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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
126
CALL
Johnson & Johnson
JNJ
$612B
| $36.8M | 0.1% |
2,848
-608
| -18% | -$80.1K |
|
127
CALL
Autodesk
ADSK
$43.3B
| $36.8M | 0.1% |
2,493
+1,611
| +183% | +$251K |
|
128
CALL
Delta Air Lines
DAL
$55B
| $36.1M | 0.1% |
6,271
+1,045
| +20% | +$61.9K |
|
129
PUT
Philip Morris
PM
$302B
| $36M | 0.1% |
4,742
+402
| +9% | +$31.9K |
|
130
PUT
Lockheed Martin
LMT
$119B
| $35.6M | 0.1% |
912
+516
| +130% | +$194K |
|
|
UCD
131
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $35.4M | 0.1% |
10,660
+4,662
| +78% | +$15.5M |
|
132
PUT
Western Digital
WDC
$193B
| $35.2M | 0.1% |
7,812
-606
| -7% | -$25.9K |
|
133
CALL
Baidu
BIDU
$36.7B
| $35.1M | 0.1% |
3,414
+291
| +9% | +$31.3K |
|
134
CALL
Goldman Sachs
GS
$324B
| $34.7M | 0.1% |
1,673
-442
| -21% | -$92.4K |
|
135
CALL
Union Pacific
UNP
$174B
| $34.2M | 0.1% |
2,113
-33
| -2% | -$5.55K |
|
136
CALL
Bristol-Myers Squibb
BMY
$125B
| $34M | 0.1% |
6,703
-398
| -6% | -$18.7K |
|
137
PUT
ServiceNow
NOW
$101B
| $33.9M | 0.1% |
6,680
+2,765
| +71% | +$150K |
|
138
PUT
Starbucks
SBUX
$119B
| $33.6M | 0.1% |
3,802
+502
| +15% | +$46.5K |
|
|
TWTR
139
CALL
DELISTED
Twitter, Inc.
TWTR
| $33.5M | 0.1% |
8,138
-240
| -3% | -$9.81K |
|
140
PUT
Nike
NKE
$61.9B
| $33.5M | 0.1% |
3,567
-865
| -20% | -$74.2K |
|
141
CALL
Blackstone
BX
$152B
| $33.4M | 0.1% |
6,838
+3,531
| +107% | +$172K |
|
142
PUT
Caterpillar
CAT
$412B
| $33.3M | 0.09% |
2,640
+361
| +16% | +$45.9K |
|
143
PUT
AbbVie
ABBV
$453B
| $33.3M | 0.09% |
4,392
-1,985
| -31% | -$136K |
|
144
PUT
Advanced Micro Devices
AMD
$896B
| $33.2M | 0.09% |
11,458
-2,984
| -21% | -$93.6K |
|
|
145
CALL
Biogen
BIIB
$29.8B
| $33.2M | 0.09% |
1,425
+195
| +16% | +$45.4K |
|
146
PUT
Marathon Petroleum
MPC
$94.6B
| $33.1M | 0.09% |
5,450
+3,022
| +124% | +$159K |
|
147
CALL
Cisco
CSCO
$446B
| $33M | 0.09% |
6,682
+380
| +6% | +$19.7K |
|
148
CALL
NXP Semiconductors
NXPI
$69.3B
| $32.9M | 0.09% |
3,013
-240
| -7% | -$24.5K |
|
149
PUT
United Airlines
UAL
$38B
| $32.5M | 0.09% |
3,676
+608
| +20% | +$53.7K |
|
150
NVIDIA
NVDA
$5T
| $32.2M | 0.09% |
7,402,040
-1,529,200
| -17% | -$6.43M |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.