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 | |
|---|---|---|---|---|---|---|
2551
PUT
Voya Financial
VOYA
$8.94B
| $1.01M | ﹤0.01% |
172
-241
| -58% | -$13.1K |
|
|
ISEE
2552
CALL
DELISTED
IVERIC bio, Inc. Common Stock
ISEE
| $1.01M | ﹤0.01% |
1,464
+484
| +49% | +$3.1K |
|
|
MDLA
2553
CALL
DELISTED
Medallia, Inc.
MDLA
| $1.01M | ﹤0.01% |
304
+28
| +10% | +$893 |
|
2554
CALL
Gildan
GIL
$9.25B
| $1.01M | ﹤0.01% |
360
+78
| +28% | +$1.92K |
|
|
TSE
2555
CALL
DELISTED
Trinseo
TSE
| $1.01M | ﹤0.01% |
197
+130
| +194% | +$4.96K |
|
|
IPOF
2556
CALL
DELISTED
Social Capital Hedosophia Holdings Corp. VI
IPOF
| $1.01M | ﹤0.01% |
+820
| New | +$9.32K |
|
|
NBIS
2557
Nebius Group N.V.
NBIS
$47.7B
| $1.01M | ﹤0.01% |
+14,483
| New | +$925K |
|
|
DM
2558
DELISTED
Desktop Metal, Inc.
DM
| $1.01M | ﹤0.01% |
5,854
+1,099
| +23% | +$145K |
|
2559
Lithia Motors
LAD
$7.78B
| $1M | ﹤0.01% |
+3,432
| New | +$939K |
|
|
ADAM
2560
Adamas Trust
ADAM
$777M
| $1M | ﹤0.01% |
68,048
-73,965
| -52% | -$936K |
|
2561
BILL Holdings
BILL
$4.33B
| $1M | ﹤0.01% |
7,352
-3,464
| -32% | -$408K |
|
2562
CALL
Builders FirstSource
BLDR
$7.84B
| $1M | ﹤0.01% |
246
-85
| -26% | -$3.01K |
|
2563
First Trust NASDAQ Cybersecurity ETF
CIBR
$13.8B
| $1M | ﹤0.01% |
+22,616
| New | +$863K |
|
2564
CALL
Sensata Technologies
ST
$6.65B
| $1M | ﹤0.01% |
190
-122
| -39% | -$5.86K |
|
2565
PUT
ManpowerGroup
MAN
$2.39B
| $1M | ﹤0.01% |
111
+109
| +5,450% | +$8.96K |
|
2566
Reliance Steel & Aluminium
RS
$20.8B
| $999K | ﹤0.01% |
8,346
+7,992
| +2,258% | +$924K |
|
2567
PUT
Teradata
TDC
$2.68B
| $999K | ﹤0.01% |
445
+46
| +12% | +$987 |
|
2568
Affiliated Managers Group
AMG
$9.46B
| $996K | ﹤0.01% |
+9,794
| New | +$846K |
|
2569
CALL
8x8 Inc
EGHT
$247M
| $996K | ﹤0.01% |
289
-22
| -7% | -$472 |
|
2570
PUT
Cerence
CRNC
$382M
| $994K | ﹤0.01% |
99
-113
| -53% | -$8.43K |
|
2571
CALL
Crane NXT
CXT
$3.04B
| $994K | ﹤0.01% |
369
+29
| +9% | +$639 |
|
|
VNE
2572
PUT
DELISTED
Veoneer, Inc.
VNE
| $994K | ﹤0.01% |
467
+357
| +325% | +$6.76K |
|
2573
PUT
B&G Foods
BGS
$285M
| $992K | ﹤0.01% |
358
-113
| -24% | -$3.19K |
|
2574
CALL
Popular Inc
BPOP
$11B
| $991K | ﹤0.01% |
176
-186
| -51% | -$8.83K |
|
2575
Omeros
OMER
$709M
| $991K | ﹤0.01% |
69,413
+23,179
| +50% | +$283K |
|
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.