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 | |
|---|---|---|---|---|---|---|
3376
Match Group
MTCH
$8.55B
| $518K | ﹤0.01% |
3,430
-72,313
| -95% | -$9.56M |
|
3377
Repligen
RGEN
$9.25B
| $518K | ﹤0.01% |
2,707
+2,080
| +332% | +$378K |
|
3378
PUT
United Microelectronic
UMC
$46.9B
| $518K | ﹤0.01% |
615
+593
| +2,695% | +$3.87K |
|
|
CKH
3379
CALL
DELISTED
Seacor Holdings Inc.
CKH
| $518K | ﹤0.01% |
125
+122
| +4,067% | +$4.28K |
|
3380
PUT
Abercrombie & Fitch
ANF
$5B
| $517K | ﹤0.01% |
254
-345
| -58% | -$6.33K |
|
|
MILE
3381
CALL
DELISTED
Metromile, Inc. Common Stock
MILE
| $517K | ﹤0.01% |
+333
| New | +$4.47K |
|
|
REGI
3382
CALL
DELISTED
Renewable Energy Group, Inc.
REGI
| $516K | ﹤0.01% |
73
-52
| -42% | -$3.18K |
|
3383
PUT
Antero Midstream
AM
$10.1B
| $515K | ﹤0.01% |
669
-19
| -3% | -$129 |
|
|
NOAH
3384
Noah Holdings
NOAH
$603M
| $515K | ﹤0.01% |
+10,782
| New | +$348K |
|
3385
CALL
AquaBounty Technologies
AQB
$6.02M
| $514K | ﹤0.01% |
+29
| New | +$3.23K |
|
3386
PUT
Energizer
ENR
$1.55B
| $514K | ﹤0.01% |
122
+30
| +33% | +$1.27K |
|
3387
CALL
JELD-WEN Holding
JELD
$164M
| $514K | ﹤0.01% |
203
+157
| +341% | +$3.76K |
|
3388
CALL
Trimble
TRMB
$13.9B
| $514K | ﹤0.01% |
77
-24
| -24% | -$1.38K |
|
3389
Petrobras
PBR
$116B
| $513K | ﹤0.01% |
45,738
-135,525
| -75% | -$1.2M |
|
3390
CALL
Red Robin
RRGB
$152M
| $513K | ﹤0.01% |
267
+9
| +3% | +$151 |
|
|
SA
3391
Seabridge Gold
SA
$3.35B
| $513K | ﹤0.01% |
24,388
+10,241
| +72% | +$198K |
|
3392
SoFi Technologies
SOFI
$23.7B
| $513K | ﹤0.01% |
+41,299
| New | +$466K |
|
|
BLD
3393
DELISTED
TopBuild
BLD
| $512K | ﹤0.01% |
2,784
+2,274
| +446% | +$402K |
|
3394
Cameco
CCJ
$42.4B
| $511K | ﹤0.01% |
38,198
-33,981
| -47% | -$363K |
|
3395
PUT
NovaGold Resources
NG
$3.33B
| $510K | ﹤0.01% |
528
-326
| -38% | -$3.44K |
|
3396
CALL
Old Republic International
ORI
$10.4B
| $510K | ﹤0.01% |
259
-133
| -34% | -$2.34K |
|
3397
CALL
Gibraltar Industries
ROCK
$1.49B
| $510K | ﹤0.01% |
71
+3
| +4% | +$200 |
|
|
THS
3398
CALL
DELISTED
Treehouse Foods
THS
| $509K | ﹤0.01% |
120
+12
| +11% | +$488 |
|
3399
PUT
Viking Therapeutics
VKTX
$4B
| $509K | ﹤0.01% |
905
-7
| -0.8% | -$42 |
|
|
NATI
3400
CALL
DELISTED
National Instruments Corp
NATI
| $509K | ﹤0.01% |
116
+29
| +33% | +$1.08K |
|
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, 3,401 increased, 3,105 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.