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 | |
|---|---|---|---|---|---|---|
2851
BGC Group
BGC
$5.58B
| $24K | ﹤0.01% |
3,709
-66,645
| -95% | -$404K |
|
2852
PUT
C.H. Robinson
CHRW
$22B
| $24K | ﹤0.01% |
127
+84
| +195% | +$6.08K |
|
2853
CALL
Dominion Energy
D
$62.5B
| $24K | ﹤0.01% |
201
-222
| -52% | -$16.4K |
|
2854
ProShares UltraShort Energy
DUG
$19.7M
| $24K | ﹤0.01% |
+33
| New | +$27.6K |
|
2855
ProShares Ultra MSCI Emerging Markets
EET
$34.8M
| $24K | ﹤0.01% |
482
+52
| +12% | +$2.82K |
|
2856
CALL
EPR Properties
EPR
$4.86B
| $24K | ﹤0.01% |
230
+74
| +47% | +$5.29K |
|
2857
CALL
Gentex
GNTX
$4.88B
| $24K | ﹤0.01% |
59
-86
| -59% | -$1.56K |
|
2858
Global X Lithium & Battery Tech ETF
LIT
$1.49B
| $24K | ﹤0.01% |
1,025
+824
| +410% | +$20.1K |
|
2859
PUT
Lattice Semiconductor
LSCC
$17.6B
| $24K | ﹤0.01% |
+190
| New | +$1.32K |
|
2860
CALL
La-Z-Boy
LZB
$1.59B
| $24K | ﹤0.01% |
+30
| New | +$812 |
|
2861
PUT
Mitek Systems
MITK
$762M
| $24K | ﹤0.01% |
176
+10
| +6% | +$65 |
|
|
NVMI
2862
Nova
NVMI
$13.9B
| $24K | ﹤0.01% |
+1,882
| New | +$23.7K |
|
2863
PUT
Olin
OLN
$2.64B
| $24K | ﹤0.01% |
394
+316
| +405% | +$7.5K |
|
2864
CALL
Papa John's
PZZA
$999M
| $24K | ﹤0.01% |
56
-43
| -43% | -$3.56K |
|
2865
CALL
Rambus
RMBS
$10.4B
| $24K | ﹤0.01% |
240
-189
| -44% | -$2.45K |
|
2866
CALL
Sabre
SABR
$656M
| $24K | ﹤0.01% |
+1,068
| New | +$27.4K |
|
2867
Saic
SAIC
$5.03B
| $24K | ﹤0.01% |
+293
| New | +$22.5K |
|
2868
TD Synnex
SNX
$19.4B
| $24K | ﹤0.01% |
404
-1,824
| -82% | -$103K |
|
2869
PUT
Scorpio Tankers
STNG
$3.96B
| $24K | ﹤0.01% |
71
+66
| +1,320% | +$2.85K |
|
2870
PUT
Teekay Tankers
TNK
$2.63B
| $24K | ﹤0.01% |
30
+10
| +50% | +$196 |
|
2871
PUT
United Therapeutics
UTHR
$26.3B
| $24K | ﹤0.01% |
93
-8
| -8% | -$1.02K |
|
2872
PUT
Vulcan Materials
VMC
$36.3B
| $24K | ﹤0.01% |
116
+95
| +452% | +$11.5K |
|
|
FLG
2873
PUT
Flagstar Bank National Association
FLG
$5.77B
| $24K | ﹤0.01% |
+70
| New | +$3.2K |
|
|
PRTK
2874
CALL
DELISTED
Paratek Pharmaceuticals, Inc.
PRTK
| $24K | ﹤0.01% |
51
-19
| -27% | -$247 |
|
|
AMPE
2875
DELISTED
Ampio Pharmaceuticals Inc.
AMPE
| $24K | ﹤0.01% |
91
+70
| +333% | +$16.7K |
|
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.