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 | |
|---|---|---|---|---|---|---|
|
STZ.B
276
CALL
DELISTED
CONSTELLATION BRANDS, INC. CLASS B
STZ.B
| $1.39M | 0.06% |
837
+612
| +272% | +$133K |
|
277
CALL
Verizon
VZ
$185B
| $1.39M | 0.06% |
3,778
-3,311
| -47% | -$163K |
|
278
Qualcomm
QCOM
$186B
| $1.39M | 0.06% |
21,641
-229,651
| -91% | -$13.9M |
|
|
UWC
279
CALL
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $1.39M | 0.06% |
1,338
+41
| +3% | +$42.4K |
|
280
Royal Gold
RGLD
$17B
| $1.38M | 0.06% |
+16,789
| New | +$1.44M |
|
|
AVXS
281
DELISTED
AveXis, Inc. Common Stock
AVXS
| $1.37M | 0.06% |
+12,375
| New | +$1.24M |
|
282
Seagate
STX
$207B
| $1.37M | 0.06% |
+32,676
| New | +$1.25M |
|
283
CarMax
KMX
$8.19B
| $1.36M | 0.06% |
+21,280
| New | +$1.52M |
|
284
Ralph Lauren
RL
$23B
| $1.36M | 0.06% |
+13,090
| New | +$1.21M |
|
285
CALL
American Airlines Group
AAL
$10.1B
| $1.36M | 0.06% |
4,470
+355
| +9% | +$17.7K |
|
286
CALL
Fastenal
FAST
$51.9B
| $1.35M | 0.06% |
4,960
+976
| +24% | +$12.1K |
|
287
Radware
RDWR
$1.25B
| $1.35M | 0.06% |
69,647
-117,016
| -63% | -$2.22M |
|
288
CALL
CME Group
CME
$90.8B
| $1.35M | 0.06% |
1,253
+869
| +226% | +$124K |
|
289
CALL
3M
MMM
$89.2B
| $1.35M | 0.06% |
1,124
-524
| -32% | -$101K |
|
290
PUT
Regeneron Pharmaceuticals
REGN
$68.5B
| $1.34M | 0.06% |
1,185
+301
| +34% | +$122K |
|
291
PUT
SLB Ltd
SLB
$71B
| $1.33M | 0.06% |
5,423
+311
| +6% | +$20.2K |
|
292
CALL
AT&T
T
$159B
| $1.32M | 0.06% |
6,153
+165
| +3% | +$4.51K |
|
293
CALL
Waste Management
WM
$94.7B
| $1.32M | 0.06% |
913
+47
| +5% | +$3.83K |
|
|
TFCF
294
CALL
DELISTED
Twenty-First Century Fox, Inc. Class B
TFCF
| $1.32M | 0.06% |
4,120
+2,762
| +203% | +$80.7K |
|
295
Valero Energy
VLO
$92.5B
| $1.31M | 0.06% |
14,288
+6,476
| +83% | +$534K |
|
296
CALL
Walt Disney
DIS
$168B
| $1.31M | 0.06% |
5,213
+1,227
| +31% | +$126K |
|
297
Align Technology
ALGN
$12.5B
| $1.31M | 0.06% |
+5,887
| New | +$1.34M |
|
|
SHNY
298
PUT
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $1.3M | 0.06% |
5,117
+284
| +6% | +$2.63K |
|
|
DISH
299
DELISTED
DISH Network Corp.
DISH
| $1.3M | 0.06% |
27,238
-56,990
| -68% | -$2.84M |
|
300
PUT
Mastercard
MA
$472B
| $1.3M | 0.06% |
4,627
+2,250
| +95% | +$335K |
|
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.