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 |
Alibaba
BABA
|
+$39.9M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$39M |
| 3 |
Mastercard
MA
|
+$31.3M |
| 4 |
Apple
AAPL
|
+$25.3M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$25.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
JPMorgan Chase
JPM
|
+$52.8M |
| 2 |
TSMC
TSM
|
+$43M |
| 3 |
Amazon
AMZN
|
+$24.7M |
| 4 |
iShares Silver Trust
SLV
|
+$24.2M |
| 5 |
Netflix
NFLX
|
+$21.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.65% |
| 2 | Technology | 0.37% |
| 3 | Healthcare | 0.33% |
| 4 | Industrials | 0.21% |
| 5 | Communication Services | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
PDCE
2901
PUT
DELISTED
PDC Energy, Inc.
PDCE
| $761K | ﹤0.01% |
371
-18
| -5% | -$281 |
|
2902
CALL
Element Solutions
ESI
$9.12B
| $760K | ﹤0.01% |
429
+206
| +92% | +$2.85K |
|
2903
Automatic Data Processing
ADP
$100B
| $759K | ﹤0.01% |
+4,311
| New | +$708K |
|
2904
PUT
Essex Property Trust
ESS
$18.9B
| $759K | ﹤0.01% |
32
-18
| -36% | -$4.15K |
|
2905
CALL
St. Joe Company
JOE
$3.57B
| $759K | ﹤0.01% |
179
+109
| +156% | +$3.47K |
|
2906
PUT
Cullen/Frost Bankers
CFR
$10.3B
| $758K | ﹤0.01% |
87
+6
| +7% | +$472 |
|
2907
Microvision
MVIS
$88.2M
| $758K | ﹤0.01% |
+141,006
| New | +$415K |
|
2908
PUT
Kennametal
KMT
$2.68B
| $757K | ﹤0.01% |
209
+10
| +5% | +$344 |
|
2909
PUT
Cenovus Energy
CVE
$54.6B
| $756K | ﹤0.01% |
1,253
+579
| +86% | +$2.7K |
|
|
ITCI
2910
PUT
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $756K | ﹤0.01% |
238
-326
| -58% | -$8.57K |
|
2911
CALL
Curis
CRIS
$9.53M
| $755K | ﹤0.01% |
2
+1
| +100% | +$1.2K |
|
2912
CALL
Viatris
VTRS
$20.1B
| $755K | ﹤0.01% |
403
-1,257
| -76% | -$20.5K |
|
2913
PUT
Brunswick
BC
$5.19B
| $754K | ﹤0.01% |
99
+44
| +80% | +$3.1K |
|
2914
CALL
Vanguard ESG US Corporate Bond ETF
VCEB
$1.18B
| $753K | ﹤0.01% |
38
+23
| +153% | +$1.73K |
|
2915
PUT
OR Royalties Inc
OR
$5.47B
| $751K | ﹤0.01% |
593
+436
| +278% | +$5.09K |
|
2916
CALL
Pampa Energía
PAM
$4.64B
| $751K | ﹤0.01% |
545
+61
| +13% | +$783 |
|
|
GRA
2917
PUT
DELISTED
W.R. Grace & Co.
GRA
| $751K | ﹤0.01% |
137
+102
| +291% | +$5.13K |
|
2918
Blackbaud
BLKB
$1.5B
| $750K | ﹤0.01% |
+13,044
| New | +$726K |
|
2919
PUT
Owens Corning
OC
$11.5B
| $750K | ﹤0.01% |
99
-69
| -41% | -$5.03K |
|
2920
PUT
Tenet Healthcare
THC
$20.1B
| $750K | ﹤0.01% |
188
-503
| -73% | -$16.2K |
|
|
KRA
2921
PUT
DELISTED
Kraton Corporation
KRA
| $750K | ﹤0.01% |
270
+208
| +335% | +$5.62K |
|
|
ONC
2922
PUT
BeOne Medicines Ltd
ONC
$33.8B
| $749K | ﹤0.01% |
+29
| New | +$7.98K |
|
2923
CALL
MaxLinear
MXL
$6.49B
| $748K | ﹤0.01% |
196
+145
| +284% | +$4.21K |
|
|
SOLO
2924
CALL
DELISTED
Electrameccanica Vehicles Corp. Ltd.
SOLO
| $748K | ﹤0.01% |
1,209
+991
| +455% | +$5.14K |
|
2925
CALL
SLM Corp
SLM
$4.57B
| $747K | ﹤0.01% |
603
+370
| +159% | +$3.89K |
|
Similar funds
Simplex Trading's Q4 2020 Portfolio in Review
As of Q4 2020, Simplex Trading held 9,568 positions worth $77.2B, up 5% from $73.5B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading's Q4 2020 filing shows 1,711 new, 3,402 increased, 3,106 reduced and 1,157 closed positions. Its largest new stake was Alibaba: 143,630 shares worth $33.4M. The largest sale was JPMorgan Chase, an estimated $52.8M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.65% of assets, up from 0.53% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q4 2020 buy was Alibaba: 143,630 shares worth $33.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q4 2020, an estimated $39M increase.
- Simplex Trading's biggest Q4 2020 reduction was JPMorgan Chase, cutting an estimated $52.8M.
- Simplex Trading fully exited Target in Q4 2020, selling an estimated $14.3M.
- Simplex Trading's ten largest holdings make up 42% of its $77.2B portfolio in Q4 2020.
- Simplex Trading opened 1,711 new positions and closed 1,157 in Q4 2020.
- Simplex Trading's portfolio value rose 5% quarter-over-quarter to $77.2B.
Based on Simplex Trading's 13F filing for Q4 2020, filed 2 Feb 2021.