GasLog (GLOG-PA) 6-K 5 Aug 21 Management’s Discussion and Analysis of Financial Condition and Results of Operation Financial data

Document and Entity Information

Document and Entity Information	6 Months Ended
	Jun. 30, 2021
Document and Entity Information
Entity Registrant Name	GasLog Ltd.
Entity Central Index Key	0001534126
Document Type	6-K
Document Period End Date	Jun. 30, 2021
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2

Unaudited condensed consolidate

Unaudited condensed consolidated statements of financial position - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Non-current assets
Goodwill	$ 9,511	$ 9,511
Investment in associates	22,429	21,759
Deferred financing costs	3,245	5,150
Other non-current assets	5,570	12,463
Derivative financial instruments, non-current portion	5,101	5,561
Tangible fixed assets	5,326,990	5,028,509
Vessels under construction	78,692	132,839
Right-of-use assets	200,905	203,437
Total non-current assets	5,652,443	5,419,229
Current assets
Trade and other receivables	37,966	36,223
Dividends receivable and other amounts due from related parties	884	1,259
Derivative financial instruments, current portion	472	534
Inventories	8,890	7,564
Prepayments and other current assets	14,825	24,685
Short-term investments	2,500
Cash and cash equivalents	232,054	367,269
Total current assets	297,591	437,534
Total assets	5,950,034	5,856,763
Equity
Preference shares	46	46
Share capital	954	954
Contributed surplus	745,262	759,822
Reserves	15,175	18,667
Treasury shares		(1,340)
Accumulated deficit	(79,630)	(132,780)
Equity attributable to owners of the Group	681,807	645,369
Non-controlling interests	984,347	951,768
Total equity	1,666,154	1,597,137
Current liabilities
Trade accounts payable	23,295	25,046
Ship management creditors	418	397
Amounts due to related parties	45	164
Derivative financial instruments, current portion	33,393	35,415
Other payables and accruals	148,119	143,057
Borrowings, current portion	555,775	245,626
Lease liability, current portion	9,950	9,644
Total current liabilities	770,995	459,349
Non-current liabilities
Derivative financial instruments, non-current portion	48,679	78,440
Borrowings, non-current portion	3,273,473	3,527,595
Lease liability, non-current portion	183,608	186,526
Other non-current liabilities	7,125	7,716
Total non-current liabilities	3,512,885	3,800,277
Total equity and liabilities	$ 5,950,034	$ 5,856,763

Unaudited condensed consolida_2

Unaudited condensed consolidated statements of profit or loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Unaudited condensed consolidated statements of profit or loss
Revenues	$ 173,010	$ 158,861	$ 378,337	$ 324,758
Voyage expenses and commissions	(5,681)	(5,442)	(9,593)	(12,915)
Vessel operating and supervision costs	(40,688)	(32,605)	(79,941)	(67,657)
Depreciation	(48,493)	(43,647)	(96,183)	(85,144)
General and administrative expenses	(13,498)	(11,154)	(25,240)	(20,775)
Loss on disposal of non-current assets		(572)		(572)
Impairment loss on vessels		(22,454)		(22,454)
Profit from operations	64,650	42,987	167,380	115,241
Financial costs	(51,216)	(43,557)	(90,604)	(84,998)
Financial income	34	177	86	645
(Loss)/gain on derivatives	(6,310)	(13,467)	13,973	(84,591)
Share of profit of associates	553	522	1,120	928
Total other expenses, net	(56,939)	(56,325)	(75,425)	(168,016)
(Loss)/profit for the period	7,711	(13,338)	91,955	(52,775)
Attributable to:
Owners of the Group	(4,784)	(21,348)	53,150	(72,827)
Non-controlling interests	$ 12,495	$ 8,010	$ 38,805	$ 20,052

Unaudited condensed consolida_3

Unaudited condensed consolidated statements of comprehensive income or loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Unaudited condensed consolidated statements of comprehensive income or loss
(Loss)/profit for the period	$ 7,711	$ (13,338)	$ 91,955	$ (52,775)
Items that may be reclassified subsequently to profit or loss:
Effective portion of changes in fair value of cash flow hedges, net of amounts recycled to profit or loss	995	1,881	(103)	(2,229)
Other comprehensive income/(loss) for the period	995	1,881	(103)	(2,229)
Total comprehensive (loss)/income for the period	8,706	(11,457)	91,852	(55,004)
Attributable to:
Owners of the Group	(3,789)	(19,467)	53,047	(75,056)
Non-controlling interests	$ 12,495	$ 8,010	$ 38,805	$ 20,052

Unaudited condensed consolida_4

Unaudited condensed consolidated statements of changes in equity - USD ($) $ in Thousands	Common shares/unitsShare capital	Preference shares/unitsShare capital	Contributed surplus	Reserves	Treasury shares	Accumulated deficit	Attributable to owners of the Group	Non-controlling interests	Total
Balance at beginning of period at Dec. 31, 2019	$ 810	$ 46	$ 760,671	$ 16,799	$ (2,159)	$ (87,832)	$ 688,335	$ 961,518	$ 1,649,853
Proceeds from private placement, net of offering costs	144		34,856				35,000	(114)	34,886
Dividend paid (common and preference shares) (Note 13)			(21,149)				(21,149)	(37,322)	(58,471)
Share-based compensation, net of accrued dividend				2,714			2,714		2,714
Settlement of share-based compensation				(2,445)	2,441		(4)		(4)
Treasury shares, net or GasLog Partners' common units					(2,000)		(2,000)	(996)	(2,996)
(Loss)/profit for the period						(72,827)	(72,827)	20,052	(52,775)
Other comprehensive loss for the period				(2,229)			(2,229)		(2,229)
Total comprehensive (loss)/income for the period				(2,229)		(72,827)	(75,056)	20,052	(55,004)
Balance at the end of the period at Jun. 30, 2020	954	46	774,378	14,839	(1,718)	(160,659)	627,840	943,138	1,570,978
Balance at beginning of period at Dec. 31, 2020	954	46	759,822	18,667	(1,340)	(132,780)	645,369	951,768	1,597,137
Net proceeds from GasLog Partners' public offerings								9,593	9,593
Dividend paid (common and preference shares) (Note 13)			(14,560)				(14,560)	(15,819)	(30,379)
Share-based compensation, net of accrued dividend				3,145			3,145		3,145
Settlement of share-based compensation				(6,534)	$ 1,340		(5,194)		(5,194)
(Loss)/profit for the period						53,150	53,150	38,805	91,955
Other comprehensive loss for the period				(103)			(103)		(103)
Total comprehensive (loss)/income for the period				(103)		53,150	53,047	38,805	91,852
Balance at the end of the period at Jun. 30, 2021	$ 954	$ 46	$ 745,262	$ 15,175		$ (79,630)	$ 681,807	$ 984,347	$ 1,666,154

Unaudited condensed consolida_5

Unaudited condensed consolidated statements of cash flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
(Loss)/profit for the period	$ 91,955	$ (52,775)
Adjustments for:
Depreciation	96,183	85,144
Impairment loss on vessels		22,454
Loss on disposal of non-current assets		572
Share of profit of associates	(1,120)	(928)
Financial income	(86)	(645)
Financial costs	90,604	84,998
Loss (gain) on derivatives (excluding realized loss on forward foreign exchange contracts held for trading)	(13,918)	83,854	[1]
Share-based compensation	3,236	2,992
Adjusted profit	266,854	225,666
Movements in working capital	2,558	(17,282)	[1]
Net cash provided by operating activities	269,412	208,384	[1]
Cash flows from investing activities:
Payments for tangible fixed assets and vessels under construction	(333,461)	(374,605)
Payments for right-of-use assets		(2,738)
Dividends received from associate	825	900
Purchase of short-term investments	(2,500)
Maturity of short-term investments		4,500
Financial income received	86	764
Net cash used in investing activities	(335,050)	(371,179)
Cash flows from financing activities:
Proceeds from loans	318,913	401,911
Loan and bond repayments	(266,770)	(150,508)
Payment for bond repurchase at a premium		(1,937)
Payment for interest rate swaps termination		(10,811)
Proceeds from entering into interest rate swaps		10,770
Interest paid	(88,407)	(86,656)	[1]
Loan/bond modification costs related to the Transaction (as defined in Note 1)	(15,652)
Payment of cash collaterals for swaps	(4,480)	(80,530)	[1]
Release of cash collaterals for swaps	19,717	31,650	[1]
Payment of loan and bond issuance costs	(4,708)	(7,605)
Loan issuance costs received	379
Payment of equity raising costs	(124)	(15)
Proceeds from GasLog Partners' common unit offerings (net of underwriting discounts and commissions)	10,000
Proceeds from private placement		36,000
Dividends paid	(32,895)	(55,955)
Payment for cross currency swaps' ("CCSs") termination/modification		(4,051)
Purchase of treasury shares or GasLog Partners' common units		(2,996)
Payments for lease liability	(5,498)	(5,182)
Net cash provided by/(used in) financing activities	(69,525)	74,085	[1]
Effects of exchange rate changes on cash and cash equivalents	(52)	(2,123)
Decrease in cash and cash equivalents	(135,215)	(90,833)
Cash and cash equivalents, beginning of the period	367,269	263,747
Cash and cash equivalents, end of the period	$ 232,054	$ 172,914
[1]	Restated so as to reflect a change in accounting policy introduced on January 1, 2021, with respect to the reclassification of interest paid and movements of cash collaterals for swaps (Note 2)

Unaudited condensed consolida_6

Unaudited condensed consolidated statements of cash flows (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Non-cash investing and financing activities
Capital expenditures included in liabilities at the end of the period	$ 16,911	$ 20,215
Capital expenditures included in liabilities at the end of the period - Right-of-use assets	169	3,045
Receivable from related parties - Disposal of non-current assets		2,457
Equity raising costs included in liabilities at the end of the period	283	1,113
Loan issuance costs included in liabilities at the end of the period	712	335
Dividend declared included in liabilities at the end of the period		2,516
Liabilities related to leases at the end of the period	$ 3	$ 336

Organization and Operations

Organization and Operations	6 Months Ended
	Jun. 30, 2021
Organization and Operations
Organization and Operations	1. Organization and Operations GasLog Ltd. (“GasLog”) was incorporated in Bermuda on July 16, 2003. GasLog and its subsidiaries (the “Group”) are primarily engaged in the ownership, operation and management of vessels in the liquefied natural gas (“LNG”) market, providing maritime services for the transportation of LNG on a worldwide basis and LNG vessel management services. The Group conducts its operations through its vessel-owning subsidiaries and through its vessel management services subsidiary. The Group’s operations are carried out from offices in Piraeus, London and Singapore. The registered office of GasLog is Clarendon House, 2 Church Street, Hamilton HM 11, Bermuda. On February 21, 2021, GasLog entered into an agreement and plan of merger (the “Merger Agreement”) with BlackRock’s Global Energy & Power Infrastructure Team (collectively, “GEPIF”), pursuant to which GEPIF acquired all of the outstanding common shares of GasLog Ltd. that were not held by certain existing shareholders of GasLog Ltd. for a purchase price of $5.80 in cash per share (the “Transaction”). On June 4, 2021, the special general meeting of shareholders (the “Special Meeting”) was held and approved (i) the previously announced Merger Agreement, (ii) the merger and (iii) the statutory merger agreement contemplated by the Merger Agreement. Trading in GasLog’s common shares on the New York Stock Exchange (“NYSE”) was suspended and the delisting of the common shares from the NYSE became effective on June 21, 2021. GasLog’s 8.75% Series A Cumulative Redeemable Perpetual Preference Shares remain outstanding and continue to trade in the NYSE. Following the consummation of the Transaction on June 9, 2021, the Company, GEPIF, Blenheim Holdings Ltd., Blenheim Special Investments Holding Ltd. and Olympic LNG Investments Ltd. (the “Rolling Shareholders”) entered into a shareholders’ agreement with respect to the governance of the Company (the “Shareholders’ Agreement”). Pursuant to the Shareholders’ Agreement, the board of directors of the Company were reduced to As of June 30, 2021, GasLog held a 33.3% ownership interest (including the 2% interest through general partner units) in GasLog Partners LP (“GasLog Partners” or the “Partnership”) and, as a result of its ownership of the general partner and the fact that the general partner elects the majority of the Partnership’s directors in accordance with the Partnership Agreement, GasLog has the ability to control the Partnership’s affairs and policies. Consequently, GasLog Partners is consolidated in the Group’s financial statements. The accompanying unaudited condensed consolidated financial statements include the financial statements of GasLog and its subsidiaries. All subsidiaries included in the unaudited condensed consolidated financial statements are 100% held (either directly or indirectly) by GasLog, except for GasLog Partners and its subsidiaries. In comparison to the Group’s structure for the year ended December 31, 2020, no new subsidiaries were established or acquired in the three and six months ended June 30, 2021.

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2021
Basis of Presentation
Basis of Presentation	2. Basis of Presentation These unaudited condensed consolidated financial statements have been prepared in accordance with International Accounting Standard (“IAS”) 34 Interim Financial Reporting The critical accounting judgments and key sources of estimation uncertainty were disclosed in the Company’s annual consolidated financial statements for the year ended December 31, 2020 and remain unchanged. The unaudited condensed consolidated financial statements are expressed in U.S. dollars (“USD”), which is the functional currency of all of the subsidiaries in the Group because their vessels operate in international shipping markets in which revenues and expenses are primarily settled in USD, and the Group’s most significant assets and liabilities are paid for and settled in USD. The financial statements are prepared on the historical cost basis, except for the revaluation of derivative financial instruments. The same accounting policies and methods of computation have been followed in these unaudited condensed consolidated financial statements as were applied in the preparation of the Group’s financial statements for the year ended December 31, 2020. Until December 31, 2020, interest paid and movements of cash collaterals for swaps were presented in the consolidated statement of cash flows under cash provided by operating activities. IAS 7 Cash Flow Statement General Presentation and Disclosures ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2020 ​ As previously reported Adjustments As restated Net cash provided by operating activities 72,848 135,536 208,384 Net cash used in investing activities (371,179) — (371,179) Net cash provided by financing activities 209,621 (135,536) 74,085 Effects of exchange rate changes on cash and cash equivalents (2,123) — (2,123) Decrease in cash and cash equivalents (90,833) — (90,833) ​ On August 5, 2021, GasLog’s board of directors authorized the unaudited condensed consolidated financial statements for issuance. As of June 30, 2021, GasLog’s current assets totaled $297,591, while current liabilities totaled $770,995, resulting in a negative working capital position of $473,404. Current liabilities include $315,000 relating to the 8.875% senior unsecured notes due in 2022 (the “8.875% Senior Notes”) which will mature on March 22, 2022 (and we plan to refinance in due course) and $61,406 of unearned revenue in relation to hires received in advance of June 30, 2021 (which represents a non-cash liability that will be recognized as revenue in July as the services are rendered). Management monitors the Company’s liquidity position throughout the year to ensure that it has access to sufficient funds to meet its forecast cash requirements, including newbuilding and debt service commitments, and to monitor compliance with the financial covenants within its loan and bond facilities. Considering the volatile commercial and financial market conditions experienced throughout 2020 due to the COVID-19 pandemic and the continued uncertainty surrounding the long-term impact of the pandemic, management anticipates that our primary sources of funds for at least twelve months from the date of this report will be available cash, cash from operations and existing borrowings. Management believes that these anticipated sources of funds will be sufficient for the Company to meet its liquidity needs and to comply with its banking covenants for at least twelve months from the date of this report and therefore it is appropriate to prepare the financial statements on a going concern basis. In relation to the 8.875% Senior Notes that mature on March 22, 2022, the Company is exploring all options available and has productive discussions with financiers to complete this refinancing on time subject to market conditions. In addition, the Company may enter into new debt facilities in the future, as well as equity or debt instruments, although there can be no assurance that the Company will be able to obtain additional financings on terms acceptable to the Company, which will also depend on financial, commercial and other factors that are beyond the Company’s control. Adoption of new and revised IFRS (a) Standards and interpretations adopted in the current period In August 2020, the IASB issued the Phase 2 amendments to IFRS 9 Financial Instruments Financial Instruments: Disclosures (b) Standards and amendments in issue not yet adopted In January 2020, the IASB issued a narrow-scope amendment to IAS 1 Presentation of Financial Statements Accounting Policies, Changes in Accounting Estimates and Errors

Investment in Associates

Investment in Associates	6 Months Ended
	Jun. 30, 2021
Investment in Associates
Investment in Associates	3. Investment in Associates The movements in investment in associates are reported in the following table: ​ ​ ​ ​ ​ June 30, 2021 As of January 1, 2021 21,759 Share of profit of associates 1,120 Dividend declared (450) As of June 30, 2021 22,429 ​

Tangible Fixed Assets and Vesse

Tangible Fixed Assets and Vessels Under Construction	6 Months Ended
	Jun. 30, 2021
Tangible Fixed Assets and Vessels Under Construction
Tangible Fixed Assets and Vessels Under Construction	4. Tangible Fixed Assets and Vessels Under Construction The movements in tangible fixed assets and vessels under construction are reported in the following table: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Office property ​ Total ​ ​ ​ ​ ​ ​ and other ​ tangible fixed ​ Vessels under ​ Vessels tangible assets assets construction Cost ​ ​ As of January 1, 2021 6,078,041 33,380 ​ 6,111,421 ​ 132,839 Additions ​ 11,647 ​ 1,889 ​ 13,536 ​ 321,563 Transfer from vessels under construction ​ 375,710 ​ — ​ 375,710 ​ (375,710) Fully amortized fixed assets (8,626) — ​ (8,626) ​ — As of June 30, 2021 6,456,772 35,269 ​ 6,492,041 ​ 78,692 ​ ​ ​ ​ ​ ​ ​ ​ ​ Accumulated depreciation ​ ​ ​ ​ ​ ​ ​ ​ As of January 1, 2021 ​ 1,076,867 ​ 6,045 ​ 1,082,912 ​ — Depreciation expense 90,446 319 ​ 90,765 ​ — Fully amortized fixed assets ​ (8,626) ​ — ​ (8,626) ​ — As of June 30, 2021 1,158,687 6,364 ​ 1,165,051 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ Net book value ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2020 5,001,174 27,335 ​ 5,028,509 ​ 132,839 As of June 30, 2021 ​ 5,298,085 ​ 28,905 ​ 5,326,990 ​ 78,692 ​ Vessels with an aggregate carrying amount of $5,298,085 as of June 30, 2021 (December 31, 2020: $5,001,174) have been pledged as collateral under the terms of the Group’s credit facilities. As of June 30, 2021, the Company concluded that there were no events or circumstances triggering the existence of potential impairment or reversal of impairment of its vessels. Vessels under construction As of June 30, 2021, GasLog has the following newbuilding on order at Samsung Heavy Industries Co., Ltd. (“Samsung”): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cargo Capacity ​ ​ Date of ​ Estimated ​ cubic meters LNG Carrier agreement delivery (“cbm”) Hull No. 2312 December 2018 Q3 2021 180,000 ​ Vessels under construction represent scheduled advance payments to the shipyards as well as certain capitalized expenditures.

Leases

Leases	6 Months Ended
	Jun. 30, 2021
Leases
Leases	5. Leases The movements in right-of-use assets are reported in the following table: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Vessels’ ​ ​ ​ ​ ​ ​ Right-of-Use Assets Vessel Equipment Properties Other Total As of January 1, 2021 197,668 1,437 4,258 74 203,437 Additions, net — 1,014 1,914 (42) 2,886 Depreciation expense (4,110) (643) (651) (14) (5,418) As of June 30, 2021 193,558 1,808 5,521 18 200,905 ​ An analysis of the lease liabilities is as follows: ​ ​ ​ ​ ​ Lease Liabilities As of January 1, 2021 196,170 Additions, net 2,886 Lease charge (Note 16) 4,826 Payments (10,324) As of June 30, 2021 193,558 Lease liability, current portion 9,950 Lease liability, non-current portion 183,608 Total 193,558 ​

Other Non-Current Assets

Other Non-Current Assets	6 Months Ended
	Jun. 30, 2021
Other Non-Current Assets
Other Non-Current Assets	6. Other Non-Current Assets Other non-current assets consist of the following: ​ ​ ​ ​ ​ ​ ​ December 31, 2020 June 30, 2021 Various guarantees ​ 289 ​ 288 Other long-term assets ​ 5,378 ​ 5,069 Cash collaterals on swaps 6,796 213 Total 12,463 5,570 ​ Cash collaterals on swaps represent cash deposited for the Group’s interest rate swaps and CCSs, being the difference between their fair value and an agreed threshold. An amount of $8,017 of cash collaterals has been included in Prepayments and other current assets (December 31, 2020: $16,671).

Borrowings

Borrowings	6 Months Ended
	Jun. 30, 2021
Borrowings
Borrowings	7. Borrowings An analysis of the borrowings is as follows: ​ ​ ​ ​ ​ ​ ​ December 31, 2020 June 30, 2021 Amounts due within one year 258,262 569,009 Less: unamortized premium — 472 Less: unamortized deferred loan/bond issuance costs ​ (12,636) ​ (13,706) Borrowings, current portion 245,626 555,775 Amounts due after one year 3,583,447 3,324,636 Less: unamortized premium 797 — Less: unamortized deferred loan/bond issuance costs (56,649) (51,163) Borrowings, non-current portion 3,527,595 3,273,473 Total 3,773,221 3,829,248 ​ Loans The main terms of the Group’s loan facilities in existence as of December 31, 2020, have been disclosed in the annual audited consolidated financial statements for the year ended December 31, 2020. Refer to Note 13 “Borrowings”. On January 22, 2021, GasLog refinanced through a sale-and-leaseback transaction the GasLog Houston eight The facility includes customary respective covenants, and among other restrictions the facility includes a fair market value covenant pursuant to which the lender may request additional security under the facility if the aggregate fair market value of the collateral vessel (without taking into account any charter arrangements) were to fall below 100% of the aggregate outstanding principal balance through December 31, 2022 (110% thereafter). The Group was in compliance with the required minimum security coverage as of June 30, 2021. During the six months ended June 30, 2021, the Group drew down $152,955 under the facility signed on December 12, 2019 with 13 international banks to provide debt funding for its current newbuilding program (the “Newbuilding Facility”) to partially finance the delivery of the GasLog Wellington The carrying amount of the Group’s credit facilities recognized in the unaudited condensed consolidated financial statements approximates its fair value after adjusting for the unamortized loan/bond issuance costs. Bonds The main terms of the Group’s bonds have been disclosed in the annual audited consolidated financial statements for the year ended December 31, 2020. Refer to Note 13 “Borrowings”. The carrying amount under the Norwegian Kroner (“NOK”) bond maturing in 2024 (the “NOK 2024 Bonds”), net of unamortized financing costs and unamortized premium, as of June 30, 2021 is $103,955 (carrying amount under the NOK 2024 Bonds as of December 31, 2020: $104,017) while their fair value is $107,352 based on a USD/NOK exchange rate of 0.1168 as of June 30, 2021 (December 31,2020 : $96,581, based on a USD/NOK exchange rate of 0.1170). The carrying amount under the 8.875% Senior Notes, net of unamortized financing costs and premium as of June 30, 2021, is $314,232 (December 31, 2020: $313,773). The Group was in compliance with its financial covenants as of June 30, 2021.

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2021
Related Party Transactions
Related Party Transactions	8. Related Party Transactions The Group had the following balances with related parties which have been included in the unaudited condensed consolidated statements of financial position: Current Assets Dividends receivable and other amounts due from related parties ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2020 2021 Dividends receivable from associate (Note 3) 1,250 875 Other receivables 9 9 Total 1,259 884 ​ Current Liabilities Amounts due to related parties ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2020 2021 Ship management creditors 124 146 Amounts due to related parties 164 45 ​ Ship management creditors’ liability comprises cash collected from Egypt LNG Shipping Ltd. to cover the obligations of its vessel under the Group’s management. Amounts due to related parties of $45 as of June 30, 2021 (December 31, 2020: $164) are expenses paid by a related party on behalf of the Group and payables to other related parties for the office lease and other operating expenses.

Revenues from Contracts with Cu

Revenues from Contracts with Customers	6 Months Ended
	Jun. 30, 2021
Revenues from Contracts with Customers
Revenues from Contracts with Customers	9. Revenues from Contracts with Customers The Group has recognized the following amounts relating to revenues: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the three months ended ​ For the six months ended ​ June 30, 2020 June 30, 2021 June 30, 2020 June 30, 2021 Revenues from long-term fleet ​ 117,096 ​ 115,522 ​ 227,325 ​ 233,681 Revenues from spot fleet ​ 41,565 ​ 57,293 ​ 97,041 ​ 144,256 Revenues from vessel management services 200 195 392 400 Total 158,861 173,010 324,758 378,337 ​ Management allocates vessel revenues to two categories: a) spot fleet and b) long-term fleet, which reflects its commercial strategy. Specifically, the spot fleet category contains all vessels that have contracts with initial duration of less than five years . The long-term fleet category contains all vessels that have charter party agreements with initial duration of more than five years . Both categories, exclude optional periods.

General and Administrative Expe

General and Administrative Expenses	6 Months Ended
	Jun. 30, 2021
General and Administrative Expenses
General and Administrative Expenses	10. General and Administrative Expenses An analysis of general and administrative expenses is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the three months ended ​ For the six months ended ​ June 30, 2020 June 30, 2021 June 30, 2020 June 30, 2021 Employee costs 6,275 4,417 ​ 11,709 9,199 Share-based compensation 1,613 2,461 ​ 2,866 3,099 Other expenses 3,266 6,620 ​ 6,200 12,942 Total 11,154 13,498 ​ 20,775 25,240 ​ Other expenses include legal and professional costs relating to the Transaction of $3,084 and $6,801 for the three and six months ended June 30, 2021, respectively (nil for the three and six months ended June 30, 2020). GasLog had granted to executives, managers and certain employees of the Group, Restricted Stock Units (“RSUs”), Stock Appreciation Rights or Stock Options (collectively, the “SARs”) and Performance Stock Units (“PSUs”) in accordance with its 2013 Omnibus Incentive Compensation Plan (the “Plan”). The terms of the Plan and the assumptions for the valuation of the RSUs, the SARs and the PSUs have been disclosed in the annual audited consolidated financial statements for the year ended December 31, 2020. Refer to Note 22 “Share-Based Compensation”. Following the consummation of the Transaction, the previously unvested RSUs and PSUs vested; the PSUs vested assuming 100% achievement of performance conditions. In addition, all SARs have been cancelled and replaced by cash consideration. For the three and six months ended June 30, 2021, the accelerated amortization for the stock plan termination amounted to $1,949 (nil for the three and six months ended June 30, 2020).

Vessel Operating and Supervisio

Vessel Operating and Supervision Costs	6 Months Ended
	Jun. 30, 2021
Vessel Operating and Supervision Costs
Vessel Operating and Supervision Costs	11. Vessel Operating and Supervision Costs An analysis of vessel operating and supervision costs is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the three months ended ​ For the six months ended ​ June 30, 2020 June 30, 2021 June 30, 2020 June 30, 2021 Crew and vessel management employee costs ​ 20,548 ​ 24,819 ​ 40,936 ​ 49,661 Technical maintenance expenses 7,583 9,573 17,304 17,749 Other vessel operating expenses 4,474 6,296 9,417 12,531 Total 32,605 40,688 67,657 79,941 ​

Other Payables and Accruals

Other Payables and Accruals	6 Months Ended
	Jun. 30, 2021
Other Payables and Accruals
Other Payables and Accruals	12. Other Payables and Accruals An analysis of other payables and accruals is as follows: ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2020 2021 Unearned revenue 59,612 61,406 Accrued off-hire 5,886 10,816 Accrued purchases 9,867 15,924 Accrued interest 33,600 27,029 Other accruals 34,092 32,944 Total 143,057 148,119 ​

Share Capital and Preference Sh

Share Capital and Preference Shares	6 Months Ended
	Jun. 30, 2021
Share Capital and Preference Shares
Share Capital and Preference Shares	13. Share Capital and Preference Shares GasLog’s authorized share capital consists of 500,000,000 shares with a par value of $0.01 per share. As of June 30, 2021, the share capital consisted of 95,389,062 issued and outstanding outstanding Dividend distributions GasLog’s dividend distributions for the period ending June 30, 2021, are presented in the following table: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Declaration date Type of shares Dividend per share Payment date Amount paid February 21, 2021 Common ​ $ 0.05 ​ ​ March 11, 2021 4,759 March 11, 2021 Preference ​ $ 0.546875 ​ ​ March 31, 2021 2,516 May 5, 2021 Common ​ $ 0.05 ​ May 26, 2021 4,769 May 13, 2021 Preference ​ $ 0.546875 ​ June 30, 2021 2,516 Total ​ ​ 14,560 ​

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2021
Commitments and Contingencies
Commitments and Contingencies	14. Commitments and Contingencies (a) Commitments relating to the vessel under construction (Note 4) as of June 30, 2021, payable to Samsung were as follows: ​ ​ ​ ​ ​ June 30, 2021 Period ​ ​ Not later than one year 150,880 Total 150,880 ​ (b) Future gross minimum revenues receivable in relation to non-cancellable time charter agreements for vessels in operation, including a vessel under a lease (Note 5), as of June 30, 2021 are as follows ( 30 off-hire days are assumed when each vessel will undergo scheduled dry-docking; in addition, early delivery of the vessels by the charterers or any exercise of the charterers’ options to extend the terms of the charters are not accounted for): ​ ​ ​ ​ ​ June 30, 2021 Period ​ ​ Not later than one year 518,333 Later than one year and not later than two years 390,923 Later than two years and not later than three years 344,838 Later than three years and not later than four years ​ 306,158 Later than four years and not later than five years ​ 280,647 Later than five years 451,715 Total 2,292,614 ​ Future gross minimum lease payments disclosed in the above table exclude the lease payments of the vessel that is under construction as of June 30, 2021 (Note 4). (c) In September 2017 (in addition to the seven existing maintenance agreements signed in 2015 in relation to GasLog vessels) and later in June 2021, GasLog LNG Services Ltd. entered into further maintenance agreements with Wartsila Greece S.A. (“Wartsila”) in respect of eighteen additional GasLog LNG carriers in total. In July 2018, GasLog LNG Services Ltd. renewed the maintenance agreements signed in 2015 with Wartsila. The agreements ensure dynamic maintenance planning, technical support, security of spare parts supply, specialist technical personnel and performance monitoring. (d) In March 2019, GasLog LNG Services entered into an agreement with Samsung in respect of nineteen of GasLog’s vessels. The agreement covers the supply of ballast water management systems on board the vessels by Samsung and associated field, commissioning and engineering services for a firm period of six years . As of June 30, 2021, ballast water management systems had been installed on thirteen out of the nineteen vessels. Various claims, suits and complaints, including those involving government regulations, arise in the ordinary course of the shipping business. In addition, losses may arise from disputes with charterers, environmental claims, agents and insurers and from claims with suppliers relating to the operations of the Group’s vessels. Currently, management is not aware of any such claims or contingent liabilities requiring disclosure in the unaudited condensed consolidated financial statements.

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2021
Derivative Financial Instruments
Derivative Financial Instruments	15. Derivative Financial Instruments The fair value of the derivative assets is as follows: ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2020 2021 Derivative assets carried at fair value through profit or loss (FVTPL) ​ ​ ​ Forward foreign exchange contracts ​ 327 ​ — Derivative assets designated and effective as hedging instruments carried at fair value ​ ​ Cross-currency swaps 5,768 ​ 5,573 Total 6,095 5,573 Derivative financial instruments, current assets 534 472 Derivative financial instruments, non-current assets 5,561 5,101 Total 6,095 5,573 ​ The fair value of the derivative liabilities is as follows: ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2020 2021 Derivative liabilities carried at fair value through profit or loss (FVTPL) ​ ​ Interest rate swaps 113,855 81,812 Forward foreign exchange contracts ​ — ​ 260 Total 113,855 82,072 Derivative financial instruments, current liability 35,415 33,393 Derivative financial instruments, non-current liability 78,440 48,679 Total 113,855 82,072 ​ Interest rate swap agreements The Group enters into interest rate swap agreements which convert the floating interest rate exposure into a fixed interest rate in order to hedge a portion of the Group’s exposure to fluctuations in prevailing market interest rates. Under the interest rate swaps, the bank counterparty effects quarterly floating-rate payments to the Group for the notional amount based on the USD LIBOR, and the Group effects quarterly payments to the bank on the notional amounts at the respective fixed rates. Interest rate swaps held for trading The principal terms of the Group’s interest rate swaps held for trading as of December 31, 2020, have been disclosed in the annual audited consolidated financial statements for the year ended December 31, 2020. Refer to Note 26 “Derivative Financial Instruments”. In June 2021, the Group novated to ABN Amro Bank N.V. an interest rate swap with HSBC Bank plc originally maturing in July 2025 with notional amount of $33,333. During the six months ended June 30, 2021, the Group did not enter into any new interest rate swaps held for trading. The Group’s interest rate swaps held for trading were not designated as cash flow hedging instruments. The change in the fair value of the interest rate swaps held for trading for the three and six months ended June 30, 2021 amounted to a net gain of $3,718 and a net gain of $32,044, respectively (for the three and six months ended June 30, 2020: a net loss of $9,847 and a net loss of $79,827, respectively), which was recognized against profit or loss in the period incurred and is included in (Loss)/gain on derivatives. During the three and six months ended June 30, 2021, the net gain of $3,718 and $32,044, respectively derived from changes in the LIBOR curve. Cross currency swap agreements The principal terms of the Group’s CCSs designated as cash flow hedging instruments as of December 31, 2020, have been disclosed in the annual audited consolidated financial statements for the year ended December 31, 2020. Refer to Note 26 “Derivative Financial Instruments”. During the six months ended June 30, 2021, the Group did not enter any CCS designated as cash flow hedging instruments. For the three and six months ended June 30, 2021, the effective portion of changes in the fair value of CCSs amounting to a gain of $1,024 and a loss of $153, respectively, has been recognized in Other comprehensive income/(loss) (for the three and six months ended June 30, 2020: a gain of $8,985 and a loss of $11,782, respectively). For the three and six months ended June 30, 2021, a gain of $106 and $157, respectively, was recycled to profit or loss representing the realized gain on CCSs in relation to the interest expenses component of the hedge (for the three and six months ended June 30, 2020: a loss of $240 and $455, respectively). Additionally, for the three and six months ended June 30, 2021, a gain of $77 and a gain of $207, respectively, was recognized in Other comprehensive income/(loss) in relation to the translation of the NOK Bonds in USD as of June 30, 2021 (for the three and six months ended June 30, 2020: a loss of $7,344 and a gain of $9,098, respectively). Forward foreign exchange contracts The Group uses forward foreign exchange contracts to mitigate foreign exchange transaction exposures in Euros (“EUR”). Under these forward foreign exchange contracts, the bank counterparty will effect fixed payments in EUR to the Group and the Group will effect fixed payments in USD to the bank counterparty on the respective settlement dates. All forward foreign exchange contracts are considered by management to be part of economic hedge arrangements but have not been formally designated as such. The principal terms of the forward foreign exchange contracts held for trading as of December 31, 2020, have been disclosed in the annual audited consolidated financial statements for the year ended December 31, 2020. Refer to Note 26 “Derivative Financial Instruments”. During the six months ended June 30, 2021, the Group entered the following forward foreign exchange contracts which remain unsettled as of June 30, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fixed ​ Total Exchange ​ ​ ​ ​ ​ ​ Number of ​ ​ ​ Exchange Rate ​ Amount Company Counterparty Trade Date contracts Settlement Dates (USD/EUR) (in thousands) GasLog ​ ABN Amro Bank N.V. ​ March 2021 3 ​ July-September 2021 1.1964-1.1980 ​ € 7,500 GasLog ​ OCBC ​ March 2021 ​ 3 ​ October-December 2021 ​ 1.1988-1.2000 ​ € 7,500 GasLog ​ DNB ​ June 2021 ​ 5 ​ August-December 2021 ​ 1.1973-1.2000 ​ € 7,500 GasLog ​ Citibank Europe PLC UK ​ June 2021 ​ 6 ​ October 2021-March 2022 ​ 1.1913-1.1955 ​ € 6,000 ​ ​ ​ ​ ​ Total ​ € 28,500 ​ Apart from the abovementioned contracts the Group did not enter any other forward foreign exchange contracts, while 19 contracts expired with staggered maturities from January to June 2021. The Group’s forward foreign exchange contracts were not designated as cash flow hedging instruments as of June 30, 2021. The change in the fair value of these contracts for the three and six months ended June 30, 2021, amounted to a net gain of $331 and a net loss of $587, respectively (for the three and six months ended June 30, 2020: a net gain of $748 and a net loss of $604, respectively), which was recognized against profit or loss in the period incurred and is included in (Loss)/gain on derivatives.

Financial Costs and Loss_(gain)

Financial Costs and Loss/(gain) on Derivatives	6 Months Ended
	Jun. 30, 2021
Financial Costs and Loss/(gain) on Derivatives
Financial Costs and Loss/(gain) on Derivatives	16. Financial Costs and Loss/(gain) on Derivatives An analysis of financial costs and loss/(gain) on derivatives is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the three months ended ​ For the six months ended ​ June 30, 2020 June 30, 2021 June 30, 2020 June 30, 2021 Amortization and write-off of deferred loan/bond issuance costs/premium 3,697 3,603 7,514 10,717 Interest expense on loans 25,147 20,592 51,973 41,364 Interest expense on bonds and realized loss on CCS 8,856 8,608 18,340 17,289 Lease charge 2,526 2,412 5,075 4,826 Loss arising on bond repurchase at a premium — ​ — ​ 1,937 ​ — Other financial costs, net 3,331 16,001 159 16,408 Total financial costs 43,557 51,216 84,998 90,604 ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized loss/(gain) on derivative financial instruments held for trading (Note 15) 9,140 (4,049) 80,472 (31,457) Realized loss on interest rate swaps held for trading 2,731 8,946 3,600 17,653 Realized loss/(gain) on forward foreign exchange contracts held for trading ​ 531 ​ (105) ​ 737 ​ (55) Ineffective portion of cash flow hedges ​ 1,065 ​ 1,518 ​ (218) ​ (114) Total loss/(gain) on derivatives 13,467 6,310 84,591 (13,973) ​ Other financial costs, net includes an amount of $15,652 for the three and six months ended June 30, 2021, respectively relating to fees (bank consent, legal fees, etc.) to obtain the third-party consents and waivers in connection with the de-listing of the Group’s shares from NYSE after the consummation of the Transaction.

Cash Flow Reconciliations

Cash Flow Reconciliations	6 Months Ended
	Jun. 30, 2021
Cash Flow Reconciliations
Cash Flow Reconciliations	17. Cash Flow Reconciliations The reconciliation of the Group’s financing activities for the periods ended June 30, 2020, and June 30, 2021, are presented in the tables below: A reconciliation of borrowings arising from financing activities is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other ​ ​ ​ Deferred ​ ​ ​ ​ ​ ​ ​ ​ comprehensive ​ Non-cash ​ financing ​ ​ ​ Opening balance Cash flows income items costs, assets Borrowings January 1, 2020 ​ 3,147,395 ​ — — — — ​ 3,147,395 Proceeds from loans — 401,911 — — — 401,911 Loan and bond repayments — (150,508) — (8,063) — (158,571) Payment for bond repurchase at a premium ​ — ​ (1,937) ​ — ​ — ​ — ​ (1,937) Additions in deferred loan fees — (7,605) — 982 (1,375) (7,998) Amortization and write-off of deferred loan/bond issuance costs/premium (Note 16) — — — 7,514 — 7,514 Retranslation of the NOK 2024 Bonds in USD — — (9,098) (6,174) — (15,272) June 30, 2020 3,147,395 241,861 (9,098) (5,741) ​ (1,375) 3,373,042 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other ​ ​ ​ Deferred ​ ​ ​ ​ ​ ​ ​ ​ comprehensive ​ Non-cash ​ financing costs, ​ ​ ​ Opening balance Cash flows income items assets Borrowings January 1, 2021 3,773,221 — — — — 3,773,221 Proceeds from loans — 318,913 — — — 318,913 Loan and bond repayments — (266,770) — — — (266,770) Additions in deferred loan fees — (4,329) — (392) (1,905) (6,626) Amortization and write-off of deferred loan/bond issuance costs/premium (Note 16) — — — 10,717 — 10,717 Retranslation of the NOK 2024 Bonds in USD — — (207) — — (207) June 30, 2021 3,773,221 47,814 (207) 10,325 (1,905) 3,829,248 ​ A reconciliation of derivatives arising from financing activities is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ comprehensive ​ ​ ​ Net derivative ​ Opening balance Cash flows loss Non-cash items liabilities January 1, 2020 ​ (45,931) ​ — ​ — ​ — ​ (45,931) Unrealized loss on derivative financial instruments held for trading (Note 16) ​ — ​ — ​ — ​ (80,472) ​ (80,472) Ineffective portion of cash flow hedges (Note 16) — — — 218 218 Payment for interest rate swaps termination ​ — ​ 10,811 ​ — ​ — ​ 10,811 Proceeds from entering into interest rate swaps ​ — ​ (10,770) ​ — ​ — ​ (10,770) Payment for CCS termination/modification ​ — ​ 4,051 ​ — ​ (4,051) ​ — Effective portion of changes in the fair value of derivatives designated as cash flow hedging instruments — — (11,327) — (11,327) June 30, 2020 (45,931) 4,092 (11,327) (84,305) (137,471) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other ​ ​ ​ ​ ​ ​ Opening ​ comprehensive ​ ​ ​ Net derivative ​ balance loss Non-cash items liabilities January 1, 2021 ​ (107,760) ​ — ​ — ​ (107,760) Unrealized gain on derivative financial instruments held for trading (Note 16) — — 31,457 31,457 Ineffective portion of cash flow hedges (Note 16) ​ — ​ — ​ 114 ​ 114 Effective portion of changes in the fair value of derivatives designated as cash flow hedging instruments — (310) — (310) June 30, 2021 (107,760) (310) 31,571 (76,499) ​

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2021
Subsequent Events
Subsequent Events	18. Subsequent Events On August 4, 2021, the board of directors declared a quarterly cash dividend of $0.15 per common share payable on August 11, 2021 to shareholders of record as of August 9, 2021.

Basis of Presentation (Policies

Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2021
Basis of Presentation
Accounting policies and methods of computation followed in interim financial statements	The financial statements are prepared on the historical cost basis, except for the revaluation of derivative financial instruments. The same accounting policies and methods of computation have been followed in these unaudited condensed consolidated financial statements as were applied in the preparation of the Group’s financial statements for the year ended December 31, 2020.
Adoption of new and revised IFRS	Adoption of new and revised IFRS (a) Standards and interpretations adopted in the current period In August 2020, the IASB issued the Phase 2 amendments to IFRS 9 Financial Instruments Financial Instruments: Disclosures (b) Standards and amendments in issue not yet adopted In January 2020, the IASB issued a narrow-scope amendment to IAS 1 Presentation of Financial Statements Accounting Policies, Changes in Accounting Estimates and Errors

Basis of Presentation (Tables)

Basis of Presentation (Tables)	6 Months Ended
	Jun. 30, 2021
Basis of Presentation
Schedule of change in accounting policy related to cash flows	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2020 ​ As previously reported Adjustments As restated Net cash provided by operating activities 72,848 135,536 208,384 Net cash used in investing activities (371,179) — (371,179) Net cash provided by financing activities 209,621 (135,536) 74,085 Effects of exchange rate changes on cash and cash equivalents (2,123) — (2,123) Decrease in cash and cash equivalents (90,833) — (90,833)

Investment in Associates (Table

Investment in Associates (Tables)	6 Months Ended
	Jun. 30, 2021
Investment in Associates
Schedule of movements in investment in associates	​ ​ ​ ​ ​ June 30, 2021 As of January 1, 2021 21,759 Share of profit of associates 1,120 Dividend declared (450) As of June 30, 2021 22,429

Tangible Fixed Assets and Ves_2

Tangible Fixed Assets and Vessels Under Construction (Tables)	6 Months Ended
	Jun. 30, 2021
Tangible Fixed Assets and Vessels Under Construction
Schedule of movements in tangible fixed assets and vessels under construction	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Office property ​ Total ​ ​ ​ ​ ​ ​ and other ​ tangible fixed ​ Vessels under ​ Vessels tangible assets assets construction Cost ​ ​ As of January 1, 2021 6,078,041 33,380 ​ 6,111,421 ​ 132,839 Additions ​ 11,647 ​ 1,889 ​ 13,536 ​ 321,563 Transfer from vessels under construction ​ 375,710 ​ — ​ 375,710 ​ (375,710) Fully amortized fixed assets (8,626) — ​ (8,626) ​ — As of June 30, 2021 6,456,772 35,269 ​ 6,492,041 ​ 78,692 ​ ​ ​ ​ ​ ​ ​ ​ ​ Accumulated depreciation ​ ​ ​ ​ ​ ​ ​ ​ As of January 1, 2021 ​ 1,076,867 ​ 6,045 ​ 1,082,912 ​ — Depreciation expense 90,446 319 ​ 90,765 ​ — Fully amortized fixed assets ​ (8,626) ​ — ​ (8,626) ​ — As of June 30, 2021 1,158,687 6,364 ​ 1,165,051 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ Net book value ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2020 5,001,174 27,335 ​ 5,028,509 ​ 132,839 As of June 30, 2021 ​ 5,298,085 ​ 28,905 ​ 5,326,990 ​ 78,692
Schedule of new buildings on order at Samsung	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cargo Capacity ​ ​ Date of ​ Estimated ​ cubic meters LNG Carrier agreement delivery (“cbm”) Hull No. 2312 December 2018 Q3 2021 180,000

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2021
Leases
Schedule of movements in right-of-use assets	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Vessels’ ​ ​ ​ ​ ​ ​ Right-of-Use Assets Vessel Equipment Properties Other Total As of January 1, 2021 197,668 1,437 4,258 74 203,437 Additions, net — 1,014 1,914 (42) 2,886 Depreciation expense (4,110) (643) (651) (14) (5,418) As of June 30, 2021 193,558 1,808 5,521 18 200,905 ​
Schedule of analysis of lease liabilities	​ ​ ​ ​ ​ Lease Liabilities As of January 1, 2021 196,170 Additions, net 2,886 Lease charge (Note 16) 4,826 Payments (10,324) As of June 30, 2021 193,558 Lease liability, current portion 9,950 Lease liability, non-current portion 183,608 Total 193,558

Other Non-Current Assets (Table

Other Non-Current Assets (Tables)	6 Months Ended
	Jun. 30, 2021
Other Non-Current Assets
Schedule of other non-current assets	​ ​ ​ ​ ​ ​ ​ December 31, 2020 June 30, 2021 Various guarantees ​ 289 ​ 288 Other long-term assets ​ 5,378 ​ 5,069 Cash collaterals on swaps 6,796 213 Total 12,463 5,570

Borrowings (Tables)

Borrowings (Tables)	6 Months Ended
	Jun. 30, 2021
Borrowings
Schedule of borrowings	​ ​ ​ ​ ​ ​ ​ December 31, 2020 June 30, 2021 Amounts due within one year 258,262 569,009 Less: unamortized premium — 472 Less: unamortized deferred loan/bond issuance costs ​ (12,636) ​ (13,706) Borrowings, current portion 245,626 555,775 Amounts due after one year 3,583,447 3,324,636 Less: unamortized premium 797 — Less: unamortized deferred loan/bond issuance costs (56,649) (51,163) Borrowings, non-current portion 3,527,595 3,273,473 Total 3,773,221 3,829,248

Related Party Transactions (Tab

Related Party Transactions (Tables)	6 Months Ended
	Jun. 30, 2021
Related Party Transactions
Schedule of transactions with related parties	Dividends receivable and other amounts due from related parties ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2020 2021 Dividends receivable from associate (Note 3) 1,250 875 Other receivables 9 9 Total 1,259 884 ​ Current Liabilities Amounts due to related parties ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2020 2021 Ship management creditors 124 146 Amounts due to related parties 164 45

Revenues from Contracts with _2

Revenues from Contracts with Customers (Tables)	6 Months Ended
	Jun. 30, 2021
Revenues from Contracts with Customers
Schedule of revenues from contracts with customers	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the three months ended ​ For the six months ended ​ June 30, 2020 June 30, 2021 June 30, 2020 June 30, 2021 Revenues from long-term fleet ​ 117,096 ​ 115,522 ​ 227,325 ​ 233,681 Revenues from spot fleet ​ 41,565 ​ 57,293 ​ 97,041 ​ 144,256 Revenues from vessel management services 200 195 392 400 Total 158,861 173,010 324,758 378,337

General and Administrative Ex_2

General and Administrative Expenses (Tables)	6 Months Ended
	Jun. 30, 2021
General and Administrative Expenses
Schedule of general and administrative expenses	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the three months ended ​ For the six months ended ​ June 30, 2020 June 30, 2021 June 30, 2020 June 30, 2021 Employee costs 6,275 4,417 ​ 11,709 9,199 Share-based compensation 1,613 2,461 ​ 2,866 3,099 Other expenses 3,266 6,620 ​ 6,200 12,942 Total 11,154 13,498 ​ 20,775 25,240

Vessel Operating and Supervis_2

Vessel Operating and Supervision Costs (Tables)	6 Months Ended
	Jun. 30, 2021
Vessel Operating and Supervision Costs
Schedule of vessel operating and supervision costs	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the three months ended ​ For the six months ended ​ June 30, 2020 June 30, 2021 June 30, 2020 June 30, 2021 Crew and vessel management employee costs ​ 20,548 ​ 24,819 ​ 40,936 ​ 49,661 Technical maintenance expenses 7,583 9,573 17,304 17,749 Other vessel operating expenses 4,474 6,296 9,417 12,531 Total 32,605 40,688 67,657 79,941

Other Payables and Accruals (Ta

Other Payables and Accruals (Tables)	6 Months Ended
	Jun. 30, 2021
Other Payables and Accruals
Schedule of other payables and accruals	​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2020 2021 Unearned revenue 59,612 61,406 Accrued off-hire 5,886 10,816 Accrued purchases 9,867 15,924 Accrued interest 33,600 27,029 Other accruals 34,092 32,944 Total 143,057 148,119

Share Capital and Preference _2

Share Capital and Preference Shares (Tables)	6 Months Ended
	Jun. 30, 2021
Share Capital and Preference Shares
Schedule of dividend distributions	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Declaration date Type of shares Dividend per share Payment date Amount paid February 21, 2021 Common ​ $ 0.05 ​ ​ March 11, 2021 4,759 March 11, 2021 Preference ​ $ 0.546875 ​ ​ March 31, 2021 2,516 May 5, 2021 Common ​ $ 0.05 ​ May 26, 2021 4,769 May 13, 2021 Preference ​ $ 0.546875 ​ June 30, 2021 2,516 Total ​ ​ 14,560

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2021
Commitments and Contingencies
Schedule of commitments relating to vessels under construction	​ ​ ​ ​ ​ June 30, 2021 Period ​ ​ Not later than one year 150,880 Total 150,880
Schedule of future gross minimum lease payments in relation to non-cancellable time charter agreements	​ ​ ​ ​ ​ June 30, 2021 Period ​ ​ Not later than one year 518,333 Later than one year and not later than two years 390,923 Later than two years and not later than three years 344,838 Later than three years and not later than four years ​ 306,158 Later than four years and not later than five years ​ 280,647 Later than five years 451,715 Total 2,292,614

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2021
Financial Instruments
Schedule of fair value of the derivative assets	​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2020 2021 Derivative assets carried at fair value through profit or loss (FVTPL) ​ ​ ​ Forward foreign exchange contracts ​ 327 ​ — Derivative assets designated and effective as hedging instruments carried at fair value ​ ​ Cross-currency swaps 5,768 ​ 5,573 Total 6,095 5,573 Derivative financial instruments, current assets 534 472 Derivative financial instruments, non-current assets 5,561 5,101 Total 6,095 5,573
Schedule of fair value of the derivative liabilities	​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2020 2021 Derivative liabilities carried at fair value through profit or loss (FVTPL) ​ ​ Interest rate swaps 113,855 81,812 Forward foreign exchange contracts ​ — ​ 260 Total 113,855 82,072 Derivative financial instruments, current liability 35,415 33,393 Derivative financial instruments, non-current liability 78,440 48,679 Total 113,855 82,072
Forward foreign exchange contracts
Financial Instruments
Schedule of principal terms of instruments held for trading	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fixed ​ Total Exchange ​ ​ ​ ​ ​ ​ Number of ​ ​ ​ Exchange Rate ​ Amount Company Counterparty Trade Date contracts Settlement Dates (USD/EUR) (in thousands) GasLog ​ ABN Amro Bank N.V. ​ March 2021 3 ​ July-September 2021 1.1964-1.1980 ​ € 7,500 GasLog ​ OCBC ​ March 2021 ​ 3 ​ October-December 2021 ​ 1.1988-1.2000 ​ € 7,500 GasLog ​ DNB ​ June 2021 ​ 5 ​ August-December 2021 ​ 1.1973-1.2000 ​ € 7,500 GasLog ​ Citibank Europe PLC UK ​ June 2021 ​ 6 ​ October 2021-March 2022 ​ 1.1913-1.1955 ​ € 6,000 ​ ​ ​ ​ ​ Total ​ € 28,500

Financial Costs and Loss_(gai_2

Financial Costs and Loss/(gain) on Derivatives (Tables)	6 Months Ended
	Jun. 30, 2021
Financial Costs and Loss/(gain) on Derivatives
Financial costs and Loss/(gain) on Derivatives	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the three months ended ​ For the six months ended ​ June 30, 2020 June 30, 2021 June 30, 2020 June 30, 2021 Amortization and write-off of deferred loan/bond issuance costs/premium 3,697 3,603 7,514 10,717 Interest expense on loans 25,147 20,592 51,973 41,364 Interest expense on bonds and realized loss on CCS 8,856 8,608 18,340 17,289 Lease charge 2,526 2,412 5,075 4,826 Loss arising on bond repurchase at a premium — ​ — ​ 1,937 ​ — Other financial costs, net 3,331 16,001 159 16,408 Total financial costs 43,557 51,216 84,998 90,604 ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized loss/(gain) on derivative financial instruments held for trading (Note 15) 9,140 (4,049) 80,472 (31,457) Realized loss on interest rate swaps held for trading 2,731 8,946 3,600 17,653 Realized loss/(gain) on forward foreign exchange contracts held for trading ​ 531 ​ (105) ​ 737 ​ (55) Ineffective portion of cash flow hedges ​ 1,065 ​ 1,518 ​ (218) ​ (114) Total loss/(gain) on derivatives 13,467 6,310 84,591 (13,973)

Cash Flow Reconciliations (Tabl

Cash Flow Reconciliations (Tables)	6 Months Ended
	Jun. 30, 2021
Cash Flow Reconciliations
Schedule of reconciliation of borrowings arising from financing activities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other ​ ​ ​ Deferred ​ ​ ​ ​ ​ ​ ​ ​ comprehensive ​ Non-cash ​ financing ​ ​ ​ Opening balance Cash flows income items costs, assets Borrowings January 1, 2020 ​ 3,147,395 ​ — — — — ​ 3,147,395 Proceeds from loans — 401,911 — — — 401,911 Loan and bond repayments — (150,508) — (8,063) — (158,571) Payment for bond repurchase at a premium ​ — ​ (1,937) ​ — ​ — ​ — ​ (1,937) Additions in deferred loan fees — (7,605) — 982 (1,375) (7,998) Amortization and write-off of deferred loan/bond issuance costs/premium (Note 16) — — — 7,514 — 7,514 Retranslation of the NOK 2024 Bonds in USD — — (9,098) (6,174) — (15,272) June 30, 2020 3,147,395 241,861 (9,098) (5,741) ​ (1,375) 3,373,042 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other ​ ​ ​ Deferred ​ ​ ​ ​ ​ ​ ​ ​ comprehensive ​ Non-cash ​ financing costs, ​ ​ ​ Opening balance Cash flows income items assets Borrowings January 1, 2021 3,773,221 — — — — 3,773,221 Proceeds from loans — 318,913 — — — 318,913 Loan and bond repayments — (266,770) — — — (266,770) Additions in deferred loan fees — (4,329) — (392) (1,905) (6,626) Amortization and write-off of deferred loan/bond issuance costs/premium (Note 16) — — — 10,717 — 10,717 Retranslation of the NOK 2024 Bonds in USD — — (207) — — (207) June 30, 2021 3,773,221 47,814 (207) 10,325 (1,905) 3,829,248
Schedule of reconciliation of derivatives arising from financing activities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ comprehensive ​ ​ ​ Net derivative ​ Opening balance Cash flows loss Non-cash items liabilities January 1, 2020 ​ (45,931) ​ — ​ — ​ — ​ (45,931) Unrealized loss on derivative financial instruments held for trading (Note 16) ​ — ​ — ​ — ​ (80,472) ​ (80,472) Ineffective portion of cash flow hedges (Note 16) — — — 218 218 Payment for interest rate swaps termination ​ — ​ 10,811 ​ — ​ — ​ 10,811 Proceeds from entering into interest rate swaps ​ — ​ (10,770) ​ — ​ — ​ (10,770) Payment for CCS termination/modification ​ — ​ 4,051 ​ — ​ (4,051) ​ — Effective portion of changes in the fair value of derivatives designated as cash flow hedging instruments — — (11,327) — (11,327) June 30, 2020 (45,931) 4,092 (11,327) (84,305) (137,471) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other ​ ​ ​ ​ ​ ​ Opening ​ comprehensive ​ ​ ​ Net derivative ​ balance loss Non-cash items liabilities January 1, 2021 ​ (107,760) ​ — ​ — ​ (107,760) Unrealized gain on derivative financial instruments held for trading (Note 16) — — 31,457 31,457 Ineffective portion of cash flow hedges (Note 16) ​ — ​ — ​ 114 ​ 114 Effective portion of changes in the fair value of derivatives designated as cash flow hedging instruments — (310) — (310) June 30, 2021 (107,760) (310) 31,571 (76,499)

Organization and Operations - G

Organization and Operations - General information (Details)	Jun. 09, 2021person	Feb. 21, 2021$ / shares	Jun. 30, 2021
Organization and Operations
Number of persons in Board of Directors | person	5
Global Energy & Power Infrastructure Team
Organization and Operations
Price per unit/share (in dollars per unit/share) | $ / shares		$ 5.80
GasLog Partners LP
Organization and Operations
Ownership interest in subsidiary (in percent)			33.30%
General partner interest in GasLog Partners			2.00%
Subsidiaries, except for GasLog Partners and its subsidiaries
Organization and Operations
Ownership interest in subsidiary (in percent)			100.00%

Basis of Presentation - Change

Basis of Presentation - Change in policy in the statement of cash flows (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Change in accounting policy
Net cash provided by operating activities	$ 269,412	$ 208,384	[1]
Net cash used in investing activities	(335,050)	(371,179)
Net cash provided by financing activities	(69,525)	74,085	[1]
Effects of exchange rate changes on cash and cash equivalents	(52)	(2,123)
Decrease in cash and cash equivalents	$ (135,215)	(90,833)
As previously reported
Change in accounting policy
Net cash provided by operating activities		72,848
Net cash used in investing activities		(371,179)
Net cash provided by financing activities		209,621
Effects of exchange rate changes on cash and cash equivalents		(2,123)
Decrease in cash and cash equivalents		(90,833)
Adjustments
Change in accounting policy
Net cash provided by operating activities		135,536
Net cash provided by financing activities		$ (135,536)
[1]	Restated so as to reflect a change in accounting policy introduced on January 1, 2021, with respect to the reclassification of interest paid and movements of cash collaterals for swaps (Note 2)

Basis of Presentation - Going c

Basis of Presentation - Going concern (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Going concern
Current assets	$ 297,591	$ 437,534
Current liabilities	770,995	459,349
Working capital position	(473,404)
Unearned revenue	61,406	$ 59,612
8.875% Senior Notes
Going concern
Current liabilities	$ 315,000
Interest rate on borrowings	8.875%

Investment in Associates (Detai

Investment in Associates (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021USD ($)
Rollforward of investment in associate
Beginning balance	$ 21,759
Share of profit of associates	1,120
Dividend declared	(450)
Ending balance	$ 22,429

Tangible Fixed Assets and Ves_3

Tangible Fixed Assets and Vessels Under Construction (Details) $ in Thousands	Jun. 30, 2021USD ($)m³	Jun. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Property, plant and equipment
Vessels pledged as collateral	$ 5,298,085	$ 5,298,085	$ 5,001,174
Tangible fixed assets
Property, plant and equipment
Balance, at the beginning of the period		5,028,509
Balance, at the end of the period	5,326,990	5,326,990
Vessels
Property, plant and equipment
Balance, at the beginning of the period		5,001,174
Balance, at the end of the period	5,298,085	5,298,085
Office property and other tangible assets
Property, plant and equipment
Balance, at the beginning of the period		27,335
Balance, at the end of the period	28,905	28,905
Vessels under construction
Property, plant and equipment
Balance, at the beginning of the period		132,839
Balance, at the end of the period	$ 78,692	78,692
Hull No. 2312 | Samsung
Property, plant and equipment
Cargo capacity (in cbm) | m³	180,000
Cost | Tangible fixed assets
Property, plant and equipment
Balance, at the beginning of the period		6,111,421
Additions		13,536
Transfer from vessels under construction		375,710
Fully amortized fixed assets		(8,626)
Balance, at the end of the period	$ 6,492,041	6,492,041
Cost | Vessels
Property, plant and equipment
Balance, at the beginning of the period		6,078,041
Additions		11,647
Transfer from vessels under construction		375,710
Fully amortized fixed assets		(8,626)
Balance, at the end of the period	6,456,772	6,456,772
Cost | Office property and other tangible assets
Property, plant and equipment
Balance, at the beginning of the period		33,380
Additions		1,889
Balance, at the end of the period	35,269	35,269
Cost | Vessels under construction
Property, plant and equipment
Balance, at the beginning of the period		132,839
Additions		321,563
Transfer from vessels under construction		(375,710)
Balance, at the end of the period	78,692	78,692
Accumulated depreciation and impairment | Tangible fixed assets
Property, plant and equipment
Balance, at the beginning of the period		(1,082,912)
Depreciation expense		(90,765)
Fully amortized fixed assets		8,626
Balance, at the end of the period	(1,165,051)	(1,165,051)
Accumulated depreciation and impairment | Vessels
Property, plant and equipment
Balance, at the beginning of the period		(1,076,867)
Depreciation expense		(90,446)
Fully amortized fixed assets		8,626
Balance, at the end of the period	(1,158,687)	(1,158,687)
Accumulated depreciation and impairment | Office property and other tangible assets
Property, plant and equipment
Balance, at the beginning of the period		(6,045)
Depreciation expense		(319)
Balance, at the end of the period	$ (6,364)	$ (6,364)

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Leases
Right-of-Use Assets at the beginning of the period			$ 203,437
Additions, net			2,886
Depreciation expense			(5,418)
Right-of-Use Assets at the end of the period	$ 200,905		200,905
Analysis of lease liabilities
Lease liabilities at the beginning of the period			196,170
Additions, net			2,886
Lease charge (Note 16)	2,412	$ 2,526	4,826	$ 5,075
Payments			(10,324)
Lease liabilities at the end of the period	193,558		193,558
Lease liability, current portion	9,950		9,950		$ 9,644
Lease liability, non-current portion	183,608		183,608		$ 186,526
Vessels
Leases
Right-of-Use Assets at the beginning of the period			197,668
Depreciation expense			(4,110)
Right-of-Use Assets at the end of the period	193,558		193,558
Vessels' Equipment
Leases
Right-of-Use Assets at the beginning of the period			1,437
Additions, net			1,014
Depreciation expense			(643)
Right-of-Use Assets at the end of the period	1,808		1,808
Properties
Leases
Right-of-Use Assets at the beginning of the period			4,258
Additions, net			1,914
Depreciation expense			(651)
Right-of-Use Assets at the end of the period	5,521		5,521
Other
Leases
Right-of-Use Assets at the beginning of the period			74
Additions, net			(42)
Depreciation expense			(14)
Right-of-Use Assets at the end of the period	$ 18		$ 18

Other Non-Current Assets (Detai

Other Non-Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Other Non-Current Assets
Various guarantees	$ 288	$ 289
Other long-term assets	5,069	5,378
Cash collaterals on swaps	213	6,796
Total	5,570	12,463
Cash collateral on swaps included in prepayments and other current assets	$ 8,017	$ 16,671

Borrowings (Details)

Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Borrowings
Amounts due within one year	$ 569,009	$ 258,262
Less: unamortized premium	472
Less: unamortized deferred loan/bond issuance costs	(13,706)	(12,636)
Borrowings, current portion	555,775	245,626
Amounts due after one year	3,324,636	3,583,447
Less: unamortized premium		797
Less: unamortized deferred loan/bond issuance costs	(51,163)	(56,649)
Borrowings, non-current portion	3,273,473	3,527,595
Total	$ 3,829,248	$ 3,773,221

Borrowings - Loans (Details)

Borrowings - Loans (Details) $ in Thousands	Jan. 22, 2021USD ($)installmentm³	Jun. 30, 2021USD ($)item	Jun. 30, 2021USD ($)item	Jun. 30, 2020USD ($)
Borrowings
Drawn amount			$ 318,913	$ 401,911
Amount repaid			266,770	$ 150,508
Legal and professional fees related to the Transaction		$ 15,652	15,652
GasLog Houston SLB
Borrowings
Proceeds from sale and finance leaseback	$ 165,958
Leaseback bareboat charter period in years	8 years
Sale leaseback, repurchase period	8 years
Price at which the vessel will be bought back	$ 99,575
Number of quarterly repayments | installment	32
Installment amount	$ 2,074
Final balloon payment	99,575
Unamortized fees written off	$ 3,528
Minimum aggregate market value of mortgaged vessels, as percentage of outstanding facility amount, first two years	100.00%
Minimum aggregate market value of mortgaged vessels, as percentage of outstanding facility amount, after first two years	110.00%
GasLog Houston SLB | GAS-twenty four Ltd ("G24")
Borrowings
Cargo capacity (in cbm) | m³	174,000
Refinancing of outstanding indebtedness	$ 130,889
Newbuilding Facility
Borrowings
Drawn amount			$ 152,955
Number of international banks with debt financing agreement | item		13	13
Loan facilities in existence as of December 31, 2020
Borrowings
Amount repaid			$ 135,880

Borrowings - Bonds (Details)

Borrowings - Bonds (Details) $ in Thousands	Jun. 30, 2021USD ($)$ / kr	Dec. 31, 2020USD ($)$ / kr
Borrowings
Outstanding balance	$ 3,829,248	$ 3,773,221
8.875% Senior Notes
Borrowings
Outstanding balance	$ 314,232	313,773
Interest rate	8.875%
NOK 2024 Bonds
Borrowings
Outstanding balance	$ 103,955	104,017
Fair value of bond	$ 107,352	$ 96,581
Exchange rate | $ / kr	0.1168	0.1170

Related Party Transactions - Re

Related Party Transactions - Receivables and Payables (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Related Party Transactions
Dividends receivable and other amounts due from related parties	$ 884	$ 1,259
Amounts due to related parties	45	164
Other receivables
Related Party Transactions
Dividends receivable and other amounts due from related parties	9	9
Ship management creditors
Related Party Transactions
Amounts due to related parties	146	124
Amounts due to related parties
Related Party Transactions
Amounts due to related parties	45	164
Reimbursement of expenses incurred, payables for office lease and other operating expenses
Related Party Transactions
Amounts due to related parties	45	164
Associates | Dividends receivable
Related Party Transactions
Dividends receivable and other amounts due from related parties	$ 875	$ 1,250

Revenues from Contracts with _3

Revenues from Contracts with Customers (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)item	Jun. 30, 2020USD ($)
Revenues from Contracts with Customers
Revenue	$ 173,010	$ 158,861	$ 378,337	$ 324,758
Number of categories for allocation of revenue | item			2
Long-term fleet
Revenues from Contracts with Customers
Revenue	115,522	117,096	$ 233,681	227,325
Long-term fleet | Minimum
Revenues from Contracts with Customers
Initial duration of contract or charter party agreement			5 years
Spot fleet
Revenues from Contracts with Customers
Revenue	57,293	41,565	$ 144,256	97,041
Spot fleet | Maximum
Revenues from Contracts with Customers
Initial duration of contract or charter party agreement			5 years
Vessel management services
Revenues from Contracts with Customers
Revenue	$ 195	$ 200	$ 400	$ 392

General and Administrative Ex_3

General and Administrative Expenses (Details) - USD ($) $ in Thousands	Jun. 09, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
General and administrative expenses
Employee costs		$ 4,417	$ 6,275	$ 9,199	$ 11,709
Share-based compensation		2,461	1,613	3,099	2,866
Other expenses		6,620	3,266	12,942	6,200
Total		13,498	11,154	25,240	20,775
Transaction costs included in other general and administrative expenses		3,084	0	6,801	0
Accelerated amortization for the stock plan termination		$ 1,949	$ 0	$ 1,949	$ 0
PSUs
General and administrative expenses
Percentage of assumed achievement of performance conditions	100.00%

Vessel Operating and Supervis_3

Vessel Operating and Supervision Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Vessel Operating and Supervision Costs
Crew and vessel management employee costs	$ 24,819	$ 20,548	$ 49,661	$ 40,936
Technical maintenance expenses	9,573	7,583	17,749	17,304
Other vessel operating expenses	6,296	4,474	12,531	9,417
Total	$ 40,688	$ 32,605	$ 79,941	$ 67,657

Other Payables and Accruals (De

Other Payables and Accruals (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Other Payables and Accruals
Unearned revenue	$ 61,406	$ 59,612
Accrued off-hire	10,816	5,886
Accrued purchases	15,924	9,867
Accrued interest	27,029	33,600
Other accruals	32,944	34,092
Total	$ 148,119	$ 143,057

Share Capital and Preference _3

Share Capital and Preference Shares (Details) - Share capital	Jun. 30, 2021$ / sharesshares
Share Capital and Preference Shares
Shares authorized (in shares)	500,000,000
Par value per share (in dollar per share) | $ / shares	$ 0.01
Common shares/units
Share Capital and Preference Shares
Par value per share (in dollar per share) | $ / shares	$ 0.01
Shares issued	95,389,062
Shares outstanding	95,389,062
Preference shares/units
Share Capital and Preference Shares
Shares issued	4,600,000
Shares outstanding	4,600,000

Share Capital and Preference _4

Share Capital and Preference Shares - Dividend Distribution (Details) - USD ($) $ / shares in Units, $ in Thousands	Jun. 30, 2021	May 26, 2021	May 13, 2021	May 05, 2021	Mar. 31, 2021	Mar. 11, 2021	Feb. 21, 2021	Jun. 30, 2021
Share Capital and Preference Shares
Dividend amount paid								$ 14,560
Common shares/units
Share Capital and Preference Shares
Dividend per share (in dollars per share)				$ 0.05			$ 0.05
Dividend amount paid		$ 4,769				$ 4,759
Preference shares/units
Share Capital and Preference Shares
Dividend per share (in dollars per share)			$ 0.546875			$ 0.546875
Dividend amount paid	$ 2,516				$ 2,516

Commitments and Contingencies -

Commitments and Contingencies - Related to vessels under construction (Details) - Vessels under construction - Samsung $ in Thousands	Jun. 30, 2021USD ($)
Contractual commitments
Capital commitment	$ 150,880
Not later than one year
Contractual commitments
Capital commitment	$ 150,880

Commitments and Contingencies_2

Commitments and Contingencies - Revenues from non-cancellable charter agreements (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021USD ($)
Operating lease payments
Number of assumed off-hire days when each vessel will undergo scheduled dry-docking	30 days
Future gross minimum lease revenues receivable in relation to non-cancellable time charter agreements	$ 2,292,614
Not later than one year
Operating lease payments
Future gross minimum lease revenues receivable in relation to non-cancellable time charter agreements	518,333
Later than one year and not later than two years
Operating lease payments
Future gross minimum lease revenues receivable in relation to non-cancellable time charter agreements	390,923
Later than two years and not later than three years
Operating lease payments
Future gross minimum lease revenues receivable in relation to non-cancellable time charter agreements	344,838
Later than three years and not later than four years
Operating lease payments
Future gross minimum lease revenues receivable in relation to non-cancellable time charter agreements	306,158
Later than four years and not later than five years
Operating lease payments
Future gross minimum lease revenues receivable in relation to non-cancellable time charter agreements	280,647
Later than five years
Operating lease payments
Future gross minimum lease revenues receivable in relation to non-cancellable time charter agreements	$ 451,715

Commitments and Contingencies_3

Commitments and Contingencies - Other commitments and guarantees (Details) - GasLog LNG Services Ltd. - item	1 Months Ended		12 Months Ended
	Jun. 30, 2021	Mar. 31, 2019	Dec. 31, 2015
Wartsila
Commitments
Number of existing maintenance agreements related to vessels			7
Number of additional maintenance agreements related to carriers	18
Samsung
Commitments
Number of vessels covered by agreement		19
Period of services to be provided (in years)		6 years
Number of vessels with ballast water management system installed	13

Derivative Financial Instrume_3

Derivative Financial Instruments - Fair value of the derivative assets and liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financial Instruments
Derivative financial instruments, current assets	$ 472	$ 534
Derivative financial instruments, non-current assets	5,101	5,561
Derivative financial assets	5,573	6,095
Derivative financial instruments, current liability	33,393	35,415
Derivative financial instruments, non-current liability	48,679	78,440
Derivative financial liabilities	82,072	113,855
Financial assets designated and effective as hedging instruments carried at fair value | Cross currency swaps
Financial Instruments
Derivative financial assets	5,573	5,768
Financial assets carried at fair value through profit or loss (FVTPL) | Forward foreign exchange contracts
Financial Instruments
Derivative financial assets		327
Financial liabilities carried at fair value through profit or loss (FVTPL) | Interest rate swaps
Financial Instruments
Derivative financial liabilities	81,812	$ 113,855
Financial liabilities carried at fair value through profit or loss (FVTPL) | Forward foreign exchange contracts
Financial Instruments
Derivative financial liabilities	$ 260

Derivative Financial Instrume_4

Derivative Financial Instruments - Interest rate swaps held for trading (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Financial Instruments
Unrealized gain/(loss) on derivative financial instruments held for trading	$ 4,049	$ (9,140)	$ 31,457	$ (80,472)
Interest rate swaps held for trading
Financial Instruments
Unrealized gain/(loss) on derivative financial instruments held for trading	3,718	$ (9,847)	32,044	$ (79,827)
GasLog with counterparty HSBC Bank, plc, termination in July 2025, novated to ABN Amro Bank N.V.
Financial Instruments
Notional amount	$ 33,333		$ 33,333

Derivative Financial Instrume_5

Derivative Financial Instruments - Cross currency swap agreements (Details) - Cross currency swaps qualified as cash flow hedging instruments - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Cross currency swap agreements
Effective portion of changes in fair value of cash flow hedges	$ 1,024	$ 8,985	$ (153)	$ (11,782)
Recycled loss/(gain) of cash flow hedges reclassified to profit or loss	(106)	240	(157)	455
Hedging gain/(loss) recognized in other comprehensive income due to translation of bonds	$ 77	$ (7,344)	$ 207	$ 9,098

Derivative Financial Instrume_6

Derivative Financial Instruments - Forward foreign exchange contracts (Details) € in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)contract	Jun. 30, 2020USD ($)	Jun. 30, 2021EUR (€)contract$ / €
Forward foreign exchange contracts
Unrealized gain/(loss) on derivative financial instruments held for trading | $	$ 4,049	$ (9,140)	$ 31,457	$ (80,472)
Forward foreign exchange contracts held for trading
Forward foreign exchange contracts
Number of contract expired | contract			19
Unrealized gain/(loss) on derivative financial instruments held for trading | $	$ 331	$ 748	$ (587)	$ (604)
Forward foreign exchange contracts held for trading | EUR
Forward foreign exchange contracts
Notional amount | €					€ 28,500
GasLog with counterparty ABN Amro Bank NV, trade In March 2021 and settlement in July-September 2021 | EUR
Forward foreign exchange contracts
Trade date			March 2021
Number of contracts | contract					3
Settlement Date			July-September 2021
Notional amount | €					€ 7,500
GasLog with counterparty ABN Amro Bank NV, trade In March 2021 and settlement in July-September 2021 | EUR | Minimum
Forward foreign exchange contracts
Fixed Exchange Rate					1.1964
GasLog with counterparty ABN Amro Bank NV, trade In March 2021 and settlement in July-September 2021 | EUR | Maximum
Forward foreign exchange contracts
Fixed Exchange Rate					1.1980
GasLog with counterparty OCBC, trade in March 2021 and settlement in October-December 2021 | EUR
Forward foreign exchange contracts
Trade date			March 2021
Number of contracts | contract					3
Settlement Date			October-December 2021
Notional amount | €					€ 7,500
GasLog with counterparty OCBC, trade in March 2021 and settlement in October-December 2021 | EUR | Minimum
Forward foreign exchange contracts
Fixed Exchange Rate					1.1988
GasLog with counterparty OCBC, trade in March 2021 and settlement in October-December 2021 | EUR | Maximum
Forward foreign exchange contracts
Fixed Exchange Rate					1.2000
GasLog with counterparty DNB, trade in June 2021 and settlement in August-December 2021 | EUR
Forward foreign exchange contracts
Trade date			June 2021
Number of contracts | contract					5
Settlement Date			August-December 2021
Notional amount | €					€ 7,500
GasLog with counterparty DNB, trade in June 2021 and settlement in August-December 2021 | EUR | Minimum
Forward foreign exchange contracts
Fixed Exchange Rate					1.1973
GasLog with counterparty DNB, trade in June 2021 and settlement in August-December 2021 | EUR | Maximum
Forward foreign exchange contracts
Fixed Exchange Rate					1.2000
GasLog with counterparty Citibank Europe PLC UK, trade in June 2021 and settlement in October 2021-March 2022 | EUR
Forward foreign exchange contracts
Trade date			June 2021
Number of contracts | contract					6
Settlement Date			October 2021-March 2022
Notional amount | €					€ 6,000
GasLog with counterparty Citibank Europe PLC UK, trade in June 2021 and settlement in October 2021-March 2022 | EUR | Minimum
Forward foreign exchange contracts
Fixed Exchange Rate					1.1913
GasLog with counterparty Citibank Europe PLC UK, trade in June 2021 and settlement in October 2021-March 2022 | EUR | Maximum
Forward foreign exchange contracts
Fixed Exchange Rate					1.1955

Financial Costs and Loss_(gai_3

Financial Costs and Loss/(gain) on Derivatives - Financial Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Financial costs
Amortization and write-off of deferred loan/bond issuance costs/premium	$ 3,603	$ 3,697	$ 10,717	$ 7,514
Interest expense on loans	20,592	25,147	41,364	51,973
Interest expense on bonds and realized loss on CCS	8,608	8,856	17,289	18,340
Lease charge	2,412	2,526	4,826	5,075
Loss arising on bond repurchase at a premium				1,937
Other financial costs, net	16,001	3,331	16,408	159
Total financial costs	51,216	$ 43,557	90,604	$ 84,998
Legal and professional fees related to the Transaction	$ 15,652		$ 15,652

Financial Costs and Loss_(gai_4

Financial Costs and Loss/(gain) on Derivatives - Loss/(gain) on Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Loss/(Gain) on Derivatives
Unrealized loss/(gain) on derivative financial instruments held for trading (Note 15)	$ (4,049)	$ 9,140	$ (31,457)	$ 80,472
Ineffective portion of cash flow hedges	1,518	1,065	(114)	(218)
Total loss/(gain) on derivatives	6,310	13,467	(13,973)	84,591
Interest rate swaps held for trading
Loss/(Gain) on Derivatives
Unrealized loss/(gain) on derivative financial instruments held for trading (Note 15)	(3,718)	9,847	(32,044)	79,827
Realized loss/(gain) on derivative financial instruments held for trading	8,946	2,731	17,653	3,600
Forward foreign exchange contracts held for trading
Loss/(Gain) on Derivatives
Unrealized loss/(gain) on derivative financial instruments held for trading (Note 15)	(331)	(748)	587	604
Realized loss/(gain) on derivative financial instruments held for trading	$ (105)	$ 531	$ (55)	$ 737

Cash Flow Reconciliations - Rec

Cash Flow Reconciliations - Reconciliation of borrowing and derivatives arising from financing activities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Borrowings
Disclosure of reconciliation of liabilities arising from financing activities
Liabilities/(assets) arising from financing activities at beginning of period	$ 3,773,221	$ 3,147,395
Cash flows	47,814	241,861
Other comprehensive income	(207)	(9,098)
Non-cash items	10,325	(5,741)
Deferred financing costs, assets	(1,905)	(1,375)
Liabilities/(assets) arising from financing activities at end of period	3,829,248	3,373,042
Borrowings | Proceeds from loans
Disclosure of reconciliation of liabilities arising from financing activities
Cash flows	318,913	401,911
Total	318,913	401,911
Borrowings | Loans and bond repayments
Disclosure of reconciliation of liabilities arising from financing activities
Cash flows	(266,770)	(150,508)
Non-cash items		(8,063)
Total	(266,770)	(158,571)
Borrowings | Payment for bond repurchase at premium
Disclosure of reconciliation of liabilities arising from financing activities
Cash flows		(1,937)
Total		(1,937)
Borrowings | Additions in deferred loan fees
Disclosure of reconciliation of liabilities arising from financing activities
Cash flows	(4,329)	(7,605)
Non-cash items	(392)	982
Deferred financing costs, assets	(1,905)	(1,375)
Total	(6,626)	(7,998)
Borrowings | Amortization and write-off of deferred loan/bond issuance costs/premium (Note 16)
Disclosure of reconciliation of liabilities arising from financing activities
Non-cash items	10,717	7,514
Total	10,717	7,514
Borrowings | Retranslation of the NOK 2024 Bonds in USD
Disclosure of reconciliation of liabilities arising from financing activities
Other comprehensive income	(207)	(9,098)
Non-cash items		(6,174)
Total	(207)	(15,272)
Derivatives
Disclosure of reconciliation of liabilities arising from financing activities
Liabilities/(assets) arising from financing activities at beginning of period	107,760	45,931
Cash flows		(4,092)
Other comprehensive income	310	11,327
Non-cash items	(31,571)	84,305
Liabilities/(assets) arising from financing activities at end of period	76,499	137,471
Derivatives | Unrealized gain (loss) on derivative financial instruments held for trading (Note 16)
Disclosure of reconciliation of liabilities arising from financing activities
Non-cash items	(31,457)	80,472
Total	(31,457)	80,472
Derivatives | Ineffective portion of cash flow hedges (Note 16)
Disclosure of reconciliation of liabilities arising from financing activities
Non-cash items	(114)	(218)
Total	(114)	(218)
Derivatives | Payment for interest rate swaps termination
Disclosure of reconciliation of liabilities arising from financing activities
Cash flows		(10,811)
Total		(10,811)
Derivatives | Proceeds from entering into interest rate swaps
Disclosure of reconciliation of liabilities arising from financing activities
Cash flows		10,770
Total		10,770
Derivatives | Payment for CCS termination/modification
Disclosure of reconciliation of liabilities arising from financing activities
Cash flows		(4,051)
Non-cash items		4,051
Derivatives | Effective portion of changes in the fair value of derivatives designated as cash flow hedging instruments
Disclosure of reconciliation of liabilities arising from financing activities
Other comprehensive income	310	11,327
Total	$ 310	$ 11,327

Subsequent Events (Details)

Subsequent Events (Details)	Aug. 04, 2021$ / shares
Common shares/units
Subsequent Events
Declaration of quarterly cash dividend (per share)	$ 0.15