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
|
+$120M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$93.9M |
| 3 |
Walt Disney
DIS
|
+$71.7M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.7M |
| 5 |
Citigroup
C
|
+$39.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$136M |
| 2 |
Amazon
AMZN
|
+$118M |
| 3 |
SPDR Gold Trust
GLD
|
+$56.2M |
| 4 |
Microsoft
MSFT
|
+$52.4M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$45.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.33% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Communication Services | 0.21% |
| 4 | Financials | 0.19% |
| 5 | Healthcare | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2401
CALL
Royalty Pharma
RPRX
$26.1B
| $1.9M | ﹤0.01% |
67,800
-24,400
| -26% | -$671K |
|
2402
CALL
Hycroft Mining Holding Corp
HYMC
$1.85B
| $1.9M | ﹤0.01% |
777,100
+689,830
| +790% | +$1.66M |
|
2403
CALL
FT Vest Gold Strategy Target Income ETF
IGLD
$507M
| $1.9M | ﹤0.01% |
28,200
+1,300
| +5% | +$24.2K |
|
2404
Dollar General
DG
$25.9B
| $1.9M | ﹤0.01% |
13,991
-12,464
| -47% | -$1.51M |
|
2405
PUT
Cinemark Holdings
CNK
$3.82B
| $1.9M | ﹤0.01% |
134,700
+36,500
| +37% | +$568K |
|
2406
Asana
ASAN
$1.58B
| $1.9M | ﹤0.01% |
99,789
+52,080
| +109% | +$1.01M |
|
2407
CALL
iQIYI
IQ
$1.18B
| $1.9M | ﹤0.01% |
388,600
-323,100
| -45% | -$1.53M |
|
2408
CALL
Watts Water Technologies
WTS
$11.5B
| $1.9M | ﹤0.01% |
+9,100
| New | +$1.72M |
|
|
CHGX
2409
CALL
DELISTED
AXS Change Finance ESG ETF
CHGX
| $1.89M | ﹤0.01% |
72,300
+10,400
| +17% | +$321K |
|
2410
PUT
Melco Resorts & Entertainment
MLCO
$2.1B
| $1.89M | ﹤0.01% |
213,400
+73,600
| +53% | +$600K |
|
2411
Acadia Pharmaceuticals
ACAD
$4.25B
| $1.89M | ﹤0.01% |
60,365
-19,023
| -24% | -$454K |
|
2412
CALL
Costamare
CMRE
$1.9B
| $1.89M | ﹤0.01% |
181,300
-59,000
| -25% | -$563K |
|
2413
CALL
Perion Network
PERI
$367M
| $1.89M | ﹤0.01% |
61,100
-31,100
| -34% | -$883K |
|
2414
PUT
PagSeguro Digital
PAGS
$2.57B
| $1.89M | ﹤0.01% |
151,200
+900
| +0.6% | +$8.28K |
|
2415
CALL
Saia
SAIA
$11.3B
| $1.88M | ﹤0.01% |
4,300
+500
| +13% | +$202K |
|
2416
CALL
UDR
UDR
$12.9B
| $1.88M | ﹤0.01% |
49,200
+49,000
| +24,500% | +$1.7M |
|
2417
CALL
Impinj
PI
$3.89B
| $1.88M | ﹤0.01% |
20,900
-14,100
| -40% | -$1.01M |
|
2418
PUT
Bread Financial
BFH
$4.21B
| $1.88M | ﹤0.01% |
57,100
+53,100
| +1,328% | +$1.59M |
|
2419
CALL
Fiverr
FVRR
$376M
| $1.88M | ﹤0.01% |
69,100
+43,100
| +166% | +$1.07M |
|
2420
CALL
Rapid7
RPD
$634M
| $1.88M | ﹤0.01% |
32,900
-24,100
| -42% | -$1.26M |
|
2421
Organon & Co
OGN
$3.55B
| $1.88M | ﹤0.01% |
+130,095
| New | +$1.77M |
|
|
HOLX
2422
CALL
DELISTED
Hologic
HOLX
| $1.87M | ﹤0.01% |
26,200
+10,700
| +69% | +$745K |
|
2423
MGM Resorts International
MGM
$11.7B
| $1.87M | ﹤0.01% |
41,879
-66,519
| -61% | -$2.61M |
|
2424
CALL
ScottsMiracle-Gro
SMG
$4.03B
| $1.87M | ﹤0.01% |
29,300
-15,500
| -35% | -$837K |
|
2425
PUT
Range Resources
RRC
$9.11B
| $1.86M | ﹤0.01% |
61,300
-16,100
| -21% | -$528K |
|
Similar funds
Simplex Trading's Q4 2023 Portfolio in Review
As of Q4 2023, Simplex Trading held 10,333 positions worth $156B, up 23% from $127B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading deployed $15.1B of net new capital in Q4 2023, opening 1,639 new positions and adding to 3,920 existing holdings. Its largest new stake was Walt Disney: 812,984 shares worth $73.4M.
By sector, the portfolio is most concentrated in Technology at 0.33% of assets, down from 0.44% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was iShares 20+ Year Treasury Bond ETF, an estimated $136M trimmed.
- Simplex Trading's largest Q4 2023 buy was Walt Disney: 812,984 shares worth $73.4M.
- Simplex Trading added most to Alibaba in Q4 2023, an estimated $120M increase.
- Simplex Trading's biggest Q4 2023 reduction was iShares 20+ Year Treasury Bond ETF, cutting an estimated $136M.
- Simplex Trading fully exited Amazon in Q4 2023, selling an estimated $118M.
- Simplex Trading's ten largest holdings make up 42% of its $156B portfolio in Q4 2023.
- Simplex Trading opened 1,639 new positions and closed 1,508 in Q4 2023.
- Simplex Trading's portfolio value rose 23% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q4 2023, filed 2 Feb 2024.