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 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$49.8M |
| 2 |
Apple
AAPL
|
+$24.5M |
| 3 |
Citigroup
C
|
+$23.5M |
| 4 |
Amazon
AMZN
|
+$22.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
+$17.4M |
| 2 |
Wells Fargo
WFC
|
+$13.5M |
| 3 |
MDVN
MEDIVATION, INC.
MDVN
|
+$8.62M |
| 4 |
Goldman Sachs
GS
|
+$8.5M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$8.15M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.76% |
| 2 | Technology | 7.19% |
| 3 | Healthcare | 6.91% |
| 4 | Consumer Discretionary | 6.53% |
| 5 | Financials | 5.37% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
ESV
1126
PUT
DELISTED
Ensco Rowan plc
ESV
| $180K | 0.01% |
124
-176
| -59% | -$6.31K |
|
|
SHPG
1127
PUT
DELISTED
Shire pic
SHPG
| $180K | 0.01% |
94
-165
| -64% | -$29.2K |
|
|
ESPR
1128
DELISTED
Esperion Therapeutics
ESPR
| $179K | 0.01% |
14,353
-1,962
| -12% | -$23.4K |
|
1129
PUT
Range Resources
RRC
$9.08B
| $179K | 0.01% |
505
-372
| -42% | -$13.3K |
|
1130
PUT
Target
TGT
$61.1B
| $179K | 0.01% |
2,848
-1,755
| -38% | -$127K |
|
|
KATE
1131
CALL
DELISTED
Kate Spade & Company
KATE
| $179K | 0.01% |
1,251
+678
| +118% | +$11.1K |
|
|
HZN
1132
DELISTED
Horizon Global Corporation
HZN
| $178K | 0.01% |
+7,454
| New | +$168K |
|
1133
CALL
AutoZone
AZO
$47.7B
| $177K | 0.01% |
333
-496
| -60% | -$382K |
|
1134
Coeur Mining
CDE
$15.7B
| $177K | 0.01% |
+19,579
| New | +$201K |
|
1135
La-Z-Boy
LZB
$1.55B
| $177K | 0.01% |
+5,724
| New | +$155K |
|
|
WMGI
1136
DELISTED
Wright Medical Group Inc
WMGI
| $177K | 0.01% |
+7,716
| New | +$179K |
|
1137
CALL
Illumina
ILMN
$29.8B
| $176K | 0.01% |
524
+164
| +46% | +$22.1K |
|
|
JWN
1138
DELISTED
Nordstrom
JWN
| $176K | 0.01% |
+3,674
| New | +$200K |
|
1139
PUT
Lowe's Companies
LOW
$113B
| $176K | 0.01% |
1,917
+542
| +39% | +$38.3K |
|
1140
Masco
MAS
$15.6B
| $176K | 0.01% |
+5,583
| New | +$179K |
|
|
VALE.P
1141
CALL
DELISTED
Vale S A
VALE.P
| $176K | 0.01% |
2,959
+1,527
| +107% | +$10.1K |
|
1142
Advance Auto Parts
AAP
$3.22B
| $175K | 0.01% |
+1,036
| New | +$163K |
|
|
ISEE
1143
PUT
DELISTED
IVERIC bio, Inc. Common Stock
ISEE
| $175K | 0.01% |
1,085
+705
| +186% | +$20.9K |
|
1144
CALL
Halozyme
HALO
$9.59B
| $174K | 0.01% |
1,687
+701
| +71% | +$7.68K |
|
1145
Rambus
RMBS
$11.2B
| $174K | 0.01% |
12,641
+3,832
| +44% | +$49.6K |
|
|
PBFX
1146
DELISTED
PBF LOGISTICS LP
PBFX
| $174K | 0.01% |
9,574
-1,964
| -17% | -$37K |
|
1147
PUT
CorMedix
CRMD
$632M
| $173K | 0.01% |
57
+49
| +613% | +$496 |
|
1148
PUT
Alaunos Therapeutics
TCRT
$4.69M
| $173K | 0.01% |
4
-1
| -20% | -$901 |
|
1149
PUT
Teck Resources
TECK
$29.4B
| $173K | 0.01% |
1,703
-561
| -25% | -$12.1K |
|
|
SINA
1150
CALL
DELISTED
Sina Corp
SINA
| $173K | 0.01% |
721
-86
| -11% | -$6.16K |
|
Similar funds
Simplex Trading's Q4 2016 Portfolio in Review
As of Q4 2016, Simplex Trading held 7,301 positions worth $1.67B, up 13% from $1.48B the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $181M of net new capital in Q4 2016, opening 1,543 new positions and adding to 2,137 existing holdings. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
By sector, the portfolio is most concentrated in Communication Services at 8.8% of assets, up from 8.4% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Goldman Sachs, an estimated $8.5M trimmed.
- Simplex Trading's largest Q4 2016 buy was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
- Simplex Trading added most to Apple in Q4 2016, an estimated $24.5M increase.
- Simplex Trading's biggest Q4 2016 reduction was Goldman Sachs, cutting an estimated $8.5M.
- Simplex Trading fully exited LinkedIn Corporation in Q4 2016, selling an estimated $17.4M.
- Simplex Trading's ten largest holdings make up 20% of its $1.67B portfolio in Q4 2016.
- Simplex Trading opened 1,543 new positions and closed 1,480 in Q4 2016.
- Simplex Trading's portfolio value rose 13% quarter-over-quarter to $1.67B.
Based on Simplex Trading's 13F filing for Q4 2016, filed 11 Jan 2017.