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 | |
|---|---|---|---|---|---|---|
726
Adeia
ADEA
$2.96B
| $486K | 0.02% |
75,381
+73,778
| +4,602% | +$433K |
|
727
NetEase
NTES
$76.8B
| $485K | 0.02% |
7,030
-469,250
| -99% | -$29.3M |
|
728
Oneok
OKE
$58.5B
| $482K | 0.02% |
+9,020
| New | +$481K |
|
729
PUT
FedEx
FDX
$74.8B
| $480K | 0.02% |
1,780
+444
| +33% | +$102K |
|
730
PUT
Walmart Inc
WMT
$860B
| $480K | 0.02% |
17,784
+2,031
| +13% | +$62.1K |
|
731
PUT
ExxonMobil
XOM
$653B
| $480K | 0.02% |
6,808
+751
| +12% | +$62.1K |
|
|
FNG
732
DELISTED
AdvisorShares New Tech and Media ETF
FNG
| $480K | 0.02% |
22,363
+21,094
| +1,662% | +$468K |
|
|
SHLD
733
PUT
DELISTED
Sears Holding Corporation
SHLD
| $479K | 0.02% |
1,494
-251
| -14% | -$1.24K |
|
|
TIF
734
DELISTED
Tiffany & Co.
TIF
| $476K | 0.02% |
+4,580
| New | +$437K |
|
|
MGI
735
DELISTED
MoneyGram International, Inc. New
MGI
| $475K | 0.02% |
36,056
+22,049
| +157% | +$322K |
|
|
LCI
736
DELISTED
Lannett Company, Inc.
LCI
| $473K | 0.02% |
5,102
+3,762
| +281% | +$367K |
|
737
CALL
LyondellBasell Industries
LYB
$20.1B
| $472K | 0.02% |
622
+169
| +37% | +$17.5K |
|
|
WW
738
CALL
DELISTED
WW International
WW
| $472K | 0.02% |
802
+88
| +12% | +$4K |
|
|
AMAG
739
PUT
DELISTED
AMAG Pharmaceuticals
AMAG
| $472K | 0.02% |
871
+524
| +151% | +$7.9K |
|
740
CALL
Starbucks
SBUX
$117B
| $470K | 0.02% |
1,897
-1,972
| -51% | -$112K |
|
|
LQ
741
DELISTED
La Quinta Holdings Inc.
LQ
| $470K | 0.02% |
25,473
+21,549
| +549% | +$382K |
|
|
SBNY
742
DELISTED
Signature Bank
SBNY
| $469K | 0.02% |
3,418
-4,646
| -58% | -$612K |
|
|
BBBY
743
CALL
Bed Bath & Beyond
BBBY
$460M
| $468K | 0.02% |
886
+412
| +87% | +$14.9K |
|
744
Pembina Pipeline
PBA
$29.7B
| $468K | 0.02% |
12,939
+6,059
| +88% | +$210K |
|
745
CALL
SolarEdge
SEDG
$2.76B
| $468K | 0.02% |
503
+189
| +60% | +$6.51K |
|
|
ITCI
746
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $468K | 0.02% |
32,367
-4,485
| -12% | -$69.2K |
|
747
Wayfair
W
$10.5B
| $467K | 0.02% |
+5,828
| New | +$410K |
|
748
Investcorp Credit Management BDC
ICMB
$10.8M
| $465K | 0.02% |
57,455
-37,318
| -39% | -$322K |
|
749
CALL
TransDigm Group
TDG
$68.2B
| $465K | 0.02% |
95
-55
| -37% | -$14.9K |
|
750
CALL
Arista Networks
ANET
$221B
| $461K | 0.02% |
1,984
-96
| -5% | -$1.28K |
|
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.