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 | |
|---|---|---|---|---|---|---|
301
CALL
PayPal
PYPL
$49B
| $1.3M | 0.06% |
3,958
+2,139
| +118% | +$155K |
|
302
Sprouts Farmers Market
SFM
$6.95B
| $1.29M | 0.06% |
53,199
-1,018
| -2% | -$21.6K |
|
303
Teledyne Technologies
TDY
$30.1B
| $1.29M | 0.06% |
+7,109
| New | +$1.25M |
|
|
HES
304
DELISTED
Hess
HES
| $1.28M | 0.06% |
27,066
+22,048
| +439% | +$995K |
|
305
CALL
Freeport-McMoran
FCX
$93.4B
| $1.28M | 0.06% |
4,229
+1,685
| +66% | +$25.4K |
|
|
SHLX
306
DELISTED
Shell Midstream Partners, L.P.
SHLX
| $1.28M | 0.06% |
42,905
+33,323
| +348% | +$905K |
|
|
MOMO
307
PUT
Hello Group
MOMO
$876M
| $1.28M | 0.06% |
2,244
+254
| +13% | +$7.32K |
|
|
FTR
308
PUT
DELISTED
Frontier Communications Corp.
FTR
| $1.28M | 0.05% |
1,623
+660
| +69% | +$6.16K |
|
309
CALL
AbbVie
ABBV
$448B
| $1.27M | 0.05% |
2,588
-432
| -14% | -$40.7K |
|
310
CALL
Delta Air Lines
DAL
$54.9B
| $1.26M | 0.05% |
2,839
+956
| +51% | +$49.9K |
|
311
American Tower
AMT
$77.4B
| $1.26M | 0.05% |
+8,831
| New | +$1.26M |
|
312
SLB Ltd
SLB
$71.3B
| $1.26M | 0.05% |
18,675
-53,868
| -74% | -$3.49M |
|
|
BMS
313
DELISTED
Bemis
BMS
| $1.26M | 0.05% |
+26,307
| New | +$1.22M |
|
314
Coca-Cola
KO
$354B
| $1.25M | 0.05% |
27,322
+23,546
| +624% | +$1.08M |
|
315
CALL
Target
TGT
$62.6B
| $1.25M | 0.05% |
4,305
+2,856
| +197% | +$172K |
|
316
Domino's
DPZ
$10.6B
| $1.25M | 0.05% |
6,615
-5,318
| -45% | -$985K |
|
317
TechnipFMC
FTI
$29.9B
| $1.25M | 0.05% |
53,562
-4,399
| -8% | -$91K |
|
318
Trinity Industries
TRN
$2.87B
| $1.24M | 0.05% |
45,937
+8,281
| +22% | +$207K |
|
|
KLXI
319
DELISTED
KLX Inc.
KLXI
| $1.24M | 0.05% |
21,486
+13,771
| +178% | +$661K |
|
|
RTN
320
DELISTED
Raytheon Company
RTN
| $1.23M | 0.05% |
6,569
-16,469
| -71% | -$3.07M |
|
321
CALL
First Solar
FSLR
$22.4B
| $1.23M | 0.05% |
962
-707
| -42% | -$41.5K |
|
|
GWPH
322
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
| $1.23M | 0.05% |
9,324
-3,335
| -26% | -$392K |
|
323
CALL
Bristol-Myers Squibb
BMY
$124B
| $1.23M | 0.05% |
3,471
-1,074
| -24% | -$67.2K |
|
324
CALL
W.W. Grainger
GWW
$63.9B
| $1.23M | 0.05% |
431
+71
| +20% | +$14.7K |
|
325
PUT
Applied Optoelectronics
AAOI
$8.87B
| $1.22M | 0.05% |
1,467
-771
| -34% | -$34K |
|
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.