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 | |
|---|---|---|---|---|---|---|
1051
PUT
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$26.9B
| $201K | 0.01% |
315
+95
| +43% | +$27.5K |
|
|
ECHO
1052
EchoStar
ECHO
$26.5B
| $201K | 0.01% |
4,832
+2,254
| +87% | +$89.5K |
|
|
SAVE
1053
CALL
DELISTED
Spirit Airlines, Inc.
SAVE
| $201K | 0.01% |
257
-398
| -61% | -$20.5K |
|
1054
CALL
ServiceNow
NOW
$95.1B
| $200K | 0.01% |
880
-805
| -48% | -$13K |
|
1055
PUT
CF Industries
CF
$19.5B
| $199K | 0.01% |
1,790
+789
| +79% | +$21.2K |
|
1056
CALL
Fastenal
FAST
$53B
| $199K | 0.01% |
3,308
+844
| +34% | +$9.26K |
|
|
NBIS
1057
Nebius Group N.V.
NBIS
$56.1B
| $199K | 0.01% |
9,935
-12,106
| -55% | -$238K |
|
|
INSY
1058
DELISTED
Insys Therapeutics, Inc.
INSY
| $199K | 0.01% |
21,645
+20,645
| +2,065% | +$233K |
|
1059
Teucrium Corn Fund
CORN
$190M
| $198K | 0.01% |
10,591
+661
| +7% | +$12.6K |
|
1060
Lattice Semiconductor
LSCC
$18.9B
| $198K | 0.01% |
26,982
+24,973
| +1,243% | +$174K |
|
1061
PUT
Ovintiv
OVV
$17.3B
| $198K | 0.01% |
229
+161
| +237% | +$9.17K |
|
1062
PUT
VirnetX Holding Corp
VHC
$52.1M
| $198K | 0.01% |
32
+18
| +129% | +$1.12K |
|
|
ARRY
1063
CALL
DELISTED
Array Biopharma Inc
ARRY
| $198K | 0.01% |
933
+101
| +12% | +$743 |
|
|
CAB
1064
PUT
DELISTED
Cabela's Inc
CAB
| $198K | 0.01% |
658
+623
| +1,780% | +$38.7K |
|
1065
PUT
Bath & Body Works
BBWI
$3.9B
| $197K | 0.01% |
482
+2
| +0.4% | +$114 |
|
1066
Manitowoc
MTW
$503M
| $197K | 0.01% |
+8,236
| New | +$170K |
|
|
1067
Ovintiv
OVV
$17.3B
| $197K | 0.01% |
3,371
-5,644
| -63% | -$322K |
|
1068
STAAR Surgical
STAA
$1.2B
| $197K | 0.01% |
18,231
+15,773
| +642% | +$160K |
|
1069
Banco Macro
BMA
$5.86B
| $196K | 0.01% |
+3,053
| New | +$220K |
|
|
EXAS
1070
CALL
DELISTED
Exact Sciences
EXAS
| $196K | 0.01% |
864
+280
| +48% | +$4.52K |
|
1071
CALL
Viatris
VTRS
$20.1B
| $196K | 0.01% |
1,479
-2,180
| -60% | -$81K |
|
1072
PUT
ProShares UltraShort Industrials
SIJ
$5.78M
| $195K | 0.01% |
13
-3
| -19% | -$1.35K |
|
|
NLSN
1073
DELISTED
Nielsen Holdings plc
NLSN
| $195K | 0.01% |
+4,654
| New | +$214K |
|
|
IPG
1074
DELISTED
Interpublic Group of Companies
IPG
| $194K | 0.01% |
8,306
+7,944
| +2,194% | +$184K |
|
1075
Quad
QUAD
$428M
| $194K | 0.01% |
+7,254
| New | +$188K |
|
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.