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 | |
|---|---|---|---|---|---|---|
4476
CALL
Prospect Capital
PSEC
$1.08B
| $210K | ﹤0.01% |
39,300
-1,600
| -4% | -$8.49K |
|
4477
PUT
TriplePoint Venture Growth BDC
TPVG
$184M
| $210K | ﹤0.01% |
29,800
-11,000
| -27% | -$85.8K |
|
4478
CALL
Wheels Up
UP
$203M
| $210K | ﹤0.01% |
4,355
+760
| +21% | +$37.1K |
|
|
TPC
4479
PUT
Tutor Perini Cor
TPC
$4.03B
| $209K | ﹤0.01% |
7,700
-3,700
| -32% | -$84.6K |
|
4480
Direxion Daily Real Estate Bull 3X ETF
DRN
$48.5M
| $208K | ﹤0.01% |
+15,558
| New | +$177K |
|
4481
Fortis
FTS
$29.3B
| $208K | ﹤0.01% |
4,578
+4,239
| +1,250% | +$181K |
|
4482
PUT
Gogo Inc
GOGO
$525M
| $208K | ﹤0.01% |
29,000
-72,100
| -71% | -$588K |
|
4483
CALL
Oaktree Specialty Lending
OCSL
$1.05B
| $208K | ﹤0.01% |
12,800
+1,900
| +17% | +$32.5K |
|
|
TPH
4484
PUT
DELISTED
Tri Pointe Homes
TPH
| $208K | ﹤0.01% |
4,600
+2,600
| +130% | +$111K |
|
4485
PUT
Nordic American Tanker
NAT
$1.36B
| $207K | ﹤0.01% |
56,600
-32,100
| -36% | -$118K |
|
4486
CALL
Pacira BioSciences
PCRX
$1.04B
| $207K | ﹤0.01% |
13,800
+4,700
| +52% | +$80.4K |
|
4487
PUT
PRA Group
PRAA
$672M
| $207K | ﹤0.01% |
9,300
-6,900
| -43% | -$154K |
|
4488
CALL
iShares 0-5 Year Investment Grade Corporate Bond ETF
SLQD
$2.37B
| $207K | ﹤0.01% |
4,400
-7,000
| -61% | -$349K |
|
|
4489
Oaktree Specialty Lending
OCSL
$1.05B
| $206K | ﹤0.01% |
+12,643
| New | +$217K |
|
4490
PUT
Trex
TREX
$4.4B
| $206K | ﹤0.01% |
3,100
-60,200
| -95% | -$4.23M |
|
4491
Allegro MicroSystems
ALGM
$7.86B
| $205K | ﹤0.01% |
+8,802
| New | +$221K |
|
|
HITI
4492
CALL
High Tide
HITI
$180M
| $205K | ﹤0.01% |
100,100
+3,700
| +4% | +$7.32K |
|
4493
CALL
McEwen Inc
MUX
$1B
| $205K | ﹤0.01% |
22,100
-23,800
| -52% | -$220K |
|
|
TGB
4494
PUT
Trekor Metals
TGB
$2.45B
| $205K | ﹤0.01% |
81,700
+49,400
| +153% | +$110K |
|
4495
iHeartMedia
IHRT
$531M
| $204K | ﹤0.01% |
110,551
+42,608
| +63% | +$63.5K |
|
4496
PUT
MarketAxess Holdings
MKTX
$4.47B
| $204K | ﹤0.01% |
800
-13,700
| -94% | -$3.21M |
|
|
TGB
4497
CALL
Trekor Metals
TGB
$2.45B
| $204K | ﹤0.01% |
81,000
+31,900
| +65% | +$70.9K |
|
4498
PUT
AMN Healthcare
AMN
$1.35B
| $203K | ﹤0.01% |
4,800
-12,100
| -72% | -$634K |
|
4499
CALL
CG Oncology
CGON
$6.1B
| $203K | ﹤0.01% |
+5,400
| New | +$189K |
|
4500
CALL
1stdibs.com
DIBS
$148M
| $203K | ﹤0.01% |
46,100
| – | – |
|
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.