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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1526
ProShares UltraShort Bloomberg Natural Gas
KOLD
$110M
| $4.74M | ﹤0.01% |
85,830
+20,178
| +31% | +$1.37M |
|
1527
CALL
Public Service Enterprise Group
PEG
$39.8B
| $4.74M | ﹤0.01% |
53,100
-20,600
| -28% | -$1.64M |
|
1528
PUT
C.H. Robinson
CHRW
$22B
| $4.72M | ﹤0.01% |
42,800
-14,800
| -26% | -$1.44M |
|
1529
PUT
Restaurant Brands International
QSR
$25.1B
| $4.72M | ﹤0.01% |
65,500
+7,200
| +12% | +$506K |
|
1530
PUT
Kinder Morgan
KMI
$73.1B
| $4.71M | ﹤0.01% |
213,300
+89,900
| +73% | +$1.89M |
|
1531
CALL
Vital Farms
VITL
$558M
| $4.71M | ﹤0.01% |
134,300
+129,400
| +2,641% | +$4.57M |
|
|
SKX
1532
PUT
DELISTED
Skechers
SKX
| $4.7M | ﹤0.01% |
70,300
-32,200
| -31% | -$2.11M |
|
1533
PUT
Macerich
MAC
$7.32B
| $4.7M | ﹤0.01% |
257,800
+185,900
| +259% | +$2.93M |
|
1534
CALL
Clean Harbors
CLH
$16.1B
| $4.69M | ﹤0.01% |
19,400
+10,700
| +123% | +$2.52M |
|
|
SAVE
1535
PUT
DELISTED
Spirit Airlines, Inc.
SAVE
| $4.69M | ﹤0.01% |
1,953,700
+118,800
| +6% | +$327K |
|
1536
PUT
Tradeweb Markets
TW
$21.3B
| $4.69M | ﹤0.01% |
37,900
-17,300
| -31% | -$1.96M |
|
1537
TransDigm Group
TDG
$69.2B
| $4.68M | ﹤0.01% |
3,282
+472
| +17% | +$614K |
|
1538
Wolfspeed
WOLF
$1.2B
| $4.68M | ﹤0.01% |
482,813
+204,848
| +74% | +$3.02M |
|
1539
Tyson Foods
TSN
$20.2B
| $4.67M | ﹤0.01% |
78,357
-25,395
| -24% | -$1.55M |
|
|
P
1540
PUT
Everpure Inc
P
$24.8B
| $4.66M | ﹤0.01% |
92,800
-2,200
| -2% | -$124K |
|
1541
PUT
Penske Automotive Group
PAG
$14.3B
| $4.66M | ﹤0.01% |
28,700
+19,600
| +215% | +$3.13M |
|
1542
United States Oil Fund
USO
$2.45B
| $4.66M | ﹤0.01% |
66,596
+65,533
| +6,165% | +$4.92M |
|
1543
CALL
FMC
FMC
$1.42B
| $4.66M | ﹤0.01% |
70,600
-30,600
| -30% | -$1.87M |
|
1544
CALL
Icon
ICLR
$12.8B
| $4.65M | ﹤0.01% |
16,200
+15,100
| +1,373% | +$4.76M |
|
1545
CALL
Vanguard Dividend Appreciation ETF
VIG
$111B
| $4.65M | ﹤0.01% |
23,500
+6,300
| +37% | +$1.2M |
|
1546
CALL
Toro Company
TTC
$8.93B
| $4.65M | ﹤0.01% |
53,600
+100
| +0.2% | +$8.99K |
|
1547
CALL
Array Technologies
ARRY
$818M
| $4.64M | ﹤0.01% |
702,800
+540,000
| +332% | +$4.44M |
|
1548
PUT
Blackstone Mortgage Trust
BXMT
$2.82B
| $4.64M | ﹤0.01% |
243,900
+14,700
| +6% | +$270K |
|
1549
CALL
NexGen Energy
NXE
$6.05B
| $4.64M | ﹤0.01% |
710,100
-137,900
| -16% | -$856K |
|
1550
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $4.63M | ﹤0.01% |
+71,971
| New | +$4.47M |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.