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 | |
|---|---|---|---|---|---|---|
1551
CALL
TripAdvisor
TRIP
$1.59B
| $4.5M | ﹤0.01% |
304,500
+228,800
| +302% | +$3.34M |
|
1552
CALL
Bit Digital
BTBT
$484M
| $4.5M | ﹤0.01% |
1,534,600
+517,800
| +51% | +$2.04M |
|
|
AZPN
1553
CALL
DELISTED
Aspen Technology Inc
AZPN
| $4.49M | ﹤0.01% |
18,000
+9,100
| +102% | +$2.22M |
|
1554
PUT
Signet Jewelers
SIG
$3.55B
| $4.49M | ﹤0.01% |
55,600
+17,300
| +45% | +$1.61M |
|
|
SGI
1555
PUT
Somnigroup International
SGI
$15.1B
| $4.48M | ﹤0.01% |
79,000
-10,700
| -12% | -$571K |
|
1556
CALL
Crown Holdings
CCK
$12.8B
| $4.47M | ﹤0.01% |
54,100
-18,900
| -26% | -$1.72M |
|
1557
CALL
Allstate
ALL
$66.9B
| $4.47M | ﹤0.01% |
23,200
-2,500
| -10% | -$485K |
|
1558
CALL
Genuine Parts
GPC
$17.1B
| $4.47M | ﹤0.01% |
38,300
-27,800
| -42% | -$3.47M |
|
1559
CALL
Nokia
NOK
$50.8B
| $4.47M | ﹤0.01% |
1,008,800
+282,400
| +39% | +$1.26M |
|
1560
CALL
Academy Sports + Outdoors
ASO
$2.89B
| $4.46M | ﹤0.01% |
77,600
+12,000
| +18% | +$633K |
|
1561
CALL
Dover
DOV
$27.2B
| $4.46M | ﹤0.01% |
23,800
+13,500
| +131% | +$2.64M |
|
1562
PUT
Baker Hughes
BKR
$56.8B
| $4.46M | ﹤0.01% |
108,800
-2,500
| -2% | -$101K |
|
1563
PUT
Celanese
CE
$5.09B
| $4.46M | ﹤0.01% |
64,400
+43,900
| +214% | +$4.22M |
|
1564
CALL
Ralph Lauren
RL
$22.2B
| $4.46M | ﹤0.01% |
19,300
-67,600
| -78% | -$14.4M |
|
1565
CALL
First Citizens BancShares
FCNCA
$24.6B
| $4.44M | ﹤0.01% |
2,100
-3,600
| -63% | -$7.54M |
|
1566
Norwegian Cruise Line
NCLH
$8.89B
| $4.42M | ﹤0.01% |
171,842
-14,278
| -8% | -$361K |
|
1567
CALL
Textron
TXT
$16.6B
| $4.41M | ﹤0.01% |
57,700
+11,400
| +25% | +$955K |
|
1568
CALL
AerCap
AER
$23.9B
| $4.41M | ﹤0.01% |
46,100
-72,800
| -61% | -$6.98M |
|
1569
DexCom
DXCM
$27.6B
| $4.41M | ﹤0.01% |
56,687
+29,958
| +112% | +$2.22M |
|
1570
CALL
Manulife Financial
MFC
$72.6B
| $4.41M | ﹤0.01% |
143,500
+64,400
| +81% | +$2M |
|
1571
Tapestry
TPR
$28.8B
| $4.41M | ﹤0.01% |
+67,428
| New | +$3.68M |
|
1572
Halliburton
HAL
$27.9B
| $4.4M | ﹤0.01% |
161,970
+130,074
| +408% | +$3.8M |
|
1573
PUT
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $4.4M | ﹤0.01% |
75,100
-43,500
| -37% | -$2.64M |
|
1574
PUT
L3Harris
LHX
$55.9B
| $4.39M | ﹤0.01% |
20,900
-28,600
| -58% | -$6.85M |
|
1575
American Airlines Group
AAL
$9.58B
| $4.39M | ﹤0.01% |
252,011
-210,031
| -45% | -$3.02M |
|
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.