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 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
7901
Kaiser Aluminum
KALU
$2.48B
| $14K | ﹤0.01% |
234
-198
| -46% | -$14.6K |
|
7902
KT
KT
$8.74B
| $14K | ﹤0.01% |
1,167
+1,133
| +3,332% | +$15.6K |
|
7903
CALL
Lindsay Corp
LNN
$1.14B
| $14K | ﹤0.01% |
100
-200
| -67% | -$30.3K |
|
7904
CALL
Nicolet Bankshares
NIC
$3.6B
| $14K | ﹤0.01% |
200
| – | – |
|
|
NIU
7905
Niu Technologies
NIU
$200M
| $14K | ﹤0.01% |
+3,586
| New | +$21.9K |
|
7906
PUT
Nomad Foods
NOMD
$1.77B
| $14K | ﹤0.01% |
+1,000
| New | +$18K |
|
7907
Orion Energy Systems
OESX
$38.9M
| $14K | ﹤0.01% |
909
-1,508
| -62% | -$26.7K |
|
7908
PUT
ONE Gas
OGS
$5.01B
| $14K | ﹤0.01% |
200
-100
| -33% | -$8.06K |
|
7909
CALL
Oceaneering
OII
$4.64B
| $14K | ﹤0.01% |
1,800
-15,200
| -89% | -$143K |
|
7910
CALL
Peoples Bancorp
PEBO
$1.51B
| $14K | ﹤0.01% |
500
-700
| -58% | -$20.6K |
|
|
PINE
7911
CALL
Alpine Income Property Trust
PINE
$336M
| $14K | ﹤0.01% |
+900
| New | +$16.2K |
|
7912
CALL
Praxis Precision Medicines
PRAX
$8.11B
| $14K | ﹤0.01% |
440
-387
| -47% | -$19.3K |
|
7913
CALL
Primoris Services
PRIM
$4.06B
| $14K | ﹤0.01% |
900
-12,600
| -93% | -$263K |
|
7914
PUT
Reservoir Media
RSVR
$727M
| $14K | ﹤0.01% |
+3,000
| New | +$19.2K |
|
7915
Stellus Capital Investment Corp
SCM
$205M
| $14K | ﹤0.01% |
1,184
+1,099
| +1,293% | +$14.3K |
|
7916
Simmons First National
SFNC
$3.39B
| $14K | ﹤0.01% |
+654
| New | +$15.1K |
|
7917
CALL
Neuronetics
STIM
$127M
| $14K | ﹤0.01% |
4,600
+2,000
| +77% | +$7.27K |
|
7918
Shattuck Labs
STTK
$646M
| $14K | ﹤0.01% |
5,249
-259
| -5% | -$972 |
|
|
SUP
7919
DELISTED
Superior Industries International
SUP
| $14K | ﹤0.01% |
4,733
-115,545
| -96% | -$510K |
|
|
SUPV
7920
Grupo Supervielle
SUPV
$823M
| $14K | ﹤0.01% |
8,110
+3,788
| +88% | +$6.39K |
|
|
SUPV
7921
PUT
Grupo Supervielle
SUPV
$823M
| $14K | ﹤0.01% |
8,500
+3,700
| +77% | +$6.25K |
|
7922
CALL
Latham Group
SWIM
$660M
| $14K | ﹤0.01% |
3,900
+800
| +26% | +$4.57K |
|
7923
Tilly's
TLYS
$114M
| $14K | ﹤0.01% |
+2,030
| New | +$15.4K |
|
7924
CALL
ReposiTrak
TRAK
$160M
| $14K | ﹤0.01% |
2,700
+100
| +4% | +$544 |
|
7925
CALL
VistaGen Therapeutics
VTGN
$9.98M
| $14K | ﹤0.01% |
3,147
+610
| +24% | +$6.05K |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.