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 |
LNKD
LinkedIn Corporation
LNKD
|
+$21.4M |
| 2 |
SPDR Gold Trust
GLD
|
+$17.3M |
| 3 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$15M |
| 4 |
Biogen
BIIB
|
+$14.9M |
| 5 |
Visa
V
|
+$14.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$36.7M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$20.1M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$15.8M |
| 4 |
Citigroup
C
|
+$14.7M |
| 5 |
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
|
+$13.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 6.61% |
| 2 | Healthcare | 6.55% |
| 3 | Technology | 6.45% |
| 4 | Consumer Discretionary | 4.54% |
| 5 | Financials | 4.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
UWC
201
CALL
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $1.41M | 0.09% |
1,673
+285
| +21% | +$240K |
|
|
202
PUT
Visa
V
$677B
| $1.38M | 0.09% |
4,767
+2,739
| +135% | +$214K |
|
203
CALL
Micron Technology
MU
$1.1T
| $1.36M | 0.09% |
8,478
+6,234
| +278% | +$70.8K |
|
204
Blackstone
BX
$152B
| $1.35M | 0.09% |
55,171
-33,322
| -38% | -$886K |
|
205
Salesforce
CRM
$139B
| $1.35M | 0.09% |
17,039
-11,750
| -41% | -$922K |
|
|
ESRX
206
DELISTED
Express Scripts Holding Company
ESRX
| $1.35M | 0.09% |
+17,810
| New | +$1.31M |
|
207
United States Oil Fund
USO
$2.31B
| $1.35M | 0.09% |
+14,544
| New | +$1.3M |
|
208
US Bancorp
USB
$98.4B
| $1.34M | 0.09% |
+33,205
| New | +$1.38M |
|
209
PUT
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $1.33M | 0.09% |
4,373
+1,088
| +33% | +$193K |
|
|
CST
210
DELISTED
CST Brands, Inc.
CST
| $1.33M | 0.09% |
30,824
+8,508
| +38% | +$337K |
|
211
PUT
Regeneron Pharmaceuticals
REGN
$70.5B
| $1.33M | 0.09% |
376
+143
| +61% | +$55.1K |
|
|
212
Broadcom
AVGO
$1.84T
| $1.32M | 0.09% |
85,250
-2,408,150
| -97% | -$36.7M |
|
213
CALL
Newmont
NEM
$98.7B
| $1.32M | 0.09% |
2,160
-947
| -30% | -$31.4K |
|
214
Southwest Airlines
LUV
$23.8B
| $1.31M | 0.09% |
33,536
+19,777
| +144% | +$846K |
|
215
Teck Resources
TECK
$27.8B
| $1.31M | 0.09% |
+99,812
| New | +$1.03M |
|
|
ARIA
216
DELISTED
Ariad Pharmaceuticals Inc
ARIA
| $1.31M | 0.09% |
177,916
+133,255
| +298% | +$1,000K |
|
217
CALL
GE Aerospace
GE
$353B
| $1.31M | 0.09% |
1,510
+154
| +11% | +$22.5K |
|
218
PUT
Boeing
BA
$161B
| $1.3M | 0.09% |
5,599
+2,426
| +76% | +$316K |
|
219
BioMarin Pharmaceuticals
BMRN
$11.4B
| $1.29M | 0.09% |
16,603
+16,011
| +2,705% | +$1.36M |
|
220
PUT
Devon Energy
DVN
$50.9B
| $1.28M | 0.09% |
3,477
+29
| +0.8% | +$983 |
|
221
Herbalife
HLF
$1.27B
| $1.25M | 0.08% |
42,892
-122,690
| -74% | -$3.67M |
|
|
CELG
222
PUT
DELISTED
Celgene Corp
CELG
| $1.25M | 0.08% |
3,650
+2,179
| +148% | +$225K |
|
223
CALL
American International
AIG
$42.5B
| $1.25M | 0.08% |
2,690
-1,122
| -29% | -$61.9K |
|
224
PUT
Qualcomm
QCOM
$183B
| $1.23M | 0.08% |
3,058
+1,115
| +57% | +$58.8K |
|
225
CALL
Intel
INTC
$530B
| $1.21M | 0.08% |
4,795
-579
| -11% | -$18.1K |
|
Similar funds
Simplex Trading's Q2 2016 Portfolio in Review
As of Q2 2016, Simplex Trading held 7,153 positions worth $1.5B, up 19% from $1.25B the previous quarter. Its ten largest holdings account for 19% of the portfolio.
Simplex Trading deployed $178M of net new capital in Q2 2016, opening 1,586 new positions and adding to 2,321 existing holdings. Its largest new stake was Biogen: 56,467 shares worth $13.7M.
By sector, the portfolio is most concentrated in Communication Services at 6.6% of assets, down from 6.9% a quarter earlier, followed by Healthcare and Technology.
On the sell side, the largest reduction was Broadcom, an estimated $36.7M trimmed.
- Simplex Trading's largest Q2 2016 buy was Biogen: 56,467 shares worth $13.7M.
- Simplex Trading added most to LinkedIn Corporation in Q2 2016, an estimated $21.4M increase.
- Simplex Trading's biggest Q2 2016 reduction was Broadcom, cutting an estimated $36.7M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q2 2016, selling an estimated $20.1M.
- Simplex Trading's ten largest holdings make up 19% of its $1.5B portfolio in Q2 2016.
- Simplex Trading opened 1,586 new positions and closed 1,363 in Q2 2016.
- Simplex Trading's portfolio value rose 19% quarter-over-quarter to $1.5B.
Based on Simplex Trading's 13F filing for Q2 2016, filed 18 Jul 2016.