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 | |
|---|---|---|---|---|---|---|
2826
CALL
Acuity Brands
AYI
$9.88B
| $33K | ﹤0.01% |
29
-159
| -85% | -$26.5K |
|
2827
CALL
Century Aluminum
CENX
$4.57B
| $33K | ﹤0.01% |
139
-58
| -29% | -$888 |
|
2828
CMS Energy
CMS
$23.1B
| $33K | ﹤0.01% |
712
-38
| -5% | -$1.84K |
|
2829
CryoPort
CYRX
$775M
| $33K | ﹤0.01% |
+3,924
| New | +$30.8K |
|
2830
CALL
Fossil Group
FOSL
$239M
| $33K | ﹤0.01% |
301
-36
| -11% | -$279 |
|
2831
Mercer International
MERC
$44.9M
| $33K | ﹤0.01% |
2,320
+1,303
| +128% | +$17.9K |
|
2832
PUT
Pacira BioSciences
PCRX
$1.02B
| $33K | ﹤0.01% |
187
+153
| +450% | +$6.06K |
|
2833
PUT
Q2 Holdings
QTWO
$3.42B
| $33K | ﹤0.01% |
398
+263
| +195% | +$10.8K |
|
2834
QuickLogic
QUIK
$224M
| $33K | ﹤0.01% |
1,377
+667
| +94% | +$15K |
|
|
SAND
2835
PUT
DELISTED
Sandstorm Gold
SAND
| $33K | ﹤0.01% |
257
+16
| +7% | +$73 |
|
2836
Teucrium Soybean Fund
SOYB
$57.2M
| $33K | ﹤0.01% |
1,859
+230
| +14% | +$4.23K |
|
2837
PUT
Stellantis
STLA
$16.5B
| $33K | ﹤0.01% |
1,087
+288
| +36% | +$5.07K |
|
2838
CALL
Molson Coors Class B
TAP
$7.68B
| $33K | ﹤0.01% |
234
-191
| -45% | -$15.4K |
|
|
TVRD
2839
CALL
Tvardi Therapeutics
TVRD
$23.5M
| $33K | ﹤0.01% |
11
-2
| -15% | -$912 |
|
|
PBFX
2840
DELISTED
PBF LOGISTICS LP
PBFX
| $33K | ﹤0.01% |
1,603
+1,230
| +330% | +$24.7K |
|
|
BPL
2841
PUT
DELISTED
Buckeye Partners, L.P.
BPL
| $33K | ﹤0.01% |
93
+19
| +26% | +$965 |
|
|
CTRL
2842
CALL
DELISTED
Control4 Corporation
CTRL
| $33K | ﹤0.01% |
117
-120
| -51% | -$3.72K |
|
|
EGN
2843
CALL
DELISTED
Energen
EGN
| $33K | ﹤0.01% |
150
-153
| -50% | -$8.31K |
|
|
ETP
2844
CALL
DELISTED
Energy Transfer Partners, L.P.
ETP
| $33K | ﹤0.01% |
890
+438
| +97% | +$7.56K |
|
|
CIT
2845
PUT
DELISTED
CIT Group Inc.
CIT
| $33K | ﹤0.01% |
521
+256
| +97% | +$12.4K |
|
2846
CALL
InfraCap MLP ETF
AMZA
$471M
| $32K | ﹤0.01% |
10
+6
| +150% | +$505 |
|
2847
CALL
Babcock & Wilcox
BW
$1.43B
| $32K | ﹤0.01% |
22
+12
| +120% | +$544 |
|
|
CVGW
2848
CALL
DELISTED
Calavo Growers
CVGW
| $32K | ﹤0.01% |
48
+35
| +269% | +$2.58K |
|
2849
CALL
CoreCivic
CXW
$3.1B
| $32K | ﹤0.01% |
435
+122
| +39% | +$2.93K |
|
2850
CALL
DTE Energy
DTE
$31.1B
| $32K | ﹤0.01% |
307
+113
| +58% | +$10.7K |
|
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.