FIX Message Samples

FIX 4.2 & 4.4 — real wire captures with decoded field breakdowns

Real FIX protocol messages from a live simulator session — shown in both raw wire format and decoded field-by-field. Use these to understand message structure, validate your parser, or compare against your own implementation. Covers both FIX 4.2 and FIX 4.4.

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FIX Protocol Version 4.4

Raw Decoded

8=FIX.4.4 | 9=148 | 35=D | 34=1080 | 49=TESTBUY1 | 52=20180920-18:14:19.508 | 56=TESTSELL1 | 11=636730640278898634 | 15=USD | 21=2 | 38=7000 | 40=1 | 54=1 | 55=MSFT | 60=20180920-18:14:19.492 | 10=092

Raw Decoded

Tag	Field Name	Value	Description
8	BeginString	FIX.4.4	FIX version
9	BodyLength	289	Message body length in bytes
35	MsgType	8	Execution Report
34	MsgSeqNum	1090	Sequence number
49	SenderCompID	TESTSELL1	Sender (sell-side / broker)
52	SendingTime	20180920-18:23:53.671	UTC timestamp
56	TargetCompID	TESTBUY1	Recipient (buy-side / OMS)
6	AvgPx	113.35	Average fill price
11	ClOrdID	636730640278898634	Original client order ID (echoed back)
14	CumQty	3500	Total quantity filled so far
15	Currency	USD	Order currency
17	ExecID	20636730646335310000	Unique execution identifier
31	LastPx	113.35	Price of this fill
32	LastQty	3500	Quantity of this fill
37	OrderID	20636730646335310000	Broker-assigned order ID
38	OrderQty	7000	Original order quantity
39	OrdStatus	1	Partially filled
54	Side	1	Buy
55	Symbol	MSFT	Instrument symbol
150	ExecType	F	Trade (partial or full fill)
151	LeavesQty	3500	Remaining open quantity
453	NoPartyIDs	1	Number of party entries
448	PartyID	BRK2	Broker identifier
447	PartyIDSource	D	Proprietary / custom identifier
452	PartyRole	1	Executing firm
10	CheckSum	151	3-digit message checksum

8=FIX.4.4 | 9=289 | 35=8 | 34=1090 | 49=TESTSELL1 | 52=20180920-18:23:53.671 | 56=TESTBUY1 | 6=113.35 | 11=636730640278898634 | 14=3500 | 15=USD | 17=20636730646335310000 | 31=113.35 | 32=3500 | 37=20636730646335310000 | 38=7000 | 39=1 | 54=1 | 55=MSFT | 150=F | 151=3500 | 10=151

Raw Decoded

8=FIX.4.4 | 9=168 | 35=F | 34=941 | 49=TESTBUY5 | 52=20260324-15:48:09.239 | 56=FIXSIM | 41=7639099640711117266 | 11=5639099640892351941 | 55=INTC | 54=2 | 38=1000 | 60=20260324-15:48:09.235 | 10=244

Raw Decoded

Tag	Field Name	Value	Description
HEADER
8	BeginString	FIX.4.4	FIX version
9	BodyLength	167	Message body length in bytes
35	MsgType	G	Order Cancel/Replace Request (amend)
34	MsgSeqNum	993	Sequence number
49	SenderCompID	TESTBUY5	Buy-side OMS sending the amend
52	SendingTime	20260324-16:37:40.694	UTC timestamp
56	TargetCompID	FIXSIM	Broker / counterparty receiving amend
AMEND DETAILS
41	OrigClOrdID	1263909966920544578	ClOrdID of the order being amended
11	ClOrdID	8639099670606720316	New unique ID for this amend request
55	Symbol	MSFT	Instrument being amended
54	Side	1	Buy
38	OrderQty	1200	New requested quantity (replaces original)
40	OrdType	1	Market order
21	HandlInst	1	Automated execution, no broker intervention
59	TimeInForce	0	Day order
60	TransactTime	20260324-16:37:40.672	Time amend was submitted
TRAILER
10	CheckSum	169	3-digit message checksum

8=FIX.4.4 | 9=167 | 35=G | 34=993 | 49=TESTBUY5 | 52=20260324-16:37:40.694 | 56=FIXSIM | 41=1263909966920544578 | 11=8639099670606720316 | 55=MSFT | 54=1 | 38=1200 | 40=1 | 21=1 | 59=0 | 60=20260324-16:37:40.672 | 10=169

Raw Decoded

Tag	Field Name	Value	Description
HEADER
8	BeginString	FIX.4.4	FIX version
9	BodyLength	427	Message body length in bytes
35	MsgType	J	Allocation Instruction
34	MsgSeqNum	261	Sequence number
49	SenderCompID	MYOMS	OMS sending the allocation
52	SendingTime	20251019-19:38:07.929	UTC timestamp
56	TargetCompID	BLOOM	Recipient (e.g. Bloomberg AIM)
INSTRUMENT
55	Symbol	T 1 1/8 06/15/18	US Treasury Note descriptor
48	SecurityID	912828XF2	CUSIP identifier
22	SecurityIDSource	1	CUSIP number
ALLOCATION DETAILS
70	AllocID	0000620251019	Unique allocation identifier
71	AllocTransType	0	New allocation
626	AllocType	1	Calculated (post-trade)
54	Side	1	Buy
53	Shares	300,000	Total face value allocated
6	AvgPx	100.6171875	Average fill price (% of par)
15	Currency	USD	Trade currency
120	SettlCurrency	USD	Settlement currency
60	TransactTime	20251019-19:38:01	Time of transaction
75	TradeDate	20251019	Trade date
64	FutSettDate	20251020	Settlement date (T+1)
12	Commission	0	Commission amount
13	CommType	1	Per unit
ORDERS (NoOrders=1)
73	NoOrders	1	Number of orders in this allocation
11	ClOrdID	0000120151019	Original client order ID
ALLOC ACCOUNTS (NoAllocs=1)
78	NoAllocs	1	Number of sub-allocations
79	AllocAccount	USFIX3	Account receiving allocation
80	AllocShares	300,000	Shares/face value for this account
467	IndividualAllocID	4	ID for this individual allocation
153	AllocPrice	100.6171875	Allocated price for this account
154	AllocNetMoney	303,022.671	Net money for this account
81	ProcessCode	0	Regular trade
EXECUTIONS (NoExecs=1)
124	NoExecs	1	Number of execution entries
17	ExecID	242:6432:342	Execution identifier
32	LastQty	300,000	Quantity of this execution
31	LastPx	100.6171875	Price of this execution
423	PriceType	1	Percentage (bond price as % of par)
PARTIES (NoPartyIDs=1)
453	NoPartyIDs	1	Number of party entries
448	PartyID	9001	Executing broker identifier
447	PartyIDSource	C	Generally accepted market participant identifier
452	PartyRole	1	Executing firm
TRAILER
10	CheckSum	237	3-digit message checksum

8=FIX.4.4 | 9=427 | 35=J | 34=261 | 49=MYOMS | 52=20251019-19:38:07.929 | 56=BLOOM | 55=T 1 1/8 06/15/18 | 48=912828XF2 | 22=1 | 70=0000620251019 | 71=0 | 626=1 | 54=1 | 53=300000 | 6=100.6171875 | 15=USD | 120=USD | 60=20251019-19:38:01 | 75=20251019 | 64=20251020 | 73=1 | 11=0000120151019 | 78=1 | 79=USFIX3 | 80=300000 | 153=100.6171875 | 154=303022.671 | 124=1 | 17=242:6432:342 | 32=300000 | 31=100.6171875 | 423=1 | 453=1 | 448=9001 | 447=C | 452=1 | 10=237

Raw Decoded

8=FIX.4.4 | 9=127 | 35=P | 34=698 | 49=TESTSELL1 | 52=20260324-15:44:11.705 | 56=TESTBUY1 | 60=20260324-15:44:11.705 | 70=2639096067028819307 | 75=20251019 | 87=0 | 10=021

Raw Decoded

8=FIX.4.4 | 9=75 | 35=A | 34=1092 | 49=TESTBUY1 | 52=20180920-18:24:59.643 | 56=TESTSELL1 | 98=0 | 108=60 | 10=178

Raw Decoded

8=FIX.4.4 | 9=63 | 35=5 | 34=1091 | 49=TESTBUY1 | 52=20180920-18:24:58.675 | 56=TESTSELL1 | 10=138

FIX Protocol Version 4.2

Raw Decoded

8=FIX.4.2 | 9=163 | 35=D | 34=972 | 49=TESTBUY3 | 52=20190206-16:25:10.403 | 56=TESTSELL3 | 11=141636850670842269979 | 21=2 | 38=100 | 40=1 | 54=1 | 55=AAPL | 60=20190206-16:25:08.968 | 207=TO | 6000=TEST1234 | 10=106

Raw Decoded

Tag	Field Name	Value	Description
8	BeginString	FIX.4.2	FIX version
9	BodyLength	271	Message body length in bytes
35	MsgType	8	Execution Report
34	MsgSeqNum	974	Sequence number
49	SenderCompID	TESTSELL3	Sender (sell-side / broker)
52	SendingTime	20190206-16:26:09.059	UTC timestamp
56	TargetCompID	TESTBUY3	Recipient (buy-side / OMS)
6	AvgPx	174.51	Average fill price
11	ClOrdID	141636850670842269979	Original client order ID (echoed back)
14	CumQty	100	Total quantity filled
17	ExecID	36368506716843579792	Unique execution identifier
20	ExecTransType	0	New execution (FIX 4.2 only)
31	LastPx	174.51	Price of this fill
32	LastQty	100	Quantity of this fill
37	OrderID	10054483	Broker-assigned order ID
38	OrderQty	100	Original order quantity
39	OrdStatus	2	Fully filled
54	Side	1	Buy
55	Symbol	AAPL	Instrument symbol
150	ExecType	2	Fill
151	LeavesQty	0	Remaining open quantity (zero = fully filled)
10	CheckSum	194	3-digit message checksum

8=FIX.4.2 | 9=271 | 35=8 | 34=974 | 49=TESTSELL3 | 52=20190206-16:26:09.059 | 56=TESTBUY3 | 6=174.51 | 11=141636850670842269979 | 14=100 | 17=36368506716843579792 | 20=0 | 31=174.51 | 32=100 | 37=10054483 | 38=100 | 39=2 | 54=1 | 55=AAPL | 150=2 | 151=0 | 10=194

Raw Decoded

8=FIX.4.2 | 9=154 | 35=F | 34=944 | 49=TESTBUY4 | 52=20260324-15:48:58.329 | 56=TESTSELL4 | 41=9639099641173096676 | 11=6639099641381204755 | 55=MSFT | 54=1 | 38=1500 | 60=20260324-15:48:58.120 | 10=195

Raw Decoded

Tag	Field Name	Value	Description
HEADER
8	BeginString	FIX.4.2	FIX version
9	BodyLength	170	Message body length in bytes
35	MsgType	G	Order Cancel/Replace Request (amend)
34	MsgSeqNum	993	Sequence number
49	SenderCompID	TESTBUY4	Buy-side OMS sending the amend
52	SendingTime	20260324-16:37:26.192	UTC timestamp
56	TargetCompID	TESTSELL4	Broker / counterparty receiving amend
AMEND DETAILS
41	OrigClOrdID	1363909966930199451	ClOrdID of the order being amended
11	ClOrdID	7639099670461883708	New unique ID for this amend request
55	Symbol	MSFT	Instrument being amended
54	Side	1	Buy
38	OrderQty	1200	New requested quantity (replaces original)
40	OrdType	1	Market order
21	HandlInst	2	Automated execution, no broker intervention
59	TimeInForce	0	Day order
60	TransactTime	20260324-16:37:26.188	Time amend was submitted
TRAILER
10	CheckSum	125	3-digit message checksum

8=FIX.4.2 | 9=170 | 35=G | 34=993 | 49=TESTBUY4 | 52=20260324-16:37:26.192 | 56=TESTSELL4 | 41=1363909966930199451 | 11=7639099670461883708 | 55=MSFT | 54=1 | 38=1200 | 40=1 | 21=2 | 59=0 | 60=20260324-16:37:26.188 | 10=125

Raw Decoded

Tag	Field Name	Value	Description
HEADER
8	BeginString	FIX.4.2	FIX version
9	BodyLength	706	Message body length in bytes
35	MsgType	J	Allocation Instruction
34	MsgSeqNum	525	Sequence number
49	SenderCompID	MYOMS	OMS sending the allocation
52	SendingTime	20230625-17:09:44	UTC timestamp
56	TargetCompID	BROKER	Recipient (executing broker)
INSTRUMENT
55	Symbol	[N/A]	Symbol not applicable — identified by ISIN
48	SecurityID	US85227SAJ503	ISIN identifier
22	IDSource	4	ISIN number
ALLOCATION DETAILS
70	AllocID	3739:20230625:65667:5:0	Unique allocation identifier
71	AllocTransType	0	New allocation
54	Side	1	Buy
53	Shares	200,000	Total face value allocated
6	AvgPx	92.951	Average fill price (% of par)
159	AccruedInterestAmt	52,430.56	Accrued interest on bond position
118	NetMoney	1,911,430.567	Total net settlement amount
15	Currency	USD	Trade currency
60	TransactTime	20230625-17:09:44	Time of transaction
75	TradeDate	20230625	Trade date
64	FutSettDate	20230628	Settlement date (T+3 — corp bond standard)
ORDERS (NoOrders=1)
73	NoOrders	1	Number of orders in this allocation
11	ClOrdID	23847620SD	Original client order ID
37	OrderID	ORDER:23434625:65667:5	Broker-assigned order ID
38	OrderQty	200,000	Original order quantity
ALLOC ACCOUNTS (NoAllocs=2) — split allocation
78	NoAllocs	2	Two accounts receiving this allocation
79	AllocAccount	US1	Account 1
80	AllocShares	1,370,000	Face value for account 1
153	AllocPrice	92.95	Allocated price for account 1
154	AllocNetMoney	1,309,329.93	Net money for account 1
79	AllocAccount	US2	Account 2
80	AllocShares	630,000	Face value for account 2
153	AllocPrice	92.95	Allocated price for account 2
154	AllocNetMoney	602,100.63	Net money for account 2
EXECUTIONS (NoExecs=1)
124	NoExecs	1	Number of execution entries
32	LastQty	200,000	Quantity of this execution
31	LastPx	92.95	Price of this execution
TRAILER
10	CheckSum	195	3-digit message checksum

8=FIX.4.2 | 9=706 | 35=J | 34=525 | 49=MYOMS | 52=20230625-17:09:44 | 56=BROKER | 55=[N/A] | 48=US85227SAJ503 | 22=4 | 70=3739:20230625:65667:5:0 | 71=0 | 54=1 | 53=200000 | 6=92.951 | 159=52430.56 | 118=1911430.567 | 15=USD | 75=20230625 | 64=20230628 | 73=1 | 11=23847620SD | 37=ORDER:23434625:65667:5 | 38=200000 | 78=2 | 79=US1 | 80=1370000 | 153=92.95 | 154=1309329.93 | 79=US2 | 80=630000 | 153=92.95 | 154=602100.63 | 124=1 | 32=200000 | 31=92.95 | 10=195

Raw Decoded

8=FIX.4.2 | 9=127 | 35=P | 34=936 | 49=TESTSELL3 | 52=20260324-15:45:13.992 | 56=TESTBUY3 | 60=20260324-15:45:13.992 | 70=3639096067028819307 | 75=20230625 | 87=0 | 10=041

Raw Decoded

8=FIX.4.2 | 9=74 | 35=A | 34=978 | 49=TESTSELL3 | 52=20190206-16:29:19.208 | 56=TESTBUY3 | 98=0 | 108=60 | 10=137

Raw Decoded

8=FIX.4.2 | 9=62 | 35=5 | 34=977 | 49=TESTSELL3 | 52=20190206-16:28:51.518 | 56=TESTBUY3 | 10=092

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FIX Message Samples

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New Order Single D

Execution Report 8

Order Cancel Request F

Order Cancel/Replace Request G

Allocation Instruction J

Allocation Instruction Ack P

Logon A

Logout 5

New Order Single D

Execution Report 8

Order Cancel Request F

Order Cancel/Replace Request G

Allocation Instruction J

Allocation Instruction Ack P

Logon A

Logout 5

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