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 |
CELG
Celgene Corp
CELG
|
+$31.6M |
| 2 |
Citigroup
C
|
+$19.5M |
| 3 |
AGN
Allergan plc
AGN
|
+$18.4M |
| 4 |
Baidu
BIDU
|
+$18M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$14.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$81.3M |
| 2 |
NVIDIA
NVDA
|
+$60.2M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$48.2M |
| 4 |
Apple
AAPL
|
+$48.2M |
| 5 |
Meta Platforms (Facebook)
META
|
+$31.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 11.27% |
| 2 | Technology | 10.64% |
| 3 | Healthcare | 7.06% |
| 4 | Communication Services | 6.92% |
| 5 | Industrials | 5.66% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1751
PUT
IPG Photonics
IPGP
$3.89B
| $106K | ﹤0.01% |
222
-59
| -21% | -$12.5K |
|
1752
Liberty Latin America Class A
LILA
$1.51B
| $106K | ﹤0.01% |
8,262
-8,861
| -52% | -$125K |
|
|
LNW
1753
CALL
DELISTED
Light & Wonder
LNW
| $106K | ﹤0.01% |
194
+186
| +2,325% | +$9.06K |
|
1754
PUT
iShares MSCI Global Gold Miners ETF
RING
$2.31B
| $106K | ﹤0.01% |
1,152
-623
| -35% | -$11.4K |
|
1755
CALL
TripAdvisor
TRIP
$1.59B
| $106K | ﹤0.01% |
1,047
+107
| +11% | +$3.87K |
|
1756
PUT
Exelixis
EXEL
$13.9B
| $105K | ﹤0.01% |
895
-188
| -17% | -$5K |
|
1757
CALL
Gen Digital
GEN
$15.6B
| $105K | ﹤0.01% |
1,419
-264
| -16% | -$7.89K |
|
1758
PUT
HCA Healthcare
HCA
$84.8B
| $105K | ﹤0.01% |
594
-134
| -18% | -$10.8K |
|
1759
PUT
Investcorp Credit Management BDC
ICMB
$11.3M
| $105K | ﹤0.01% |
581
-583
| -50% | -$5.03K |
|
|
K
1760
PUT
DELISTED
Kellanova
K
| $105K | ﹤0.01% |
1,141
-967
| -46% | -$58.2K |
|
1761
PUT
Lowe's Companies
LOW
$116B
| $105K | ﹤0.01% |
2,076
-354
| -15% | -$29.3K |
|
1762
CALL
Synopsys
SNPS
$71.5B
| $105K | ﹤0.01% |
462
+211
| +84% | +$18.3K |
|
1763
Etsy
ETSY
$7.65B
| $104K | ﹤0.01% |
5,102
-4,346
| -46% | -$76.7K |
|
1764
Gerdau
GGB
$9.44B
| $104K | ﹤0.01% |
35,489
+31,298
| +747% | +$85.2K |
|
1765
PUT
Mercado Libre
MELI
$91.3B
| $104K | ﹤0.01% |
148
-115
| -44% | -$31.1K |
|
1766
PUT
iShares Silver Trust
SLV
$28.1B
| $104K | ﹤0.01% |
752
+112
| +18% | +$1.77K |
|
|
HTZ
1767
PUT
DELISTED
Hertz Global Holdings, Inc.
HTZ
| $104K | ﹤0.01% |
1,430
+232
| +19% | +$4.49K |
|
|
DFRG
1768
DELISTED
Del Frisco's Restaurant Group, Inc. Common Stock
DFRG
| $104K | ﹤0.01% |
+6,825
| New | +$97K |
|
|
LLL
1769
CALL
DELISTED
L3 Technologies, Inc.
LLL
| $104K | ﹤0.01% |
122
-23
| -16% | -$4.38K |
|
|
RSPP
1770
CALL
DELISTED
RSP Permian, Inc.
RSPP
| $104K | ﹤0.01% |
321
+120
| +60% | +$4.31K |
|
1771
CALL
Bunge Global
BG
$23.6B
| $103K | ﹤0.01% |
902
+716
| +385% | +$48.7K |
|
1772
China Yuchai International
CYD
$1.69B
| $103K | ﹤0.01% |
+4,304
| New | +$103K |
|
|
CYBR
1773
PUT
DELISTED
CyberArk
CYBR
| $103K | ﹤0.01% |
318
+6
| +2% | +$263 |
|
1774
iShares MSCI Australia ETF
EWA
$1.34B
| $103K | ﹤0.01% |
+4,461
| New | +$102K |
|
1775
iShares Gold Trust
IAU
$63B
| $103K | ﹤0.01% |
+4,132
| New | +$101K |
|
Similar funds
Simplex Trading's Q4 2017 Portfolio in Review
As of Q4 2017, Simplex Trading held 7,407 positions worth $2.32B, down 5.1% from $2.45B the previous quarter. Its ten largest holdings account for 17% of the portfolio.
Simplex Trading withdrew a net $315M in Q4 2017, closing 1,460 positions and reducing 2,239 holdings. Its most notable exit was iShares 20+ Year Treasury Bond ETF, an estimated $21.1M position sold in full.
By sector, the portfolio is most concentrated in Consumer Discretionary at 11% of assets, down from 14% a quarter earlier, followed by Technology and Healthcare.
Against the trend, Simplex Trading opened a new position in Celgene Corp worth $29.2M.
- Simplex Trading's largest Q4 2017 buy was Celgene Corp: 280,194 shares worth $29.2M.
- Simplex Trading added most to Baidu in Q4 2017, an estimated $18M increase.
- Simplex Trading's biggest Q4 2017 reduction was Amazon, cutting an estimated $81.3M.
- Simplex Trading fully exited iShares 20+ Year Treasury Bond ETF in Q4 2017, selling an estimated $21.1M.
- Simplex Trading's ten largest holdings make up 17% of its $2.32B portfolio in Q4 2017.
- Simplex Trading opened 1,548 new positions and closed 1,460 in Q4 2017.
- Simplex Trading's portfolio value fell 5.1% quarter-over-quarter to $2.32B.
Based on Simplex Trading's 13F filing for Q4 2017, filed 10 Jan 2018.