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 | |
|---|---|---|---|---|---|---|
|
IMGN
1701
DELISTED
Immunogen Inc
IMGN
| $83K | 0.01% |
40,785
+6,136
| +18% | +$12.3K |
|
|
WWE
1702
DELISTED
World Wrestling Entertainment
WWE
| $83K | 0.01% |
4,520
+3,229
| +250% | +$61.2K |
|
|
ACIA
1703
CALL
DELISTED
Acacia Communications Inc
ACIA
| $83K | 0.01% |
172
+76
| +79% | +$5.79K |
|
|
AMTD
1704
CALL
DELISTED
TD Ameritrade Holding Corp
AMTD
| $83K | 0.01% |
133
-40
| -23% | -$1.55K |
|
|
FGP
1705
PUT
DELISTED
Ferrellgas Partners, L.P.
FGP
| $83K | 0.01% |
270
+117
| +76% | +$937 |
|
1706
PUT
Cognizant
CTSH
$21.5B
| $82K | ﹤0.01% |
981
+523
| +114% | +$28K |
|
1707
PUT
Jacobs Solutions
J
$15.9B
| $82K | ﹤0.01% |
+156
| New | +$7.18K |
|
1708
CALL
CarMax
KMX
$8.27B
| $82K | ﹤0.01% |
373
+236
| +172% | +$13.2K |
|
1709
PUT
Coca-Cola
KO
$354B
| $82K | ﹤0.01% |
1,326
-3,492
| -72% | -$145K |
|
1710
PUT
Moody's
MCO
$81.7B
| $82K | ﹤0.01% |
475
+446
| +1,538% | +$45K |
|
1711
CALL
MGIC Investment
MTG
$6.27B
| $82K | ﹤0.01% |
927
+406
| +78% | +$3.67K |
|
1712
PUT
ProShares Ultra S&P500
SSO
$7.82B
| $82K | ﹤0.01% |
4,416
-5,872
| -57% | -$53.1K |
|
1713
PUT
Sunoco
SUN
$14.2B
| $82K | ﹤0.01% |
660
+451
| +216% | +$11.7K |
|
1714
PUT
Teleflex
TFX
$5.85B
| $82K | ﹤0.01% |
129
+74
| +135% | +$11.5K |
|
|
WBC
1715
DELISTED
WABCO HOLDINGS INC.
WBC
| $82K | ﹤0.01% |
+777
| New | +$81.2K |
|
|
CLD
1716
DELISTED
Cloud Peak Energy Inc
CLD
| $82K | ﹤0.01% |
14,753
-12,217
| -45% | -$73.7K |
|
|
IPXL
1717
DELISTED
Impax Laboratories, Inc.
IPXL
| $82K | ﹤0.01% |
6,221
+287
| +5% | +$4.91K |
|
|
SHPG
1718
CALL
DELISTED
Shire pic
SHPG
| $82K | ﹤0.01% |
348
-783
| -69% | -$139K |
|
1719
Advanced Energy
AEIS
$12.2B
| $81K | ﹤0.01% |
1,484
-238
| -14% | -$12.2K |
|
1720
CALL
Barclays
BCS
$94.1B
| $81K | ﹤0.01% |
615
-357
| -37% | -$3.37K |
|
1721
CALL
Heritage Insurance Holdings
HRTG
$842M
| $81K | ﹤0.01% |
912
+712
| +356% | +$9.91K |
|
1722
CALL
LiveRamp
RAMP
$2.29B
| $81K | ﹤0.01% |
180
| – | – |
|
1723
PUT
Stratasys
SSYS
$697M
| $81K | ﹤0.01% |
115
-31
| -21% | -$608 |
|
|
JOYY
1724
CALL
JOYY Inc
JOYY
$3.73B
| $81K | ﹤0.01% |
1,118
-103
| -8% | -$4.84K |
|
|
ELLI
1725
PUT
DELISTED
Ellie Mae Inc
ELLI
| $81K | ﹤0.01% |
285
+209
| +275% | +$19.3K |
|
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.