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 | |
|---|---|---|---|---|---|---|
951
Jones Lang LaSalle
JLL
$14.8B
| $322K | 0.01% |
+2,166
| New | +$306K |
|
952
Novanta
NOVT
$5.1B
| $321K | 0.01% |
6,439
-3,304
| -34% | -$161K |
|
953
PUT
Nutanix
NTNX
$14.2B
| $320K | 0.01% |
1,482
-274
| -16% | -$8.3K |
|
|
LGF.B
954
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $320K | 0.01% |
10,110
+5,180
| +105% | +$155K |
|
|
APC
955
PUT
DELISTED
Anadarko Petroleum
APC
| $320K | 0.01% |
1,233
-1,004
| -45% | -$49.4K |
|
956
Invitation Homes
INVH
$17.5B
| $319K | 0.01% |
+13,553
| New | +$314K |
|
957
PUT
Align Technology
ALGN
$12B
| $318K | 0.01% |
676
+312
| +86% | +$70.9K |
|
958
FirstEnergy
FE
$28.6B
| $318K | 0.01% |
+10,409
| New | +$338K |
|
959
CALL
Thermo Fisher Scientific
TMO
$213B
| $318K | 0.01% |
159
-375
| -70% | -$71.8K |
|
|
GG
960
DELISTED
Goldcorp Inc
GG
| $318K | 0.01% |
24,908
-98,324
| -80% | -$1.27M |
|
961
Becton Dickinson
BDX
$42.1B
| $316K | 0.01% |
980
+66
| +7% | +$13.8K |
|
|
MDSO
962
DELISTED
Medidata Solutions, Inc.
MDSO
| $316K | 0.01% |
+4,997
| New | +$356K |
|
|
WBA
963
PUT
DELISTED
Walgreens Boots Alliance
WBA
| $315K | 0.01% |
2,580
+925
| +56% | +$65.2K |
|
964
Franklin Covey
FC
$236M
| $314K | 0.01% |
15,150
-19,173
| -56% | -$376K |
|
965
National Grid
NGG
$82B
| $313K | 0.01% |
+6,027
| New | +$321K |
|
|
CLVS
966
PUT
DELISTED
Clovis Oncology, Inc.
CLVS
| $313K | 0.01% |
392
-525
| -57% | -$36.7K |
|
967
Quanta Services
PWR
$98.1B
| $312K | 0.01% |
7,984
-4,004
| -33% | -$150K |
|
|
MZOR
968
DELISTED
Mazor Robotics Ltd.
MZOR
| $312K | 0.01% |
6,058
-10,249
| -63% | -$577K |
|
969
CALL
Blackrock
BLK
$161B
| $311K | 0.01% |
164
-26
| -14% | -$12.6K |
|
970
PUT
Freeport-McMoran
FCX
$91.3B
| $311K | 0.01% |
4,812
+478
| +11% | +$7.21K |
|
|
EGRX
971
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $311K | 0.01% |
5,830
+3,149
| +117% | +$175K |
|
|
BITA
972
DELISTED
Bitauto Holdings Limited
BITA
| $311K | 0.01% |
+9,805
| New | +$400K |
|
|
FTR
973
DELISTED
Frontier Communications Corp.
FTR
| $311K | 0.01% |
46,066
+25,558
| +125% | +$238K |
|
|
XYZ
974
CALL
Block Inc
XYZ
$45.5B
| $310K | 0.01% |
1,740
+372
| +27% | +$13.6K |
|
|
EV
975
DELISTED
Eaton Vance Corp.
EV
| $310K | 0.01% |
+5,509
| New | +$292K |
|
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.