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 | |
|---|---|---|---|---|---|---|
376
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $1.06M | 0.05% |
320
-443
| -58% | -$65.6K |
|
377
CALL
Cboe Global Markets
CBOE
$29.5B
| $1.06M | 0.05% |
1,066
+413
| +63% | +$48.3K |
|
378
PUT
Amgen
AMGN
$198B
| $1.05M | 0.05% |
2,433
-12
| -0.5% | -$2.12K |
|
|
EGN
379
DELISTED
Energen
EGN
| $1.05M | 0.05% |
18,269
+8,017
| +78% | +$435K |
|
380
PUT
American International
AIG
$41.5B
| $1.05M | 0.05% |
2,391
+731
| +44% | +$44.9K |
|
|
GOOS
381
Canada Goose Holdings
GOOS
$952M
| $1.04M | 0.05% |
33,131
+29,263
| +757% | +$718K |
|
|
CTRA
382
DELISTED
Coterra Energy
CTRA
| $1.04M | 0.04% |
36,489
+12,356
| +51% | +$339K |
|
383
MGM Resorts International
MGM
$11.6B
| $1.04M | 0.04% |
31,265
-124,420
| -80% | -$4.01M |
|
384
The Mosaic Company
MOS
$7.24B
| $1.04M | 0.04% |
40,653
-33,607
| -45% | -$772K |
|
385
PUT
VanEck Gold Miners ETF
GDX
$23.4B
| $1.04M | 0.04% |
11,005
-4,917
| -31% | -$112K |
|
386
Ionis Pharmaceuticals
IONS
$8.93B
| $1.04M | 0.04% |
+20,730
| New | +$1.14M |
|
|
EVHC
387
DELISTED
Envision Healthcare Holdings Inc
EVHC
| $1.04M | 0.04% |
30,132
-19,804
| -40% | -$693K |
|
388
PUT
Energous
WATT
$84.8M
| $1.04M | 0.04% |
4
+3
| +300% | +$18.9K |
|
389
NETGEAR
NTGR
$661M
| $1.03M | 0.04% |
17,592
+15,674
| +817% | +$803K |
|
390
CALL
Riot Platforms
RIOT
$8.84B
| $1.03M | 0.04% |
+3,027
| New | +$42.5K |
|
391
Vanguard FTSE Emerging Markets ETF
VWO
$121B
| $1.03M | 0.04% |
22,434
+5,673
| +34% | +$254K |
|
|
APC
392
DELISTED
Anadarko Petroleum
APC
| $1.03M | 0.04% |
19,170
-62,472
| -77% | -$3.07M |
|
393
CALL
C.H. Robinson
CHRW
$24.4B
| $1.02M | 0.04% |
1,075
+99
| +10% | +$8.08K |
|
394
BioMarin Pharmaceuticals
BMRN
$11.3B
| $1.02M | 0.04% |
+11,482
| New | +$998K |
|
395
JetBlue
JBLU
$1.92B
| $1.02M | 0.04% |
+45,805
| New | +$936K |
|
396
SFL Corp
SFL
$1.51B
| $1.02M | 0.04% |
+65,663
| New | +$985K |
|
397
GoDaddy
GDDY
$11.8B
| $1.01M | 0.04% |
20,156
+4,902
| +32% | +$232K |
|
|
CIT
398
DELISTED
CIT Group Inc.
CIT
| $1.01M | 0.04% |
+20,580
| New | +$998K |
|
399
Sarepta Therapeutics
SRPT
$1.67B
| $1.01M | 0.04% |
18,199
-28,197
| -61% | -$1.49M |
|
|
DFS
400
DELISTED
Discover Financial Services
DFS
| $1M | 0.04% |
13,070
+2,978
| +30% | +$205K |
|
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.