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 | |
|---|---|---|---|---|---|---|
1526
PUT
MKS Inc
MKSI
$22.2B
| $2.54M | ﹤0.01% |
169
+146
| +635% | +$19.1K |
|
1527
CALL
Digital Realty Trust
DLR
$73.7B
| $2.54M | ﹤0.01% |
182
-55
| -23% | -$7.87K |
|
1528
PUT
Albertsons Companies
ACI
$5.4B
| $2.54M | ﹤0.01% |
1,442
+264
| +22% | +$4K |
|
|
CIIC
1529
CALL
DELISTED
CIIG Merger Corp. - Class A Common Stock
CIIC
| $2.53M | ﹤0.01% |
+901
| New | +$16.3K |
|
1530
PUT
Ally Financial
ALLY
$13.1B
| $2.53M | ﹤0.01% |
710
-731
| -51% | -$22.1K |
|
1531
CALL
AllianceBernstein
AB
$3.47B
| $2.53M | ﹤0.01% |
749
+428
| +133% | +$13.5K |
|
1532
PUT
Tencent Music
TME
$14.5B
| $2.53M | ﹤0.01% |
1,314
+767
| +140% | +$12.5K |
|
1533
PUT
Arcturus Therapeutics
ARCT
$157M
| $2.52M | ﹤0.01% |
582
+473
| +434% | +$32K |
|
|
GBT
1534
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $2.52M | ﹤0.01% |
+58,260
| New | +$2.87M |
|
|
PFPT
1535
CALL
DELISTED
Proofpoint, Inc.
PFPT
| $2.52M | ﹤0.01% |
185
+139
| +302% | +$15.2K |
|
|
HUYA
1536
CALL
Huya Inc
HUYA
$542M
| $2.52M | ﹤0.01% |
+1,265
| New | +$27.1K |
|
1537
CALL
Sibanye-Stillwater
SBSW
$5.92B
| $2.52M | ﹤0.01% |
1,586
+695
| +78% | +$9.35K |
|
1538
Cboe Global Markets
CBOE
$29.8B
| $2.52M | ﹤0.01% |
+27,056
| New | +$2.37M |
|
1539
Fiverr
FVRR
$376M
| $2.52M | ﹤0.01% |
12,904
+10,701
| +486% | +$1.94M |
|
1540
CALL
AerCap
AER
$23.9B
| $2.5M | ﹤0.01% |
549
-283
| -34% | -$9.88K |
|
1541
CALL
Booz Allen Hamilton
BAH
$8.7B
| $2.5M | ﹤0.01% |
287
+206
| +254% | +$17.5K |
|
|
ABB
1542
PUT
DELISTED
ABB Ltd
ABB
| $2.5M | ﹤0.01% |
894
+187
| +26% | +$4.99K |
|
|
RDS.B
1543
DELISTED
Royal Dutch Shell PLC ADS Class B
RDS.B
| $2.49M | ﹤0.01% |
74,223
+34,583
| +87% | +$1.03M |
|
1544
PUT
iShares Gold Trust
IAU
$63B
| $2.49M | ﹤0.01% |
688
+413
| +150% | +$14.8K |
|
|
CALY
1545
PUT
Callaway Golf Company
CALY
$3.26B
| $2.49M | ﹤0.01% |
1,036
+200
| +24% | +$4.08K |
|
1546
CALL
Energy Transfer Partners
ET
$70.1B
| $2.49M | ﹤0.01% |
4,023
-769
| -16% | -$4.65K |
|
1547
PUT
Vistra
VST
$55.1B
| $2.48M | ﹤0.01% |
1,264
+902
| +249% | +$16.8K |
|
1548
PUT
Corsair Gaming
CRSR
$1.05B
| $2.48M | ﹤0.01% |
+686
| New | +$20.9K |
|
1549
Plug Power
PLUG
$2.92B
| $2.48M | ﹤0.01% |
73,262
-32,624
| -31% | -$739K |
|
|
PING
1550
PUT
DELISTED
Ping Identity Holding Corp.
PING
| $2.48M | ﹤0.01% |
867
+813
| +1,506% | +$22.5K |
|
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.