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 |
CELG
Celgene Corp
CELG
|
+$31.6M |
| 2 |
Citigroup
C
|
+$19.5M |
| 3 |
AGN
Allergan plc
AGN
|
+$18.4M |
| 4 |
Baidu
BIDU
|
+$18M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$14.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$81.3M |
| 2 |
NVIDIA
NVDA
|
+$60.2M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$48.2M |
| 4 |
Apple
AAPL
|
+$48.2M |
| 5 |
Meta Platforms (Facebook)
META
|
+$31.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 11.27% |
| 2 | Technology | 10.64% |
| 3 | Healthcare | 7.06% |
| 4 | Communication Services | 6.92% |
| 5 | Industrials | 5.66% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
XONE
2326
DELISTED
The ExOne Company
XONE
| $57K | ﹤0.01% |
+6,893
| New | +$72.7K |
|
|
SYNT
2327
DELISTED
Syntel Inc
SYNT
| $57K | ﹤0.01% |
2,500
-10,041
| -80% | -$238K |
|
2328
Booz Allen Hamilton
BAH
$8.7B
| $56K | ﹤0.01% |
+1,484
| New | +$56.1K |
|
2329
CALL
Chegg
CHGG
$108M
| $56K | ﹤0.01% |
208
+113
| +119% | +$1.73K |
|
2330
Canadian Natural Resources
CNQ
$96.9B
| $56K | ﹤0.01% |
+3,237
| New | +$54.4K |
|
2331
Energy Recovery
ERII
$434M
| $56K | ﹤0.01% |
6,419
-51,991
| -89% | -$474K |
|
|
EMBJ
2332
PUT
Embraer S.A. ADS
EMBJ
$11.6B
| $56K | ﹤0.01% |
806
+512
| +174% | +$10.5K |
|
2333
PUT
General Dynamics
GD
$105B
| $56K | ﹤0.01% |
402
-14
| -3% | -$2.86K |
|
2334
PUT
Jabil
JBL
$32.8B
| $56K | ﹤0.01% |
342
+258
| +307% | +$7.31K |
|
2335
CALL
Kimberly-Clark
KMB
$36.4B
| $56K | ﹤0.01% |
147
-521
| -78% | -$60.8K |
|
2336
McEwen Inc
MUX
$1.03B
| $56K | ﹤0.01% |
+2,498
| New | +$50.5K |
|
2337
NNN REIT
NNN
$9.39B
| $56K | ﹤0.01% |
1,309
-1,289
| -50% | -$54.1K |
|
|
HTT
2338
CALL
High Templar Tech Ltd
HTT
$377M
| $56K | ﹤0.01% |
+434
| New | +$8.37K |
|
2339
PUT
Southern Company
SO
$110B
| $56K | ﹤0.01% |
414
-1,010
| -71% | -$51.5K |
|
2340
PUT
Vipshop
VIPS
$6.84B
| $56K | ﹤0.01% |
2,192
+302
| +16% | +$2.67K |
|
|
PDCE
2341
DELISTED
PDC Energy, Inc.
PDCE
| $56K | ﹤0.01% |
1,098
-5,990
| -85% | -$284K |
|
|
WCG
2342
PUT
DELISTED
Wellcare Health Plans, Inc.
WCG
| $56K | ﹤0.01% |
147
+67
| +84% | +$13K |
|
|
MZOR
2343
PUT
DELISTED
Mazor Robotics Ltd.
MZOR
| $56K | ﹤0.01% |
100
-46
| -32% | -$2.59K |
|
|
TEP
2344
DELISTED
Tallgrass Energy Partners, LP
TEP
| $56K | ﹤0.01% |
1,226
+329
| +37% | +$14.9K |
|
|
PRMW
2345
PUT
DELISTED
Primo Water Corporation
PRMW
| $56K | ﹤0.01% |
+1,474
| New | +$17.7K |
|
2346
CALL
Asure Software
ASUR
$220M
| $55K | ﹤0.01% |
+127
| New | +$1.66K |
|
2347
PUT
ATI
ATI
$27B
| $55K | ﹤0.01% |
440
+162
| +58% | +$3.85K |
|
2348
Celestica
CLS
$35.1B
| $55K | ﹤0.01% |
5,339
+2,558
| +92% | +$28.3K |
|
2349
PUT
Cooper Companies
COO
$13.7B
| $55K | ﹤0.01% |
652
+308
| +90% | +$18K |
|
2350
California Water Service
CWT
$3.04B
| $55K | ﹤0.01% |
+1,232
| New | +$53.1K |
|
Similar funds
Simplex Trading's Q4 2017 Portfolio in Review
As of Q4 2017, Simplex Trading held 7,407 positions worth $2.32B, down 5.1% from $2.45B the previous quarter. Its ten largest holdings account for 17% of the portfolio.
Simplex Trading withdrew a net $315M in Q4 2017, closing 1,460 positions and reducing 2,239 holdings. Its most notable exit was iShares 20+ Year Treasury Bond ETF, an estimated $21.1M position sold in full.
By sector, the portfolio is most concentrated in Consumer Discretionary at 11% of assets, down from 14% a quarter earlier, followed by Technology and Healthcare.
Against the trend, Simplex Trading opened a new position in Celgene Corp worth $29.2M.
- Simplex Trading's largest Q4 2017 buy was Celgene Corp: 280,194 shares worth $29.2M.
- Simplex Trading added most to Baidu in Q4 2017, an estimated $18M increase.
- Simplex Trading's biggest Q4 2017 reduction was Amazon, cutting an estimated $81.3M.
- Simplex Trading fully exited iShares 20+ Year Treasury Bond ETF in Q4 2017, selling an estimated $21.1M.
- Simplex Trading's ten largest holdings make up 17% of its $2.32B portfolio in Q4 2017.
- Simplex Trading opened 1,548 new positions and closed 1,460 in Q4 2017.
- Simplex Trading's portfolio value fell 5.1% quarter-over-quarter to $2.32B.
Based on Simplex Trading's 13F filing for Q4 2017, filed 10 Jan 2018.