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 | |
|---|---|---|---|---|---|---|
2526
PUT
United Therapeutics
UTHR
$26.3B
| $1.03M | ﹤0.01% |
+68
| New | +$8.92K |
|
2527
CALL
Wabtec
WAB
$51.1B
| $1.03M | ﹤0.01% |
141
-38
| -21% | -$2.6K |
|
2528
PUT
East-West Bancorp
EWBC
$17.9B
| $1.03M | ﹤0.01% |
203
+82
| +68% | +$3.48K |
|
2529
PUT
IPG Photonics
IPGP
$3.89B
| $1.03M | ﹤0.01% |
46
-6
| -12% | -$1.2K |
|
2530
CALL
Vuzix
VUZI
$190M
| $1.03M | ﹤0.01% |
1,134
+265
| +30% | +$1.32K |
|
2531
PUT
PTC
PTC
$13.7B
| $1.03M | ﹤0.01% |
86
+3
| +4% | +$298 |
|
2532
CALL
MarketAxess Holdings
MKTX
$4.15B
| $1.03M | ﹤0.01% |
18
-22
| -55% | -$12K |
|
|
SAND
2533
CALL
DELISTED
Sandstorm Gold
SAND
| $1.03M | ﹤0.01% |
1,431
+651
| +83% | +$5.03K |
|
2534
PUT
ZTO Express
ZTO
$18.2B
| $1.03M | ﹤0.01% |
352
-26
| -7% | -$764 |
|
2535
CALL
RPM International
RPM
$13.7B
| $1.02M | ﹤0.01% |
113
-158
| -58% | -$13.9K |
|
|
TWO
2536
CALL
Two Harbors Investment
TWO
$1.27B
| $1.02M | ﹤0.01% |
402
+256
| +175% | +$6.08K |
|
2537
CryoPort
CYRX
$775M
| $1.02M | ﹤0.01% |
23,287
+23,252
| +66,434% | +$1.11M |
|
2538
PUT
CoreCivic
CXW
$3.1B
| $1.02M | ﹤0.01% |
1,555
+613
| +65% | +$4.41K |
|
|
DISCK
2539
PUT
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $1.02M | ﹤0.01% |
342
-389
| -53% | -$8.52K |
|
2540
PUT
Trupanion
TRUP
$1.05B
| $1.02M | ﹤0.01% |
85
-86
| -50% | -$8.12K |
|
2541
CALL
AMN Healthcare
AMN
$1.28B
| $1.02M | ﹤0.01% |
149
-28
| -16% | -$1.82K |
|
2542
CALL
Iovance Biotherapeutics
IOVA
$2.23B
| $1.02M | ﹤0.01% |
219
+4
| +2% | +$159 |
|
|
JAMF
2543
DELISTED
Jamf
JAMF
| $1.02M | ﹤0.01% |
33,982
+26,072
| +330% | +$860K |
|
|
BKI
2544
CALL
DELISTED
Black Knight, Inc. Common Stock
BKI
| $1.02M | ﹤0.01% |
115
+35
| +44% | +$3.18K |
|
2545
PUT
Merit Medical Systems
MMSI
$4.43B
| $1.01M | ﹤0.01% |
183
+99
| +118% | +$5.11K |
|
2546
PUT
Euronet Worldwide
EEFT
$3.02B
| $1.01M | ﹤0.01% |
70
+20
| +40% | +$2.33K |
|
2547
CALL
Alto Ingredients
ALTO
$360M
| $1.01M | ﹤0.01% |
1,866
+500
| +37% | +$3.47K |
|
2548
PUT
ING
ING
$93.8B
| $1.01M | ﹤0.01% |
1,074
-549
| -34% | -$4.71K |
|
2549
KKR & Co
KKR
$89.2B
| $1.01M | ﹤0.01% |
25,017
+2,412
| +11% | +$91.1K |
|
|
WBT
2550
CALL
DELISTED
Welbilt, Inc.
WBT
| $1.01M | ﹤0.01% |
767
+331
| +76% | +$2.97K |
|
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.