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 | |
|---|---|---|---|---|---|---|
426
CALL
Hershey
HSY
$35B
| $38.8M | 0.02% |
207,900
+151,800
| +271% | +$28.8M |
|
427
CALL
Norwegian Cruise Line
NCLH
$8.87B
| $38.7M | 0.02% |
1,931,700
+1,060,100
| +122% | +$17M |
|
428
CALL
ON Semiconductor
ON
$35.9B
| $38.7M | 0.02% |
463,300
+127,300
| +38% | +$10M |
|
429
PUT
Ford
F
$57.5B
| $38.6M | 0.02% |
3,165,500
-997,400
| -24% | -$11.1M |
|
430
CALL
Kraft Heinz
KHC
$30.8B
| $38.4M | 0.02% |
1,039,600
+219,700
| +27% | +$7.47M |
|
431
PUT
Cytokinetics
CYTK
$11.2B
| $38.4M | 0.02% |
460,000
+409,900
| +818% | +$14.8M |
|
432
iShares China Large-Cap ETF
FXI
$4.29B
| $38.3M | 0.02% |
1,594,712
+1,022,915
| +179% | +$25.9M |
|
433
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $38.2M | 0.02% |
94,000
+32,500
| +53% | +$12M |
|
434
PUT
Comcast
CMCSA
$84B
| $38.2M | 0.02% |
871,700
+236,300
| +37% | +$10.1M |
|
435
PUT
Hasbro
HAS
$12.6B
| $38.2M | 0.02% |
748,500
+522,400
| +231% | +$26.4M |
|
436
PUT
CarMax
KMX
$8.15B
| $38M | 0.02% |
494,900
+206,800
| +72% | +$13.9M |
|
437
CALL
XPeng
XPEV
$12.3B
| $38M | 0.02% |
2,602,400
+154,200
| +6% | +$2.45M |
|
438
PUT
Zoom
ZM
$25.2B
| $37.9M | 0.02% |
526,400
-56,200
| -10% | -$3.72M |
|
439
PUT
Cheniere Energy
LNG
$56B
| $37.8M | 0.02% |
221,600
+116,700
| +111% | +$20.1M |
|
440
PUT
PepsiCo
PEP
$185B
| $37.8M | 0.02% |
297,400
+20,200
| +7% | +$3.35M |
|
441
CALL
Nucor
NUE
$53.7B
| $37.8M | 0.02% |
217,300
+33,900
| +18% | +$5.37M |
|
|
B
442
CALL
Barrick Mining
B
$62.8B
| $37.6M | 0.02% |
2,288,600
-475,200
| -17% | -$7.8M |
|
443
CALL
Expedia Group
EXPE
$31.3B
| $37.6M | 0.02% |
247,600
+43,000
| +21% | +$5.27M |
|
444
CALL
Cleveland-Cliffs
CLF
$5.39B
| $37.5M | 0.02% |
1,836,900
+448,000
| +32% | +$7.67M |
|
445
CALL
Philip Morris
PM
$303B
| $37.3M | 0.02% |
396,100
+45,200
| +13% | +$4.16M |
|
446
PUT
Devon Energy
DVN
$51.8B
| $37.3M | 0.02% |
822,600
-339,200
| -29% | -$15.5M |
|
447
Procter & Gamble
PG
$347B
| $37M | 0.02% |
252,247
+98,912
| +65% | +$14.6M |
|
448
CALL
Live Nation Entertainment
LYV
$41.4B
| $36.9M | 0.02% |
394,300
+231,100
| +142% | +$19.9M |
|
449
PUT
Charter Communications
CHTR
$15.9B
| $36.7M | 0.02% |
94,400
+34,000
| +56% | +$13.9M |
|
450
CALL
MetLife
MET
$60B
| $36.5M | 0.02% |
552,600
-136,300
| -20% | -$8.53M |
|
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.