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 | |
|---|---|---|---|---|---|---|
1151
PUT
3D Systems Corp
DDD
$423M
| $172K | 0.01% |
353
-331
| -48% | -$4.86K |
|
1152
PUT
Public Storage
PSA
$58.8B
| $172K | 0.01% |
459
+105
| +30% | +$22.3K |
|
|
FLG
1153
Flagstar Bank National Association
FLG
$6.13B
| $172K | 0.01% |
+3,613
| New | +$165K |
|
|
CPE
1154
DELISTED
Callon Petroleum Company
CPE
| $172K | 0.01% |
+1,120
| New | +$171K |
|
1155
PUT
Fastenal
FAST
$53B
| $171K | 0.01% |
1,528
+972
| +175% | +$10.7K |
|
1156
PUT
Radware
RDWR
$1.22B
| $171K | 0.01% |
1,129
-124
| -10% | -$1.65K |
|
1157
PUT
TripAdvisor
TRIP
$1.57B
| $171K | 0.01% |
218
+3
| +1% | +$165 |
|
|
ZEN
1158
DELISTED
ZENDESK INC
ZEN
| $171K | 0.01% |
8,069
-4,322
| -35% | -$105K |
|
|
RTN
1159
CALL
DELISTED
Raytheon Company
RTN
| $170K | 0.01% |
834
+493
| +145% | +$70.1K |
|
|
DISH
1160
PUT
DELISTED
DISH Network Corp.
DISH
| $170K | 0.01% |
786
-68
| -8% | -$3.88K |
|
|
CMA
1161
CALL
DELISTED
Comerica
CMA
| $169K | 0.01% |
577
+246
| +74% | +$14.4K |
|
1162
CALL
Nabors Industries
NBR
$1.25B
| $169K | 0.01% |
17
+1
| +6% | +$704 |
|
1163
Nasdaq
NDAQ
$51.1B
| $169K | 0.01% |
+7,560
| New | +$167K |
|
1164
CALL
Nucor
NUE
$54.9B
| $169K | 0.01% |
663
+377
| +132% | +$21.1K |
|
1165
Prothena Corp
PRTA
$447M
| $169K | 0.01% |
+3,436
| New | +$190K |
|
|
ESRX
1166
CALL
DELISTED
Express Scripts Holding Company
ESRX
| $169K | 0.01% |
1,075
-692
| -39% | -$49.6K |
|
1167
PUT
First Majestic Silver
AG
$8.12B
| $168K | 0.01% |
324
-105
| -24% | -$876 |
|
1168
American Homes 4 Rent
AMH
$11.9B
| $168K | 0.01% |
8,055
+5,761
| +251% | +$119K |
|
1169
CALL
Emerson Electric
EMR
$81.2B
| $168K | 0.01% |
1,206
+817
| +210% | +$43.9K |
|
1170
iShares MSCI Canada ETF
EWC
$6.01B
| $168K | 0.01% |
+6,434
| New | +$166K |
|
|
PARA
1171
CALL
DELISTED
Paramount Global Class B
PARA
| $168K | 0.01% |
720
-470
| -39% | -$27.9K |
|
1172
CALL
Royal Gold
RGLD
$16.9B
| $168K | 0.01% |
488
-135
| -22% | -$9.19K |
|
1173
CALL
Skyworks Solutions
SWKS
$9.1B
| $168K | 0.01% |
965
-624
| -39% | -$48K |
|
1174
CALL
XPO
XPO
$25.1B
| $168K | 0.01% |
1,105
+541
| +96% | +$7.53K |
|
|
MBLY
1175
CALL
DELISTED
Mobileye N.V.
MBLY
| $168K | 0.01% |
2,001
-608
| -23% | -$22.9K |
|
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.