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 | |
|---|---|---|---|---|---|---|
2751
PUT
Clean Energy Fuels
CLNE
$447M
| $27K | ﹤0.01% |
142
-510
| -78% | -$1.93K |
|
2752
PUT
Centene
CNC
$31.3B
| $27K | ﹤0.01% |
642
+592
| +1,184% | +$17.5K |
|
|
CTRA
2753
PUT
DELISTED
Coterra Energy
CTRA
| $27K | ﹤0.01% |
1,491
+205
| +16% | +$4.61K |
|
2754
PUT
New Oriental
EDU
$7.84B
| $27K | ﹤0.01% |
110
-22
| -17% | -$1.04K |
|
2755
CALL
Equinix
EQIX
$107B
| $27K | ﹤0.01% |
22
+3
| +16% | +$1.05K |
|
|
2756
PUT
Equinix
EQIX
$107B
| $27K | ﹤0.01% |
193
-183
| -49% | -$64K |
|
2757
CALL
Equity Residential
EQR
$25.4B
| $27K | ﹤0.01% |
111
+94
| +553% | +$5.77K |
|
2758
CALL
Hain Celestial
HAIN
$47.8M
| $27K | ﹤0.01% |
599
-164
| -21% | -$6.14K |
|
2759
Heron Therapeutics
HRTX
$86.3M
| $27K | ﹤0.01% |
+2,067
| New | +$32.4K |
|
|
OPLN
2760
Openlane
OPLN
$4.17B
| $27K | ﹤0.01% |
1,704
-2,864
| -63% | -$45.7K |
|
2761
Lindsay Corp
LNN
$1.16B
| $27K | ﹤0.01% |
+374
| New | +$29.6K |
|
2762
CALL
Magna International
MGA
$17.9B
| $27K | ﹤0.01% |
162
+117
| +260% | +$4.92K |
|
2763
CALL
National Grid
NGG
$82.7B
| $27K | ﹤0.01% |
260
+95
| +58% | +$5.63K |
|
2764
PUT
Navios Maritime Partners
NMM
$2.25B
| $27K | ﹤0.01% |
3
| – | – |
|
2765
CALL
Owens Corning
OC
$11.5B
| $27K | ﹤0.01% |
214
+184
| +613% | +$9.53K |
|
2766
Ollie's Bargain Outlet
OLLI
$4.01B
| $27K | ﹤0.01% |
+963
| New | +$27.8K |
|
2767
CALL
ON Semiconductor
ON
$33.8B
| $27K | ﹤0.01% |
302
-63
| -17% | -$752 |
|
2768
PUT
Pultegroup
PHM
$24.5B
| $27K | ﹤0.01% |
979
+787
| +410% | +$14.9K |
|
2769
PUT
Prospect Capital
PSEC
$1.06B
| $27K | ﹤0.01% |
398
-69
| -15% | -$554 |
|
2770
iShares Mortgage Real Estate ETF
REM
$542M
| $27K | ﹤0.01% |
653
-1,551
| -70% | -$65K |
|
|
SAFE
2771
CALL
Safehold
SAFE
$1.19B
| $27K | ﹤0.01% |
116
+74
| +176% | +$4.22K |
|
2772
PUT
SolarEdge
SEDG
$2.59B
| $27K | ﹤0.01% |
114
-42
| -27% | -$583 |
|
|
SVC
2773
CALL
Service Properties Trust
SVC
$1.1B
| $27K | ﹤0.01% |
50
+35
| +233% | +$5.08K |
|
2774
CALL
Toyota
TM
$210B
| $27K | ﹤0.01% |
310
-31
| -9% | -$3.61K |
|
2775
PUT
Zions Bancorporation
ZION
$10.1B
| $27K | ﹤0.01% |
446
+104
| +30% | +$3.83K |
|
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.