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 | |
|---|---|---|---|---|---|---|
5976
FLEX LNG
FLNG
$1.69B
| $67K | ﹤0.01% |
2,652
-26,522
| -91% | -$726K |
|
5977
Schwab Fundamental US Small Company Index ETF
FNDA
$9.12B
| $67K | ﹤0.01% |
+2,384
| New | +$65K |
|
5978
Gain Therapeutics
GANX
$71.7M
| $67K | ﹤0.01% |
+17,983
| New | +$74.6K |
|
5979
Gladstone Capital
GLAD
$422M
| $67K | ﹤0.01% |
+3,133
| New | +$65.8K |
|
5980
PUT
Gossamer Bio
GOSS
$82.9M
| $67K | ﹤0.01% |
57,500
-150,800
| -72% | -$166K |
|
5981
CALL
James River Group Holdings
JRVR
$208M
| $67K | ﹤0.01% |
+7,300
| New | +$67K |
|
|
LITS
5982
CALL
Lite Strategy Inc
LITS
$32.8M
| $67K | ﹤0.01% |
+16,900
| New | +$76.6K |
|
5983
CALL
NMI Holdings
NMIH
$3.33B
| $67K | ﹤0.01% |
2,100
+1,800
| +600% | +$54.3K |
|
5984
NerdWallet
NRDS
$592M
| $67K | ﹤0.01% |
4,612
-10,458
| -69% | -$162K |
|
5985
Nurix Therapeutics
NRIX
$2.41B
| $67K | ﹤0.01% |
4,625
+4,558
| +6,803% | +$49K |
|
5986
YieldMax TSLA Option Income Strategy ETF
TSLY
$626M
| $67K | ﹤0.01% |
833
-2,462
| -75% | -$224K |
|
5987
PUT
Voyager Therapeutics
VYGR
$183M
| $67K | ﹤0.01% |
7,300
+6,400
| +711% | +$54K |
|
|
AIOT
5988
PUT
PowerFleet Inc
AIOT
$526M
| $67K | ﹤0.01% |
12,600
+12,100
| +2,420% | +$41K |
|
5989
CALL
ADC Therapeutics
ADCT
$134M
| $66K | ﹤0.01% |
+14,800
| New | +$54.6K |
|
|
5990
ADC Therapeutics
ADCT
$134M
| $66K | ﹤0.01% |
14,755
+13,576
| +1,151% | +$50.1K |
|
5991
Amprius Technologies
AMPX
$1.36B
| $66K | ﹤0.01% |
+25,093
| New | +$93.1K |
|
5992
Ameresco
AMRC
$1.12B
| $66K | ﹤0.01% |
2,762
-971
| -26% | -$21.8K |
|
5993
CALL
Avery Dennison
AVY
$13B
| $66K | ﹤0.01% |
300
-7,900
| -96% | -$1.64M |
|
5994
PUT
Compass Minerals
CMP
$1.23B
| $66K | ﹤0.01% |
4,200
-4,800
| -53% | -$101K |
|
5995
CALL
Cerence
CRNC
$385M
| $66K | ﹤0.01% |
4,200
-13,600
| -76% | -$230K |
|
5996
CALL
DNOW Inc
DNOW
$2.58B
| $66K | ﹤0.01% |
4,400
+2,400
| +120% | +$29K |
|
5997
PUT
ESAB
ESAB
$5.38B
| $66K | ﹤0.01% |
+600
| New | +$56K |
|
5998
PUT
Inogen
INGN
$175M
| $66K | ﹤0.01% |
8,300
+8,100
| +4,050% | +$57.3K |
|
5999
CALL
Limbach Holdings
LMB
$855M
| $66K | ﹤0.01% |
1,600
-11,000
| -87% | -$478K |
|
6000
PUT
Nelnet
NNI
$4.88B
| $66K | ﹤0.01% |
+700
| New | +$61.5K |
|
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.