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 | |
|---|---|---|---|---|---|---|
|
TSRO
726
CALL
DELISTED
TESARO, Inc.
TSRO
| $351K | 0.02% |
400
-119
| -23% | -$15K |
|
727
PUT
JD.com
JD
$40.6B
| $350K | 0.02% |
1,156
-1,827
| -61% | -$47.6K |
|
|
CZR
728
DELISTED
Caesars Entertainment Corporation
CZR
| $350K | 0.02% |
41,203
+14,677
| +55% | +$110K |
|
729
Churchill Downs
CHDN
$5.71B
| $347K | 0.02% |
13,854
+4,968
| +56% | +$121K |
|
|
ENDP
730
PUT
DELISTED
Endo International plc
ENDP
| $347K | 0.02% |
342
-960
| -74% | -$16.9K |
|
|
DISH
731
DELISTED
DISH Network Corp.
DISH
| $347K | 0.02% |
6,002
-19,421
| -76% | -$1.11M |
|
732
Hecla Mining
HL
$10.2B
| $346K | 0.02% |
66,053
+28,992
| +78% | +$170K |
|
733
CALL
AB InBev
BUD
$155B
| $345K | 0.02% |
1,018
-174
| -15% | -$19.5K |
|
734
PUT
Altria Group
MO
$121B
| $345K | 0.02% |
3,898
+2,171
| +126% | +$140K |
|
|
CAMP
735
DELISTED
CalAmp Corp.
CAMP
| $345K | 0.02% |
1,035
+906
| +702% | +$298K |
|
736
Bunge Global
BG
$24.2B
| $344K | 0.02% |
4,771
-12,362
| -72% | -$824K |
|
737
Norwegian Cruise Line
NCLH
$8.59B
| $343K | 0.02% |
8,066
-8,642
| -52% | -$346K |
|
738
PUT
lululemon athletica
LULU
$12.6B
| $342K | 0.02% |
1,241
+578
| +87% | +$34.5K |
|
739
CALL
Paychex
PAYX
$39.3B
| $342K | 0.02% |
1,022
+602
| +143% | +$34.7K |
|
|
SYNT
740
DELISTED
Syntel Inc
SYNT
| $341K | 0.02% |
+17,261
| New | +$372K |
|
|
BATS
741
DELISTED
Bats Global Markets, Inc.
BATS
| $341K | 0.02% |
10,181
-24,860
| -71% | -$781K |
|
742
Idacorp
IDA
$8.31B
| $340K | 0.02% |
+4,229
| New | +$326K |
|
743
CALL
Marriott International
MAR
$96.1B
| $339K | 0.02% |
461
-33
| -7% | -$2.48K |
|
744
Nelnet
NNI
$4.73B
| $339K | 0.02% |
6,685
+2,063
| +45% | +$95K |
|
|
VSTO
745
DELISTED
Vista Outdoor Inc.
VSTO
| $339K | 0.02% |
9,189
+8,161
| +794% | +$315K |
|
|
WBA
746
PUT
DELISTED
Walgreens Boots Alliance
WBA
| $338K | 0.02% |
1,794
+547
| +44% | +$45.2K |
|
747
FedEx
FDX
$74.9B
| $337K | 0.02% |
+1,811
| New | +$332K |
|
748
CALL
General Mills
GIS
$19.3B
| $336K | 0.02% |
1,196
+313
| +35% | +$19.4K |
|
|
AL
749
DELISTED
Air Lease Corp
AL
| $335K | 0.02% |
9,785
-19,428
| -67% | -$640K |
|
750
PUT
The Mosaic Company
MOS
$7.16B
| $333K | 0.02% |
1,366
-2,425
| -64% | -$65.1K |
|
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.