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 | |
|---|---|---|---|---|---|---|
5101
PUT
VistaGen Therapeutics
VTGN
$10M
| $114K | ﹤0.01% |
38,000
-31,300
| -45% | -$107K |
|
5102
PUT
Highwoods Properties
HIW
$3.65B
| $113K | ﹤0.01% |
3,400
-1,400
| -29% | -$42.8K |
|
5103
CALL
NGL Energy Partners
NGL
$2.03B
| $113K | ﹤0.01% |
25,300
+700
| +3% | +$3.13K |
|
5104
CALL
OFS Capital
OFS
$44.3M
| $113K | ﹤0.01% |
13,400
+8,500
| +173% | +$71.5K |
|
5105
Red Robin
RRGB
$144M
| $113K | ﹤0.01% |
+25,723
| New | +$126K |
|
5106
Turning Point Brands
TPB
$1.45B
| $113K | ﹤0.01% |
+2,639
| New | +$101K |
|
5107
Zevra Therapeutics
ZVRA
$563M
| $113K | ﹤0.01% |
16,380
-52,817
| -76% | -$358K |
|
|
SUM
5108
PUT
DELISTED
Summit Materials, Inc. Class A Common Stock
SUM
| $113K | ﹤0.01% |
2,900
-200
| -6% | -$7.69K |
|
5109
Adtran
ADTN
$687M
| $112K | ﹤0.01% |
+18,971
| New | +$106K |
|
5110
BCB Bancorp
BCBP
$173M
| $112K | ﹤0.01% |
9,090
+2,392
| +36% | +$28.3K |
|
5111
PUT
Brookfield Renewable
BEP
$9.98B
| $112K | ﹤0.01% |
4,000
+1,900
| +90% | +$47.8K |
|
5112
Carter Bankshares
CARE
$763M
| $112K | ﹤0.01% |
6,492
+5,923
| +1,041% | +$97.4K |
|
5113
CALL
Cooper-Standard Automotive
CPS
$521M
| $112K | ﹤0.01% |
8,100
-11,300
| -58% | -$157K |
|
5114
CALL
Gevo
GEVO
$360M
| $112K | ﹤0.01% |
68,900
+22,600
| +49% | +$18.3K |
|
|
HUYA
5115
CALL
Huya Inc
HUYA
$565M
| $112K | ﹤0.01% |
22,000
-14,400
| -40% | -$61.9K |
|
5116
CALL
Titan Machinery
TITN
$396M
| $112K | ﹤0.01% |
8,100
+4,900
| +153% | +$73.5K |
|
5117
PUT
Agios Pharmaceuticals
AGIO
$1.79B
| $111K | ﹤0.01% |
2,500
-18,100
| -88% | -$822K |
|
5118
Antero Midstream
AM
$10.4B
| $111K | ﹤0.01% |
+7,382
| New | +$108K |
|
5119
PUT
Bentley Systems
BSY
$10.8B
| $111K | ﹤0.01% |
2,200
+1,600
| +267% | +$78.8K |
|
5120
PUT
Hexcel
HXL
$7.89B
| $111K | ﹤0.01% |
1,800
+1,200
| +200% | +$75.4K |
|
5121
CALL
Saratoga Investment
SAR
$311M
| $111K | ﹤0.01% |
4,800
-1,400
| -23% | -$32.3K |
|
5122
PUT
Similarweb
SMWB
$630M
| $111K | ﹤0.01% |
+12,600
| New | +$99.6K |
|
5123
PUT
Full Truck Alliance
YMM
$9.83B
| $111K | ﹤0.01% |
12,400
-70,300
| -85% | -$539K |
|
|
BHR
5124
Braemar Hotels & Resorts
BHR
$155M
| $110K | ﹤0.01% |
35,704
-103,648
| -74% | -$326K |
|
|
BLD
5125
DELISTED
TopBuild
BLD
| $110K | ﹤0.01% |
271
+5
| +2% | +$2.02K |
|
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.