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 | |
|---|---|---|---|---|---|---|
|
STOR
3626
DELISTED
STORE Capital Corporation
STOR
| $428K | ﹤0.01% |
12,620
-11,669
| -48% | -$355K |
|
3627
CALL
Snap-on
SNA
$21.6B
| $427K | ﹤0.01% |
25
+1
| +4% | +$167 |
|
3628
PUT
STAAR Surgical
STAA
$1.11B
| $427K | ﹤0.01% |
54
-27
| -33% | -$1.98K |
|
3629
Clearfield
CLFD
$417M
| $426K | ﹤0.01% |
17,242
-4,375
| -20% | -$102K |
|
3630
PUT
Fidelity National Financial
FNF
$14.4B
| $426K | ﹤0.01% |
113
-250
| -69% | -$8.44K |
|
|
AHRT
3631
PUT
AH Realty Trust
AHRT
$541M
| $425K | ﹤0.01% |
379
-202
| -35% | -$2.04K |
|
3632
Orthofix Medical
OFIX
$500M
| $425K | ﹤0.01% |
9,896
+3,621
| +58% | +$132K |
|
3633
PUT
Essential Utilities
WTRG
$11.5B
| $425K | ﹤0.01% |
90
+55
| +157% | +$2.44K |
|
3634
Coeur Mining
CDE
$15.6B
| $424K | ﹤0.01% |
41,000
-85,104
| -67% | -$699K |
|
3635
Immersion
IMMR
$258M
| $424K | ﹤0.01% |
37,598
+37,450
| +25,304% | +$297K |
|
|
SRG
3636
Seritage Growth Properties
SRG
$130M
| $424K | ﹤0.01% |
28,903
+11,300
| +64% | +$167K |
|
3637
PUT
Ambev
ABEV
$48.7B
| $423K | ﹤0.01% |
1,383
-332
| -19% | -$895 |
|
3638
PUT
Commercial Metals
CMC
$7.84B
| $423K | ﹤0.01% |
206
+177
| +610% | +$3.67K |
|
3639
CALL
OneMain Financial
OMF
$7.16B
| $423K | ﹤0.01% |
88
-7
| -7% | -$276 |
|
3640
CALL
Sabra Healthcare REIT
SBRA
$5.62B
| $423K | ﹤0.01% |
244
+43
| +21% | +$686 |
|
|
HA
3641
PUT
DELISTED
Hawaiian Holdings, Inc.
HA
| $423K | ﹤0.01% |
239
+158
| +195% | +$2.67K |
|
|
AVYA
3642
CALL
DELISTED
Avaya Holdings Corp. Common Stock
AVYA
| $423K | ﹤0.01% |
221
-75
| -25% | -$1.39K |
|
|
BGFV
3643
CALL
DELISTED
Big 5 Sporting Goods
BGFV
| $422K | ﹤0.01% |
414
-52
| -11% | -$461 |
|
3644
CALL
Monarch Casino & Resort
MCRI
$2.22B
| $422K | ﹤0.01% |
69
+68
| +6,800% | +$3.42K |
|
3645
PUT
PBF Energy
PBF
$7.13B
| $422K | ﹤0.01% |
595
-297
| -33% | -$1.94K |
|
|
GPUS
3646
Hyperscale Data Inc
GPUS
$54.9M
| $422K | ﹤0.01% |
+1
| New | +$476K |
|
|
RP
3647
DELISTED
RealPage, Inc.
RP
| $422K | ﹤0.01% |
4,840
-7,430
| -61% | -$487K |
|
|
ALLK
3648
CALL
DELISTED
Allakos
ALLK
| $420K | ﹤0.01% |
+30
| New | +$3.12K |
|
3649
CALL
Anika Therapeutics
ANIK
$204M
| $420K | ﹤0.01% |
93
-408
| -81% | -$15.5K |
|
3650
CALL
CareDx
CDNA
$1.86B
| $420K | ﹤0.01% |
58
-17
| -23% | -$985 |
|
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.