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 | |
|---|---|---|---|---|---|---|
3676
Energy Fuels
UUUU
$2.81B
| $414K | ﹤0.01% |
97,370
+20,867
| +27% | +$47K |
|
3677
CALL
Allogene Therapeutics
ALLO
$563M
| $413K | ﹤0.01% |
164
+155
| +1,722% | +$5.05K |
|
3678
Energy Recovery
ERII
$433M
| $413K | ﹤0.01% |
30,292
+17,521
| +137% | +$187K |
|
|
ONIT
3679
CALL
Onity Group
ONIT
$344M
| $413K | ﹤0.01% |
143
+95
| +198% | +$2.4K |
|
3680
CALL
Navigator Holdings
NVGS
$1.34B
| $412K | ﹤0.01% |
377
-269
| -42% | -$2.28K |
|
3681
Atlanta Braves Holdings Series B
BATRK
$3.26B
| $411K | ﹤0.01% |
16,527
+10,265
| +164% | +$242K |
|
3682
CALL
BioCryst Pharmaceuticals
BCRX
$2.44B
| $411K | ﹤0.01% |
553
+493
| +822% | +$2.54K |
|
3683
Inseego
INSG
$111M
| $411K | ﹤0.01% |
+2,661
| New | +$294K |
|
3684
Tandem Diabetes Care
TNDM
$1.23B
| $411K | ﹤0.01% |
+4,298
| New | +$443K |
|
3685
PUT
Telephone and Data Systems
TDS
$3.87B
| $410K | ﹤0.01% |
221
-15
| -6% | -$276 |
|
3686
Trimble
TRMB
$13.5B
| $410K | ﹤0.01% |
6,147
+2,606
| +74% | +$150K |
|
3687
PUT
Conduent
CNDT
$254M
| $409K | ﹤0.01% |
853
+648
| +316% | +$2.71K |
|
|
GPMT
3688
PUT
Granite Point Mortgage Trust
GPMT
$63.3M
| $409K | ﹤0.01% |
410
-75
| -15% | -$638 |
|
|
APTS
3689
PUT
DELISTED
Preferred Apartment Communities, Inc.
APTS
| $409K | ﹤0.01% |
553
+524
| +1,807% | +$3.58K |
|
3690
CALL
Caleres
CAL
$446M
| $408K | ﹤0.01% |
261
+126
| +93% | +$1.41K |
|
3691
CALL
Mohawk Industries
MHK
$7.12B
| $408K | ﹤0.01% |
29
-77
| -73% | -$9.28K |
|
3692
CALL
MannKind Corp
MNKD
$1.2B
| $408K | ﹤0.01% |
1,305
-342
| -21% | -$897 |
|
|
SOL
3693
CALL
DELISTED
Emeren Group
SOL
| $408K | ﹤0.01% |
357
-148
| -29% | -$805 |
|
3694
Trane Technologies
TT
$103B
| $408K | ﹤0.01% |
+2,815
| New | +$389K |
|
|
GAP
3695
The Gap Inc
GAP
$7.3B
| $408K | ﹤0.01% |
20,246
-18,406
| -48% | -$386K |
|
3696
PUT
Arch Capital
ACGL
$37.1B
| $407K | ﹤0.01% |
113
-21
| -16% | -$689 |
|
3697
PUT
Boise Cascade
BCC
$2.84B
| $406K | ﹤0.01% |
85
+48
| +130% | +$2.08K |
|
3698
GrafTech
EAF
$198M
| $406K | ﹤0.01% |
+3,815
| New | +$307K |
|
3699
CALL
Host Hotels & Resorts
HST
$17.1B
| $406K | ﹤0.01% |
278
-890
| -76% | -$11.5K |
|
3700
Ingredion
INGR
$6.45B
| $406K | ﹤0.01% |
5,163
+3,230
| +167% | +$249K |
|
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.