Execution Reports - Fills

Partial fill and filled execution report message formats and fields.

Execution Reports – Fills

Paxos sends fill Execution Reports as orders match against the order book:

• Partial Fill (ExecType (150) = 1) — Sent for each individual fill. lastShares (32) and LastPx (31) contain the fill quantity and price.
• Filled (ExecType (150) = 2) — Sent when the order is completely filled. LeavesQty (151) = 0.

Market buy order executions are captured in Partial Fill messages. The Filled message for market buys is a summary confirming the order is closed — it does not represent an additional execution.

Standard FIX Fields

Tag	Field	When Present	Notes
8	BeginString	Always	Standard FIX header
9	BodyLength	Always	Standard FIX header
35	MsgType	Always	8 (Execution Report)
49	SenderCompID	Always	Standard FIX header
56	TargetCompID	Always	Standard FIX header
34	MsgSeqNum	Always	Standard FIX header
52	SendingTime	Always	Standard FIX header

Standard FIX Trailer

Tag	Field	When Present	Notes
10	CheckSum	Always

Response Fields

Partial Fill

ExecType (150) = 1, OrdStatus (39) = 1 (Partially Filled). LeavesQty (151) > 0.

Always Present

Tag	Field	When Present	Notes
54	Side	Always	1 = Buy, 2 = Sell
150	ExecType	Always	1 (Partially Filled)
32	lastShares	Always	Fill quantity for this execution
109	ClientID	Always
1	Account	Always
31	LastPx	Always	Fill price for this execution
151	LeavesQty	Always	Remaining unfilled quantity
60	TransactTime	Always
58	Text	Always
20	ExecTransType	Always	0 (New)
55	Symbol	Always	Currency pair
17	ExecID	Always
14	CumQty	Always	Total filled quantity so far
11	ClOrdID	Always
44	Price	Always
6	AvgPx	Always	Average fill price
40	OrdType	Always	1 = Market, 2 = Limit, 3 = Stop Market, 4 = Stop Limit
39	OrdStatus	Always	1 (Partially Filled)
37	OrderID	Always
381	GrossTradeAmt	Always	lastShares (32) * LastPx (31)
59	TimeInForce	Always	1 = GTC, 3 = IOC, 4 = FOK, 6 = GTT

Conditional

Tag	Field	When Present	Notes
12	Commission	When charged	Commission paid
13	CommType	When charged	3 (Absolute Value)
38	OrderQty	Limit and market sell orders	Base quantity
152	CashOrderQty	Market buy orders	Fiat notional
18	ExecInst	Post-only orders	6 (Post-Only)
5851	LiquidityInd	When available	1 = Add, 2 = Remove
126	ExpireTime	GTT orders	YYYYMMDD-HH:MM:SS format

Brokerage Clients

Tag	Field	When Present	Notes
5047	AllocBrokerAccountID	Brokerage clients	IdentityAccountId
50	SenderSubID	Brokerage clients	IdentityId
5074	FundCommissionOption	Brokerage clients
5000	RecipientProfileId	Brokerage clients	ProfileID that receives settled currency

Optional

Tag	Field	When Present	Notes
2362	SelfMatchPreventionID	If enabled	Prevents self-matching. Up to 36 characters. Requires additional permissions.

Filled

ExecType (150) = 2, OrdStatus (39) = 2 (Filled). LeavesQty (151) = 0.

Always Present

Tag	Field	When Present	Notes
54	Side	Always	1 = Buy, 2 = Sell
150	ExecType	Always	2 (Filled)
32	lastShares	Always	Fill quantity for this execution
109	ClientID	Always
1	Account	Always
31	LastPx	Always	Fill price for this execution
151	LeavesQty	Always	0
60	TransactTime	Always
58	Text	Always
20	ExecTransType	Always	0 (New)
55	Symbol	Always	Currency pair
17	ExecID	Always
14	CumQty	Always	Total filled quantity
11	ClOrdID	Always
44	Price	Always
6	AvgPx	Always	Average fill price
40	OrdType	Always	1 = Market, 2 = Limit, 3 = Stop Market, 4 = Stop Limit
39	OrdStatus	Always	2 (Filled)
37	OrderID	Always
381	GrossTradeAmt	Always	lastShares (32) * LastPx (31)
59	TimeInForce	Always	1 = GTC, 3 = IOC, 4 = FOK, 6 = GTT

Conditional

Tag	Field	When Present	Notes
12	Commission	When charged	Commission paid
13	CommType	When charged	3 (Absolute Value)
38	OrderQty	Limit and market sell orders	Base quantity
152	CashOrderQty	Market buy orders	Fiat notional
18	ExecInst	Post-only orders	6 (Post-Only)
99	StopPx	Stop orders only	Only when OrdType is 3 or 4
5851	LiquidityInd	When available	1 = Add, 2 = Remove
126	ExpireTime	GTT orders	YYYYMMDD-HH:MM:SS format

Brokerage Clients

Tag	Field	When Present	Notes
5047	AllocBrokerAccountID	Brokerage clients	IdentityAccountId
50	SenderSubID	Brokerage clients	IdentityId
5074	FundCommissionOption	Brokerage clients
5000	RecipientProfileId	Brokerage clients	ProfileID that receives settled currency

Optional

Tag	Field	When Present	Notes
2362	SelfMatchPreventionID	If enabled	Prevents self-matching. Up to 36 characters. Requires additional permissions.

See also: Execution Reports - Cancels and Execution Reports - Rejected and Expired.