Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Russell 2000 ETF
IWM
|
+$58.5M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$56.5M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$44.1M |
| 4 |
Apple
AAPL
|
+$20.3M |
| 5 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$12.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$109M |
| 2 |
Meta Platforms (Facebook)
META
|
+$62.3M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$36.2M |
| 4 |
Goldman Sachs
GS
|
+$27.1M |
| 5 |
Boeing
BA
|
+$24.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.49% |
| 2 | Consumer Discretionary | 0.48% |
| 3 | Technology | 0.4% |
| 4 | Financials | 0.25% |
| 5 | Industrials | 0.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2776
CALL
Buckle
BKE
$2.21B
| $284K | ﹤0.01% |
147
+138
| +1,533% | +$2.8K |
|
2777
PUT
PagSeguro Digital
PAGS
$2.62B
| $284K | ﹤0.01% |
152
-105
| -41% | -$2.58K |
|
2778
PUT
Sun Communities
SUI
$14.9B
| $284K | ﹤0.01% |
28
+11
| +65% | +$1.12K |
|
|
APHA
2779
CALL
DELISTED
Aphria Inc. Common Shares
APHA
| $284K | ﹤0.01% |
+500
| New | +$3.94K |
|
2780
PUT
Franklin Electric
FELE
$4.72B
| $283K | ﹤0.01% |
66
-8
| -11% | -$347 |
|
2781
Thermo Fisher Scientific
TMO
$210B
| $283K | ﹤0.01% |
+1,269
| New | +$298K |
|
2782
TSMC
TSM
$2.09T
| $283K | ﹤0.01% |
+7,694
| New | +$293K |
|
2783
British American Tobacco
BTI
$131B
| $282K | ﹤0.01% |
+8,865
| New | +$345K |
|
2784
PUT
Century Aluminum
CENX
$4.52B
| $282K | ﹤0.01% |
386
+261
| +209% | +$2.37K |
|
2785
Conduent
CNDT
$237M
| $282K | ﹤0.01% |
+26,533
| New | +$413K |
|
2786
CALL
Lear
LEA
$7.24B
| $282K | ﹤0.01% |
23
-80
| -78% | -$10.7K |
|
|
LX
2787
CALL
LexinFintech Holdings
LX
$246M
| $282K | ﹤0.01% |
389
+358
| +1,155% | +$3.31K |
|
|
NUVA
2788
CALL
DELISTED
NuVasive, Inc.
NUVA
| $282K | ﹤0.01% |
57
+41
| +256% | +$2.47K |
|
2789
Coty
COTY
$2.35B
| $281K | ﹤0.01% |
42,976
+39,553
| +1,156% | +$365K |
|
2790
CALL
LivePerson
LPSN
$20.1M
| $281K | ﹤0.01% |
10
+2
| +25% | +$617 |
|
2791
CALL
Sabre
SABR
$712M
| $281K | ﹤0.01% |
130
+61
| +88% | +$1.48K |
|
|
QVCGA
2792
DELISTED
QVC Group Inc Series A
QVCGA
| $281K | ﹤0.01% |
+297
| New | +$312K |
|
|
QIWI
2793
DELISTED
QIWI PLC
QIWI
| $281K | ﹤0.01% |
19,917
-13,206
| -40% | -$178K |
|
|
XXII
2794
CALL
22nd Century Group
XXII
$1.47M
| – | – |
0
| – | – |
|
|
PRFT
2795
DELISTED
Perficient Inc
PRFT
| $280K | ﹤0.01% |
+12,583
| New | +$309K |
|
2796
CALL
CRH
CRH
$68.2B
| $279K | ﹤0.01% |
106
+36
| +51% | +$1.02K |
|
2797
PUT
Jack in the Box
JACK
$302M
| $279K | ﹤0.01% |
36
-60
| -63% | -$4.88K |
|
2798
PUT
JB Hunt Transport Services
JBHT
$26.9B
| $279K | ﹤0.01% |
30
-46
| -61% | -$4.88K |
|
2799
La-Z-Boy
LZB
$1.61B
| $279K | ﹤0.01% |
+10,099
| New | +$285K |
|
2800
PUT
Ameris Bancorp
ABCB
$5.86B
| $278K | ﹤0.01% |
88
+81
| +1,157% | +$3.3K |
|
Similar funds
Simplex Trading's Q4 2018 Portfolio in Review
As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,573 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.
By sector, the portfolio is most concentrated in Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
- Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
- Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
- Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
- Simplex Trading opened 1,199 new positions and closed 1,573 in Q4 2018.
- Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.
Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.