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 | |
|---|---|---|---|---|---|---|
|
TWO
3426
PUT
Two Harbors Investment
TWO
$1.27B
| $589K | ﹤0.01% |
42,500
-40,800
| -49% | -$556K |
|
3427
PUT
Equifax
EFX
$20.8B
| $587K | ﹤0.01% |
2,000
-4,000
| -67% | -$1.13M |
|
3428
CALL
Booz Allen Hamilton
BAH
$8.59B
| $585K | ﹤0.01% |
3,600
+1,700
| +89% | +$260K |
|
3429
CALL
Eversource Energy
ES
$28.1B
| $585K | ﹤0.01% |
8,600
-14,000
| -62% | -$905K |
|
3430
CALL
Empire State Realty Trust
ESRT
$969M
| $585K | ﹤0.01% |
52,800
+52,000
| +6,500% | +$543K |
|
3431
PUT
FLEX LNG
FLNG
$1.65B
| $585K | ﹤0.01% |
23,000
-2,500
| -10% | -$66.1K |
|
3432
PUT
Enviri
NVRI
$620M
| $585K | ﹤0.01% |
+56,600
| New | +$596K |
|
3433
CALL
Crescent Energy
CRGY
$3.46B
| $583K | ﹤0.01% |
53,300
-23,900
| -31% | -$273K |
|
3434
CALL
ITT
ITT
$17.7B
| $583K | ﹤0.01% |
3,900
-500
| -11% | -$68.1K |
|
3435
CALL
Kinetik
KNTK
$3.59B
| $583K | ﹤0.01% |
12,900
+6,000
| +87% | +$260K |
|
3436
CALL
Ascendis Pharma A/S
ASND
$16.6B
| $582K | ﹤0.01% |
3,900
-5,300
| -58% | -$716K |
|
|
BORR
3437
PUT
Borr Drilling
BORR
$1.27B
| $582K | ﹤0.01% |
106,100
-35,800
| -25% | -$219K |
|
3438
CALL
Fortrea Holdings
FTRE
$1.82B
| $582K | ﹤0.01% |
29,100
+5,200
| +22% | +$122K |
|
3439
CALL
indie Semiconductor
INDI
$727M
| $582K | ﹤0.01% |
146,100
+24,000
| +20% | +$117K |
|
3440
PUT
Bitdeer Technologies
BTDR
$2.76B
| $579K | ﹤0.01% |
74,000
+19,500
| +36% | +$162K |
|
|
GOEV
3441
PUT
DELISTED
Canoo Inc. Class A Common Stock
GOEV
| $579K | ﹤0.01% |
29,465
-2,050
| -7% | -$68.8K |
|
3442
PUT
Carter's
CRI
$1.43B
| $578K | ﹤0.01% |
8,900
+1,400
| +19% | +$89.9K |
|
3443
CALL
Ameren
AEE
$31B
| $577K | ﹤0.01% |
6,600
-7,200
| -52% | -$577K |
|
3444
CALL
Patterson-UTI
PTEN
$3.57B
| $577K | ﹤0.01% |
75,500
-8,800
| -10% | -$81.1K |
|
3445
PUT
Zymeworks
ZYME
$1.69B
| $577K | ﹤0.01% |
46,000
+9,800
| +27% | +$107K |
|
3446
PUT
Credit Acceptance
CACC
$5.78B
| $576K | ﹤0.01% |
1,300
-200
| -13% | -$98.3K |
|
3447
PUT
Pampa Energía
PAM
$4.61B
| $576K | ﹤0.01% |
9,600
+5,400
| +129% | +$276K |
|
3448
Palomar
PLMR
$3.73B
| $575K | ﹤0.01% |
6,075
+2,109
| +53% | +$194K |
|
3449
PUT
STAAR Surgical
STAA
$1.14B
| $575K | ﹤0.01% |
15,500
-4,700
| -23% | -$175K |
|
3450
PUT
TransUnion
TRU
$14.9B
| $575K | ﹤0.01% |
5,500
-700
| -11% | -$63.1K |
|
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.