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 | |
|---|---|---|---|---|---|---|
|
EVHC
926
DELISTED
Envision Healthcare Holdings Inc
EVHC
| $241K | 0.01% |
3,809
+1,698
| +80% | +$111K |
|
|
DDC
927
DELISTED
Dominion Diamond Corporation
DDC
| $241K | 0.01% |
24,947
+20,161
| +421% | +$184K |
|
928
CALL
Salesforce
CRM
$129B
| $240K | 0.01% |
2,465
-421
| -15% | -$30.6K |
|
929
CALL
Regeneron Pharmaceuticals
REGN
$68.3B
| $240K | 0.01% |
801
+226
| +39% | +$85.9K |
|
930
ProShares Ultra Dow30
DDM
$526M
| $238K | 0.01% |
17,094
+8,274
| +94% | +$105K |
|
|
ELOS
931
DELISTED
Syneron Medical Ltd
ELOS
| $238K | 0.01% |
28,398
+27,133
| +2,145% | +$213K |
|
932
CALL
Delek US
DK
$3.97B
| $237K | 0.01% |
599
+542
| +951% | +$10.6K |
|
933
Methanex
MEOH
$4.49B
| $237K | 0.01% |
5,419
-7,439
| -58% | -$297K |
|
|
MLPI
934
DELISTED
UBS E-TRACS Alerian MLP Infrastructure ETN
MLPI
| $237K | 0.01% |
+8,358
| New | +$228K |
|
935
PUT
Kinder Morgan
KMI
$72.9B
| $236K | 0.01% |
3,576
+332
| +10% | +$7.02K |
|
936
CALL
L3Harris
LHX
$55.8B
| $236K | 0.01% |
261
-229
| -47% | -$22.6K |
|
|
PE
937
DELISTED
PARSLEY ENERGY INC
PE
| $236K | 0.01% |
6,712
+4,886
| +268% | +$173K |
|
|
WPZ
938
DELISTED
Williams Partners L.P.
WPZ
| $236K | 0.01% |
+6,215
| New | +$223K |
|
|
INVN
939
CALL
DELISTED
Invensense Inc
INVN
| $235K | 0.01% |
822
+744
| +954% | +$6.36K |
|
|
ADPT
940
DELISTED
Adeptus Health Inc
ADPT
| $233K | 0.01% |
30,564
+22,906
| +299% | +$421K |
|
|
ASRT
941
DELISTED
Assertio
ASRT
| $232K | 0.01% |
215
-706
| -77% | -$899K |
|
942
Brookdale Senior Living
BKD
$3.46B
| $232K | 0.01% |
18,732
-8,022
| -30% | -$108K |
|
943
PTC Therapeutics
PTCT
$6.51B
| $232K | 0.01% |
21,315
-98,895
| -82% | -$1.04M |
|
944
Smith & Wesson
SWBI
$645M
| $232K | 0.01% |
+14,331
| New | +$265K |
|
|
UNIT
945
Uniti Group
UNIT
$2.68B
| $232K | 0.01% |
+9,158
| New | +$247K |
|
|
TRTN
946
DELISTED
Triton International Limited
TRTN
| $232K | 0.01% |
+14,699
| New | +$236K |
|
947
Alaska Air
ALK
$4.99B
| $231K | 0.01% |
+2,606
| New | +$205K |
|
|
K
948
DELISTED
Kellanova
K
| $231K | 0.01% |
+3,342
| New | +$232K |
|
949
PUT
Royal Caribbean
RCL
$76B
| $231K | 0.01% |
921
-53
| -5% | -$4.17K |
|
950
CALL
McDonald's
MCD
$187B
| $230K | 0.01% |
699
-996
| -59% | -$117K |
|
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.