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 | |
|---|---|---|---|---|---|---|
751
SM Energy
SM
$8.09B
| $460K | 0.02% |
20,836
-9,593
| -32% | -$194K |
|
752
PUT
Costco
COST
$408B
| $458K | 0.02% |
3,723
-784
| -17% | -$135K |
|
|
EXAS
753
DELISTED
Exact Sciences
EXAS
| $458K | 0.02% |
8,724
+4,201
| +93% | +$224K |
|
754
Avery Dennison
AVY
$12B
| $456K | 0.02% |
+3,977
| New | +$430K |
|
755
Carlyle Group
CG
$15.9B
| $455K | 0.02% |
19,870
+9,720
| +96% | +$217K |
|
756
Newmont
NEM
$100B
| $454K | 0.02% |
12,119
+11,814
| +3,873% | +$434K |
|
757
InterDigital
IDCC
$6.65B
| $453K | 0.02% |
5,961
-3,039
| -34% | -$227K |
|
758
CALL
Ally Financial
ALLY
$13.3B
| $452K | 0.02% |
701
-57
| -8% | -$1.51K |
|
|
TSRO
759
DELISTED
TESARO, Inc.
TSRO
| $452K | 0.02% |
5,465
-2,034
| -27% | -$199K |
|
760
Hyatt Hotels
H
$17.4B
| $450K | 0.02% |
6,129
+1,918
| +46% | +$130K |
|
|
CNSL
761
DELISTED
Consolidated Communications Holdings, Inc.
CNSL
| $450K | 0.02% |
36,988
+36,056
| +3,869% | +$566K |
|
762
iShares MSCI EAFE Min Vol Factor ETF
EFAV
$5.18B
| $449K | 0.02% |
+6,155
| New | +$443K |
|
763
PUT
Philip Morris
PM
$301B
| $449K | 0.02% |
3,093
+982
| +47% | +$105K |
|
|
CRC
764
CALL
DELISTED
California Resources Corporation
CRC
| $449K | 0.02% |
609
+446
| +274% | +$6.26K |
|
765
Ashland
ASH
$3.13B
| $448K | 0.02% |
6,301
+3,928
| +166% | +$271K |
|
766
CALL
PNC Financial Services
PNC
$99.4B
| $448K | 0.02% |
475
-204
| -30% | -$28.2K |
|
767
PUT
Albemarle
ALB
$14B
| $446K | 0.02% |
774
+383
| +98% | +$51.9K |
|
|
JBGS
768
JBG SMITH
JBGS
$839M
| $444K | 0.02% |
12,806
+6,148
| +92% | +$203K |
|
769
PUT
GoPro
GPRO
$125M
| $442K | 0.02% |
1,137
+500
| +78% | +$4.43K |
|
|
HES
770
CALL
DELISTED
Hess
HES
| $441K | 0.02% |
1,535
-284
| -16% | -$12.8K |
|
771
Bath & Body Works
BBWI
$3.98B
| $440K | 0.02% |
9,041
-7,205
| -44% | -$291K |
|
|
TRVG
772
trivago
TRVG
$379M
| $440K | 0.02% |
12,876
+11,987
| +1,348% | +$491K |
|
773
CALL
AB InBev
BUD
$156B
| $439K | 0.02% |
1,300
-359
| -22% | -$42.2K |
|
|
B
774
PUT
Barrick Mining
B
$61.8B
| $439K | 0.02% |
848
-1,992
| -70% | -$29.4K |
|
775
State Street SPDR Bloomberg High Yield Bond ETF
JNK
$7.25B
| $439K | 0.02% |
+3,990
| New | +$442K |
|
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.