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 | |
|---|---|---|---|---|---|---|
|
IBKC
1001
DELISTED
IBERIABANK Corp
IBKC
| $300K | 0.01% |
3,881
+3,869
| +32,242% | +$297K |
|
1002
Casey's General Stores
CASY
$32.4B
| $299K | 0.01% |
2,674
+2,462
| +1,161% | +$282K |
|
1003
Tronox
TROX
$1.02B
| $299K | 0.01% |
14,581
+619
| +4% | +$15.1K |
|
1004
Trade Desk
TTD
$7.89B
| $299K | 0.01% |
65,390
-158,760
| -71% | -$877K |
|
1005
CALL
Take-Two Interactive
TTWO
$42.7B
| $299K | 0.01% |
214
+47
| +28% | +$5.13K |
|
1006
CALL
Autohome
ATHM
$2.45B
| $298K | 0.01% |
149
-14
| -9% | -$845 |
|
1007
CALL
LendingTree
TREE
$550M
| $298K | 0.01% |
37
-27
| -42% | -$7.67K |
|
1008
CALL
Yum! Brands
YUM
$40.6B
| $298K | 0.01% |
668
+49
| +8% | +$3.88K |
|
|
AXON
1009
Axon Enterprise
AXON
$39.6B
| $297K | 0.01% |
11,213
+7,464
| +199% | +$179K |
|
1010
Crown Holdings
CCK
$12.5B
| $297K | 0.01% |
+5,290
| New | +$313K |
|
1011
CALL
HCA Healthcare
HCA
$83.5B
| $297K | 0.01% |
323
+41
| +15% | +$3.29K |
|
1012
CALL
HubSpot
HUBS
$9.73B
| $297K | 0.01% |
202
+190
| +1,583% | +$15.9K |
|
|
NFX
1013
DELISTED
Newfield Exploration
NFX
| $297K | 0.01% |
+9,430
| New | +$286K |
|
|
MVO
1014
MV Oil Trust
MVO
$6.89M
| $296K | 0.01% |
35,323
+28,651
| +429% | +$179K |
|
|
RXDX
1015
CALL
DELISTED
Ignyta, Inc.
RXDX
| $296K | 0.01% |
253
+145
| +134% | +$2.35K |
|
1016
Expeditors International
EXPD
$23B
| $295K | 0.01% |
4,566
-5,087
| -53% | -$312K |
|
1017
CALL
Oracle
ORCL
$346B
| $293K | 0.01% |
2,314
-541
| -19% | -$26.5K |
|
|
VIAB
1018
DELISTED
Viacom Inc. Class B
VIAB
| $293K | 0.01% |
9,522
-10,907
| -53% | -$296K |
|
1019
PUT
APA Corp
APA
$12.9B
| $292K | 0.01% |
748
-1,478
| -66% | -$62.2K |
|
|
CAF
1020
Morgan Stanley China A Share Fund
CAF
$338M
| $292K | 0.01% |
12,530
+7,706
| +160% | +$184K |
|
|
TRTN
1021
DELISTED
Triton International Limited
TRTN
| $292K | 0.01% |
7,810
-1,867
| -19% | -$71.8K |
|
|
FNGN
1022
DELISTED
Financial Engines, Inc.
FNGN
| $292K | 0.01% |
+9,656
| New | +$303K |
|
1023
PUT
Advanced Micro Devices
AMD
$880B
| $289K | 0.01% |
2,816
-6,104
| -68% | -$71.3K |
|
1024
CALL
Danaher
DHR
$135B
| $289K | 0.01% |
549
-312
| -36% | -$25.4K |
|
|
ARRS
1025
DELISTED
ARRIS International plc Ordinary Shares
ARRS
| $289K | 0.01% |
+11,258
| New | +$317K |
|
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.