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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5451
PUT
Build-A-Bear
BBW
$425M
| $113K | ﹤0.01% |
3,800
-134,000
| -97% | -$3.21M |
|
5452
PUT
CNA Financial
CNA
$14.2B
| $113K | ﹤0.01% |
2,500
-6,100
| -71% | -$269K |
|
5453
PUT
Columbia Sportswear
COLM
$3.04B
| $113K | ﹤0.01% |
1,400
+900
| +180% | +$71.5K |
|
5454
PUT
Delek US
DK
$4.16B
| $113K | ﹤0.01% |
3,700
-1,500
| -29% | -$40.6K |
|
|
SAFE
5455
CALL
Safehold
SAFE
$1.16B
| $113K | ﹤0.01% |
5,500
-49,900
| -90% | -$1.04M |
|
|
VRN
5456
DELISTED
Veren
VRN
| $113K | ﹤0.01% |
13,841
-72,715
| -84% | -$509K |
|
5457
PUT
Asure Software
ASUR
$232M
| $112K | ﹤0.01% |
+14,400
| New | +$129K |
|
5458
PUT
Bankunited
BKU
$3.37B
| $112K | ﹤0.01% |
4,000
-9,600
| -71% | -$268K |
|
5459
CALL
Kopin
KOPN
$652M
| $112K | ﹤0.01% |
62,400
-1,500
| -2% | -$3.33K |
|
5460
MannKind Corp
MNKD
$1.21B
| $112K | ﹤0.01% |
+24,873
| New | +$97.7K |
|
|
RDNW
5461
CALL
RideNow Group
RDNW
$238M
| $112K | ﹤0.01% |
17,400
-1,200
| -6% | -$8.37K |
|
|
SVC
5462
CALL
Service Properties Trust
SVC
$1.04B
| $112K | ﹤0.01% |
3,320
-14,220
| -81% | -$527K |
|
5463
Universal Health Services
UHS
$10.2B
| $112K | ﹤0.01% |
618
+451
| +270% | +$74.5K |
|
5464
PUT
W&T Offshore
WTI
$534M
| $112K | ﹤0.01% |
42,500
+24,900
| +141% | +$71.2K |
|
|
AMPS
5465
CALL
DELISTED
Altus Power
AMPS
| $112K | ﹤0.01% |
23,600
-87,700
| -79% | -$522K |
|
|
ADAP
5466
CALL
DELISTED
Adaptimmune Therapeutics
ADAP
| $111K | ﹤0.01% |
+70,500
| New | +$85.1K |
|
5467
PUT
BioXcel Therapeutics
BTAI
$24.9M
| $111K | ﹤0.01% |
2,481
+1,987
| +402% | +$94.8K |
|
5468
CALL
Bioventus
BVS
$892M
| $111K | ﹤0.01% |
21,400
+12,200
| +133% | +$59.6K |
|
5469
PUT
GDS Holdings
GDS
$6.56B
| $111K | ﹤0.01% |
16,800
+3,500
| +26% | +$23.7K |
|
5470
PUT
Helix Energy Solutions
HLX
$1.4B
| $111K | ﹤0.01% |
10,300
+3,300
| +47% | +$32.1K |
|
5471
CALL
Lloyds Banking Group
LYG
$89.5B
| $111K | ﹤0.01% |
42,900
+2,000
| +5% | +$4.59K |
|
|
OTLY
5472
Oatly Group
OTLY
$465M
| $111K | ﹤0.01% |
4,935
-3,303
| -40% | -$74.2K |
|
5473
PUT
Phinia Inc
PHIN
$2.7B
| $111K | ﹤0.01% |
2,900
+2,600
| +867% | +$84.6K |
|
5474
CALL
Sportradar
SRAD
$4.3B
| $111K | ﹤0.01% |
9,600
-28,600
| -75% | -$302K |
|
5475
PUT
Travere Therapeutics
TVTX
$5.2B
| $111K | ﹤0.01% |
14,400
-3,700
| -20% | -$31.2K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.