,189		(154		)	10/2/2017	1990
103	65 Bowdoin Street	S. Burlington, VT	—		700		8,416		120		—			700		8,536		9,236		(1,656		)	4/9/2010	2009
104	840 North Broadway	Everett, WA	—		3,360		15,376		1,829		—			3,360		17,205		20,565		(2,504		)	6/28/2012	1985
105	Stevens Center	Richland, WA	—		3,970		17,035		2,431		—			4,042		19,394		23,436		(9,176		)	3/31/1997	1995
106	11050 West Liberty Drive	Milwaukee, WI	—		945		4,539		103		—			945		4,642		5,587		(763		)	6/9/2011	2006
107	882 TJ Jackson Drive	Falling Waters, WV	—		906		3,886		282		—			922		4,152		5,074		(2,110		)	3/31/1997	1993
108	5353 Yellowstone Road	Cheyenne, WY	—		1,915		8,217		550		—			1,950		8,732		10,682		(4,438		)	3/31/1997	1995
			$	183,100	$	628,698	$	2,153,005	$	194,018	$	(9,260	)	$	627,108	$	2,348,613	$	2,975,721	$	(341,848	)

____________________

(1) Represents mortgage debt, net of the unamortized balance of the fair value adjustments and debt issuance costs totaling $47.

(2) Excludes value of real estate intangibles. Aggregate cost for federal income tax purposes is approximately $3,911,604.

(3) Depreciation on building and improvements is provided for periods ranging up to 40 years and on equipment up to 12 years.