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 | |
|---|---|---|---|---|---|---|
|
ATHN
976
PUT
DELISTED
Athenahealth, Inc.
ATHN
| $224K | 0.01% |
345
+191
| +124% | +$20.5K |
|
977
PUT
AMC Entertainment Holdings
AMC
$2.04B
| $223K | 0.01% |
+90
| New | +$29.6K |
|
|
NE
978
DELISTED
Noble Corporation
NE
| $223K | 0.01% |
37,735
+13,451
| +55% | +$79.2K |
|
979
CALL
Agnico Eagle Mines
AEM
$72.3B
| $222K | 0.01% |
881
-511
| -37% | -$22.6K |
|
980
CALL
Nexstar Media Group
NXST
$5.53B
| $222K | 0.01% |
675
-31
| -4% | -$1.78K |
|
|
VTLE
981
DELISTED
Vital Energy
VTLE
| $222K | 0.01% |
786
+750
| +2,083% | +$206K |
|
|
EXPR
982
DELISTED
Express, Inc.
EXPR
| $222K | 0.01% |
1,034
-1,174
| -53% | -$288K |
|
|
TLRD
983
CALL
DELISTED
Tailored Brands, Inc.
TLRD
| $222K | 0.01% |
496
+123
| +33% | +$2.38K |
|
|
MLNX
984
DELISTED
Mellanox Technologies, Ltd.
MLNX
| $222K | 0.01% |
5,438
+5,043
| +1,277% | +$213K |
|
985
NovoCure
NVCR
$2.32B
| $221K | 0.01% |
+28,190
| New | +$227K |
|
|
AYR
986
DELISTED
Aircastle Ltd
AYR
| $221K | 0.01% |
10,621
-6,469
| -38% | -$137K |
|
|
CVRR
987
DELISTED
CVR Refining, LP
CVRR
| $221K | 0.01% |
21,346
-5,661
| -21% | -$49.4K |
|
988
CALL
Dollar Tree
DLTR
$22.6B
| $220K | 0.01% |
1,134
+681
| +150% | +$54.8K |
|
|
989
PUT
Dollar Tree
DLTR
$22.6B
| $220K | 0.01% |
568
+245
| +76% | +$19.7K |
|
990
CALL
Exelon
EXC
$48.4B
| $220K | 0.01% |
2,245
+1,509
| +205% | +$35.8K |
|
991
H&R Block
HRB
$5.06B
| $220K | 0.01% |
9,593
+1,186
| +14% | +$27.1K |
|
992
CALL
Cheniere Energy
LNG
$57B
| $220K | 0.01% |
1,867
+543
| +41% | +$21.9K |
|
|
AXON
993
Axon Enterprise
AXON
$39.6B
| $219K | 0.01% |
+9,040
| New | +$223K |
|
994
Canadian Solar
CSIQ
$997M
| $219K | 0.01% |
+18,060
| New | +$236K |
|
|
DATA
995
PUT
DELISTED
Tableau Software, Inc.
DATA
| $219K | 0.01% |
338
+82
| +32% | +$3.82K |
|
996
PUT
Abbott
ABT
$175B
| $218K | 0.01% |
1,753
-1,649
| -48% | -$65.4K |
|
997
Gen Digital
GEN
$15.1B
| $218K | 0.01% |
9,153
-1,365
| -13% | -$33.5K |
|
998
Hershey
HSY
$34.9B
| $218K | 0.01% |
2,112
-60,523
| -97% | -$5.98M |
|
999
PUT
Boston Scientific
BSX
$64.8B
| $217K | 0.01% |
1,494
+1,430
| +2,234% | +$31.2K |
|
|
HES
1000
PUT
DELISTED
Hess
HES
| $217K | 0.01% |
2,606
+451
| +21% | +$24.6K |
|
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.