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 | |
|---|---|---|---|---|---|---|
1451
C3.ai
AI
$1.27B
| $5.26M | ﹤0.01% |
217,036
-143,638
| -40% | -$3.65M |
|
1452
CALL
Lantheus
LNTH
$6.82B
| $5.26M | ﹤0.01% |
47,900
-500
| -1% | -$51.9K |
|
1453
PUT
Rocket Companies
RKT
$36.9B
| $5.25M | ﹤0.01% |
273,700
-10,800
| -4% | -$190K |
|
1454
CALL
Equinix
EQIX
$107B
| $5.24M | ﹤0.01% |
5,900
-29,700
| -83% | -$24.3M |
|
1455
CALL
Kimbell Royalty Partners
KRP
$1.47B
| $5.24M | ﹤0.01% |
325,500
-29,200
| -8% | -$470K |
|
1456
PUT
Navios Maritime Partners
NMM
$2.25B
| $5.24M | ﹤0.01% |
83,600
+30,600
| +58% | +$1.57M |
|
1457
CALL
Northern Oil and Gas
NOG
$2.3B
| $5.23M | ﹤0.01% |
147,700
-22,300
| -13% | -$851K |
|
1458
CALL
Consolidated Edison
ED
$41.6B
| $5.22M | ﹤0.01% |
50,100
-55,200
| -52% | -$5.46M |
|
1459
PUT
MPLX
MPLX
$59.5B
| $5.21M | ﹤0.01% |
117,300
-84,000
| -42% | -$3.59M |
|
1460
CALL
Bank OZK
OZK
$5.49B
| $5.21M | ﹤0.01% |
121,300
-33,600
| -22% | -$1.43M |
|
1461
PUT
CRISPR Therapeutics
CRSP
$4.58B
| $5.21M | ﹤0.01% |
110,800
-39,200
| -26% | -$1.99M |
|
1462
American Airlines Group
AAL
$9.58B
| $5.19M | ﹤0.01% |
462,042
-292,703
| -39% | -$3.1M |
|
1463
Coinbase
COIN
$41.7B
| $5.18M | ﹤0.01% |
29,066
-68,643
| -70% | -$13.7M |
|
1464
PUT
Beyond Meat
BYND
$288M
| $5.17M | ﹤0.01% |
762,800
-99,900
| -12% | -$632K |
|
|
DENT
1465
PUT
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $5.17M | ﹤0.01% |
727,000
+269,300
| +59% | +$1.91M |
|
1466
PUT
Toast
TOST
$16.8B
| $5.16M | ﹤0.01% |
182,300
+32,000
| +21% | +$811K |
|
1467
CALL
ClearShares Piton Intermediate Fixed Income ETF
PIFI
$97.5M
| $5.13M | ﹤0.01% |
247,400
+37,700
| +18% | +$3.55M |
|
1468
CALL
iRhythm Holdings
IRTC
$3.59B
| $5.12M | ﹤0.01% |
69,000
+63,000
| +1,050% | +$5.02M |
|
|
MRO
1469
CALL
DELISTED
Marathon Oil Corporation
MRO
| $5.12M | ﹤0.01% |
192,300
-105,600
| -35% | -$2.92M |
|
|
CFLT
1470
PUT
DELISTED
Confluent
CFLT
| $5.12M | ﹤0.01% |
251,000
+33,700
| +16% | +$755K |
|
1471
CALL
Equifax
EFX
$20.3B
| $5.11M | ﹤0.01% |
17,400
-7,800
| -31% | -$2.2M |
|
1472
CALL
Centrus Energy
LEU
$3.22B
| $5.11M | ﹤0.01% |
93,200
+67,900
| +268% | +$2.84M |
|
|
PPL
1473
CALL
PPL Corp
PPL
$27.3B
| $5.11M | ﹤0.01% |
154,400
-53,200
| -26% | -$1.63M |
|
1474
PUT
Manchester United
MANU
$3.91B
| $5.1M | ﹤0.01% |
315,500
+117,200
| +59% | +$1.96M |
|
1475
Johnson & Johnson
JNJ
$634B
| $5.1M | ﹤0.01% |
31,467
-107,178
| -77% | -$17.1M |
|
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.