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 | |
|---|---|---|---|---|---|---|
3551
PUT
British American Tobacco
BTI
$134B
| $15K | ﹤0.01% |
403
-116
| -22% | -$7.56K |
|
3552
CALL
CBRE Group
CBRE
$43.1B
| $15K | ﹤0.01% |
282
+226
| +404% | +$9.37K |
|
3553
CALL
Canadian Pacific Kansas City
CP
$81.4B
| $15K | ﹤0.01% |
100
-145
| -59% | -$5.05K |
|
3554
PUT
Brinker International
EAT
$8.5B
| $15K | ﹤0.01% |
153
-400
| -72% | -$13.8K |
|
3555
CALL
Edison International
EIX
$30.7B
| $15K | ﹤0.01% |
+153
| New | +$11.7K |
|
3556
PUT
Forestar Group
FOR
$1.5B
| $15K | ﹤0.01% |
86
-780
| -90% | -$15.2K |
|
3557
CALL
Invesco CurrencyShares Japanese Yen Trust
FXY
$426M
| $15K | ﹤0.01% |
499
+85
| +21% | +$7.23K |
|
3558
CALL
The GEO Group
GEO
$4.11B
| $15K | ﹤0.01% |
185
+74
| +67% | +$1.88K |
|
|
3559
PUT
The GEO Group
GEO
$4.11B
| $15K | ﹤0.01% |
+117
| New | +$2.97K |
|
3560
PUT
Globus Medical
GMED
$10.9B
| $15K | ﹤0.01% |
77
-121
| -61% | -$4.24K |
|
3561
Goldgroup Mining Inc.
GORO
$152M
| $15K | ﹤0.01% |
3,613
-1,041
| -22% | -$4.07K |
|
3562
PUT
Hasbro
HAS
$13.6B
| $15K | ﹤0.01% |
115
+62
| +117% | +$5.82K |
|
3563
PUT
Huntington Bancshares
HBAN
$35B
| $15K | ﹤0.01% |
852
+679
| +392% | +$9.54K |
|
3564
PUT
HP
HPQ
$25.9B
| $15K | ﹤0.01% |
170
-337
| -66% | -$7.17K |
|
3565
CALL
International Flavors & Fragrances
IFF
$20.2B
| $15K | ﹤0.01% |
42
+14
| +50% | +$2.1K |
|
3566
PUT
Innoviva
INVA
$1.61B
| $15K | ﹤0.01% |
+129
| New | +$1.72K |
|
3567
JELD-WEN Holding
JELD
$98.2M
| $15K | ﹤0.01% |
+391
| New | +$14.5K |
|
3568
CALL
LSB Industries
LXU
$822M
| $15K | ﹤0.01% |
343
+307
| +853% | +$1.93K |
|
3569
CALL
McCormick & Company Non-Voting
MKC
$13.9B
| $15K | ﹤0.01% |
96
-172
| -64% | -$8.57K |
|
3570
PUT
Nasdaq
NDAQ
$53.6B
| $15K | ﹤0.01% |
+477
| New | +$12K |
|
3571
Neurogene
NGNE
$663M
| $15K | ﹤0.01% |
65
+60
| +1,200% | +$14.1K |
|
3572
Navigator Holdings
NVGS
$1.34B
| $15K | ﹤0.01% |
+1,589
| New | +$16.5K |
|
|
NVO
3573
PUT
Novo Nordisk
NVO
$225B
| $15K | ﹤0.01% |
130
+68
| +110% | +$1.73K |
|
3574
CALL
Oneok
OKE
$55.9B
| $15K | ﹤0.01% |
132
-1,357
| -91% | -$72.4K |
|
3575
PUT
OraSure Technologies
OSUR
$277M
| $15K | ﹤0.01% |
+99
| New | +$1.79K |
|
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.