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 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1526
CALL
Boyd Gaming
BYD
$6.47B
| $4.63M | ﹤0.01% |
63,900
+14,200
| +29% | +$996K |
|
1527
CALL
Gen Digital
GEN
$15.6B
| $4.63M | ﹤0.01% |
169,000
-25,100
| -13% | -$722K |
|
1528
PUT
Ambarella
AMBA
$2.99B
| $4.63M | ﹤0.01% |
63,600
-1,800
| -3% | -$115K |
|
|
AMTM
1529
Amentum Holdings
AMTM
$5.51B
| $4.63M | ﹤0.01% |
+219,981
| New | +$5.69M |
|
1530
CALL
Canadian Pacific Kansas City
CP
$82B
| $4.62M | ﹤0.01% |
63,900
+24,700
| +63% | +$1.9M |
|
1531
PUT
Crown Holdings
CCK
$12.8B
| $4.62M | ﹤0.01% |
55,900
-29,000
| -34% | -$2.64M |
|
1532
Western Digital
WDC
$179B
| $4.62M | ﹤0.01% |
102,490
+62,612
| +157% | +$3.15M |
|
|
FL
1533
PUT
DELISTED
Foot Locker
FL
| $4.62M | ﹤0.01% |
212,200
-81,200
| -28% | -$1.9M |
|
1534
PUT
Toronto Dominion Bank
TD
$198B
| $4.61M | ﹤0.01% |
86,600
+48,600
| +128% | +$2.73M |
|
1535
Whirlpool
WHR
$2.42B
| $4.6M | ﹤0.01% |
40,176
-13,127
| -25% | -$1.45M |
|
1536
Alexandria Real Estate Equities
ARE
$8.88B
| $4.6M | ﹤0.01% |
47,131
+44,062
| +1,436% | +$4.83M |
|
1537
PUT
VICI Properties
VICI
$29.4B
| $4.59M | ﹤0.01% |
157,200
+96,900
| +161% | +$3.06M |
|
1538
PUT
FMC
FMC
$1.42B
| $4.58M | ﹤0.01% |
94,200
+2,700
| +3% | +$158K |
|
1539
PUT
KeyCorp
KEY
$24.3B
| $4.57M | ﹤0.01% |
266,600
-74,100
| -22% | -$1.33M |
|
|
CHGX
1540
PUT
DELISTED
AXS Change Finance ESG ETF
CHGX
| $4.57M | ﹤0.01% |
169,800
+89,800
| +112% | +$3.51M |
|
1541
PUT
GlobalFoundries
GFS
$29.4B
| $4.56M | ﹤0.01% |
106,200
-3,500
| -3% | -$147K |
|
1542
PUT
Vail Resorts
MTN
$5.19B
| $4.55M | ﹤0.01% |
24,300
-15,700
| -39% | -$2.81M |
|
1543
CALL
Hyatt Hotels
H
$17.6B
| $4.55M | ﹤0.01% |
29,000
+900
| +3% | +$140K |
|
1544
iShares US Aerospace & Defense ETF
ITA
$14.2B
| $4.55M | ﹤0.01% |
+31,305
| New | +$4.72M |
|
1545
PUT
HF Sinclair
DINO
$15.9B
| $4.55M | ﹤0.01% |
129,800
+93,900
| +262% | +$3.84M |
|
1546
CALL
POET Technologies
POET
$1.19B
| $4.55M | ﹤0.01% |
764,200
+525,400
| +220% | +$2.33M |
|
1547
Constellation Brands
STZ
$22.2B
| $4.54M | ﹤0.01% |
20,544
+5,062
| +33% | +$1.2M |
|
1548
PUT
PPG Industries
PPG
$25.9B
| $4.53M | ﹤0.01% |
37,900
-24,500
| -39% | -$3.06M |
|
1549
CALL
Cipher Digital
CIFR
$9.47B
| $4.53M | ﹤0.01% |
975,300
+34,500
| +4% | +$196K |
|
1550
CALL
Target Hospitality
TH
$1.61B
| $4.5M | ﹤0.01% |
466,100
-400,300
| -46% | -$3.35M |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.