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 | |
|---|---|---|---|---|---|---|
4401
PUT
Innoviz Technologies
INVZ
$85.5M
| $228K | ﹤0.01% |
275,700
-43,000
| -13% | -$32.7K |
|
|
AIOT
4402
PUT
PowerFleet Inc
AIOT
$535M
| $228K | ﹤0.01% |
45,600
+42,100
| +1,203% | +$200K |
|
|
AHRT
4403
CALL
AH Realty Trust
AHRT
$536M
| $227K | ﹤0.01% |
21,000
-700
| -3% | -$8.18K |
|
4404
PUT
Dine Brands
DIN
$458M
| $227K | ﹤0.01% |
7,300
-6,800
| -48% | -$219K |
|
|
EARN
4405
CALL
Ellington Residential Mortgage REIT
EARN
$166M
| $227K | ﹤0.01% |
32,600
+700
| +2% | +$4.86K |
|
4406
Rayonier Advanced Materials
RYAM
$558M
| $227K | ﹤0.01% |
26,631
-56,827
| -68% | -$394K |
|
|
SWTX
4407
CALL
DELISTED
SpringWorks Therapeutics
SWTX
| $227K | ﹤0.01% |
7,100
+4,900
| +223% | +$183K |
|
4408
PUT
BlackSky Technology
BKSY
$842M
| $226K | ﹤0.01% |
47,700
+41,737
| +700% | +$330K |
|
4409
CALL
El Pollo Loco
LOCO
$505M
| $226K | ﹤0.01% |
16,500
+11,500
| +230% | +$144K |
|
4410
CALL
RLX Technology
RLX
$2.37B
| $226K | ﹤0.01% |
125,200
-44,000
| -26% | -$75.5K |
|
4411
WEX
WEX
$6.46B
| $226K | ﹤0.01% |
+1,082
| New | +$202K |
|
4412
CALL
GATX Corp
GATX
$6.43B
| $225K | ﹤0.01% |
1,700
-500
| -23% | -$68.8K |
|
4413
CALL
NiSource
NI
$21.5B
| $225K | ﹤0.01% |
6,500
-50,900
| -89% | -$1.62M |
|
4414
PUT
SFL Corp
SFL
$1.62B
| $225K | ﹤0.01% |
19,500
-22,100
| -53% | -$264K |
|
|
FBRT
4415
CALL
Franklin BSP Realty Trust
FBRT
$583M
| $224K | ﹤0.01% |
17,200
-2,800
| -14% | -$36.8K |
|
4416
CALL
Hamilton Insurance Group
HG
$3.61B
| $224K | ﹤0.01% |
11,600
+6,100
| +111% | +$109K |
|
4417
AerSale
ASLE
$293M
| $223K | ﹤0.01% |
44,252
+26,900
| +155% | +$155K |
|
4418
GraniteShares 2x Long COIN Daily ETF
CONL
$480M
| $223K | ﹤0.01% |
8,995
+8,965
| +29,883% | +$315K |
|
4419
Harmonic Inc
HLIT
$1.15B
| $223K | ﹤0.01% |
15,351
+12,232
| +392% | +$163K |
|
4420
CALL
Morningstar
MORN
$7.54B
| $223K | ﹤0.01% |
700
+500
| +250% | +$155K |
|
4421
First Trust NASDAQ Cybersecurity ETF
CIBR
$13.9B
| $222K | ﹤0.01% |
3,757
-164
| -4% | -$9.36K |
|
4422
Marqeta
MQ
$1.94B
| $222K | ﹤0.01% |
11,330
+5,451
| +93% | +$114K |
|
4423
CALL
Telos
TLS
$331M
| $222K | ﹤0.01% |
62,000
+51,600
| +496% | +$185K |
|
4424
PUT
Anavex Life Sciences
AVXL
$231M
| $221K | ﹤0.01% |
39,000
+21,900
| +128% | +$126K |
|
|
PRA
4425
PUT
DELISTED
ProAssurance
PRA
| $221K | ﹤0.01% |
14,700
-94,600
| -87% | -$1.21M |
|
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.