Item 2. Properties.

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Item 2. Properties.

At December 31, 2024, we owned or had joint venture interests in 185 commercial real estate properties, aggregating approximately 53.3 million net rentable square feet of primarily premier workplaces, including seven properties under construction/redevelopment totaling approximately 2.3 million net rentable square feet. Our properties consisted of (1) 163 office and life sciences properties (including five properties under construction/redevelopment), (2) 14 retail properties (including one property under construction), (3) seven residential properties (including one property under construction) and (4) one hotel. The table set forth below shows information relating to the properties we owned, or in which we had an ownership interest, at December 31, 2024, and it includes properties held by both consolidated and unconsolidated joint ventures.

PropertiesLocation% Occupied as of December 31, 2024 (1)Number of BuildingsNet Rentable Square Feet
Office
767 Fifth Avenue (The GM Building) (60% ownership)New York, NY92.1%11,970,335
200 Clarendon StreetBoston, MA97.8%11,728,956
601 Lexington Avenue (55% ownership)New York, NY95.7%11,670,502
399 Park AvenueNew York, NY99.9%11,567,470
Salesforce TowerSan Francisco, CA98.0%11,420,682
800 Boylston Street - The Prudential CenterBoston, MA96.4%11,274,927
7 Times Square (formerly Times Square Tower) (55% ownership)New York, NY80.7%11,238,599
100 Federal Street (55% ownership)Boston, MA89.0%11,233,537
Colorado Center (50% ownership) (2)Santa Monica, CA89.6%61,130,066
599 Lexington AvenueNew York, NY95.8%11,106,335
PropertiesLocation% Occupied as of December 31, 2024 (1)Number of BuildingsNet Rentable Square Feet
Santa Monica Business ParkSanta Monica, CA80.6%141,104,967
Reston NextReston, VA92.1%21,063,284
250 West 55th StreetNew York, NY97.4%1966,976
Embarcadero Center FourSan Francisco, CA93.4%1942,640
111 Huntington Avenue - The Prudential CenterBoston, MA100.0%1860,446
200 Fifth Avenue (26.69% ownership) (2)New York, NY100.0%1855,059
Embarcadero Center OneSan Francisco, CA69.6%1837,522
Embarcadero Center TwoSan Francisco, CA88.3%1801,498
Atlantic Wharf Office (55% ownership)Boston, MA95.4%1793,024
Embarcadero Center ThreeSan Francisco, CA83.1%1785,911
Gateway Commons (50% Ownership) (2) (3)South San Francisco, CA70.5%5785,457
Safeco Plaza (33.67% ownership) (2)Seattle, WA83.8%1762,631
Madison CentreSeattle, WA79.5%1755,164
7750 Wisconsin Avenue (50% ownership) (2)Bethesda, MD100.0%1735,573
Dock 72 (50% ownership) (2)Brooklyn, NY42.7%1668,521
100 Causeway Street (50% ownership) (2)Boston, MA96.4%1633,818
South of MarketReston, VA99.6%3624,387
Bay Colony Corporate CenterWaltham, MA77.8%2546,248
Mountain View Research ParkMountain View, CA60.7%15542,264
Reservoir PlaceWaltham, MA36.6%1526,215
Fountain SquareReston, VA95.1%2524,585
680 Folsom StreetSan Francisco, CA59.2%2522,406
901 New York AvenueWashington, DC84.8%1508,130
101 Huntington Avenue - The Prudential CenterBoston, MA99.0%1506,476
145 BroadwayCambridge, MA99.6%1490,086
2100 Pennsylvania AvenueWashington, DC94.2%1475,849
2200 Pennsylvania AvenueWashington, DC94.9%1459,811
One Freedom SquareReston, VA86.0%1427,646
Two Freedom SquareReston, VA99.8%1423,222
140 Kendrick StreetNeedham, MA73.3%3418,600
Market Square North (50% ownership) (2)Washington, DC76.2%1417,298
325 Main StreetCambridge, MA91.2%1415,512
The Hub on Causeway - Podium (50% ownership) (2)Boston, MA94.8%1382,988
One and Two Discovery SquareReston, VA89.7%2366,989
888 Boylston Street - The Prudential CenterBoston, MA100.0%1363,320
Weston Corporate CenterWeston, MA100.0%1356,995
510 Madison AvenueNew York, NY90.1%1352,589
One Reston OverlookReston, VA91.3%1319,519
535 Mission StreetSan Francisco, CA67.8%1307,205
PropertiesLocation% Occupied as of December 31, 2024 (1)Number of BuildingsNet Rentable Square Feet
Waltham Weston Corporate CenterWaltham, MA75.5%1301,611
230 CityPointWaltham, MA97.7%1296,720
Wisconsin Place OfficeChevy Chase, MD47.5%1294,525
17Fifty Presidents StreetReston, VA100.0%1275,809
Reston Corporate Center (4)Reston, VA100.0%2261,046
Democracy TowerReston, VA99.3%1259,441
355 Main StreetCambridge, MA99.3%1256,966
1330 Connecticut AvenueWashington, DC92.3%1252,262
10 CityPointWaltham, MA97.1%1236,570
510 Carnegie CenterPrinceton, NJ65.6%1234,160
500 North Capitol Street, N.W. (30% ownership) (2)Washington, DC98.5%1230,900
90 BroadwayCambridge, MA100.0%1223,771
255 Main StreetCambridge, MA82.5%1215,394
20 CityPointWaltham, MA98.1%1211,476
77 CityPointWaltham, MA92.7%1209,382
Sumner SquareWashington, DC95.6%1208,797
University PlaceCambridge, MA100.0%1195,282
North First Business Park (5)San Jose, CA58.6%5190,636
890 Winter StreetWaltham, MA70.6%1180,159
150 BroadwayCambridge, MA100.0%1177,226
Capital GalleryWashington, DC80.8%1176,824
206 Carnegie CenterPrinceton, NJ—%1161,763
210 Carnegie CenterPrinceton, NJ33.2%1159,468
Kingstowne TwoAlexandria, VA55.8%1156,005
105 BroadwayCambridge, MA100.0%1152,664
212 Carnegie CenterPrinceton, NJ82.4%1148,942
214 Carnegie CenterPrinceton, NJ62.9%1146,799
2440 West El Camino RealMountain View, CA71.5%1142,711
506 Carnegie CenterPrinceton, NJ77.2%1139,050
Two Reston OverlookReston, VA100.0%1134,615
508 Carnegie CenterPrinceton, NJ100.0%1134,433
202 Carnegie CenterPrinceton, NJ71.9%1134,068
804 Carnegie CenterPrinceton, NJ100.0%1130,000
101 Carnegie CenterPrinceton, NJ82.6%1122,791
504 Carnegie CenterPrinceton, NJ100.0%1121,990
502 Carnegie CenterPrinceton, NJ98.6%1121,460
1265 Main Street (50% ownership) (2)Waltham, MA100.0%1120,681
701 Carnegie CenterPrinceton, NJ100.0%1120,000
104 Carnegie CenterPrinceton, NJ35.6%1102,930
103 Carnegie CenterPrinceton, NJ64.6%196,322
Reservoir Place NorthWaltham, MA100.0%173,258
32 Hartwell AvenueLexington, MA100.0%169,154
302 Carnegie CenterPrinceton, NJ100.0%164,926
211 Carnegie CenterPrinceton, NJ—%147,025
92 Hayden AvenueLexington, MA100.0%131,100
PropertiesLocation% Occupied as of December 31, 2024 (1)Number of BuildingsNet Rentable Square Feet
453 Ravendale DriveMountain View, CA100.0%129,620
690 Folsom StreetSan Francisco, CA100.0%126,080
201 Carnegie CenterPrinceton, NJ100.0%—6,500
Subtotal for Office Properties87.9%14645,755,552
Life Sciences
180 CityPointWaltham, MA43.2%1329,195
200 West StreetWaltham, MA86.1%1273,365
125 BroadwayCambridge, MA100.0%1271,000
880 Winter StreetWaltham, MA100.0%1243,618
300 Binney Street (55% ownership)Cambridge, MA93.7%1239,908
751 Gateway (49% ownership) (2)South San Francisco, CA100.0%1230,592
153 & 211 Second AvenueWaltham, MA18.5%2137,545
103 CityPointWaltham, MA—%1112,841
33 Hayden AvenueLexington, MA100.0%180,876
250 Binney StreetCambridge, MA100.0%167,362
100 Hayden AvenueLexington, MA100.0%155,924
Subtotal for Life Sciences Properties77.2%122,042,226
Retail
The Prudential Center (retail shops)Boston, MA89.5%1601,552
Fountain Square RetailReston, VA95.2%1196,421
Kingstowne RetailAlexandria, VA100.0%188,288
Santa Monica Business Park RetailSanta Monica, CA77.2%773,006
Star Market at the Prudential CenterBoston, MA100.0%160,015
Avant RetailReston, VA100.0%126,179
The PointWaltham, MA100.0%116,300
Subtotal for Retail Properties91.6%131,061,761
Residential
Signature at Reston (508 units)Reston, VA94.3%1517,783
Skymark - Reston Next Residential (508 units) (20% ownership) (2)Reston, VA39.0%1417,036
The Skylyne (402 units)Oakland, CA90.8%1330,996
Hub50House (440 units) (50% ownership) (2)Boston, MA94.3%1320,444
Proto Kendall Square (280 units)Cambridge, MA94.3%1166,717
The Lofts at Atlantic Wharf (86 units)Boston, MA98.8%187,096
Subtotal for Residential Properties81.2%(6)61,840,072(7)
Hotel
Boston Marriott Cambridge (437 rooms)Cambridge, MA77.2%(8)1334,260(9)
Subtotal for Hotel Property77.2%1334,260
Subtotal for In-Service Properties87.5%17851,033,871
PropertiesLocation% Occupied as of December 31, 2024 (1)Number of BuildingsNet Rentable Square Feet
Properties Under Construction/Redevelopment (10)
Office
360 Park Avenue South (redevelopment) (71% ownership) (2)New York, NY23.0%1450,000(11)
Reston Next Office Phase IIReston, VA9.0%190,000(12)
725 12th Street (redevelopment)Washington, DC47.0%1320,000(13)
Laboratory/Life Sciences
651 Gateway (redevelopment) (50% ownership) (2)South San Francisco, CA21.0%1327,000(14)
290 Binney Street (55% ownership)Cambridge, MA100.0%1573,000
Residential
121 Broadway Street (439 units)Cambridge, MA—%1492,000
Retail
Reston Next RetailReston, VA13.0%133,000
Subtotal for Properties Under Construction/Redevelopment50.3%(15)72,285,000
Total Portfolio18553,318,871

(1)Represents signed leases for in-service properties for which revenue recognition has commenced in accordance with accounting principles generally accepted in the United States (“GAAP”).

(2)Property is an unconsolidated joint venture.

(3)Includes 681 Gateway, which is a laboratory/life sciences property.

(4)Property was taken out of service on January 1, 2025.

(5)Property is held for redevelopment.

(6)Percentage occupied is not included in the calculation of the Total Portfolio occupancy rate for In-Service Properties as of December 31, 2024.

(7)Includes 61,511 square feet of retail space that is approximately 79.2% occupied as of December 31, 2024. This amount is not included in the calculation of the Total Portfolio occupancy rate for In-Service Properties as of December 31, 2024.

(8)Represents the weighted-average room occupancy for the year ended December 31, 2024. This amount is not included in the calculation of the Total Portfolio occupancy rate for In-Service Properties as of December 31, 2024.

(9)Includes 4,260 square feet of retail space that is 100% occupied as of December 31, 2024. This amount is not included in the calculation of the Total Portfolio occupancy rate for In-Service Properties as of December 31, 2024.

(10)Represents percentage leased as of February 21, 2025, including leases with future commencement dates.

(11)The property was 30% placed in-service as of December 31, 2024.

(12)The property was 6% placed in-service as of December 31, 2024.

(13)We acquired 725 12th Street, on December 27, 2024 for a purchase price, excluding transaction costs, of $34.0 million. Concurrently with the acquisition, a lease was executed for approximately 152,000 square feet of the redeveloped building.

(14)The property was 27% placed in-service as of December 31, 2024 and fully placed in-service on January 2, 2025.

(15)Total percentage occupied excludes Residential.

Percentage Occupied and Average Annualized Revenue per Square Foot for In-Service Properties

The following table sets forth our percentage occupied and average annualized revenue per square foot on a historical basis for our In-Service Properties.

December 31,
20242023202220212020
Percentage occupied (1)87.5%88.4%88.6%88.8%90.1%
Average annualized revenue per square foot (2)$81.21$78.81$75.99$73.76$72.67

(1)Represents signed leases, excluding hotel and residential properties, for which revenue recognition has commenced in accordance with GAAP.

(2)Represents the monthly contractual base rents and recoveries from clients under existing leases as of December 31, 2024, 2023, 2022, 2021 and 2020 multiplied by twelve. These annualized amounts are before rent abatements and include expense reimbursements, which may be estimates as of such date. The aggregate amounts of rent abatements per square foot under existing leases as of December 31, 2024, 2023, 2022, 2021 and 2020 for the succeeding twelve-month period were $2.14, $2.47, $1.56, $2.15, and $1.73, respectively.

Top 20 Clients by Square Feet

Our 20 largest clients by square feet as of December 31, 2024 were as follows:

ClientSquare Feet (1)% of In-Service Portfolio (1)
1.Salesforce891,2312.10%
2.Google836,1101.97%
3.Biogen780,6591.84%
4.Fannie Mae710,1211.67%
5.Akamai Technologies658,5781.55%
6.Snap607,2871.43%
7.Microsoft599,2001.41%
8.Ropes & Gray539,4671.27%
9.Kirkland & Ellis461,4701.09%
10.Integrated Holding Group408,1180.96%
11.Wellington Management405,2250.95%
12.Allen Overy Shearman Sterling384,8130.90%
13.Bain Capital378,2840.89%
14.Marriott367,7870.86%
15.Leidos352,3940.83%
16.Blue Cross Blue Shield347,6180.82%
17.Arnold & Porter Kaye Scholer344,6050.81%
18.WeWork337,4570.79%
19.US Government (2)319,3590.75%
20.Mass Financial Services313,5840.74%

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(1)Amounts are calculated based on our consolidated portfolio square feet, plus our share of the square feet from the unconsolidated joint ventures properties (calculated based on our ownership percentage), minus our partners’ share of square feet from our consolidated joint venture properties (calculated based upon the partners’ percentage ownership interests).

(2)Amount includes approximately 261,046 square feet that expired on December 31, 2024.

Client Diversification

Our client diversification by square feet as of December 31, 2024 was as follows:

Sector% of In-Service Portfolio (1)
Technology & Media21.0%
Legal Services17.1%
Financial Services - all other14.4%
Life Sciences8.9%
Real Estate & Insurance8.7%
Other Professional Services7.6%
Retail6.2%
Financial Services - commercial & investment banking5.7%
Manufacturing4.7%
Government / Public Administration3.0%
Other2.7%

__________________

(1)Amounts are calculated based on our consolidated portfolio square feet, plus our share of the square feet from the unconsolidated joint ventures properties (calculated based on our ownership percentage), minus our partners’ share of square feet from our consolidated joint venture properties (calculated based upon the partners’ percentage ownership interests).

Lease Expirations (1)(2)

Year of Lease ExpirationRentable Square Feet Subject to Expiring LeasesCurrent Annualized Contractual Rent Under Expiring Leases Without Future Step-Ups (3)Current Annualized Contractual Rent Under Expiring Leases Without Future Step-Ups p.s.f. (3)Current Annualized Contractual Rent Under Expiring Leases With Future Step-Ups (4)Current Annualized Contractual Rent Under Expiring Leases With Future Step-Ups p.s.f. (4)Percentage of Total Square Feet
2024 (5)(6)390,847$23,744,643$60.75$23,744,643$60.750.80%
20253,008,859222,083,01773.81223,088,52574.146.16%
20261,864,176162,007,64686.91166,250,78489.183.82%
20272,195,858167,767,97576.40171,678,76378.184.49%
20283,570,229301,652,84184.49322,664,50190.387.31%
20293,734,123286,076,13476.61310,701,50683.217.64%
20302,735,795216,748,85879.23236,311,07186.385.60%
20312,233,713196,900,22388.15214,966,96096.244.57%
20322,885,652221,634,39776.81263,763,75691.415.91%
20333,017,337232,252,97176.97275,703,91791.376.18%
Thereafter16,801,9431,444,160,35185.951,726,132,587102.7334.39%

(1)Includes 100% of unconsolidated joint venture properties. Does not include residential units or the hotel.

(2)Does not include data for leases expiring in a particular year when leases for the same space have already been signed with replacement clients with future commencement dates. In those cases, the data is included in the year in which the future lease with the replacement client expires.

(3)Represents the monthly contractual base rent and recoveries from clients under existing leases as of December 31, 2024 multiplied by twelve. This amount reflects total rent before any rent abatements and includes expense reimbursements, which may be estimates as of such date.

(4)Represents the monthly contractual base rent under expiring leases with future contractual increases upon expiration and recoveries from clients under existing leases as of December 31, 2024 multiplied by twelve. This amount reflects total rent before any rent abatements and includes expense reimbursements, which may be estimates as of such date.

(5)Represents leases that expired on December 31, 2024.

(6)Includes 261,046 square feet related to Reston Corporate Center which was taken out of service on January 1, 2025.

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