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 | |
|---|---|---|---|---|---|---|
|
IMGN
1376
DELISTED
Immunogen Inc
IMGN
| $174K | 0.01% |
+27,268
| New | +$168K |
|
1377
CALL
Applied Optoelectronics
AAOI
$8.99B
| $173K | 0.01% |
645
-1,070
| -62% | -$47.2K |
|
1378
Asbury Automotive
ABG
$4.14B
| $173K | 0.01% |
+2,713
| New | +$170K |
|
|
SKX
1379
CALL
DELISTED
Skechers
SKX
| $173K | 0.01% |
300
+39
| +15% | +$1.26K |
|
|
RDUS
1380
PUT
DELISTED
Radius Health, Inc.
RDUS
| $173K | 0.01% |
371
+266
| +253% | +$8.35K |
|
1381
CALL
Air Products & Chemicals
APD
$65.5B
| $172K | 0.01% |
275
+151
| +122% | +$24K |
|
1382
Quanex
NX
$839M
| $172K | 0.01% |
7,372
+6,815
| +1,224% | +$151K |
|
1383
CALL
Paychex
PAYX
$39.4B
| $172K | 0.01% |
1,048
+47
| +5% | +$3.08K |
|
1384
CALL
Trinity Industries
TRN
$2.92B
| $172K | 0.01% |
526
-203
| -28% | -$5.06K |
|
|
PTLA
1385
PUT
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $172K | 0.01% |
310
+103
| +50% | +$5.21K |
|
|
GNC
1386
PUT
DELISTED
GNC Holdings, Inc.
GNC
| $172K | 0.01% |
202
-248
| -55% | -$1.56K |
|
1387
IMAX
IMAX
$2.41B
| $171K | 0.01% |
7,409
+2,152
| +41% | +$50.7K |
|
1388
CALL
Keurig Dr Pepper
KDP
$40.4B
| $171K | 0.01% |
258
-115
| -31% | -$10.3K |
|
1389
PUT
Advanced Energy
AEIS
$12.6B
| $170K | 0.01% |
292
+178
| +156% | +$14.3K |
|
1390
CALL
Newell Brands
NWL
$2.14B
| $170K | 0.01% |
1,113
+600
| +117% | +$20.7K |
|
|
SREV
1391
DELISTED
ServiceSource International, Inc.
SREV
| $170K | 0.01% |
55,071
+39,506
| +254% | +$127K |
|
|
FDC
1392
DELISTED
First Data Corporation
FDC
| $170K | 0.01% |
+10,188
| New | +$175K |
|
1393
PUT
Colgate-Palmolive
CL
$72.1B
| $169K | 0.01% |
1,837
-56
| -3% | -$4.09K |
|
|
HES
1394
PUT
DELISTED
Hess
HES
| $169K | 0.01% |
2,040
+742
| +57% | +$33.5K |
|
1395
PUT
Petrobras
PBR
$122B
| $169K | 0.01% |
1,287
+858
| +200% | +$8.77K |
|
1396
CALL
VF Corp
VFC
$6.49B
| $169K | 0.01% |
377
+110
| +41% | +$7.27K |
|
|
CBI
1397
DELISTED
Chicago Bridge & Iron Nv
CBI
| $169K | 0.01% |
10,527
+8,384
| +391% | +$137K |
|
|
BPT
1398
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
| $168K | 0.01% |
+8,368
| New | +$169K |
|
1399
PUT
Cummins
CMI
$91.8B
| $168K | 0.01% |
505
-25
| -5% | -$4.28K |
|
1400
Markel Group
MKL
$24.5B
| $168K | 0.01% |
148
+91
| +160% | +$99.5K |
|
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.