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 | Miscellaneous | 97.69% |
| 2 | Consumer Discretionary | 0.65% |
| 3 | Technology | 0.38% |
| 4 | Healthcare | 0.33% |
| 5 | Industrials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
NBIS
751
PUT
Nebius Group N.V.
NBIS
$61.5B
| $7.14M | 0.01% |
1,026
-334
| -25% | -$21.3K |
|
752
CALL
Ambarella
AMBA
$2.78B
| $7.13M | 0.01% |
776
+485
| +167% | +$34K |
|
753
Palo Alto Networks
PANW
$272B
| $7.12M | 0.01% |
120,240
-1,068
| -0.9% | -$49.9K |
|
754
PUT
Progressive
PGR
$127B
| $7.11M | 0.01% |
719
+128
| +22% | +$12.1K |
|
|
PPLC
755
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $7.08M | 0.01% |
1,157
-59
| -5% | -$361K |
|
756
PUT
C3.ai
AI
$1.67B
| $7.08M | 0.01% |
+510
| New | +$68.4K |
|
757
PUT
GoodRx Holdings
GDRX
$1.19B
| $7.07M | 0.01% |
1,753
+1,702
| +3,337% | +$78.2K |
|
758
CALL
Mondelez International
MDLZ
$78.2B
| $7.05M | 0.01% |
1,206
-337
| -22% | -$19.3K |
|
759
CALL
Deere & Co
DE
$187B
| $7.05M | 0.01% |
262
-1,160
| -82% | -$288K |
|
760
CALL
Albemarle
ALB
$14.9B
| $7.04M | 0.01% |
477
+79
| +20% | +$9.38K |
|
761
PUT
TripAdvisor
TRIP
$1.09B
| $7.02M | 0.01% |
2,438
-878
| -26% | -$21.1K |
|
|
762
CALL
TripAdvisor
TRIP
$1.09B
| $7.01M | 0.01% |
2,435
+1,684
| +224% | +$40.5K |
|
763
CALL
Invesco
IVZ
$14.6B
| $7M | 0.01% |
4,016
+3,705
| +1,191% | +$57K |
|
764
PUT
Vornado Realty Trust
VNO
$6.83B
| $6.99M | 0.01% |
1,872
+594
| +46% | +$21.7K |
|
765
CALL
Editas Medicine
EDIT
$496M
| $6.99M | 0.01% |
997
+339
| +52% | +$13.9K |
|
|
MRTX
766
CALL
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $6.98M | 0.01% |
318
+210
| +194% | +$45.4K |
|
767
PUT
Agnico Eagle Mines
AEM
$104B
| $6.97M | 0.01% |
989
-79
| -7% | -$5.89K |
|
768
PUT
Advance Auto Parts
AAP
$2.67B
| $6.96M | 0.01% |
442
-4
| -0.9% | -$617 |
|
|
RDFN
769
CALL
DELISTED
Redfin
RDFN
| $6.95M | 0.01% |
1,013
+248
| +32% | +$13.3K |
|
770
PUT
ON Semiconductor
ON
$29B
| $6.94M | 0.01% |
2,120
-731
| -26% | -$20.4K |
|
771
CALL
Paychex
PAYX
$43.3B
| $6.93M | 0.01% |
744
-399
| -35% | -$35.4K |
|
772
PUT
Fiverr
FVRR
$333M
| $6.93M | 0.01% |
355
-120
| -25% | -$21.7K |
|
773
PUT
Public Storage
PSA
$55.6B
| $6.9M | 0.01% |
299
+193
| +182% | +$44.2K |
|
774
CALL
Aptiv
APTV
$9.96B
| $6.89M | 0.01% |
529
+32
| +6% | +$3.56K |
|
|
CYBR
775
CALL
DELISTED
CyberArk
CYBR
| $6.88M | 0.01% |
426
+75
| +21% | +$8.72K |
|
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 1,710 new, 3,401 increased, 3,105 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 Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Consumer Discretionary and Technology.
- 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 1,710 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.