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 | |
|---|---|---|---|---|---|---|
776
PUT
Kraft Heinz
KHC
$30.8B
| $17.6M | 0.01% |
476,500
+85,300
| +22% | +$2.9M |
|
777
PUT
S&P Global
SPGI
$127B
| $17.6M | 0.01% |
40,000
+21,500
| +116% | +$8.48M |
|
778
CALL
Teleflex
TFX
$5.97B
| $17.6M | 0.01% |
70,600
+16,600
| +31% | +$3.55M |
|
779
PUT
Alpha Metallurgical Resources
AMR
$1.86B
| $17.4M | 0.01% |
51,300
+31,500
| +159% | +$8.29M |
|
780
PUT
PVH
PVH
$3.69B
| $17.4M | 0.01% |
142,200
+35,400
| +33% | +$3.17M |
|
781
Wells Fargo
WFC
$262B
| $17.4M | 0.01% |
+352,816
| New | +$15.2M |
|
782
CALL
ProShares UltraShort Health Care
RXD
$3.38M
| $17.3M | 0.01% |
567,000
+47,500
| +9% | +$1.25M |
|
783
PUT
NetEase
NTES
$77.6B
| $17.2M | 0.01% |
185,000
+154,100
| +499% | +$16.4M |
|
784
CALL
Altria Group
MO
$121B
| $17.2M | 0.01% |
427,200
-70,100
| -14% | -$2.9M |
|
785
PUT
Ferrari
RACE
$65.4B
| $17.2M | 0.01% |
50,900
+14,800
| +41% | +$4.94M |
|
786
CALL
Moody's
MCO
$85.5B
| $17.1M | 0.01% |
43,900
-12,300
| -22% | -$4.27M |
|
|
IPFF
787
CALL
DELISTED
iShares International Preferred Stock ETF
IPFF
| $17.1M | 0.01% |
348,800
+106,900
| +44% | +$5.25M |
|
788
CALL
Cencora
COR
$58.5B
| $17.1M | 0.01% |
83,300
+7,300
| +10% | +$1.42M |
|
|
DFS
789
PUT
DELISTED
Discover Financial Services
DFS
| $17.1M | 0.01% |
152,100
-133,500
| -47% | -$12.3M |
|
790
PUT
VF Corp
VFC
$6.74B
| $17.1M | 0.01% |
907,400
+157,100
| +21% | +$2.7M |
|
791
CALL
BHP
BHP
$215B
| $17M | 0.01% |
249,600
+156,200
| +167% | +$9.43M |
|
|
UCD
792
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $17M | 0.01% |
371,200
+173,800
| +88% | +$7.95M |
|
|
P
793
CALL
Everpure Inc
P
$24.8B
| $17M | 0.01% |
476,000
-141,400
| -23% | -$4.96M |
|
794
CALL
argenx
ARGX
$53.3B
| $17M | 0.01% |
44,600
+32,400
| +266% | +$15.1M |
|
795
CALL
Invesco CurrencyShares Japanese Yen Trust
FXY
$425M
| $17M | 0.01% |
257,800
+203,800
| +377% | +$12.8M |
|
796
CALL
Sigma Lithium
SGML
$1.14B
| $16.9M | 0.01% |
535,600
+361,400
| +207% | +$10.1M |
|
797
CALL
Prologis
PLD
$135B
| $16.9M | 0.01% |
126,600
+7,800
| +7% | +$885K |
|
798
FedEx
FDX
$75.9B
| $16.8M | 0.01% |
+66,578
| New | +$16.9M |
|
799
CALL
Carlyle Group
CG
$15.9B
| $16.8M | 0.01% |
413,200
+172,200
| +71% | +$5.67M |
|
800
PUT
Toyota
TM
$213B
| $16.7M | 0.01% |
91,100
+39,100
| +75% | +$7.13M |
|
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.