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 | |
|---|---|---|---|---|---|---|
101
CALL
Lam Research
LRCX
$403B
| $39.6M | 0.12% |
29,070
+19,980
| +220% | +$286K |
|
102
PUT
Chevron
CVX
$381B
| $39.5M | 0.12% |
3,628
+1,180
| +48% | +$137K |
|
103
PUT
Verizon
VZ
$183B
| $38.9M | 0.11% |
6,927
+4,871
| +237% | +$276K |
|
104
CALL
NXP Semiconductors
NXPI
$69B
| $38.5M | 0.11% |
5,247
+1,663
| +46% | +$132K |
|
|
TWTR
105
CALL
DELISTED
Twitter, Inc.
TWTR
| $38.4M | 0.11% |
13,371
+2,599
| +24% | +$81.5K |
|
106
CALL
Procter & Gamble
PG
$345B
| $38.3M | 0.11% |
4,162
+839
| +25% | +$75K |
|
107
PUT
3M
MMM
$89.1B
| $38M | 0.11% |
2,382
-1,267
| -35% | -$210K |
|
108
PUT
Walmart Inc
WMT
$878B
| $37.7M | 0.11% |
12,135
+90
| +0.7% | +$2.88K |
|
109
CALL
Wynn Resorts
WYNN
$9.82B
| $37.6M | 0.11% |
3,797
-252
| -6% | -$27.2K |
|
110
PUT
AutoZone
AZO
$48.9B
| $37.3M | 0.11% |
445
-184
| -29% | -$147K |
|
111
CALL
Intuitive Surgical
ISRG
$124B
| $37.2M | 0.11% |
2,331
+612
| +36% | +$104K |
|
|
RHT
112
PUT
DELISTED
Red Hat Inc
RHT
| $36.9M | 0.11% |
2,099
-427
| -17% | -$67.7K |
|
113
CALL
Nike
NKE
$63.7B
| $36.8M | 0.11% |
4,964
+73
| +1% | +$5.46K |
|
114
CALL
Starbucks
SBUX
$119B
| $36.6M | 0.11% |
5,685
+3,869
| +213% | +$242K |
|
115
PUT
PayPal
PYPL
$49.3B
| $36.6M | 0.11% |
4,350
+923
| +27% | +$76.9K |
|
116
CALL
PepsiCo
PEP
$184B
| $36.1M | 0.11% |
3,268
+202
| +7% | +$22.8K |
|
117
PUT
Merck
MRK
$312B
| $35.8M | 0.11% |
4,908
+3,945
| +410% | +$278K |
|
|
118
CALL
Chevron
CVX
$381B
| $35.5M | 0.1% |
3,261
+866
| +36% | +$100K |
|
119
CALL
Baidu
BIDU
$36.8B
| $35.2M | 0.1% |
2,221
+1,040
| +88% | +$194K |
|
120
PUT
Blackrock
BLK
$161B
| $34.8M | 0.1% |
887
+161
| +22% | +$65.9K |
|
121
CALL
Qualcomm
QCOM
$183B
| $34.5M | 0.1% |
6,068
-324
| -5% | -$19.7K |
|
|
RHT
122
CALL
DELISTED
Red Hat Inc
RHT
| $34.1M | 0.1% |
1,942
+1,300
| +202% | +$206K |
|
123
PUT
AT&T
T
$155B
| $33.7M | 0.1% |
15,639
+11,200
| +252% | +$261K |
|
|
124
PUT
Wynn Resorts
WYNN
$9.82B
| $33.3M | 0.1% |
3,371
+176
| +6% | +$19K |
|
125
CALL
American Airlines Group
AAL
$10.1B
| $32.9M | 0.1% |
10,249
+4,967
| +94% | +$173K |
|
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.