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 | |
|---|---|---|---|---|---|---|
851
CALL
Las Vegas Sands
LVS
$30.5B
| $276K | 0.02% |
1,128
-1,013
| -47% | -$59K |
|
|
AERI
852
DELISTED
Aerie Pharmaceuticals
AERI
| $276K | 0.02% |
7,297
-12,691
| -63% | -$480K |
|
853
DigitalBridge
DBRG
$2.93B
| $275K | 0.02% |
4,616
+1,182
| +34% | +$66.7K |
|
854
G-III Apparel Group
GIII
$1.45B
| $275K | 0.02% |
9,324
-8,743
| -48% | -$254K |
|
855
CALL
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$26.9B
| $275K | 0.02% |
286
-275
| -49% | -$79.5K |
|
856
American Airlines Group
AAL
$8.96B
| $273K | 0.02% |
5,866
-30,029
| -84% | -$1.31M |
|
857
PUT
RTX Corp
RTX
$282B
| $273K | 0.02% |
4,456
-1,738
| -28% | -$115K |
|
|
JUNO
858
DELISTED
Juno Therapeutics, Inc.
JUNO
| $273K | 0.02% |
14,494
-2,026
| -12% | -$49.6K |
|
|
ALXN
859
CALL
DELISTED
Alexion Pharmaceuticals
ALXN
| $272K | 0.02% |
766
+332
| +76% | +$40.6K |
|
860
CALL
Hewlett Packard
HPE
$63.1B
| $271K | 0.02% |
4,883
+3,648
| +295% | +$48.7K |
|
861
CALL
NetEase
NTES
$76.9B
| $271K | 0.02% |
1,325
-75
| -5% | -$3.58K |
|
862
Campbell Soup
CPB
$6.38B
| $270K | 0.02% |
4,467
-437
| -9% | -$24.5K |
|
863
Matsons
MATX
$6.46B
| $270K | 0.02% |
7,657
+7,595
| +12,250% | +$293K |
|
|
ATVI
864
CALL
DELISTED
Activision Blizzard
ATVI
| $269K | 0.02% |
2,001
+535
| +36% | +$21.4K |
|
865
CALL
Darden Restaurants
DRI
$22.2B
| $267K | 0.02% |
673
-66
| -9% | -$4.59K |
|
866
CALL
The Mosaic Company
MOS
$7.08B
| $267K | 0.02% |
1,319
-75
| -5% | -$2.01K |
|
867
Qorvo
QRVO
$7.65B
| $267K | 0.02% |
+5,066
| New | +$276K |
|
868
PUT
APA Corp
APA
$12.9B
| $266K | 0.02% |
1,778
+339
| +24% | +$21.4K |
|
869
CALL
Under Armour Class C
UA
$2.81B
| $266K | 0.02% |
3,198
+1,707
| +114% | +$47.2K |
|
870
PUT
United States Natural Gas Fund
UNG
$473M
| $266K | 0.02% |
129
+77
| +148% | +$10.5K |
|
871
CALL
American Tower
AMT
$76.7B
| $265K | 0.02% |
338
-20
| -6% | -$2.17K |
|
872
ICICI Bank
IBN
$105B
| $265K | 0.02% |
39,015
+12,300
| +46% | +$87.7K |
|
|
FIG
873
DELISTED
Fortress Investment Group Llc
FIG
| $265K | 0.02% |
54,725
+8,136
| +17% | +$41.3K |
|
874
PUT
Transocean
RIG
$5.89B
| $264K | 0.02% |
3,528
+574
| +19% | +$6.8K |
|
|
GLBL
875
DELISTED
TerraForm Global, Inc. Class A Common Stock
GLBL
| $263K | 0.02% |
+66,795
| New | +$258K |
|
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.