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 | |
|---|---|---|---|---|---|---|
2876
Bank of Hawaii
BOH
$3.33B
| $31K | ﹤0.01% |
371
+340
| +1,097% | +$28.3K |
|
2877
Compañía de Minas Buenaventura
BVN
$7.85B
| $31K | ﹤0.01% |
+2,223
| New | +$30.8K |
|
2878
PUT
Carlyle Group
CG
$16.3B
| $31K | ﹤0.01% |
352
+297
| +540% | +$6.64K |
|
|
CMA
2879
PUT
DELISTED
Comerica
CMA
| $31K | ﹤0.01% |
148
+74
| +100% | +$5.96K |
|
2880
PUT
Cencora
COR
$60.3B
| $31K | ﹤0.01% |
775
+694
| +857% | +$57.4K |
|
|
CTLP
2881
CALL
DELISTED
Cantaloupe
CTLP
| $31K | ﹤0.01% |
89
-94
| -51% | -$721 |
|
2882
PUT
DHT Holdings
DHT
$2.97B
| $31K | ﹤0.01% |
682
-204
| -23% | -$790 |
|
2883
PUT
DHI Group
DHX
$166M
| $31K | ﹤0.01% |
460
-50
| -10% | -$104 |
|
2884
PUT
Energy Transfer Partners
ET
$70.1B
| $31K | ﹤0.01% |
260
+128
| +97% | +$2.18K |
|
2885
Gartner
IT
$9.41B
| $31K | ﹤0.01% |
+255
| New | +$31K |
|
|
K
2886
CALL
DELISTED
Kellanova
K
| $31K | ﹤0.01% |
207
-291
| -58% | -$17.5K |
|
2887
CALL
Koppers
KOP
$966M
| $31K | ﹤0.01% |
59
+6
| +11% | +$292 |
|
2888
CALL
LKQ Corp
LKQ
$6.58B
| $31K | ﹤0.01% |
86
+67
| +353% | +$2.56K |
|
|
OBE
2889
PUT
Obsidian Energy
OBE
$707M
| $31K | ﹤0.01% |
12
-45
| -79% | -$364 |
|
2890
CALL
Ollie's Bargain Outlet
OLLI
$4.01B
| $31K | ﹤0.01% |
61
-355
| -85% | -$16.7K |
|
2891
CALL
OSI Systems
OSIS
$3.57B
| $31K | ﹤0.01% |
228
-31
| -12% | -$2.6K |
|
2892
PUT
Post Holdings
POST
$4.12B
| $31K | ﹤0.01% |
371
+220
| +146% | +$11.7K |
|
2893
CALL
Pilgrim's Pride
PPC
$6.82B
| $31K | ﹤0.01% |
171
+79
| +86% | +$2.58K |
|
2894
CALL
PRA Group
PRAA
$648M
| $31K | ﹤0.01% |
200
+117
| +141% | +$3.71K |
|
2895
Qiagen
QGEN
$8.53B
| $31K | ﹤0.01% |
+954
| New | +$32.9K |
|
2896
CALL
Ferrari
RACE
$63.3B
| $31K | ﹤0.01% |
220
-254
| -54% | -$28.2K |
|
2897
CALL
Southern Company
SO
$110B
| $31K | ﹤0.01% |
635
-169
| -21% | -$8.61K |
|
2898
CALL
SPX Corp
SPXC
$11B
| $31K | ﹤0.01% |
+174
| New | +$5.28K |
|
2899
STAG Industrial
STAG
$7.86B
| $31K | ﹤0.01% |
+1,146
| New | +$32K |
|
2900
CALL
Xerox
XRX
$337M
| $31K | ﹤0.01% |
245
-168
| -41% | -$5.1K |
|
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.