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 | |
|---|---|---|---|---|---|---|
|
RAD
176
DELISTED
Rite Aid Corporation
RAD
| $1.52M | 0.09% |
+9,217
| New | +$1.39M |
|
177
PUT
Biogen
BIIB
$30B
| $1.51M | 0.09% |
1,115
+4
| +0.4% | +$1.19K |
|
|
CELG
178
CALL
DELISTED
Celgene Corp
CELG
| $1.51M | 0.09% |
3,680
-149
| -4% | -$16.6K |
|
179
CALL
Baidu
BIDU
$36.8B
| $1.51M | 0.09% |
2,402
-94
| -4% | -$16K |
|
|
B
180
CALL
Barrick Mining
B
$60.9B
| $1.5M | 0.09% |
5,761
+102
| +2% | +$1.62K |
|
181
Zoetis
ZTS
$31.6B
| $1.49M | 0.09% |
+27,841
| New | +$1.42M |
|
182
CALL
Delta Air Lines
DAL
$55.7B
| $1.49M | 0.09% |
3,740
-811
| -18% | -$37K |
|
|
X
183
DELISTED
US Steel
X
| $1.48M | 0.09% |
44,872
-121,528
| -73% | -$3.25M |
|
184
Sherwin-Williams
SHW
$78.5B
| $1.48M | 0.09% |
+16,509
| New | +$1.46M |
|
185
Fidelity National Information Services
FIS
$21.5B
| $1.48M | 0.09% |
+19,529
| New | +$1.49M |
|
|
186
PUT
Goldman Sachs
GS
$320B
| $1.46M | 0.09% |
7,581
+2,333
| +44% | +$474K |
|
187
Cisco
CSCO
$442B
| $1.46M | 0.09% |
48,436
-150,033
| -76% | -$4.57M |
|
|
APC
188
DELISTED
Anadarko Petroleum
APC
| $1.46M | 0.09% |
20,910
+14,303
| +216% | +$930K |
|
189
CALL
Boeing
BA
$161B
| $1.46M | 0.09% |
1,714
+140
| +9% | +$20.4K |
|
190
PUT
CVS Health
CVS
$141B
| $1.45M | 0.09% |
3,747
+2,230
| +147% | +$180K |
|
191
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
$291M
| $1.45M | 0.09% |
35,574
-13,281
| -27% | -$502K |
|
|
DNKN
192
DELISTED
Dunkin' Brands Group, Inc.
DNKN
| $1.45M | 0.09% |
+27,706
| New | +$1.43M |
|
193
PUT
Under Armour Class C
UA
$3.04B
| $1.45M | 0.09% |
2,689
+464
| +21% | +$12.8K |
|
194
CALL
Halliburton
HAL
$27.7B
| $1.45M | 0.09% |
3,574
-106
| -3% | -$5.29K |
|
|
CAB
195
DELISTED
Cabela's Inc
CAB
| $1.43M | 0.09% |
24,492
-26,190
| -52% | -$1.63M |
|
196
CALL
United Airlines
UAL
$38.2B
| $1.43M | 0.09% |
1,587
+78
| +5% | +$4.97K |
|
197
CALL
Invesco QQQ Trust
QQQ
$471B
| $1.43M | 0.09% |
11,742
-1,688
| -13% | -$199K |
|
198
Casey's General Stores
CASY
$31.8B
| $1.42M | 0.08% |
11,958
+6,117
| +105% | +$728K |
|
199
Perrigo
PRGO
$1.45B
| $1.41M | 0.08% |
16,968
+16,770
| +8,470% | +$1.45M |
|
|
LLL
200
DELISTED
L3 Technologies, Inc.
LLL
| $1.41M | 0.08% |
+9,283
| New | +$1.4M |
|
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.