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 | |
|---|---|---|---|---|---|---|
5151
iShares MSCI Japan Small-Cap ETF
SCJ
$253M
| $108K | ﹤0.01% |
1,373
+985
| +254% | +$73.3K |
|
5152
PUT
UDR
UDR
$12.3B
| $108K | ﹤0.01% |
2,400
-119,000
| -98% | -$5.1M |
|
5153
Veeco
VECO
$3.05B
| $108K | ﹤0.01% |
+3,267
| New | +$122K |
|
5154
ProShares Ultra Bitcoin ETF
BITU
$339M
| $108K | ﹤0.01% |
4,191
-705
| -14% | -$18K |
|
5155
PUT
Vita Coco
COCO
$3.82B
| $107K | ﹤0.01% |
3,800
-12,400
| -77% | -$329K |
|
5156
PUT
Methanex
MEOH
$4.3B
| $107K | ﹤0.01% |
2,600
-4,800
| -65% | -$215K |
|
5157
CALL
Mercer International
MERC
$42.3M
| $107K | ﹤0.01% |
15,900
-23,100
| -59% | -$160K |
|
5158
Madison Square Garden
MSGS
$9.48B
| $107K | ﹤0.01% |
+518
| New | +$104K |
|
5159
PUT
MGIC Investment
MTG
$6.16B
| $107K | ﹤0.01% |
4,200
+4,100
| +4,100% | +$98.8K |
|
5160
PUT
Ormat Technologies
ORA
$6B
| $107K | ﹤0.01% |
1,400
-6,500
| -82% | -$482K |
|
|
PLL
5161
CALL
DELISTED
Piedmont Lithium
PLL
| $107K | ﹤0.01% |
12,000
-2,600
| -18% | -$23.5K |
|
5162
CALL
Sally Beauty Holdings
SBH
$1.43B
| $107K | ﹤0.01% |
7,900
-86,800
| -92% | -$1.03M |
|
5163
CALL
Verisk Analytics
VRSK
$25.4B
| $107K | ﹤0.01% |
400
-8,600
| -96% | -$2.33M |
|
5164
CALL
Zurn Elkay Water Solutions
ZWS
$8.38B
| $107K | ﹤0.01% |
3,000
+2,900
| +2,900% | +$91.7K |
|
5165
AMN Healthcare
AMN
$1.3B
| $106K | ﹤0.01% |
+2,503
| New | +$131K |
|
5166
Fossil Group
FOSL
$293M
| $106K | ﹤0.01% |
90,896
+47,704
| +110% | +$56K |
|
5167
CALL
Kontoor Brands
KTB
$4.63B
| $106K | ﹤0.01% |
1,300
-700
| -35% | -$50K |
|
|
OGI
5168
CALL
Organigram Holdings
OGI
$132M
| $106K | ﹤0.01% |
58,900
-65,000
| -52% | -$113K |
|
5169
PUT
Teradata
TDC
$2.92B
| $106K | ﹤0.01% |
3,500
+2,000
| +133% | +$59.7K |
|
|
AIV
5170
PUT
Aimco
AIV
$387M
| $105K | ﹤0.01% |
11,700
+11,500
| +5,750% | +$102K |
|
5171
Algoma Steel
ASTL
$406M
| $105K | ﹤0.01% |
10,328
-13,531
| -57% | -$125K |
|
5172
CALL
AMES National
ATLO
$271M
| $105K | ﹤0.01% |
5,800
+2,300
| +66% | +$44.2K |
|
5173
VanEck BDC Income ETF
BIZD
$1.59B
| $105K | ﹤0.01% |
6,368
+6,137
| +2,657% | +$101K |
|
|
BLUE
5174
DELISTED
bluebird bio
BLUE
| $105K | ﹤0.01% |
10,175
-5,456
| -35% | -$90.7K |
|
|
CIM
5175
Chimera Investment
CIM
$1.04B
| $105K | ﹤0.01% |
6,639
-917
| -12% | -$13.7K |
|
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.