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 |
Tesla
TSLA
|
+$33.5M |
| 2 |
Netflix
NFLX
|
+$22.8M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$20.9M |
| 4 |
TWX
Time Warner Inc
TWX
|
+$18.3M |
| 5 |
Alibaba
BABA
|
+$15.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$71.1M |
| 2 |
Micron Technology
MU
|
+$43.8M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$26.3M |
| 4 |
Booking.com
BKNG
|
+$22.2M |
| 5 |
Boeing
BA
|
+$21.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 7.87% |
| 2 | Communication Services | 7.14% |
| 3 | Technology | 6.23% |
| 4 | Financials | 5.5% |
| 5 | Healthcare | 5.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
876
PUT
Editas Medicine
EDIT
$399M
| $367K | 0.02% |
566
+237
| +72% | +$8.45K |
|
877
iShares MSCI Europe Financials ETF
EUFN
$3.87B
| $366K | 0.02% |
15,866
+8,079
| +104% | +$196K |
|
878
PUT
Simon Property Group
SPG
$74.5B
| $366K | 0.02% |
1,161
-542
| -32% | -$86.2K |
|
879
CALL
Terex
TEX
$7.98B
| $366K | 0.02% |
9,789
+9,738
| +19,094% | +$422K |
|
880
CALL
Dollar Tree
DLTR
$23.1B
| $364K | 0.02% |
397
+74
| +23% | +$7.76K |
|
881
PUT
Halliburton
HAL
$27.9B
| $364K | 0.02% |
2,554
+548
| +27% | +$27K |
|
|
TSRO
882
PUT
DELISTED
TESARO, Inc.
TSRO
| $364K | 0.02% |
176
+7
| +4% | +$450 |
|
|
EMWP
883
DELISTED
Eros Media World PLC
EMWP
| $362K | 0.02% |
1,663
+1,022
| +159% | +$243K |
|
884
Norfolk Southern
NSC
$78.8B
| $360K | 0.02% |
+2,654
| New | +$382K |
|
885
BGC Group
BGC
$5.58B
| $358K | 0.02% |
+41,400
| New | +$373K |
|
886
CALL
Newmont
NEM
$99.5B
| $357K | 0.02% |
1,909
+1,144
| +150% | +$44.2K |
|
887
PUT
Starbucks
SBUX
$118B
| $357K | 0.02% |
1,719
+32
| +2% | +$1.85K |
|
|
CYOU
888
DELISTED
Changyou.com Limited American Depositary Share
CYOU
| $357K | 0.02% |
+12,801
| New | +$393K |
|
889
Middleby
MIDD
$6.05B
| $356K | 0.02% |
+2,879
| New | +$377K |
|
890
Arch Capital
ACGL
$36.1B
| $355K | 0.02% |
+12,465
| New | +$367K |
|
891
Century Communities
CCS
$2B
| $353K | 0.02% |
11,819
-5,209
| -31% | -$165K |
|
892
Wolfspeed
WOLF
$1.2B
| $353K | 0.02% |
+8,767
| New | +$330K |
|
893
Laureate Education
LAUR
$5.18B
| $352K | 0.02% |
25,632
-677
| -3% | -$9.52K |
|
894
Nike
NKE
$61.9B
| $352K | 0.02% |
+5,304
| New | +$350K |
|
|
CS
895
CALL
DELISTED
Credit Suisse Group
CS
| $352K | 0.02% |
20,264
+19,660
| +3,255% | +$360K |
|
896
PUT
Cisco
CSCO
$450B
| $351K | 0.02% |
2,117
-116
| -5% | -$4.92K |
|
897
iShares MSCI EAFE Min Vol Factor ETF
EFAV
$5.22B
| $351K | 0.02% |
4,769
-1,386
| -23% | -$102K |
|
898
Toyota
TM
$210B
| $350K | 0.02% |
+2,687
| New | +$360K |
|
|
TGP
899
DELISTED
Teekay LNG Partners L.P.
TGP
| $350K | 0.02% |
+19,605
| New | +$380K |
|
900
Element Solutions
ESI
$9.12B
| $348K | 0.02% |
36,167
+13,507
| +60% | +$144K |
|
Similar funds
Simplex Trading's Q1 2018 Portfolio in Review
As of Q1 2018, Simplex Trading held 7,591 positions worth $2.27B, down 2.1% from $2.32B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading withdrew a net $210M in Q1 2018, closing 1,502 positions and reducing 2,267 holdings. Its most notable exit was Alphabet (Google) Class C, an estimated $26.3M position sold in full.
By sector, the portfolio is most concentrated in Consumer Discretionary at 7.9% of assets, down from 11% a quarter earlier, followed by Communication Services and Technology.
Against the trend, Simplex Trading opened a new position in Tesla worth $27.1M.
- Simplex Trading's largest Q1 2018 buy was Tesla: 1,525,035 shares worth $27.1M.
- Simplex Trading added most to Netflix in Q1 2018, an estimated $22.8M increase.
- Simplex Trading's biggest Q1 2018 reduction was Amazon, cutting an estimated $71.1M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2018, selling an estimated $26.3M.
- Simplex Trading's ten largest holdings make up 18% of its $2.27B portfolio in Q1 2018.
- Simplex Trading opened 1,643 new positions and closed 1,502 in Q1 2018.
- Simplex Trading's portfolio value fell 2.1% quarter-over-quarter to $2.27B.
Based on Simplex Trading's 13F filing for Q1 2018, filed 26 Apr 2018.