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 | |
|---|---|---|---|---|---|---|
1626
Omnicell
OMCL
$1.86B
| $125K | 0.01% |
+2,579
| New | +$130K |
|
1627
Quantum Corp
QMCO
$437M
| $125K | 0.01% |
1,118
-348
| -24% | -$37.4K |
|
1628
PUT
WisdomTree
WT
$2.97B
| $125K | 0.01% |
541
+37
| +7% | +$425 |
|
1629
Churchill Downs
CHDN
$6.03B
| $124K | 0.01% |
+3,204
| New | +$116K |
|
1630
CALL
Mattel
MAT
$4.17B
| $124K | 0.01% |
784
+254
| +48% | +$4.03K |
|
1631
PUT
Radware
RDWR
$1.24B
| $124K | 0.01% |
1,341
-212
| -14% | -$4.02K |
|
1632
CALL
Tenet Healthcare
THC
$20.1B
| $124K | 0.01% |
1,035
-24
| -2% | -$338 |
|
|
GNCMA
1633
DELISTED
GCI Liberty, Inc. Class A-1 Common Stock
GNCMA
| $124K | 0.01% |
3,187
-1,218
| -28% | -$49.7K |
|
1634
PUT
AngloGold Ashanti
AU
$40.3B
| $123K | 0.01% |
1,119
-346
| -24% | -$3.34K |
|
1635
PUT
American Express
AXP
$223B
| $123K | 0.01% |
1,369
-575
| -30% | -$54.8K |
|
1636
Benchmark Electronics
BHE
$2.91B
| $123K | 0.01% |
+4,239
| New | +$132K |
|
1637
Beazer Homes USA
BZH
$907M
| $123K | 0.01% |
+6,452
| New | +$130K |
|
1638
e.l.f. Beauty
ELF
$4.56B
| $123K | 0.01% |
5,525
-16,968
| -75% | -$362K |
|
1639
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $123K | 0.01% |
610
-659
| -52% | -$74.8K |
|
1640
Amplify Cybersecurity ETF
HACK
$2.63B
| $123K | 0.01% |
+3,893
| New | +$120K |
|
1641
NovoCure
NVCR
$2.04B
| $123K | 0.01% |
6,132
+3,533
| +136% | +$68K |
|
|
EMWP
1642
DELISTED
Eros Media World PLC
EMWP
| $123K | 0.01% |
641
+631
| +6,310% | +$155K |
|
|
NSM
1643
CALL
DELISTED
Nationstar Mortgage Holdings
NSM
| $123K | 0.01% |
875
+838
| +2,265% | +$15.3K |
|
|
GG.WS.A
1644
PUT
DELISTED
GOLDCORP INC SERIES A WARRANTS EXP 5/30/2007
GG.WS.A
| $123K | 0.01% |
477
-1,517
| -76% | -$391K |
|
1645
PUT
Carnival Corporation Ltd
CCL
$36.1B
| $122K | 0.01% |
1,539
+119
| +8% | +$7.88K |
|
1646
1-800-Flowers.com
FLWS
$245M
| $122K | 0.01% |
11,446
+10,463
| +1,064% | +$104K |
|
|
PMT
1647
PennyMac Mortgage Investment
PMT
$849M
| $122K | 0.01% |
7,625
+4,522
| +146% | +$73.3K |
|
1648
PUT
Ralph Lauren
RL
$22.2B
| $122K | 0.01% |
933
+546
| +141% | +$50.4K |
|
|
CGI
1649
DELISTED
Celadon Group Inc
CGI
| $122K | 0.01% |
+19,191
| New | +$126K |
|
1650
Globe Life
GL
$13.5B
| $121K | 0.01% |
+1,337
| New | +$115K |
|
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.