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 | |
|---|---|---|---|---|---|---|
3926
CALL
MarineMax
HZO
$751M
| $8K | ﹤0.01% |
196
-470
| -71% | -$9.08K |
|
3927
CALL
IAMGOLD
IAG
$8.01B
| $8K | ﹤0.01% |
270
+67
| +33% | +$250 |
|
3928
iShares International Treasury Bond ETF
IGOV
$1.51B
| $8K | ﹤0.01% |
+200
| New | +$9.38K |
|
3929
Direxion Daily MSCI India Bull 2X ETF
INDL
$55.6M
| $8K | ﹤0.01% |
+200
| New | +$10.2K |
|
3930
CALL
ING
ING
$93.8B
| $8K | ﹤0.01% |
+155
| New | +$2.09K |
|
3931
PUT
Illinois Tool Works
ITW
$84.9B
| $8K | ﹤0.01% |
103
+31
| +43% | +$3.75K |
|
3932
PUT
JetBlue
JBLU
$2.21B
| $8K | ﹤0.01% |
76
-88
| -54% | -$1.74K |
|
3933
CALL
LKQ Corp
LKQ
$6.72B
| $8K | ﹤0.01% |
610
+451
| +284% | +$14.7K |
|
3934
PUT
Logitech
LOGI
$15.3B
| $8K | ﹤0.01% |
144
-159
| -52% | -$3.8K |
|
3935
PUT
Main Street Capital
MAIN
$5.12B
| $8K | ﹤0.01% |
75
+37
| +97% | +$1.31K |
|
3936
Marchex
MCHX
$78.4M
| $8K | ﹤0.01% |
3,328
+2,059
| +162% | +$5.44K |
|
|
NVO
3937
CALL
Novo Nordisk
NVO
$227B
| $8K | ﹤0.01% |
110
-428
| -80% | -$7.76K |
|
3938
PUT
News Corp Class B
NWS
$17.6B
| $8K | ﹤0.01% |
88
-85
| -49% | -$1.08K |
|
3939
PUT
Pitney Bowes
PBI
$2.41B
| $8K | ﹤0.01% |
22
-31
| -58% | -$493 |
|
3940
Park-Ohio Holdings
PKOH
$548M
| $8K | ﹤0.01% |
+200
| New | +$7.67K |
|
|
PMT
3941
CALL
PennyMac Mortgage Investment
PMT
$849M
| $8K | ﹤0.01% |
+153
| New | +$2.42K |
|
3942
PUT
Insulet
PODD
$11.7B
| $8K | ﹤0.01% |
+88
| New | +$3.28K |
|
3943
CALL
Rapid7
RPD
$634M
| $8K | ﹤0.01% |
340
-317
| -48% | -$4.29K |
|
3944
Revvity
RVTY
$12.4B
| $8K | ﹤0.01% |
+165
| New | +$8.62K |
|
3945
CALL
SAP
SAP
$213B
| $8K | ﹤0.01% |
32
+23
| +256% | +$1.98K |
|
3946
CALL
SBA Communications
SBAC
$18.9B
| $8K | ﹤0.01% |
90
+71
| +374% | +$7.48K |
|
3947
PUT
SFL Corp
SFL
$1.6B
| $8K | ﹤0.01% |
130
-180
| -58% | -$2.52K |
|
3948
CALL
SiriusXM
SIRI
$10.7B
| $8K | ﹤0.01% |
80
+57
| +248% | +$2.48K |
|
3949
PUT
Skywest
SKYW
$4.41B
| $8K | ﹤0.01% |
+479
| New | +$16K |
|
3950
CALL
Trex
TREX
$4.4B
| $8K | ﹤0.01% |
184
+60
| +48% | +$937 |
|
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.